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High Technology Letters 2024年第1期30卷 85-98页

作者：陶永 XUE Jiao wei Hongxing liu Haitao GAO He WANG Tianmiao school of Mechanical engineering&{2. Beihang UniversityBeijing 100191P.R.China research Institute of Aero Engine Beihang UniversityBeijing 100191P.R.China

With the rapid development of the aviation industry,the development of intelligent manufacturing equipment represented by composite robots has been paid close attention by the aviation *** on the analysis of the background and main structure function of composite robots,this paper focuses on the analysis of key technologies such as composite robot hardware design,visual sensing and planning system,integrated control of‘hands,feet,and eyes',multi-robot collaborative operation,and *** typical applications of composite robots in aviation intelligent manufacturing such as automatic drilling and connection of aircraft,aircraft surface spraying and finishing,parts handling,aircraft measurement,and inspection are *** development trends such as standardization of composite robots,integration of‘5G+cloud computing+AI',and fusion of intelligent sensors are proposed.

关键词： aviation manufacturing composite robot key technology development trend safety

Impacts of thermal and electric contact resistance on the material design in segmented thermoelectric generators

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Energy Storage and Saving 2024年第1期3卷 5-15页

作者： Junwei Zhao Zhengfei Kuang rui Long Zhichun liu wei liu school of Energy and power engineering Huazhong University of Science and TechnologyWuhan430074China Wuhan Second Ship Design and research Institute Wuhan430074China

Segmented thermoelectric generators(STEGs)can exhibit present superior performance than those of the conventional thermoelectric *** and electrical contact resistances exist between the thermoelectric material interfaces in each thermoelectric *** may significantly hinder performance *** this study,a five-layer STEG with three pairs of thermoelectric(TE)materials was investigated considering the thermal and electrical contact resistances on the material contact *** STEG performance under different contact resistances with various combinations of TE materials were *** relationship between the material sequence and performance indicators under different contact resistances is established by machine *** on the genetic algorithm,for each contact resistance combination,the optimal material sequences were identified by maximizing the electric power and energy conversion *** reveal the underlying mechanism that determines the heat-to-electrical performance,the total electrical resistance,output voltage,ZT value,and temperature distribution under each optimized scenario were *** STEG can augment the heat-to-electricity performance only at small contact resistances.A large contact resistance significantly reduces the *** an electrical contact resistance of rE=10^(-3) K⋅m^(2.⋅W^(-1) and thermal contact resistance of rT=10-8Ω⋅m^(2.,the maximum electric power was reduced to 5.71 mW(90.86 mW without considering the contact resistance).And the maximum energy conversion efficiency is lowered to 2.54%(12.59%without considering the contact resistance).

关键词： Segmented thermoelectric generator Contact resistance Material design Machine learning

research on Modeling and Simulation of permanent Magnet Linear Synchronous Motor for Vertical Transportation System

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Research on Modeling and Simulation of Permanent Magnet Line...

A gel polymer electrolyte based on IL@NH_(2.-MIL-53(Al)for high-performance all-solid-state lithium metal batteries

2.09中国控制与决策会议

作者： Wang Xin-huan,Zhang Hong-wei,Kang run-sheng school of {2. engineering & automation henan polytechnic university,henan jiaozuo 454000

＜正＞The vertical transportation system driven by permanent Magnet Linear Synchronous Motor（pMLSM） has the characters of simple structure,high speed and rope less *** suit to super high buildings and deep mine lift. Based on the mathematical model of pMLSM,the paper designs the fuzzy pID controller and the program for electromagnet parameters and established the model of pMLSM lifting *** reasonability and validity have been testified by the simulation *** is important to the designing and debugging for the real control system.

关键词： permanent Magnet Linear Synchronous Motor pMLSM MATLAB Modeling and simulation Fuzzy pID control

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Chinese Journal of Chemical engineering 2024年第5期69卷 47-55页

作者： Sijia Wang Ye liu Liang He Yu Sun Qing Huang Shoudong Xu Xiangyun Qiu Tao wei school of Energy and power Jiangsu University of Science and TechnologyZhenjiang 212003China College of Materials Science and engineering Nanjing Forestry UniversityNanjing 210037China College of Chemical engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China power&Energy Storage System research Center College of Mechanical and Electrical EngineeringQingdao UniversityQingdao 266071China

Solid polymer composite electrolytes possess the benefits of superior compatibility with electrodes and good thermal characteristics for more secure energy storage ***,a new gel polymer electrolyte(GpE)containing NH_(2.-MIL-53(Al),[pp_(13)][TFSI],LiTFSI,and pVDF-HFp was prepared using a simple method of solution *** effects of encapsulating different ratios of ionic liquid([pp_(13)][TFSI])into the micropores of functionalized metal-organic frameworks(NH_(2.-MIL-53(Al))on the electrochemical properties were ***,SEM,nitrogen adsorption-desorption isotherms,and electrochemical measurements were *** GpE demonstrates a superior ionic conductivity of 8.08×10^(-4)S·cm^(-1)at 60℃and can sustain a discharge specific capacity of 156.6 mA·h·g^(-1)at 0.2.C for over 100 *** work might offer a potential approach to alleviate the solid-solid contact with the solid-state electrolyte and electrodes and broaden a new window for the creation of all-solid-state batteries.

