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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

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Transactive Energy Trading in Reconfigurable Multi-carrier Energy Systems

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 67-76页

作者： Yifei Wang Zhiheng Huang Zhenhao Li Xi Wu loi lei lai Fangyuan Xu School of Automation Guangdong University of TechnologyGuangzhouChina School of Electrical Engineering Southeast UniversityNanjingChina

The penetration of multi-carrier energy systems in distribution system gains more and more *** this paper,a bi-level transactive energy trading framework is proposed to improve the energy scheduling and operation efficiency for multi-carrier energy systems which are modeled as energy hubs(EHs).In the upper level,each EH in the distribution system not only makes energy scheduling decisions considering supplies and demands of local energy,but also trades energy with each other to further maximize their social *** associated trading payment among EHs is made in a fair manner by applying Nash bargaining *** solve the bargaining problem by decomposing it into two subproblems:operation cost minimization problem and payment bargaining ***,based on the trading decision,the nodal equivalent loads of EHs are sent to the distribution system operator(DSO)without publishing trading *** applying the second-order cone programming(SOCP),DSO reconfigures the network to reduce the transmission loss of the system in the lower *** network reconfiguration and the trading behavior of EHs interact and iterate until the *** studies on modified IEEE 33-bus distribution system demonstrate the effectiveness of the proposed framework.

关键词： Multi-carrier energy system energy hub(EH) transactive energy distribution reconfiguration Nash bargaining

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Operation Cost Optimization Method of Regional Integrated Energy System in Electricity Market Environment Considering Uncertainty

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Journal of Modern Power Systems and Clean Energy 2023年第1期11卷 368-380页

作者： Peng Li Fan Zhang Xiyuan Ma Senjing Yao Yuhang Wu Ping Yang Zhuoli Zhao loi lei lai Digital Grid Research Institute of China Southern Power Grid Guangzhou 510663China Guangdong Key Laboratory of Clean Energy Technology South China University of TechnologyGuangzhou 510640China Department of Electrical Engineering School of AutomationGuangdong University of TechnologyGuangzhou 510006China IEEE

In the electricity market environment,the regional integrated energy system(RIES)can reduce the total operation cost by participating in electricity market ***,the RIES will face the risk of load and electricity price uncertainties,which may make its operation cost higher than *** paper proposes a method to optimize the operation cost of the RIES in the electricity market environment considering ***,based on the operation cost structure of the RIES in the electricity market environment,the energy flow relationship of the RIES is analyzed,and the operation cost model of the RIES is ***,the electricity purchase costs of the RIES in the medium-and long-term electricity markets,the spot electricity market,and the retail electricity market are ***,considering the risk of load and electricity price uncertainties,the operation cost optimization model of the RIES is established based on conditional *** it is solved to obtain the operation cost optimization strategy of the *** results show that the proposed operation cost optimization method can reduce the operation cost of high electricity price scenario by optimizing the energy purchase and distribution strategy,constrain the risk of load and electricity price uncertainties,and help balance the risks and benefits.

关键词： Conditional value-at-risk electricity market uncertainty operation cost regional integrated energy system(RIES).

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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

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Pharmacological Effects of Botanical Drugs on Myocardial Metabolism in Chronic Heart Failure

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Chinese Journal of Integrative Medicine 2024年第5期30卷 458-467页

作者： HU Yu-xuan QIU Sheng-lei SHANG Ju-ju WANG Zi lai Xiao-lei Beijing Hospital of Traditional Chinese Medicine Capital Medical UniversityBeijing 100010China

Although there have been significant advances in the treatment of heart failure in recent years,chronic heart failure remains a leading cause of cardiovascular disease-related *** studies have found that targeted cardiac metabolic remodeling has good potential for the treatment of heart ***,most of the drugs that increase cardiac energy are still in the theoretical or testing *** research has found that botanical drugs not only increase myocardial energy metabolism through multiple targets but also have the potential to restore the balance of myocardial substrate *** this review,we summarized the mechanisms by which botanical drugs(the active ingredients/formulas/Chinese patent medicines)improve substrate utilization and promote myocardial energy metabolism by activating AMP-activated protein kinase(AMPK),peroxisome proliferator-activated receptors(PPARs)and other related *** the same time,some potential protective effects of botanical drugs on myocardium,such as alleviating oxidative stress and dysbiosis signaling,caused by metabolic disorders,were briefly discussed.

关键词： botanical drugs chronic heart failure myocardial metabolism pharmacological effects review

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Comparative analysis shows high level of lineage sorting in genomic regions with low recombination in the extended Picea likiangensis species complex

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Plant Diversity 2024年第4期46卷 547-550页

作者： Hui Zhu Weixiao lei Qing lai Yongshuai Sun Dafu Ru State Key Laboratory of Grassland Agro-ecosystems College of EcologyLanzhou UniversityLanzhou 730000China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China Xi'an Center for Disease Control and Prevention Xi'an 710068China

Genome-scale data,while promising for illuminating phylogenetic relationships,frequently pose a conundrum by yielding conflicting topologies and highly variable gene tree distributions(Pease et al.,2016).This complexity likely arises from the reticulate evolution observed in many taxa,where genetic information exchange occurs through diverse biological processes.

