Search results

The beam is made of graphite/epxoy material system with geometry and material properties given in Tab. 1[4].
This model considers effects of elastic coupling terms induced by anisotropy of materials and geometric nonlinearity and rotation of rigid body and is capable of analyzing and predicting nonlinear free vibration behaviors of rotating composite thin-walled beam with large deformations.
Acknowledgements The authors acknowledge the financial support of the Natural Science Foundation of China (No.10972124,11272190) and the Natural Science Foundation of Shandong Province (No.
Journal of the American Helicopter Society,1999,44(3):188-205

Simulation Study for the Structural Cell Design Optimization of 15kV SiC p-Channel IGBTs Xiaoli Tian1,a*, Ben Tan2, Yun Bai1, Jilong Hao1, Chengyue Yang1 and Xinyu Liu1 1Institute of Microelectronics of Chinese Academy of Sciences, Beijing, China 2University of Electronic Science and Technology of China, Chengdu, China atianxiaoli@ime.ac.cn Keywords: 4H-SiC, IGBT, High Voltage, JFET Region Abstract.
Introduction Silicon Carbide (SiC) is an attractive material for high voltage, high frequency and high temperature applications due to its superior material properties, such as the wide bandgap, high critical electric field, and high thermal conductivity.
The material parameters used in present simulations are listed in Table 1 and in Table 2.
[4] Tetsuya Miyazawa, Koji Nakayama, et al, Epitaxial growth and characterization of thick multi-layer 4H-SiC for very high-voltage insulated gate bipolar transistors, Journal of Applied Physics, 118, (2015) 085702
Okumura, An Investigation of Material limit Characteristics of SiC IGBTs, Mater.

Design of high-gain amplifier for Soft X-ray imaging diagnostic system on J-TEXT tokamak Zhengyu Xiao1,2,a, Xiaoqing Zhang1,2,b, Yonghua Ding1,2,c, Jianchao Li1,2,d 1State Key laboratory of Advanced Electromagnetic Engineering and Technology, 430074, Wuhan, China 2School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China azyxiao@hust.edu.cn, bxqzhang_1012@126.com, cyhding@mail.hust.edu.cn, dlijianchao07@126.com Keywords: the photodiode amplifier; Soft X-ray imaging diagnostic system; J-TEXT Abstract.
J-TEXT (The joint texas experimental Tokamak) is a medium-sized tokamak and it was re-established at Huazhong University of Science and Technology.
Solid-State Circuits, IEEE Journal of 2.3 (1967): 65-73
Gu, et al. " Research progress of electromagnetic shielding materials." 
Materials Review 19.2 (2005): 53-56.

The material for the cylinder cove is AZ91D Mg-Al-Zn alloy, which has excellent casting ability and high strength and are widely used in the automotive die casting.
Acknowledgement The project was supported by the research project of education science of Qiqihar University (Grant 2013072) Reference [1] Y.Y.
Prospects for the Development of the New Metallic Material Magnesium Alloy[J].
Science & Technology Review, 2002,20(0210):37-39 [2] Y.Z.
Journal of Materials Processing Technology, 2002, 127(2): 238~241 [7] Q.M.

Landsat Satellite Image Quality Improvement Using Discrete Cosine Transform Method Deddy Rahmadi1,a* and Silvia Rachmawati1,b Department of Mathematics, Faculty of Science and Technology, UIN Sunan Kalijaga Yogyakarta, Yogyakarta 586117, Indonesia adeddy.rahmadi@uin-suka.ac.id, bslvrachma@gmail.com Keywords: Singular value decomposition, Discrete Cosine Transform, Landsat Satellite Image, Image Processing.
Research Materials The research materials are quantitative.
Scientific Journal of WIDYA, 1(2), 167-174
Basic Science, 2021 10(1) 16-23

Design of Nut Machine Vision Inspection and Screening Systems Based on PC YU Zhong an, WANG Chun li, GUO Pei yu, Kong Kan College of Electrical Engineering and Automation of Jiangxi University of Science and Technology, Gan Zhou, China Email:wangchunli1218@126.com Key words: nut; machine vision; image processing; a single-chip microcomputer; Abstract: This system use PC as the core of image analysis and processing, with the single chip processor as the control core execution, combining with machine vision image processing technology, using advanced image processing algorithms, to achieve separation of the nut, and through experiments to test the correctness of the algorithm.
Fig. 1, The hardware structure of nut test screening system diagram ①material gear ② photoelectric sensor 1, ③ baffle , ④ genuine export ⑤ defective exports , ⑥cannot be detected exports After the operators load the material to the glass turntable, nut that waiting for test rotate with the wheel.
When transferred to the material gear, due to the rotation gear, coupled with the rear of the damper, it could place the untested nut to the visible range lens for test.
JiNan: ShanDong University, 2006 [5] Yuan Li, Improved randomized Hough transform algorithm for circle detection, Journal of Computer Applications, 2010 [6] Li-ping Qin.
Accurate measurement of research based on digital image processing, Harbin: Harbin University of Science and Technology, 2008 [7] An Bing Li.

