设备维修备件采购模型

根据维修备件采购的要求和特点,在对维修备件进行分类的基础上,提出了适用于维修备件采购的两种模型,专用备件以经济订购批量为基础的采购模型、通用备件以重要度为比例系数的采购模型．并通过算例分析说明提供的模型或方法具有一定的通用性和指导作用。     

城市道路交通与大气污染及相应的解决措施研究

文中建立模型阐述了城市道路交通与大气污染之间的关系。从材料技术角度、规划建设角度和管理角度分析城市道路交通造成大气污染的原因。并据此提出了四类解决措施,即,技术层面的解决措施——减少尾气排放、交通规划层面的解决措施——优化交通结构,降低小汽车的使用率、交通控制层面的解决措施——实现交通分流,减少城市拥堵和法治道德层面的解决措施——提高人们的环保意识。以实现城市道路交通与环境协调发展的目标。     

An applied stochastic model of the quality–quantity trade-off in the public health care sector

It is a striking feature of the many of the developing country public service sectors that the sectors in question often overproduce the quantity of services but underproduce the quality. This feature, which is exemplified in this paper, is rooted in a wide spectrum of economic and sociological factors ranging from the economic and sociological profile of the service receiving people to the asymmetric density of service-receiving population across their regions. This feature, we conjecture, is a source of a considerable degree of suboptimality in some of the developing countries. If our conjecture is correct, correcting such suboptimalities is likely to yield significant welfare improvements that could help speed up the process of development in the underdeveloped regions of the world. To analyze the supoopimalites in question, we will first develop a concept (and a model) of optimal quality in the public service sector, which indicates the level of quality that maximizes expected public satisfaction subject to available resources. Resources are used in an efficient manner to produce the service in question. The concept and the model in the paper make a needed contribution to the quality discourse by presenting a way of determining the quality improvements (or adjustments) necessary to achieve optimum in the public service sector. The paper presents an application (a case study) of this new concept in the public healthcare sector in Turkey, and explores the differences between the actual and optimal quality in the sector in question. It turns out that there is a considerable difference between the actual and optimal levels of quality (as well as those of quantity) in the Turkish public healthcare sector in an overpopulated city (Istanbul), indicating a significant overproduction of quantity and underproduction of quality. Thus, to achieve the optimal levels, the sector should increase quality and reduce quantity by a considerable margin. The quantified differences (gaps) between actual and optimal levels point out a considerable room for welfare improvement. Optimum-seeking adjustments closing these gaps could be shown to lead to considerable satisfaction and welfare gains, the measurement of which is worthy of future research.     

改善多级供应链订货量波动的传递函数分析

分析供应链中各节点企业订货的动态过程,建立各企业订货量的离散时域模型并通过Z-变换,将离散时域订货量模型转换为以需求量为输入、订货量为输出的传递函数模型,说明企业订货量随需求量变化而波动的过程.比较信息共享前后企业订货量的波动情况,了解信息共享改善供应链订货量波动的程度.     

高校教学质量工程的深层思考

本文通过对高校教学质量的分析,指出高校教学质量滞后有其深层次原因,并提出了提高教学质量的相关措施。     

Generalized confidence intervals for process capability indices in the one-way random model

The method of generalized confidence intervals is proposed as an alternative method for constructing confidence intervals for process capability indices under the one-way random model for balanced as well as unbalanced data. The generalized lower confidence limits and the coverage probabilities for three commonly used capability indices were studied via simulation, separately for balanced and unbalanced cases. Simulation results showed that the generalized confidence interval procedure is quite satisfactory both in the balanced and unbalanced cases. Examples are provided to illustrate the results.     

零售价格敏感型需求之下基于数量折扣的VMI协调

本文提出了合理的批发价格数量折扣形式,用以协调外部市场需求量为零售价格敏感型(零售价格函数和不确定因素函数之和)的供应链管理库存(VMI)。     

基于建筑工程工程量清单计价模式的报价模型研究

鉴于目前《建设工程工程量清单计价规范》实施以来，多数承包商在没有胄己的企业定额情况下，无法合理地投标报价，本文利用模糊数学和灰色理论等数学方法建立了相应的投标报价模型，以便于投标参与者和决策者快速、准确、客观地确定工程造价。     

物流需求质量--第三方物流发展的动力

市场供给和市场需求的均衡发展．是第三方物流市场健康发展的必要条件。物流市场需求包括需求数量和需求质量两个方面，中国物流市场虽已启动．却因物流有效需求不足，特别是物流需求质量的低下．而未被激活。物流需求质量的提升，将为第三方物流的发展提供动力。     

招标代理机构在工程量清单计价招标阶段的工程造价控制策略

造价控制是建设项目管理的重要内容之一。实行工程量清单计价招标对于造价控制具有深刻的影响。为加强工程量清单计价招标方式下的招标阶段的造价控制,招标代理机构应积极协助招标人在招标文件编审、招标过程管理和合同管理等方面,强化管理和创新工作;同时,建议政府管理部门应抓紧编制与工程量清单计价招标方式相适应的施工发承包合同范本。