关于水泥立窑烟气除尘问题的探讨

本文分析了水泥立窑烟气的特性和我国现有各种除尘设备存在的问题，提出应大力开展水除尘方法的研究。介绍了常用两种水除尘器除尘效率的理论计算公式，可作为研究，设计时的参考。     

地面除尘站在焦化厂出焦除尘的应用

通过对5种出焦除尘工艺的比较，确定了地面除尘站工艺。阐述了地面除尘站工艺的工艺流程和除尘系统组成，分析了出焦除尘的社会效益和经济效益。     

通风除尘系统的计算机辅助设计

针对营养保健锅总厂铸锅车间，设计了通风除尘系统，用计算机辅助设计法，对通风除尘管道进行了设计．测试结果表明：通风系统的运转费用是经济的；各吸尘点的风量是均匀的。     

防止除尘系统结露的设计计算方法

论述了除尘系统结露的原因及结露带来的危害，给出了除尘系统内烟气露点温度的确定方法。提出了防止除尘系统结露的设计计算方法。     

印刷厂纸屑纸粉气力输送及其除尘系统的设计问题综述

总结了印刷厂气力输送和除尘系统的性质特点，任务以及设计技术的探讨和经验体会。成功地为北京新华印刷厂瑞士MARITNI平装联动机生产线配套设计了气力输送和除尘系统，并研制出关键设备－印刷厂专用的纸毛分类分离，收集联合除尘装置，已获中国专利。     

云南省KT型除尘方案在机立窑治污上的首次应用

从机立窑污染治理采用KT除尘方案的实践出发，介绍了KT除尘方案的设计和应用优化，为我省机立窑除尘提供了一个良好的途径。     

棉纺厂清花,梳棉的除尘系统设计探讨

清花、梳棉除尘系统的设计,对改善车间的工作环境有重要意义.但在设计过程中,遇到了一些问题,如何进一步降低系统的能耗,使各除尘设备发挥最佳效益等.本文探讨了清花、梳棉除尘设备配套及设计方法.     

试论除尘系统的节能

就除尘系统所涉及的工艺布置的合理性，阵发性尘源的风量调节，除尘方式的合理选用以及高效低阻除尘装置的研制开发，推广应用等方面在保证劳动和气体排放达标的前提下，如何降低除尘系统能耗的问题进行了探讨。     

离心式除尘风机初探

提出了离心式除尘风机的新概念，介绍了它的结构和工答原理，并对影响其除尘效率的主要因素如粉尘粒径、开孔位置及粉尘浓度等进行了一系列的实验研究。     

气体高温除尘技术研究进展

论述了常用的高温气体除尘技术如陶瓷过滤除尘技术、颗粒层过滤除尘技术、金属微孔过滤除尘技术、旋风除尘技术、静电除尘技术的研究进展,对高温气体除尘技术的前景进行了展望,指出了高温气体除尘技术需要解决的问题。     

钢筋混凝土受弯构件设计变量与裂缝宽度关系的探讨

本文根据砼结构设计规范 GBJ10 - 89有关公式 ,对受弯构件的各设计变量——钢筋及砼材料性能、钢筋直径、梁宽、板厚、受拉区翼缘尺寸等——与裂缝开展宽度的关系进行计算和分析。     

刚果(金)沙巴拉铜钴矿床富钴矿体特征和发现启示

文章对刚果(金)沙巴拉矿区二矿段的富钻矿体特征进行了较为详细的描述,并对矿体的控制程度,水文、工程、环境地质条件和资源利用的可行性进行了简要分析,对资源总量做了初步估算,计算结果为开发提供了依据,经过实际开发已经得到证实,最后对该富矿体的发现提出一定要开拓新思路,不局限原来的模式才可能实现找矿的新突破.     

Voting for highway construction in economic geography

This paper investigates the efficiency of voting for provision of transportation infrastructure such as highways, and discusses the effect on regional structure. The salient conclusions of this study show that voting and political competition engender overprovision of large-scale transportation infrastructure. In addition, consideration of industrial location reveals that the provision of transportation infrastructure exerts a negative effect on development of rural areas.     

刚果民主共和国卡尔维矿区快速锁定找矿靶区的成功要素

寻找铜、钴等多金属资源,减少风险,降低成本,提高勘查效果,在刚果民主共和国加丹加省卡尔维(Kal-we)矿区,实施一套因地制宜的、高效率的综合地质、物探、化探、遥感的工作方法是快速、成功锁定找矿靶区的关键所在。     

Location, agglomeration and infrastructure

Abstract. In this article we discuss the relationships between transportation infrastructure, firm location, agglomeration and regional development. We will argue that the spatial transaction costs faced by modern firms have changed over recent decades, and that this has changed the ways in which transportation infrastructure contributes to form location behaviour and regional economic development. Therefore, in order to analyse these issues, it is necessary to consider the spatial transaction costs faced by modern firms and to investigate the conditions under which reductions in these costs due to infrastructure improvements will allow firms to move. These complex relationships are seen to be mediated via different geography-firm-organisation structures and consideration of these is essential for any realistic evaluation of the role of transportation infrastructure.     

