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组合钢板剪力墙是由钢板和混凝土板组成的新型抗侧力构件。本文介绍了组合墙的各种形式。总体上将组合墙分为单层钢板组合墙和双层钢板组合墙。前者可分为现浇混凝土组合墙和预制板组合墙,后者有Bi-Steel（双钢板）组合墙和双层压型钢板组合墙两种形式。本文对每种形式组合墙的抗震性能作了仔细讨论,重点回顾了预制板组合墙的改进措施,包括混凝土板边设缝、预制板设大孔径螺栓孔、采用低屈服点钢材、钢板开圆孔以及去除钢板与竖向边缘构件的连接,形成两边连接组合墙。还讨论了两边连接组合墙的改进方法,包括设置面外支撑、钢板开竖缝、大宽厚比开缝钢板和大高宽比Ⅰ型钢板。最后总结了组合墙的发展趋势。

Copyright of Journal of South China Agricultural University is the property of Gai Kan Bian Wei Hui 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 Cotton Textile Technology is the property of Cotton Textile 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 Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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 Applied Mathematics & Mechanics (1000-0887) is the property of Applied Mathematics & Mechanics 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.)

Butterfly diagram is an essential method for determine the presence of defects in alternating current field measurement. To study the mapping relationship between conventional crack butterfly diagrams and crack profiles, COMSOL Multiphysics was first used to numerically simulate cracks of different sizes, and reconstruction equations for length and depth feature quantities were established. Secondly, through comparative analysis, the corresponding relationship between the characteristic signal and the butterfly diagram was explored, and a mapping equation between the two was further established by combining image processing methods and conventional linear fitting methods. Finally, detection tests were conducted on groove shaped cracks of different sizes of Q235 steel. The experimental results show that the crack profile errors based on length and depth are 5. 46% and 6. 02%, respectively. The study achieved the reuse of butterfly diagrams, providing important references for defect risk assessment methods. [ABSTRACT FROM AUTHOR]

In aquaculture, the cost of feeding is the main factor affecting the efficiency of breeding, accounting for 40 to 80 percent of the total cost. Therefore, how to do scientific feeding is the key to reducing the cost of breeding and increase the economic benefits of breeding. Intelligent feeding is a feeding method of using all kinds of sensors to get the global information in the process of feeding, and combining with the relevant algorithm and model, the information is fed back to the control system to adjust the feeding strategy. It is also an effective means to achieve scientific feeding and improve efficiency. In recent years, some achievements have been made in the research of intelligent feeding in aquaculture, but there are still challenges in the realization of intelligent feeding due to many uncertain factors in aquaculture. The research status of automatic feeding machine and automatic feeding system is introduced. The intelligent feeding methods based on machine vision, acoustics, water quality parameters and biological model are summarized, the advantages and disadvantages of these methods are also summarized. In the future, in order to improve the accuracy of feeding intensity assessment and the adaptability of the intelligent feeding system to the breeding environment, we should strengthen the comprehensive analysis and application of the information such as image, voice, environmental factors and biological models in the process of fish feeding. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Signal Processing is the property of Journal of Signal Processing 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 Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 Chinese Institute of Food Science & Technology / Zhongguo Shipin Xuebao is the property of Journal of Chinese Institute of Food Science & Technology Periodical 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 Telecommunications Science is the property of Beijing Xintong Media Co., 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 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 Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica 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 Modern Preventive Medicine is the property of Modern Preventive Medicine 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 Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics 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 World Nuclear Geoscience is the property of World Nuclear Geoscience 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 Telecommunications Science is the property of Beijing Xintong Media Co., 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 Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science 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 Journal of China University of Petroleum is the property of China University of Petroleum 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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 Library & Information Science in Agriculture is the property of Editorial Board of Journal of Library & Information Science in Agriculture 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 Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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.)

