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Spatio-temporal Granularity Co-optimization Based Monthly Electricity Consumption Forecasting

CSEE Journal of Power and Energy systems 2023年第5期9卷 1980-1984页

作者： Kangping Li Yuqing Wang Ning Zhang Fei Wang Chunyi Huang the College of Smart Energy Shanghai Jiao Tong UniversityShanghai 200240China the Department of Electrical Engineering Tsinghua UniversityBeijing 100084China the Department of Electrical Engineering North China Electric Power UniversityBaoding 071003China the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University) Beijing 102206China the Hebei Key Laboratory of Distributed Energy Storage and Microgrid(North China Electric Power University) Baoding 071003China the Key Laboratory of Control of Power Transmission and Conversion Ministry of Education(Shanghai Jiao Tong University)Shanghai 200240China

Monthly electricity consumption forecasting(ECF)plays an important role in power system operation and electricity market *** popularity of smart meters enables collection of fine-grained load data,which provides an opportunity for improvement of monthly ECF *** this letter,a spatio-temporal granularity co-optimization-based monthly ECF framework is proposed,which aims to find an optimal combination of temporal granularity and spatial clusters to improve monthly ECF *** framework is formulated as a nested bi-layer optimization problem.A grid search method combined with a greedy clustering method is proposed to solve the optimization *** of the proposed method has been verified on a real smart meter dataset.

关键词： Electricity consumption forecasting Greedy clustering Grid searching Spatiotemporal

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Research on Boot Problem and Automatic Repair of an Embedded Real-time Operating system 2

Research on Boot Problem and Automatic Repair of an Embedded...

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2nd International Conference on Computer Technologies, ICCTech 2023

作者： Zhou, Haoshang Gao, Zhaoling Wang, Zhongfu Wang, Xiaopeng State Key Laboratory for Traction and Control System of EMU and Locomotive CRRC Dalian Electric Traction R&D Center Co. Ltd China School of Intelligence and Electronic Engineering Dalian Neusoft University of Information China

ISBN: (纸本)9781665455824

At present, in the communication between Electric Multiple Units (EMU) and locomotive network control system, in order to ensure the stability of vehicle control and the accuracy and reliability of data recording, its key components - Central control Unit (CCU) and Event Record Machine (ERM) adopt an embedded real-time operation system. In order to facilitate debugging, the system needs to start Microsoft's DOS system before being called to start. Based on the feedback of the embedded real-time operating system startup failure from each locomotive and rolling stock depot, this paper will elaborate on its startup process and propose a solution that can automatically repair the startup problem, which has been tested in the laboratory to prove that this method can effectively avoid the system startup failure. © 2023 IEEE.

关键词： Program debugging

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Multi-Type Electric Vehicle Schedulability Modeling Method based on User Charging Behavior Characteristics 11

Multi-Type Electric Vehicle Schedulability Modeling Method b...

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11th China International Conference on Electricity Distribution, CICED 2024

作者： Xue, Yinjuan Chen, Qifang Cai, Haiqing Xia, Mingchao Gu, Haohan School of Electrical Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&d Centre Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350368345

With the rapid proliferation of Electric Vehicles (EV s), effectively leveraging the regulation potential of EV charging loads has become a prominent issue. This paper proposes a multi-type EV schedulability modeling method based on the analysis of charging behavior characteristics of different user types. The model comprehensively considers the charging characteristics of various types of EV s, including private cars, ride-hailing vehicles, and taxis, utilizing a charging start-stop probability distribution model. Case studies demonstrate that this model can not only accurately reflect the charging demands of EV s but also provide valuable references for strategies involving EV fleet participation in grid regulation. © 2024 IEEE.

