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基于多通道忆阻脉冲耦合神经网络的多帧图像超分辨率重建算法

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电子与信息学报 2020年第4期42卷 835-843页

作者：董哲康杜晨杰林辉品赖俊昇胡小方段书凯杭州电子科技大学电子信息学院杭州310018 浙江大学电气工程学院杭州310027 牛津大学工程科学系英国牛津OX13PJ 西南大学人工智能学院重庆400715

高清晰度的图像是信息获取和精确分析的前提,研究多帧图像的超分辨率重建能够有效解决因外部拍摄环境引起的图像细节丢失、边缘模糊等问题。该文基于纳米级忆阻器,设计一种多通道忆阻脉冲耦合神经网络模型(MMPCNN),能够有效模拟网络中... 详细信息

高清晰度的图像是信息获取和精确分析的前提,研究多帧图像的超分辨率重建能够有效解决因外部拍摄环境引起的图像细节丢失、边缘模糊等问题。该文基于纳米级忆阻器,设计一种多通道忆阻脉冲耦合神经网络模型(MMPCNN),能够有效模拟网络中连接系数的动态变化,解决神经网络中固有的参数估计问题。同时,将提出的网络应用于多帧图像超分辨率重建中,实现低分辨率配准图像的融合操作,并通过基于稀疏编码的单帧图像超分辨率重构算法对获得的初始高分辨率图像进行优化。最终,一系列计算机仿真及分析(主观/客观分析)验证了该文提出方案的正确性和有效性。

关键词：忆阻器脉冲耦合神经网络多帧图像超分辨率重建

Bi-level Optimal Planning of Voltage Regulator in Distribution Systems Considering Maximization of Incentive-based Photovoltaic Energy Integration

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2008-2017页

作者： Xu Xu Youwei Jia chun sing lai Minghao Wang Zhao Xu Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhenChina Department of Electrical Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Department of Electrical and Electronic Engineering University Key Laboratory of Advanced Wireless Communications of Guangdong ProvinceSouthern University of Science and TechnologyShenzhen 515100China Department of Electronic and Computer Engineering Brunel Institute of Power SystemsBrunel University LondonLondonUB83PH United Kingdom Department of Electrical Engineering Shenzhen Research InstituteThe Hong Kong Polytechnic UniversityHung HomHong Kong SARChina

This paper focuses on optimal voltage regulator(VR)planning to maximize the photovoltaic(PV)energy integration in distribution *** describe the amount of dynamic PV energy that can be integrated into the power system,the concept of PV accommodation capability(PVAC)is introduced and modeled with *** proposed planning model is formulated as a Benders decomposition based bi-level stochastic optimization *** the upper-level problem,VR planning decisions and PVAC are determined via mixed integer linear programming(MILP)before considering *** in the lower-level problem,the feasibility of first-level results is checked by critical network constraints(*** magnitude constraints and line capacity constraints)under uncertainties considered by time-varying loads and PV *** this paper,these uncertainties are represented in the form of operational scenarios,which are generated by the Gaussian copula theory and reduced by a well-studied backward-reduction *** modified IEEE 33-node distribution grid is utilized to verify the effectiveness of the proposed *** results demonstrate that a PV energy integration can be significantly enhanced after optimal voltage regulator planning.

关键词： Bi-level stochastic optimization problem critical network constraints photovoltaic energy integration uncertainties voltage regulator planning

Robust N−k Security-constrained Optimal Power Flow Incorporating Preventive and Corrective Generation Dispatch to Improve Power System Reliability

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 351-364页

作者： Liping Huang chun sing lai Zhuoli Zhao Guangya Yang Bang Zhong Loi Lei lai School of Automation Guangdong University of TechnologyGuangzhou 510006China School of Automation Guangdong University of TechnologyGuangzhou 510006Chinaand also with the Department of Electronic and Electrical EngineeringBrunel University LondonLondonUB83PHUK Center for Electric Power System and Energy Department of Electrical EngineeringTechnical University of DenmarkKongens Lyngby 2800Demark Zhaoqing Power Supply Bureau Guangdong Power Grid CompanyChina Southern Power GridZhaoqing 526020China

As extreme weather events have become more frequent in recent years,improving the resilience and reliability of power systems has become an important area of *** this paper,a robust preventive-corrective security-constrained optimal power flow(RO-PCSCOPF)model is proposed to improve power system reliability under N−k *** the short-term emergency limit(STL)and the long-term operating limit(LTL)of the post-contingency power flow on the branch are *** with the existing robust corrective SCOPF model that only considers STL or LTL,the proposed ROPCSCOPF model can achieve a more reliable generation dispatch *** addition,this paper also summarizes and compares the solution methods for solving the N−k SCOPF *** computational efficiency of the classical Benders decomposition(BD)method,robust optimization(RO)method,and line outage distribution factor(LODF)method are investigated on the IEEE 24-bus Reliability Test System and 118-bus *** results show that the BD method has the worst computation *** RO method and the LODF method have comparable ***,the LODF method can only be used for the preventive SCOPF and not for the corrective *** RO method can be used for both.

