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704 results on '"Zhang, Qingjun"'

14. Overall Concept of Space Application Development in China

Author

Li Shuai, Shen Zhiqiang, Hou Yukui, Fu Ruimin, Zhang Zhengning, Jiang Bin, Sun Huijie, Bai Zhaoguang, Zhang Qingjun, and Qi Faren

Subjects
space application system, space-ground integration, application engineering, development direction of space applications, Engineering (General). Civil engineering (General), TA1-2040
Abstract

Space application refers to the direct and indirect technology utilization, product production, and service provision on the ground or in space by utilizing space resources, assets, and conditions. After over 60 years of development, the aerospace industry of China has made significant achievements, with over 400 satellites in orbit. However, the system design, basic database, and standards construction that are closely related to space application still cannot satisfy the requirements of high-quality development. Considering the demand for strengthening China's aerospace industry and the medium- and long-term development requirements of the industry, this study reviews the development status of space application in China and abroad, summarizes the new requirements for spaceapplication industry and technologies in China, and analyzes the challenges faced by space application. Moreover, the general ideas, development goals, and top-level systems of space application for strengthening China’s aerospace industry are proposed. The key directions for the development of space application are explored. Furthermore, we suggest that China should improve policies and regulations associated with the aerospace industry, promote the integration of space, ground, and users, and optimize mechanisms and services of the industry, so as to promote the formation of a coordinated space application pattern that features space-ground-user interactive development and unified standards.

Published
2023
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21. Study on the Liquid Metal Circularly Cooling Closed Chassis Actuated by Electromagnetic Pump

Author

Wang, Xiaolin, Zhang, Qingjun, Li, Lidan, Li, Zhi, He, Zhao, Liu, Yajun, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Duan, Baoyan, editor, Umeda, Kazunori, editor, and Kim, Chang-wan, editor

Published
2022
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46. The influence of two-dimensional currents on the sea surface radar backscattering coefficient.

Author

Chen, Jiajie, Liu, Lei, Liu, Xunchao, Miao, Hongli, and Zhang, Qingjun

Subjects
BACKSCATTERING, WIND speed, WAVE equation, WAVE-current interaction, SOIL moisture
Abstract

In this paper, the current field modulation is described using a solution of the wave action equation. Using an integrated equation model (IEM), a current field modulated scattering model is established. The sea surface backscattering coefficient decreases with increasing current speed. At high wind speeds, the change of backscattering coefficient under 1 m $ \cdot $ ⋅ s−1 current field modulation is about 1 dB. An increase of 60° in the angle between wind and current direction leads to a decrease of 1.5 dB in the modulation coefficient. Finally, the model is verified using satellite data. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Hadoop + Spark Platform Based on Big Data System Design of Agricultural Product Price Analysis and Prediction by HoltWinters

Author

Deng, Yun, Zhu, Yan, Zhang, Qingjun, Cheng, Xiaohui, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Yuan, Junsong, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Cheng, Xiaohui, editor, Jing, Weipeng, editor, Song, Xianhua, editor, and Lu, Zeguang, editor

Published
2019
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