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Dissipation Analysis of IGBT module in FB-ZVZCS-PWM Converter Xianzheng Liu1, a, Rui Jin1, Kunshan Yu1, Lijun Xie1, Hailong Bao 2, Yu Zhang2, Juan Liu2, Jiajie Che2 1Electrical Engineering New Material and Microelectronics Department, State Grid Smart Grid Research Institute, Beijing 100192, China 2Shanghai Municipal Electric Power Company, Shanghai 200122, China aliuxianzheng@sgri.sgcc.com.cn KEY WORDS: FB-ZVZCS-PWM; IGBT; FWD; Inverter welder; Switching loss ABSTRACT: Along with the government and market take more and more attention to the energy efficiency of power supply, the loss of IGBT module, as the core device, has become a hot topic.
Acknowledgements This work was financially supported by Science and Technology Project of SGCC (SGRI-WD-91-12-001), (SGRI-WD-71-13-006) and (SGRI-WD-71-13-007).
Journal of Tsinghua University: Science and Technology, 2012, 52(11): 1578-1583(In Chinese)
IEEE Trans. on Plasma Science, 2011, 39(1): 364-367

Mohamed Fathimald a,b,c,dSRM Institute of Science and Technology, Vadapalani Campus , India aja5146@srmist.edu.in, babydu99@gmail.com, cdivya2000mean@gmail.com, *dfathimap@srmist.edu.in Keywords: Medical image, brain tumor, classification, deep learning-based tumor classification, image segmentation Abstract.
The grey material that surrounds the cerebrum and is composed of cortical neurons is the cerebral cortex.
References [1] Javaria Amin, Muhammad Sharif, Anandakumar Haldorai, Mussarat Yasmin, Ramesh Sundar Nayak - “Brain tumor detection and classification using machine learning: a comprehensive survey”, Complex & Intelligent Systems, October 2021 [2] Emrah Irmak - “Multi-Classification of Brain Tumor MRI Images Using Deep Convolutional Neural Network with Fully Optimized Framework”, Iranian Journal of Science and Technology, Transactions of Electrical Engineering, 10 April 2021 [3] G.
A Salam, "Brain Tumor Detection Using Various Deep Learning Algorithms,” 2021 International Conference on Science & Contemporary Technologies (ICSCT), 2021

Material and Methods The main instruments and reagents.
[4] Y C Li, R W Yan, C P Zhao: Journal of Anhui University (Natural Sciences) Vol. 31 (2007), p. 82 [5] J L Wang, F Q Wang, Yu J: Chinese Science Bulletin Vol. 53 (2008), p.900 [6] GB 18421-2001.
[10] Y B Hao, H Q Song, Y C Wu: Food Science Vol. 33 (2012), p.219

The parameters are set as follows: Unit type is solid brick and is set to 8nodes；Material property is Isotropic; Elastic modulus E is 3.3Gpa; Poisson's ratio is 0.3; Meshing size is 0.5mm.
Acknowledgement This work was supported by the National Science Foundation of China (Grant No. 60975068), and Shanghai Education Commission Foundation (No. 09ZZ091), and Shanghai Key Laboratory of Mechanical Automation and Robotics Science Foundation (No.ZZ0805) .
(Science and Technology), vol.7,no.4(2001), p.293-296 [2] H.
Journal of System Simulation[J].

Evaluation of Gold Geochemical Anomalies in the Liaodong Paleorift XU Shan 1, WANG Miao 2, LIU Changchun 3, LI Shouyi 1 1College of Earth Sciences, Jilin University, Changchun 130061, China 2Jilin Nonferrous Metal Geological Exploration Bureau, Changchun 130026, Jilin, China 3Liaoning Survey Academy of Geology and Mineral Resources, Shenyang 110032，China Keywords: Liaodong Paleofrifta; Geochemical Anomaly; Multivariate Statistical Analysis; Ore-caused Anomalies Abstract. 89 Au geochemical anomalies are delineated by using 1/200000 regional geochemical exploration data.
The geochemical characteristics of the area In this paper, the geochemical l information is analyzed and also the distribution law related to the mineralization within the studied area is studied on the basis of the previous geological research work, and then the causes and mineralization trend of Au are explained from the perspective of the material flow of element [13].
Earth Science Frontiers, 2012, 19 (3): 49~58
Journal of Geochemical Exploration, 1999, 67 (1~3): 345~360
Earth Science Frontiers, 2003, 10 (1): 257~260.

When one extrapolates this argument to nanomaterials under the different external conditions, one concludes that their thermodynamic and kinetics should differ from the one of bulk material.
Work was also partially supported by the Ministry of Education and Science of Ukraine.
Schmelzer: Journal of Colloid and Interface Science Vol. 181 (1996), p. 503
Alivisatos: Science Vol. 276 (1997), p. 398

The reasons influencing the factor are mainly itself material limits and temperature shock times too frequently on catalyst caused by the frequent start.
Journal of Hebei University of Engineering ( Social Science Edtion).Vol. 27 (1) (2011), in Chinese
Science Press.
Science Press.2010.2 BeiJing(2010) ,in press, in Chinese

Thirdly, Beijing is the nation's cultural center and science & technology center.
Science & technology has become the subject of modern society.
The government contributed 200 million and Municipal Commission of Science and Technology contributed 50 million to get the suburbs of Beijing installed with solar street lamp and solar lamp of which there were about 20,000 solar street lamps.
The advantaged geography and quality and sufficient solar resources lay a material foundation for photovoltaic power generation.
References [1] Deng Junying and Cao Shuyan: Problems and Mode of Sustainable Development of Energy Development in Beijing, 2008(05), Journal of Beijing Electric Power University

From this perspective, those responsible for creation and production evaluate the consequences of processes and materials, looking for alternatives that minimize negative effects as much as possible [14].
The results obtained from the application of the investigation, coupled with the study of the target audience (users), as well as the investigation of the necessary materials, the knowledge of technical and aesthetic details, was possible to advance and reach the final concept of the Product (Fig. 5).
W. (2016) ‘Infant life jacket donning trials using children and their parents: comparison to the Canadian standard’, International Journal of Industrial Ergonomics, 54, [online], p19-25.
Available at: https://www.sciencedirect.com/science/article/abs/pii/S0169814115300639?
Available at: https://www.sciencedirect.com/science/article/abs/pii/S000368701000116X?

Materials and Methods Soil sampling preparation.
Stock solutions of each metal for sample analysis were obtained from Research Center for Chinese Standard Materials.
Acknowledgements The authors greatly acknowledge the National Natural Science Foundation of China (No. 41301338), Hunan Provincial Natural Science Foundation of China (No. 13JJ4069) and Scientific Research Staring Foundation for the introduced talents of Hunan Agricultural University (No. 12YJ12).
[18] M.R.Carter, in: Soil sampling and methods of analysis, Canadian society of soil science.
Hano: Journal of Fermentation and Bioengineering Vol. 86 (1998), p. 207