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Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office 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.)

Copyright of Journal of Henan University of Technology Natural Science Edition is the property of Henan University of Technology Journal Editorial Department 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.)

Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office 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.)

Copyright of Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences Editorial Office 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.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press 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.)

Copyright of Journal of Academic Library & Information Science is the property of Anhui University 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.)

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office 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.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office 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.)

BACKGROUND: Currently, artificial valves used in heart valve operations include biological valves and mechanical valves. The design and processing of the biological valve bracket determine the shape of the biological valves, which in turn determines their service life. OBJECTIVE: Various lobe and bracket models were created based on the spatial geometric equation. Through a comparison of the deformation and stress distribution of various lobe and bracket models, a more rational bracket model was derived. Subsequently, 3D printing technology was utilized to produce a solid model. METHODS: According to the geometric and mathematical models of the heart valve leaf and valve bracket, parabolic and ellipsoidal heart valve bracket models were created. Three-dimensional modeling was used to design the heart valve bracket. Two-way fluid-structure coupling analysis was conducted to analyze the force and deformation of the valve bracket in the blood flow field. An appropriate printing method and materials were selected to achieve 3D printing of the heart valve bracket. RESULTS AND CONCLUSION: The distribution rules of deformation, maximum principal stress, and maximum shear stress of the parabolic bracket and ellipsoidal bracket are the same. The deformation and stress of the ellipsoidal bracket were greater than those of the parabolic bracket. The distribution law of maximum principal stress and maximum shear stress was mainly concentrated in the joint part of the lobe and bracket. The total deformation, maximum principal stress, and maximum shear stress of the bracket decrease with the increase of the bracket diameter. [ABSTRACT FROM AUTHOR]

Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office 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.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology 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.)

Copyright of Journal of Atomic & Molecular Physics (1000-0364) is the property of Journal of Atomic & Molecular Physics Editorial Office 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.)

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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.)

Copyright of Electronic Science & Technology is the property of Electronic Science & Technology Editorial Office 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.)

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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.)

Copyright of South China Fisheries Science is the property of South China Fisheries Science Editorial Department 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.)

Copyright of Evaluation & Analysis of Drug-Use in Hospitals of China / Zhongguo Yiyuan Yongyao Pingjia yu Fenxi is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board 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.)

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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.)

Copyright of Journal of Shanghai Ocean University is the property of Editorial Department of Journal of Shanghai Ocean University 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.)

Water resource is very deficient in the world. Agricultural water consumption is accounted for a large proportion of the total. Especially, high consumption can be found in the protected cultivation of vegetables, due to the great scale and multiple cropping index. Hence, it is urgent to develop water-saving irrigation for protected cultivation. However, simple and practical technology is still lacking in practical production. In this study, three typical soil textures (loam, clay loam, and sandy loam) were adopted for vegetable cultivation. Cucumber was selected as the experimental material, because of its wide cultivation areas. A field experiment was carried out from 2021-08-02 to 2021-12-24 in the Chinese solar greenhouse in Beijing, China. Cultivation density was set as 2.57 plants per square meter. Three irrigation treatments for each soil texture were performed from the fruiting period in the form of drip irrigation. The accumulated solar radiation reached up to the setting value (15/20/25 MJ/m²), corresponding to the onset of the irrigation system. The data logger was reset and recounted in the control system. There was consistency in the total irrigation amount under the same accumulation of solar radiation for each soil texture. A systematic investigation was made to explore the effects of different irrigation strategies on the growth and quality of autumn-winter cucumber under the above soil textures. The average air temperature varied from 11.5 to 25.6 ℃ during this experiment. There were 35 days below 12 ℃ during nighttime. The daily solar radiation on the plant canopy varied from 0.18 to 11.87 MJ/(m²·d). Meanwhile, the average water vapor deficit during the daytime varied from 0.11 to 3.75 kPa. Results showed that the irrigation strategies with different accumulated solar radiations caused the ‘ high frequency and low irrigation amount’ and ‘ low frequency and high irrigation amount’ . However, there was no influence of different irrigation strategies on the fruit yield and irrigation water use efficiency using the same total irrigation amount under the same soil texture. Greater photosynthetic rate, leaf area, plant height, and number of internodes were obtained, when the accumulated solar radiation of 25 MJ/m² was set as the irrigation starting point, together with each irrigation amount of 3.22, 3.56, and 2.77 mm for the loam, clay loam, sandy loam, respectively. The highest contents of soluble sugar and vitamin C and the lowest nitrate content were all achieved, when the accumulated solar radiation of 20 MJ/m² was set as the irrigation starting point, together with the irrigation amount of 2.59, 2.85, and 2.22 mm for the loam, clay loam, sandy loam, respectively. Meanwhile, there was no significant difference in soil textures on the contents of soluble sugar, soluble protein, and vitamin C. Therefore, controlling accumulated solar radiation can be expected to serve as the irrigation starting point for the feasible irrigation strategy in protected cultivation. Meanwhile, the discrepant parameters of accumulated solar radiation as an irrigation starting point should be considered for the different cultivation goals under various soil textures. [ABSTRACT FROM AUTHOR]

