高校图书馆知识服务模式研究

知识服务是图书情报领域适应知识经济社会发展需求的必然选择,也是高校图书馆服务方式与内容的拓展与深化。通过分析教育教学目标下用户的知识需求,提出构建出面向教育教学的高校图书馆知识服务模式。     

改善高校贫困生成长环境研究

党的十六大提出了在未来二十年要全面建设小康社会的宏伟目标,如何实现这一目标,工作是多方面的,而高校贫困生正是人们应该关注的重点对象。本文主要从高校贫困生的消费现状、贫困生心理、国家资助体系等存在的突出问题人手调查分析贫困生目前现状,并且在前人研究成果的基础上,从国家宏观经济政策和贫困生自身方面提出相应的解决措施。     

电化教学在大学物理课堂教学中的应用

本文从人才素质教育的基础上,介绍了电化教学在大学物理课堂教学中应用的必要性。并根据笔者的体会,介绍了电化学教学对人素质的作用和意义以及进行电化学教学应注意的问题。     

PROBA-3 mission and the Shadow Position Sensors: Metrology measurement concept and budget

PROBA-3 is a space mission of the European Space Agency that will test, and validate metrology and control systems for autonomous formation flying of two independent satellites. PROBA-3 will operate in a High Elliptic Orbit and when approaching the apogee at 6·10⁴ Km, the two spacecraft will align to realize a giant externally occulted coronagraph named ASPIICS, with the telescope on one satellite and the external occulter on the other one, at inter-satellite distance of 144.3 m. The formation will be maintained over 6 hrs across the apogee transit and during this time different validation operations will be performed to confirm the effectiveness of the formation flying metrology concept, the metrology control systems and algorithms, and the spacecraft manoeuvring. The observation of the Sun’s Corona in the field of view [1.08;3.0]R_Sun will represent the scientific tool to confirm the formation flying alignment. In this paper, we review the mission concept and we describe the Shadow Position Sensors (SPS), one of the metrological systems designed to provide high accuracy (sub-millimetre level) absolute and relative alignment measurement of the formation flying. The metrology algorithm developed to convert the SPS measurements in lateral and longitudinal movement estimation is also described and the measurement budget summarized.     

高精度时间频率在空间科学技术中的应用探讨CSCD

自上世纪50年代原子频标出现以后,极大促进了科学技术的发展,随着原子频标的发展,高精度时间频率信息在空间科学技术中将发挥重要的作用。本文介绍了空间高精度时间频率在空间科学、基础物理以及卫星导航技术方面应用前景,并对国外正在开展的空间高精度时间频率技术方面的计划、准备开展的相关应用研究,以及对毫秒脉冲星守时技术也进行了初步探讨,最后给出了开展空间高精度时间频率技术研究的一些建议。     

中外大学生创业教育特点的比较研究

大学生的就业问题已经成为社会普遍关注的热点,自主创业将增加大学生就业机会。以美国为代表的国外创业教育已有近60年历史,形成了比较完整的创业教育教学体系,而我国的创业教育总体上处于起步阶段。面对大学生的创业积极不高,自主创业率低的现状,我国大学生创业教育亟需加强。     

Use of coated silicon field emitters as neutralisers for fundamental physics space missions

Spacecraft neutralisers are required as part of the ion propulsion system for accurate station keeping in fundamental physics missions. This paper describes the use of thin layers of insulating materials as coatings for the gated silicon field emitter array structure used in a spacecraft neutraliser. These thin coatings are postulated to reduce power consumption and reduce overheating. The power consumption and lifetime of aluminium nitride and amorphous hydrogenated diamond-like carbon coatings have been tested by current–voltage and endurance tests. Diamond-like carbon coatings were promising, performing better in endurance tests than uncoated samples, but further work is required to characterise the coating’s physical properties and its effects on field emission. The thermal conductivity of the coating material had little effect on measured sample lifetimes. Aluminium nitride had reduced power consumption compared to diamond-like carbon coated and uncoated samples. A thin (∼5 nm) layer of aluminium nitride was found to be optimal, meeting European Space Agency specifications for the neutraliser engineering model.     

儒家修身思想对大学生自我修养的借鉴意义

修身思想作为儒家学说中的一个重要组成部分,经过历史的锤炼和不同时代的洗礼,特别是在实现人生价值和达到人格的完善方面,积累了诸多的精华.在经济高速发展,外来文化不断融人,社会转型,价值观多元,高校学风浮夸的今天,批判继承儒家修身思想对当代大学生自我修养的提高,有着积极的借鉴意义.     

大学英语分模块教学对促进学生就业的影响

大学英语分模块教学已成为近年来大学英语教学改革新的探索形式。它以培养学生的综合应用能力为出发点,根据不同的课程设置不同的模块;同时着眼于学生未来的就业和个性发展,开设不同的选修模块,满足了不同层次学生的发展需求。     

A BRIEF INTRODUCTION TO GEOSPACE DOUBLE STAR PROGRAM

The Geospace Double Star Exploration Project (DSP) contains two small satel lites operating in the near-earth equatorial and polar regions respectively. The tasks of DSP are: (1) to provide high-resolution field, particle and wave mea surements in several important near-earth active regions which have not been covered by existing ISTP missions, such as the near-earth plasma sheet and its boundary layer, the ring current, the radiation belts, the dayside magnetopause boundary layer, and the polar region; (2) to investigate he trigger mechanisms of magnetic storms, magnetospheric substorms, and magnetospheric particle storms, as well as the responses of geospace storms to solar activities and in terplanetary disturbances; (3) to set up the models describing the spatial and temporal variations of the near-earth space environment.To complete the mission, there are eight instruments on board the equatorial satellite and the polar satellite, respectively. The orbit of the equatorial satellite is proposed with a perigee at 550km and an apogee at 60 000km, and the inclination is about 28.5°; while the orbit of the polar satellite with a perigee at 700 km and an apogee at 40 000 km, as well as an inclination about 90°. The equatorial and polar satellites are planed to be launched into orbits in June 2003 and December 2003 respectively to take coordinating measurements with Cluster Ⅱ and other missions.