50 results on '"Weighted function"'
Search Results
2. Statistical approximation using wavelets Kantorovich (p,q)-Baskakov operators.
- Author
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Moreka, Alexander E., Kumar, Santosh, and Mursaleen, M.
- Subjects
- *
MAXIMAL functions - Abstract
The aim of this article is to construct a (p , q) -analogue of wavelets Kantorovich–Baskakov operators and investigate some statistical approximation properties. We study weighted statistical approximation by means of a Bohman–Korovkin-type theorem, and statistical rate of convergence by means of the weighted modulus of smoothness ω ρ α associated to the space B ρ α (ℝ +) and Lipschitz-type maximal functions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Quantitative Comparison of the Accuracy of the Third-Order Acceleration Method with Other Numerical Methods.
- Author
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Mahmoodabadi, Masoud, Hatefi, Fateme, and Ansari, Fateme
- Abstract
The basic assumption of the 3rd order acceleration method is that the acceleration changes in the time interval Δt is in the form of a third degree polynomial. To quantitatively compare the error rate of this method with other numerical methods, a linear one-degree-of-freedom system was considered. Then, sinusoidal harmonic loading with a specific frequency was applied to this system. Using numerical methods of second-order acceleration and third-order acceleration and other numerical methods and using the root mean square criterion, the errors of different methods were quantitatively calculated and compared with each other. Also, 3rd degree polynomials were obtained for the trends of error changes in terms of time step and damping, which had a very good correlation with its real values.. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. 复杂背景下改进的红外弱小目标检测.
- Author
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周梦蝶 and 黄昶
- Abstract
Recently, the field of infrared dim small target detection is paid considerable attention and various solutions are proposed. However, the problem of detection in complex background is unsolved. Clutter in complex backgrounds is difficult to eliminate, and significant results are difficult to obtain in target detection. For this reason, an improved algorithm, high-boost weighted tri-Layer local contrast measure (HB-WTLLCM) was proposed, which enhance the target detection in complex background, and to improve the detection rate. An improved high boost filter was designed in this algorithm to preprocessed the original infrared image. Then the tri-layer window was used for enhancing the local contrast. Finally, a weighted algorithm based on complexity evaluation was introduced for further target enhancement and random noise suppression. Experimental results show that, compared with mainstream algorithms, the proposed algorithm is stronger in target enhancement and improves detection rate under complex background of multiple buildings and trees. It is suggested that the HB-WTLLCM algorithm proposed in this paper can detect infrared dim and small targets well in complex background. [ABSTRACT FROM AUTHOR]
- Published
- 2023
5. Analysis of the Theory and Traffic Scheduling for Transit Network by Genetic Algorithm-Based Optimization Technique
- Author
-
Xuan Wang
- Subjects
optimization ,traffic scheduling ,transit network ,weighted function ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
This work utilizes the transit network, which aims to combine the genetic algorithm for analyzing the theory and traffic scheduling based on the traditional methodology. The dynamic methodology is used to schedule the model of transit system, which aims to optimize the demand in the transit network. This model illustrates the methodology of the genetic based transit network (GATN) algorithm to enhance the primary challenges in the transit network. The proposed methodology provides to be significant, with minimizing the objective model of around 27.2%. The model significantly managed to lower the total routes available in the transit network and all travelers related to the time and the transit trip from the initial stage. The significant system obtained using the optimization methodology has 180 routes, 110 less than the initial network, which has a variation by different transit network. This final transmission has been minimized to 33.6% by the proposed methodology in the transit network length and 4.1% reduction in the transfer average. The transition obtained from the multi-level objective function to unique optimization that considers the weighted function proved to be effective.
- Published
- 2023
- Full Text
- View/download PDF
6. Underwater Acoustic Channel Estimation via an Orthogonal Matching Pursuit Algorithm Based on the Modified Phase-Transform-Weighted Function.
- Author
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Hu, Xueru, Zhang, Lanyue, Wu, Di, and Wang, Jia
- Subjects
ORTHOGONAL matching pursuit ,CHANNEL estimation ,TIME delay estimation ,STANDARD deviations ,PARAMETER estimation ,ALGORITHMS - Abstract
In the context of torpedo guidance systems, the performance of active sonar in channel parameter estimation and target detection and recognition is significantly degraded by the multipath effect and the time-varying characteristics of the underwater acoustic (UWA) channel. Therefore, it is urgent to propose an algorithm that can accurately estimate the channel parameters in multipath time-varying UWA channels. To solve these problems, this study developed a modified phase transform (PHAT)-weighted function and applied it to the orthogonal matching pursuit (OMP) algorithm, named M-PHAT-OMP. The proposed algorithm is more robust, improves the resolution of the time delay and further improves the estimation accuracy of the parameters in the case of motion. Furthermore, with the aim of solving the problem of the difficulty that the traditional OMP algorithm has in determining sparsity, this study proposes a joint-threshold method, where the threshold value serves as the condition for terminating the algorithm's iteration. The simulation results demonstrate that the M-PHAT-OMP algorithm proposed in this study exhibits a superior performance compared to other algorithms, as evidenced by its lower root mean square error (RMSE) for delay. Moreover, the experimental results also validate that the proposed algorithm has superior robustness and resolution of the time delay in practical applications. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
7. SOME WEIGHTED SIMPSON-LIKE TYPE INEQUALITIES FOR DIFFERENTIABLE β-PREINVEX FUNCTIONS.
- Author
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Bahloul, Hayet, Hamida, Salim, Meftah, Badreddine, and Djebabla, Abelhak
- Subjects
- *
DIFFERENTIABLE functions - Abstract
In this paper, we first prove a new identity based on which we have established some weighted Simpson-type inequalities for functions whose first derivatives are beta-preinvex. Some applications of our finding are proposed. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
