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Advancements in compressed air engine technology and power system integration: A comprehensive review

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Energy Reviews 2023年第4期2卷 49-62页

作者： Haifei Tian hualiang zhang Zhao Yin Yu Liu Xinjing zhang Yujie Xu Haisheng Chen Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China Nanjing Institute of Future Energy System Institute of Engineering ThermophysicsChinese Academy of SciencesNanjing211135China University of Chinese Academy of Sciences Beijing100049China

The compressed air power system demonstrates the ability to convert the internal energy stored within com-pressed air into mechanical energy,thus facilitating power *** application within specific domains,such as special purpose vehicles,standby power sources,and fire and explosion prevention,holds significant research and practical value owing to its combustion-free operation,zero pollution and *** paper aims to explain the operational principles and unique features of the compressed air engine(CAE).The reasons for selecting volume-type expanders as CAE components are detailed,including an analysis of their technical characteristics and research *** on this foundation,the paper explores the operational characteristics and research status of traditional compressed air power systems installed in vehicles,with a particular focus on their limited range and excessive cold ***,the study presents a comprehensive summary of the research progress made in the last few years relating to hybrid power systems that derive from conventional compressed air power ***,the paper concludes by outlining the expected development trajectory of CAEs and compressed air power systems.

关键词： Compressed air Engine Hybrid Power system Vehicle

Current Status and Prospects of High-Speed Direct-Drive Power Generation Technology

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Journal of Thermal Science 2024年第6期33卷 2097-2116页

作者： JIANG Chenglong YIN Zhao zhang hualiang ZHOU Peijian LIU Yu CHENG Kun XU Yujie CHEN Haisheng College of Metrology Measurement and Instrument China Jiliang UniversityHangzhou 310018China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China Nanjing Institute of Future Energy System Nanjing 211135China University of Chinese Academy of Sciences Beijing 100049China University of Chinese Academy of Sciences Nanjing 211135China

Turbine generators play a pivotal role in efficiently converting gas internal energy into electrical energy,finding extensive applications in diverse green energy and power *** adoption of a high-speed direct-drive structure eliminates mechanical losses associated with the reducer between the turbine and generator,enhancing system efficiency and ***,this configuration introduces challenges in design and *** article explores the various application scenarios of high-speed direct-drive power generation systems,examining their roles in organic Rankine cycle power generation,gas turbine power generation,supercritical CO_(2) power generation,vehicle exhaust turbine power generation,and natural gas pressure reduction power *** the high-speed,high-pressure,high-temperature,and high-efficiency challenges in turbine power generation systems,the key technologies are reviewed including high-speed bearings,rotor dynamics,high-speed motors,high-frequency variable frequency technology,sealing technology,axial force adjustment,thermal management,turbine aerodynamic design,and system control *** article further delves into the current research and development status of high-speed direct-drive power generation systems across different application ***,the article presents prospects for the future development of efficient,reliable and widely adaptable high-speed direct-drive generators,offering valuable insights for researchers and practitioners in the field.

关键词： turbine high speed generator structural design high speed bearings axial force adjustment

Motion direction prediction through spike timing based on micro Capsnet networks

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Science China(Technological Sciences) 2022年第11期65卷 2763-2775页

作者： zhang hualiang LIU Ji WANG BaoZeng DAI Jun LIAN JinLing KE Ang ZHAO YuWei ZHOU Jin WANG ChangYong Bejing Institute of Basic Medical Sciences Bejing 100850China School of Artificial Intlligence and Automation Huazhong University of Science and TechnologyWuhan 430074China

Neural activity extraction and neural decoding from neural signals are an important part of critical components of brain-computer interface *** the development of brain-computer interface technology,the demand for precise external control and nervous activities in macaque monkey during unilateral hand grasp has increased the complexity of control and neural decoding,which puts forward higher requirements for the accuracy and stability of feature extraction and neural *** this study,a micro Capsnet network architecture that consists of a few network layers,a vector feature structure,and optimization network parameters,is proposed to decrease the computing time and complexity,decrease artificial debugging,and improve the decoding *** with KNN,SVM,XGBOOST,CNN,Simple RNN,and LSTM,the algorithm in this study improves the decoding accuracy by 98.03%,and achieves state-of-the-art accuracy and stronger ***,the proposed algorithm can further enhance the control accuracy in the brain-computer interface.

