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SSrN 2022年

作者： Yao, Kai Huang, Xiao dong, Wenyi Wang, Fupeng Liu, Xueyong Yan, Yu Qu, Yanhui Fu, Yicheng Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Shenzhen518055 China Northeast China Municipal Engineering Design and Research Institute Co Ltd Jilin130021 China Urban and Rural Water Environment Technology R&D Center China Communications Construction Co Ltd Jilin130021 China China Urban and Rural Holdings Group Co Ltd Beijing100029 China State Key Laboratory of Simulation and Regulation of River Basin Water Cycle China Institute of Water Resources and Hydropower Research Beijing100038 China

To investigate the effect of alternating aerobic/anoxic (A/O) on pollutant removal performance and microbial community structure, three sequencing batch reactors (SBr) processes with different alternating A/O times were set up. The results showed that alternating A/O was beneficial for organic matter degradation and promote nitrogen (N) and phosphorus (P) removal performance, and the removal efficiencies of chemical oxygen demand (cod), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) increased 3.41%, 4.76%, 3.51%, and 6.27%, respectively. Besides, alternating A/O affected the dominant microbial community relative abundance (Proteobacteria and Bacteroidetes) and increased microbial richness and diversity. It also increased the relative abundance of aerobic denitrifying, heterotrophic nitrifying, and denitrifying phosphorus removal bacteria to change N and P removal patterns. Furthermore, the abundance of carbohydrate metabolism and amino acid metabolism were improved by alternating A/O to improve organic matter and TN removal. © 2022, The Authors. All rights reserved.

关键词： Chemical oxygen demand

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Study on the optimal parameter design of gas-insulated dC relay systems based on Taguchi method

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Transactions of the Korean Institute of Electrical Engineers 2020年第2期69卷 375-380页

作者： Lee, Ho Jun Kim, Young Kook Jo, Woo Jin Koh, Chang-Seop Ahn, Kilyoung Kim, Young Geun Electro-Tech R&D Center LSIS Co. Ltd. Korea Republic of LV Switch Team Electro-Technology R&D Center LSIS Korea Republic of Department of Electric Engineering Chungbuk University Korea Republic of

As LVdC distribution is widely applied to the industry in 21st century, dC components are used in the many applications. Among various devices, A gas-insulated dC relay is frequently used in ESS and Electric Vehicle systems. In order to develop this device for the better temperature rise and actuating performance, this paper deals with optimal design process in two core components, main contact and linear actuator, respectively. By applying Taguchi method to this system, it is capable of acquiring a set of orthogonal tables with S/N(Signal to Noise) ratio values in the electro-magnetic and heat transfer simulation environments. With respect to data from the orthogonal tables, we get the optimal sets in terms of contribution degree. Based on this methodology, we are able to select an optimized combinations for the best performance. copyright © The Korean Institute of Electrical Engineers.

关键词： Heat transfer

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Effect of Background Magnetic Field on Quench Properties in rebco and Bi-2223 Tapes

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SSrN 2022年

作者： Qiu, T. Zhu, Y.P. Hu, X.B. Liu, Jian Cai, Lijun Xu, M. Zhang, S.N. Feng, J.Q. Tan, Yunfei Yang, Xinsheng Zhao, Y. CRSC Research & Design Institute Group Co. Ltd. Beijing100071 China Superconductivity and New Energy R&D Center Southwest Jiaotong University Chengdu610031 China Southwestern Institute of Physics Chengdu610041 China Northwest Institute for Nonferrous Metal Research Xi’an710016 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

Quench propagation characteristics are very important for high temperature superconductor (HTS). In this paper, quench properties including the minimum quench energy (MQE) and the normal zone propagation velocity (NZPV) in different HTS tapes (rEBco and Bi-2223) under different value and position of background magnetic field were investigated. After applying a heat pulse to rEBco and Bi-2223 tapes, the electric field of each zone was measured to obtain the parameters characterizing MQE and NZPV. The experimental results show that the MQE and NZPV are different with different background magnetic field position for the same kind tape. At the position of heater, the magnetic field will also have an impact on the MQE. The equivalent heat capacity of the two tapes was calculated respectively. It was found that the equivalent heat capacity of Bi-2223 tape is larger than rEBco tape. According to formula derivation, the larger the equivalent heat capacity, the larger the MQE and the smaller NZPV. © 2022, The Authors. All rights reserved.