[Objective]The decoupling of agricultural economic growth from the eco-environmental risk of fertilizer non-point source pollution was promoted, so as to provide theoretical support for the effective control of the non-point source pollution of cultivated land and the sustainable use of cultivated land. [Methods] Based on the eco-environmental risk assessment model, the eco-environmental risk of fertilizer non-point source pollution in each area of the Dongting Lake Plain was evaluated at the county level, and the regional difference of the eco-environmental risk of fertilizer non-point source pollution in Dongting Lake Plain was estimated by non-parameter kernel density, and then the decoupling model was used to further analyze the decoupling relationship between agricultural economic growth in the Dongting Lake Plain and the eco-environmental risk of fertilizer non-point source pollution on cultivated land. [Results] From 2009 to 2019, the eco-environmental risk index of fertilizer non-point source pollution in the Dongting Lake Plain showed a trend of rising first and then falling. The eco-environmental risk index of fertilizer non-point source pollution first rose from 0.749 in 2009 to 0.762 in 2014, and then decreased to 0.732 in 2019, first from moderate risk to high risk, and then to moderate risk. Pollution in the central region was more serious. The regional differences in the ecological environment risk of fertilizer non-point source pollution were obvious, showing the characteristics of decentralized agglomeration of two poles, and the internal gap was first expanded and then narrowed. The decoupling relationship between agricultural economic growth and the eco-environmental risk of fertilizer non-point source pollution in the Dongting Lake Plain showed obvious stage characteristics: the first stage was the fluctuation period（2009—2013), and the second stage was the strong decoupling period（2014—2019). [Conclusion] With the promotion of cultivated land source pollution control, the eco-environmental risks of fertilizer non-point source pollution in Dongting Lake Plain had experienced a trend of first rising and then falling, showing obvious regional differences, and the stable decoupling from agricultural economic growth had been basically achieved, and the overall trend of green and sustainable development had been presented. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 and purpose: Chimeric antigen receptor T (CAR-T) cell technology has been widely used in the field of blood tumor treatment. Lentivirus transduction is a key link in the preparation of CAR-T cells, which is closely related to the quality of CAR-T cells. Therefore, the parameters involved in the lentivirus transduction process still need to be further optimized. This study aimed to investigate the effects of multiplicity of infection (MOI), incubation density, activation time before transduction and transduction system height on anti-CD30 CAR-T cells in lentiviral transduction T cells carrying CD30 antibody sequences, optimize the transduction conditions of CAR-T cells, and improve transduction efficiency and CAR-T cells function. Methods: Different MOI, incubation density, activation time before transduction and transduction system height were used to optimize the transduction of human peripheral blood-derived T cells, then proliferation capacity, transduction efficiency, cell viability and killing efficiency in vitro of anti-CD30 CAR-T cells were detected. Results: When the MOI was 1.00, 1.50 and 3.00, the transduction efficiency and effective cell number were significantly higher than those in the 0.00, 0.25 and 0.50  groups. When the incubation density was greater than 0.5×107 cells/mL, the incubation density had no significant effect on the transduction efficiency of T cells. The cell viability rate of the 72  h group was lower than 80%, which was lower compared with other groups significantly, the transduction efficiency of 24 and 48 h was significantly higher compared with the 0  h, 8  h and 16  h groups, and the expansion rate of CAR-T cells in the 48  h group was significantly higher compared with the 24 h group. The transduction efficiency and proliferation capacity of 0.16  mm in height of transduction system were significantly higher compared with the 0.53  mm group, however, had no significant effect on killing efficiency of CAR-T cells in vitro. Conclusion: Through the comprehensive evaluation of CAR-T cells function, the optimal transduction conditions for lentivirus include MOI of 1.00, incubation density of 1.0×107 cells/mL, activation before transduction for 48 h and transduction system height of 0.16 mm. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation 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.)

Alternating current field measurement (ACFM) technology is widely used in defect detection of metal structures in manufacturing and other industrial fields. The angle deflection and crack location problems of single sensor in the process of unpredictable defect detection were studied. Firstly, through the COMSOL Multiphysics simulation results, it can be seen that the X and Y direction components of the field strength have a law of signal complementarity during the angular deflection process, and then the data augmented grey neural network model (DA-GNNM) prediction was realized by establishing a scale factor. At the same time, simulation prediction and regression prediction showed that DA-GNNM model has better prediction effect. In addition, the deflection crack was reconstructed by multigradient deflection simulation. Secondly, the DA-GNNM prediction model was verified to be reasonable by building an experimental platform and signal feature extraction, with an average prediction error of 2. 56% . Finally, the deflection of the reconstructed image of the crack in the non-parallel detection process is further improved through the prediction angle. [ABSTRACT FROM AUTHOR]

Copyright of China Surfactant Detergent & Cosmetics (2097-2806) is the property of China Surfactant Detergent & Cosmetics 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 Automobile Technology is the property of Automobile 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 Cyber Security & Data Governance is the property of Editorial Office of Information Technology & Network 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 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.)

Aiming at the ship risk focusing on calculating the occurrence probability, its control and intervention effect is difficult to assess and reasoning difficulties, the do operator-based ship risk intervention and reasoning method was proposed. Firstly, the causal network was established using a priori knowledge. Secondly, the Leaky Noisy-Or hypothesis and hidden variable nodes were introduced to establish a structural twin-based causal network model. Finally, counterfactual inference was performed based on do operator interventions, and the effectiveness of interventions was determined using sufficient and necessary causes that cause failures. The case analysis shows that the proposed method can effectively measure the effectiveness of risk control measures and determine the impact of the intervention's behavior on the hazard source ranking, with certain stability and superiority. [ABSTRACT FROM AUTHOR]

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology 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.)