747 results on '"Levenberg–Marquardt algorithm"'
Search Results
2. Modelling of Groundwater Quality in Madurai Using ANN
- Author
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Deepak, M., Andal, L., Ageshwaran, M., Ganesan, H., Parasuraman, M., Jeeva, K. S., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Vinod Chandra Menon, N., editor, Kolathayar, Sreevalsa, editor, and Sreekeshava, K. S., editor
- Published
- 2024
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3. Retrieval of Parameter in Combined Mode Conduction–Radiation Problem in Porous Ceramic Matrix by Artificial Neural Network
- Author
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Acharya, Swagatika, Mishra, Vijay Kumar, Patel, Jitendra Kumar, Gupta, Gaurav, Sah, Mrityunjay K., Shah, Pinky, Cavas-Martínez, Francisco, Editorial Board Member, Chaari, Fakher, Series Editor, di Mare, Francesca, Editorial Board Member, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Editorial Board Member, Ivanov, Vitalii, Series Editor, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Revankar, Shripad, editor, Muduli, Kamalakanta, editor, and Sahu, Debjyoti, editor
- Published
- 2023
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4. THERMAL PERFORMANCE ESTIMATION OF A V-CORRUGATED SOLAR AIR HEATER USING ANN TECHNIQUES.
- Author
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Hasan, Mustafa Moayad and Hriczó, Krisztián
- Subjects
SOLAR air heaters ,ARTIFICIAL neural networks ,METEOROLOGICAL databases ,SOFT computing ,MULTILAYER perceptrons - Abstract
A solar air heater (SAH) is a unique form of solar thermal collector that utilizes solar energy emitted from the sun to produce heated air. Various experimental and theoretical investigations have been undertaken to improve the poor thermal performance of SAHs. The difficulties related to these studies drew attention toward a reliable soft computing technique exemplified by the Artificial Neural Network (ANN) technique. The current work applied actual meteorological data from Miskolc City, Hungary, to an ANN model with the structure of a Multi-layer Perceptron (MLP) to forecast the energy performance of a V-corrugated solar-powered air heater. Seven input parameters and one output parameter make up the ANN structure, with a single hidden layer. For the purpose of selecting the most effective network for predicting output parameters, ten neurons have been assessed. The suggested ANN model was trained with 336 data sets using the Levenberg-Marquardt (LM) learning technique. The comparison of anticipated and real thermal performance values shows a very good agreement. The statistical error analysis showed that the optimal ANN model structure of 7-8-1 can reliably and accurately predict SAH's thermal performance and thus it can save both time and cost. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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5. Enhanced Removal of Cr (VI) from Wastewater with Green and Low-Cost Nanomaterials Using a Fuzzy Inference System (FIS) and an Artificial Neural Network (ANN) †.
- Author
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Banza, Musamba and Seodigeng, Tumisang
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ARTIFICIAL neural networks ,ADSORPTION capacity ,CHROMIUM ions ,NANOSTRUCTURED materials ,EXPERIMENTAL design - Abstract
In this study, an artificial neural network (ANN) and an adaptive neuro-fuzzy inference system (ANFIS) were used to predict the adsorption potential of an adsorbent for the removal of chromium (VI) from an aqueous solution. Four operational variables were studied to assess their impact on the adsorption study in the ANFIS model: initial Ni (II) concentration (mg/L), pH, contact duration (min), and adsorbent dose (mg/L). To build the ANN model, 70% of the data was used for training and 15% for testing and validation. The network was trained using feedforward propagation and the Levenberg–Marquardt algorithm. The regression coefficients (R
2 ) for the ANFIS and ANN models were 0.99 and 0.98, respectively. The results show good agreement between the model-predicted and experimental data, indicating that the models are appropriate and compatible. The RMSE between the predicted and observed removal percentage values for the ANFIS model was 0.008, whereas the RMSE for the ANN model was 0.06. The AARE values between the predicted and experimental removal percentage values for the ANFIS and ANN models were determined to be 0.009 and 0.045, respectively. The MSE vales between the predicted and experimental removal percentages for the ANFIS and ANN models were found to be 0.002 and 0.035, respectively. The optimum conditions were as follows: pH 6, an initial concentration of 275 mg/L, a contact time of 60 min, and a dosage of 12.5 mg/L; the absorption was 91.00%. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
6. An Artificial Neural Network and Bayesian Network model for liquidity risk assessment in banking
- Author
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Mehrdad Farahabadi, Reza Eivazlou, and Hossein Safari
- Subjects
liquidity risk ,artificial neural network ,genetic algorithm ,levenberg–marquardt algorithm ,Finance ,HG1-9999 ,Regional economics. Space in economics ,HT388 - Abstract
Active Banks in the recent economic environment are obliged to encounter in a massive gamut of risks which are closely following them. If cash is regarded as cash at hand, then Liquidity risk is a kind of loss which arises of lack of fund or more specifically endured loss originating from inability of funding required capital in a reasonable way or selling off assets or being forced to have them pledged in order to cover solicited or unsolicited commitments. Hence Liquidity risk is comprised of economic loss incurred due to of providing cash and is deemed vital for operational activities of enterprises. Liquidity Mismatch in banks or maturity mismatch of sensitive assets to cash or debt may culminate in divergent of cash inflow or outflow during elapse of time which is actually stressed as Liquidity risk. Quarterly performance of 23 quoted banks in either Tehran Stock Exchange or Iran Farabourse are executed to model forecasted Banks’ Liquidity risk by means of implementing Artificial Neural Network algorithms. Applying genetic algorithm and Levenberg algorithm helped utilizing the best Training method and subsequently by facilitating Principal Component Analysis (PCA) method, we managed to optimize independent variables. Finally having hidden layers been determined and exercising calculations by Bayesian network model, the Artificial neural network is modeled and tested. All the mentioned process is performed by MATLAB software. Eventually fulfilling the asserted stages, a robust model for anticipating listed banks’ Liquidity risk is developed and findings of models for forcasted data is elaborated.
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- 2022
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7. Artificial neural network-based sensitivity analysis and experimental investigation of liquid–solid fluidization technique for low-grade coal upgradation.
- Author
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Kumari, Ajita, Tripathy, Alok, and Mandre, N. R.
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FLUIDIZATION , *PRESSURE drop (Fluid dynamics) , *SENSITIVITY analysis , *COAL , *TRANSFER functions - Abstract
Liquid-solid fluidization technique is being applied where low-grade coal or minerals enrichment is mostly density-based. Static and dynamic behavior of particles in a fluid medium has been extensively investigated over the years because of its dynamic applications across various industries. In this work, bed characterization studies and experiments have been conducted to study coal washing ability of the liquid-solid fluidized bed separator. Results have been recorded in terms of ash rejection%, combustible recovery% and separation efficiency%. Minimum fluidization velocity and pressure drop values have been predicted using existing theoretical correlations and compared with the experimental values. A three-layered (4:5:3) feedforward back-propagation (FFBP) neural network model was developed using Levenberg-Marquardt algorithm, LOGSIG and MSE as training, transfer and performance functions respectively. Garson's algorithm and connection weight approach have been employed for sensitivity analysis to interpret the neural network results physically. Coefficients of correlation, all R (including training, validation & testing datasets) obtained for outputs ash rejection (R = 0.9960), combustible recovery (R = 0.9952) and separation efficiency (R = 0.9944) suggest that predicted values are in agreement with the experimental values and the developed model is a good fit. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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8. Numerical investigation of heat transfer in helical tubes modified with aluminum oxide nanofluid and modeling of data obtained by artificial neural network.
