配送中心管理信息系统业务流程研究

本文通过分析物流配送中心的作业流程，探讨了配送中心管理信息系统的业务流程及各主要功能模块间的关联关系。     

配送中心管理信息系统业务流程分析研究

本文通过分析物流配送中心的作业流程；探讨了配送中心管理信息系统的业务流程及各主要功能模块间的关联关系。     

A bootstrap-assisted spectral test of white noise under unknown dependence

To test for the white noise null hypothesis, we study the Cramér-von Mises test statistic that is based on the sample spectral distribution function. Since the critical values of the test statistic are difficult to obtain, we propose a blockwise wild bootstrap procedure to approximate its asymptotic null distribution. Using a Hilbert space approach, we establish the weak convergence of the difference between the sample spectral distribution function and the true spectral distribution function, as well as the consistency of bootstrap approximation under mild assumptions. Finite sample results from a simulation study and an empirical data analysis are also reported.     

物流金融服务分销渠道问题研究

利用营销管理理论中的分销渠道原理对物流金融服务分销渠道问题进行系统研究,把握物流金融服务分销渠道的内涵、功能,分析物流金融服务分销方法,考察物流金融服务分销的传统渠道和基于现代信息技术的新兴渠道方法,以方便客户在合适的时间、合适的地点方便地购买使用物流金融产品。     

论物流新职能——流通加工

流通加工是一项重要的物流职能。它不仅是生产过程的“延续”，也是生产本身或生产工艺在流通领域的延续。流通加工是一种辅助性的生产加工，但又区别于生产加工。文章首先阐述了流通加工的定义和特点，并指出其在物流中的地位和作用。最后讨论了流通加工过程中所存在的不合理之处和解决的措施。     

Density estimation in the uniform deconvolution model

We consider the problem of estimating a probability density function based on data that are corrupted by noise from a uniform distribution. The (nonparametric) maximum likelihood estimator for the corresponding distribution function is well defined. For the density function this is not the case. We study two nonparametric estimators for this density. The first is a type of kernel density estimate based on the empirical distribution function of the observable data. The second is a kernel density estimate based on the MLE of the distribution function of the unobservable (uncorrupted) data.     

全程物流条件下物流园区信息系统规划与布局的研究

分析了现代物流系统中全程物流、物流信息、物流园区等内涵和作用,探讨了物流园区信息表征及网络容量规划分析,构建了物流园区信息系统的功能、内容,设计了系统结构和通信方案,给出了主要软件平台,最后分析了物流信息技术对物流系统规划的影响。     

基于空间信息网络的军事物流配送研究

针对我军物资保障效能低下的现状,分析了军事物流配送的概念和信息系统功能,阐述了空间信息网络及其对军事物流配送信息化建设提供的技术方法,提出军事物流配送中空间信息网络的应用所要解决的关键技术,为今后军事物流配送保障的发展提供了有效的辅助决策支持。     

Exponential deconvolution: two asymptotically equivalent estimators

Two isotonic estimators for the distribution function in a specific deconvolution model, the exponential deconvolution model, are considered. The first estimator is a least squares projection of a naive estimator for the distribution function on the set of distribution functions. The second estimator is the well known maximum likelihood estimator. The two estimators are shown to be first order asymptotically equivalent at a fixed point.     

On a test of homogeneity for samples from a negative binomial distribution

Summary An exact test is proposed for the equality of probabilities of an event in a series of independent trials, each drawn from a negative binomial distribution with a specified number of successes. The power function of this conditional test is also derived, as well as an approximate test for homogeneity.     

Optimal tests and estimators for truncated exponential families

Blackwell-Rao-Lehmann-Scheffe' theory is used to derive the minimum variance unbiased estimators for the functions of scale and truncation parameters as well as the reliability function of the truncated exponential family distribution. Uniformly most powerful unbiased tests of hypotheses are formulated. Finally, a particular model of this family, viz., the truncated exponential model is discussed.     

基于作业流程的第三方物流配送中心信息系统设计

以一般第三方物流配送中心的业务需求为基础,依据具体的物流作业流程设计业务功能模块,提出了第三方物流中心管理信息系统设计方案,旨在提高物流配送中心业务的自动化水平,管理信息化水平以及第三方配送中心的物流信息化水平     

The depth function of a population distribution

Tukey (1975) introduced the notion of halfspace depth in a data analytic context, as a multivariate analog of rank relative to a finite data set. Here we focus on the depth function of an arbitrary probability distribution on Â^p, and even of a non-probability measure. The halfspace depth of any point / in Â^p is the smallest measure of a closed halfspace that contains /. We review the properties of halfspace depth, enriched with some new results. For various measures, uniform as well as non-uniform, we derive an expression for the depth function. We also compute the Tukey median, which is the / in which the depth function attains its maximal value. Various interesting phenomena occur. For the uniform distribution on a triangle, a square or any regular polygon, the depth function has ridges that correspond to an 'inversion' of depth contours. And for a product of Cauchy distributions, the depth contours are squares. We also consider an application of the depth function to voting theory.     

