物流中心仓库货位优化系统的研究

介绍了什么是货位优化,阐述货位优化技术是如何提高物流中心的操作效率及应用货位优化系统所带来的实际意义,比较了当今国外物流公司已推出的各种货位优化系统之间的区别,提出了开发该系统的基本思路。     

一种基于经验与模型的选址优化方法

分析了传统选址问题中存在的问题，结合现实生活中的两则典型事例，提出基于经验简化选址问题的工作思路，用模型化的方法对简化后的选址问题进行优化决策，形成满意的选址方案。     

物流中心仓库货位优化系统的设计研究

以上海医药物流中心仓库为研究对象，为其仓库货位优化系统建立一个有效的多目标优化数学模型。并引入“类聚”的方法来解决同一产品族的货物临近放置的问题。最后，应用多目标遗传算法进行货位优化。     

“Itô's Lemma” and the Bellman Equation for Poisson Processes: An Applied View

Using the Hamilton-Jacobi-Bellman equation, we derive both a Keynes-Ramsey rule and a closed form solution for an optimal consumption-investment problem with labor income. The utility function is unbounded and uncertainty stems from a Poisson process. Our results can be derived because of the proofs presented in the accompanying paper by Sennewald (2006). Additional examples are given which highlight the correct use of the Hamilton-Jacobi-Bellman equation and the change-of-variables formula (sometimes referred to as ``Itô's Lemma'') under Poisson uncertainty.     

The British low-wage sector and the employment prospects of the unemployed

Are low wages a way for the unemployed to switch to higher-paying jobs? Using data from the British Household Panel Survey, the labour market dynamics of unemployed, low-paid and higher-paid employed men are analysed. Moreover, the respective (un)employment duration and occupational skill level are accounted for. Results show that in general low wages significantly reduce the risk of future unemployment and increase the chances of ascending the salary ladder, especially in the case of long-term unemployment (>360 days). Furthermore, the occupational skill level has a substantial influence on the upward mobility of low-paid jobs: individuals working in the initial period in a low-paid and higher-skilled occupation have on average an 11 percentage points higher probability of entering higher pay compared to when working in a low-paid and low-skilled occupation.     

试析我国绿色物流发展中存在的问题及对策

物流业虽然能促进经济的发展，但是物流业的发展同时也给城市环境带来一些负面的影响，如运输工具的噪声、污染气体排放、交通阻塞，以及生产和生活中的废弃物的不当处理所造成的对环境的影响，致使环境恶化的程度不断加深。为此，21世纪对物流业发展提出了新的要求，即绿色物流。目前，绿色物流在我国刚刚兴起，人们对它的认识还非常有限，在体制政策、基础设施等许多方面还存在一定的问题。本文分析了我国绿色物流发展中存在的一些问题，并提出了相应的对策。     

Monotonicity of Rank Statistics in some Non–parametric: Testing Problems

For some non–parametric testing problems (one–sided two–sample problem, k –sample trend problem, testing independence against positive dependence) a partial ordering, denoted by ≥, over the alternatives is defined. This partial ordering expresses the strength of the deviation from the null–hypothesis. All familiar rank tests turn out to become more powerful under "increasing" alternatives; that is, all familiar rank statistics preserve the ordering stochastically in samples whenever it is present between underlying distributions. As a tool, the sample equivalence of ≥ is introduced as a partial ordering over pairs of permutations. Functions, defined on pairs of permutations, which preserve this ordering are studied.     

生态园林城市规划理论研究

分析了生态园林城市的概念及提出背景;对园林城市、生态园林城市、生态城市建设理论模式进行了辨析;探讨了生态园林城市规划理念,即整体协调发展理念、综合要素统筹理念、有限目标理念、城市开敞空间管制理念、科学指标体系理念;指出生态园林城市实现生态化的主导途径为城市结构生态化和城市功能生态化;提倡在继承、发展和保护的基础上规划生态园林城市的主体--生态园林绿地系统.     

长江大学主校区建设选址研究

运用模糊优选理论对长江大学主校区的两套选址建设方案进行比选择优，弥补了定性分析比较方案时难以取舍、公认度差的不足，方法简便实用，评价结果客观。     

精益-敏捷型供应链

首先介绍一种基于产品的供应链分类方法,并从产品出发,归纳适合不同产品的供应链类型。从比较精益与敏捷两种供应链战略出发,集合两者优点,引入精益-敏捷型供应链,并利用图示表明供应链再造的方向与战略,并以本田某海外制造企业为例进行说明;最后指出其适用范围及局限性。