农资连锁经营应急机制下车辆调度研究

连锁经营,作为农资流通领域的新模式,逐步取代了原本散乱的农资零售格局。物流配送活动作为连锁经营理念的核心,是农资连锁经营能够成功运作的关键。但由于农业生产对农资产品的特殊要求,当消费者对农资产品有紧急需求,但就近的连锁店铺不能供货时,会给农业生产带来不利影响。本文引入应急概念,构建了应急车辆调度模型,来实现配送中心对企业配送系统内部各节点的库存的协调,使该连锁店能够快速响应消费者需求。     

“四阶段法”中运量分配的路网断面剖切技术研究

针对"四阶段法"的运量分配过程中存在对路网动态变化的适应性反应迟钝、相关径路双向交流产生的大量回流量重复计算、通道交流量缺乏总量控制调节关键环节等问题,提出采用路网断面动态剖切技术,给出具体操作步骤和基本算法,并与传统运量分配方法进行优劣分析。通过宝中线运量预测的实例计算分析,说明断面剖切技术的实际应用。     

ECONOMIC GROWTH AND THE QUANTITY AND DISTRIBUTION OF EDUCATION: A SURVEY

Abstract The focus of this survey is to discuss different attempts at incorporating the distributional dimension of human capital into the theoretical and empirical growth framework. We present a series of models which deviate from the direct link between the aggregate or average level of human capital and economic growth in that they introduce the distribution of education as a new element in explaining the relationship under investigation. After surveying the theoretical literature, we present recent empirical work on the relation between economic performance and the average level, as well as the distribution of education, respectively.     

Resolving Unfair Distribution of Income through Transforming the Mode of Economic Development

传统经济发展方式对收入分配领域中的许多不合理因素产生了强支撑，是我国收入分配差距日益扩大的深层原因。本文通过对“三个转变”的梳理，分析了传统经济发展方式的内在缺陷及其在居民劳动报酬、行业垄断、社会福利体系建设和通货膨胀等方面的负面影响。最后，就如何从转变经济发展方式入手缓解收入分配不公提出了针对性的意见和建议。     

中国城市群划分与空间分布研究

随着改革开放后中国经济的飞速发展,中国城市群体系不断完善.运用分形理论的基本思想,利用arcgis软件对中国城市群的空间分布定量分析发现,中国城市群的不均衡分布态势和空间轴线分布特征明显.     

基于DEA—Tobit的我国药品流通企业效率影响因素分析

针对我国药品流通业存在“多,散,小”、效率低、流通费用高的问题,当前的主流观点是提高行业集中度、退出国有股份等.本文首先通过Pastor筛选法筛选出投入变量,构建DEA模型。并计算样本企业的效率。再用Tobit模型分析影响DEA效率的因素。结果发现：（1）企业规模与综合效率、纯技术效率正相关,但与规模效率负相关,因此在提高行业集中度的同时应当注意规模效率的提高;（2）产商一体化的混业经营比专业化经营更有效率;（3）国有股份的存在有利于效率的提高,同时由于药品的特殊性,应适度保留国有股份。     

中国生态城建设的现状特征与发展态势——中国百个生态城调查分析

我国近些年生态城建设呈现出数量多、规模大、发展速度快的特征,目前全国已出现一百多个大小不等的新建生态城项目。但这些生态城是否都是真正意义上的生态城受到学者和公众的质疑,因此迫切需要全面了解当前我国生态城建设的基本情况和特点,总结其发展态势。本研究针对我国生态城市建设实践,分析其类型、分布特征、产业特征和存在的问题,以期为制定生态城市发展政策提供依据。     

Benefit Incidence of Public Recreation Areas—Have the Winners Taken Almost All?

This study presents a framework for investigating the benefit incidence of provision of public recreation opportunities. The proportion of individuals who use outdoor recreation services increases with income, and frequency of use differs by the users’ gender and life situation (e.g., depending on whether they are students or older citizens). The decomposition of distributive incidence shows that a bias in favor of high-income groups may be accentuated when the perceived value of these services is taken into account in monetary terms. We compare alternative strategies in terms of equity for improving recreation opportunities, e.g., reduced distance to or increased acreage of recreation sites. Our results indicate that although these strategies improve the welfare distribution among the income groups, a considerable proportion of benefits nevertheless accrue to high-income groups.      

How to Construct a Random Probability Measure

This article presents an overview of several constructive methods for generating random probability measures. Applications of random probability measures include Bayesian statistics, average optimal control problems, average error bounds for numerical equation solving methods, and models for random distributions of mass in space.     

统计理论在木片抽样方案中的应用

介绍了木片取样的系统抽样方案,经验抽样方案和概率抽样方案,通过分析系统取样方案中含水率、规格片、朽木和树皮等检验项目的历史统计,提出含水率,规格片和树皮都服从近似正态分布的规律,并在此基础上预设了含水率的允差。