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CSEE Journal of Power and Energy Systems 2020年第3期6卷 619-629页

作者： jinghua li Mengshu Zhu Yujin Huang College of Electrical Engineering Guangxi UniversityGuangxi 530005China

Integrated energy systems(IES)are under development to accommodate the widespread penetration of renewable energy into power *** universal utilization of coupling components makes the connection between power grids and heat grids even *** paper applies energy flow calculations to planning problems and explores a method for selecting coupling components in the integrated electrical and heating *** process is based on the analysis of energy flow distribution and the comprehensive indexes,which include operation cost and the penalty cost of wind curtailment and solar energy ***,a selection method of coupling components installation locations based on energy flow calculations is *** last,an IES with 5 electrical buses and 5 heating nodes,and a 9-bus electrical power system with a 31-node heating transmission system are chosen to study the specific application problems in detail as well as to elucidate the effectiveness of the proposed *** turned out that the relevant coupling components and their positions can be selected according to the indexes obtained by integrated electrical-hydraulic-thermal *** proposed method is conducive to the planning of integrated energy systems.

关键词： Classification and location selection coupling components energy flow calculation integrated energy system renewable energy

Noble-metal free plasmonic nanomaterials for enhanced photocatalytic applications—A review

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Nano Research 2022年第12期15卷 10268-10291页

作者： jinghua li Yiming Zhang Yalong Huang Bing Luo li Jing Dengwei Jing International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an710049China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an710049China

Plasmonic nanomaterial catalysis is currently at the frontier of photocatalysis,overcoming the limitations of wide bandgap semiconductors for light *** localized surface plasmon resonance(LSPR)properties allow broad ultraviolet-visible-near infrared ray(UV-vis-NIR)absorption,making it an ideal material for solar energy *** plasmonic nanostructures rely on precious *** noble metal plasmonic nanomaterials have proven to be one of the strategies for enhancing photocatalytic activity,their expensive cost and limitations in light absorption range have hindered their practical *** a result,noble-metal free plasmonic nanomaterials have risen to the top of the research priority ***,this paper reviews the fundamental principles and classification of the LSPR effect of noble-metal free plasmonic nanomaterials in photocatalytic and their recent applications in hydrogen generation,carbon dioxide reduction,and pollutant *** cases elucidate the possible working mechanism of enhanced photocatalysis by noble-metal free plasmonic ***,the challenges and future opportunities for noble-metal free plasmonic nanomaterials in energy conversion and storage are discussed and envisioned.

关键词： localized surface plasmon resonance(LSPR) noble-metal free plasmonic nanomaterials photocatalysis

Passive Localization of Multiple Sources Using Joint RSS and AOA Measurements in Spectrum Sharing System

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China Communications 2021年第12期18卷 65-80页

作者： Kang li Yutao Jiao Yehui Song jinghua li Chao Yue College of Communication Engineering Army Engineering University of PLANanjing 210007China

In spectrum sharing systems,locating mul-tiple radiation sources can efficiently find out the in-truders,which protects the shared spectrum from ma-licious jamming or other unauthorized ***-pared to single-source localization,simultaneously lo-cating multiple sources is more challenging in prac-tice since the association between measurement pa-rameters and source nodes are not ***-over,the number of possible measurements-source as-sociations increases exponentially with the number of sensor *** is crucial to discriminate which measurements correspond to the same source before *** this work,we propose a central-ized localization scheme to estimate the positions of multiple ***,we develop two computa-tionally light methods to handle the unknown RSS-AOA measurements-source association *** method utilizes linear coordinate conversion to com-pute the minimum spatial Euclidean distance sum-mation of *** method exploits the long-short-term memory(LSTM)network to clas-sify the measurement ***,we propose a weighted least squares(WLS)approach to obtain the closed-form estimation of the positions by linearizing the non-convex localization *** re-sults demonstrate that the proposed scheme could gain sufficient localization accuracy under adversarial sce-narios where the sources are in close proximity and the measurement noise is strong.