- Author
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Boumari, Ehsan, Amiri, Masoumeh Mojazi, Khadang, Amirhosein, Maddah, Heydar, Ahmadi, Mohammad Hossein, and Sharifpur, Mohsen
- Subjects
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NANOFLUIDICS , *ARTIFICIAL neural networks , *ALUMINUM oxide , *HEAT transfer , *NUSSELT number , *ALUMINUM tubes - Abstract
The purpose of this study is to investigate the computational fluid dynamics to find the effects of Reynolds number, different volume fractions of aluminum oxide nanofluid and different heat fluxes in heat transfer performance (Nusselt number) in a helical tube. This simulation was investigated at Reynolds number range 2000 and 10,000 and volumetric fraction range 1% and 4% of aluminum oxide nanofluid and constant heat fluxes of 4000–6000 W/m2. The single-phase model was used to model the nanofluid and the feasible k-ε model was used to simulate the turbulent flow. Then, perceptron artificial neural networks with the Levenberg–Marquardt algorithm were used to predict the Nusselt number such that input parameters include Reynolds number, nanoparticle volume fraction and output or target was considered Nusselt number for the network. The results show that with increasing the volume fraction of aluminum oxide nanofluid and Reynolds number, the Nusselt number increases by about 20.35%. Also, by increasing the constant heat flux from 4000–6000 W/m2, the Nusselt number increases by 18.75%. The results of the artificial neural network show that the topology 2-10-1 is very successful in predicting the Nusselt number so that the minimum mean squared error for the data allocated to the training and validation sections were 0.024449627 and 0.117025052, respectively, which are obtained under optimal epochs 19 and 9. The value of the correlation coefficient obtained in predicting the Nusselt number is 0.944416302. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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9. Estimation of Parameter in Non-Newtonian Third-Grade Fluid Problem by Artificial Neural Network Under Noisy Data
- Author
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Mishra, Vijay Kumar, Chaudhuri, Sumanta, Patel, Jitendra K., Sengupta, Arnab, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Revankar, Shripad, editor, Sen, Swarnendu, editor, and Sahu, Debjyoti, editor
- Published
- 2021
- Full Text
- View/download PDF
10. Enhanced Removal of Cr (VI) from Wastewater with Green and Low-Cost Nanomaterials Using a Fuzzy Inference System (FIS) and an Artificial Neural Network (ANN)
- Author
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Musamba Banza and Tumisang Seodigeng
- Subjects
artificial neural network ,adaptive neuro-fuzzy inference system ,wastewater ,removal ,Levenberg–Marquardt algorithm ,Engineering machinery, tools, and implements ,TA213-215 - Abstract
In this study, an artificial neural network (ANN) and an adaptive neuro-fuzzy inference system (ANFIS) were used to predict the adsorption potential of an adsorbent for the removal of chromium (VI) from an aqueous solution. Four operational variables were studied to assess their impact on the adsorption study in the ANFIS model: initial Ni (II) concentration (mg/L), pH, contact duration (min), and adsorbent dose (mg/L). To build the ANN model, 70% of the data was used for training and 15% for testing and validation. The network was trained using feedforward propagation and the Levenberg–Marquardt algorithm. The regression coefficients (R2) for the ANFIS and ANN models were 0.99 and 0.98, respectively. The results show good agreement between the model-predicted and experimental data, indicating that the models are appropriate and compatible. The RMSE between the predicted and observed removal percentage values for the ANFIS model was 0.008, whereas the RMSE for the ANN model was 0.06. The AARE values between the predicted and experimental removal percentage values for the ANFIS and ANN models were determined to be 0.009 and 0.045, respectively. The MSE vales between the predicted and experimental removal percentages for the ANFIS and ANN models were found to be 0.002 and 0.035, respectively. The optimum conditions were as follows: pH 6, an initial concentration of 275 mg/L, a contact time of 60 min, and a dosage of 12.5 mg/L; the absorption was 91.00%.
- Published
- 2023
- Full Text
- View/download PDF
11. A neural network-based approach for prediction of PGA and significant duration parameters in the Uttarakhand region of India.
- Author
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Baishya, Rishav and Sarkar, Rajib
- Abstract
The state of Uttarakhand has several prime population centers, and it is considered to be among the most seismically active regions of India. The article presents Artificial Neural Network-based prediction models using Multilayer Perceptron technique for the Himalayan earthquakes specifically for the region of Uttarakhand. Feed Forward Back Propagation Levenberg–Marquardt algorithm-based prediction models are developed for assessing the Peak Ground Acceleration (PGA) and Significant Duration (SD) with the availability of independent parameters such as moment magnitude (M
w ), focal depth (F), epicentral distance (E), hypocentral distance (H), and site class (SC) considering either rock or soil site. Two PGA models were developed having high correlation (R) of 0.896 and 0.916 respectively whereas the developed SD model showed correlation value of 0.873. The higher accuracy of the models was ensured by objectivity function (OBJ) values of 0.011 and 0.006 for the two PGA models respectively and 3.6 for the SD model. The developed models are compared with available prediction equations, and it is inferred that the models yield higher accuracy in predicting the earthquake parameters for Uttarakhand state of India. However, it should be noted that the models are suitable for magnitudes (Mw ) between 3.0 and 7.0 and for hypocentral distance between 9 and 254 km. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF
12. Estimation of hourly global solar radiation using artificial neural network in Adana province, Turkey.
- Author
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GONCU, Onur, KOROGLU, Tahsin, and OZDIL, Naime Filiz
- Subjects
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SOLAR radiation , *GLOBAL radiation , *METEOROLOGICAL services , *EARTH temperature , *SIMULATION software , *ARTIFICIAL neural networks - Abstract
Since global solar radiation (GSR) is an important parameter for the design, installation, and operation of solar energy-based systems, it is important to have precise information about it. As the indicating devices are expensive and their requirements such as operation and maintenance should be carried out, the measurement of solar radiation cannot be frequently taken. On the other hand, the measurements of different meteorological parameters such as relative humidity and ground surface temperature are more prevalent in meteorology stations. Therefore, the estimation of solar radiation is a significant parameter for the areas where the measurements could not be performed and to complete the missing information in databases. Many different models, software, and simulation programs are utilized to calculate solar radiation data, provide an economic advantage, and obtain high accuracy. The main purpose of this study is to perform an estimation of solar radiation in Adana, where is on the east of the Mediterranean in Turkey, by using an artificial neural network (ANN) model. The best estimation performance is obtained by optimizing the neuron numbers used in the network's hidden layer with the trial and error method. With this aim, hourly data including wind speed, wind direction, humidity, actual pressure, and average temperature are taken as inputs while solar radiation is taken as a target. All these data, which is for 2018, has taken from the Turkish State Meteorological Service. A linear correlation coefficient value has been obtained to be about 0.87313 with the mean square error (MSE) of 5.8262x107 W/m2 for the testing data set. The ANN's testing/validation results show that it has a low MSE, indicating the accuracy and adequacy of the network model. Besides, the predicted ANN output is evaluated to be remarkably close to the measured target data by considering the linear correlation coefficient. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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13. Climate-induced thermoregulatory responses in a non-linear thermal environment: investigating the inter-dependencies using a facile artificial neural network-based predictive strategy.
- Author
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Dasgupta, Jhilly and Nag, Pranab Kumar
- Subjects
ARTIFICIAL neural networks ,ALGORITHMS ,THERMAL resistance ,HEAT transfer - Abstract
Objectives. Given the burgeoning impacts of climatic variability on human health, suitable computational paradigms are used to explore the subsequent ergonomic repercussions. The artificial neural network (ANN), in particular, exhibits near-accurate input–output mapping. However, employment of the ANN to trace the inter-dependencies between the climatic and human thermoregulatory parameters in real-world fuzzy problem landscapes is relatively inadequate. In the present study, the ANN models examined the relationships between climatic, behavioral and intrinsic input factors and the thermoregulatory outputs, namely, sweating and the evaporative heat transfer at the skin surface (E
sk ). Methods. The data were obtained from nearly 1800 subjects who were exposed to a hot and humid climate outdoors. The ANN models were trained using the Levenberg–Marquardt algorithm combined with Bayesian regularization. Results. The predictability of the ANN models was statistically substantiated. The clothing insulation factor was not included as an input parameter, given its similar values. Intriguingly, the ANN results indicated that fabrics with similar thermal resistances could still affect Esk , plausibly owing to the temporal variation in the evaporative resistance of fabrics among individuals. Conclusion. The reasonably accurate results affirmed the suitability of ANN as a pragmatic technique that could elucidate heat-induced ergonomic challenges. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
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14. Application of Design of Experiments® Approach-Driven Artificial Intelligence and Machine Learning for Systematic Optimization of Reverse Phase High Performance Liquid Chromatography Method to Analyze Simultaneously Two Drugs (Cyclosporin A and Etodolac) in Solution, Human Plasma, Nanocapsules, and Emulsions
- Author
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Rahman, Syed Nazrin Ruhina, Katari, Oly, Pawde, Datta Maroti, Boddeda, Gopi Sumanth Bhaskar, Goswami, Abhinab, Mutheneni, Srinivasa Rao, and Shunmugaperumal, Tamilvanan
- Abstract
The objectives of current investigation are (1) to find out wavelength of maximum absorbance (λ
max ) for combined cyclosporin A and etodolac solution followed by selection of mobile phase suitable for the RP-HPLC method, (2) to define analytical target profile and critical analytical attributes (CAAs) for the analytical quality by design, (3) to screen critical method parameters with the help of full factorial design followed by optimization with face-centered central composite design (CCD) approach-driven artificial neural network (ANN)-linked with the Levenberg–Marquardt (LM) algorithm for finding the RP-HPLC conditions, (4) to perform validation of analytical procedures (trueness, linearity, precision, robustness, specificity and sensitivity) using combined drug solution, and (5) to determine drug entrapment efficiency value in dual drug-loaded nanocapsules/emulsions, percentage recovery value in human plasma spiked with two drugs and solution state stability analysis at different stress conditions for substantiating the double-stage systematically optimized RP-HPLC method conditions. Through isobestic point and scouting step, 205 nm and ACN:H2 O mixture (74:26) were selected respectively as the λmax and mobile phase. The ANN topology (3:10:4) indicating the input, hidden and output layers were generated by taking the 20 trials produced from the face-centered CCD model. The ANN-linked LM model produced minimal differences between predicted and observed values of output parameters (or CAAs), low mean squared error and higher correlation coefficient values in comparison to the respective values produced by face-centered CCD model. The optimized RP-HPLC method could be applied to analyze two drugs concurrently in different formulations, human plasma and solution state stability checking. [ABSTRACT FROM AUTHOR]- Published
- 2021
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15. Application of Computational Intelligence Methods for Predicting Soil Strength
- Author
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Abbaspour-Gilandeh Yousef and Abbaspour-Gilandeh Mohammadreza
- Subjects
artificial neural network ,anfis ,cone index ,modeling ,levenberg-marquardt algorithm ,Agriculture (General) ,S1-972 - Abstract
The aim of this study was to make predictions for soil cone index using artificial neural networks (ANNs), adaptive neuro-fuzzy inference system (ANFIS) and a regression model. Field tests were conducted on three soil textures and obtained results were analyzed by application of a factorial experiment based on a Randomized Complete Block Design with five replications. The four independent variables of percentage of soil moisture content, soil bulk density, electrical conductivity and sampling depth were used to predict soil cone index by ANNs, ANFIS and a regression model. The ANNs design was that of back propagation multilayer networks. Predictions of soil cone index with ANFIS were made using the hybrid learning model. Comparison of results acquired from ANNs, ANFIS and regression models showed that the ANFIS model could predict soil cone index values more accurately than ANNs and regression models. Considering the ANFIS model, a novel result on soil compaction modeling, relative error (ε), and regression coefficient (R2) were calculated at 2.54% and 0.979, respectively.
