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For hard nonmetal raw materials, micro-machining technology of ECM combined ultrasonic vibration is feasible advantageous; however, such technology is featured with low efficiency and great tool wearing[1-2]for flexible metal materials.
Acknowledgements Henan Science and technology research projects References [1] Yongwei Zhu, Zhanhe Wang, Hongying Li , etc.
ASME Journal of Mechanical Design, 2008,130:82 - 101.

             Progress in Bulk 4H SiC Crystal Growth for 150 mm Wafer Production Ian Manning1,a*, Yusuke Matsuda2,b, Gilyong Chung1,c, Edward Sanchez1,d, Michael Dudley3,e, Tuerxun Ailihumaer3,f, and Balaji Raghothamachar3,g 1Compound Semiconductor Solutions, DuPont Electronics and Imaging 5300 11 Mile Road, Auburn, MI 48611 U.S.A. 2DuPont Electronics and Imaging, Chestnut Run Plaza 702/1104G, 974 Centre Road, Wilmington, DE 19805 U.S.A. 3Department of Materials Science and Chemical Engineering, Stony Brook, NY, 11794, USA aian.manning@dupont.com, byusuke.matsuda@dupont.com, cgilyong.chung@dupont.com, dedward.sanchez@dupont.com, emichael.dudley@stonybrook.edu, ftuerxun.ailihumaer@stonybrook.edu, gbalaji.raghothamachar@stonybrook.edu Keywords: 4H SiC, elastic modulus, wafer bow, wafer warp, growth rate, internal stress, nanoindentation, x-ray topography, KOH etching, resistivity Abstract.
As the concentration of Z1,2 defects associated with C vacancies [13] and/or complexes of nitrogen and carbon interstitials [14] has been found to increase with increasing nitrogen levels in epitaxial 4H SiC [14], it is possible that nitrogen affects stiffness indirectly through the formation of point defects in bulk material.
Hallin, High-Power SiC diodes: characteristics, reliability, and relation to material defects, Mater.
Journal of Engineering Research and Applications 5, (2015) 48-52

Materials Science Forum.
Journal of Applied Physics 124.10 (2018)
Materials 15.19 (2022): 6736

Application of Improved Unscented Kalman Filter to AUV Based on Terrain-aided Strapdown Inertial Navigation System Wang Qi*1, a, Li Dong2,b and Zhang Zi-jia3,c Yang Chang-song4,d 1,3,4 School of Information Science and Control Technology, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China 210044 2School of Physics and Electronic Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China 215500 awangqiseu@163.com, blidongseu@163.com, czhzj@126.com, dc.s.yang@163.com Keywords: Autonomous Underwater Vehicle, Strapdown Inertial Navigation System, Terrain-aided Navigation System, Improved Unscented Kalman Filter Abstract.
Introduction Nowadays, ocean exploration is having an increasingly significant role in the development of each country because of the huge material resources therein.
Acknowledgment This work was supported by National Science Foundation of China (61172029), Research Foundation of Nanjing University of Information Science & Technology ( S8110045001) Corresponding Author Wang Qi, wangqiseu@163.com, +86-13912986598 References [1] Jalving B, Gade K, Hagen O, et a.l A toolbox of aiding techniques for the HUGIN AUV integrated inertial navigation system [J].IEEE Proceedings on Oceans,2003,2(3):1146-1153
Novel gravity passive navigation system [J].Journal of Southeast University :English Edition,2006,22(1):59-63

Application of Classified Hierarchical Model to Fault Diagnosis of Electrical System Xiaoqiang Yanga, Jinhua Han, Liuhai Chen and Yaming Gao PLA University of Science and Technology, Nanjing, China ayanglab@126.com Keywords: Electrical system; classified hierarchical model; neural network; fault diagnosis; expert system.
Although all connection lines are collectively bundled into wiring harness, the harness and external protection cover may be scratched or damaged by other material.
Acknowledgements This work was financially supported by the by the Jiangsu Provincial Youth Science Research Foundation of China (BK2012061) and the Youth Science Research Foundation of College of Field Engineering, PLA University of Science and Technology (KYGYZLYY1305).
Journal of Electronics Optics & Control, 2006 (8): 28-34 [5] Joseph C.

