室内环境的污染物

室内的环境质量与人体健康的关系很大，所以应从设计、施工、材料运用、验收等诸多方面对室内环境质量进行全面控制。     

在Windows中传递消息

对Windows中的消息传递机制进行了详细的解析，并说明如何使用消息传递函数进行消息的传递。     

论学分制管理模式下的高校学生管理制度改革

实行学分制是高校适应经济社会发展的教学体制创新性改革的必要性选择 .学分制的管理模式是要从人才培养的整齐划一转向培养模式的多样化 ,并注重学生个性发展 .在认真分析了学分制的本质特征以及实施学分制后对学生管理工作的影响后 ,认为学生管理工作是学分制得以顺利实行的重要保证之一 .进而从理论与实践方面 ,进行了学分制管理模式下的高校学生管理制度改革探索     

Resource Search in Unstructured Peer-to-Peer System Based on Multiple-Tree Overlay Structure

We propose a multiple-tree overlay structure for resource discovery in unstructured P2P systems. Peers that have similar interests or hold similar type of resources will be grouped into a tree-like cluster. We exploit the heterogeneity of peers in each cluster by connecting peers with more capacities closer to the root of the tree. The capacity of a peer can be defined in different ways （e.g. higher network bandwidth, larger disk space, more data items of a certain type etc.） according to different needs of users or applications.     

On the verge of <Emphasis Type="Italic">Umdeutung</Emphasis> in Minnesota: Van Vleck and the correspondence principle. Part one

In October 1924, The Physical Review, a relatively minor journal at the time, published a remarkable two-part paper by John H. Van Vleck, working in virtual isolation at the University of Minnesota. Using Bohr’s correspondence principle and Einstein’s quantum theory of radiation along with advanced techniques from classical mechanics, Van Vleck showed that quantum formulae for emission, absorption, and dispersion of radiation merge with their classical counterparts in the limit of high quantum numbers. For modern readers Van Vleck’s paper is much easier to follow than the famous paper by Kramers and Heisenberg on dispersion theory, which covers similar terrain and is widely credited to have led directly to Heisenberg’s Umdeutung paper. This makes Van Vleck’s paper extremely valuable for the reconstruction of the genesis of matrix mechanics. It also makes it tempting to ask why Van Vleck did not take the next step and develop matrix mechanics himself. This paper was written as part of a joint project in the history of quantum physics of the Max Planck Institut für Wissenschaftsgeschichte and the Fritz-Haber-Institut in Berlin.     

The Response of Debris-Flow Events to Solar Proton Flares （Ⅰ）

By analyzing the observation data from Dongchuan Debris Flow Observation and Research Station and historical data from year 1965 to 1990 gotten from National Astronomical Ob-servatories/Yunnan Observatory,the responding of debris flow in Jiangjia Ravine to Solar Proton Flare is studied. The following conclusion can be drawn. Solar Proton Flare,as one of most im-portant astronomical factors,affects the activity of debris flow in Yunnan. Generally,from 1965 to1990,the more active Solar Pro-ton Flare is,the greater the probability of high frequency and large runoff of debris flow is. On the contrary,the less active Solar Pro-ton Flare is,the greater the probability of low frequency,small runoff,and low sediment transport of debris flow is.     

基于可拓-集对的经济策略生成方法

提出经济策略的概念，经济策略不是最优策略，经济策略也不等同于满意策略。经济策略的生成是决策科学研究的一个重要内容。以可拓方法和集对分析为基础，提出一种适合于生成经济策略的新方法——基于可拓一集对的经济策略生成方法，并以赈灾物资的管理为例．介绍该方法的应用步骤。     

加快农业科技成果转化促进农村经济发展--记太原市农业科学研究所

太原市农业科学研究所成立于1979年11月，隶属太原市农业局，属全民所有制事业单位。该所在职人员52人，下设5个科室，其中科技人员41人(高级职称10人，中级职称16人，初级15人)，是太原市唯一集果树、蔬菜科研、推广、服务为一体的农业科研机构。     

液态金属压铸机的实时压射控制系统

为了满足压铸工艺的要求，有必要进行压射机构的改造并对压射实施自动控制．为此，研究了液态金属压铸机压射结构的重新设计及其实时控制，设计了一套对压射进行实时控制的系统，着重研究了该系统的组成、基本原理及其特点．     

有机合成教学谈

本文就如何在有机合成的教学中更加系统全面地介绍各类有机反应、深化课程内容，在教学内容的选择和教学方法的探索与改革等方面提供了一些经验和体会。