- Published
- 2019
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16. Control of Induction Motor Using Artificial Neural Network
- Author
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Kumar, Abhishek, Singh, Rohit, Singh Mahodi, Chandan, Kumar Sahoo, Sarat, Kacprzyk, Janusz, Series editor, Pal, Nikhil R., Advisory editor, Bello Perez, Rafael, Advisory editor, Corchado, Emilio S., Advisory editor, Hagras, Hani, Advisory editor, Kóczy, László T., Series editor, Kreinovich, Vladik, Advisory editor, Lin, Chin-Teng, Advisory editor, Lu, Jie, Advisory editor, Melin, Patricia, Advisory editor, Nedjah, Nadia, Advisory editor, Nguyen, Ngoc Thanh, Advisory editor, Wang, Jun, Advisory editor, Dash, Subhransu Sekhar, editor, Vijayakumar, K., editor, Panigrahi, Bijaya Ketan, editor, and Das, Swagatam, editor
- Published
- 2017
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17. Acoustic Characterization of Rooms Using Reverberation Time Estimation Based on Supervised Learning Algorithm.
- Author
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Ciaburro, Giuseppe and Iannace, Gino
- Subjects
REVERBERATION time ,SUPERVISED learning ,MACHINE learning ,TIME perception ,SOUND reverberation ,ARTIFICIAL neural networks - Abstract
The measurement of reverberation time is an essential procedure for the characterization of the acoustic performance of rooms. The values returned by these measurements allow us to predict how the sound will be transformed by the walls and furnishings of the rooms. The measurement of the reverberation time is not an easy procedure to carry out and requires the use of a space in an exclusive way. In fact, it is necessary to use instruments that reproduce a sound source and instruments for recording the response of the space. In this work, an automatic procedure for estimating the reverberation time based on the use of artificial neural networks was developed. Previously selected sounds were played, and joint sound recordings were made. The recorded sounds were processed with the extraction of characteristics, then they were labeled by associating to each sound the value of the reverberation time in octave bands of that specific room. The obtained dataset was used as input for the training of an algorithm based on artificial neural networks. The results returned by the predictive model suggest using this methodology to estimate the reverberation time of any closed space, using simple audio recordings without having to perform standard measurements or calculate the integration explicitly. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
18. Artificial neural network based water quality index (WQI) for river Godavari (India)
- Author
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Vinayak K. Patki, Jyotiprakash G. Nayak, and L.G. Patil
- Subjects
010302 applied physics ,Index (economics) ,Artificial neural network ,02 engineering and technology ,General Medicine ,021001 nanoscience & nanotechnology ,computer.software_genre ,01 natural sciences ,Bayesian interpretation of regularization ,Data set ,Levenberg–Marquardt algorithm ,Conjugate gradient method ,0103 physical sciences ,Hidden layer ,Data mining ,Water quality ,0210 nano-technology ,computer ,Mathematics - Abstract
The water quality index has been universally accepted as an indicator to represent the water quality status of the surface water body comprehensively. The prevalent conventional Water Quality Indices (WQIs) suffer from limitations such as 'eclipsing' and 'ambiguity'. Artificial intelligence techniques such as artificial neural networks (ANNs) have gained importance to overcome the limitations of conventional WQIs. In the present study, the Levenberg Marquardt (LM) algorithm and the Scaled Conjugate Gradient (SCG) algorithm have been compared to develop WQI based on the ANN approach (i.e ANNWQI). It is observed that the LM algorithm outperforms the SCG algorithm for prediction of ANNWQI of Indian streams, while the Bayesian Regularization algorithm has not been found suitable for the same purpose in the present study. It is also observed that both LM and SCG algorithm gives robust predictions when the hidden layer contains ten neurons. The combination of data set partitioning of training (75%), Validation (15%), and testing (10%) have been found to give the robust performance of prediction of ANNWQI for Indian streams. The predicted ANNWQI model using the LM algorithm has a very high correlation with the measured WQI values and therefore recommended to be adopted as an effective alternative, to avoid lengthy calculations involved in prevalent conventional WQI.
- Published
- 2023
19. Short-term electric load forecasting in Tunisia using artificial neural networks.
- Author
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Houimli, Rim, Zmami, Mourad, and Ben-Salha, Ousama
- Abstract
The accuracy of short-term electricity load forecasting is of great interest since it allows avoiding unexpected blackouts and lowering operating costs. In this paper, we aim to implement the artificial neural networks to model and forecast the half-hourly electric load demand in Tunisia over the period 2000–2008. To improve the quality of forecasts, the proposed artificial neural network model uses not only past electric load values as inputs, but also climatic and calendar variables. To determine the optimal structure of the neural network model, this paper employs the pattern search algorithm. Moreover, the neural network model is equipped with the Levenberg–Marquardt learning algorithm. Our findings confirm the performance of this algorithm to the view of evaluation indicators since the mean absolute percentage error values range between 1.1 and 3.4%. The analysis also shows the superiority of the Levenberg–Marquardt algorithm compared to the resilient back propagation algorithm and the conjugate gradient algorithm. In the light of the current research, we stress the aptness of the proposed artificial neural network model in forecasting short-term electricity demand. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
20. Neuro-fuzzy modeling and prediction of summer precipitation with application to different meteorological stations.
- Author
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Bukhari, Ayaz Hussain, Sulaiman, Muhammad, Islam, Saeed, Shoaib, Muhammad, Kumam, Poom, and Zahoor Raja, Muhammad Asif
- Subjects
METEOROLOGICAL stations ,MARQUARDT algorithm ,METEOROLOGICAL precipitation ,PREDICTION models ,ARTIFICIAL neural networks - Abstract
Research community has a growing interest in neural networks because of their practical applications in many fields for accurate modeling and prediction of the complex behavior of systems arising from engineering, economics, business, financial and metrological fields. Artificial neural networks (ANN) are very flexible function approximations tool used as universal modeling based on the separating of the past dynamics into clusters, in which we construct local models to capture the potential growth of the series depends on the previously known values. In this study, rain data of five major cities of Sindh province of Pakistan is considered, and summer rainfall of these five synoptic stations are statistically evaluated for prediction. The nonlinear autoregressive network with exogenous inputs (NARX) model for a time series is analyzed to evaluate the pattern of precipitation. We train a highly nonlinear NARX network model from randomly generated initial weights that converged to the best solution with the help of the Levenberg - Marquardt algorithm. A multi-step ahead NARX response time predictor is developed for rain forecasting. The performance of the NARX model is viable to capture nonlinear behavior with a high value of correlation coefficient R ranging from 0.70 to 0.99 for different synoptic stations. The results calculated using the proposed NARX neural network time series approach are accurate and reliable based on the coefficient of correlation and mean square error indices for rainfall forecasting. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
21. Suspended sediment discharge modeling during flood events using two different artificial neural network algorithms.
- Author
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Bouguerra, Hamza, Tachi, Salah-Eddine, Derdous, Oussama, Bouanani, Abderrazak, and Khanchoul, Kamel
- Subjects
- *
SUSPENDED sediments , *ARTIFICIAL neural networks , *STANDARD deviations , *QUASI-Newton methods - Abstract
This paper presents modeling of artificial neural network (ANN) to forecast the suspended sediment discharges (SSD) during flood events in two different catchments in the Seybouse basin, northeastern Algeria. This study was carried out on hourly SSD and water discharge data during flood events from a period of 31 years in the Ressoul catchment and of 28 years in the Mellah catchment. The ANNs were trained according to two different algorithms: the Levenberg–Marquardt algorithm (LM) and the Quasi-Newton algorithm (BFGS). Seven input combinations were trained for the SSD prediction. The performance results indicated that both algorithms provided satisfactory simulations according to the determination coefficient (R2) and root mean squared error (RMSE) performance criteria, with priority to the BFGS algorithm; the coefficient of determination using the LM algorithm varies between 51.0 and 90.2%, whereas using the BFGS algorithm it varies between 54.3 and 93.5% in both studied catchments, with calculated improvement for all seven developed networks with the best improvement in the Ressoul catchment presented in ANN06 with Δ R 2 4.23% and Δ RMSE 1.74‰, and with the best improvement presented in ANN05 with Δ R 2 6.07% and Δ RMSE 0.71‰ in the Mellah catchment. The analysis showed that the use of Quasi-Newton method performed better than the Levenberg–Marquardt in both studied areas. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
22. A novel system for effective speech recognition based on artificial neural network and opposition artificial bee colony algorithm.
