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Journal of Thermal Science 2020年第5期29卷 1206-1222页

作者： XU Tong YAN Jing WANG Xinlei WANG Hai ZHU Tong WANG Haiying beijing huajian power design and research institute Beijing 101400China School of Mechanical Enginecring Tongji UniversityShanghai 200092China

When regulating a pipe network according to user demand,hydraulic balance and power consumption are crucial factors for a multi-source looped-pipe network applying distributed variable-speed pumps compared to the conventional central circulating pump *** this paper,the influence of the fill point on power consumption and hydraulic balance of the multi-source looped-pipe network was studied.A mathematical model for electricity energy consumption analysis was built and calculated for a large sized looped-pipe network with multiple heat sources and distributed variable-speed *** hydraulic calculation models of each single element,such as pipe,distribution pump,valve,replenishment pump,heat source and substation,were built.A case located in Dezhou city,China was *** results showed that:the maximum power saving(39.2%)could be achieved when each heat source had its own fill point,but the heat sources would not meet their design flows;to meet the design flows of all the heat sources,only one fill point should be necessarily located near the heat source with the lowest flow rate to get the expected hydraulic stability and energy saving.

关键词： district heating central circulating pump distributed variable-speed pumps fill point energy saving

Recent Advances in Artificial Sensory Neurons:Biological Fundamentals,Devices,Applications,and Challenges

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Nano-Micro Letters 2025年第3期17卷 168-216页

作者： Shuai Zhong Lirou Su Mingkun Xu Desmond Loke Bin Yu Yishu Zhang Rong Zhao Guangdong institute of Intelligence Science and Technology HengqinZhuhai 519031People’s Republic of China College of Integrated Circuits Zhejiang UniversityHangzhou 3112000People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 310027People’s Republic of China Department of Science Mathematics and TechnologySingapore University of Technology and DesignSingapore 487372Singapore Department of Precision Instruments Tsinghua UniversityBeijing 100084People’s Republic of China Center for Brain‑Inspired Computing research Tsinghua UniversityBeijing 100084People’s Republic of China IDG/McGovern institute for Brain research Tsinghua UniversityBeijing 100084People’s Republic of China

Spike-based neural networks,which use spikes or action potentialsto represent information,have gained a lot of attention because of their high energyefficiency and low power *** fully leverage its advantages,convertingthe external analog signals to spikes is an essential *** including analog-to-digital converters or ring oscillators,and sensorssuffer from high power and area *** efforts are devoted to constructingartificial sensory neurons based on emerging devices inspired by the biologicalsensory *** can simultaneously perform sensing and spike conversion,overcoming the deficiencies of traditional sensory *** review summarizesand benchmarks the recent progress of artificial sensory *** starts with thepresentation of various mechanisms of biological signal transduction,followed bythe systematic introduction of the emerging devices employed for artificial ***,the implementations with different perceptual capabilitiesare briefly outlined and the key metrics and potential applications are also ***,we highlight the challenges and perspectives for the future development of artificial sensory neurons.

关键词： Artificial intelligence Emerging devices Artificial sensory neurons Spiking neural networks Neuromorphic sensing

Cross-Regional Analysis of New Energy Consumption Capacity

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Journal of beijing institute of Technology 2020年第1期29卷 38-44页

作者： Shiyi Ma Cong Duan Tong Xu Xinlei Wang Xueqin Tian Liang Wang beijing huajian power design and research institute Beijing 102209China School of Automation Beijing Institute of TechnologyBeijing 100081China

An assessment of the new energy consumption capacity of the grid can help to improve new energy efficiency and its planning and *** annual capacity of multi-regional new energy consumption is affected by the new energy installed capacity of each region,the output of thermal power units,the load size,and the exchange capacity between regional tie *** this paper,a real-time data processing method of a province is proposed,and a raw data processing method with dimensionality reduction equivalent is *** the perspective of new installed capacity of new energy across regions,we obtain the assessment of the capacity of wind power photovoltaic bases in a given scenario,and propose new installed capacity for wind,light and energy storage power stations.