关键词： multiple sources localization passive lo-calization received signal strength(RSS) angle of ar-rival(AOA) measurements-source association

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Topology tracking of dynamic UAV wireless networks

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Chinese Journal of Aeronautics 2022年第11期35卷 322-335页

作者： Yehui SONG Guoru DING Jiachen SUN jinghua li Yitao XU College of Communications Engineering Army Engineering University of PLANanjing 210007China

Wireless network is the communication foundation that supports the intelligentization of Unmanned Aerial Vehicle(UAV) swarm. The topology of UAV communication network is the key to understanding and analyzing the behavior of UAV swarm, thus supporting the further prediction of UAV operations. However, the UAV swarm network topology varies over time due to the high mobility and diversified mission requirements of UAVs. Therefore, it is important but challenging to research dynamic topology inference for tracking the topology changes of the UAV network,especially in non-cooperative manner. In this paper, we study the problem of inferring UAV swarm network topology based on external observations, and propose a dynamic topology inference method. First, we establish a sensing framework for acquiring the communication behavior of the target network over time. Then, we expand the multi-dimensional dynamic Hawkes process to model the communication event sequence in a dynamic wireless network. Finally, combining the sliding time window mechanism, the maximum weighted likelihood estimation is applied to inferring the network topology. Extensive simulation results demonstrate the effectiveness of the proposed method.

关键词： Dynamic topology inference Event detection Hawkes process UAV swarm Wireless networks

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Surface-functionalized design of blood-contacting biomaterials for preventing coagulation and promoting hemostasis

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Friction 2023年第8期11卷 1371-1394页

作者： Yi WANG Weijie ZHAI Shujie CHENG jinghua li Hongyu ZHANG State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Basic Research Key Laboratory of General Surgery for Digital Medicine Affiliated Hospital of Hebei UniversityBaoding 071000China Beijing Key Laboratory of Advanced Manufacturing Technology Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

The anticoagulation and hemostatic properties of blood-contacting materials are opposite lines of research, but their realization mechanisms are inspired by each other. Contact between blood and implantable biomaterials is a classic problem in tribological research, as both antithrombotic and hemostatic materials are closely associated with this problem. Thrombus formation on the surfaces of blood-contacting biomedical devices can detrimentally affect their performance and patient life, so specific surface functionalization is required. Currently, intensive research has focused on the development of super-lubricated or super-hydrophobic coatings, as well as coatings that deliver antithrombotic drugs. In addition, hemostatic biomaterials with porous structures, biochemical substances, and strongly adhesive hydrogels can be used to achieve rapid and effective hemostasis via physical or biochemical mechanisms. This article reviews methods of preparing anticoagulant coatings on material surfaces and the current status of rapid hemostatic materials. It also summarizes fundamental concepts for the design and synthesis of anticoagulant and hemostatic materials by discussing thrombosis and hemostasis mechanisms in biomedical devices and normal organisms. Because there are relatively few reports reviewing the progress in surface-functionalized design for anticoagulation and hemostasis, it is anticipated that this review can provide a useful summary of the applications of both bio-adhesion and bio-lubrication techniques in the field of biomedical engineering.

关键词： anticoagulation hemostasis lubrication hydrogel fibrous membrane

Minimum energy storage for power system with high wind power penetration using p-efficient point theory

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Science China(Information Sciences) 2014年第12期57卷 243-254页

作者： li jinghua WEN JinYu CHENG ShiJie WEI Hua State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology School of Electrical Engineering Guangxi University

Minimum energy storage(ES)and spinning reserve(SR)for day-ahead power system scheduling with high wind power penetration is significant for system operations.A chance-constrained energy storage optimization model based on unit commitment and considering the stochastic nature of both the wind power and load demand is *** solve this proposed chance-constrained model,it is first converted into a deterministic-constrained model using p-efficient point theory.A single stochastic net load variable is developed to represent the stochastic characteristics of both the wind power and load demand for convenient use with the p-efficient point theory.A probability distribution function for netload forecast error is obtained via the Kernel estimation *** proposed model is applied to a wind-thermal-storage combined power system.A set of extreme scenarios is chosen to validate the effectiveness of the proposed model and *** results indicate that the scheduled energy storage can effectively compensate for the net load forecast error,and the increasing wind power penetration does not necessarily require a linear increase in energy storage.