8. Blow-Up Analysis for Heat Equation with a Nonlocal Weighted Exponential Boundary Flux.
- Author
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Huo, Wentao and Fang, Zhong Bo
- Abstract
This paper is concerned with the blow-up phenomenon for classical heat equation with a nonlocal weighted exponential boundary flux. Based on the method of super- and sub-solutions, Kaplan's argument, the Bernoulli's techniques and modified differential inequality, we analyze the influence of the weighted function and the nonlocal exponential boundary flux on the solution exists globally or blows up in finite time. Moreover, the life span bounds of blow-up solutions are derived under appropriate measure, and some examples for application are presented. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
9. Research on singular Sturm–Liouville spectral problems with a weighted function
- Author
-
Shuning Tang
- Subjects
Singular Sturm–Liouville problems ,Limiting point and limiting circle ,Weyl function ,Weighted function ,Analysis ,QA299.6-433 - Abstract
Abstract As early as 1910, Weyl gave a classification of the singular Sturm–Liouville equation, and divided it into the Limit Point Case and the Limit Circle Case at infinity. This led to the study of singular Sturm–Liouville spectrum theory. With the development of applications, the importance of singular Sturm–Liouville problems with a weighted function becomes more and more significant. This paper focuses on the study of singular Sturm–Liouville problems with a weighted function. Finally, an example of singular Sturm–Liouville problems with a weighted function is given.
- Published
- 2022
- Full Text
- View/download PDF
10. Identifying talent: public organisation with skewed performance scores
- Author
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Siswanto, Joko, Cahyono, Edi, Monang, Joe, Aisha, Atya Nur, and Mulyadi, Dedi
- Published
- 2021
- Full Text
- View/download PDF
11. Underwater Acoustic Channel Estimation via an Orthogonal Matching Pursuit Algorithm Based on the Modified Phase-Transform-Weighted Function
- Author
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Xueru Hu, Lanyue Zhang, Di Wu, and Jia Wang
- Subjects
sparse-channel estimation ,frequency estimation ,weighted function ,modified PHAT-weighted orthogonal matching pursuit algorithm (M-PHAT-OMP) ,Naval architecture. Shipbuilding. Marine engineering ,VM1-989 ,Oceanography ,GC1-1581 - Abstract
In the context of torpedo guidance systems, the performance of active sonar in channel parameter estimation and target detection and recognition is significantly degraded by the multipath effect and the time-varying characteristics of the underwater acoustic (UWA) channel. Therefore, it is urgent to propose an algorithm that can accurately estimate the channel parameters in multipath time-varying UWA channels. To solve these problems, this study developed a modified phase transform (PHAT)-weighted function and applied it to the orthogonal matching pursuit (OMP) algorithm, named M-PHAT-OMP. The proposed algorithm is more robust, improves the resolution of the time delay and further improves the estimation accuracy of the parameters in the case of motion. Furthermore, with the aim of solving the problem of the difficulty that the traditional OMP algorithm has in determining sparsity, this study proposes a joint-threshold method, where the threshold value serves as the condition for terminating the algorithm’s iteration. The simulation results demonstrate that the M-PHAT-OMP algorithm proposed in this study exhibits a superior performance compared to other algorithms, as evidenced by its lower root mean square error (RMSE) for delay. Moreover, the experimental results also validate that the proposed algorithm has superior robustness and resolution of the time delay in practical applications.
- Published
- 2023
- Full Text
- View/download PDF
12. H∞ Mixed Sensitivity Robust Control of Lateral Train Vibration
- Author
-
Xue, Xiusheng, Lin, Yuan, Ji, Jiaxin, Wu, Baogui, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Liu, Baoming, editor, Liu, Zhigang, editor, Diao, Lijun, editor, and An, Min, editor
- Published
- 2020
- Full Text
- View/download PDF
13. Research on singular Sturm–Liouville spectral problems with a weighted function.
- Author
-
Tang, Shuning
- Subjects
- *
STURM-Liouville equation - Abstract
As early as 1910, Weyl gave a classification of the singular Sturm–Liouville equation, and divided it into the Limit Point Case and the Limit Circle Case at infinity. This led to the study of singular Sturm–Liouville spectrum theory. With the development of applications, the importance of singular Sturm–Liouville problems with a weighted function becomes more and more significant. This paper focuses on the study of singular Sturm–Liouville problems with a weighted function. Finally, an example of singular Sturm–Liouville problems with a weighted function is given. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
14. Weighted Metric on Fuzzy Numbers
- Author
-
Liu, Hao-Yue, Fan, Tai-He, Kacprzyk, Janusz, Series editor, Fan, Tai-He, editor, Chen, Shui-Li, editor, Wang, San-Min, editor, and Li, Yong-Ming, editor
- Published
- 2017
- Full Text
- View/download PDF
15. Aggregation of partial T-indistinguishability operators and partial pseudo–metrics.
- Author
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Calvo Sánchez, Tomasa and Fuster-Parra, Pilar
- Subjects
- *
OPERATOR functions , *TRIANGULAR norms - Abstract
In this contribution we address our attention on the aggregation of partial T -indistinguishability operators (relations) and partial pseudo-metrics. A characterization of those functions that allow to merge a collection of partial T –indistinguishability operators into a new one was provided by Calvo et al. in [10] by means of (T , T M) -tuples, but here we present another characterization in terms of (+ , max ) -tuples. Also, we analyze the aggregation of a collection (E i) i = 1 n of partial T i -indistinguishability operators. Moreover, we provide that a generalized inter–exchange composition functions condition is a sufficient condition to guarantee that a function merges partial T i -indistinguishability operators into a single one. In addition, we give different expressions of those aggregation functions that are object of our study, most of them are defined by means of the additive generators of the corresponding t-norms and another particular function. We see that the functions, that merge partial S -pseudo-metrics into a new one, are related to the functions that aggregate partial pseudo-metrics. Finally, we show the relation between the functions, that merge partial T -indistinguishability operators and the functions that preserve the partial T ⁎ -pseudo-metrics in the aggregation process. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