- Author
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Shukla, Shilpi and Jain, Madhu
- Subjects
ARTIFICIAL neural networks ,AUTOMATIC speech recognition ,BEES algorithm ,AMPLITUDE modulation ,MATHEMATICAL optimization - Abstract
The problem related to speech recognition system becomes challenging if vocabularies are having too many similar-sounding words. To overcome these types of challenges, an effective speech recognition system using artificial neural network (ANN) with optimization technique is proposed. In this system, distinct words spoken by different people are considered as input speech signal. The features of these input speech signals are extracted using amplitude modulation spectrogram. The extracted features are then the input to the ANN for training. The trained ANN inputs are used for predicting the isolated words during testing. In this work, the default structure of ANN is redesigned using Levenberg–Marquardt algorithm, to retrieve optimal prediction rate with accuracy. The hidden layers and neurons of the hidden layers are further optimized using the opposition artificial bee colony optimization technique. The outcome of the system demonstrates that the sensitivity, specificity, and accuracy of the proposed technique is 90.41%, 99.66%, and 99.36%, respectively, which is better than all the existing methods. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
23. Estimation of release history of groundwater pollution source using ANN model
- Author
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Ayaz, Md.
- Published
- 2022
- Full Text
- View/download PDF
24. Extraction, analysis and desaturation of gmelina seed oil using different soft computing approaches
- Author
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F. Chigozie Uzoh and D. Okechukwu Onukwuli
- Subjects
Gmelina seed oil ,Response surface methodology ,Artificial neural network ,Genetic algorithm ,Levenberg–Marquardt algorithm ,Optimization ,Chemical engineering ,TP155-156 - Abstract
Artificial Neural Network (ANN)-Genetic Algorithm (GA) interface and Response Surface Methodology (RSM) have been compared as tools for simulation and optimization of gmelina seed oil extraction process. A multi-layer feed-forward Levenberg Marquardt back-propagation algorithm was incorporated for developing a predictive model which was optimized using GA. Design Expert simulation and optimization tools were also incorporated for a detailed simulation and optimization of the same process using Response surface methodology (RSM). It was found that oil yield increased with rise in temperature, time and volume of solvent but decreased with increase in seed particle size. The maximum oil yield obtained using the numerical optimization techniques show that 49.2% were predicted by the RSM at the optimum conditions of; 60 °C temperature, extraction time 60 min, 150 μm seed particle size, 150 ml solvent volume and 49.8% by ANN-GA at extraction temperature 40 °C, extraction time 40 min, 200 μm seed particle size, 100 ml solvent volume, respectively. The prediction accuracy of both models were more than 95%. Models validation experiments indicate that the predicted and the actual were in close agreement. The extract was analyzed to examine its physico-chemical properties (acid value, iodine value, peroxide value, viscosity, saponification value, moisture and ash content, refractive index, smoke, flash and fire points and specific gravity) and structural elucidation by standard methods and instrumental techniques. Results revealed that the oil is non-drying and edible. Desaturation of the oil further reveal its potential in alkyd resin synthesis.
- Published
- 2016
- Full Text
- View/download PDF
25. Diagnostic and prognostic analysis of oil and gas pipeline with allowable corrosion rate in Niger Delta Area, Nigeria
- Author
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M. Obaseki
- Subjects
Artificial neural network ,Levenberg-Marquardt algorithm ,condition prediction ,oil and gas data ,Science - Abstract
This paper presents diagnostic and prognostic analysis of oil and gas pipeline industries with allowable corrosion rate using artificial neural networks approach. The results revealed sand deposit, carbon dioxide (CO2) partial pressure, pipe age, diameter and length, temperature, flow velocity of the fluid, fluid pressure, chloride contents and pH value of its environment as the relevant parameters affecting corrosion of oil and gas pipeline in this region. Condition prediction of steel pipes used for the transmission of oil and gas varies 0.02 mm/yr to 0.10 mm/yr. The training of the neural network was performed using Levenberg-Marquardt algorithm and optimal regression coefficient was equal to 0.99, for the network 10-40-1. Also, the results show a remarkable agreement with the field measurement. A corrosion severity level of two (0.01 mm/yr to 0.10 mm/yr) oil and gas pipelines was established from the analysis. Keywords: Artificial neural network, Levenberg-Marquardt algorithm, condition prediction, oil and gas data
- Published
- 2019
- Full Text
- View/download PDF
26. Acoustic Characterization of Rooms Using Reverberation Time Estimation Based on Supervised Learning Algorithm
- Author
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Giuseppe Ciaburro and Gino Iannace
- Subjects
reverberation time ,sound recording ,sound fields ,spatial coherence ,artificial neural network ,Levenberg–Marquardt algorithm ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The measurement of reverberation time is an essential procedure for the characterization of the acoustic performance of rooms. The values returned by these measurements allow us to predict how the sound will be transformed by the walls and furnishings of the rooms. The measurement of the reverberation time is not an easy procedure to carry out and requires the use of a space in an exclusive way. In fact, it is necessary to use instruments that reproduce a sound source and instruments for recording the response of the space. In this work, an automatic procedure for estimating the reverberation time based on the use of artificial neural networks was developed. Previously selected sounds were played, and joint sound recordings were made. The recorded sounds were processed with the extraction of characteristics, then they were labeled by associating to each sound the value of the reverberation time in octave bands of that specific room. The obtained dataset was used as input for the training of an algorithm based on artificial neural networks. The results returned by the predictive model suggest using this methodology to estimate the reverberation time of any closed space, using simple audio recordings without having to perform standard measurements or calculate the integration explicitly.
- Published
- 2021
- Full Text
- View/download PDF
27. Modelling of back propagation neural network to predict the thermal performance of porous bed solar air heater.
- Author
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GHRITLAHRE, HARISH KUMAR and PRASAD, RADHA KRISHNA
- Subjects
- *
SOLAR air heaters , *BACK propagation , *STANDARD deviations , *ARTIFICIAL neural networks - Abstract
The objective of present work is to predict the thermal performance of wire screen porous bed solar air heater using artificial neural network (ANN) technique. This paper also describes the experimental study of porous bed solar air heaters (SAH). Analysis has been performed for two types of porous bed solar air heaters: unidirectional flow and cross flow. The actual experimental data for thermal efficiency of these solar air heaters have been used for developing ANN model and trained with Levenberg-Marquardt (LM) learning algorithm. For an optimal topology the number of neurons in hidden layer is found thirteen (LM-13).The actual experimental values of thermal efficiency of porous bed solar air heaters have been compared with the ANN predicted values. The value of coeffi- cient of determination of proposed network is found as 0.9994 and 0.9964 for unidirectional flow and cross flow types of collector respectively at LM-13. For unidirectional flow SAH, the values of root mean square error, mean absolute error and mean relative percentage error are found to be 0.16359, 0.104235 and 0.24676 respectively, whereas, for cross flow SAH, these values are 0.27693, 0.03428, and 0.36213 respectively. It is concluded that the ANN can be used as an appropriate method for the prediction of thermal performance of porous bed solar air heaters. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
28. Diagnostic and Prognostic Analysis of Oil and Gas Pipeline with allowable Corrosion Rate in Niger Delta Area, Nigeria.
- Author
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OBASEKI, M.
