丙烯酰胺／α-甲基丙烯酸反相乳液共聚工艺条件探讨

以过硫酸钾为引发剂,采用Speen-80和OP-10作复合乳化剂,进行了丙烯酰胺,α-甲基丙烯酸反相乳液共聚研究,考察了反应介质种类,单体浓度、乳化剂种类及其用量、引发剂种类及其用量、反应温度、反应时间对聚合反应转化率的影响.研究表明,以甲苯为反应介质,单体占乳液的质量分数32.0%,乳化剂占乳液的质量分数1.5%,反应温度为50℃,反应时间为6h,在此反应工艺条件下,单体的转化率可达93.O%以上.     

板栗园节肢动物群落物种多样性研究

2001-2004 年采用系统调查与随机调查相结合的方法在重庆合川对板栗园节肢动物群落的物种多样性进行了研究.研究中共记录节肢动物12 目63 科136 种,其中鉴定到种的有120 种,占88%;制作了136 个种的名录;分析了节肢动物群落的构成,讨论了主要种的生态和经济意义;此外,分析了板栗园树冠主要类群的季节数量消长动态,整个群落和害虫及天敌亚群落个体数量和Shannon-Wiener 生物多样性指数的季节动态.本研究建立了板栗园节肢动物群落生物多样性的信息框架,对了解板栗园生态系统和板栗园害虫的综合治理具有一定科学和应用价值.     

Stress-strain partitioning analysis of constituent phases in dual phase steel based on the modified law of mixture

A more accurate estimation of stress-strain relationships for martensite and ferrite was developed, and the modified law of mixture was used to investigate the stress-strain partitioning of constituent phases in dual phase (DP) steels with two different martensite volume fractions. The results show that there exist great differences in the stress-strain contribution of martensite and ferrite to DP steel. The stress-strain partitioning coefficient is not constant in the whole strain range, but decreases with increasing the true strain of DP steel. The softening effect caused by the dilution of carbon concentration in martensite with the increase of martensite volume fraction has great influence on the strain contribution of martensite. The strain ratio of ferrite to martensite almost linearly increases with increasing the true strain of DP steel when the martensite volume fraction is 22%, because martensite always keeps elastic. But the strain ratio of ferrite to martensite varies indistinctively with the further increase in true strain of DP steel above 0.034 when the martensite volume fraction is 50%, because plastic deformation happens in martensite. The stress ratio ofmartensite to ferrite decreases monotonously with increasing the true strain of DP steel whether the martensite volume fraction is 22% or 50%.     

Experimental study on 830 MPa grade pipeline steel containing chromium

The diversity of microstructure and properties of 830 MPa grade pipeline steel containing chromium was investigated by optical microscope and transmission electron microscopy. The main microstructures were multiple configurations, containing lath bainite and granule bainitc. Mechanical properties test results showed that the yield strength and tensile strength improved with increasing chromium content. The toughness and elongation decreased at the same time, so temper process was introduced. Appling proper temper parameters, the values of toughness and elongation were improved dramatically, and the strength decreased slightly.     

基于多维诱导分量的拓展IOWA算子及其应用

受单一诱导分量不可排序的启发,提出了一种多维诱导分量的拓展IOWA(MIOWA)算子,它可以根据特定背景定义诱导分量的涵义,从不同侧面反映数据分量的若干特性.针对具有自主式特征的协商评价问题,定义了一个二维诱导分量的拓展IOWA算子,使得在多属性信息集结的过程中能够体现方案的相对优势和绝对优势;给出一个决定位置权向量的权数非独裁性协商规则下最大化orness水平的规划模型.最后给出一个算例说明了方法的可行性.     

大宁矿区开采沉陷规律研究

通过对大宁煤矿一个正在开采的工作面进行地面沉陷监测,结合该矿的实际资料,对大宁矿区开采沉降规律进行实测研究,得到了开采沉陷基本参数和典型的山区地表移动分布特征,为以后的矿区开采及地表开采沉陷治理提供理论依据.     

知识自由与图书馆的教育职能

概述了关于知识自由的争论,阐述了在知识自由与图书馆教育职能关系问题上的认识误区,指出保障公民知识自由是实现图书馆教育职能的有效途径.     

太原市垃圾污染及其处理控制措施探讨

随着太原市经济的快速发展,城市垃圾增长速度加快,垃圾污染问题也日益加重.通过对太原市未来几年垃圾增量预测及垃圾处理现状调查与垃圾组分的分析,探讨了太原市城市垃圾处理的有效控制措施.     

晋阳湖水体污染防治方案

分析了晋阳湖水体污染的成因,提出了补水渠截污、人工生态浮床、阿科蔓生态基、生态疏浚、渔业养殖等标本兼治的水质净化技术.     

微机继电保护测试系统的设计

介绍了微机继电保护测试系统的功能、特点、软硬件设计思路以及在开发过程中应注意的问题,并提出相应的解决措施.