Search

Your search keyword '"Zhang, Shibing"' showing total 164 results
Start Over Author "Zhang, Shibing"
164 results on '"Zhang, Shibing"'

4. A Control Strategy of IGBT Junction Temperature for Electric Vehicle during Start-up Process

Author

LIU Peng, CHEN Zhichu, TANG Xionghui, ZHANG Siyu, ZHANG Shibing, and GU Qiang

Subjects
electric vehicle, igbt, junction temperature control, black module, motor controller, Control engineering systems. Automatic machinery (General), TJ212-225, Technology
Abstract

In the start-up process of electric vehicles, due to low output current frequency of controller, junction temperature fluctuates seriously when output torque is full, which is easy to cause the IGBT chip to have too high junction temperature, and will affect reliability and service life of the module. Aiming at the above problems, a control strategy of IGBT junction temperature in the start-up process of electric vehicle based IGBT speed feedback is proposed. By analyzing the mathematical relationship among speed, current and switching frequency during the starting process, a torque release function is constructed according to the speed feedback, and the upper limit of torque is constantly released to control the junction temperature on the basis of improving the dynamic performance of the vehicle as much as possible. Finally, the feasibility of the proposed control strategy is proved by the Matlab simulation and the measured data of black module.

Published
2023
Full Text
View/download PDF

6. A New Network Intrusion Detection Method Based on Deep Neural Network

Author

Li, Xingwang, Sheng, Zhiwei, Huang, Yuanyuan, Zhang, Shibing, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Sun, Xingming, editor, Wang, Jinwei, editor, and Bertino, Elisa, editor

Published
2020
Full Text
View/download PDF

20. Experimental study on bond performance between deformed steel bar and coal gangue concrete.

Author

Wen, Bo, Gao, Guanyi, Huo, Dewen, Hu, Xiaowan, Zhang, Lu, Kang, Yongkang, and Zhang, Shibing

Subjects
STEEL bars, COAL, BOND strengths, CONCRETE, PERFORMANCE theory
Abstract

Coal gangue concrete (CGC), a great low cost and environment‐friendly material, is considered to be the most effective substitute for normal concrete. The bond performance of steel bar embedded in CGC determines the feasibility of using CGC as structure material. So, this study presents an experimental program to investigate the bond strength of steel bar embedded in CGC compared to the one in normal‐aggregate concrete. The experimental program contains 75 specimens that are tested using the pull‐out test. In this study, coal gangue coarse aggregate replacement ratios (0%, 25%, 50%, 75%, and 100%), water–cement ratio (0.50, 0.45, and 0.40), and rebar diameters (14 mm, 16 mm, and 18 mm) were considered to analyze the variation law of bond strength. The test results show that the bond strength increased slightly with the decrease of water–cement ratio. The bond strength decreased slightly with the increase the aggregate replacement ratio if the replacement ratio was less than 50%. In contrast, the bond strength decreased significantly when the aggregate replacement ratio was more than 50%. In addition, the bond strength increases first and then reduces with increasing of bar diameters. Lastly, a new model of predicting the bond strength between the deformed steel bar and coal gangue concrete was proposed in this study because the widely used prediction models for the bond strength were not suitable for the coal gangue concrete. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

29. Adaptive Channel Status Based Access Class Barring Scheme in C-V2X Networks

Author

Bao Zhihua, Zhang Shibing, and Gongan Qiu

Subjects
Scheme (programming language), Class (computer programming), Computer science, business.industry, Access method, Function (mathematics), Spectral efficiency, Preamble, Terminal (electronics), business, computer, Computer network, computer.programming_language, Communication channel
Abstract

In high-density C-V2X networks, an effective massive access method for group communications is the basis to assure the performance index for different services and to enhance the spectrum efficiency under limited spectrum resource. In the paper, an improved ACB scheme is proposed using channel status information based on computing ability. Firstly, the gNodeB can estimate the traffic density in single cell and generate the ACB factor. Then the gNodeB broadcasts ACB factor under cellular coverage. According to SINR and ACB factor of the received signal, the terminal on board will compute the access probability, and compare with ACB factor. When the access probability is more than ACB factor, the terminal selects a preamble randomly from unused preamble pool with the access probability or 1. The terminal transmits the selected preamble to the gNodeB for finishing the access procedure. The analysis results show that the access collision probability is a function of channel status with the traffic density as the negative component. The simulation results show that the average access collision probability is deceased about 5% - 20% compared with S-Aloha and M2M-OSA schemes in high-density scenarios, and effectively reduces the average access delay.

Published
2021

Catalog

Books, media, physical & digital resources
See catalog results