基于非射线方向距离函数的快递业服务绩效评估

论文在对顺丰速运(常州)有限公司的企业数据进行调研的基础上,构建一种非射线方向距离函数的DEA模型,对顺丰速运(常州)有限公司的78个快递营业网点的服务绩效开展评估,得到了被评估营业网点服务绩效的量化效率值,以及在各个投入产出项上的改善空间。以此作为实证依据,提出快递业提升配速实效性、降低配送损坏率、改善快递业服务质量的对策建议。     

Stochastic optimal growth with bounded or unbounded utility and with bounded or unbounded shocks

This paper studies a one-sector stochastic optimal growth model with i.i.d. productivity shocks in which utility is allowed to be bounded or unbounded, the shocks are allowed to be bounded or unbounded, and the production function is not required to satisfy the Inada conditions at zero and infinity. Our main results are three-fold. First, we confirm the Euler equation as well as the existence of a continuous optimal policy function under a minimal set of assumptions. Second, we establish the existence of an invariant distribution under quite general assumptions. Third, we show that the density of optimal output converges to a unique invariant density independently of initial output under the assumption that the shock distribution has a density whose support is an interval, bounded or unbounded. In addition, we provide existence and stability results for general one-dimensional Markov processes.     

Recent and classical tests for exponentiality: a partial review with comparisons

A wide selection of classical and recent tests for exponentiality are discussed and compared. The classical procedures include the statistics of Kolmogorov-Smirnov and Cramér-von Mises, a statistic based on spacings, and a method involving the score function. Among the most recent approaches emphasized are methods based on the empirical Laplace transform and the empirical characteristic function, a method based on entropy as well as tests of the Kolmogorov-Smirnov and Cramér-von Mises type that utilize a characterization of exponentiality via the mean residual life function. We also propose a new goodness-of-fit test utilizing a novel characterization of the exponential distribution through its characteristic function. The finite-sample performance of the tests is investigated in an extensive simulation study.Received: January 2002/Revised: January 2004     

射频识别技术在军事物流配送中的应用

现代化战争空前剧烈,军事物流保障任务更加复杂,责任更加重大。目前手工作业和条形码技术已经不能满足需求。而RFID技术可以弥补这种不足。论文从RFID技术入手,结合部队实际,提出了军械物资配送中出入库的设计方案,以及实现的功能。     

Estimating structural changes in regression quantiles

This paper considers the estimation of multiple structural changes occurring at unknown dates in one or multiple conditional quantile functions. The analysis covers time series models as well as models with repeated cross-sections. We estimate the break dates and other parameters jointly by minimizing the check function over all permissible break dates. The limiting distribution of the estimator is derived and the coverage property of the resulting confidence interval is assessed via simulations. A procedure to determine the number of breaks is also discussed. Empirical applications to the quarterly US real GDP growth rate and the underage drunk driving data suggest that the method can deliver more informative results than the analysis of the conditional mean function alone.     

银川市湿地现状与保护

湿地不仅是生物多样性的载体,具有重要的环境调节功能,在抵御洪涝、改变径流时空分布、涵养水源、保持水土、降解污染等方面具有其它系统不可替代的作用,其本身还具有很高的美学价值,尤其是城市中的湿地,对城市生态环境维系以及为人们提供游憩场所等方面更具有重要作用。但城市的不断拓展,造成了湿地面积缩小,使其失去了生态功能,制约着城市的健康发展。     

Distributional aspects of public rental housing and rent control policies in Spain

This paper studies the importance of the economic advantages and some distributional consequences generated by public and subsidized rental housing as well as rent control policies in Spain. Individual benefits are defined as the difference between the rent the protected dwellings would have in the market, minus the rent actually paid for them. The market valuation is obtained with an hedonic function estimated for the uncontrolled private sector. Data for the Madrid Metropolitan Area in 1974 show that for both policies, benefits are of considerable importance, while its distribution among beneficiaries is very unsatisfactory according to horizontal and vertical equity criteria.