关键词： High temperature superconductors

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New Insights on corrosion Behavior of Aging Precipitates in dilute Mg-Al-Ca Alloy by Experiments and First-Principles Calculations

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SSrN 2023年

作者： Zhang, Kai Wang, Cheng Liu, Shi Guan, Kai Zhang, Lin-Yang Wang, Hui-Yuan State Key Laboratory of Super Hard Materials China Key Laboratory of Automobile Materials of Ministry of Education School of Materials Science and Engineering Nanling Campus Jilin University No. 5988 Renmin Street Changchun130025 PR China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and Engineering Hebei University of Technology Tianjin300130 China Metal Materials Department of Materials Lightweight Institute General R&D Institute China FAW Co. Ltd No. 3013 Heping Street Changchun130011 China

The effects of aging precipitates (i.e. G.P. zone, Al2Ca) on corrosion behavior of Mg-1.0Al-0.3Ca alloy have been systematically investigated combining experiments and first-principles calculations. Being different from Al2Ca causing the micro-galvanic corrosion of Mg matrix, monolayer G.P. zones significantly decrease the corrosion rate (PW) from 12.71 to 6.65 mm/y, and attain excellent corrosion resistance-strength synergy. The G.P. zones composed of Al and Ca atoms corrode preferentially over Mg matrix, resulting in accumulation of more Al-containing corrosion products on alloy surface. Establishment of compact product film rich in Al-containing oxides weakens the cathode activity of Mg alloy during corrosion. © 2023, The Authors. All rights reserved.

关键词： corrosion resistance

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Characteristics and Mechanism of Upper Permian reef reservoirs in the Eastern Longgang Area, Northeastern Sichuan Basin, China

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Petroleum 2020年第2期6卷 130-137页

作者： Lei Tan Hong Liu Yuzhe Tang Bing Luo Ya Zhang Yuran Yang Yisha Liao Weifeng du Xiran Yang School of Geosciences and Technology Southwest Petroleum UniversityChengdu610500China Beijing Petroleum Machinery Co. CNPC Engineering Technology R&D Company LimitedBeijing102206China The Institute of Exploration and Development of Southwest Oil and Gas Field Branch PetroChinaChengdu610059China Chongqing Gas Field Southwest Oil&Gas Field CompanyPetroChinaChongqing400021China Bureau of Geophysical Prospecting China National Petroleum Corp Zhuozhou072750China Northwest Sichuan Gas Field Southwest Oil&Gas Field CompanyPetroChinaJiangyou621709China

As a typical kind of lithologic reservoirs,reef reservoirs are generally featured by their large single-well reservoir thickness,good reservoir physical properties,and high gas well *** Upper Permian Changxing Formation is an important natural gas exploration target in the Sichuan Basin,which hosts a large reef gas reservoir and is mainly distributed along the Kaijiang-Liangping *** analyses are implemented to investigate reservoir characteristics and identify controlling factors of reef reservoirs in Changxing Formation in the Eastern Longgang Area,Northeastern Sichuan Basin,including core,logging,and seismic data *** Formation reservoirs in the study area mainly occur in the reef-shoal complex,which are featured by wide distribution,large thickness and generally good physical *** rocks are dominantly composed of bioclastic dolomite and silty-fine dolomite(with grain phantom structure),while the main reservoir space consists of residual intergranular pores,intergranular dissolution pores,and karst *** the seismic profiles,typical mound-shaped chaotic reflections can be clearly *** is suggested by the main reservoir development controlling factor analysis that the distributions of reef reservoirs are typically controlled by sedimentary facies belts,while the scale of the reef-shoal complex is determined by the pene-sedimentary *** can not only significantly preserve the primary pores but also enhance the permeability of ***,karstification is the key to high-quality reef-shoal reservoirs.

