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AdaBoosting Neural Network for Short-Term Wind Speed Forecasting Based on Seasonal Characteristics Analysis and Lag Space Estimation

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Computer Modeling in engineering & Sciences 2018年第3期114卷 277-293页

作者： Haijian Shao Xing Deng School of Computer Science and Engineering Jiangsu University of Science and TechnologyJiangsuZhenjiang212003China School of Automation Key Laboratory of Measurement and Control for CSEMinistry of EducationSoutheast UniversityJiangsu210096NanjingChina

High accurary in wind speed forcasting remains hard to achieve due to wind’s random distribution nature and its seasonal ***,intermittent and nonstationary usually cause the portion problem of the wind speed *** characteristics of wind speed means that its feature distribution is *** typically results that the persistence of excitation for modeling can not be guaranteed,and may severely reduce the possibilities of high precise forecasting *** this paper,we proposed two effective solutions to solve the problems caused by the randomness and seasonal characteristics of the wind speed.(1)Wavelet analysis is used to extract the robust components of time series and reduce the influence of randomness.(2)Based on the energy distribution about the extracted amplitude and associated frequency,seasonal characteristics of wind speed are analyzed based on self-similarity in periodogram under scales range generated by wavelet ***,the original dataset is reasonably divided into subsest which can effectively reflect the seasonal distribution characteristics of wind *** addition,two strategies are given to optimal model structure and improve the forecasting accuracy:(1)The forecasting model’s lag space is approximately estimated by the Lipschitz quotient to improve the generality ability of the feedforward neural network.(2)The forecasting accuracy and model robustness are further improved by the wavelet decomposition combined with AdaBoosting neural ***,experimental evaluation based on the dataset from National Renewable Energy Laboratory(NREL)is given to demonstrate the performance of the proposed approach.

关键词： Wind speed forecasting seasonal characteristics analysis wavelet analysis lipschitz quotient

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DC Bus Voltage Regulation for Distributed Energy Sources through Buck-Boost Converter in a Direct Current Micro Grid

DC Bus Voltage Regulation for Distributed Energy Sources thr...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Solangi, Asif Raza Huang, Qi Raza, Ghalib Abbas, Muneer Solangi, Siraj Hyder Sichuan Provincial Key Lab of Power System Wide -Area Measurement and Control School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China China Benazir Bhutto Shaheed University of Technology and Skill Development Khairpur Pakistan Indus University Karachi Pakistan University of Sindh Jamshoro Pakistan

ISBN: (纸本)9781728135205

Direct current micro-grid (DCMG) based on renewable energy sources (RES) is facing an issue of maintaining standard voltage at DC bus under variable power generation and utilization. This paper proposes the DCMG based on distributed energy sources (DES) and buck-boost converter to maintain standard voltage at DC bus. Photovoltaic panel (PV), wind turbine (WT) and battery are utilized as DES. PV, battery and WT are linked to DC bus through buck-boost converter. The simulation model of PV and WT has been developed using MULTISIM simulation tool. To measure the performance of the designed system, the DC load of 500 watt has been organized for DCMG system. The protection from reverse current flow and over voltage is also provided. The simulation outcomes verified that, at DC bus standard voltage has been maintained for both utilization and generation. © 2019 IEEE.

关键词： Wind turbines

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H∞ Static Output control of Discrete-Time Networked control Systems with an Event-Triggered Scheme

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Circuits, Systems, and Signal Processing 2018年第2期37卷 553-568页

作者： Yan, Shen Zhang, Guangming Li, Tao Shen, Mouquan Li, Lingchun College of Electrical Engineering and Control Science Nanjing Technology University Nanjing211816 China School of Information and Control Nanjing University of Information Science and Technology NanjingJiangsu210044 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing210096 China

This paper is devoted to the event-triggered H∞ static output feedback control of linear discrete-time networked control systems. With the help of zero-holder, a time-delay formulation is adopted to describe the even-triggered output. Resorting to Finsler lemma and time-delay techniques, a co-design framework of event-triggering communication and static output controller is established in terms of linear matrix inequalities. Meanwhile, the required H∞ performance could be ensured by the proposed framework. Two examples are supplied to verify the validity of the proposed method. © 2017, Springer Science+Business Media New York.