- Abstract
This paper presents diagnostic and prognostic analysis of oil and gas pipeline industries with allowable corrosion rate using artificial neural networks approach. The results revealed sand deposit, carbon dioxide (CO
2 ) partial pressure, pipe age, diameter and length, temperature, flow velocity of the fluid, fluid pressure, chloride contents and pH value of its environment as the relevant parameters affecting corrosion of oil and gas pipeline in this region. Condition prediction of steel pipes used for the transmission of oil and gas varies 0.02 mm/yr to 0.10 mm/yr. The training of the neural network was performed using Levenberg-Marquardt algorithm and optimal regression coefficient was equal to 0.99, for the network 10-40-1. Also, the results show a remarkable agreement with the field measurement. A corrosion severity level of two (0.01 mm/yr to 0.10 mm/yr) oil and gas pipelines was established from the analysis. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
29. Estimation of net surface radiation from eddy flux tower measurements using artificial neural network for cloudy skies
- Author
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Dangeti Venkata Mahalakshmi, Arati Paul, Dibyendu Dutta, Meer Mohammed Ali, Rodda Suraj Reddy, Chandrashekhar Jha, Jaswant Raj Sharma, and Vinay Kumar Dadhwal
- Subjects
Artificial neural network ,Levenberg–Marquardt algorithm ,Meteorological parameters ,Net surface radiation ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Accurate knowledge of net surface radiation (NSR) is required to understand the soil-vegetation-atmosphere feedbacks. However, NSR is seldom measured due to the technical and economical limitations associated with direct measurements. An artificial neural network (ANN) technique with Levenberg–Marquardt learning algorithm was used to estimate NSR for a tropical mangrove forest of Indian Sundarban with routinely measured meteorological variables. The root mean square error (RMSE), mean absolute error (MAE), modelling efficiency (ME), coefficient of residual mass (CRM) and coefficient of determination (R2) between ANN estimated and measured NSR were 37 W m−2, 26 W m−2, 0.95, 0.017 and 0.97 respectively under all-weather conditions. Thus, the ANN estimated NSR values presented in this study are comparable to those reported in literature. Further, a detailed study on the estimated NSR for cloudy skies was also analysed. ANN estimated NSR values were compared with in situ measurements for cloudy days and non-cloudy days. The RMSE, MAE and CRM of the model decrease to half when considering the non-cloudy days. Thus, the results demonstrate that major source error in estimating NSR comes from the cloudy skies. Sensitivity of input variables to NSR was further analysed.
- Published
- 2016
- Full Text
- View/download PDF
30. Estimating Suspended Sediment by Artificial Neural Network (ANN), Decision Trees (DT) and Sediment Rating Curve (SRC) Models (Case study: Lorestan Province, Iran)
- Author
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Fatemeh Barzegari, Mohsen Yousefi, and Ali Talebi
- Subjects
artificial neural network ,cart algorithm ,decision tree ,levenberg-marquardt algorithm ,sediment rating curve ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The aim of this study was to estimate suspended sediment by the ANN model, DT with CART algorithm and different types of SRC, in ten stations from the Lorestan Province of Iran. The results showed that the accuracy of ANN with Levenberg-Marquardt back propagation algorithm is more than the two other models, especially in high discharges. Comparison of different intervals in models showed that running models with monthly data,resulted in smaller error and better estimated results. Moreover, results showed that using Minimum Variance Unbiased Estimator (MVUE) bias correction factor modified the SRC results, especially in monthly time steps in almost all stations. Hence, it can be said that if because of advantages such as simplicity, SRC models are preferred, it is better that MSRC (modified sediment rating curve) is used in monthly period.
- Published
- 2015
- Full Text
- View/download PDF
31. Minimum Fluidization Velocities of Binary Solid Mixtures: Empirical Correlation and Genetic Algorithm‐Artificial Neural Network Modeling
- Author
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Sudipta Let, Nirjhar Bar, Sudip Kumar Das, and Ranjan Kumar Basu
- Subjects
Levenberg–Marquardt algorithm ,Correlation ,Artificial neural network ,Computer science ,General Chemical Engineering ,Genetic algorithm ,Binary number ,General Chemistry ,Fluidization ,Algorithm ,Industrial and Manufacturing Engineering - Published
- 2021
32. Backpropagation of Levenberg Marquardt artificial neural networks for wire coating analysis in the bath of Sisko fluid
- Author
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Muhammad Asif Zahoor Raja, Muhammad Shoaib, Eman S. Al-Aidarous, Muhammed Shabab Alhothuali, and Jawaher Lafi Aljohani
- Subjects
Artificial neural network ,Mean squared error ,Computer science ,020209 energy ,020208 electrical & electronic engineering ,Supervised learning ,Reference data (financial markets) ,General Engineering ,Stability (learning theory) ,Wire coating ,02 engineering and technology ,Engineering (General). Civil engineering (General) ,Backpropagation ,Levenberg–Marquardt algorithm ,Levenberg Marquardt ,Sisko fluid ,Histogram ,0202 electrical engineering, electronic engineering, information engineering ,Intelligent computing ,TA1-2040 ,Algorithm - Abstract
In the artificial neural networks domain, the Levenberg-Marquardt technique is novel with convergent stability and generates a numerical solution of the wire coating system for Sisko fluid flow (WCS-SFF) through regression plots, histogram representations, state transition measures, and means squared errors. In this paper, the analysis of fluid flow problem based on WCS-SFF is studied with a new application of intelligent computing system via supervised learning mechanism using the efficacy of neural networks trained by Levenberg-Marquardt algorithm (NN-TLMA). The original mathematical formulation in terms of PDEs for WCS-SFF is converted into dimensionless nonlinear ODEs. The data collection for the projected NN-TLMA is produced for parameters associated with the system model WCS-SFF influencing the velocity using the explicit Runge-Kutta technique. The training, validation, and testing processes of NN-TLMA are utilized to evaluate the obtained results of WCS-SFF for various cases, and a comparison of the obtained results is performed with reference data set to check the accuracy and effectiveness of the proposed algorithm NN-TLMA for the analysis of non-Newtonian fluid problem-related WCS-SFF. The proposed NN-TLMA for solving the WCS-SFF is effectively confirmed through state transition dynamics, mean square error, regression analyses, and error histogram studies. The powerful consistency of suggested outcomes with reference solutions indicates the validity of the framework, and the accuracy of 10 - 8 to 10 - 6 is also achieved.
- Published
- 2021
33. Comparative prediction of surface roughness for MAFM finished aluminium/silicon carbide/aluminium trioxide/rare earth oxides (Al/SiC/Al2O3)/REOs) composites using a Levenberg–Marquardt Algorithm and a Box–Behnken Design
- Author
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Mayur Sharma, Vinod Kumar, Ravinder Singh Joshi, Vipin Kumar Sharma, and Gorti Janardhan
- Subjects
Materials science ,Artificial neural network ,Mechanical Engineering ,Rare earth ,chemistry.chemical_element ,Box–Behnken design ,Industrial and Manufacturing Engineering ,Levenberg–Marquardt algorithm ,chemistry.chemical_compound ,chemistry ,Aluminium ,Surface roughness ,Silicon carbide ,Composite material ,Trioxide - Abstract
The aim of the current research is to compare the surface roughness models based on the Box–Behnken Design and Levenberg–Marquardt Algorithm-based artificial neural networks. For prediction of the surface roughness of magnetic abrasive flow machining (MAFM) finished rare earth oxides (REOs) aluminium composites, Box–Behnken Design models were developed using three-level factorial design as magnetic flux density, number of cycles and extrusion pressure as process parameters. The artificial neural networks predictive models of surface roughness were developed using feed forward back propagation network procedures called the Levenberg-Marquardt Algorithm. Also, an attempt has been made to compare the Levenberg–Marquardt Algorithm-based artificial neural networks and Box–Behnken Design for the modeling of surface roughness results. The value of coefficient of determination for the Box–Behnken Design model is found to be high ( R2 = 0.9737), which is an indication of good fit for the model with high significance. The percentage error for the Box–Behnken Design model is observed to be more as compared to the Levenberg–Marquardt Algorithm-based artificial neural networks model. The comparison evidently indicates that the prediction capabilities of trained artificial neural networks models are far better than the Box–Behnken Design models. Further, specimens were examined using atomic force microscopy for three-dimensional surface profiles.
- Published
- 2021
34. Levenberg-marquardt backpropagation neural network with techebycheve moments for face detection
- Author
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Nidhal K. El Abbadi, Ali Nadhim Razzaq, Rozaida Ghazali, and Hussein Ali Hussein Al Naffakh
- Subjects
Control and Optimization ,Artificial neural network ,Computer Networks and Communications ,Computer science ,business.industry ,Feature extraction ,Pattern recognition ,Image processing ,Convolution neural network ,Discrete tchebychev moments ,Face detection ,Levenberg-marquardt backpropagation ,Convolutional neural network ,Backpropagation ,Levenberg–Marquardt algorithm ,Digital image ,Hardware and Architecture ,Control and Systems Engineering ,Computer Science (miscellaneous) ,Artificial intelligence ,Electrical and Electronic Engineering ,business ,Instrumentation ,Information Systems - Abstract
Face detection is an intelligent approach used in a variety of applications that identifies human faces in digital images. This work presents a new method which composes of a neural network and Techebycheve transforms for face detection. For feature extraction, Tchebychev transform was applied, in which a discrete Tchebychev transform is given for different sampling patterns and several samples here were performed on color images. A Levenberg-Marquardt backpropagation neural network was applied to the transformed image to find faces in the face detection dataset and FDDB benchmarked database. Model performance was measured based on its accuracy and the best result from the newly proposed method was 98.9%. Simulation results showed that the proposed method handles face detection efficiently.
