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A non-quasi-static model for nanowire gate-all-around tunneling field-effect transistors

Chinese Physics B 2023年第6期32卷 660-665页

作者：芦宾马鑫王大为柴国强董林鹏苗渊浩 School of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030000China Shaanxi Province Key Laboratory of Thin Films Technology&Optical Test Xi'an Technological UniversityXi'an 710032China Research and Development Center of Optoelectronic Hybrid IC Guangdong Greater Bay Area Institute of Integrated Circuit and SystemGuangzhou 510535China

Nanowires with gate-all-around(GAA) structures are widely considered as the most promising candidate for 3-nm technology with the best ability of suppressing the short channel effects,and tunneling field effect transistors(TFETs)based on GAA structures also present improved *** this paper,a non-quasi-static(NQS) device model is developed for nanowire GAA *** model can predict the transient current and capacitance varying with operation frequency,which is beyond the ability of the quasi-static(QS) model published *** agreements between the model results and numerical simulations are ***,the NQS model is derived from the published QS model including the current-voltage(I-V) and capacitance-voltage(C-V) ***,the NQS model is compatible with the QS model for giving comprehensive understanding of GAA TFETs and would be helpful for further study of TFET circuits based on nanowire GAA structure.

关键词： tunneling field effect transistor relaxation time approximation non-quasi-static non-quasi-static

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research on Navigation and Positioning technology for Autonomous Recovery of Unmanned Surface Vehicles 30

Research on Navigation and Positioning Technology for Autono...

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30th Saint Petersburg International Conference on Integrated Navigation systems, ICINS 2023

作者： Xu, Chen Cai, Li-Ming Sun, Xue-Jiao Hu, Chang-Qing Li, Qing-Zhou Beijing Institute of Aerospace Control Devices Beijing China Aero-Times Marine Equipment Technology Development Co. Qingdao China Intelligent Unmanned System Overall Technology Research and Development Center China Aerospace Science and Technology Corporation Beijing China Laoshan Laboratory Qingdao China

ISBN: (纸本)9785919950950

The launch and recovery of Unmanned Surface Vehicles (USV) have long relied on manual assistance, which is one of the important factors limiting the wide application of USV in practical engineering. Navigation and positioning technology is the key to achieve autonomous recovery of USV. However, at present, the recovery process of USV basically still adopts manual remote control means, with high security requirements and low level of intelligence. This paper firstly describes the current situation of the application of navigation and positioning technology in the process of autonomous recovery of USV from two aspects: long-range USV navigation and positioning technology and close-range target relative positioning technology. By combining the characteristics of INS, GNSS, DVL and vision sensors, the framework of robust navigation system for the autonomous recovery of USV is designed for each stage of the recovery process. Then the key technologies involved are analyzed, including USV multi-source navigation information fusion technology and close-range visual relative positioning technology, and the corresponding adaptive federal Kalman filter algorithm and monocular visual positioning system algorithm are designed to realize accurate navigation and positioning in the autonomous recovery of USV. Finally, the navigation and positioning techniques in the autonomous recovery of USV are summarized and prospected. © 2023 Concern CSRI Elektropribor, JSC.

关键词： Adaptive filtering

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Effects of Different Fertilization Treatments on the Growth,Quality,and Microbial Community Structure of Grona styracifolia

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Phyton-International Journal of Experimental Botany 2025年第3期94卷 843-860页

作者： Bingbing Zhang Minghao Li Xiaoli Huang Siqi Zheng Guorong Lai Quan Yang Xiaomin Tang School of Chinese Materia Medica Guangdong Pharmaceutical UniversityGuangzhou510006China Guangdong Provincial Research Center on Good Agricultural Practice&Comprehensive Agricultural Development Engineering Technology of Cantonese Medicinal Materials Guangzhou510006China Comprehensive Experimental Station of Guangzhou Chinese Material MedicaChina Agriculture Research System(CARS-21-16)Guangzhou510006China Key Laboratory of Production&Development of Cantonese Medicinal Materials State Administration of Traditional Chinese MedicineGuangzhou510006China