Copyright of Electric Power is the property of Electric Power Editorial Office 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.)

In order to obtain the optimal inhomogeneous laser waveform of harmonic emission, the optimal waveforms of three - color pulse under the positive and negative inhomogeneous effects have been found by solving the time - dependent Schrodinger equation. The results show that the optimal extended high order harmonic spectra can be obtained by choosing the best positive and negative laser waveforms under the positive and negative inhomogeneous effects, respectively. Finally, the pulse duration of 43 as pulse can be obtained by Fourier transform in the harmonic plateau region. [ABSTRACT FROM AUTHOR]

Dissolved oxygen content is an important factor affecting eel culture. To improve the prediction accuracy of dissolved oxygen concentration in eel ponds, this paper proposes a model for predicting dissolved oxygen concentration in eel ponds based on the sparrow search algorithm (SSA) and long short-term memory neural network ( LSTM), after optimizing the hyperparameters of LSTM model using SSA algorithm, the dissolved oxygen in circulating water eel culture ponds was predicted. The results showed that the prediction accuracy of SSA-LSTM model was 96. 77%, which was 2. 09%, 3. 34% and 0. 55% higher than the control models LSTM, GRU and PSO-LSTM, respectively. The other indicators of this model, EMSE, EMAE and ERMSE, were 0. 67, 0. 53, and 0. 81, respectively, which also showed significant decreases compared with the control model. The results indicate that the SSA-LSTM model has good accuracy and robustness in predicting dissolved oxygen concentration in eel ponds, which can provide a basis for accurate regulation of water quality parameters in eel culture. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Railway Science & Engineering is the property of Journal of Railway Science & Engineering Editorial Office 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.)

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office 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.)

Copyright of Urban Architecture & Development is the property of Omniscient Pte. Ltd. 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.)

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security 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.)

Copyright of Electric Drive is the property of Electric Drive Editorial Office 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.)

Copyright of Journal Of Sichuan University (Natural Sciences Division) / Sichuan Daxue Xuebao-Ziran Kexueban is the property of Editorial Department of Journal of Sichuan University Natural Science Edition 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.)

Copyright of Journal of Beijing University of Traditional Chinese Medicine is the property of Journal of Beijing University of Traditional Chinese Medicine 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.)

Copyright of Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition) is the property of Chongqing University of Posts & Telecommunications 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.)

Copyright of Guihaia is the property of Guihaia Editorial Office 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.)

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security 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.)

