一类供应商逆向选择问题的报酬机制研究

研究了采购企业在缺乏供应商实际业务能力、服务成本等方面信息的情况下 ,利用博弈论显示原理设计不同的供货合同来让供应商选择 ,从而根据供应商的选择结果来判断其真实的能力或类型 ,从而避免了供应商逆向选择问题的发生 .通过分析 ,得出了最优报酬机制的特征 ,并证明了上述报酬机制下的最优合同与采购企业对供应商综合能力和成本的先验认识无关 .     

寡占市场中动态古诺模型的建立及稳定性分析

建立了不同市场反需求函数及厂商不同生产成本下的一种简单的动态古诺模型 ,并在对该模型进行稳定性分析的基础上 ,引入了期望产量的概念 ,对模型进行了修正 .动态仿真结果表明修改后的动态模型更加接近现实的经济运行规律 ,对厂商产量决策的制定具有积极的指导作用 .     

LOGISTICS SCHEDULING： ANALYSIS OFTWO-STAGE PROBLEMS

This paper studies the coordination effects between stages for scheduling problems where decision-making is a two-stage process. Two stages are considered as one system. The system can be a supply chain that links two stages, one stage representing a manufacturer; and the other, a distributor It also can represent a single manufacturer, while each stage represents a different department responsible for a part of operations. A problem that jointly considers both stages in order to achieve ideal overall system performance is defined as a system problem. In practice, at times, it might not be feasible for the two stages to make coordinated decisions due to (i) the lack of channels that allow decision makers at the two stages to cooperate, and/or (ii) the optimal solution to the system problem is too difficult (or costly) to achieve.Two practical approaches are applied to solve a variant of two-stage logistic scheduling problems. The Forward Approach is defined as a solution procedure by which the first sta     

自级联式感应电动机控制系统的研制

描述了自级联式感应电动机的数学模型及其控制系统的结构,研制成功该类电机矢量控制系统样机.根据实验结果,分析了其动态和静态品质,得出此种类型电机控制系统完全可以达到与直流电动机控制系统相同性能的结论,提出了自级联式感应电动机进一步的应用前景.     

滑动支座竖向动反力对桥梁结构动力性能的影响

针对滑动摩擦支座的特点建立了可以考虑支座向动反力对摩擦力影响的双向滑动支座模型，应用所建立的支座模型，通过算例对竖向动反力对支座滑动性能的影响进行了探讨，结果表明，竖向动反力对于桥梁结构地震反应有较大的影响，应在计算中考虑。     

系统仿真动态数学模型的算法研究

研究了系统仿真中具有代表性的既可描述微分环节又可描述惯性环节的动态数学模型的计算方法，通过理论分析，给出了隐式欧拉法和梯形法的误差计算公式、误差符号及首次误差关系判断准则，找到影响计算精度的动态因子，给出动态因子的计算公式及计算方法，从而提高了此类模型的计算精度。     

M-M型纳米颗粒膜的巨磁电阻效应

探讨了M-M型纳米颗粒膜巨磁电阻效应的物理机制，指出了影响颗粒膜巨磁电阻效应的因素，推导出M-M型纳米颗粒膜巨磁电阻效应的计算公式。     

Dynamic Characteristics of Inter-Satellite Links in LEO Networks

To establish an efficient inter-satellite link (ISL) in an LEO network, the effect of geometric characteristics of ISL on the ISLs and the devices on the LEO satellite should be examined. Because of the continuous movement of the LEO satellite, the time-varying behaviours of the ISL's geometric charactersistics continuously change with the changes of the satellite's position on the orbit. These dynamic geometric characteristics of the ISLs are important for ISL's performance analyzing and the design of the devices on the LEO satellite. This paper describes dynamic geometric characteristics of ISL, analyzes the impact of these regulations on the tracking system of the satellite's antenna and the power adjusting system of the satellite's transmitter, with the Iridium system as an example.     

上市公司财务状况的动态多指标综合评价方法

针对上市公司财务状况的动态多指标综合评价问题 ,首先建立了评价指标体系 ,并在此基础上 ,综合考虑评价指标的好坏程度和增长程度两种情况 ,提出了一种适用于动态多指标综合评价的理想矩阵法 ,最后给出了一个实际应用算例.     

D－胺基半乳糖（D－galactosamine）对小白鼠肝脏的损害作用

给小鼠一次性腹注Ｄ－胺基半乳糖（Ｄ－Ｇａｌｎ）６００和１２００ｍｇ／ｋｇ，或１６小时内连续６次腹注３００ｍｇ／ｋｇ，停药后４８小时，血清谷丙转氨酶（ＳＧＰＴ）明显升高，局部肝细胞呈现肝炎病理形态改变。病变机理是过量Ｄ－Ｇａｌｎ入肝代替了尿苷二磷酸葡萄糖的代谢途径所引起的。