我国农产品流通体系建设的现状、问题和新思路

当前，农业进一步发展的主要矛盾已经从生产领域转向市场流通领域：国内农产品市场面临进一步开放的严峻挑战，农户小生产与流通大市场的矛盾将更加突出。在此背景下，本文分析了我国农产品流通体系的基本现状和存在的主要问题，并在此基础上提出了建设我国农产品流通体系的新思路。     

On exact D-optimal designs with 2 two-level factors and n autocorrelated observations

In this paper we consider the exact D-optimal designs for estimation of the unknown parameters in the two factors, each at only two-level, main effects model with autocorrelated errors. The vector of the n random errors in the observed responses is assumed to follow a first-order autoregressive model (AR(1)). The exact D-optimal designs seek the optimal combinations of the design levels as well as the optimal run orders, so that the determinant of the information matrix of BLUEs for the unknown parameters is maximized. Bora-Senta and Moyssiadis (1999) gave some conjectures about the exact D-optimal designs based on their experience of several exhaustive searches. In this paper their conjectures are partially proved to be true.Received: January 2003 / Accepted: October 2003Partially supported by the National Science Council of Taiwan, R.O.C. under grant NSC 91-2115-M-008-013.Supported in part by the National Science Council of Taiwan, R.O.C. under grant NSC 89-2118-M-110-003.     

Estimation methods for stochastic volatility models: a survey

Abstract.  Although stochastic volatility (SV) models have an intuitive appeal, their empirical application has been limited mainly due to difficulties involved in their estimation. The main problem is that the likelihood function is hard to evaluate. However, recently, several new estimation methods have been introduced and the literature on SV models has grown substantially. In this article, we review this literature. We describe the main estimators of the parameters and the underlying volatilities focusing on their advantages and limitations both from the theoretical and empirical point of view. We complete the survey with an application of the most important procedures to the S&P 500 stock price index.     

用EVA指标优化供应链战略管理

本文从资金成本概念着手剖析了经济增加值(EVA)的含义;并从供应链战略的三个环节:采购、内部资源整合、需求传递方面介绍了如何在供应链战略中实现EVA管理。详述了在采购战略中如何用EVA值决定对某种原材料是自产还是外购;在内部资源整合战略中如何根据EVA思想实施数量化管理;在需求传递战略中通过降低顾客成本,提高客户服务水平来增加企业的EVA值,从而提高整个供应链的竞争力。     

基于循环经济的企业生产价值链分析

循环经济是一种新的经济发展模式,发展循环生产是实现企业可持续发展的根本途径。本文介绍了循环经济的概念及基本原则,指出了价值链分析的要点,提出了建立企业循环生产的基本模式。     

现代西方饭店组织的发展演进

我国民族饭店集团发展十分缓慢的一个重要原因是没有重视饭店集团的理论基础研究．因此，有必要重点考察现代西方饭店组织发展的历史轨迹，分析各类饭店组织的主要特点，探讨其演进过程，以加强国内学术界对这一问题的研究．     

敏捷供应链的战略研究

首先从传统供应链发展状况入手,指出其存在的问题,进而提出了敏捷供应链;通过对敏捷供应链的特点分析,以及战略匹配理论的引进,论证了敏捷供应链的战略优势,为供应链的发展方向提供了依据。     

浅谈供应链物流管理

供应链管理是跨企业的物流管理，是在整个供应链上应用系统观念进行集成化或一体化的管理。进入21世纪，在全球经济一体化趋势中，更体现出供应链物流管理的重要性。     

供应链中知识共享框架的研究

本文论述了供应链中知识管理以及知识共享,在此基础上提出了供应链中知识共享的系统框架,并详细介绍了其中供应链信息系统,企业集成知识门户,知识库的建立等几个问题,文章最后分析了供应链中进行知识共享应遵循的策略.     

通用装备实施供应链管理过程中供应商的选择和评价研究

本文介绍通用装备实施供应链管理过程中军品供应商评价选择的实施步骤,结合具体实例介绍建立军品供应商评价指标体系,制定供应商评价标准,对军品供应商进行评价和选择的方法.