关键词： spike timing micro Capsnet network brain-computer interface motion direction prediction optimized network parameter

Nano high-entropy oxide cathode with enhanced stability for direct borohydride fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 309-316页

作者： Lei zhang Lingfeng Kuang Lianke zhang Wen Chu Haiying Qin Jing zhang Junjing He hualiang Ni Hongzhong Chi New Energy Materials Research Center College of Materials and Environmental Engineering Hangzhou Dianzi University School of Materials Science and Engineering Zhejiang University Key Laboratory of MEMS of Ministry of Education School of Integrated Circuits Southeast University

High-entropy materials have become high-activity electrocatalysis owing to their high-entropy effect and multiple active ***,we synthesize a series of carbon-supported nano high-entropy oxides（HEOs/C）,specifically （PtFeCoNiCu）O/C,using a carbothermal shock （CTS） method for application as a cathode catalyst in direct borohydride fuel cells （DBFCs）.The microstructure of the prepared catalysts was characterized by X-ray photoelectron spectroscopy,X-ray absorption fine structure,and transmission electron *** prepared （PtFeCoNiCu）O/C,with particle sizes ranging from 2 to 4 nm,demonstrates 3.94 transferred electrons towards the oxygen reduction reaction in an alkaline environment,resulting in a minimal H2O2yield of 2.6%.Additionally,it exhibits a Tafel slope of 61 mV dec-1,surpassing that of commercial Pt/C (82 mV dec-1).Furthermore,after 40,000 cycles of cyclic voltammetry（CV） testing,the half-wave potential of （PtFeCoNiCu）O/C shows a positive shift of 3 mV,with no notable decline in the limiting current *** （PtFeCoNiCu）O/C is used as a cathode catalyst in DBFCs,the DBFC achieves a maximum power density of 441 mW cm-2at 60°C and sustains a cell voltage of approximately 0.73 V after 52 h at 30°*** findings confirm that HEO/C is a promising cathode catalyst for DBFCs.

关键词： Direct borohydride fuel cells (DBFC)

A W-Band Waveguide Band-Stop Filter Using Electromagnetic Crystal (EMXT) Surface

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Circuits and Systems 2016年第12期7卷 4001-4008页

作者： Te-Chuan Chen hualiang zhang Hao Xin Department of Electrical and Computer Engineering University of Arizona Tucson AZ USA

A rectangular waveguide band-stop filter using electromagnetic crystals (EMXT) surface as the top and bottom walls is presented in this letter. The EMXT surface has a band gap that can prevent electromagnetic wave from propagating along the waveguide. Dispersion properties of the waveguide filter are analyzed using an approximated lumped-element circuit model. A W-band prototype based on the proposed waveguide filter is designed and characterized. The experimental results show a rejection band centered at 97 GHz and a rejection level of 16 dB.

关键词： W-Band Band-Stop Filter Electromagnetic Crystal Band-Gap Waveguide

Holographic fabrication of octagon graded photonic supercrystal and potential applications in topological photonics

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Frontiers of Optoelectronics 2020年第1期13卷 12-17页

作者： Oliver SALE Safaa HASSAN Noah HURLEY Khadijah ALNASSER Usha PHILIPOSE hualiang zhang Yuankun LIN Department of Physics University of North TexasDentonTX 76203USA ECE Department University of Massachusetts LowellLowellMA 01854USA Department of Electrical Engineering University of North TexasDentonTX 76203USA

Novel optical properties in graded photonic super-crystals can be further explored if new types of graded photonic super-crystals are *** this paper,we report holographic fabrication of graded photonic super-crystal with eight graded lattice clusters surrounding the central non-gradient lattices through pixel-by-pixel phase engineering in a spatial light *** prospect of applications of octagon graded photonic super-crystal in topological photonics is discussed through photonic band gap engineering and coupled ring resonators.