关键词： Changxing formation reef reservoir characteristics Essential factors Eastern longgang

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Cloud-magnetic resonance imaging system: In the era of 6G and artificial intelligence

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Magnetic resonance Letters 2025年 57-68页

作者： Yirong Zhou Yanhuang Wu Yuhan Su Jing Li Jianyu Cai Yongfu You Jianjun Zhou di Guo Xiaobo Qu Department of Electronic Science Intelligent Medical Imaging R&D Center Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance National Institute for Data Science in Health and Medicine Xiamen University Department of Electronic Science Key Laboratory of Digital Fujian on IoT Communication Xiamen University Shanghai Electric Group Co. Ltd China Telecom Group China Mobile Group Department of Radiology Zhongshan Hospital (Xiamen) Fudan University Xiamen Municipal Clinical Research Center for Medical Imaging Fujian Province Key Clinical Specialty Construction Project (Medical Imaging Department) Xiamen Key Laboratory of Clinical Transformation of Imaging Big Data and Artificial Intelligence School of Computer and Information Engineering Xiamen University of Technology

Magnetic resonance imaging(MrI) plays an important role in medical diagnosis,generating petabytes of image data annually in large *** voluminous data stream requires a significant amount of network bandwidth and extensive storage ***,local data processing demands substantial manpower and hardware *** isolation across different healthcare institutions hinders crossinstitutional collaboration in clinics and *** this work,we anticipate an innovative MrI system and its four generations that integrate emerging distributed cloud computing,6G bandwidth,edge computing,federated learning,and blockchain *** system is called Cloud-MrI,aiming at solving the problems of MrI data storage security,transmission speed,artificial intelligence(AI) algorithm maintenance,hardware upgrading,and collaborative *** workflow commences with the transformation of k-space raw data into the standardized Imaging Society for Magnetic resonance in Medicine raw data(ISMrMrd) ***,the data are uploaded to the cloud or edge nodes for fast image reconstruction,neural network training,and automatic ***,the outcomes are seamlessly transmitted to clinics or research institutes for diagnosis and other *** Cloud-MrI system will save the raw imaging data,reduce the risk of data loss,facilitate inter-institutional medical collaboration,and finally improve diagnostic accuracy and work efficiency.

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Position based in-motion alignment method for an auv

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Journal of Institute of control, robotics and Systems 2020年第8期26卷 649-659页

作者： Choo, Jinwoo Lee, Gwonsoo Lee, Phil-Yeob Kim, Ho Sung Lee, Hansol Park, daegil Lee, Jihong Department of Mechatronics Engineering of Chungnam National University Korea Republic of Naval R&D Center Hanwha Systems Co. Ltd Korea Republic of Autonomous System R&D Center Korea Institute of Robot and Technology Convergence Korea Republic of

This paper describes a position based in-motion alignment method for underwater navigation of an AUV(Autonomous Underwater Vehicle). For proper estimation of the position and orientation of the AUV the navigation algorithm requires accurate initial values of its position and attitude. However, it is difficult to obtain exact attitude of the AUV in the marine environment, because of the AUV’s body drift caused by flow of the water. To avoid this, in general, the initial alignment is performed on shore using gravitational acceleration, with further launching of AUV into the water. In this paper, we propose the in-motion alignment algorithm that is able to accurately estimate azimuth in the marine environment. Additionally, the proposed method allows to correct velocity of the AUV. © ICrOS 2020.

