城市流通系统:研究现状与一个综合性框架

现代流通产业的发展演变过程是伴随着现代城市的产生与发展过程进行的,现代城市是现代流通产业的载体,而城市则因为流通产业的发展而发展、壮大.因而,流通问题与城市问题是密不可分的.目前城市流通问题的研究集中在商业地理学领域,而传统流通理论则游离于该领域之外,这种游离造成了该领域研究的一些问题.本文在比较全面地回顾和评述了国内外学者对城市流通问题研究现状的基础上提出了一个综合性的研究框架,以期为城市流通问题的研究提供新的视角.     

浅析契约协调下的供应链利润分配方法

利润分配是供应链管理中的一个重要问题。文章通过分析协约协调条件下的供应链特点,总结契约协调下的供应链利润分配的思路和坚持的原则,最后概括了契约协调下供应链利润分配的简单模型。以期给供应链的合作企业提供合理利润分配方法的建议。     

基于禁忌搜索的物流配送中心选址方法研究

物流配送中心选址问题在物流网络规划中占有非常重要的地位,选址的合理与否直接关系到配送中心未来的发展。针对企业选址的一般要求,以配送中心总成本最小为目标,构造了一种物流配送中心选址模型。该模型较接近现实情况,同时,给出了求解该模型的禁忌搜索算法和简单算例。     

新零售下社区生鲜配送模式的综合评价

新零售模式下社区生鲜“最后500m”的冲刺已成为生鲜农产品快速配送的关键问题。基于目前已有的配送模式:“社区+便利店”模式、第三方配送以及众包模式,通过层次分析法从服务水平、配送成本、客户体验三个方面对三种配送模式进行量化分析,得出每种配送模式在各层次的权重。研究结果表明配送中降低配送成本是关键,减少货物赔损率、提高客户满意度才能实现有效率的配送。     

On a rank-order test for the equality of probability of an event

Abstract

The following situation is considered. A fixed number (= n) or sequence of independent trials T ₁ T ₂,…, T _n is given, and in each of these an event E mayor may not occur, It is further observed that the event E occurs a total of k times amongst the n trials T _i , (i = l,…, n). It is then required to test the hypothesis H ₀ that the probability of the occurrence of E is constant from trial to trial, i.e. H ₀ is the hypothesis: p ₁ = p ₂ = ? = p _n = p, if p _n (i = 1, …, n) represents the probability that E occurs on the ith trial.     

Simulating the Evolution of the Implied Distribution

Motivated by the implied stochastic volatility literature (Britten–Jones and Neuberger, forthcoming; Derman and Kani, 1997; Ledoit and Santa–Clara, 1998) this paper proposes a new and general method for constructing smile–consistent stochastic volatility models. The method is developed by recognising that option pricing and hedging can be accomplished via the simulation of the implied risk neutral distribution. We devise an algorithm for the simulation of the implied distribution, when the first two moments change over time. The algorithm can be implemented easily, and it is based on an economic interpretation of the concept of mixture of distributions. It can also be generalised to cases where more complicated forms for the mixture are assumed.     

物联网条件下物流企业配送流程的重塑

基于物联网的视角,研究了现代物流企业配送业务流程再造的问题,对目前物流企业配送业务流程的业务调度、运输监控、绩效管理和优化配载等环节,进行了基于物联网的重新设计和优化,以期打造一个信息化智能化的、与上下游物流成员实现资源共享和无缝链接的新型高效率高产出的物流配送业务体系。     

Poverty Traps, Indeterminacy, and the Wealth Distribution

We consider a one-sector growth model in continuous time with a production externality and endogenous labor supply. There is a continuum of households who have identical preferences but differ with respect to their initial wealth. We show that there exist economies such that an indeterminate steady state exists for some wealth distribution but not for others. A second result is that a redistribution of wealth may drive the economy from a steady state with strictly positive output to a poverty trap in which output converges asymptotically to zero. These results indicate that differences in the wealth distribution may be responsible for drastic differences in the long-run standard of living. Journal of Economic Literature Classification Numbers: D31, D50, O41.     

试论按劳分配与按生产要素分配

长期以来,对于分配制度原则的选择,我国经历了从单纯的按劳分配,到按劳分配为主、其他分配形式为辅,再到按劳分配与按生产要素分配相结合这样一个较长的过程。按劳分配是以马克思主义理论为依据的。社会主义初级阶段的基本经济制度决定了我们必须把按劳分配和按要素分配两种不同的分配方式结合起来。按劳分配与按生产要素分配两种分配方式的结合是我国建立社会主义市场经济体制的客观要求。     

基于GIS的配送车辆调度系统的设计与实现

本文分析了物流配送与GIS的特点和功能，简要介绍了我们所设计开发的基于CIS的配送车辆调度系统。