BACKGROUND: The main treatment for valvular heart disease is heart valve replacement. The design and performance optimization of artificial heart valves are currently the areas of research. Numerical analysis and experimental methods are major keys to analyzing the mechanical properties of artificial heart valves. Analyzing the mechanical properties of the valves by finite element method and displaying the mciro-stress of the valves in vivo provide more accurate data for the design and performance optimization of artificial heart valve. OBJECTIVE: To establish a more realistic vascular model and investigate the effects of stratified vessels on the deformation characteristics and stress distribution of aortic valves, providing theoretical mechanical data for further improving the design of artificial heart valve. METHODS: Finite element geometric models and mathematical models including aortic valve, vessel wall and blood were established, in which the vessel wall was stratified. The effects of stratification characteristics on the fluid-solid interaction deformation and stress of the aortic valve were investigated to verify the importance of the stratified vessel wall. RESULTS AND CONCLUSION: Valve deformation mainly occurred in the leaflets, the arterial wall had no obvious deformation, the highest level of free deformation was observed at the leaflet free edge. The deformation from the free edge of the leaflet to the suture edge showed a gradient decrease tendency. The maximum equivalent stress of the whole heart valve model was located on the outer arterial wall (near the suture point of the valve leaflet and the arterial wall). The inner and outer arterial walls were greatly different in force. The equivalent stress value of the inner arterial wall was much smaller than that of the outer arterial wall. The stress between inner and outer arterial walls was not continuous. The maximum equivalent stress of the leaflets was at the suture edge of the leaflets and the arterial wall. Compared with the previous studies that did not consider the stratification characteristics of the arterial wall, the maximum equivalent stress value of the leaflets was closer to the ex vivo failure stress of the human mitral valve leaflets. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition) is the property of Chongqing University of Posts & Telecommunications 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.)

At present, most data stream classification algorithms assume that the class distribution is basically balanced. However, the data distribution is often unbalanced and accompanied by conceptual drift in real data stream environments. Aiming at the problem of unbalanced data distribution and concept drift, we propose an unbalanced data stream classification algorithm based on ensemble learning. Firstly, in order to solve the problem of unbalanced data flows, a mixed sampling method is added to balance the data set before model training. And then the concept drift problem is solved with base classifier weight and elimination strategy. Finally, comparison experiments among data stream classification algorithms are carried out on artificial and real data sets. Experimental results show that the proposed algorithm has better overall classification performance than other algorithms in data stream environments with concept drift and imbalance. [ABSTRACT FROM AUTHOR]

Copyright of Journal on Communication / Tongxin Xuebao is the property of Journal on Communications Editorial Office 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.)

Copyright of Journal of Beijing University of Traditional Chinese Medicine is the property of Journal of Beijing University of Traditional Chinese Medicine 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.)

BACKGROUND: Cardiac valve replacement provides an effective therapeutic means for valvular heart disease. Compared with thoracotomy surgery, interventional treatment, typified by transcatheter aortic valve implantation, has the advantages of minor trauma and rapid recovery. At present, the transcatheter aortic valve replacement is rarely applied in clinical practice. Existing studies mainly focus on the changes of physiological conditions after surgery, while little is reported on the transcatheter aortic valve models. OBJECTIVE: To explore the deformation and stress distribution features of the transcatheter aortic valve, and to verify its working performance. METHODS: The finite element geometric model and mathematical model of the aortic valve, including the aortic valve, blood vessel wall, blood and stent, were established. The fluid structure interaction analysis was carried out by the immersion boundary method, and the effective orifice area index was calculated to verify the performance of the model. RESULTS AND CONCLUSION: During the course of blood shock, the valve leaflets were curl, and the maximum deformation occurred at 1/4 and 3/4 of the valve leaflet free edge. The largest equivalent stress of the aortic valve model was on the stent, but it is almost unformed. The stress concentration of the valve leaflets was located at the curved site of the free edge and the suture points of the leaflets and stents, where a damage easily occurred. The dynamic flow experiments show that the process of the simulation model deformation and effective orifice area index are close to the experimental results. Therefore, the simulation model is reasonable and effective. [ABSTRACT FROM AUTHOR]

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office 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.)

Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board 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.)