- Published
- 2021
35. Prediction of Motion Simulator Signals Using Time-Series Neural Networks
- Author
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Shady Mohamed, Mohammad Reza Chalak Qazani, Saeid Nahavandi, Houshyar Asadi, and Chee Peng Lim
- Subjects
Levenberg–Marquardt algorithm ,Model predictive control ,Circular motion ,Artificial neural network ,Autoregressive model ,Computer science ,Feed forward ,Aerospace Engineering ,Feedforward neural network ,Motion simulator ,Electrical and Electronic Engineering ,Algorithm - Abstract
A motion cueing algorithm (MCA) is employed to transform the linear and angular motion signals generated from a motion simulator without violating the physical and dynamical boundaries of the motion platform. In this respect, the accurate prediction of the motion scenarios is essential to enhance the efficiency of the MCA using prepositioning or time-varying reference model predictive control. While a recent approach that utilizes a feedforward neural network (NN) to forecast the motion scenarios is useful, the feedforward NN model has only forward dynamics relating to the signals without any feedback loop. In this article, a time-delay feedforward NN, a recurrent NN, and a nonlinear autoregressive (NAR) models with three different training procedures, i.e., Levenberg–Marquardt, Bayesian regularization, and scaled conjugate gradient, are exploited to predict the motion scenarios. As the NAR model employs the historical signals as the inputs, it can predict the motion scenarios with higher accuracy rates. Based on the series of empirical evaluations, NAR trained with Levenberg–Marquardt is able to outperform the other two counterparts in producing more accurate predictions of the motion signals. The NAR method has a lower computational load as compared with that of the recurrent NN, facilitating its real-time application. In addition to the MCA, the NAR method can be employed in other areas, including autonomous vehicles and motion sickness studies. It can also be easily implemented for air, sea, and/or land vehicle simulators for training purposes in virtual reality environments.
- Published
- 2021
36. Intelligent Computing with Levenberg–Marquardt Backpropagation Neural Networks for Third-Grade Nanofluid Over a Stretched Sheet with Convective Conditions
- Author
-
Zulqurnain Sabir, Imrana Farhat, Muhammad Asif Zahoor Raja, Wasim Jamshed, Kottakkaran Sooppy Nisar, Muhammad Shoaib, and Ghania Zubair
- Subjects
Multidisciplinary ,Artificial neural networks ,Biot number ,Artificial neural network ,Research Article-Mechanical Engineering ,MHD flow ,Schmidt number ,Prandtl number ,Nanofluid ,Hartmann number ,Backpropagation ,Levenberg–Marquardt algorithm ,symbols.namesake ,Levenberg–Marquardt technique ,Activation energy ,symbols ,Applied mathematics ,Mathematics - Abstract
This article discussed the influence of activation energy on MHD flow of third-grade nanofluid model (MHD-TGNFM) along with the convective conditions and used the technique of backpropagation in artificial neural network using Levenberg–Marquardt technique (BANN-LMT). The PDEs representing (MHD-TGNFM) transformed into the system of ODEs. The dataset for BANN-LMT is computed for the six scenarios by using the Adam numerical method by varying the local Hartman number (Ha), Prandtl number (Pr), local chemical reaction parameter (σ), Schmidt number (Sc), concentration Biot number (γ2) and thermal Biot number (γ1). By testing, validation and training process of (BANN-LMT), the estimated solutions are interpreted for (MHD-TGNFM). The validation of the performance of (BANN-LMT) is done through the MSE, error histogram and regression analysis. The concentration profile increases when there is an increase in Biot number and the local Hartmann number; meanwhile, it decreases for the higher values of Schmidt number and the local chemical reaction parameter.
- Published
- 2021
37. Metaheuristic optimization of Levenberg–Marquardt-based artificial neural network using particle swarm optimization for prediction of foamed concrete compressive strength
- Author
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Hai-Bang Ly, Binh Thai Pham, and May Huu Nguyen
- Subjects
Soft computing ,Levenberg–Marquardt algorithm ,Reduction (complexity) ,Compressive strength ,Artificial neural network ,Correlation coefficient ,Mean squared error ,Artificial Intelligence ,Computer science ,Particle swarm optimization ,Algorithm ,Software - Abstract
Foamed concrete (FC) shows advantageous applications in civil engineering, such as reduction in dead loads, contribution to energy conservation, or decrease the construction phase labor cost. Compressive Strength is considered the most important factor in terms of FC mechanical properties. In recent years, Artificial Neural Network (ANN) is one of popular and effective machine learning models, which can be used to accurately predict the FCCS. However, ANN’s structure and parameters are normally chosen by experience. In this study, therefore, the objective is to use particle swarm optimization (PSO) metaheuristic optimization (one of the effective soft computing techniques) to optimize the parameters and structure of a Levenberg–Marquardt-based Artificial Neural Network (LMA-ANN) for accurate and quick prediction of the FCCS. A total of 375 data of experiments on FC gathered from the available literature were used to generate the training and testing datasets. Various validation criteria such as mean absolute error, root mean square error, and correlation coefficient (R) were used for the validation of the models. The results showed that the PSO-LMA-ANN algorithm is a highly efficient predictor of the FCCS, achieving the highest value of R up to 0.959 with the optimized [5-7-6-1] structure. An interpretation of the mixture components and the FCCS using Partial Dependence Plots was also performed to understand the effect of each input on the FCCS. The dry density was the most important parameter for the prediction of FCCS, followed by the water/cement ratio, foam volume, sand/cement ratio, and the testing age. The results of the present work might help in accurate and quick prediction of the FCCS and the design optimization process of the FC.
- Published
- 2021
38. The atmospheric model of neural networks based on the improved Levenberg-Marquardt algorithm
- Author
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Min Jiang, Wei Qu, Wenhui Cui, and Gang Yao
- Subjects
Artificial neural network ,atmospheric model ,Computer science ,Astronomy ,Astronomy and Astrophysics ,QB1-991 ,Atmospheric model ,neural networks ,Levenberg–Marquardt algorithm ,Space and Planetary Science ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Algorithm ,Physics::Atmospheric and Oceanic Physics ,improved levenberg-marquardt algorithm - Abstract
Traditional atmospheric models are based on the analysis and fitting of various factors influencing the space atmosphere density. Neural network models do not specifically analyze the polynomials of each influencing factor in the atmospheric model, but use large data sets for network construction. Two traditional atmospheric model algorithms are analyzed, the main factors affecting the atmospheric model are identified, and an atmospheric model based on neural networks containing various influencing factors is proposed. According to the simulation error, the Levenberg-Marquardt algorithm is used to iteratively realize the rapid network weight correction, and the optimal neural network atmospheric model is obtained. The space atmosphere is simulated and calculated with an atmospheric model based on neural networks, and its average error rate is lower than that of traditional atmospheric models such as the DTM2013 model and the MSIS00 model. At the same time, the calculation complexity of the atmospheric model based on the neural networks is significantly simplified than that of the traditional atmospheric model.
- Published
- 2021
39. Performance prediction of pneumatic conveying of powders using artificial neural network method
- Author
-
J S Shijo and Niranjana Behera
- Subjects
Pressure drop ,Artificial neural network ,General Chemical Engineering ,Flow (psychology) ,Margin of error ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,Levenberg–Marquardt algorithm ,020401 chemical engineering ,Conjugate gradient method ,Performance prediction ,Particle ,0204 chemical engineering ,0210 nano-technology ,Mathematics - Abstract
This paper studies the ability of the ANN to predict the pneumatic conveying performance of powders. At high air velocity, the flow is dilute. But at low air velocities it is fluidized dense. Fluidized dense flow involves several complex interactions among gas, particle and wall. But in dilute flow, the particle-particle interaction is less. Implementation of these interactions in a model is difficult. Experimental data available for pneumatic conveying were used to train the network and then predict the pressure drop. Three different training methods Levenberg Marquardt, Bayesian Regularization and Scaled Conjugate Gradient are used. The BR method takes more time for analysis, but it gives better results than others when sample size is small and noisy. For larger sample size the LM method gives better results than the other two methods. The model is also predicts the pressure drop within ±10% error margin under length scale-up conditions.
