谈桥梁裂缝在道桥工程中的影响

本人结合多年参与公路桥梁现场施工工作实践,对部分桥梁在建设过程中常见的一些裂缝类型进行归类总结,通过查找原因分析问题,才能让我们真正地了解各种裂缝的引发成因,进而制订防范措施,达到预防布控之目的。     

A characterization of exact non-atomic market games

Continuous exact non-atomic games are naturally associated to certain operators between Banach spaces. It thus makes sense to study games by means of the corresponding operators. We characterize non-atomic exact market games in terms of the properties of the associated operators. We also prove a separation theorem for weak compact sets of countably additive non-atomic measures, which is of independent interest.     

长江下游港口物流发展对策研究

随着长三角经济的一体化进程推进,区域物流已成为经济发展的瓶颈之一,港口依托物流来实现其可持续发展是大势所趋,本文通过分析长江下游港口发展物流的优劣势,指出了长江下游港口物流建立区域港口物流协同发展策略,并提出了相应建议和对策,以期对政府在统一规划,港口资源整合,江苏的沿江开发以及港口企业的发展有一些帮助。     

关于某水箱维修店氧气瓶爆炸事故之原因分析

提出可能引起氧气瓶爆炸的各种原因,根据调查结果,利用推理论证法和排除法对各种原因进行分析,并从金属失效形式的本质即断裂特征进行分析论证,得出具体的爆炸原因和爆炸性质。     

基于分形理论的广西城市体系空间结构研究

城市是人口和经济的聚集地,城市体系空间结构具有分形几何特征。将分形理论与中心地理论相结合,通过城市体系的关联维数模型计算出广西城市体系空间结构的分维值,发现广西城市体系的空间分布是具有分形特征,城市体系自组织演化在空间结构方面具有优化趋势,可以强化中心、极化南宁核心地位,重点扶持桂林、柳州、北海三个副中心建设,构建"一枢纽、二港口、三通道、四辐射"大通道体系和点轴面相结合发展的广西城市体系空间结构。     

组织内部人际信任关系的破裂与修复

从信任内容、信任性质与信任角色三个方面出发,指出人际信任关系研究的三条路径。从信任者、被信任者、环境因素三个角度梳理出人际信任关系破裂的原因。最后,我们依据信任关系破裂存在的萌芽、僵持、对峙、和解四个阶段,阐述了组织内部人际关系修复的途径与相应策略。     

建国初期乡村雇佣关系的历史考察——以长江中下游6省为例

土改结束至集体化高潮前,雇佣关系作为传统乡村一种重要的资源配置方式,仍然普遍存在。和土改前地权高度集中基础上的乡村雇佣关系不同的是:土改后的雇佣规模——雇工户数和工数大大下降;在雇佣形式上,长工数量和佣期急剧下降、短工数量显著增加;在阶层构成上,雇佣关系主要发生在普通劳动者之间,中农、贫雇农等阶层雇入长工和短工所占比重急剧增加。     

Existence of equilibria in economies with externalities and non-convexities in an infinite-dimensional commodity space

We prove an equilibrium existence theorem for economies with externalities, general types of non-convexities in the production sector, and infinitely many commodities. The consumption sets, the preferences of the consumers, and the production possibilities are represented by set-valued mappings to take into account the external effects. The firms set their prices according to general pricing rules which are supposed to have bounded losses and may depend upon the actions of the other economic agents. The commodity space is L_∞(M,M,μ), the space of all μ-essentially bounded M-measurable functions on M.As for our existence result, we consider the framework of Bewley (1972). However, there are four major problems in using this technique. To overcome two of these difficulties, we impose strong lower hemi-continuity assumptions upon the economies. The remaining problems are removed when the finite economies are large enough.Our model encompasses previous works on the existence of general equilibria when there are externalities and non-convexities but the commodity space is finite dimensional and those on general equilibria in non-convex economies with infinitely many commodities when no external effect is taken into account.     

改善圆钢切断口形变的力分析与方法研究

分析了引发钢件二次加工中切口材料损耗的断口形变力学机理,提出一种动刀片偏离安装、实现滚动切断的改良切制方法。运用Adams分析表明,该方法能改善圆钢在钢筋切断机上的断口圆度,从而能减少钢件二次加工量,提高材料利用率。     

Continuity properties of the private core

Let be a sequence of differential information economies, converging to a limit differential information economy (written as ). Denote by the set of all ε-private core allocations, ε ≥ 0 (for ε=0 we get the private core of Yannelis (1991), denoted by ). Under appropriate conditions, we prove the following stability results