GPS－1400－3型高频振动细筛在二段分级中的应用

本文介绍了ＧＰＳ－１４００－３型高频振动细筛的结构、主要技术参数、工作原理、工业试验和生产情况。实践表明，该机作为二段分级设备，比水力旋流器优越，分级效率高，返矿量少，没有反富集，被认为是细粒物料的有效分级设备。     

我国现代煤矿充填技术发展及其分类

充填开采既是"三下"压煤开采的常用技术途径,又是煤矿绿色开采技术体系的重要组成部分。在简述我国充填开采技术的基础上,对现代煤矿充填技术应用进行了新的分类,对泵送高浓度胶结材料充填、巷道迎头抛矸机胶带充填、采空区架后刮板输送机漏矸充填、混凝土膏体材料充填4种充填技术应用进行了介绍,并分析了现行煤矿充填技术的缺陷及发展方向。     

尖山铁矿选矿厂磨矿分级过程控制

本文分析了尖山铁矿选矿厂磨矿分级生产工艺流程及其控制任务，提出过程自动控制的方案，介绍了用西门子T－M集散控制系统实现磨矿分级自动控制的系统硬件配置及其应用软件设计。     

基于农用地分等的耕地等级折算研究——以呼和浩特市为例

耕地占补平衡由数量型向数量—质量型综合平衡管理的升级,已成为当前土地资源管理工作的重要任务。本文以呼和浩特市为例,在农用地分等成果的基础上,以单位标准粮产量为桥梁,确定耕地质量数量等级折算系数,从而实现耕地占补的数量—质量综合平衡。     

应用RMI指标进行工程岩体分类的方法

RMI岩体分类法成功地吸收了CSIR和NGI分类法的优点，能更好地反映岩块强度和结构面性态对岩体强度的影响，可适用于任何“完整－破碎”岩体的工程分类。本文详细阐述了该方法的基本原理、分类步骤以及参数的确定，并与其它分类法进行了比较。     

包钢选矿厂磁矿系列磨选流程分析及改进

针对包钢选矿厂磁矿系列磨矿选别流程中存在的磨矿产品过磨现象严重,影响选别效果,工艺技术指标偏低、能耗高等问题,对采用阶段磨矿阶段选别新工艺进行研究,实现阶段磨矿阶段选别后,粗选尾矿直接抛尾,提前回收部分合格精矿,粗精矿再磨再选可提高目的矿物的单体解离度,达到优化选别指标,减少选矿加工费用的目的.     

SBS乳化改性沥青的应用

SBS乳化改性沥青具有较好的渗透性、抗疲劳性和防水性,在路面裂缝治理中取得良好效果。SBS乳化改性 沥青稀浆封层具有防渗、抗滑、弥缝和提高路面平整度、改善路面外观的作用,用途广泛。文章还对阳离子乳化沥青与 聚合物乳化沥青的分类及检验标准进行了分析。     

Decomposing regional income inequality in China and Indonesia using two-stage nested Theil decomposition method

The objective of this paper is to present an inequality decomposition method, the two-stage nested Theil decomposition method, which is an extension of the ordinary one-stage Theil decomposition method. The method is analogous to a two-stage nested design in the analysis of variance (ANOVA). It considers the three-level hierarchical structure of a country: region-province-district, and decomposes overall regional inequality, as measured by Theil indices based on district-level mean incomes, into three components: the between-region, between-province, and within-province inequality components. The within-province component is a weighted-average of within-province income inequalities for each province, while the between-province component is a weighted-average of between-province income inequalities within each region. The method uses a district as the underlying regional unit to measure regional income inequality, rather than a province, and thus can analyze the contribution of within-province inequalities as well as between-province and between-region inequalities to the overall regional income inequality in a coherent framework. This paper applies the two-stage nested Theil decomposition method to district-level income and population data in China and Indonesia and explores factors determining regional income inequality in China and Indonesia. Received: October 2000/Accepted: June 2002 The author is grateful to the Foundation of International Education (Kokusai Kyoiku Zaidan) and Japan Society for the Promotion of Science (Grant-in-Aid for Scientific Research No. 12630073) for their financial support, and to anonymous referees for helpful comments.     

基于工作分类的甘特图

文章在网络图与甘特图的基础上对甘特图进行改进，使它能够摒弃图络图和甘特图的缺点，抽取它们的优点提出了基于工作分类的甘特图，扩大了甘特图的应用范围，并研究了由网络图转换到基于工作分类的甘特图的方法。     

North–South transfers vs biodiversity conservation: a trade differential game

Trade relationships connect developed and developing countries. The former produces a consumption good, using labor, capital, and an intermediate “natural” good which is produced in the developing countries using labor and natural species. A finite horizon differential game is settled out. The North decides about either the saving rate or the portion of its disposable income to transfer to the South or both variables jointly. The South selects the range of species used in the production of the intermediate “natural” good required in the North’s productive process. This is a measure of biodiversity loss. The aim of the paper is to study how transfers from North to South affect capital growth and biodiversity conservation.