Optimal Policies for Perishable Products When Transportation to Export Market Is Disrupted

We consider a problem where a firm produces a variety of fresh products to supply two markets: an export market and a local market. A public transportation service is utilized to deliver the products to the export market, which is cheap, but its schedule is often disrupted severely. Each time this happens, the firm faces the following questions. (i) For a product that has been finished and is waiting for delivery to the export market, should it continue to wait, at an increasing risk of decay, and when should the waiting be terminated and the product be put to the local market? (ii) For a product that has not been finished, should its processing be postponed, so as to reduce the loss from decay after its completion? (iii) What is the best sequence to process the remaining products, according to the information available? We develop, in this study, a model to address these and other related questions. We find optimal policies that minimize the total expected loss in both the make‐to‐order and make‐to‐stock production systems, respectively. For each finished product, we reveal relationships among the desirable waiting time, the price at the local market, and the decaying cost. For unfinished products, we find the optimal start times and processing sequence. Numerical experiments are also conducted to evaluate the optimal policies.     

论财务数据的远程传送

通过对现有财务数据报送方法的分析,提出了在互联网环境中通过电子邮件进行数据传送的观点,并结合MAPI控件,阐明了在VFP环境下对财务数据进行远程传送的方法。     

论无单放货的法律性质

无单放货应承担法律责任这是毋庸质疑的 ,但到底应承担何种责任 ,司法实践和学理界都存在较大的争议 ,综合目前学说界的几种观点 ,我们对提单的功能及无单放货应负的法律责任加以分析 ,这对司法实践将起到积极作用。     

汽车化油器腔体内流动实验研究及变分有限元解

本文对具有双重喉管的双腔201 A3化油器腔体内流动进行了研究,首先用变分有限无法对腔内流动进行计算,给出了不同工况下阀门全开时化油器主油系的供油特性(包括沿程真空度分布曲线、化油器大喉管、小喉管边缘的真空度随进气流量的变化曲线)。然后对模型进行实验分析,与计算相比较,两者结果吻合较好。通过二元流与一元流计算的比较,揭示了有限元计算有助于化油器的节油和改善其气动性能。     

当代广告形象与受众心理研究

在市场经济占主导地位的社会中,商品已经不仅仅是商品,而是成为了某种形象的象征,当你买进一个商品的时候,也就意味着你买进了一种观念、一种形象。在商品消费时代,受众侧重的是经济成本,而在形象消费时代,人们的消费心理则从侧重经济成本转向侧重心理成本。本文试图通过对比、分析大陆、香港、台湾三地的广告形象与受众心理接受状况,找出它们之间的差异而在这一点上又有殊途同归的例证。     

发展我国第三方物流配送的对策思考

分析了第三方物流配送的实质及其快速发展的动因,指出第三方物流配送在中国的市场前景及存在的主要问题。从物流配送新概念、现代物流特征和发展方向、整合社会存量资源和物流供应链资源、审视物流配送战略等方面对完善我国第三方物流配送手段进行了探讨。     

浅析全面建设小康社会中的利益关系调整

全面建设小康社会,最根本的是坚持以经济建设为中心,不断解放和发展社会生产力,但利益关系的调整也是关系到小康社会建设是否全面的重要环节。利益关系调整应立足于我国还处于社会主义初级阶段的实际,坚持十六大确立的基本原则,从深化收入分配制度改革、完善社会保障制度、保护弱势群体等几个方面入手。     

提前交货的经济分析

提前交货的经济分析是质量经济分析的一个重要内容。文中分别讨论了企业在生产能力过剩和生产能力不足两种状态下，通过加班或加快生产速度两种方式来满足用户提前交货的要求时，企业利润变动的分析思路和方法，给出了能够保证提前交货时企业利润不下降的产品售价的确定方法。     

Travelers' Day-to-Day Route Choice Behavior with Real-Time Information in a Congested Risky Network

Nonrecurring disruptions to traffic systems caused by incidents or adverse conditions can result in uncertain travel times. Real-time information allows travelers to adapt to actual traffic conditions. In a behavior experiment, subjects completed 120 “days” of repeated route choices in a hypothetical, competitive network submitted to random capacity reductions. One scenario provided subjects with real-time information regarding a probable incident and the other did not. A reinforcement learning model with two scale factors, a discounting rate of previous experience and a constant term, is estimated by minimizing the deviation between predicted and observed daily flows. The estimation combines brute force enumeration and a subsequent stochastic approximation method. The prediction over 120 runs has a root mean square error of 1.05 per day per route and a bias of 0.14 per route.     

第三方物流参与限时蔬菜配送问题研究

根据我国第三方物流的发展现状,结合蔬菜运输企业的实际运营情况,建立一种有第三方物流企业参与的限时蔬菜配送模型。考虑配送成本及蔬菜配送的特殊性,对比有第三方物流企业参与的统一蔬菜配送与现阶段蔬菜配送的形式,采用RSG—GA混合算法对建立的模型进行求解。通过对比运算结果和运输时间的稳定性,分析第三方物流参与蔬菜配送问题的价值所在,探讨第三方物流在蔬菜配送问题中的影响及意义。