淮南矿业集团铁运公司网络传输系统实现

本文介绍了淮南矿业集团铁路改扩建工程中网络传输系统设计实现，其中包括系统组成、拓扑结构、组网方式、系统保护方式等方面，该网络传输系统的投入使用，大大提高了网络管理的效率，减少了人为事故。     

ARCGIS基于规则的拓扑在地籍数据中的应用

运用ARCGIS的拓扑规则检查模块对地籍数据进行检查和处理的方法进行了探讨。     

RIP与OSPF协议在中小型网络中的性能研究

论文从网络的拓扑结构与网络设备的性能指标入手,从rip协议与OSPF协议在中小型网络中的运行机理与算法入手,通过分析协议在网络中的稳定性、传输性能等综合性能标,研究了rip协议与OSPF协议的具体算法,最后综合网络设备的性能指标与网络的拓扑结构得出两种协议的最佳匹配网络匹配环境。     

赋权图的拓扑空间

本文对水路运输、交通运输中的赋权图定义了对应的拓扑空间,并讨论了相关的拓扑性质,证明了此类空间具有的强分离性质及紧性.对传统的Dijkstra方法进行改进,为最优化运输方案提出了一种算法,使得这种算法更容易理解和计算.     

On the definition of differentiated products in the real world

Summary. This paper proposes an abstract model of commodity differentiation that incorporates manufacturing imprecision and dimensioning and tolerancing standards. The potential consistency of such a model based on engineering consideration is analyzed. For a large pure exchange economy, competitive equilibria exist and are Pareto optimal. Production issues such as the derived demand for intermediate products, continuity of cost functions, and product selection and technology issues such as mass customization, agile manufacturing, and manufacturability are discussed.Received: 21 June 2003, Revised: 1 March 2004, JEL Classification Numbers: D51, L15, D21.This work was supported by the National Science Foundation through research grants DMI-9816144 and DMI-0070257. This paper was presented at the Institute of Economics, University of Copenhagen in Fall 2000. As always, Birgit Grodal was an energetic and enthusiastic academic host during my month-long visit. I wish to thank Marcus Berliant for a long, pleasant, and helpful conversation. An anonymous referee read the paper carefully and provided helpful comments.     

不对称PWM半桥零电压DC/DC变换器的仿真

分析了不对称脉宽调制半桥ZVS DC/DC变换器电路在一个开关周期中的8个工作阶段,通过Or-CAD仿真软件对主电路进行了仿真分析,得出了一些有益的结论.     

传递路径分析在提升变速箱NVH性能中的应用

本文立足整车系统对变速箱NVH性能进行优化,过程中应用Opti Struct技术对半轴支架进行基于模态频率的拓扑优化,根据优化模型得到工程样件并进行测试验证,最终达到优化设计要求。     

我国上市公司跨区域并购复杂网络研究

跨区域并购活动在一定程度上反映了产业的重组及转移规律。以1999～2014年我国上市公司跨区域并购事件为样本,通过建立跨区域并购复杂网络,实证分析网络的拓扑结构特征,挖掘网络背后所蕴含的区域资源转移及产业重组规律。研究发现：并购网络具有小世界性;网络节点的度数及点强度分布具有显著的幂律分布特征;并购关系呈现出明显的经济水平等级特征;经济发展水平较高的省市具有较大的中间中心度和接近中心度,它们在网络的资源转移及产业重组中,承担较重要的中介作用但其独立性较弱;各省市在网络中呈现明显的“中心———边缘”结构。最后从跨区域并购、相关产业政策及法律法规的制定方面,提出了相关的政策建议。     

制造业供应链结构拓扑优化研究

供应阶段的供应链结构问题实质是产品零部件外包的数量问题.将0-1规划原理运用到零部件自制与外包的决策过程中,能较好解决多个零部件自制与外包的选择问题.建立0-1规划模型,通过模型求解,在达到总成本最低的目的下,得到最优外包零部件的数量.     

Cournot–Nash equilibria in continuum games with non-ordered preferences

In the usual framework of continuum games with externalities, we substantially generalize Cournot–Nash existence results [Balder, A unifying approach to existence of Nash equilibria, Int. J.Game Theory 24 (1995) 79–94; On the existence of Cournot–Nash equilibria in continuum games, J. Math. Econ. 32 (1999) 207–223; A unifying pair of Cournot–Nash equilibrium existence results, J. Econ. Theory 102 (2002) 437–470] to games with possibly non-ordered preferences, providing a continuum analogue of the seminal existence results by Mas-Colell [An equilibrium existence theorem without complete or transitive preferences, J. Math. Econ. 1 (1974) 237–246], Gale and Mas-Colell [An equilibrium existence theorem for a general model without ordered preferences, J. Math. Econ. 2 (1975) 9–15], Shafer and Sonnenschein [Equilibrium in abstract economies without ordered preferences, J. Math. Econ. 2 (1975) 345–348], Borglin and Keiding [Existence of equilibrium actions and of equilibrium: a note on the “new” existence theorems, J. Math. Econ. 3 (1976) 313–316] and Yannelis and Prabhakar [Existence of maximal elements and equilibria in linear topological spaces, J. Math. Econ. 12 (1983) 233–245].