关键词： new energy consumption new energy assessment mixed integer programming production simulation

Microstructure and Mechanical Properties of NANOBAIN Steel

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Journal of Iron and Steel research International 2016年第3期23卷 253-260页

作者： Yao HUANG Xue-li ZHANG Wei-ning LIU Xu-min WANG Jun-ke HAN China Electric power research institute Beijing 100192China beijing Electric power design institute Beijing 100055China AC Construction Branch State Grid Corporation of ChinaBeijing 100031China

The microstructure and mechanical properties of NANOBAIN steel treated at different isothermal temperatures were investigated by scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,uniaxial tensile tests and X-ray diffraction（XRD）.It was found that bainitic ferrite（BF）plate was made of basic shear transformation units arranged in the same direction of *** existence of defects,such as nanoscale twinning and dislocation,suggested that the growth of transformation units was controlled by the surrounding defect plane with dislocation,which was consistent with the moving direction of BF/austenite interface parallel to the twinning *** behavior of work hardening indicated that mechanical stability of microstructures obtained at 250 ℃ and 300 ℃ was much more stable than that obtained at 210℃.The evolution of carbon partitioning in retained austenite and bainitic ferrite also indicated that austenite was enriched in carbon at the initial stage step by step;after the formation of BF,the austenite did not seem to be greatly enriched in carbon and the carbon content showed a little decrease instead;subsequently,aphenomenon of little decarburization of supersaturated bainitic ferrite has also been found.

关键词： NANOBAIN steel shear transformation unit work hardening behavior carbon partitioning

Characteristics of the Lower Yellow River channel shrinkage and its discriminant parameters

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Science China(Technological Sciences) 2010年第5期53卷 1374-1386页

作者： HU ChunHong1 & ZHANG GuoGang2 1 China institute of Water Resources and Hydropower research,beijing 100038,China 2 Guangdong Electric power design institute,Guangzhou 510663,China China institute of Water Resources and Hydropower research Beijing China Guangdong Electric power design institute Guangzhou China

This paper analyzes the changing trends of the Lower Yellow River(LYR) transverse profile parameters and their aberrance points by the time series analysis *** results show that there has been a trend of changes in the LYR channel transverse profile parameters since the *** main river channel has a tendency of shrinkage year by year and the trend will be continued in the *** main features of the LYR channel shrinkage are remarkable reductions of bankfull dis-charges and bankfull areas,corresponding decreases of bankfull widths,average bankfull water depths and maximal bankfull water depths,as well as increases of bankfull water levels and width-depth ratios *** discriminant parameters for threshold of the LYR main channel shrinkage were put *** indicates that the LYR main channel began to shrink in the 1970s and has entered into a serious phase of channel shrinkage since the *** incompatible index of discharged water-sediment processes of the Sanmenxia Reservoir was introduced,which revealed that there was a trend of increasing in the incompatibility between water flow and sediment *** relations between the LYR main channel shrinkage parameters and discharged water-sediment processes of the Sanmenxia Reservoir were founded,which indicate that the LYR main channel shrinkage can be mitigated and improved through the regulation of discharged water-sediment processes of the reservoir,especially through the regulation of water-sediment incompatible *** LYR channel for water and sediment transportation can be restored and maintained.

关键词： Lower Yellow River time series analysis main river channel shrinkage discriminant parameters of channel shrinkage water-sediment incompatible index

Combustor design and performance prediction based on parametric model

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航空动力学报 2014年第4期29卷 748-754页

作者： LI Feng SHANG Shou-tang GUO Rui-qing CHENG Ming TANG Zheng-fu SONG Bo School of Energy and power Engineering Beijing University of Aeronautics and Astronautics Combustion design Office Shenyang Engine Design and Research InstituteAviation Industry Corporation of China

By combining the three-dimensional model software and grid generation software,the combustor parametric model and high quality and high speed gridding in the full flow field has been *** on the research of the parametric modeling,an optimizing design,CFD analysis and performance prediction of the combustor have been accomplished,and the rule of the combustor performance variation with structural parameters was *** results show that the combustor capability has no significant change with the radial swirler parameters and the primary holes *** combustor capability has significant change with position and profile of the primary holes and dilution holes,and the combustor outlet temperature profile and emission change greatly when the total hole area of the burnerinnerliner *** parametric model method is helpful to provide a fast design method for the aero-engine combustor design.

关键词：经验模型航空动力设计涡旋设计航空设计

Combustion efficiency test method in scramjet engine

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航空动力学报 2014年第12期29卷 2862-2867页

作者： GUO Rui-qing LI Feng WANG Yun-lei L Fu-guo SHANG Shou-tang TANG Zheng-fu School of Energy and power Engineering Beijing University of Aeronautics and Astronautics Combustion design Office Shenyang Engine Design and Research InstituteAviation Industry Corporation of China

A scramjet engine combustion efficiency measure system was *** combustion efficiency was measured by chromatography method,and the results of chromatography method were compared with those of temperature *** results indicate that the combustion efficiency measured by chromatography method was 80.7%,lower than the combustion efficiency of 84.5%measured by temperature method;the combustion efficiency could be measured more precisely by chromatogram method than by temperature *** combustion efficiency measure system based on chromatogram method can work well,and thus can be used to measure the combustion efficiency of scramjet engine.