关键词： Charging stations

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New WHO global air quality guidelines help prevent premature deaths in China

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National Science Review 2022年第4期9卷 10-12页

作者： Tao Xue Guannan Geng Xia Meng Qingyang Xiao Yixuan Zheng Jicheng Gong Jun Liu Wei Wan Qiang Zhang Haidong Kan Shiqiu Zhang Tong Zhu Institute of Reproductive and Child Health/National Health Commission Key Laboratory of Reproductive Health and Department of Epidemiology and Biostatistics School of Public HealthPeking University State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua University School of Public Health Key Laboratory of Public Health Safety of the Ministry of Educationand Key Laboratory of Health Technology Assessment of the Ministry of HealthFudan University Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental Planning College of Environmental Sciences and Engineering Peking University School of Energy and Environmental Engineering University of Science and Technology Beijing Clean Air Asia Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua University

The air quality guidelines （AQGs） issued by the World Health Organization （WHO） in 2005 are key references for the National Ambient Air Quality Standards （NAAQSs） in *** 22September 2021,the WHO issued new AQGs （NAQGs）[1],which propose more stringent targets to control exposure to multiple air pollutants,including fine particulate matter (PM2.5) and ozone （O3）,to which,in 2019,451 million premature deaths,globally,were attributable [2].

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Distributed Asynchronous Event-Triggered Secondary control of Microgrids with Time-Varying Communication Delays 41

Distributed Asynchronous Event-Triggered Secondary Control o...

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第41届中国控制会议

作者： Kai Zhao Feng Xiao Bo Wei State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University School of Control and Computer Engineering North China Electric Power University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

This paper focuses on the secondary control of the inverter based microgrid,which is essential to overcome the influence of load *** reduce unnecessary communication,a distributed asynchronous event-triggered control algorithm is proposed to recover frequency and voltage,and the time-varying delays in communication channels are *** controllers in energy generation units are designed to work asynchronously,which means that the controllers do not need to check event-triggering conditions *** stability of the proposed algorithm is proved rigorously by the Lyapunov method and the micro grid is simulated in the MATLAB/Simulink environment.

关键词： Secondary control asynchronous event-triggered control time-varying delays

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Adaptive SOM neural network algorithm 3

Adaptive SOM neural network algorithm

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3rd International Conference on Artificial Intelligence, Automation, and High-Performance Computing, AIAHPC 2023

作者： Wang, Xin Yan, Taishan School of Information Science and Engineering Hunan Institute of Science and Technology Hunan Yueyang China Hunan Institute of Science and Technology School of Information Science and Engineering China Key Laboratory of Hunan Province on Intelligent Control and Optimization of Complex Industrial Logistics System Hunan Yueyang China

ISBN: (数字)9781510666580

ISBN: (纸本)9781510666573

In order to improve the performance of traditional SOM model, an adaptive SOM neural network algorithm is proposed. By introducing the error square sum solution formula, the clustering error of the model sub-data set is calculated by using the method of cutting the data set, and the change trend of the clustering error is quickly obtained. Then the learning rate of the SOM network is adaptively adjusted according to this, and the convergence speed is accelerated on the basis of ensuring that the network is fully trained, thereby improving the performance of the SOM network. © 2023 SPIE.

关键词： Errors

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Resilient Cooperative control of Multiple DC Microgrids With Interconnection Networks Against Cyber Attacks

IEEE Transactions on Industrial Cyber-Physical Systems

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IEEE Transactions on Industrial Cyber-Physical systems 2025年 3卷 116-126页

作者： Xiao, Feng Liu, Shiyu Wei, Bo Fang, Fang Qin, Jiahu North China Electric Power University State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing102206 China North China Electric Power University School of Control and Computer Engineering Beijing102206 China North China Electric Power University New Energy Generation National Engineering Research Center Beijing102206 China University of Science and Technology of China Department of Automation Hefei230027 China

The two control objectives of voltage regulation and precise current sharing are conflicting in multi-bus DC microgrids. In this paper, a distributed control strategy is proposed, and it can achieve accurate current sharing and regulate the voltage of a critical node to the rated value. However, such a distributed control system is susceptible to potential cyber attacks that could deteriorate microgrids performances by corrupting communication links or actuators. To overcome these difficulties, we design the interconnected communication networks to establish a resilient cooperative system of multiple microgrids against unknown bounded injection attacks. The proposed resilient control strategy can achieve the control objectives of maintaining voltage regulation and current sharing within each microgrids under different operating conditions, and the interconnected system consisting of multiple microgrids cooperates to mitigate the adverse effect of cyber attacks. The dynamics and stability of the overall close-loop system of the DC microgrids are analyzed, in the present or absent of cyber attacks. Simulation results validate the effectiveness of the proposed approach in two 4-bus DC microgrids. © 2023 IEEE.