16. Method for obtaining high-resolution velocity spectrum based on weighted similarity.
- Author
-
Xu, Xing-Rong, Su, Qin, Xie, Jun-Fa, Wang, Jing, Kou, Long-Jiang, and Liu, Meng-Li
- Subjects
- *
SEISMIC wave velocity , *VELOCITY , *SEISMIC waves , *ACTION spectrum , *SINGULAR value decomposition - Abstract
Seismic wave velocity is one of the most important processing parameters of seismic data, which also determines the accuracy of imaging. The conventional method of velocity analysis involves scanning through a series of equal intervals of velocity, producing the velocity spectrum by superposing energy or similarity coefficients. In this method, however, the sensitivity of the semblance spectrum to change of velocity is weak, so the resolution is poor. In this paper, to solve the above deficiencies of conventional velocity analysis, a method for obtaining a high-resolution velocity spectrum based on weighted similarity is proposed. By introducing two weighting functions, the resolution of the similarity spectrum in time and velocity is improved. Numerical examples and real seismic data indicate that the proposed method provides a velocity spectrum with higher resolution than conventional methods and can separate cross reflectors which are aliased in conventional semblance spectrums; at the same time, the method shows good noise-resistibility. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
17. Underwater Acoustic Channel Estimation via an Orthogonal Matching Pursuit Algorithm Based on the Modified Phase-Transform-Weighted Function
- Author
-
Wang, Xueru Hu, Lanyue Zhang, Di Wu, and Jia
- Subjects
sparse-channel estimation ,frequency estimation ,weighted function ,modified PHAT-weighted orthogonal matching pursuit algorithm (M-PHAT-OMP) - Abstract
In the context of torpedo guidance systems, the performance of active sonar in channel parameter estimation and target detection and recognition is significantly degraded by the multipath effect and the time-varying characteristics of the underwater acoustic (UWA) channel. Therefore, it is urgent to propose an algorithm that can accurately estimate the channel parameters in multipath time-varying UWA channels. To solve these problems, this study developed a modified phase transform (PHAT)-weighted function and applied it to the orthogonal matching pursuit (OMP) algorithm, named M-PHAT-OMP. The proposed algorithm is more robust, improves the resolution of the time delay and further improves the estimation accuracy of the parameters in the case of motion. Furthermore, with the aim of solving the problem of the difficulty that the traditional OMP algorithm has in determining sparsity, this study proposes a joint-threshold method, where the threshold value serves as the condition for terminating the algorithm’s iteration. The simulation results demonstrate that the M-PHAT-OMP algorithm proposed in this study exhibits a superior performance compared to other algorithms, as evidenced by its lower root mean square error (RMSE) for delay. Moreover, the experimental results also validate that the proposed algorithm has superior robustness and resolution of the time delay in practical applications.
- Published
- 2023
- Full Text
- View/download PDF
18. A weighted and distributed algorithm for multi-hop localization.
- Author
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Cota-Ruiz, Juan, Gonzalez-Landaeta, Rafael, Diaz-Roman, Jose David, Mederos-Madrazo, Boris, and Sifuentes, Ernesto
- Subjects
- *
STANDARD deviations , *WIRELESS sensor networks , *POSITION sensors - Abstract
Multi-hop wireless sensor networks are widely used in many location-dependent applications. Most applications assume the knowledge of geographic location of sensor nodes; however, in practical scenarios, the high accuracy on position estimates of sensor nodes is still a great challenge. In this research, we propose a hop-weighted scheme that can be useful in distance-based distributed multi-hop localization. The hop-weighted localization approach generates spatial locations around position estimates of unknown sensors and computes local functions that minimize distance errors among hop-weighted and static neighboring sensors. The iterative process of each unknown sensor to re-estimate its own location allows a significant reduction of initial position estimates. Simulations demonstrate that this weighted localization approach, when compared with other schemes, can be suitable to be used as a refinement stage to improve localization in both isotropic and anisotropic networks. Also, under rough initial position estimates, the proposed algorithm achieves root mean square error values less than the radio range of unknown sensors, in average, with only a few iterations. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
19. A Modified Weighted Fuzzy Time Series Model for Forecasting Based on Two-Factors Logical Relationship.
- Author
-
Abhishekh and Kumar, Sanjay
- Subjects
TIME series analysis ,FUZZY systems ,FUZZY logic ,FUZZY sets ,FUZZY numbers - Abstract
In this paper, we present a modified weighted fuzzy time series model for forecasting based on two-factors fuzzy logical relationship groups. The proposed method define a new technique to partition the universe of discourse into different length of intervals to different factors. Also, the proposed method fuzzifies the historical data sets of the main factor and second factor to their maximum membership grades, obtained by their corresponding triangular fuzzy sets and further constructs the fuzzy logical relationship groups which is based on the two factors to increase in the forecasting accuracy rates. This study also introduces a new defuzzification technique based on the weighted function define on two-factors fuzzy logical relationship groups. The implementation of the proposed method is verified in forecasting on Bombay stock exchange Sensex historical data and compares the forecasted accuracy rate in terms of root mean square and average forecasting error which indicates that the proposed method can achieve more accurate forecasted output over the existing models on fuzzy time series. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
20. Combination of wavelet transform and singular value decomposition-based contrast enhancement technique for target detection in UAV reconnaissance thermal images.
- Author
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Thillainayagi, R. and Senthil Kumar, K.