关键词： Networked control systems

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A Scattered Wave Deceptive Jamming Method Based on Genetic Algorithm against Three Channel SAR GMTI

A Scattered Wave Deceptive Jamming Method Based on Genetic A...

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IEEE International Conference on Radar

作者： Xin Chang Yanbin Li Yan Zhao Yufeng Du Donghui Liu Jun Wan Electronics Technology Group Corporation (CETC54) Hebei Key Laboratory of Electromagnetic Spectrum Cognition and Control The 54th Research Institute of China Shijiazhuang China Electronics Technology Group The 54th Research Institute of China Corporation (CETC54) Shijiazhuang China School of Economics and Management Shijiazhuang Tiedao University Shijiazhuang China Chongqing Key Laboratory of Space Information Network and Intelligent School of Microelectronics and Communication Engineering Chongqing University Information Fusion Chongqing University Chongqing China

ISBN: (纸本)9781665468893

To reduce difficulty of obtaining jamming parameters, combining scattered wave deception jamming method structure with genetic algorithm, a scattered wave deceptive jamming method based on genetic algorithm is proposed against three Channel SAR GMTI. Four-dimensional jamming parameter searching problem is separated as a one-dimensional optimization problem and a two-dimensional optimization problem, which will reduce computational burden and jamming parameter acquirement time and raise fidelity of deceptive jamming. In addition, the problem, that tolerance of Doppler rate mismatch is difficult to describe, is solved by transforming an objective function of the two-dimensional optimization problem. By utilizing jamming quality parameters, simulation experiments are provided to verify the effectiveness of SGA method against the three-channel SAR GMTI.

关键词： Azimuth Computational modeling Radar antennas Search problems Linear programming Doppler effect Jamming

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Highly efficient storage of cavity SPDC single photons in room temperature gradient echo memory

APL Quantum

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APL Quantum 2024年第3期1卷

作者： Anthony C. Leung W. Y. Sarah Lau Aaron D. Tranter Karun V. Paul Markus Rambach Ben C. Buchler Ping Koy Lam Andrew G. White Till J. Weinhold ARC Centre of Excellence for Quantum Computation and Communication Technology Sydney NSW 2052 Australia Department of Quantum Science and Technology Research School of Physics The Australian National University Acton ACT 2601 Australia Quantum Measurement Lab Blackett Laboratory Imperial College London London SW7 2BW United Kingdom ARC Centre of Excellence for Engineered Quantum Systems Brisbane QLD 4072 Australia School of Maths and Physics University of Queensland Brisbane QLD 4072 Australia Institute of Materials Research and Engineering Agency for Science Technology and Research (ASTAR) 2 Fusionopolis Way 08-03 Innovis 138634 Singapore

Efficient quantum memories will be an essential building block of large-scale networked quantum systems and provide a link between flying photonic qubits and atomic or quasi-atomic local quantum processors. Memory efficiencies above 50% are required to be operating above the quantum no-cloning limit. High efficiency operation necessitates tailored photon source and memory pairs with matched bandwidths. In this paper, we explore the combination of an ultralow spectral bandwidth source of single photons from cavity-enhanced spontaneous parametric down-conversion with a hot gas-ensemble atomic memory. Our rubidium vapor gradient echo memory achieves 84% ± 3% recall efficiency of single photons: a record for single photon storage in a warm vapor platform that avoids bulky and complex systems, such as high vacuum and low temperature cryogenics.