关键词： 2D photonic crystal graded photonic supercrystal holographic fabrication photonic band structure

Wide field-of-view metalens: a tutorial

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Advanced Photonics 2023年第3期5卷 1-21页

作者： Fan Yang Mikhail YShalaginov Hung-I Lin Sensong An Anu Agarwal hualiang zhang Clara Rivero-Baleine Tian Gu Juejun Hu Massachusetts Institute of Technology Department of Materials Science and EngineeringCambridgeMassachusettsUnited States University of Massachusetts Lowell Department of Electrical and Computer EngineeringLowellMassachusettsUnited States Lockheed Martin Corporation OrlandoFloridaUnited States Massachusetts Institute of Technology Materials Research LaboratoryCambridgeMassachusettsUnited States

Wide field-of-view(FOV)optics are essential components in many optical systems,with applications spanning imaging,display,sensing,and beam *** refractive wide FOV optics often involve multiple stacked lenses,resulting in large size and weight as well as high *** lenses or metalenses promise a viable solution to realizing wide FOV optics without complex lens *** review the various architectures of wide FOV metalenses,elucidate their fundamental operating principles and design trade-offs,and quantitatively evaluate and contrast their imaging *** applications enabled by wide FOV metasurface optics are also discussed.

关键词： metasurface lens imaging field of view aberration

Research on Predictive Control Method of Permanent Magnet Synchronous Motor Based on Using Ultra-local Model

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Research on Predictive Control Method of Permanent Magnet Sy...

第43届中国控制会议

作者： Yiqiang zhang Tao zhang Yong Li hualiang zhang Guopeng zhang Hao Wang School of Electrical Engineering Shenyang University of Technology Shenyang Institute of Automation Chinese Academy of Sciences Key Laboratory of Networked Control Systems Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences

The traditional finite set model predictive control has the advantages of fast response and strong robustness. The threevector model predictive current control(TV-MPCC) improves the problem of large current ripple based on single-vector model predictive current control(MPCC) and can realize deadbeat current control. Still, it cannot avoid the influence of parameter disturbance. To solve this problem, this paper constructs an ultra-local model based on the input and output information of the motor and designs an adaptive sliding mode observer to estimate the unknown part of the model. Finally, the designed threevector model-free predictive current control with adaptive sliding mode observer(TV-MFPCC-ASMO) is simulated and compared with the traditional three-vector model predictive control. It has been proved that the proposed method can effectively suppress the system disturbance when the motor parameters are mismatched and improve the motor's steady-state and dynamic performance during operation.

关键词： Permanent magnet synchronous motor Three-vector model predictive control Ultra-local model Adaptive sliding mode observer

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身份认同视角下区域成人高校教师发展研究

职教论坛 2020年第7期36卷 123-129页

作者：张华亮上海市长宁区业余大学(长宁区社区学院) 上海开放大学航空运输学院社区教育指导中心

随着学习型社会建设的推进和终身学习时代的到来,区域成人高校教育功能的转型已经成为日益普遍的现象。在社会发展和学校转型的共同推动下,参与社区教育工作成为对教师个体的职责与能力的新要求,也影响着教师职业的发展。从社会结构功... 详细信息

随着学习型社会建设的推进和终身学习时代的到来,区域成人高校教育功能的转型已经成为日益普遍的现象。在社会发展和学校转型的共同推动下,参与社区教育工作成为对教师个体的职责与能力的新要求,也影响着教师职业的发展。从社会结构功能论的视角进行审视,教师个体身份认同的变化是在社会性力量的推动和个体主体性力量发挥的双重作用下不断重塑和生成的。了解这一过程及其特征,可以为教育机构决策和教师个人发展提供很好的借鉴。为此,试图通过个案分析,以身份认同的视角对转型发展中区域成人高校教师专业发展的新变化和新机遇进行深入探索与反思。

关键词：区域成人高校身份认同教师发展转型