- Subjects
- *
INFRARED imaging , *RECONNAISSANCE operations , *DRONE aircraft , *WEIGHTED graphs , *WAVELET transforms - Abstract
In Aerial surveillance, thermal images acquired by unmanned aerial vehicle (UAV) are greatly affected due to various external interferences, which results in a low contrast image. Widely used conventional contrast enhancement methods such as histogram equalization and dynamic range partitioning techniques suffer from severe brightness changes and reduced sharpness, which in turn fail to preserve the edge details of the image. Thus for efficient target detection, it is essential to develop effective thermal infrared image contrast and edge enhancement technique. In this paper, wavelet transform (WT) and singular value decomposition (SVD)-based image enhancement technique is attempted for the target detection using thermal images captured by UAV. The discrete wavelet transform (DWT), stationary wavelet transform (SWT) and SVD are used for texture feature enhancement, edge enhancement and illumination correction, respectively. The experimental results show that the proposed technique yields higher entropy (6.7485), EMEE (2.1212), MSSIM (0.8719) and lower AMBE (21.9049) values when compared to other existing techniques. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
21. A Family of Robust M-Shaped Error Weighted Least Mean Square Algorithms: Performance Analysis and Echo Cancellation Application
- Author
-
Sheng Zhang, Wei Xing Zheng, Jiashu Zhang, and Hongyu Han
- Subjects
Adaptive filter ,weighted function ,steady-state analysis ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Due to the good filter performance for the non-Gaussian noise, the adaptive filters with error nonlinearities have received increasing attention recently. From the viewpoint of the weighted function, in this paper, the existing least mean square (LMS)-based adaptive algorithms with error nonlinearities are divided into three types, i.e., V-shaped, A-shaped, and M-shaped algorithms. Then, to obtain the merits of the V-shaped and A-shaped algorithms, a new family of robust M-shaped error weighted LMS algorithms is proposed. Their steady-state mean square deviation (MSD) analyses are made, which reveal the learning abilities of error nonlinearities: 1) for the V-shaped algorithm, it can achieve smaller steady state MSD for sub-Gaussian noise than that for super-Gaussian noise; 2) the A-shaped algorithm can be used more effectively for super-Gaussian noise than that for sub-Gaussian noise; and 3) the M-shaped algorithm combines the characteristics of the V-shaped and A-shaped algorithms. Furthermore, based on the proposed robust M-shaped function, a proportionate normalized robust M-shaped algorithm is presented for echo cancellation application. Finally, Monte Carlo simulations are conducted to verify the theoretical results and to demonstrate the efficiency of the proposed algorithms in different environments.
- Published
- 2017
- Full Text
- View/download PDF
22. The Evaluation of Weighted Moving Windows for Software Effort Estimation
- Author
-
Amasaki, Sousuke, Lokan, Chris, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Heidrich, Jens, editor, Oivo, Markku, editor, Jedlitschka, Andreas, editor, and Baldassarre, Maria Teresa, editor
- Published
- 2013
- Full Text
- View/download PDF
23. 一类具权函数的退化椭圆方程解的性质.
- Author
-
代丽丽 and 曹春玲
- Abstract
Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
- Full Text
- View/download PDF
24. Refining PD classification through ensemble bionic machine learning architecture with adaptive threshold based image denoising.
- Author
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Redhya, M. and Sathesh Kumar, K.
- Subjects
MACHINE learning ,IMAGE denoising ,BIONICS ,FEATURE selection ,SOFT computing - Abstract
• In this work, ensemble bionic machine learning model is proposed for the classification of Parkinson's disease (PD) from healthy controls using MR images. • Adaptive median filter along with threshold computation is used for picture denoising. Image enhancement factor (IEF), peak signal-to-noise ratio (PSNR) and Mean square error (MSE) are assessed to objectively measure the denoising effect of the given model. • The first and second order statistical features are extracted in the feature extraction stage, • Adapted fused slime salp mould (AFSSM) soft computing approach is used in feature selection. • Ebola optimized ensemble SVM, XGBoost, and Random Forest machine learning model is used for PD detection. Parkinson's disease (PD) manifests as a loss of dopamine-producing cells present in the substantia nigra region of the brain's central nervous system (CNS). The proposed model influences magnetic resonance imaging (MRI) for detection. The research paper consist of four stages: pre-processing, feature extraction, feature selection and classification. The proposed model influences MR images for detection during the pre-processing stage, composed with an adaptive median filter along with threshold computation. The primarily getting a binary image is that it reduces the complexity of the data and makes the recognition and classification processes easier. To reduce the training period, reducing over fitting and enhancing the accuracy, first and second order features are extracted. In third stage, adapted fused slime salp mould (AFSSM) soft computing approach is used in feature selection. The AFSSM give a fixed threshold for the selection process and find optimum values very rapidly. The ensemble machine learning model (SVM, Random Forest and XGBoost) is introduced along with Ebola optimisation through voting method. The proposed achieves the mean square error, peak signal-to-noise ratio and image enhancement factor values of 4.15, 39.1 and 0.92 respectively when compared with the existing filtering models like mean, Kalman, gaussian and weiner filter. Along with this, the performance measures like accuracy, sensitivity, precision, F1-score and specificity are examined and attains an outcome of 98.4%, 98.4%, 98%, 98.8% and 98.2%, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
25. Urban Building Change Detection in SAR Images Using Combined Differential Image and Residual U-Net Network
- Author
-
Lu Li, Chao Wang, Hong Zhang, Bo Zhang, and Fan Wu
- Subjects
weighted function ,color difference image ,urban building change detection ,synthetic aperture radar (SAR) ,residual U-Net ,Science - Abstract
With the rapid development of urbanization in China, monitoring urban changes is of great significance to city management, urban planning, and cadastral map updating. Spaceborne synthetic aperture radar (SAR) sensors can capture a large area of radar images quickly with fine spatiotemporal resolution and are not affected by weather conditions, making multi-temporal SAR images suitable for change detection. In this paper, a new urban building change detection method based on an improved difference image and residual U-Net network is proposed. In order to overcome the intensity compression problem of the traditional log-ratio method, the spatial distance and intensity similarity are combined to generate a weighting function to obtain a weighted difference image. By fusing the weighted difference image and the bitemporal original images, the three-channel color difference image is generated for building change detection. Due to the complexity of urban environments and the small scale of building changes, the residual U-Net network is used instead of fixed statistical models and the construction and classifier of the network are modified to distinguish between different building changes. Three scenes of Sentinel-1 interferometric wide swath data are used to validate the proposed method. The experimental results and comparative analysis show that our proposed method is effective for urban building change detection and is superior to the original U-Net and SVM method.
