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Your search keyword '"Fan, Xia"' showing total 2 results
Start Over Author "Fan, Xia" Publication Year Range Last 10 years Publisher american institute of physics
2 results on '"Fan, Xia"'

1. Innovative Design Method of Automobile Profile Based on Fourier Descriptor.

Author

Shuyong Gao, Chaoxing Fu, Fan Xia, and Wei Shen

Subjects
AUTOMOTIVE engineering, FOURIER analysis, MATHEMATICAL analysis, TECHNOLOGICAL innovations, COORDINATES, DIFFERENTIAL geometry
Abstract

Aiming at the innovation of the contours of automobile side, this paper presents an innovative design method of vehicle side profile based on Fourier descriptor. The design flow of this design method is: pre-processing, coordinate extraction, standardization, discrete Fourier transform, simplified Fourier descriptor, exchange descriptor innovation, inverse Fourier transform to get the outline of innovative design. Innovative concepts of the innovative methods of gene exchange among species and the innovative methods of gene exchange among different species are presented, and the contours of the innovative design are obtained separately. A three-dimensional model of a car is obtained by referring to the profile curve which is obtained by exchanging xenogeneic genes. The feasibility of the method proposed in this paper is verified by various aspects. [ABSTRACT FROM AUTHOR]

Published
2017
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2. Control system of neoclassical tearing modes in real time on HL-2A tokamak.

Author

Longwen Yan, Xiaoquan Ji, Shaodong Song, Fan Xia, Yuan Xu, Jiruo Ye, Min Jiang, Wenjin Chen, Tengfei Sun, Shaoyong Liang, Fei Ling, Rui Ma, Mei Huang, Hongpeng Qu, Xianming Song, Deliang Yu, Zhongbin Shi, Yi Liu, Qingwei Yang, and Min Xu

Subjects
TOKAMAKS, MAGNETOHYDRODYNAMICS, PLASMA stability, FUSION reactors, PINCH effect (Physics)
Abstract

The stability and performance of tokamak plasmas are routinely limited by various magnetohydrodynamic instabilities, such as neoclassical tearing modes (NTMs). This paper presents a rather simple method to control the NTMs in real time (RT) on a tokamak, including the control principle of a feedback approach for RT suppression and stabilization for the NTMs. The control system combines Mirnov, electron cyclotron emission, and soft X-ray diagnostics used for determining the NTM positions. A methodology for fast detection of 2/1 or 3/2 NTM positions with 129 x 129 grid reconstruction is elucidated. The forty poloidal angles for steering the electron cyclotron resonance heating (ECRH)/electron cyclotron current drive launcher are used to establish the alignment of antenna mirrors with the center of the NTM and to ensure launcher emission intersecting with the rational surface of a magnetic island. Pilot experiments demonstrate the RT control capability to trace the conventional tearing modes (CTMs) in the HL-2A tokamak. The 2/1 CTMs have been suppressed or stabilized by the ECRH power deposition on site or with the steerable launcher. [ABSTRACT FROM AUTHOR]

Published
2017
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