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Local spin-state manipulation of iron single-atom sites induced by sulfur modification to boost Fenton-like reaction

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Chinese Chemical Letters 2025年

作者： Lina Zou Dengke Wang Shiqin Lai Xunheng Jiang Siqi Chen Lanqing Deng Dong Fan Hengshuai Li Zhigang Zhou Denglong Chen Xiangyang Yao Jianping Zou National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization Nanchang Hangkong University Nanchang 330063 China College of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China School of Physics Science and Information Technology & Shandong Key Laboratory of Optical Communication Science and Technology Liaocheng University Liaocheng 252000 China Quangang Research Institute of Petrochemical Technology Fujian Normal University Fuzhou 350007 China Fujian Longking New Land Tech Co. Ltd. Fuzhou 350015 China

A strategy based on local spin-state manipulation was achieved through S-modification on single-Fe-atom catalysts (Fe 1 -NSC). Spectral analyses and theoretical calculations elucidated that a medium-spin reconfiguration of Fe species in Fe 1 -NSC endowed an increased orbital overlap between Fe-3d and O-2p, reinforcing the peroxymonosulfate (PMS) dissociation kinetics. Consequently, Fe 1 -NSC delivered excellent performance in PMS conversion and pollutant degradation. The specific activity of PMS activation over Fe 1 -NSC reached 36.1 × 10 -3 L min -1 m -2 , 4.2-folds that of Fe 1 -NC (8.61 × 10 -3 L min -1 m -2 ) and superior to the state-of-the-art catalysts reported to date. Importantly, the atomic spin-state modulation via S-modification can extend to other metals (Mn, Co and Cu) for improved PMS activation with > 3 times higher than those without S-modification. This work provides a universal scheme for electronic configuration regulation and highlights the significance of local environment modulation in designing high-performance catalysts for PMS activation.

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control method for EV charging and discharging in V2G/V2H scenario based on the synchronvter technology and H∞ repetitive control

Control method for EV charging and discharging in V2G/V2H sc...

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作者： Liu, Dongqi Zeng, Xiangjun Liu, Guorong Hunan Province Key Laboratory of Smart Grids Operation and Control Changsha University of Science and Technology Changsha China College of Electrical and Information Engineering Hunan University Changsha China School of Computer and Communication Hunan Institute of Engineering Xiangtan China

Electric vehicles (EVs) will play a vital role in the future's transportation systems since this technology is promising for environment, energy security, and improved fuel economy. EVs have huge potential of serving as the energy storage for the power grid as well as inhabitants in vehicle-to-grid (V2G) or vehicle-to-house (V2H) scenario. In this study, a control method is proposed for EV charging and discharging by using the synchronverter technology and H∞ repetitive controller, where synchronverter technology is used to generate the reference voltage to decide the power angle and amplitude of the AC side voltage of the charging/discharging port, so that the power flow between EV and the grid is controlled. In order to ensure the power quality of EVs provided for the grid and the load while EVs are with local loads, a H∞ repetitive controller is designed to control the voltage between EVs and the grid to follow the reference voltage. Simulation results have shown that the proposed controller is not only able to realise bi-directional real power and reactive power control, but also keep the output voltage of EVs in V2G or V2H scenario stable and clear while they are with different kinds of local loads. © 2019 Institution of engineering and *** right reserved.

关键词： Fuel economy

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Modulation Recognition of Composite Signal Based on ResNet and Frequency Domain Graph

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Journal of Physics: Conference Series 2021年第1期2025卷

作者： Lijun Wang Yu Han Hongfang Ge Yongkuan Zhao Lei Shen Science and Technology on Communication Information Security Control Laboratory Jiaxing China The 36th Research Institute of China Electronics Technology Group Corporation Jiaxing China School of Communication Engineering Hangzhou Dianzi University Hangzhou China

Aiming at the problem of composite signal recognition in measurement and control system, a modulation recognition method of composite signal is proposed based on clipped internal modulation signal frequency image and residual network. Residual network has the advantages of fast convergence and high recognition accuracy, which is used to realize the recognition of different modulation modes and different bandwidth signals. The experimental results show that, compared with the traditional decision tree algorithm and the constellation based CNN recognition algorithm, the recognition performance of the proposed method is improved by more than 3dB for the variable bandwidth composite modulation signal set (BPSK-FM and QPSK-FM with internal modulation bandwidth of 128kHz, BPSK-FM and QPSK-FM with internal modulation bandwidth of 2kHz and 2FSK-FM with internal modulation bandwidth of 32kHz and 2kHz).

