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Brown and beige fat： the metabolic function, induction, and therapeutic potential

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Frontiers of Medicine 2015年第2期9卷 162-172页

作者： Shuwen Qian haiyan Huang Qiqun tang Key Laboratory of Metabolism and Molecular Medicine the Ministry of Education Department of Biochemistry and Molecular Biology Fudan University Shanghai Medical College Shanghai 200032 China

Adipose tissue is an important organ for energy homeostasis. White adipose tissue stores energy in the form of triglycerides, whereas brown adipocytes and recently identified beige adipocytes are specialized in dissipating energy by thermogenesis or contribution to dispose glucose and clear triglycerides in blood. The inverse correlation between the brown adipose tissue activity and body mass suggests its protective role against body fat accumulation. Thus, recruitment and activation of brown or beige adipose tissue become particularly appealing targets for increasing energy expenditure. Angiogenesis and sympathetic nerve signals are the fundamental determinants for brown and beige adipose tissue development, as well as for their metabolic functions. Secretary factors including BMPs can induce the development, the activation of brown or beige adipose tissue, which seem to be promising for therapeutic development.

关键词： brown adipocyte beige adipocyte metabolism obesity

Thermal Behavior Investigation of LiNi1/3CO1/3Mn1/3O2-Based Li-ion Battery under Overcharged Test

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Chinese Journal of Chemistry 2011年第1期29卷 27-32页

作者： Wang, haiyan tang, Aidong Huang, Kelong School of Chemistry and Chemical Engineering Central South University Changsha Hunan 410083 China

Thermal behavior of its components such as separator, electrolyte, cathode, anode, and each binder were inves- tigated by differential scanning calorimetry and thermal gravimetric （DSC/TG） to explain thermal runaway mechanism of Li-ion battery under overcharged test. DSC results indicated the decomposition reaction temperature of SEI （solid electrolyte interface） layer in anode was at about 126℃. It was found that heat generation in anode under normal charged state increased obviously with the increasing of charged voltage. When the battery was overcharged to 4.6 V or 5.0 V, the onset temperature and heat generation of thermal reaction in anode changed a little, while those in cathode had large increase. It was proposed that thermal behavior in cathode mainly caused by the reaction of electrolyte with evolutional oxygen played a key role to thermal runaway for the studied Li-ion battery under overcharged test.

关键词： lithium-ion battery LiNi1/3CO1/3Mn1/3O2 thermochemistry calorimetry overcharge

Coordinated Damping Optimization Control of Sub-synchronous Oscillation for DFIG and SVG

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CSEE Journal of Power and Energy Systems 2021年第1期7卷 140-149页

作者： Xinshou Tian Yongning Chi Yan Li haiyan tang Chao Liu Yuanyuan Su State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems(China Electric Power Research Institute) Beijing 100192China

Currently, the power electronics-based devices, includinglarge-scale non-synchronized generators and reactivepower compensators, are widely used in power grids. This helpsintroduce the coupling interactions between the devices andthe power grid, resulting in a new sub-synchronous oscillationphenomenon. It is a critical element for the stability operation ofthe power grid and its devices. In this paper, the sub-synchronousoscillation phenomenon of the power grid connected with largescalewind power generation is analyzed in detail. Then, inorder to damp the sub-synchronous oscillation, a coordinateddamping optimization control strategy for wind power generatorsand their reactive power compensators is proposed. The proposedcoordinated control strategy tracks the sub-synchronousoscillation current signal to correct the corresponding controlsignal, which increases the damping of power electronics. Theresponse characteristics of the proposed control strategy areanalyzed, and a self-optimization parameter tuning method basedon sensitivity analysis is proposed. The simulation results validatethe effectiveness and the availability of the proposed controlstrategy.