How alcohol-related crashes of different severity interrelate and respond to local spatial characteristics:An evaluation of a common site sales ban on alcohol and gasoline

Highway safety is an important issue in both urban and rural areas. Based upon a unique panel of incorporated cities over a 96-month period from January 1982 to December 1989, this paper evaluates the effects of the State of Californias ban on common site sales of gasoline and alcohol to curb drunk driving. Geographic information systems (GIS) contribute spatial variables to an analysis of the impact of the ban on several categories of alcohol related crashes: fatalities, serious injuries, and property damage. By considering the types of alcohol-related crashes for the five-county Los Angeles area as interrelated, a seemingly unrelated regression (SUR) model locates more precise impacts. Overall the ban appears to reduce fatalities, serious injuries, and property damage crashes; but in relatively less population dense cities, the ban increases property damage and may increase more serious crashes in some urban neighborhoods. This suggests that the ban discourages highly impaired drivers but may motivate less impaired drivers to travel to an alternate alcohol purchase site. Diverse experiences in adjacent municipalities warn large regional or nation-wide evaluations of highway safety to take care when adopting large region or state fixed effect adjusters in analyses that presume sub-region homogeneity.Received: October 2003/Accepted: February 2004All correspondence to: Clifford A. Lipscomb. The authors would like to express their appreciation to Subrahmanyam Muthukumar for his assistance in preparing the GIS spatial variables. The views expressed in this paper are solely the authors and do not necessarily reflect the views of either the Bureau of Economic Analysis or the U.S. Department of Commerce.     

The distribution of regional property crime and police deployment—The price of equality

This study allows the probability of being apprehended to be a function of the number of police per capita, and assumes that the total supply of police is fixed. A country consists of two communities, which are characterized by their population densities. Minimizing national property crime creates distinct crime rates in both communities. The less-densely-populated community has more police per capita and tolerates a lower level of criminal activity but surprisingly also suffers from a higher crime rate. To balance the crime rate between the two communities, some of the police must be moved from the more-densely-populated community to the less-densely-populated one. The shift must be associated with an increment of national overall crime, the price of achieving outcome equality. This study defines the same crime rate in both communities as the outcome equality. An easily achieved and supervised equality is having the same number of police per capita in both communities, defined as the initial equality. Its price is also the increment of overall national crime. The formulas used to measure both prices are proposed and compared.Received: October 2002 /Accepted: April 2004Financial support from the Alumni Association of the Department of Economics, Soochow University is gratefully acknowledged.     

Spatial duopoly under uniform delivered pricing when firms avoid turning customers away

This paper studies a spatial duopoly under uniform delivered pricing when firms do not ration the supply of the good, thus extending to a spatial context the analysis of oligopolistic markets with no rationing. The paper shows the existence of the equilibrium in prices under different tie-breaking rules (TBR) and compare the features of the equilibria found under these rules, thereby allowing to highlight the importance of the choice of the TBR in studying these models. When consumers buy from the nearest firm in case of equal prices (efficient TBR), any symmetric price pair within a given range is a Nash equilibrium, with each firm serving exactly half of the market line. If demand in each local market is equally split between the firms charging the same price (random TBR), the only equilibrium price is the one that gives zero profits to each firm. The degree of competitiveness of the market crucially depends on the TBR. Under the efficient TBR, all (but one) price equilibria deliver positive profits to both firms. Under the random TBR, the market outcome is very competitive in that firms make zero profits. None of the equilibria found under any tie-breaking rule are allocatively efficient.This paper is based on my DPhil thesis at the University of York. I would like to thank Gianni De Fraja, Keith Hartley, Peter Simmons, Catherine Waddams, Xavier Wauthy and participants to the 1998 EARIE and ERSA conferences for helpful comments and discussion. The paper has also been improved by the very useful comments of two referees of this journal. The usual disclaimer applies.Received: January 2001 / Accepted: January 2003     

Leverage and Elderly Homeowners’ Decisions to Downsize

We study the effect of financial leverage, measured using the loan-to-value (LTV) ratios, on elderly homeowners’ decisions to downsize. Using a 1999–2011 sample of elderly homeowners from the Panel Study of Income Dynamics, we find that a higher LTV ratio increases the propensity to downsize. Elderly homeowners with higher LTV ratios are more likely to move into properties with fewer rooms, to move from single-family properties into multifamily properties, and to move into less expensive homes. Our point estimates suggest that on average, a 10 per cent increase in the LTV ratio is associated with a 7.7–9.7 per cent increase in the probability to downsize.     

刚果(金)Siniapamrara铜钴矿床地质特征及成因

Siniapamrara铜钴矿床位于加丹加铜钴成矿带弧形展布的北西地段,本文对矿区地层、构造、赋矿层位及矿化特征等进行了综合分析:矿区出露的地层主要是新元古界加丹加超群罗安群、恩古巴群、孔德龙古群为主,断裂构造分为两类,一类位于推覆体与地层接触部位;另一类为常规断裂。铜钴矿体主要呈囊状、透镜状形式赋存在断裂破碎带内的R2.1.3含矿地层,具有明显的层控特征,矿石类型为氧化型铜钴矿石。总结矿区控矿因素主要体现在:推覆体、地层和断裂构造3个方面,最终推测该矿床应为经历了沉积成矿、构造和热液改造,后期主要受推覆构造作用影响以及次生氧化富集作用4个阶段,并严格受推覆面控制的层控型铜钴矿床。根据工作程度,提出了下一步工作方向。