- Published
- 2019
- Full Text
- View/download PDF
26. A Regularized Weighted Smoothed L0 Norm Minimization Method for Underdetermined Blind Source Separation
- Author
-
Linyu Wang, Xiangjun Yin, Huihui Yue, and Jianhong Xiang
- Subjects
image reconstruction ,nullspace measurement matrix ,regularized least squares problem ,smoothed L0-norm ,sparse signal recovery ,UBSS ,weighted function ,Chemical technology ,TP1-1185 - Abstract
Compressed sensing (CS) theory has attracted widespread attention in recent years and has been widely used in signal and image processing, such as underdetermined blind source separation (UBSS), magnetic resonance imaging (MRI), etc. As the main link of CS, the goal of sparse signal reconstruction is how to recover accurately and effectively the original signal from an underdetermined linear system of equations (ULSE). For this problem, we propose a new algorithm called the weighted regularized smoothed L 0 -norm minimization algorithm (WReSL0). Under the framework of this algorithm, we have done three things: (1) proposed a new smoothed function called the compound inverse proportional function (CIPF); (2) proposed a new weighted function; and (3) a new regularization form is derived and constructed. In this algorithm, the weighted function and the new smoothed function are combined as the sparsity-promoting object, and a new regularization form is derived and constructed to enhance de-noising performance. Performance simulation experiments on both the real signal and real images show that the proposed WReSL0 algorithm outperforms other popular approaches, such as SL0, BPDN, NSL0, and L p -RLSand achieves better performances when it is used for UBSS.
- Published
- 2018
- Full Text
- View/download PDF
27. 基于RSSI的加权蜂窝形状质心定位算法.
- Author
-
邹东尧, 刘碧微, and 李晨
- Abstract
Aiming at the problem that the positioning accuracy based on received signal strength (RSSI) algorithm was easily affected by environmental disturbance, an improved weighted centroid positioning algorithm was proposed. First, an optimal length was adopted to improve localization accuracy by analyzing the relationship between the communication distance and ranging error. Then, the localization area was divided into several honeycomb sub-regions with the optimal length according to the situation of the overall environment. And these honeycomb sub-regions developed their environmental parameters by the least squares fitting method. Last, RSSI values were filtrated by Gaussian distribution model and weighted arithmetic to ensure the reliability. The simulation results showed the improved algorithm had better efficiency and positioning accuracy, compared with the traditional weighted triangular centroid positioning algorithm. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
28. Weighted Hardy-Littlewood-Sobolev inequalities on the upper half space.
- Author
-
Dou, Jingbo
- Subjects
- *
HARDY-Littlewood method , *MATHEMATICAL inequalities , *SOBOLEV spaces , *EXTREMAL problems (Mathematics) , *BOUNDARY value problems , *MATHEMATICAL functions - Abstract
In this paper, we establish a weighted Hardy-Littlewood-Sobolev (HLS) inequality on the upper half space using a weighted Hardy type inequality on the upper half space with boundary term, and discuss the existence of extremal functions based on symmetrization argument. As an application, we can show a weighted Sobolev-Hardy trace inequality with -biharmonic operator. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
29. Fuzzy Portfolio Selection Using a Weighted Function of Possibilistic Mean and Variance in Business Cycles.
- Author
-
Chen, I-Fei and Tsaur, Ruey-Chyn
- Subjects
PORTFOLIO management (Investments) ,INVESTMENT risk ,RECESSIONS ,FUZZY sets ,BUSINESS cycles ,INVESTMENT policy - Abstract
Investment portfolios are typically selected to reduce investment risk. In an economic recession or depression, investment strategies tend to be short term, subtle, and uncertain. When the economy is recovering or booming, investors should approach portfolio selection differently in response to the varying investment return and risk. Therefore, this study posits that different portfolios should be selected in different stages of the business cycle. An improved function for weighting possibilistic mean and variance is proposed, and a weighted fuzzy portfolio model for various investment conditions is then derived. Finally, a numerical example is presented to illustrate that the proposed models can obtain the optimal proportion of an investment throughout the business cycle to meet investors' expectations. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
30. A self-adjusted weighted likelihood ratio test for global clustering of disease.
- Author
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Shu, Lianjie, Zhou, Ruoyu, and Su, Yan
- Subjects
- *
MAXIMUM likelihood statistics , *DISEASE clusters , *LOCALIZATION (Mathematics) , *INFORMATION theory , *GEOGRAPHIC information systems - Abstract
Compared to tests for localized clusters, the tests for global clustering only collect evidence for clustering throughout the study region without evaluating the statistical significance of the individual clusters. The weighted likelihood ratio (WLR) test based on the weighted sum of likelihood ratios represents an important class of tests for global clustering. Song and Kulldorff (Likelihood based tests for spatial randomness. Stat Med. 2006;25(5):825–839) developed a wide variety of weight functions with the WLR test for global clustering. However, these weight functions are often defined based on the cell population size or the geographic information such as area size and distance between cells. They do not make use of the information from the observed count, although the likelihood ratio of a potential cluster depends on both the observed count and its population size. In this paper, we develop a self-adjusted weight function to directly allocate weights onto the likelihood ratios according to their values. The power of the test was evaluated and compared with existing methods based on a benchmark data set. The comparison results favour the suggested test especially under global chain clustering models. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