关键词： energy storage spinning reserve wind power penetration chance constraints p-efficient theory kernel estimation

Research on Welding Quality Traceability Model of Offshore Platform Block Construction Process

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Computer Modeling in Engineering & Sciences 2023年第1期134卷 699-730页

作者： jinghua li Wenhao Yin Boxin Yang Qinghua Zhou College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin150001China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China

Quality traceability plays an essential role in assembling and welding offshore platform *** improvement of the welding quality traceability system is conducive to improving the durability of the offshore platform and the process level of the offshore ***,qualitymanagement remains in the era of primary information,and there is a lack of effective tracking and recording of welding quality *** welding defects are encountered,it is difficult to rapidly and accurately determine the root cause of the problem from various complexities and scattered quality *** this paper,a composite welding quality traceability model for offshore platform block construction process is proposed,it contains the quality early-warning method based on long short-term memory and quality data backtracking query optimization *** fulfilling the training of the early-warning model and the implementation of the query optimization algorithm,the quality traceability model has the ability to assist enterprises in realizing the rapid identification and positioning of quality ***,the model and the quality traceability algorithm are checked by cases in actual working *** analyses suggest that the proposed early-warningmodel for welding quality and the algorithmfor optimizing backtracking requests are effective and can be applied to the actual construction process.

关键词： Quality traceability model block construction process welding quality management long short-term memory quality data backtracking query optimization algorithm

Optimization of Multi-Execution Modes and Multi-Resource-Constrained Offshore Equipment Project Scheduling Based on a Hybrid Genetic Algorithm

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Computer Modeling in Engineering & Sciences 2023年第2期134卷 1263-1281页

作者： Qi Zhou jinghua li Ruipu Dong Qinghua Zhou Boxin Yang College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China ShanghaiWaigaoqiao Shipbuilding Co. Ltd.Shanghai200000China College of Mechanical and Electrical Engineering Harbin Engineering UniversityHarbin150001China

Offshore engineering construction projects are large and complex,having the characteristics of multiple execution modes andmultiple resource *** complex internal scheduling processes can be regarded as resourceconstrained project scheduling problems(RCPSPs).To solve RCPSP problems in offshore engineering construction more rapidly,a hybrid genetic algorithmwas *** solve the defects of genetic algorithms,which easily fall into the local optimal solution,a local search operation was added to a genetic algorithm to defend the offspring after crossover/***,an elitist strategy and adaptive operators were adopted to protect the generated optimal solutions,reduce the computation time and avoid premature convergence.A calibrated function method was used to cater to the roulette rules,and appropriate rules for encoding,decoding and crossover/mutation were ***,a simple network was designed and validated using the case study of a real offshore *** performance of the genetic algorithmand a simulated annealing algorithmwas compared to validate the feasibility and effectiveness of the approach.

关键词： Offshore project multi-execution modes resource-constrained project scheduling hybrid genetic algorithm

A coordinated dispatch method with pumped-storage and battery-storage for compensating the variation of wind power

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Protection and Control of Modern Power Systems 2018年第1期3卷 21-34页

作者： jinghua li Sai Wang liu Ye Jiakun Fang Guangxi University NanningGuangXiChina

Growing penetration of wind power challenges to power system security,since the conventional generators may not have sufficient capacity to compensate wind power fluctuation plus the reverse peak *** this paper,the high-capacity pumped-storage and fast-response battery-storage are coordinated to compensate the variation of both wind power and load,aiming at shifting peak load,responding to wind power ramping,reducing the curtailment of wind and stabilizing the output of thermal units.A practical framework is designed for optimizing the operation of the hybrid system consisting of the wind,pumped-storage,and battery storage,which can take full advantages of pumped-storage and *** detailed mathematical formulations of the pumpedstorage and battery-storage are *** cases are studied to demonstrate the advantages of the proposed coordination method.

关键词： Pumped-storage Battery-storage Hybrid energy system Economic dispatch Renewable energy

An investigation of the persistence property of wind power time series

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Science China(Technological Sciences) 2014年第8期57卷 1578-1587页

作者： SUN HaiShun li JiaMing li jinghua Wu Tong WEN JinYu XIE Hailian YUE ChengYan China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologySchool of Electrical and Electronic Engineering ABB (China) Ltd. Corporate Research Center

Mining the inherent persistence property of the time series of wind power is crucial for forecasting and controlling wind *** common methods exist that can fully depict and quantify the persistence *** on the definition of the active power output state of a wind farm,this paper describes the statistical persistence property of the duration time and state *** on the results of our analysis of significant amounts of wind power field measurements,it is found that the duration time of wind power conforms to an inverse Gaussian ***,the state transition matrix of wind power is discovered to yield a ridge property,the gradient of which is related to the time scale of interest.A systemaic methodology is proposed accordingly,allowing the statistical characteristics of the wind power series to be represented appropriately.

关键词： characteristics analysis persistence property duration time state transition wind power series

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