关键词： supersonic combustion test combustion efficiency sampling analysis sampling probe

Effect of silicon on ductility of T91 steel in liquid lead-bismuth eutectic environment

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Journal of Iron and Steel research International 2023年第2期30卷 363-374页

作者： Ji Li Xi-kou He Gang Yang Bin Xu Zheng-xin Tang research institute of Special Steel Central Iron and Steel Research Institute Co.Ltd.Beijing100081China design institute Nuclear Power Institute of ChinaChengdu610014SichuanChina

The tensile tests of T91 and T91Si steels at 200-450℃in air and at 350℃in oxygen-depleted liquid lead-bismuth eutectic(LBE)environment with strain rate of 1×10^(-5)-5×10^(-3)were *** show that the activation energy of T91 steel is 103.45-246.76 kJ/mol and that of T91Si steel is 146.98-172.11 kJ/mol when Portevin-Le Chatelie(PLC)phenomenon *** elongation reduction of T91 steel at 350℃is not specific to LBE environment,whereas the presence of LBE promotes crack initiation and propagation and affects the elongation of the material in the necking *** Si addition,the elongation,especially the uniform elongation at 350℃in LBE environment,improves,and the tendency toward crack propagation in T91 steel after slow tensile necking is *** PLC phenomenon can be seen in both T91 and T91Si steels at high temperatures owing to the dynamic strain aging(DSA).The temperature ranges are different when DSA occurs,with 300-350℃and 250-350℃for T91 and T91Si steels,respectively.

关键词： Dynamic strain aging Liquid lead-bismuth eutectic Silicon content T91 steel Portevin-Le Chatelie

High Frequency Stability Constraints Based MMC Controller design Using NSGA-III Algorithm

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CSEE Journal of power and Energy Systems 2023年第2期9卷 623-633页

作者： Ke Ji Weiming Chen Xueguang Wu Hui Pang Jingxuan Hu Shan Liu Fan Cheng Guangfu Tang China Electric power research institute Beijing 100192China Chen is with State Grid Fujian Electric power research institute Fuzhou 350007China State Grid Smart Grid research institute Beijing 102211China

The occurrence of high frequency resonances(HFRs)has been frequently observed in several MMC-HVDC *** avoid these HFRs,the controller design of an MMC must satisfy two requirements:1)The controller should remain stable while in the high frequency range,and 2)MMC impedance should not possess a negative real part in the high frequency *** far,majority of the related studies on MMC controller design have been unable to address these requirements *** paper first describes the simplified high frequency MMC impedance model developed indigenously by the ***,the driving mechanism of two kinds of HFRs is revealed using the said developed model,including:1)MMC controller instability,and 2)Interaction instability between MMC and AC ***,the mathematical expressions outlining the controller stability constraint and positive damping constraint are ***,NSGA-III based multi-objective optimization algorithm is adopted,to identify the region most suitable for satisfying the proposed stability constraints under the MMC controller *** proposed controller design method is capable of effectively evading the HFRs triggered by the incompatible *** detailed time-domain simulations generated using PSCAD/EMTDC software validate the proposed designed method and endorse the improved results.

关键词： AC cable controller parameter optimization harmonic resonance MMC NSGA-III offshore wind power integration

Control Method for Additional Damper in Hydro-turbine Speed Governor of Hydro-dominant power Systems

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CSEE Journal of power and Energy Systems 2023年第2期9卷 589-598页

作者： Guanhong Wang Yong Tang Ying Li Dongping Ai Gang Chen Wei Wei Department of power System China Electric Power Research InstituteBeijing 100192China Department of power System Technology State Grid Sichuan Electric Power Research InstituteChengdu 610072China

With the rapid development of the national interconnected power grid,fast automatic excitation regulators and fast turbine governors are being widely *** the current systems,some power plants adjust their responses for turbine governor systems to a very sensitive level to meet the primary frequency regulation assessment index,which actively brings about negative *** these circumstances,the ultralow frequency oscillation(ULFO)phenomenon emerged in hydrodominant power *** order to solve the problem of ULFO,the hydro-turbine governor additional damper(GAD)based on phase compensation,which adapts to ULFO,is *** design of the control system is relatively *** a phase compensation based on the field testing and modeling of the turbine governor,GAD can provide the power system with positive damping,which contributes to the stability and security of the *** to the impact of the mechanism of the turbine governor on the dynamic stability of the power system and the research of modeling and parametric testing,the proposed method not only supports positive damping,but also eliminates the negative damping of the speed governing system,which can significantly suppress the ultralow frequency oscillation and make it feasible to configure the GAD parameters according to field testing.

关键词： Governor additional damper phase compensation power system ULFO