31. Global optimized algorithm for weighted function of multi-model system.
- Author
-
Shan, Chen and Tianhong, Pan
- Abstract
There is mismatch phenomenon between local model and weighted function in multi-model system. In order to overcome this problem, an online optimization algorithm is presented by the enlightenment of the basic properties of multimodel system. Firstly, based on the global equations and the current input/output data of multi-model system, the optimized algorithm is deduced by least square algorithm. Then, the corresponding convergence analysis is given. In the end, a simulation experiment shows the effectiveness of the proposed algorithm. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
32. Weighted Ostrowski Type Inequalities with Application to Onepoint Integral Formula.
- Author
-
Kovač, S., Pečarić, J., and Tipurić-Spužević, S.
- Abstract
We develop weighted generalization of the recently obtained Ostrowski type inequalities for continuous functions with eventually one point of non-differentiability. We apply these general result for some famous weight functions. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
33. Weighting links based on edge centrality for community detection.
- Author
-
Sun, Peng Gang
- Subjects
- *
GRAPH theory , *BETWEENNESS relations (Mathematics) , *INFORMATION science , *PERFORMANCE evaluation , *CLUSTER analysis (Statistics) - Abstract
Abstract: Link weights have the equally important position as links in complex networks, and they are closely associated with each other for the emergence of communities. How to assign link weights to make a clear distinction between internal links of communities and external links connecting communities is of vital importance for community detection. Edge centralities provide a powerful approach for distinguishing internal links from external ones. Here, we first use edge centralities such as betweenness, information centrality and edge clustering coefficient to weight links of networks respectively to transform unweighted networks into weighted ones, and then a weighted function that both considers links and link weights is adopted on the weighted networks for community detection. We evaluate the performance of our approach on random networks as well as real-world networks. Better results are achieved on weighted networks with stronger weights of internal links of communities, and the results on unweighted networks outperform that of weighted networks with weaker weights of internal links of communities. The availability of our findings is also well-supported by the study of Granovetter that the weak links maintain the global integrity of the network while the strong links maintain the communities. Especially in the Karate club network, all the nodes are correctly classified when we weight links by edge betweenness. The results also give us a more comprehensive understanding on the correlation between links and link weights for community detection. [Copyright &y& Elsevier]
- Published
- 2014
- Full Text
- View/download PDF
34. Oscillation and asymptotic analysis on a new generalized Emden–Fowler equation
- Author
-
Liu, Haidong, Meng, Fanwei, and Liu, Puchen
- Subjects
- *
OSCILLATION theory of differential equations , *ASYMPTOTIC theory of algebraic ideals , *DIFFERENTIAL equations , *DELAY differential equations , *LITERATURE reviews , *MATHEMATICAL analysis , *AVERAGING method (Differential equations) - Abstract
Abstract: In this work, we analyze the new generalized Emden–Fowler equation with neutral type delays:where . By use of averaging technique and specific analytical skills, some easily-accessible oscillation and asymptotic criteria are established, which have extended the results in the cited literature. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF
35. Optimization of Performance Weighted Function for Missile Robust Controller Using PSO Algorithm.
- Author
-
Zhang Min, Chen Xin, and Lu Yu-Ping
- Published
- 2011
- Full Text
- View/download PDF
36. On the Hilbert Type Integral Inequalities with Some Parameters and Its Reverse.
- Author
-
Yildirim, Hüseyin, Özkan, Umut Mutlu, and Sarikaya, Mehmet Zeki
- Subjects
- *
INTEGRAL inequalities , *CHARACTERISTIC functions , *LIPSCHITZ spaces , *GEOMETRIC function theory , *PARAMETER estimation , *MATHEMATICAL analysis - Abstract
This paper deals with some new generalizations of the Hardy-Hilbert type integral inequalities with some parameters. We also consider the equivalent inequalities and the reverse forms. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
37. Meshless numerical method based on tensor product.
- Author
-
Sun, Haitao, Wang, Yuanhan, and Miao, Yu
- Abstract
A normalized space constructed by tensor product is used in field function approach to give a special case of moving least squares (MLS) interpolation scheme. In the regular domain, the field function which meets homogenous boundary conditions is constructed by spanning base space to make the MLS interpolation scheme simpler and more efficient. Owing to expanded basis functions selection, some drawbacks in general MLS method, for example repeated inversion, low calculation efficiency, and complex criterions, can be avoided completely. Numerical examples illustrate that the proposed method is characterized by simple mathematical concept, convenient repeat calculations with high accuracy, good continuity, less computation and rapid convergence. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
38. The Satisfaction Solution of Multi-objective Optimization of Reliability Based on Control Principle of Feedback.
- Author
-
WU Wei-dong, HUANG Hong-zhong, and GU Ying-kui
- Abstract
Through analyzing the uncertainty factors of multi objective optimization problems, it shows that Pareto solution should be generalized to fuzzy multi-objective optimization model, and the model is used to find the satisfactory solution through soft computing. According to the property of membership function in fuzzy sets theory, each sub objective can be dealt with satisfactory function. After analyzing the similarity between closed loop control theory in control system and the dynamic progress in soft computing of multi objective satisfactory solution optimization, the paper developed a general judgment function method of multi-objective satisfaction solution. The method is based on closed loop feedback control theory and is dealt with correcting weight function, relative optimum membership function and weight index of importance. At last, an illustrative example of multi objective optimization of mechanical component reliability was given. [ABSTRACT FROM AUTHOR]