关键词： Cyber attacks

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First high-frequency pulse tube cryocooler down to 2.5 K and its promising application in China’s deep space exploration

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Science China(Technological Sciences) 2023年第8期66卷 2454-2456页

作者： YANG Biao GAO ZhaoZhao CHEN LiuBiao LIU SiXue ZHOU Qiang GUO Jia CUI Chen ZHU WenXiu JIN Hai ZHOU Yuan WANG JunJie Chinese Academy of Sciences Key Laboratory of Technology on Space Energy ConversionTechnical Institute of Physics and ChemistryBeijing 100190China Beijing Key Laboratory of Space Thermal Control Technology Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing 100094China Department of Astronomy Tsinghua UniversityBeijing 100084China Chinese Academy of Sciences Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

From the Moon,Mars,to the central body of the solar system,the Sun,and even exoplanets,deep space exploration[1]has promoted research on the formation and evolution of the solar system and the universe,especially,in terms of tracing life’s *** inherent characteristic of high energy flux density determines that space detectors cannot fully dissipate heat through radiative cooling under the cosmic microwave background radiation temperature of 2.7 K.

关键词： planet universe microwave

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Brain-inspired Intelligent Robotics:Theoretical Analysis and systematic Application

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Machine Intelligence Research 2023年第1期20卷 1-18页

作者： Hong Qiao Ya-Xiong Wu Shan-Lin Zhong Pei-Jie Yin Jia-Hao Chen The State Key Laboratory of Management and Control for Complex System Institute of AutomationChineseAcademyof SciencesBeijing100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Chinese Academy of Science Center for Excellence in Brain Science and Intelligence Technology Shanghai 200031China School of Mechanical Engineering University of Science and Technology BeijingBeijing 100083China

Traditional joint-link robots have been widely used in production lines because of their high precision for single *** the development of the manufacturing and service industries,the requirement for the comprehensive performance of robotics is *** types of bio-inspired robotics have been investigated to realize human-like motion control and manipulation.A study route from inner mechanisms to external structures is proposed to imitate humans and animals *** this idea,a brain-inspired intelligent robotic system is constructed that contains visual cognition,decision-making,motion control,and musculoskeletal *** paper reviews cutting-edge research in brain-inspired visual cognition,decision-making,motion control,and musculoskeletal *** software systems and a corresponding hardware system are established,aiming at the verification and applications of next-generationbrain-inspired musculoskeletal robots.

关键词： Brain-inspired intelligent robot software and hardware decision making muscle control cognitive intelligence.

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Study of Residual Stress Distribution in Car Body Welds Based on X-Ray Diffraction Method 12

Study of Residual Stress Distribution in Car Body Welds Base...

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12th International Conference on Quality, Reliability, Risk, Maintenance, and Safety engineering, QR2MSE 2022

作者： Zhang, Ruijin He, Jiabao Ju, Zhihang Tang, Haichao Key Laboratory of Vibration and Control of Aero-Propulsion System of Ministry of Education Northeastern University Shenyang China School of Mechanical Engineering and Automation Northeastern University Shenyang China

ISBN: (纸本)9781839538360

Welding residual stress has a significant influence on the initiation and propagation of fatigue cracks in welded structures. It is important to determine the distribution of residual stress in welding parts when the fatigue life is evaluated. The specimen of aluminum butt welding seam was taken from the car body of high speed train, and surface residual stress was measured by using X-ray diffraction method. The results show that there are obvious differences in the uniformity and diffraction peak intensity of the Debye ring of different parts of specimen. Along the line perpendicular to the weld, the distributions of residual stress appear bimodal shape. The peak values appear in the weld near to base metal and the valley value appears in the center of the weld. The maximum value of longitudinal residual stress is far higher than that of the transverse residual stress. The welding boundary has few effect on the residual stress by measuring the residual stress at different distances from the welding free boundary. © 2022 IEEE.

关键词： X ray diffraction

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