关键词： sorting processes yielding

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Advanced Metering Infrastructure for Electric Vehicle Charging

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Smart Grid and Renewable Energy 2011年第4期2卷 312-323页

作者： Lun Ka Lam King Tim Ko Hoi Yan Tung Hoi Ching Tung Wah Ching Lee Kim Fung Tsang loi lei lai 不详

The widely adoption of Electric Vehicle (EV) has been identified as a major challenge for future development of smart grids. The ever increasing electric vehicle charging further increases the energy demand. This paper reports the development of an Advanced Metering Infrastructure (AMI) as an effective tool to reshape the load profile of EV charging by adopting appropriate demand side management strategy. This paper presents a total solution for EV charging service platform (EVAMI) based on power line and internet communication. It must be stressed that the development of Third Party Customer Service Platform in this investigation facilitates a single bill to be issued to EV owners. Hence, EV owners understand their energy usage and thus may perform energy saving activity efficiently. Experiment and evaluation of the proposed system show that the throughput achieved is about 5 Mbps at 10 ms end to end delay in Power line Communication. By introducing two dimensional dynamic pricing and charging schedule, the proposed EVAMI successfully reduces 36% peak consumption and increases the “off peak” consumption by 54%. Therefore the EVAMI does not only reduce the peak consumption but also relocates the energy demand effectively.

关键词： Electric Vehicle Charging Advanced Metering Infrastructure Power Line Communication Demand Response

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A WiMAX-ZigBee Energy Management System for Green Education

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Smart Grid and Renewable Energy 2011年第4期2卷 338-348页

作者： Hoi Yan Tung Kim Fung Tsang Ka Lum Lam Hoi Ching Tung Rong Jian Zheng King Tim Ko loi lei lai 不详

A WiMAX-ZigBee energy management system for green education has been developed. The system helps to resolve the disgusting environmental problems. This paper explores the concept of energy management and introduces an Energy Management System located at campus areas. Analysis shows that 30% energy can be saved from the total energy consumption which translates to a saving of 72 thousand million kWh of energy annually. Such saving reduces 48 million tons of CO2 emission for the environment.

关键词： Energy Management Minimizing CO2 Generation WiMAX ZigBee Green Education

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Efficient single‑pixel imaging based on a compact fiber laser array and untrained neural network

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Frontiers of Optoelectronics 2024年第1期17卷 85-93页

作者： Wenchang lai Guozhong lei Qi Meng Yan Wang Yanxing Ma Hao Liu Wenda Cui Kai Han College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China

This paper presents an efficient scheme for single-pixel imaging(SPI)utilizing a phase-controlled fiber laser array and an untrained deep neural *** fiber lasers are arranged in a compact hexagonal structure and coherently combined to generate illuminating light *** the utilization of high-speed electro-optic modulators in each individual fiber laser module,the randomly modulated fiber laser array enables rapid speckle projection onto the object of ***,the untrained deep neural network is incorporated into the image reconstructing process to enhance the quality of the reconstructed *** simulations and experiments,we validate the feasibility of the proposed method and successfully achieve high-quality SPI utilizing the coherent fiber laser array at a sampling ratio of 1.6%.Given its potential for high emitting power and rapid modulation,the SPI scheme based on the fiber laser array holds promise for broad applications in remote sensing and other applicable fields.

关键词： Single-pixel imaging Fiber laser array Deep learning Remote sensing

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Genome engineering of the human gut microbiome

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Journal of Genetics and Genomics 2024年第5期51卷 479-491页

作者： Linggang Zheng Juntao Shen Ruiyue Chen Yucan Hu Wei Zhao Elaine lai-Han Leung lei Dai Dr Neher's Biophysics Laboratory for Innovative Drug Discovery/State Key Laboratory of Quality Research in Chinese Medicine Macao University of Science and TechnologyTaipaMacao 999078China CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Cancer Center Faculty of Health ScienceUniversity of MacaoMacao 999078China MOE Frontiers Science Center for Precision Oncology University of MacaoMacao 999078China

The human gut microbiome,a complex ecosystem,significantly influences host health,impacting crucial aspects such as metabolism and *** enhance our comprehension and control of the molecular mechanisms orchestrating the intricate interplay between gut commensal bacteria and human health,the exploration of genome engineering for gut microbes is a promising ***,the complexities and diversities inherent in the gut microbiome pose substantial challenges to the development of effective genome engineering tools for human gut *** this comprehensive review,we provide an overview of the current progress and challenges in genome engineering of human gut commensal bacteria,whether executed in vitro or in situ.A specific focus is directed towards the advancements and prospects in cargo DNA delivery and high-throughput ***,we elucidate the immense potential of genome engineering methods to enhance our understanding of the human gut microbiome and engineer the microorganisms to enhance human health.

关键词： Non-model gut commensals Genomeediting reagents Cargo delivery High-throughput genome engineering

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