- Published
- 2005
39. The Oscillatory Behavior of Second Order Nonlinear Elliptic Equations.
- Author
-
Zhiting Xu
- Subjects
- *
OSCILLATIONS , *OSCILLATION theory of difference equations , *NONLINEAR difference equations , *DIFFERENCE equations , *DIFFERENTIAL equations - Abstract
Some oscillation criteria are established for the nonlinear damped elliptic differential equation of second order [Multiple line equation(s) cannot be represented in ASCII text] which are different from most known ones in the sense that they are based on a new weighted function H(r; s; l) defined in the sequel. Both the cases when Dibi (x) exists for all i and when it does not exist for some i are considered. [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
40. Exponential attractors of the ginzburg-landau-BBM equations in an unbounded domain.
- Author
-
Zhengde, Dai and Murong, Jiang
- Abstract
In this paper, the existence of the exponential attractors for the Ginzburg-Landau-BBM equations in an unbounded domain is proved by using weighted function and squeezing property. [ABSTRACT FROM AUTHOR]
- Published
- 2001
- Full Text
- View/download PDF
41. A Family of Robust M-Shaped Error Weighted Least Mean Square Algorithms: Performance Analysis and Echo Cancellation Application
- Author
-
Hongyu Han, Jiashu Zhang, Sheng Zhang, and Wei Xing Zheng
- Subjects
Normalization (statistics) ,Adaptive filter ,0209 industrial biotechnology ,General Computer Science ,Computer science ,Monte Carlo method ,General Engineering ,020206 networking & telecommunications ,02 engineering and technology ,steady-state analysis ,Least mean squares filter ,020901 industrial engineering & automation ,Robustness (computer science) ,Statistics ,weighted function ,0202 electrical engineering, electronic engineering, information engineering ,General Materials Science ,Algorithm design ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,Algorithm ,Root-mean-square deviation ,lcsh:TK1-9971 - Abstract
Due to the good filter performance for the non-Gaussian noise, the adaptive filters with error nonlinearities have received increasing attention recently. From the viewpoint of the weighted function, in this paper, the existing least mean square (LMS)-based adaptive algorithms with error nonlinearities are divided into three types, i.e., V-shaped, $\Lambda $ -shaped, and M-shaped algorithms. Then, to obtain the merits of the V-shaped and $\Lambda $ -shaped algorithms, a new family of robust M-shaped error weighted LMS algorithms is proposed. Their steady-state mean square deviation (MSD) analyses are made, which reveal the learning abilities of error nonlinearities: 1) for the V-shaped algorithm, it can achieve smaller steady state MSD for sub-Gaussian noise than that for super-Gaussian noise; 2) the $\Lambda $ -shaped algorithm can be used more effectively for super-Gaussian noise than that for sub-Gaussian noise; and 3) the M-shaped algorithm combines the characteristics of the V-shaped and $\Lambda $ -shaped algorithms. Furthermore, based on the proposed robust M-shaped function, a proportionate normalized robust M-shaped algorithm is presented for echo cancellation application. Finally, Monte Carlo simulations are conducted to verify the theoretical results and to demonstrate the efficiency of the proposed algorithms in different environments.
- Published
- 2017
42. Urban Building Change Detection in SAR Images Using Combined Differential Image and Residual U-Net Network
- Author
-
Hong Zhang, Chao Wang, Lu Li, Fan Wu, and Bo Zhang
- Subjects
Synthetic aperture radar ,010504 meteorology & atmospheric sciences ,Computer science ,Science ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,0211 other engineering and technologies ,02 engineering and technology ,Residual ,color difference image ,01 natural sciences ,Urban planning ,Radar imaging ,residual U-Net ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,urban building change detection ,business.industry ,Pattern recognition ,Statistical model ,synthetic aperture radar (SAR) ,Support vector machine ,weighted function ,General Earth and Planetary Sciences ,Artificial intelligence ,Scale (map) ,business ,Change detection - Abstract
With the rapid development of urbanization in China, monitoring urban changes is of great significance to city management, urban planning, and cadastral map updating. Spaceborne synthetic aperture radar (SAR) sensors can capture a large area of radar images quickly with fine spatiotemporal resolution and are not affected by weather conditions, making multi-temporal SAR images suitable for change detection. In this paper, a new urban building change detection method based on an improved difference image and residual U-Net network is proposed. In order to overcome the intensity compression problem of the traditional log-ratio method, the spatial distance and intensity similarity are combined to generate a weighting function to obtain a weighted difference image. By fusing the weighted difference image and the bitemporal original images, the three-channel color difference image is generated for building change detection. Due to the complexity of urban environments and the small scale of building changes, the residual U-Net network is used instead of fixed statistical models and the construction and classifier of the network are modified to distinguish between different building changes. Three scenes of Sentinel-1 interferometric wide swath data are used to validate the proposed method. The experimental results and comparative analysis show that our proposed method is effective for urban building change detection and is superior to the original U-Net and SVM method.
- Published
- 2019
- Full Text
- View/download PDF
43. The corrected two-point weighted quadrature formulae
- Author
-
Sanja Kovač
- Subjects
weighted function ,corrected formula ,two-point quadrature formula ,w-harmonic sequences of functions ,$L_p$ spaces ,corrected Gauss formula ,weighted corrected Maclaurin two-point formula ,weighted corrected trapezoid formula ,weighted corrected midpoint formula ,weighted corrected Newton-Cotes two-point formula ,Weight function ,corrected quadrature formula ,$w-$harmonic sequences of functions ,weighted corrected Maclaurin formula ,Mathematical analysis ,Gauss ,Midpoint ,Analysis ,Gauss–Kronrod quadrature formula ,Quadrature (mathematics) ,Mathematics - Abstract
The weighted version of the corrected two-point quadrature formula is derived. In the corrected two-point formula the integral is approximated both with the values of the integrand in nodes $x$ and $a+b-x$, and the values of its first derivative in the end-points of the interval $[a, b]$. Those formulae have a degree of exactness higher than the ordinary formulae. Estimates of error bounds under various regularity conditions for such formulae are established. As special cases, the corrected two-point formulae of Gauss type are obtained. Also, the corrected version of weighted trapezoid, weighted midpoint, weighted two-point Maclaurin and weighted two-point Newton-Cotes formulae are considered.
