期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
长征系列运载火箭控制系统划代研究 被引量:17
1
作者 胡海峰 吕新广 宋征宇 《航天控制》 CSCD 北大核心 2016年第6期15-21,25,共8页
回顾了半个世纪以来中国长征运载火箭控制系统的发展历程,首次开展了控制系统划代和代际发展研究,总结控制系统取得的技术突破,重点对在役的第三代和在新一代运载火箭中应用的第四代控制系统进行了论述,提出了未来一代控制系统的关键技... 回顾了半个世纪以来中国长征运载火箭控制系统的发展历程,首次开展了控制系统划代和代际发展研究,总结控制系统取得的技术突破,重点对在役的第三代和在新一代运载火箭中应用的第四代控制系统进行了论述,提出了未来一代控制系统的关键技术和发展方向,展望了控制系统在重型运载中的应用。 展开更多
关键词 运载火箭 控制系统 划代研究 际发展 重型火箭
下载PDF
COMPARATIVE PERSPECTIVE OF THE URBAN PLANNING HISTORY OF QINGDAO: A MODERN PLANNING LAB OF CHINA
2
作者 龚清宇 《Transactions of Tianjin University》 EI CAS 1998年第1期92-97,共6页
The purpose of this paper is to explore the significance of Chinese invaded cities in the urban planning history through a comparative view of the modern urban planning theories and methodologies of Qingdao (Tsi... The purpose of this paper is to explore the significance of Chinese invaded cities in the urban planning history through a comparative view of the modern urban planning theories and methodologies of Qingdao (Tsingtau) and those of the developed world from the late 19th century to mid 20th century. After reviewing the German Plan in 1898~1906 and the Japanese Plan in 1941, the paper concludes that the basis grounds of the urban planning practices in Qingdao between 1897~1945 were of the realistic physical planning, rather than of the commonly assumed utopian garden city. Therefore, Qingdao, once being a modern planning lab objectively, helped forward the theories and methodologies of the world′s modern urban planning between the late 19th century and mid 20th century. 展开更多
关键词 modern urban planning lab comparative view invaded cities Qingdao
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部