潜水艇装备的发展趋势

本文简要介绍了潜水艇的特点；在未来海陆空立体战争中，潜水艇可以充当的多种角色；潜艇技术和反潜技术之间的相互矛盾以及相互推动和发展。     

Undersea Instrumentation Reliability: Where Away?

The author is concerned with the lack of performance built into many of the instruments provided for today's underseas research: over 35 percent of the ?off-the-shelf? equipment fails to operate as delivered, while 75 percent of the developmental hardware fails to meet specifications, and 50 percent of the delivered developmental equipment fails to work. These figures, in part, detail why our progress is being impeded, and the consensus is that the lack of competent engineering may well be the most serious problem.     

Space Debris Research Activities In China In 2007

The year 2007 was important for us to carry out the Eleventh Five-Year Space Debris Research Action Plan.Through the unremitting efforts of all space debris project research groups,we completed the space debris research projects in 2007 successfully,among which we made the substantive progress in many projects, which has laid a good foundation for the continuous research in the future.     

Prospect Of China's New Generation Of Launch Vehicles

INTRODUCTION With the development of science and technology, mankind's space activities have greatly promoted social progress and produced profound and far-reaching effects.Space technology has turned out to be one field of high technology that exerts the most profound influence on modern society.The continuous     

闻邦椿 著名振动学专家

您长期从事振动学与机械学的研究并开辟了"振动利用工程"这一新学科,请您谈一谈‘振动利用工程"目前的研究情况.     

大学生马克思主义信仰教育:问题与对策

本文在调查研究的基础上对大学生的马克思主义信仰状况进行了分析,找出了理性信仰感性化、信仰分布多元化、入党动机功利化、理论教育不得力等问题.问题的原因有理论教育队伍的素质与教育目标的要求不相适应,教育的方式方法与目标要求不相适应,应试教育的弊端、就业的压力与迷茫、多元信息的吸引与诱惑,马克思主义在大学生信仰中的地位悄然变化等.相应的思路与对策有切实加强师资队伍建设,切实把信仰教育纳入社会系统工程,切实加强党风廉政建设、消除腐败现象对信仰教育的负面影响,切实提高大学生信仰选择能力.     

Initial experiments and analysis of blunt-edge vortex flows for VFE-2 configurations at NASA Langley,USA

A review is presented of the initial experimental results and analysis that formed the basis the Vortex Flow Experiment 2 (VFE-2). The focus of this work was to distinguish the basic effects of Reynolds number, Mach number, angle of attack, and leading-edge bluntness on separation-induced leading-edge vortex flows that are common to slender wings. Primary analysis is focused on detailed static surface pressure distributions, and the results demonstrate significant effects regarding the onset and progression of leading-edge vortex separation.     

Prosperous Multilateral Space Cooperation

The civilization of the world develops with the range of human activity expanding from regional to global,from land to ocean,air and ultimately to space.A new concept of ownership would appear whenever the horizon of human activities was extended.Nations define the limits of land territory,territory of sea and territory of air to     

浅析提高投篮命中率的技术因素

本文分析了影响投篮命中率的各种技术因素,并提出了相应的提高命中率的方法,为篮球教学工作提供有益的参考。     

快速发展的国防无线电计量

介绍了国防无线电计量发展历程、发展现状、计量体系基本结构以及发展方向,提出了未来的发展目标。