In the cloud computing security model, authority management and identity authentication is must done, being conducted to ensure that only people who have relevant permissions to access the Hadoop data; network threat defense is setted up, which realizes intrusion protection; Data encryption is done to prevent data theft; Ensuring the integrity of the data ensures the data will not be tampered with; virtual technology is used to realize dynamic management of material resources and protect the safety of cloud environment., cloud computing security policy model based on the structure of the Hadoop can be obtained on the above of protection strategy.
Nanjing university of science and technology, 2013 [2] Junzhou Luo etc.
Telecom science, 2012.8 [8] YaoFeng Miao etc.
Science and technology, 2012.8 [9] Zhihong Huang etc.
Journal of chongqing university of science and technology, 2012.8

Full Power Back-to-back Test Platform for Large Scale Electrical-Excited Direct Driven Wind Turbine Yan Shuai 1, a, Wang Hong 2,b, Chen Yang 3,c and Liu Anye 4,d 1 Beijing Technical Center, China Energy Equipment Co Ltd, Beijing, China 2 Shenzhen Key Lab. of Wind Power and Smart Grid, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, China 3 Faculty of Information Science and Engineering, Ningbo University, Ningbo, China 4 School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, China a syan@ceec.net.cn, b hongwang@hitsz.edu.cn, c chenyang@nbu.edu.cn, dliuanye@sina.com Keywords: Electrical-excited direct-driven wind turbine; Power conversion; Full power back-to-back; Test platform.
Introduction Since rare-earth permanent magnet listed as national strategy material and restricted seriously by Chinese Government which leading to the price surge, a novel large scale electrical-excited direct-driven wind turbine is a recently developed direct-driven wind turbine technology in China [1-4].
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (61273146) and Shenzhen Key Lab. of Wind Power and Smart Grid (CXB201005250025A).
[4] Liu Wangyu, Chen Long, Gong Yang and Su Zhangming, “Dynamics character analysis of large-scale electric excitation direct driven wind turbine”, Science Technology and Engineering.
[9] Zhou Yangzhong, Hu Yuwen and Huang Wenxin, “Rotor excitation current control strategy of electrically excited synchronous motor drive based on DTC”, Journal of Nanjing University of Aeronautics & Astronautics.

Implementation of Flow of Cushion in DEM The material of cushion of RPCF is usually gravel, medium or fine sand, which can flow under shear loads large enough.
Acknowledgements This work is supported by the National Natural Science Foundation of China (NSFC) (No. 50978112), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, P.
Han: China Civil Engineering Journal.
(Natural Science Edition).
(Natural Science Edition).

Comparative Analysis of the Measurement Methods of Bound Water Content in Municipal Sewage Sludge Weijun Zhang 1, a , Kechun Sun1,b 1 the Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang, China ajgzwj@126.com, bskchun@163.com Keywords: Bound Water Content, Sludge, Measurement Methods.
Centrifugal sedimentation method, at high rotating speed, has some limitations for a viscoelastic material, such as activated sludge.
Acknowledgements This work was financially supported by Luoyang Institute of Science and Technology, Program of Science and Technology Department of Henan Province Commission (112102310661).
Bulletin of National Science Foundation of China, 2002(5): p. 284-286.
Journal of Chemical Engineering of Japan, (1992), 25(1): p. 100-103

The texture of specimen by utilizing waste materials was also studied.
Although the industrial wastes are an environmental problem they can be used as the alternative materials for replacing the materials from natural resources, minerals, commercial raw materials, and so on.
Sobrosa et al. replaced kaolin clay by 5%, 10%, and 20% of RHA for improving ceramic materials.
All raw materials were dried at 200°C for 2 h to remove moisture.
Hossain: IOSR Journal of Environmental Science, Toxicology and Food Technology Vol. 8 (2014), p. 9-18 [2] Information on http://www.thairiceexporters.or.th [3] Information on http://pcd.go.th [4] Y.