关键词： Coordinated damping optimization control DFIG self-optimization parameter tuning method subsynchronous oscillation SVG

Voltage phase angle jump characteristic of DFIGs in case of weak grid connection and grid fault

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Journal of Modern Power Systems and Clean Energy 2016年第2期4卷 256-264页

作者： Xinshou TIAN Gengyin LI Yongning CHI Weisheng WANG haiyan tang Xiang LI State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University) Changping DistrictBeijing 102206China China Electric Power Research Institute Haidian DistrictBeijing 100192China

In the condition of connecting large scale doubly-fed induction generators (DFIGs) into weak grid,the closely coupled interactions between wind generators and power grid becomes more *** new fault characteristics including voltage phase angle jump will emerge,which will influence the power quality of power ***,there are very few studies focusing on the mechanism of voltage phase angle jump under grid fault in a weak grid with wind turbine *** paper focuses on the scientific issues and carries out mechanism studies from different aspects,including mathematical deduction,field data analysis and time domain *** on the analysis of transientcharacteristics of DFIGs during the grid fault,this paper points out that the change of terminal voltage phase angle in DFIGs is an electromagnetism transition process,which is different from conventional synchronous ***,the impact on transient characteristics of voltage phase angle are revealed in terms of fault ride through(FRT) control strategies,control parameters of current inner-loop of rotor-side converter and grid strength.

关键词： DFIGs Weak grid Fault ride through Voltage phase angle jump

Transient characteristics and adaptive fault ride through control strategy of DFIGs considering voltage phase angle jump

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Journal of Modern Power Systems and Clean Energy 2017年第5期5卷 757-766页

作者： Xinshou TIAN Yongning CHI Weisheng WANG Gengyin LI haiyan tang Zhen WANG State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteHaidian DistrictBeijing 100192China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityChangping DistrictBeijing 102206China

Wind power in China has experienced fast development in recent years. However, areas rich in wind power resources are often far away from loads centers,which leads to weak connection between wind turbines and power grid. When a grid fault occurs, new transient characteristics in weak grid integrated with doubly-fed induction generators(DFIGs) may present, such as voltage phase angle jump. Current control strategies for wind turbine with strong grid connection are hard to be adapted under weak gird connection. This paper explores the transient characteristics of DFIGs under voltage phase angle jump through analyzing the operation and control characteristics of DFIGs connected into weak grid when the voltage phase angle jumps. Fault ride through(FRT) control strategy of DFIGs based on adaptive phase-locked loop is proposed to adapt weak grid condition. The reference frame of the proposed strategy will be changed in real-time to track the operation condition of DFIGs according to the terminal voltage, and different phase tracking method is adopted during the grid fault. Field data analysis and time domain simulation are carried out. The results show that voltage phase angle jumps when a grid fault occurs, which weakens the FRT capability of DFIGs, and the proposed FRT control strategy can optimize transient characteristics of DFIGs, and improve the FRT capability of DFIGs.

关键词： DFIGs Voltage phase angle jump Transient characteristics Adaptive FRT control strategy

Fault Ride Through Strategy of DFIG Using Rotor Voltage Direct Compensation Control Under Voltage Phase Angle Jump

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CSEE Journal of Power and Energy Systems 2019年第4期5卷 515-523页

作者： Xinshou Tian Weisheng Wang Xiang Li Yongning Chi Yan Li haiyan tang State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems(China Electric Power Research Institute) Beijing 100192China State Grid Beijing Changping Electric Power Supply Com-pany Beijing 100031China

Wind power has developed rapidly in recent years,and large-scale wind power facilities connected to power grids will bring many new *** new operation charac-teristics of power grids with doubly-fed induction generator(DFIG)may exhibit,for example voltage phase angle jumps(VPAJ).VPAJ can negatively impact the fault ride through(FRT)performance of *** paper firstly investigates the physical mechanism and the operation characteristics of DFIG with *** is noted that the current control strategies designed for voltage amplitude changes are not suitable for ***,the paper develops an FRT optimization control strategy under VPAJ which optimizes the DFIG operation ***,simulations of a 250 MW wind farm are presented which validate the proposed FRT strategy.