- Published
- 2010
- Full Text
- View/download PDF
44. The local boundedness of solutions for a class of degenerate nonlinear elliptic higher-order equations withL1-data
- Author
-
Francesco Nicolosi, S. Bonafede, BONAFEDE S, and NICOLOSI F
- Subjects
Numerical Analysis ,Class (set theory) ,Higher order equations ,Higher-order equation ,Applied Mathematics ,Mathematical analysis ,Degenerate energy levels ,Weighted function ,Computational Mathematics ,Nonlinear system ,Settore MAT/05 - Analisi Matematica ,Local boundedness ,Boundedness of solutions ,Applied mathematics ,Analysis ,Mathematics - Abstract
We prove local boundedness of solutions for a class of degenerate nonlinear elliptic higher-order equations with L(1)-data.
- Published
- 2008
- Full Text
- View/download PDF
45. Urban Building Change Detection in SAR Images Using Combined Differential Image and Residual U-Net Network.
- Author
-
Li, Lu, Wang, Chao, Zhang, Hong, Zhang, Bo, and Wu, Fan
- Subjects
- *
SYNTHETIC aperture radar , *REMOTE sensing , *URBAN planning , *RESIDUAL stresses , *LAND cover - Abstract
With the rapid development of urbanization in China, monitoring urban changes is of great significance to city management, urban planning, and cadastral map updating. Spaceborne synthetic aperture radar (SAR) sensors can capture a large area of radar images quickly with fine spatiotemporal resolution and are not affected by weather conditions, making multi-temporal SAR images suitable for change detection. In this paper, a new urban building change detection method based on an improved difference image and residual U-Net network is proposed. In order to overcome the intensity compression problem of the traditional log-ratio method, the spatial distance and intensity similarity are combined to generate a weighting function to obtain a weighted difference image. By fusing the weighted difference image and the bitemporal original images, the three-channel color difference image is generated for building change detection. Due to the complexity of urban environments and the small scale of building changes, the residual U-Net network is used instead of fixed statistical models and the construction and classifier of the network are modified to distinguish between different building changes. Three scenes of Sentinel-1 interferometric wide swath data are used to validate the proposed method. The experimental results and comparative analysis show that our proposed method is effective for urban building change detection and is superior to the original U-Net and SVM method. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
46. A Regularized Weighted Smoothed L0 Norm Minimization Method for Underdetermined Blind Source Separation.
- Author
-
Wang, Linyu, Yin, Xiangjun, Yue, Huihui, and Xiang, Jianhong
- Subjects
- *
COMPRESSED sensing , *SIGNAL sampling , *IRREGULAR sampling (Signal processing) , *WIRELESS sensor networks , *WIRELESS communications - Abstract
Compressed sensing (CS) theory has attracted widespread attention in recent years and has been widely used in signal and image processing, such as underdetermined blind source separation (UBSS), magnetic resonance imaging (MRI), etc. As the main link of CS, the goal of sparse signal reconstruction is how to recover accurately and effectively the original signal from an underdetermined linear system of equations (ULSE). For this problem, we propose a new algorithm called the weighted regularized smoothed L 0 -norm minimization algorithm (WReSL0). Under the framework of this algorithm, we have done three things: (1) proposed a new smoothed function called the compound inverse proportional function (CIPF); (2) proposed a new weighted function; and (3) a new regularization form is derived and constructed. In this algorithm, the weighted function and the new smoothed function are combined as the sparsity-promoting object, and a new regularization form is derived and constructed to enhance de-noising performance. Performance simulation experiments on both the real signal and real images show that the proposed WReSL0 algorithm outperforms other popular approaches, such as SL0, BPDN, NSL0, and L p -RLSand achieves better performances when it is used for UBSS. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
47. Weighted Ostrowki type inequalities with application to onepoint integral formula
- Author
-
Sanja Tipurić-Spužević, Sanja Kovač, and Josip Pečarić
- Subjects
Algebra ,Generalization ,weighted function ,Chebyshev functional ,Sonin identity ,onepoint integral formula ,Ostrowski inequality ,General Mathematics ,Point (geometry) ,Integral formula ,Type (model theory) ,Mathematics ,Ostrowski's theorem - Abstract
We develop weighted generalization of the recently obtained Ostrowski type inequalities for continuous functions with eventually one point of non-differentiability. We apply these general result for some famous weight functions.
- Published
- 2014
- Full Text
- View/download PDF
48. Hölder continuity of solutions for higher order degenerate nonlinear parabolic equations
- Author
-
Nicolosi, F. and Skrypnik, I. V.
- Published
- 1998
- Full Text
- View/download PDF
49. The new method of discrete-coded signals processing based on atomic functions
- Author
-
Kravchenko, Victor F. and Smirnov, D. V.
- Subjects
signal processing ,antenna system ,wideband signals ,antenna radiation patterns ,matched filtering ,weighted function ,atomic function - Abstract
Ambiguity functions of weighted discrete-coded signals are constructed. The optimal weighted functions, based on Kravchenko-Rvachev atomic functions, for signal processing are offered. Their efficiency applied to the problems of side-lobe reduction of ambiguity function is shown.
- Published
- 2005
50. Univalent Functions in Dirichlet-Type Spaces
- Author
-
Qian, Ruishen and Shi, Yecheng
- Published
- 2016
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