布袋除尘器光电检漏仪的研制

布袋除尘器检漏仪是根据“朗伯－比尔”定理设计的。它解决了国内除尘及环境实时检测和控制方面的问题。     

Federated spatial databases and interoperability

It is a period of information explosion. Especially for spatial information science, information can be acquired through many ways, such as man-made planet, aeroplane, laser, digital photogrammetry and so on. Spatial data sources are usually distributed and heterogeneous. Federated database is the best resolution for the share and interoperation of spatial database. In this paper, the concepts of federated database and interoperability are introduced. Three heterogeneous kinds of spatial data, vector, image and DEM are used to create integrated database. A data model of federated spatial databases is given.     

板壳结构的迭加模态和模态参加因子

本文以简支正方形平板为例,证实了二维、三维结构存在着迭加模态,说明为了不丢失信息,只测量传递函数矩阵[H(ω)]中的一行或一列是不够的。从理论上证明,若在某一固有频率处有Υ个固有模态,则需测量Υ+1行或列。同时,应用正交理论,对迭加模态进行了正交分离和模态参加因子计算。     

High efficiency D-A structured luminogen with aggregation-induced emission and mechanochromic characteristics

A novel luminogen, CZ2TPAN, with typical D-A architecture was obtained. It shows intramolecular charge transfer and aggregation-induced emission characteristics with high solid-state efficiency of 65.3%. Moreover, it exhibits reversible mechanochromic behavior between crystalline and amorphous states with remarkable emission color change from green (504 nm) to yellow (545nm).     

小型企业MIS开发方案决策模型——多目标Bayes模型

以某无线电厂为实际背景，提出了小型企业ＭＩＳ系统开发方案的决策模型－－多目标Ｂａｕｙｅｓ模型，对我国小型企业选择计算机信息系统开发方案具有一定的借鉴价值。     

压顶梁作用的弹性地基梁法的分析

考虑压顶梁对围护结构的约束作用和土压力的空间效应,对现有弹性地基梁法进行改进,结合工程实例,分析了压顶梁约束下围护结构内力及变形的规律,并与平面问题进行了比较.     

用热电厂碱性废水脱除循环冷却水中Ca^2＋，Mg^2＋的研究

考察用热电厂碱性废水作为循环冷却水或补充水处理药剂的作用，研究了该废水中的碱性物质与循环水中Ca^2 、Mg^2 两种主要离子结合的规律。结果表明：热电厂碱性废水含有大量的氢氧化钙，将其配入循环水中，能与其中的重碳酸钙和重碳酸镁反应，生成难溶的碳酸钙和氢氧化镁沉淀物，降低了Ca^2 ,Mg^2 两种主要离子的含量。如果再配入一定数量的其他碱性废水，则循环冷却水软化效果更为明显。     

多媒体网络教育对教师职业的影响

信息技术进入教育领域，必将引发一场深刻的教育革命。本文介绍了多媒体技术的特点和在教学中的作用，并由此探讨教师在多媒体网络教育环境下的地位和作用，对教师职业的影响和要求，以及亟待解决的问题。     

单片机软件的开发研究

单片机内含的软件决定了单片机的运行和工作，而ＲＯＭ、ＲＡＭ容量对软件的设计开发有很大影响。文中给出了比较实例分析研究了单片机软件的开发手段。     

Gravity wave activity and spectra in the upper mesosphere at Wuhan, China during early March 1996

Sodium layers (75–105 km) were measured by Na lidar on three nights from 1 to 3 of March 1996. The lidar data were used to calculate the relative atmospheric density perturbations and their spectra. The average r. m. s. density perturbations for early March at Wuhan are 5%. The Vertical wave number spectra exhibit power-law shapes with an average slpoes of −2. 12 in the upper mesosphere when the associated density mean quantity of the day was used. Supported by the Fundation of Chinese Academy of Science Ai Yong: born in 1958, Ph. D. graduate student