- Published
- 2021
40. Modeling biohydrogen production using different data driven approaches
- Author
-
Jiangang Ling, Jun He, Yunshan Wang, Huan Jin, Yixiao Wang, Yiyang Liu, Yong Sun, and Mingzhu Tang
- Subjects
Artificial neural network ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Experimental data ,Dark fermentation ,Condensed Matter Physics ,Data-driven ,Levenberg–Marquardt algorithm ,Fuel Technology ,Multilayer perceptron ,Biohydrogen ,Biochemical engineering ,Response surface methodology ,Mathematics - Abstract
Three modeling techniques namely multilayer perceptron artificial neural network (MLPANN), microbial kinetic with Levenberg-Marquardt algorithm (MKLMA) developed from microbial growth, and the response surface methodology (RSM) were used to investigate the biohydrogen (BioH2) process. The MLPANN and MKLMA were used to model the kinetics of major metabolites during the dark fermentation (DF). The MLPANN and RSM were deployed to model the electron-equivalent balance (EEB) from the cumulative data (after 24 h fermentation) during the DF. With the additional experimental results of kinetic data (20 × 10) and cumulative data (18 × 9), the uncertainties of different models were compared. A new effective strategy for modeling the complex BioH2 process during the DF is proposed: MLPANN and MKLMA are used for the investigation of kinetics of the major metabolites from the limited numbers of experimental data set, and the MLPANN and RSM are used for statistical analysis of the investigated operational parameters upon the major metabolites through EEB perspective. The proposed strategy is a useful and practical paradigm in modeling and optimizing the BioH2 production during the dark fermentation.
- Published
- 2021
41. <scp>Levenberg‐Marquardt</scp> backpropagation algorithm for parameter identification of solid oxide fuel cells
- Author
-
Zhengxun Guo, Bo Yang, Jingbo Wang, Ting Fu, Hongchun Shu, Xiaoshun Zhang, Danyang Li, Chunyuan Zeng, Yijun Chen, and Jieshan Shan
- Subjects
Artificial neural network ,Renewable Energy, Sustainability and the Environment ,Computer science ,Oxide ,Energy Engineering and Power Technology ,Backpropagation ,Levenberg–Marquardt algorithm ,Identification (information) ,chemistry.chemical_compound ,Fuel Technology ,Nuclear Energy and Engineering ,chemistry ,Optimization methods ,Fuel cells ,Solid oxide fuel cell ,Biological system - Published
- 2021
42. Computational intelligence approach using Levenberg–Marquardt backpropagation neural networks to solve the fourth-order nonlinear system of Emden–Fowler model
- Author
-
Mohamed R. Ali, Zulqurnain Sabir, Rafaél Artidoro Sandoval Núñez, Muhammad Shoaib, R. Sadat, and Muhammad Asif Zahoor Raja
- Subjects
Correctness ,Mean squared error ,Artificial neural network ,Computer science ,0211 other engineering and technologies ,General Engineering ,Computational intelligence ,02 engineering and technology ,Singular point of a curve ,Backpropagation ,Computer Science Applications ,Levenberg–Marquardt algorithm ,Nonlinear system ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Modeling and Simulation ,Algorithm ,Software ,021106 design practice & management - Abstract
The present investigations are related to design an integrated computing numerical approach through Levenberg–Marquardt backpropagation (LMB) neural networks (NNs), i.e., LMB-NNs. The designed LMB-NNs approach is presented to solve the fourth-order nonlinear system of Emden–Fowler model (FO-SEFM). The solution of six different examples based on the FO-SEFM using the designed methodology LMB-NNs is numerically treated along with the discussion of singular point and shape factor. The comparison of the obtained results from the LMB-NNs and the exact solutions of each example has been presented. To evaluate the approximate results of the FO-SEFM for different problems, the testing, training, and authentication procedures are accompanied to adapt the NNs by reducing the functions of mean square error (MSE) through the LMB. The proportional investigations and performance studies based on the results of error histograms, MSE, regression, and correlation establish the effectiveness and correctness of the designed LMB-NNs approach.
- Published
- 2021
43. Parameter identification of proton exchange membrane fuel cell via Levenberg-Marquardt backpropagation algorithm
- Author
-
Bo Yang, Zhengxun Guo, Pulin Cao, Danyang Li, Jiawei Zhu, Tao Yu, Hongchun Shu, Yijun Chen, Long Wang, Guanghua Chen, Yinyuan Guo, and Chunyuan Zeng
- Subjects
Artificial neural network ,Renewable Energy, Sustainability and the Environment ,Computer science ,Energy Engineering and Power Technology ,Proton exchange membrane fuel cell ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Backpropagation ,0104 chemical sciences ,Levenberg–Marquardt algorithm ,Identification (information) ,Nonlinear system ,Fuel Technology ,Control theory ,Convergence (routing) ,Strong coupling ,0210 nano-technology - Abstract
It is essential to develop an accurate model of proton exchange membrane fuel cell (PEMFC) for a reliable operation and analysis, in which unknown parameters usually need to be determined. The inherent nonlinear, strong coupling, and diversification of PEMFC model seriously hinder traditional methods to identify the parameters. For the sake of overcoming these thorny obstacles, Levenberg-Marquardt backpropagation (LMBP) algorithm based on artificial neural networks (ANNs) is proposed for PEMFC parameter identification. Furthermore, the performance of LMBP is thoroughly evaluated and compared with four typical meta-heuristic algorithms under three cases. Simulation results indicate that LMBP performs a higher accuracy and faster speed for parameter identification. In particular, accuracy and convergence speed can achieve as much as 99.8% and 95.9% growth via LMBP, respectively.
- Published
- 2021
44. IDEA: Artificial neural network models for 11-species air properties at thermochemical equilibrium.
- Author
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You, Hojun, Kim, Juhyun, Yune, Kyeol, and Kim, Chongam
- Subjects
- *
THERMODYNAMICS , *PROGRAMMING languages , *COMPUTATIONAL fluid dynamics , *MEAN square algorithms , *EQUILIBRIUM , *ARTIFICIAL neural networks - Abstract
Accurate prediction of high-temperature air properties is essential in many aerodynamic applications under hypersonic flight conditions. Various curve-fit models using piecewise polynomial fittings have been commonly adopted to approximate equilibrium air properties at high temperatures. Several shortcomings including low accuracy, lack of diversity, and discontinuity at curve-fit boundary still remain, causing numerical troubles in computational procedures. To address the issues, IDEA, an open-source C++ library that enables fast and accurate computations of the equilibrium air properties and their first and second derivatives, is newly developed based on the artificial neural network (ANN). IDEA, which stands for the Infinitely Differentiable Equilibrium Air, predicts thermodynamic and transport properties of 11-species (N 2 , O 2 , N, O, NO, N O + , N + , O + , N + + , O + + , and e −) thermochemical equilibrium air at the temperature range up to 25,000 K and density range from 10 − 7 to 103 amagats. The training data is constructed from the kinetic molecular theory using the equilibrium constant method with the rigid-rotor, harmonic-oscillator model. As the name suggests, IDEA's models are infinitely differentiable in the application range; thus, they have enhanced convergence in computational fluid dynamics (CFD) when using gradient-based methods. Using a newly developed training process based on the Levenberg–Marquardt algorithm with weighted mean squared error loss, IDEA provides more accurate and diverse property models with much fewer parameters than previous piecewise polynomial fitting models. In addition, the proposed training method offers easy extensions to various property models with different species data. IDEA provides C interfaces that can be used for programs in various computer languages, such as C/C++, Fortran, Python, and MATLAB. IDEA's modeling routines are thread-safe, so they can be safely used for parallel programs without performance loss. The accuracy and enhanced convergence of IDEA is demonstrated via several high-speed flow computations Program title: IDEA CPC library link to program files: https://doi.org/10.17632/84rhtfz9n2.1 Developers' repository link: https://github.com/HojunYouKr/IDEA Licensing provisions: BSD-3-Clause Programming language: C++11 Nature of problem: Accurate prediction of equilibrium air properties is essential in many aerodynamic applications under hypersonic flight conditions. Direct calculation of air properties by the kinetic molecular theory requires time-consuming iterative methods to solve nonlinear equations of species concentrations. Various piecewise polynomial models have been developed to avoid such iterations. However, the regression error of the polynomial models requires improvement, and the lack of diversity of the polynomial models makes iterative computations inevitable, causing computational inefficiency. Furthermore, these polynomial models are not continuously differentiable, which deteriorates the convergence characteristics of computational fluid dynamics (CFD) solvers. Solution method: ANN is chosen to model the equilibrium properties of air owing to its excellent capability as a universal function approximator and better adaptability to a large dataset than kernel methods. The hyperbolic tangent activation function makes the ANN model infinitely differentiable, which enables to use a superlinear training process and thus improves convergence characteristics. The newly proposed superlinear training process based on the Levenberg–Marquardt algorithm with weighted mean squared error loss provides more accurate and diverse property models with much fewer parameters than the existing polynomial models. As a result, the proposed ANN model is completely free from iterative computations. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
45. Performance Analysis of Traffic Congestion Using Designated Neural Network Training Algorithms
- Author
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Joseph Femi Odesanya and Ituabhor Odesanya
- Subjects
0209 industrial biotechnology ,Artificial neural network ,Computer science ,business.industry ,Training (meteorology) ,02 engineering and technology ,General Medicine ,010501 environmental sciences ,01 natural sciences ,Bayesian interpretation of regularization ,Levenberg–Marquardt algorithm ,020901 industrial engineering & automation ,Traffic congestion ,Artificial intelligence ,business ,0105 earth and related environmental sciences - Abstract
A lot of neural network training algorithms on prediction exist and these algorithms are being used by researchers to solve evaluation, forecasting, clustering, function approximation etc. problems in traffic volume congestion. This study is aimed at analysing the performance of traffic congestion using some designated neural network training algorithms on traffic flow in some selected corridors within Akure, Ondo state, Nigeria. The selected corridors were Oba Adesida road, Oyemekun road and Oke Ijebu road all in Akure. The traffic flow data were collected manually with the help of field observers who monitored and record traffic movement along the corridors. To accomplish this, three common training algorithms were selected to train the traffic flow data. The data were trained using Bayesian Regularization (BR), Scaled Conjugate Gradient (SCG) and Levenberg-Marquardt (LM) training algorithms. The outputs/performances of these training functions were evaluated by using the Mean Square Error (MSE) and Coefficient of Regression (R) to find the best training algorithms. The results show that, the Bayesian regularization algorithm, performs better with MSE of 2.37e-13 and R of 0.9999 than SCG and LM algorithms.
