轻型汽车悬架侧倾角刚度分析

文章通过对某轻型汽车独立悬架和非独立悬架侧倾运动特性的分析,建立了侧倾角刚度的数学模型。     

我国地方政府显性债务问题实证分析

本文对我国某地区显性债务规模与结构进行分析，结果表明，从规模上看，我国地方政府显性债务具有规模庞大，不断扩张，超出了地方财力规模，逾期债务比重较大等特点；从结构上看，我国地方政府显性债务具有来源复杂等特点。同时，通过对债务规模与某些因素的相关分析表明，我国地方政府显性债务规模与地方经济总量存在相关性。     

基于Oracle9i的物流空间信息数据库的一种设计与实现方法

通过Oracle Spatial组件的支持，我们可以在物流系统中实现时空间信息的解决方案。本文探讨了物流空间信息需求，介绍了用Oracle spatial建立物流空间数据库的方法，Oracle可以作为物流空间信息管理分析的一个较好的解决方案。     

城区特征对房贷的影响

城区特征通过多种途径影响商业银行住房抵押贷款决策.商业银行可以根据城区特征判断一个城区的住房抵押贷款违约风险,进而确定对该城区的最低首付款比例或拒贷率.通过分析国外城区特征对商业银行住房抵押贷款决策的影响机制,联系我国实际情况,指出我国商业银行根据城区特征进行住房抵押贷款决策具有合理性,建议商业银行密切关注城区住房价格波动率,并建议政府限制中低收入城区商业银行的数量.     

基于复杂系统的物流企业空间聚集研究

本文把物流行业作为一个复杂系统．从系统的自组织角度出定。通过构造吸引力函数．给出了各地区物流行业投资吸引力的计算方法；同时．引用吸引子的概念描述了物流企业的空间聚集演化动力学系统建模方法；最后，本文分析了北京、天津、上海三地的物流投资吸引力厦聚集特性。     

国家综合配套改革区与制度的空间演化分析

建立国家综合配套改革试验区,不仅是为了促进滨海新区及天津市的发展,更重要的是推动环渤海地区,乃至整个北方地区的发展,形成新的区域发展模式。这就要求在理论上不仅要考虑到技术、制度的因素,也要考虑到空间的因素对国家综合配套改革试验区理论模型的影响。具体研究空间因素对国家综合配套改革试验区的影响有助于准确理解和把握国家综合配套改革试验区的空间作用,形成新的区域增长方式和区域发展模式,为在全国范围内贯彻科学发展观和构建和谐社会提供崭新的思路和视角。     

The Effect of Risk Characteristics on the Willingness to Pay for Mortality Risk Reductions from Electric Power Generation

The objective of this study is to estimate willingness to pay (WTP) for the reduction of mortality risks caused by fossil fuel (natural gas, coal and oil) versus nuclear electric power generation systems and to examine the influence of risk characteristics involved with electric power generation on WTP. A choice experiment was conducted to achieve these objectives. The attributes for nuclear risks in the experiment included the probability of disasters and the expected losses if a disaster occurs. We find evidence of (i) a baseline effect (where WTP is sensitive to hypothetical versus actual baseline expected mortality); (ii) a ‘labeling effect,’ where, surprisingly, the term ‘nuclear’ has no effect on WTP, but the term ‘fossil-fueled power generation’ results in lower WTP; and (iii) disaster aversion, meaning that people focus on the conditional loss from a nuclear disaster, not the probability. We also find that the WTP for reducing deaths from a nuclear disaster is about 60 times the WTP for routine reducing fossil-fuel generation-related deaths.     

武汉大旅游圈的构建与发展模式研究

在迈向２１世纪的关键时期，武汉市提出了建设国际性城市的战略目标。旅游业在实现这个战略目标中的地位、作用以及特定的意义日益引起广泛的关注。本文对武汉市旅游业的发展战略模式──大旅游图的构建要素、职能特点等进行了分析，提出了武汉大旅游圈功能结构和空间结构的具体拓展方案。     

中国发展知识经济的空间结构

发展知识经济可以有效解决中国所面临的诸多挑战。文章探讨了经济发展的空间结构理论、城市与现代经济的关系、中国发展知识经济的路径选择,提出中国发展知识经济的空间结构是“升岛成陆”,即以各级有条件的城市特别是大城市为主先行发展知识经济,然后带动其它地区,扩大发展知识经济的区域,从而最终像地球科学中的升岛成陆造地运动一样,实现全国发展知识经济。同时,要通过行政区划制度创新促进这一进程,要将一些大城市升格为直辖市。     

Racing in two dimensions

In this paper we study an industry in which there is an ongoing sequence of R&D races between two firms. Firms are engaged in product innovation. Products are horizontally and vertically differentiated. There are two key characteristics/dimensions to products, and the level at which these are embodied in products can be increased by R&D. At each time firms can spend R&D on improving their product in one or both dimensions. We allow the possibility of economies scope — so R&D undertaken in one dimension can spillover to the other. The question we are interested in is whether a firm that is ahead in a single dimension but behind in another will focus all its R&D effort in the area in which it is ahead (product specialisation), or whether it will try to do R&D in both dimensions in the hope that it might get ahead in both and end up with a superproduct that dominates in both characteristics. The outcome of this R&D competition determines a Markov transition probability matrix determining the evolution of the industry. We show that when the R&D technology is characterized by constant returns then the only steady-state outcome is one in which the economy stays forever in a position in which one firm produces a super-product and the other gives up doing R&D altogether. This outcome is unaffected by the degree of economies of scope. When the R&D technology is characterised by decreasing returns, then the industry will visit all states and so will exhibit both product specialisation and superproduct dominance at various times. Now the extent of economies of scope matters and we show that the greater the extent of economies of scope, the less likely is the industry to exhibit product dominance, and the more likely it is to exhibit product specialisation.