Study on Relationship between the Groove Structure and Efficiency of Electromagnetic Pump Used in Aluminum Alloy Casting Jibo Hou a，Yun Liu b，Yougen Peng c，Renjie Huang d School of Materials Science and Enginnering; North University of China; Shanxi Taiyuan 030051; China ahoujibo@nuc.edu.cn bliuyun@nuc.edu.cn cpengyougen@nuc.edu.cn dhuangrenjie124@163.com Key word:Electromagnetic Pump; Groove Structure; Efficiency; Aluminum Alloy Casting Abstract.The relationship between the groove structure of the direct current plane electromagnetic pump and efficiency has been investigated in this paper.
In order to facilitate research, the first we use the medium of mercury as a pump in a transparent plexiglass material on the test .when we get regular on simulation equipment.
Pump body interinging liquid tube and rising liquid tube are transparent material, which are easy to experiment observing the height of liquid. the current can import from metal electrode to the liquid metal, the electric field perpendicular to the direction of the opening solenoid installed in the groove on both sides.
BeiJing：Special casting and Nonferrous alloy . 2006，vol.26(6), 344-336,In Chinese [4] Zhi-jue Quan，Jing Yang，You-gen PengSimulation .Taiyuan: North University of China journal. 2002, vol.23(2) , 735-737,In Chinese [5] Chinese institute of mechanics、Shanghai electric scientific research team of electromagnetic pump.
Beijing:Science press.1979, 1-5,11～13,30～40,In Chinese

Introduction The sequence for lift-off is shown in figure1.Lift-off process in micro-structuring technology is a method of creating structures of a target material on the surface of a substrate using a sacrificial material [1,2].
Vacuum Science and Technology. 14 (1994) 215-219
Functional Materials. 3 (2005) 431-433
Campbell, The Science and Engineering of Microelectronic Fabrication Second Edition, first ed., Publishing House of Electronics Industry, Beijing, 2003
Chinese Journal o f Electron Dev ices. 33 (2010) 557-560

UV Ageing Test and EIS Study of Fluorocarbon Resin Coatings on Galvanized Sheet Lei Wang1,2,a, Chengqiang An1,b, Jie Sun1,c , Haiyun Yu2,d and Changsheng Liu2,e 1Shenyang Ligong University School of Environmental and Chemical Engineering, Shenyang 110159, China. 2Key Laboratory for Anisotropy & Texture of Materials, Ministry of Education, Northeastern University ,Shenyang 110004, China amailwl@163.com, bacq306@163.com, cjiersun2000@yahoo.com.cn, dyuhy2010@yahoo.cn, ecsliu@mail.neu.edu.cn Keywords: Fluorocarbon resin coatings; galvanized sheet; EIS;UV ageing Abstract.
Introduction Organic polymer materials are widely used in corrosion protection coatings, ornament and surface functionalization.
Yan: Journal of Chinese Society for Corrosion and Protection Vol. 26 (2006), p. 89 [2] J.M.
Li: Corrosion Science Vol. 50 (2008), p. 3322 [7] C.N.
Zhang: An Introduction To Electrochemical Impedance Spectroscopy, Science Press, Beijing(2002).

The figure 4 indicates the structure parameters (material properties: Poisson ratio of 0.29, mass density of 7.82E-6（Kg/mm3）, modulus of elasticity of 2.068E+8（mN/mm2））.
Fig.4 The geometry and material parameters of a stiffened plate steel structure Fig.5 The effect of eccentricity of beam element on modal frequency The figure 5 shows us the effect of eccentricity of beam element on modal frequency (based on the result of regular hexahedron element).
Applied Mechanics and Materials, Vol.66-68(2011), p 2192-2197
Journal of Zhejiang Ocean University (nature science), vol. 26(2007), p. 51-55.I
Mechanical Science and Technology, vol. 18(1999), p. 210-212.