- Published
- 2021
46. Nonlinear Neural Network Based Forecasting Model for Predicting COVID-19 Cases
- Author
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Suyel Namasudra, S. Dhamodharavadhani, and R. Rathipriya
- Subjects
0209 industrial biotechnology ,Mean squared error ,Computer Networks and Communications ,Computer science ,Computational intelligence ,02 engineering and technology ,Machine learning ,computer.software_genre ,Article ,Training algorithm ,Levenberg Marquardt ,020901 industrial engineering & automation ,Artificial Intelligence ,Conjugate gradient method ,0202 electrical engineering, electronic engineering, information engineering ,Scaled conjugate gradient ,Artificial neural network ,business.industry ,General Neuroscience ,Regression ,Levenberg–Marquardt algorithm ,Nonlinear system ,Autoregressive model ,Bayesian regularization ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,computer ,Software ,Forecasting - Abstract
The recent COVID-19 outbreak has severely affected people around the world. There is a need of an efficient decision making tool to improve awareness about the spread of COVID-19 infections among the common public. An accurate and reliable neural network based tool for predicting confirmed, recovered and death cases of COVID-19 can be very helpful to the health consultants for taking appropriate actions to control the outbreak. This paper proposes a novel Nonlinear Autoregressive (NAR) Neural Network Time Series (NAR-NNTS) model for forecasting COVID-19 cases. This NAR-NNTS model is trained with Scaled Conjugate Gradient (SCG), Levenberg Marquardt (LM) and Bayesian Regularization (BR) training algorithms. The performance of the proposed model has been compared by using Root Mean Square Error (RMSE), Mean Square Error (MSE) and correlation co-efficient i.e. R-value. The results show that NAR-NNTS model trained with LM training algorithm performs better than other models for COVID-19 epidemiological data prediction.
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- 2021
47. Balanced Gradient Training of Feed Forward Networks
- Author
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Son Nguyen and Michael T. Manry
- Subjects
0209 industrial biotechnology ,Artificial neural network ,Computer Networks and Communications ,business.industry ,Computer science ,General Neuroscience ,Deep learning ,MathematicsofComputing_NUMERICALANALYSIS ,Feed forward ,Computational intelligence ,02 engineering and technology ,Convolutional neural network ,Levenberg–Marquardt algorithm ,020901 industrial engineering & automation ,Artificial Intelligence ,Conjugate gradient method ,Scalability ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,Algorithm ,Software - Abstract
We show that there are infinitely many valid scaled gradients which can be used to train a neural network. A novel training method is proposed that finds the best scaled gradients in each training iteration. The method’s implementation uses first order derivatives which makes it scalable and suitable for deep learning and big data. In simulations, the proposed method has similar or less testing error than conjugate gradient and Levenberg Marquardt. The method reaches the final network utilizing fewer multiplies than the other two algorithms. It also works better than conjugate gradient in convolutional neural networks.
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- 2021
48. Application of Nonlinear Autoregressive Neural Network to Model and Forecast Time Series Global Price of Bananas
- Author
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Orson Chi and Yeong Nain Chi
- Subjects
Levenberg–Marquardt algorithm ,Nonlinear system ,Mean squared error ,Artificial neural network ,Series (mathematics) ,Autoregressive model ,Order (exchange) ,Computer science ,Value (economics) ,Statistics ,General Earth and Planetary Sciences ,General Environmental Science - Abstract
The primary purpose of this study was to apply the nonlinear autoregressive neural network to model the long-term records of monthly global price of bananas from January 1990 to November 2020. The development of the optimal architecture for the nonlinear autoregressive neural network requires determination of time delays, the number of hidden neurons, and an efficient training algorithm. Through training of the nonlinear autoregressive neural network models, the prediction performance of the models was evaluated by its mean squared error value, the average squared difference between the observed and predicted values. In this study, the empirical results revealed that the NAR-BR model with 13 neurons in the hidden layer and 6 time delays provided the best performance at its smaller mean squared error value and yielded higher accuracy than the NAR-LM model with 12 neurons in the hidden layer and 4 time delays and NAR-SCG model with 12 neurons in the hidden layer and 6 time delays. Understanding past global price of bananas is important for the analyses of current and future global price of bananas changes. In order to sustain these observations, research programs utilizing the resulting data should be able to improve our understanding and narrow projections of future global price of bananas significantly.
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- 2021
49. A cumulative-risk assessment method based on an artificial neural network model for the water environment
- Author
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Miao Zhang, Shang Yanchen, En Shi, and Li Yafeng
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Artificial neural network ,Correlation coefficient ,Mean squared error ,Health, Toxicology and Mutagenesis ,Water ,Risk management tools ,General Medicine ,010501 environmental sciences ,Risk Assessment ,01 natural sciences ,Pollution ,Backpropagation ,Water Purification ,Levenberg–Marquardt algorithm ,Statistics ,Water environment ,Environmental Chemistry ,Environmental science ,Neural Networks, Computer ,Sensitivity (control systems) ,Algorithms ,0105 earth and related environmental sciences - Abstract
To analyze the cumulative risks to the water environment, the backpropagation artificial neural network (BP-ANN), a self-adapting algorithm, was proposed in this study. A new comprehensive indicator of cumulative risks was formed by combining the water risk assessment tool proposed by the World Wide Fund for Nature or World Wildlife Fund (WWF), Deutsche Investitions und Entwicklungsgesellschaft mbH (DEG), and the cumulative environmental risk assessment system proposed by the US Environmental Protection Agency (USEPA). Eleven training algorithms were selected and optimized based on the mean square error (MSE) of prediction results. Data concerning evaluating indicators and cumulative risk indexes of the Liao River collected from 2005 to 2017 in the cities of Tieling, Shenyang, and Panjin, China, were used as input and output data to train, validate, and test the BP-ANN. Levenberg Marquardt backpropagation was the most accurate algorithm, with an MSE of 3.33 × 10-6. After optimization, there were six hidden layers in the model. The correlation coefficient of the BP-ANN with LM exceeded 80%. These findings suggest that the BP-ANN model is applicable to prediction of cumulative risks to the water environment. The model was sensitive to the number of wastewater treatment facilities and the wastewater treatment rate along the river. Based on the sensitivity analysis, the contributing factors can be controlled to reduce the cumulative risk.
- Published
- 2021
50. Application ofThe Levenberg Marquardt Method In Predict The Amount of Criminality in Pematangsiantar City
- Author
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Widya Tri Charisma Gultom, Muhammad Ridwan Lubis, Indra Gunawan, Anjar Wanto, and Ika Okta Kirana
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Training set ,Operations research ,Artificial neural network ,010405 organic chemistry ,Computer science ,05 social sciences ,050801 communication & media studies ,01 natural sciences ,Criminal investigation ,0104 chemical sciences ,Levenberg–Marquardt algorithm ,0508 media and communications ,Harm ,Agency (sociology) ,Architecture ,Test data - Abstract
Criminality is an act that violates the law that can disturb society and even harm society both economically and psychologically. The number of crimes cannot be ascertained over time because the numbers are uncertain. So that the police have difficulty in overcoming criminal acts. With this research, the police can find out the number of criminals that will occur through the prediction that has been made. So that the police can prevent the number of criminals and increase security in Pematangsiantar city. This study uses an artificial neural network with the Levenberg Marquardt method. The research data is sourced from the Pematangsiantar Police Criminal Investigation Agency (Reskrim) in 2014-2019. The data is divided into 2 parts, namely training data and testing data. There are 5 architectural models used in this study, namely 3-30-1, 3-31-1, 3-32-1, 3-36-1 and 3-38-1. Of the 5 architectural models used, the best architecture is 3-36-1 with an accuracy rate of 85%, MSE 0.1465119, and a maximum iteration of 10000, the results obtained from the best architecture in 2020 are 85% with the number of criminals 394 people, in 2021 it is 62 % totaled 238 people, in 2022, namely 69% amounted to 170 people, so this model is good for predicting the number of crimes in Pematangsiantar City.
- Published
- 2021
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