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8 results on '"Zhang, Yaodan"'

6. Optimization for Electromagnetic Noise Reduction in Claw Pole Alternator by Rotor Claw Chamfering.

Author

Wu, Shuanglong, Zuo, Shuguang, and Zhang, Yaodan

Subjects
NOISE control, ELECTROMAGNETIC noise, ROTORS, GENETIC algorithms, RESPONSE surfaces (Statistics), ELECTRIC machines, PERMANENT magnet motors, ELECTROMAGNETISM
Abstract

The electromagnetic noise of a claw pole alternator is minimized by rotor claw chamfering in this paper. Taguchi method was first applied to evaluate the importance of all of the six chamfer parameters on the output current and the main magnetic force harmonic, and three strongly influential parameters were later selected. Subsequently, the mathematical models of the output current and the sound power level with respect to the three chamfer parameters were developed using the response surface method. Finally, the three parameters were further optimized using the genetic algorithm. A prototype of the optimally designed claw pole alternator was manufactured and its performance was tested. Results show that the rotor claw chamfer does not decrease the output current but can reduce the noise significantly. The sound power level is decreased by more than 15 dB(A) after optimization. The trailing edge chamfer is better than the leading edge chamfer regarding noise reduction. [ABSTRACT FROM AUTHOR]

Published
2018
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7. An E-Press system based on J2EE and RBAC

Author

Yan He, Zhang Yaodan, Xie Jianfen, and Wu Di

Subjects
Java, business.industry, Computer science, Access control, World Wide Web, Resource (project management), Publishing, Information system, Role-based access control, Electronic publishing, business, computer, Web information system, computer.programming_language
Abstract

E-Press is an important technology of information system which can be applied in almost all the publishing companies and accessed by many types of network clients. This paper introduces an E-Press system which implemented based on Java 2 Enterprise Edition (J2EE) and role-based access control (RBAC) technology. The E-Press system is developed for Huazhong University of Science and Technology Press and can powerfully support the whole resource and business management of the press.

Published
2010

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