Fertilization is essential for high yield and quality in Chinese *** styracifolia(Osbeck)***,a distinctive medicinal plant in the Lingnan region,currently encounters cultivation issues stemming from the overuse of chemical *** organic and microbial fertilizers presents a sustainable solution for its cultivation *** study compared a no-fertilization control group with eight treatment groups using various concentrations of compound,organic,compound microbial,and Bacillus amyloliquefaciens fertilizers to evaluate their effects on *** and soil microbial *** results demonstrated that the different fertilization treatments significantly enhanced plant growth and quality of ***,while also increasing the activity of soil enzymes such as urease,invertase,and cellulase,as well as the levels of effective soil *** affiliation function analysis demonstrated that applying Bacillus amyloliquefaciens fertilizer(15 g/kg)exhibited optimal performance in enhancing the growth of *** and improving soil fertility *** sequencing of the soil indicated that under the application of Bacillus amyloliquefaciens fertilizer(15 g/kg),the relative abundance of Actinobacteria and Ascomycota increased significantly by 27.42%and 74.91%,respectively(p<0.05).The application of microbial-based fertilizers significantly enriched the abundance of ***,LEfSe analysis identified distinct microbial biomarkers associated with different ***,redundancy analysis identified Invertase and available potassium(AK)as the primary drivers of soil bacterial and fungal community structures,*** study demonstrated that the application of Bacillus amyloliquefaciens fertilizer(15 g/kg)significantly enhanced soil fertility and restructured microbial *** improvements led to increased yield and quality of ***,providing a s

关键词： Grona styracifolia(Osbeck)H.Ohashi growth active ingredients enzyme activity soil microorganisms

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Modeling of Large-Scale Hydrogen Storage system Considering Capacity Attenuation and Analysis of Its Efficiency Characteristics

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Energy Engineering 2024年第2期121卷 291-313页

作者： Junhui Li Haotian Zhang Cuiping Li Xingxu Zhu Ruitong Liu Fangwei Duan Yongming Peng Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin132012China Ministry of Science and Technology Electric Power Research Institute of State Grid Liaoning Electric Power Co.Ltd.Shenyang110006China Northeast Electric Power Dispatching Control Center Northeast Branch of State Grid Corporation of ChinaShenyang110180China

In the existing power system with a large-scale hydrogen storage system,there are problems such as low efficiency of electric-hydrogen-electricity conversion and single modeling of the hydrogen storage *** order to improve the hydrogen utilization rate of hydrogen storage system in the process of participating in the power grid operation,and speed up the process of electric-hydrogen-electricity *** article provides a detailed introduction to the mathematical and electrical models of various components of the hydrogen storage unit,and also establishes a charging and discharging efficiency model that considers the temperature and internal gas partial pressure of the hydrogen storage *** models are of great significance for studying and optimizing gas storage *** these models,the performance of gas storage units can be better understood and *** studies are very helpful for improving energy storage efficiency and sustainable *** factors affecting the charge-discharge efficiency of hydrogen storage units are *** integrating the models of each unit and considering the capacity degradation of the hydrogen storage system,we can construct an efficiency model for a large hydrogen storage system and power conversion *** addition,the simulation models of the hydrogen production system and hydrogen consumption system were established in MATLAB/*** accuracy and effectiveness of the simulation model were proved by comparing the output voltage variation curve of the simulation with the polarization curve of the typical hydrogen production system and hydrogen consumption *** results show that the charge-discharge efficiency of the hydrogen storage unit increases with the increase of operating temperature,and H2 and O2 partial voltage have little influence on the charge-discharge *** the process of power conversion system converter rectification operation,its efficiency decreases wi

关键词： Hydrogen storage system simulation modeling electrolyzer fuel cell capacity loss

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Bouncing Dynamics of Drops’ Successive Off-center Impact

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Langmuir 2024年第20期40卷 10759-10768页

作者： Gao, Shu-Rong Jia, Qi-Hui Liu, Zhe Shi, Shi-Hua Wang, Yi-Feng Zheng, Shao-Fei Yang, Yan-Ru Hsu, Shu-Han Yan, Wei-Mon Wang, Xiao-Dong Research Center of Engineering Thermophysics North China Electric Power University Beijing102206 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing102206 China Key Laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development Center Sichuan Mianyang621000 China Department of Mechanical Engineering National Taipei University of Technology Taipei10608 Taiwan

Bouncing dynamics of a trailing drop off-center impacting a leading drop with varying time intervals and Weber numbers are investigated experimentally. Whether the trailing drop impacts during the spreading or receding process of the leading drop is determined by the time interval. For a short time interval of 0.15 ≤ Δt* ≤ 0.66, the trailing drop impacts during the spreading of the leading drop, and the drops completely coalesce and rebound;for a large time interval of 0.66 © 2024 American Chemical Society

关键词： Drops

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Interactions between H_(2)O_(2)and dissolved organic matter during granular activated carbon-based residual H_(2)O_(2)quenching from the upstream UV/H_(2)O_(2)process