关键词： Benders cut bender decomposition line outage distribution factor N−k security criterion optimal power flow power system reliability resilience robust optimization

A retroactive approach to microgrid real-time scheduling in quest of perfect dispatch solution

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Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1608-1618页

作者： Youwei JIA Xue LYU chun sing lai Zhao XU Minghua CHEN Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhenChina Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina Department of Electrical Engineering School of AutomationGuangdong University of TechnologyGuangzhouChina School of Civil Engineering Faculty of EngineeringUniversity of LeedsLeedsUK The Chinese University of Hong Kong Hong KongChina

As an emerging paradigm in distributed power systems,microgrids provide promising solutions to local renewable energy generation and load demand ***,the intermittency of renewables and temporal uncertainty in electrical load create great challenges to energy scheduling,especially for small-scale *** of deploying stochastic models to cope with such challenges,this paper presents a retroactive approach to real-time energy scheduling,which is prediction-independent and computationally *** case studies were conducted using 3-year-long real-life system data,and the results of simulations show that the cost difference between the proposed retroactive approach and perfect dispatch is less than 11%on average,which suggests better performance than model predictive control with the cost difference at 30%compared to the perfect dispatch.

关键词： Microgrid Renewables Real-time scheduling Perfect dispatch Grid integration

Electric Vehicle Charging Scheduling Strategy for Supporting Load Flattening Under Uncertain Electric Vehicle Departures

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Journal of Modern Power Systems and Clean Energy 2023年第5期11卷 1634-1645页

作者： Han Wang Mengge Shi Peng Xie chun sing lai Kang Li Youwei Jia IEEE Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China School of Electronic and Electrical Engineering University of LeedsLeedsLS29JTUK Brunel Interdisciplinary Power Systems Research Centre Department of Electronic and Electrical EngineeringBrunel University LondonLondon UB83PHUK

The scheduled electric vehicle(EV)charging flexibility has great potential in supporting the operation of power systems,yet achieving such benefits is challenged by the uncertain and user-dependent nature of EV charging *** research primarily focuses on modeling the uncertain EV arrival and battery status yet rarely discusses the uncertainty in EV *** this paper,we investigate the EV charging scheduling strategy to support load flattening at the distribution level of the utility grid under uncertain EV departures.A holistic methodology is proposed to formulate the unexpected trip uncertainty and mitigate its negative *** ensure computational efficiency when large EV fleets are involved,a distributed solution framework is developed based on the alternating direction method of multipliers(ADMM)*** numerical results reveal that unexpected trips can severely damage user convenience in terms of EV energy *** is further confirmed that by applying the proposed methodology,the resultant critical and sub-critical user convenience losses due to scheduled charging are reduced significantly by 83.5%and 70.5%,respectively,whereas the load flattening performance is merely sacrificed by 17%.

关键词： Electric vehicle(EV) EV fleet uncertain departure user convenience distributed solution

基于局部粒子群算法的家庭用电负荷优化控制策略

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广东工业大学学报 2019年第6期36卷 66-73页

作者：吴丹琦赖俊升杨俊华李学聪赖来利熊锋俊广东工业大学自动化学院广东广州510006 英国利兹大学工程学院西约克郡利兹LS29JT

提出一种分时电价政策下电能总花费最低的家庭用电负荷优化控制策略.采用局部粒子群算法对家庭中4类常见用电负荷的花费进行优化,与无优化处理和传统粒子群算法进行对比分析,并在Python平台上搭建数学模型和开展仿真实验.结果表明,局部... 详细信息

提出一种分时电价政策下电能总花费最低的家庭用电负荷优化控制策略.采用局部粒子群算法对家庭中4类常见用电负荷的花费进行优化,与无优化处理和传统粒子群算法进行对比分析,并在Python平台上搭建数学模型和开展仿真实验.结果表明,局部粒子群算法可大幅度减少家庭用电花费,具有全局搜索能力强、收敛速度快等优点,可推广应用到家庭能源管理领域相关研究.

