Zhuzhou Electrical Locomotive Research Institute Co.

Zhuzhou, China

Zhuzhou Electrical Locomotive Research Institute Co.

Zhuzhou, China
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Lu L.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Lu L.,University of Chinese Academy of Sciences | Liu C.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Liu C.,University of Chinese Academy of Sciences | And 6 more authors.
Sustainability (Switzerland) | Year: 2017

Mapping soil texture in a river basin is critically important for eco-hydrological studies and water resource management at the watershed scale. However, due to the scarcity of in situ observation of soil texture, it is very difficult to map the soil texture in high resolution using traditional methods. Here, we used an integrated method based on fuzzy logic theory and data fusion to map the soil texture in the Heihe River basin in an arid region of Northwest China, by combining in situ soil texture measurement data, environmental factors, a previous soil texture map, and other thematic maps. Considering the different landscape characteristics over the whole Heihe River basin, different mapping schemes have been used to extract the soil texture in the upstream, middle, and downstream areas of the Heihe River basin, respectively. The validation results indicate that the soil texture map achieved an accuracy of 69% for test data from the midstream area of the Heihe River basin, which represents a much higher accuracy than that of another existing soil map in the Heihe River basin. In addition, compared with the time-consuming and expensive traditional soil mapping method, this new method could ensure greater efficiency and a better representation of the explicitly spatial distribution of soil texture and can, therefore, satisfy the requirements of regional modeling. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.


Liu X.D.,University of Electronic Science and Technology of China | Jin J.X.,University of Electronic Science and Technology of China | Wen L.,Zhuzhou Electrical Locomotive Research Institute Co.
2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2015 - Proceedings | Year: 2015

A measurement instrument used for evaluating the superconducting properties of high temperature superconductors is proposed. Due to its special design, it can readily measure the properties with user-friend operation. Its flexible structure can also be adapted to different parameters measurement only by modifying the input initial parameters. © 2015 IEEE.


Peng Y.,Southwest Jiaotong University | Peng Y.,Zhuzhou Electrical Locomotive Research Institute Co | Ouyang J.,Southwest Jiaotong University | Que H.,Southwest Jiaotong University | And 3 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2016

Air-cooled proton exchange membrane fuel cell(PEMFC) is fuel cell with opening cathode and without external humidification equipment. Therefore, the temperature and humidity of air in cathode entrance of air-cooled PEMFC will exert important influence on the operating performance of the fuel cell. The connection of the optimal operating temperature of air-cooled PEMFC with the ambient temperature, humidity and the output current was studied based on experiments, the effect of different ambient temperatures and humidity and different currents on optimal operating temperature of air-cooled PEMFC was analyzed. Finally, the control system of air-cooled PEMFC was worked out, and the optimal operating temperature control in different ambient temperature and humidity was achieved with PID controlling method according to the optimal operating temperature curve of air cooled PEMFC drawn in different ambient temperatures and humidity. © 2016, Editorial Board of Acta Energiae Solaris Sinica. All right reserved.


Li X.,Central South University | Li X.,Zhuzhou Electrical Locomotive Research Institute Co. | Zhao P.,Zhuzhou Electrical Locomotive Research Institute Co. | Han D.,Zhuzhou Electrical Locomotive Research Institute Co.
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2013

According to the active yaw theory of a megawatt-class draught fan, a vibration model of the yaw system of megawatt-class draught fan was built and simulation analysis and experiments on the yaw system friction instability generating in the course of active yaw were conducted based on the damping ratio of friction instability. The results show that over preloaded torque and static friction coefficient mainly cause the instability vibration phenomenon of the yaw system, and a reasonable value of preloaded torque and static friction coefficient can avoid the phenomenon effectively occurring in the active yaw course.


Liu X.D.,University of Electronic Science and Technology of China | Jin J.X.,University of Electronic Science and Technology of China | Wen L.,Zhuzhou Electrical Locomotive Research Institute Co.
IEEE Transactions on Applied Superconductivity | Year: 2016

A multifunction measurement instrument used for evaluating properties of applied superconductors and their device applications has been developed. It is able to carry out measurements with user-friendly and flexible operation. Its flexible design can also be applied to suit the measurement of different properties by modifying the initial input parameters and calculation methods. Examples of applications are presented to verify the method and instrument, along with detailed theoretical calculations and testing results. © 2002-2011 IEEE.


Chu Y.,Hunan University | Huang S.,Hunan University | Kong F.,Zhuzhou Electrical Locomotive Research institute Co. | Liao W.,Hunan University
Dianwang Jishu/Power System Technology | Year: 2015

Modular multilevel converter based HVDC (MMC-HVDC) transmission usually adopts double closed-loop vector control with PI, which has several problems such as slow response to disturbance and needs decoupling control under rotating coordinate. Therefore a new steady state control scheme of MMC-HVDC based on internal model controller is proposed under two-phase stationary coordinate. Firstly the mathematical model of MMC-HVDC system under two-phase stationary coordinate is introduced. By analyzing features of internal model control method, the control structure and parameters of the current cycle are designed, and a double closed-loop control system based on IMC inner-cycle and PI outer-cycle is built. The steady-state and dynamic performance of the proposed controllers under different operation conditions are shown with simulation of MMC-HVDC system in Matlab/Simulink. Simulation results show that the proposed controller really can suppress bus voltage fluctuations effectively, and respond quickly to load changes, greatly improving the robustness of the system. ©, 2015, Power System Technology Press. All right reserved.

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