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Journal of Environmental Sciences 2023年第6期128卷 139-149页

作者： Yaoyao Kang Junfeng Lian Yichun Zhu Zuwen Liu Wentao Li Huiyu Dong Yuanyue Wang Jinfeng Zeng Zhimin Qiang Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China CECEP Environmental Protection Investment Development(Jiangxi)Co.Ltd. Nanchang 330006China Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed Ganzhou 341000China

Granular activated carbon(GAC)filtration can be employed to synchronously quench residual H_(2)O_(2)from the upstream UV/H_(2)O_(2)process and further degrade dissolved organicmatter(DOM).In this study,rapid small-scale column tests(RSSCTs)were performed to clarify the mechanisms underlying the interactions between H_(2)O_(2)and DOM during the GAC-based H_(2)O_(2)quenching *** was observed that GAC can catalytically decompose H_(2)O_(2),with a long-lasting high efficiency(>80%for approximately 50,000 empty-bed volumes).DOM inhibited GAC-based H_(2)O_(2)quenching via a pore-blocking effect,especially at high concentrations(10 mg/L),with the adsorbed DOM molecules being oxidized by the continuously generated·OH;this further deteriorated the H_(2)O_(2)quenching *** batch experiments,H_(2)O_(2)could enhance DOM adsorption by GAC;however,in RSSCTs,it deteriorated DOM *** observation could be attributed to the different·OH exposure in these two *** was also observed that aging with H_(2)O_(2)and DOM altered the morphology,specific surface area,pore volume,and the surface functional groups of GAC,owing to the oxidation effect of H_(2)O_(2)and·OH on the GAC surface as well as the effect of ***-tionally,the changes in the content of persistent free radicals in the GAC samples were insignificant following different aging *** work contributes to enhancing understanding regarding the UV/H_(2)O_(2)-GAC filtration scheme,and promoting the application in drinking water treatment.

关键词： Granular activated carbon H_(2)O_(2)quenching Dissolved organic matter Rapid small-scale column tests Persistent free radicals

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Digit-Module Decoupling Platform Architecture for Safety Automation Equipment 8

Digit-Module Decoupling Platform Architecture for Safety Aut...

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8th Asia Conference on Power and Electrical Engineering, ACPEE 2023

作者： Chen, Xinghua Chen, Jinchang Yu, Hao Ning, Yuanyuan Huang, Lixian Power Dispatching and Control Center of Guangdong Power Grid System Analysis Department Guangzhou China Jiangsu Huaruitai Technology Co. Ltd. Research and Development Department Nanjing China

ISBN: (纸本)9798350345520

The existing safety automation equipment are designed to perform in an integrated and centralized way, with the strategy of one device corresponding to one function, and with strong coupling inside the equipment, which brings the problems of repeatability and complexity in management, increases the management workload, and is difficult to standardize the management;Therefore, it is necessary to design the platform architecture for the safety automation equipment from top to bottom, adopt new rapid link technology and establish common standard communication transmission protocol to standardize the consistency of data transmission;to isolate the collection module and the digital part in terms of hardware part to achieve hardware decoupling;and to divide the basic strategy logic and advanced strategy logic of functional strategy in terms of digital part, to adopt independent hardware intelligent plug-in for special strategy software, form the minimum basic function Amass Unit, set up the data center of equipment, adopt virtual agent mechanism, so as to achieve software decoupling, and form the digit-module decoupling platform architecture of "high integration and loose coupling"for safety automation equipment, which will provide the key technical basis for the standardized management of safety automation equipment. © 2023 IEEE.

关键词： Automation

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Method of enhancement and coloring for underwater image based on multichannel image feature fusion

Method of enhancement and coloring for underwater image base...

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2024 Applied Optics and Photonics China: Optical Sensing, Imaging technology, and Applications, AOPC 2024

作者： Bin, Zhou Ali, Jin Yu, Zhang Ning, Yan Yudi, Zhang Hao, Yu School of Electronic and Electrical Engineering Zhengzhou University of Science and Technology Zhengzhou China Unit 32147 of PLA Baoji China System Engineering Research Institute of Military Sciences Beijing China China Aerospace Academy of System Science and Engineering Beijing China High speed Aerodynamics Institute China Aerodynamics Research and Development Center Mianyang China