关键词： Metal-organic frameworks(MOFs) All solid-state lithium batteries(ASSLBs) Ionic liquid NH_(2.-MIL-53(Al) Solid-state electrolytes(SSEs)

Distribution Line Longitudinal protectionMethod Based on Virtual Measurement Current restraint

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Energy engineering 2024年第2期121卷 315-337页

作者： weiWang Yang Yu Simin Luo Wenlin liu wei Tang Yuanbo Ye power Dispatching Control Center State Grid Anhui Electric Power Co.Ltd.Hefei230022China school of electrical {2. Beijing Jiaotong UniversityBeijing100044China

As an effective approach to achieve the“dual-carbon”goal,the grid-connected capacity of renewable energy increases *** are the most widely used renewable energy sources and have been applied on various ***,the inherent randomness,intermittency,and weak support of grid-connected equipment not only cause changes in the original flow characteristics of the grid but also result in complex fault *** overcurrent and differential protection methods cannot respond accurately due to the effects of unknown renewable energy ***,a longitudinal protection method based on virtual measurement of current restraint is proposed in this *** positive sequence current data and the network parameters are used to calculate the virtual measurement current which compensates for the output current of photovoltaic(pV).The waveform difference between the virtual measured current and the terminal current for internal and external faults is used to construct the protection *** improved edit distance algorithm is proposed to measure the similarity between virtual measurement current and terminal measurement ***,the feasibility of the protection method is verified through pSCAD simulation.

关键词： photovoltaic interconnection distribution network longitudinal protection method edit distance algorithm

Exploring the Mechanism,Advancements,and Application of Thermogalvanic Effect in Hydrogels

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Chinese Journal of Chemistry 2024年第5期42卷 543-556页

作者： Xiaoyu Yang peng Wang Xiaolong Wu Yongli Liao Senyun liu wei Duan Ying Yue school of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingHebei071000 China Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure prevention North China Electric Power UniversityBaodingHebei071003 China Electric power research Institute China South Power GridGuangzhouGuangdong510000 China Key Laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development CenterMianyangSichuan621000 China

The issue of energy consumption has garnered significant interest due to its excessive ***,thermoelectric devices have been getting increased attention,as they can harness waste heat from various sources,such as solar radiation,human body,and industrial ***,the recovery of low-grade heat has been a challenge,resulting in unsustainable energy use and significant *** considerable advances have been made in thermoelectric materials in recent decades,the majority of these devices still primarily employ ***,the emergence of quasi-solid-state thermoelectric materials represents a novel development with profound promise for the environment and *** materials offer several advantages,such as improved energy conversion capacities,cost-effectiveness,versatility,and scalability,to support increased ***,this review explores the application of thermoelectric materials in self-powered sensors,integrated modules,and heat harvesting ***,the potential of high-performance thermocouples based on thermogalvanic effects is assessed,along with the challenges that must be overcome to realize this goal.

关键词： Hydrogel Thermogalvanic effect Thermochemistry Electrolytes Flexible electronics

Unveiling non-radiative center control in CspbBr_(3) nanocrystals:A comprehensive comparative analysis of hot injection and ligandassisted reprecipitation approaches

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Nano research 2024年第5期17卷 4525-4534页

作者： Daocheng Hong Yuchen Zhang Shuhan pan Hanyu liu wei Mao Wanli Zhang Yuhui Ye Zhihong wei Xuxing Lu Xiaoyong Wang Zhenda Lu Yuxi Tian Key Laboratory for Advanced Technology in Environmental protection of Jiangsu province Yancheng Institute of TechnologyYancheng 224051China Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China College of engineering and Applied Sciences Nanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China school of Electronic Electrical Engineering and PhysicsFujian University of TechnologyFuzhou 350118China

Metal-halide perovskite nanocrystals(NCs)have gained significant attention in the field of optoelectronic and photonic devices due to their promising *** their exceptional optical properties,the impact of different synthetic strategies on the fundamental nature of NCs,such as nonradiative recombination centers,remains poorly *** this study,we investigated the photophysical properties of CspbBr_(3) NCs synthesized using two distinct methods,hot injection and ligand-assisted reprecipitation,at the individual particle *** observed different blinking behaviors under specific photoexcitation power densities and proposed,through intensity-lifetime analysis and Monte-Carlo simulations,that these different synthetic strategies can fabricate NCs with similar crystal structures but distinct surface quenchers with varying energy levels,which significantly affected the photo-induced blinking-down and blinking-up behaviors in individual *** findings indicate a practical and feasible approach for controlling defect engineering in perovskite NCs,with significant implications for their use in optoelectronic and other technological applications.

关键词： metal-halide perovskite nanocrystals photophysical properties nonradiative recombination centers hot injection method ligand-assisted reprecipitation

The Variational Lyapunov Method and Stability for Impulsive Delay Differential Systems

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Journal of Mathematical research and Exposition 2010年第1期30卷 67-77页

作者： Kai En liu1,2. Guo wei YANG3 1. {2. of Mathematics, Qingdao university, Shandong 2.6071, p. r. china 2. Center for Systems and Control, College of engineering, peking university, Beijing 100871, p. r. china 3. {2. of automation engineering, Qingdao university, Shandong 2.6071, p. r. china school of Mathematics Qingdao University Shandong P.R.China 266071 school of automation {2. Qingdao University Shandong P.R.China 266071

By using the variational Lyapunov method and razumikhin technique, the stability criteria in terms of two measures for impulsive delay differential systems are established. The known results are generalized and improv... 详细信息

关键词： impulsive delay differential system stability variational Lyapunov method razumikhin technique two measures.

Stability for uncertain neutral systems with time-varying delay

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Stability for uncertain neutral systems with time-varying de...