多元化与公司价值文献综述

行业多元化和地理多元化对公司价值具有不同的影响，即行业多元化对公司价值有负向影响，地理多元化则有利于公司价值的增加。多元化的这两个方面对公司价值有交互影响。多元化折价的原因主要有公司多元化本身造成公司价值减少；折价是由计量引起的。总结国外学有关多元化对公司价值影响的研究成果，以期对多元化领域的进一步研究提供一定的线索。     

推挽式激光导引AGV设计

介绍了推挽式激光导引无人车设计的主要技术指标，结构特点及各主要系统的功能与作用。     

论供应链管理环境下的物流管理

供应链管理是随着全球制造、全球化经营趋势的迅猛发展孕育而生的一种新的物流管理模式和思想，是物流管理的一场革命。与此同时，物流管理在此大环境下，又呈现出许多新的特点和规律。本文对此问题从供应链管理的科学内涵、供应链管理与物流管理的内在关系以及供应链管理下的物流管理三个方面进行了论述。     

Product attributes and models of multiple discreteness

Demand for product characteristics is examined within the context of models that allow for both corner and interior solutions corresponding to zero and non-zero demand. Product attribute information is associated with marginal utility and curvature (satiation) parameters of various utility functions. Empirical applications demonstrate the need for incorporating characteristics in a fairly general way. We also compare our approach to an ideal point and pure Lancasterian versions of our nonlinear utility model. The data support our model over either the ideal point or Lancasterian variants.     

The Measurement of Consumption Efficiency Considering the Discrete Choice of Consumers

In this study we propose a mathematical definition of the consumption efficiency of multi-attribute products in the price–quality space. A new model, the discrete Range Adjusted Measure (RAM) model, is suggested as an empirical tool to measure the level of consumption efficiency. We further discuss the effect of consumption efficiency on the innovation incentive. Empirical work is made for the mobile phone market. We expect that the consumption efficiency concept will contribute to the extension of the traditional framework of production efficiency analysis on the one hand and to the understanding of the nature of innovation in a technology-intensive market on the other hand.JEL Classification: C67, D11, D12, D21     

A two-stage stratified Warner’s randomized response model using optimal allocation

This paper applies Kim and Wardes (2004) stratified Warners randomized response model to Mangat and Singhs (1990) two-stage randomized response model. The proposed stratified randomized response model has an optimal allocation and a large gain in precision. Hence, the estimator based on the proposed method is more efficient than Kim and Wardes (2004) and Mangat and Singhs (1990) estimators under the conditions presented in both the case of completely truthful reporting and that of not completely truthful reporting by the respondents.     

减少集装箱码头堆场面积的策略探讨

本文论述了新形势下集装箱码头堆场的发展趋势,分析了集装箱码头堆场容量与采用不同装卸系统的关系,提出了减少集装箱码头堆场面积的相关策略。     

供应链中批发商和零售商的批发价格模型

建立了一个简化的批发价格模型,求出了批发商和零售商纳什均衡解的特征,并且就其现实意义进行了讨论。     

物流设施选址问题中时间满意度函数的定义及应用

建立了顾客对等待时间的满意度与物流设施和需求点间的距离之间的函数关系,描述了时间满意度函数的拟合方法并给出了函数的拟合原则,最后以集覆盖问题为例说明了时间满意度函数的应用。     

基于Matlab的神经网络预测模型研究

本文针对物流系统多种因素相关的非线性特点，建立了人工神经网络模型并对物流系统历史数据进行拟合，抽取和逼近负荷曲线进行物流预测。它的优点在于它具有模拟多变量而不需要对输入变量做复杂的相关假定。不要求知道输入输出变量间的函数关系，只需通过对输入输出数据的训练，获得输入输出之间的映射关系，来进行负荷预测。该预测模型在Matlab软件平台上进行了仿真，结果反映了该预测模型的有效性和实用性。