关键词： DFIG FRT strategy rotor voltage direct compensation control voltage phase angle jump

Overview of Mechanism and Mitigation Measures on Multi-frequency Oscillation Caused by Large-scale Integration of Wind Power

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CSEE Journal of Power and Energy Systems 2019年第4期5卷 433-443页

作者： Yongning Chi Bingjie tang Jiabing Hu Xinshou Tian haiyan tang Yan Li Sujuan Sun Lei Shi Lei Shuai State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research InstituteBeijing 100192China Huazhong University of Science and Technology Wuhan 430074China NARI Group Corporation Nanjing 211000China Siemens Gamesa Renewable Energy A/S Brande 7330Denmark

In recent years,the large-scale integration of re-newable energy sources represented by wind power and the widespread application of power electronic devices in power systems have led to the emergence of multi-frequency oscillation problems covering multiple frequency segments,which seriously threaten system stability and restrict the accommodation of renewable *** oscillation problems related to renewable energy integration have become one of the most popular topics in the field of wind power integration and power system stability *** has received extensive attention from both academia and industries with many promising research results achieved to *** paper first analyzes several typical multi-frequency oscillation events caused by large-scale wind power integration in domestic and foreign projects,then studies the multi-frequency oscillation problems,including wind turbine’s shafting torsional oscillation,sub/super-synchronous oscillation and high frequency *** state of the art is systematically summarized from the aspects of oscillation mechanism,analysis methods and mitigation measures,and the future research directions are explored.

关键词： High-frequency resonance multi-frequency oscillation sub-synchronous oscillation super-synchronous oscillation wind power integration

Analysis of the Role of Nursing Intervention in Operating Room in the Prevention of Incision Infection in Orthopedic Aseptic Surgery

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Journal of Clinical and Nursing Research 2023年第4期7卷 94-99页

作者： haiyan tang Surgical Department Xinghua City People’s HospitalTaizhou 225700Jiangsu ProvinceChina

Objective:To explore and analyze the role of nursing in the operating room in the prevention of incision infection in aseptic orthopedic ***:68 patients that underwent aseptic orthopedic surgery in our hospital from January 2021 to December *** were divided into a research group(n=34)and a control group(n=34)by the random number table *** patients in the control group received conventional nursing intervention in the operating room,and the patients in the study group received the optimized and modified nursing intervention in the operating room;then,the related indicators of nursing intervention of the two groups were ***:The incidence of incision infection in the study group was lower than that of the control group(P<0.05);the average duration of surgery and length of stay the study group were lower than those in the control group(P<0.05);the stress response indexes of patients in the study group were lower than those in the control group 24 hours after operation(P<0.05);the degree of satisfaction of the patients in the study group to the services provided by the nursing staff was significantly higher than that of the control group(P<0.05).Conclusion:High-quality nursing intervention in the operating room for aseptic orthopedic surgery patients can significantly reduce the incidence of incision infection,reduce the stress response caused by surgery,shorten the duration of surgery and length of stay,and improve nursing satisfaction,which makes it worthy of popularization.

关键词： Nursing intervention in the operating room Aseptic orthopedic surgery Incision infection

Research on Landscape Design of Waterfront Public Space in Mountainous Cities Based on User Experience-Taking the Waterfront Landscape Design of Art Peninsula in Chongqing as an Example

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Journal of World Architecture 2024年第5期8卷 47-53页

作者： haiyan tang Miaoqing Zhang Chongqing Institute of Engineering Chongqing 400056China

Mountainous cities are dominated by mountainous,hilly,and steep terrain,which brings certain complexity and particularity to the planning and construction of waterfront spaces in these cities compared to plain *** spaces,often serving as the core areas of city development,possess favorable location advantages and special attributes of water-land intersection,giving them more possibilities for functional transformation[1].However,the ultimate goal of design is to provide users with a vibrant waterfront *** design of waterfront spaces should focus more on people’s behavioral needs,allowing users to feel a good interaction between the place and their behavioral needs during space usage[2].Therefore,the design incorporates human environmental behavior,increases interactive experiences,and enriches spatial interest.

关键词： User experience Interaction Waterfront landscape design