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Original Structural and Electrical Investigation for a New $\mathbf{BG-F}_{6}$ Vitreous Bio-Ceramic as Humidity Sensors

Original Structural and Electrical Investigation for a New $...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： A. Gharbi A.Y. Kallel A. Bouhamed A. Al-Hamry O. Kanoun N. Derbel University of Paris 1 LSPM CNRS-UPR 9001 PRES Sorbonne Paris Cité Villetaneuse France Technische Universittä t Chemnitz Chair for Measurement and Sensor Technology Chemnitz Germany University of Sfax Control & Energy Management Laboratory National Engineering School of Sfax Tunisia

ISBN: (数字)9781728110806

ISBN: (纸本)9781728110813

Two biomaterial types have been the focus of sensor applications: Fluorosilicate bioactive Glass BG-F 6 crude and compact. Of the two, BG-F 6 compact material show the greater mechanical strength, and electrical behaviour provoke greater humidity sensing capacity. Thus, the glassy discs show great potential for deployment in a new generation of biosensors and environment requires. The aim of this paper is to develop a material that combines an interesting mechanical strength, monophasic stability with potential thermic resistance and great electrical capacity. By returning to its high temperature synthesis protocol, makes this fluorosilicate glass an attractive material for sensors development topic and environmental precautions.

关键词： Water Temperature sensors Electric potential Humidity Glass Ceramics Thermal stability

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Flexible PDMS-based triboelectric nanogenerator for instantaneous force sensing and human joint movement monitoring

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Science China Materials 2019年第10期62卷 1423-1432页

作者： Junbin Yu Xiaojuan Hou Min Cui Shuzheng Shi Jian He Yawei Sun Chao Wang Xiujian Chou Science and Technology on Electronic Test and Measurement Laboratory School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China School of Mechanical Engineering Hebei University of ArchitectureZhangjiakou 075000China North Information Control Research Academy Group Co. LtdNanjing 211100China

Flexible wearable sensors with excellent electric response and self-powered capability have become an appealing hotspot for personal healthcare and human-machine ***,based on triboelectric nanogenerator(TENG),a flexible self-powered tactile sensor composed of micro-frustum-arrays-structured polydimethylsiloxane(PDMS)film/copper(Cu)electrodes,and poly(vinylidenefluoride-trifluoroethylene)(P(VDF-TrFE))nanofibers has been *** TENG-based self-powered tactile sensor can generate electrical signals through the contact-separation process of two triboelectric layers under external mechanical *** to the uniform and controllable micro-frustum-arrays structure fabricated by micro-electro-mechanical system(MEMS)process and the P(VDF-TrFE)nanofibers fabricated by electrostatic spinning,the flexible PDMS-based sensor presents high sensitivity of 2.97 V kPa^-1,stability of 40,000 cycles(no significant decay),response time of 60 ms at 1 Hz,low detection pressure of a water drop(~4 Pa,35 mg)and good linearity of 0.99231 in low pressure *** the PDMS film presents ultra-flexibility and excellent-biocompatibility,the sensor can be comfortably attached on human ***,the tactile sensor can recognize various types of human body movements by the corresponding electrical ***,the as-prepared TENGs are potential on the prospects of gesture detection,health assessment,human-machine interfaces and so on.

关键词： self-powered triboelectric nanogenerator wearable sensor MEMS process personal healthcare

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