ISBN: (数字)9781510687820

ISBN: (纸本)9781510687813

A method combining multi-source input fusion-based underwater image enhancement and GAN-driven grayscale image colorization is proposed to mitigate underwater imaging interference and lighten deep learning models for better generalization and real-time performance. Firstly, spatial domain image enhancement algorithms are utilized to preenhance the underwater images, obtaining predictions of red information in different channels. Then, the original images and pre-enhanced images are jointly used as input images, enabling the model to access more information. This model introduces the idea of fusing and reconstructing features from different levels of multiple input images, aiming to preserve as much original information and features as possible during the image enhancement process. Finally, a generator capable of colorizing grayscale images is trained using a large dataset of color images. The quality of the output colorized images is improved by defining an objective function composed of multiple loss functions. Experimental results show that compared to commonly used methods for low-light image enhancement and colorization, this method achieves better objective evaluation results in terms of peak signal-to-noise ratio, structural similarity, scale-invariant feature transform, thus verifying its excellent performance. © 2024 SPIE.

关键词： Underwater imaging

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AN EXPERIMENTAL STUDY ON THE HIGH-SPEED WHEEL-RAIL ADHESION CHARACTERISTICS OF BRAKING LARGE CREEP UNDER WATER CONDITION 12

AN EXPERIMENTAL STUDY ON THE HIGH-SPEED WHEEL-RAIL ADHESION ...

引用

12th International Conference on Contact Mechanics and Wear of Rail/Wheel systems, CM 2022

作者： Chang, Chongyi Chen, Bo Cai, Yuanwu Wang, Junbiao Railway Science and Technology Research & Development Center China Academy of Railway Sciences Corporation Limited Beijing China Wheel-Rail System Laboratory National Engineering Research Center of System Technology for High-Speed Railway andUrban Rail Transit Beijing China

ISBN: (纸本)9780646865881

With the increase of train velocity, the wheel-rail adhesion behavior will change, which will directly affect the utilization of wheel-rail adhesion during traction and braking of high-speed trains. Common rain and snow weather will cause a significant decrease in the wheel-rail adhesion coefficient. When the adhesion is insufficient, the EMU often has wheel-rail scratches and go beyond the limited braking distance, which endangers driving safety. The engineering application of brake adhesion of high-speed EMUs mainly uses the second peak of adhesion increase (the best adhesion coefficient) in the process of large creep through brake anti-skid control, but its behavior characteristics and micro-mechanism are still unclear, which restricts effective use of brake adhesion of high-speed trains. In this paper, a high-speed full-scale roller rig of wheel-rail interface is used to study the high-speed wheel-rail adhesion characteristics of large braking creep under water medium, wheel-rail adhesion characteristics of large braking creep under water condition based on the full-scale high-speed test rig is proposed, and the test of the influence law of the braking adhesion characteristics is carried out in the continuous change range of 0~30% of the longitudinal creep at the velocity of 100-400km/h under the water condition, with medium roughness level (Ra 0.4~0.6 µm) of the contact interface of the wheel and rail. The test results reveal the law of large creep adhesion characteristics of high-speed wheel-rail under water condition, and provide a theoretical basis for improving the utilization of EMU braking adhesion. © 2022 CM 2022 - 12th International Conference on Contact Mechanics and Wear of Rail/Wheel systems, Conference Proceedings. All rights reserved.

关键词： Adhesion

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Multi-UAV Cooperative Path Planning via Improved Grey Wolf Optimization Algorithm

Multi-UAV Cooperative Path Planning via Improved Grey Wolf O...

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IEEE International Conference on Unmanned systems (ICUS)

作者： Zexian Huang Haosheng Jiang Jian Wu Ding Liu Chunyun Dong Xubin Ping School of Electro-Mechanical Engineering Xidian University Xi'an China System Engineering Research Center Nanjing Institute of Simulation Technology Nanjing China

ISBN: (数字)9798350384185

ISBN: (纸本)9798350384192

Multi-UAV cooperative path planning is a key problem in the research filed on UAV swarm, which is usually a complex nonlinear NP-hard optimization problem. In this paper, the grey wolf optimization (GWO) algorithm is employed to deal with the complex multi-objective optimization problem with multiple constraints in multi-UAV cooperative path planning, and the penalty function method is used to transform the multi-constrained path planning problem into an unconstrained optimization problem. Furthermore, aiming at the problems of slow convergent speed and local optimal solutions in the traditional GWO algorithm, nonlinear convergent factor and Levy flight update strategy are introduced to accelerate the convergent speed and enhance the optimization ability of multi-UAV cooperative path planning algorithm. Finally, the trajectories are smoothed by cubic B-spline curve to improve the flight stability of UAVs.

关键词： Costs simulation Transforms Cost function Path planning Stability analysis Trajectory Splines (mathematics) Optimization Convergence

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