关键词：家庭能源管理分时电价仿真实验局部粒子群算法

Pathogenesis, diagnosis, and treatment of epilepsy: electromagnetic stimulation-mediated neuromodulation therapy and new technologies

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Neural Regeneration Research 2025年第4期20卷 917-935页

作者： Dian Jiao lai Xu Zhen Gu Hua Yan Dingding Shen Xiaosong Gu Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang UniversityHangzhouZhejiang ProvinceChina Affiliated Hospital of Nantong University NantongJiangsu ProvinceChina

Epilepsy is a severe,relapsing,and multifactorial neurological *** regarding the accurate diagnosis,prognosis,and in-depth pathogenesis are crucial for the precise and effective treatment of *** pathogenesis of epilepsy is complex and involves alterations in variables such as gene expression,protein expression,ion channel activity,energy metabolites,and gut microbiota *** results are lacking for conventional treatments for *** resection of lesions,drug therapy,and non-drug interventions are mainly used in clinical practice to treat pain associated with ***-pharmacological treatments,such as a ketogenic diet,gene therapy for nerve regeneration,and neural regulation,are currently areas of research *** review provides a comprehensive overview of the pathogenesis,diagnostic methods,and treatments of *** also elaborates on the theoretical basis,treatment modes,and effects of invasive nerve stimulation in neurotherapy,including percutaneous vagus nerve stimulation,deep brain electrical stimulation,repetitive nerve electrical stimulation,in addition to non-invasive transcranial magnetic stimulation and transcranial direct current *** studies have shown that electromagnetic stimulation-mediated neuromodulation therapy can markedly improve neurological function and reduce the frequency of epileptic ***,many new technologies for the diagnosis and treatment of epilepsy are being ***,current research is mainly focused on analyzing patients’clinical manifestations and exploring relevant diagnostic and treatment methods to study the pathogenesis at a molecular level,which has led to a lack of consensus regarding the mechanisms related to the disease.

关键词： diagnosis drug treatment electroencephalography epilepsy monitoring epilepsy nerve regeneration neurostimulation non-drug interventions pathogenesis prediction

Modeling,Oscillation Analysis and Distributed Stabilization Control of Autonomous PV-based Microgrids

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CSEE Journal of Power and Energy Systems 2023年第3期9卷 921-936页

作者： Zhuoli Zhao Jindian Xie Shaoqing Gong Xi Luo Yuewu Wang chun sing lai Ping Yang Loi Lei lai Josep M.Guerrero Department of Electrical Engineering School of AutomationGuangdong University of TechnologyGuangzhou 510006China School of Automation Guangxi University of Science and TechnologyLiuzhou 545006China Department of Electronic and Electrical Engineering Brunel University LondonLondon UB83PHUK Key Laboratory of Clean Energy Technology of Guangdong Province South China University of TechnologyGuangzhou 510640China Department of Energy Technology Aalborg University9220 AalborgDenmark

Driven by rising energy demand and the goal of carbon neutrality,renewable energy generations(REGs),especially photovoltaic(PV)generations,are widely used in the urban power energy *** the intelligent control of microgrids(MG)brings economic and efficient operation,its potential stability problem cannot be *** date,most of the research on modeling,analyzing and enhancing the stability of MG usually assume the DC-link as an ideal voltage ***,this practice of ignoring the dynamics of DC-link may omit the latent oscillation phenomena of autonomous PV-based ***,this paper establishes a complete dynamic model of autonomous PV-based MG including PV panels and *** from previous conclusions of idealizing DC-link dynamics,participation factor analysis finds the potential impact of DClink dynamics on system dynamic performance,and different influence factors including critical control parameters and nonlinear V-I output characteristic of PV array are considered to further reveal oscillation ***,based on the average consensus algorithm,a distributed stabilization controller with strong robustness is proposed to enhance stability of the PVbased MG,which does not affect the steady-state performance of the ***,the correctness of all theoretical analysis and the effectiveness of the proposed controller are verified by time domain simulation and hardware-in-loop tests.

关键词： Average consensus algorithm distributed stabilization microgrid oscillation photovoltaic(PV)generation stability analysis

A Criterion for Elliptic Curves with Second Lowest 2-Power in L(1)(Ⅱ)

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Acta Mathematica Sinica,English Series 2005年第5期21卷 961-976页

作者： chun lai ZHAO LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

Let D = p1p2 …pm, where p1,p2, ……,pm are distinct rational primes with p1 ≡p2 ≡3（mod 8）, pi =1（mod 8）（3 ≤ i ≤ m）, and m is any positive integer. In this paper, we give a simple combinatorial criterion for the value of the complex L-function of the congruent elliptic curve ED2 ： y^2 = x^3- D^2x at s = 1, divided by the period ω defined below, to be exactly divisible by 2^2m-2, the second lowest 2-power with respect to the number of the Gaussian prime factors of D. As a corollary, we obtain a new series of non-congruent numbers whose prime factors can be arbitrarily many. Our result is in accord with the predictions of the conjecture of Birch and Swinnerton-Dyer.

关键词： Elliptic curve L-function Congruent number BSD conjecture