EDI技术在物流配送中心的应用研究

本文对EDI技术在物流配送中心的应用进行了深入研究,设计了EDI在物流配送供应链系统中的应用框架,对我国物流配送企业的发展有一定的指导作用。     

An Application of an Integrated Transport Network– Multiregional CGE Model: a Framework for the Economic Analysis of Highway Projects

This paper develops a framework for the economic analysis of highway projects that is then used to estimate the dynamic economic effects of a highway project on the economic growth and the regional disparity in Korea. The framework is composed of a transport model and a multiregional Computable General Equilibrium (CGE) model. The transport model measures a change in interregional shortest distances and the accessibility due to the highway project. The CGE model estimates the spatial economic effects of the project on GDP, the price, exports, and the regional distribution of wages and population. The simulation allows policy makers to determine which highway development deserves the priority for investment, based on consideration of economic growth and regional economic equity in the long run. The simulation found that all the highway projects have positive effects on GDP and export growth as well as regional equity in terms of wage and population.     

市场集中与空间集聚:现代产业组织演进的两条基本路径

市场集中和空间集聚作为现代产业组织演进的两条基本路径,分别从企业内部与企业之间推动产业组织形态的调整与演进。在工业化发展的不同历史时期,二者在产业组织体系中所处的地位与所起的作用是不同的。二者在功能上不能完全互为替代,在发展趋势上呈现相互融合、功能互补的态势。在我国的现阶段,产业的市场集中和空间集聚都有待于得到进一步的发展和壮大。与此同时,应采取积极有效的途径,实现二者的融合发展。     

基于空间地域差异的新疆城镇化道路探析

西部地区城镇化发展水平滞后,已经不适应西部和全国经济发展的需要,日益成为影响全国现代化进程的重要因素,客观上加剧了城乡矛盾和地区矛盾。文章通过在人口、铁路两方面划分新疆空间地域,分析城镇化建设现状及存在的问题,寻求一条符合新疆地区特点的特色城镇化道路,促进新疆地区经济发展,从而带动西部城镇化建设。     

论崛起三角向均衡三角的有机扩散——基于“两个大局”战略与大国崛起之路

本文认为从珠三角、长三角和环渤海三大城市群的崛起,到泛珠三角、泛长三角和大环渤海"均衡三角"的有机扩散.这是依照"两个大局"战略并遵循极化与扩散因果关系规律。实现中国这个发展中大国崛起之路:并认为三大城市群崛起主要在于财政分权改革,即实行省级财政承包制与分税制."崛起三角"扩散为"均衡三角"仍需从财政改革再突破.依托"均衡三角"预算平台实行区域财政横向均衡制度.以实现公共服务均等化而又不损坏区域发展竞争的效率机制.并通过剔除常住人口统计中创造财富外溢或享有公共服务外溢等非真实因素后"标准人"的假定与论证.解决了区域内政府间财力均衡公式化分配的难题。     

中国省域经济发展影响因素及其时空规律研究——基于GTWR模型

文章基于2006～2013年中国省会城市数据,应用时空加权回归模型（GTWR）,将时间和空间信息纳入到模型之中,从空间异质性的角度考察我国各个省域的教育、FDI、固定资产投资、产业结构、进出口贸易对GDP的空间交互作用及影响差异。研究结果表明,各影响因素存在着不可忽视的个体差异,这种差异导致经济发展水平在时间,空间分布上具有显著的异质性特征;随着时间和空间的推移,教育对经济发展的促进作用不断增强并呈现出东高西低的格局;FDI对经济增长的推动作用不断增强并呈现出异质性特征;固定资产投资对各地经济增长贡献减弱;进出口贸易对各地经济增长贡献增强。因此,加强各地区教育水平,优化产业 结构成为各地区经济均衡发展的关键。     

Dynamic strategic groups: deriving spatial evolutionary paths

Recent theoretical developments in the domain of strategic groups, specifically those related to cognitive groups and strategic group identity, seem to suggest that strategic group membership is likely to be relatively stable over time and that firms in a strategic group co‐evolve. Yet appropriate data analytic approaches that use information about firms over time to identify stable strategic groups and their evolutionary paths have been lacking. To overcome such limitations, this research proposes a new clusterwise bilinear multidimensional scaling model that can simultaneously identify (1) the number of strategic groups, (2) the dimensions on which the strategic groups are based, and (3) the evolution of the strategy of these groups over time. Our discussion encompasses various alternative model specifications, together with model selection heuristics based on statistical information criteria. An illustration of the proposed methodology using data pertaining to strategic variables for a sample of public banks in the tristate area of New York, Ohio, and Pennsylvania across three time periods (1995, 1999, and 2003) identifies two underlying dimensions with five strategic groups that display very different evolutionary paths over time. Post hoc analysis shows pronounced differences in firm performance across the five derived strategic groups. This article concludes with a discussion of the implications of the findings, as well as potential future research directions. John Wiley & Sons, Ltd. Copyright © 2009 John Wiley & Sons, Ltd.     

基于甲醇燃烧数值模拟的炉膛结构优化

为对炉膛结构进行优化,研究了不同炉膛长径比对甲醇燃烧室的温度分布及甲醛污染物排放的影响。以700kW甲醇锅炉为例,对甲醇燃料的燃烧过程进行数值模拟,将在Chemkin中得到的甲醇燃烧动力学反应机理导入Fluent软件中,并进行模拟分析。结果表明,炉膛最佳长径比为0.41时燃烧室内的燃烧最稳定,甲醛排放量达到最低值。     

随机需求下横向并购供应链网络整合优化策略研究

本文从系统优化视角,针对增设集散中心的横向并购供应链网络整合策略,利用变分不等式建立了随机需求下的整合优化模型。以市场链为主线,以供应链网络均衡理论为基 础,构建了以横向并购供应链网络活动总成本最小为目标的数学模型,通过转换成变分不等式采用改进的欧拉算法进行模型求解。通过数值算例进一步说明了模型的适用性和灵活性,得出了增设集散中心的并购整合策略能够降低供应链网络的平均运营成本的结论,通过对比不同市场紧密程度下产生的供应链网络平均成本协同效应,发现随着市场紧密程度的增加其协同效应更明显,为横向并购供应链网络整合优化提供理论依据与方法。     

The role of geographic distance in completing related acquisitions: Evidence from U.S. chemical manufacturers

Acquisitions often do not reach completion when buyers' initial evaluations change during post‐announcement due diligence investigations, but research offers only limited explanations for when such deal‐cancelling new information will be most common. Drawing from the spatial geography and acquisition strategy literatures, we argue that successful completion of acquisitions can be partially explained by their spatial characteristics. We start by predicting that geographic distance has a particularly strong impact in reducing the likelihood of completing related acquisitions; we then identify contingencies based on multiple forms of direct, contextual, and vicarious experience that can help acquirers overcome the constraints of distance. We test the arguments with a sample of 1,603 domestic acquisitions announced by 724 U.S. chemical manufacturing firms between 1980 and 2004. Copyright © 2015 John Wiley & Sons, Ltd.