关键词： Autonomous underwater vehicles

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Enhanced electrochemical capture of bromine ions from aqueous solutions using SrBiO 2 Br@PPy: A synergistic electroactive material

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Chemical engineering Science 2025年 316卷

作者： Wenlei Fan Haojie Ge Jinghui Li Lejian Zhang Jianlu Liu Yafei Guo Haobo Zhang Tianlong deng State Key Laboratory of Bio-based Fiber Materials Key Laboratory of Marine Resource Chemistry and Food Technology (TUST) in Ministry of Education College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 P.R. China Technology R&D Centre of Shandong Haihua Group Co. LTD Weifang 262737 P.R. China

conventional techniques for the removal of bromine ions present several challenges, including low efficiency, high operational costs, and the generation of secondary waste. A novel electroactive composite material of SrBiO 2 Br that efficiently captures bromine ions from aqueous solutions has been reported. The composite material combines the photocatalytic properties of SrBiO 2 Br with the conductive nature of polypyrrole (PPy), thereby markedly enhancing the efficiency of bromine ions removal. The integration of SrBiO 2 Br with PPy’s conductive network results in the formation of a composite material that enhances charge separation and transport due to the more compact structure and improved stability of SrBiO 2 Br. The experimental results demonstrate that SrBiO 2 Br@PPy exhibits excellent bromine capture performance under various voltage and pH conditions, along with promising cycling stability. Under neutral conditions (pH = 7), isothermal modeling analyses further confirmed the high adsorption capacity of this material for Br - , with a theoretical maximum adsorption capacity of 190.29 mg/g, and even a maximum adsorption capacity of 260.13 mg/g under acidic conditions. This research contributes to the advancement of water treatment technologies, particularly in the area of bromide ion extraction for the treatment of specific wastewater, such as those from coal processing, and provides new strategies for improving water quality.

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design of control Algorithm of Wheeled robot Based on Wi-Fi and Inertial navigation

Design of Control Algorithm of Wheeled Robot Based on Wi-Fi ...

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Annual conference of Industrial Electronics Society

作者： Zhifeng Wang Heng Xie Zeqin Lin Tao Wen Zhiming Zhen Haichu Chen School of mechanical and electrical engineering Foshan University Foshan China Technology R&D Center Foshan designa technology co. LTD Foshan China

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154152

This paper design a path planning smart car system based on STM32. It can use MPU6050 module to adjust the direction of route and the angle of the turning. Moreover, We use infrared modules and obstacle avoidance algorithms to complete the obstacle avoidance function, and the robot can move along a U-shaped trajectory. While the Wi-Fi module is used as communication to transmit data to the App developed on the Android platform, so as to control the moving distance of the car. We build the software system and the hardware system to test the control algorithm and the ability of avoiding obstacle. The robot runs 20 meters at a speed of 0.3m/s, and it is obtained that its yaw offset is about 1.3 degrees, and its trajectory offset is about 5cm. The results show that the robot can avoid obstacles on the ground and has certain stability, which provides a reference for the further development of a more intelligent robot car.

关键词： robot sensing systems Automobiles collision avoidance Mobile robots Trajectory Sockets Process control

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robust force tracking control via backstepping sliding mode control and virtual damping control for hydraulic quadruped robots

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Journal of Central South University 2020年第9期27卷 2673-2686页

作者： SHEN Wei Lü Xiao-bin MA Chen-jun Department of Mechatronics Engineering University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310000China Libin Technology R&D Center Shanghai Electric Hydraulic&Pneumatics Co.Ltd.Hangzhou 310000China

In order to improve the force tracking performance of hydraulic quadruped robots in uncertain and unstructured environments,an impedance-based adaptive reference trajectory generation scheme is ***,in order to improve the robustness to environmental changes and reduce the contact force errors caused by trajectory tracking errors,the backstepping sliding mode controller is combined with the adaptive reference trajectory ***,a virtual damping control based on velocity and pressure feedback is proposed to solve the problem of contact force disappearance and stall caused by sudden environmental *** simulation results show that the proposed scheme has higher contact force tracking accuracy when the environment is unchanged;the contact force error can always be guaranteed within an acceptable range when the environment is reasonably changed;when the environment suddenly changes,the drive unit can move slowly until the robot re-contacts the environment.

关键词： hydraulic quadruped robot impedance control backstepping sliding mode control virtual damping control

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