再制造方式下引擎保证成本最小化研究

针对如何优化汽车引擎产品的保证成本这一问题,利用成本动因理论,分析并建立了引擎产品保证成本动因体系,该成本动因体系不仅包括了传统的保证成本,还考虑了失效产品再次失效的潜在成本。接着,利用数学规划方法,建立了引擎产品保证成本模型,并利用Matlab进行了数值分析。研究结论可用于指导汽车引擎制造企业在再制造方式下优化引擎产品保证成本。     

The linear combination,product and ratio of Laplace random variables

The distributions of linear combinations, products and ratios of random variables arise in many areas of engineering. In this paper, the exact distributions of the linear combination α X+β Y, the product |X Y| and the ratio |X/Y| are derived when X and Y are independent Laplace random variables. The Laplace distribution, being the oldest model for continuous data, has been one of the most popular models for measurement errors in engineering.     

Concurrent consideration of product design,process planning and production planning activities

In manufacturing engineering, product design, process planning and production planning activities are often considered independently. However, in order to effectively respond to changes in business situations, such as changes in demand forecast, product mix and technology, it is desirable to consider them concurrently. For this purpose, a large-scale linear programming model has been developed. The model considers minimization of the sum of processing cost, late shipment cost and inventory holding cost as the objective, and concurrently selects product designs, and generates process plans and production plans. The number of columns in the formulation can be large and, hence, an efficient column generation scheme is developed to solve the model. The model and solution procedure are illustrated with examples.     

汉源县城迁复建项目管理的启示

汉源县城建设项目是移民迁复建项目,在迁建过程中存在规划调整、设计成果不衔接、擅自提高设计标准、实施与规划不一致、实施组织混乱、施工质量低劣等问题,其原因是主要领导的频繁更替使安置思路的连续性受到影响,缺乏有效的设计协调和项目管理计划,前期选择的施工队伍能力低下,监理机构工作不力等.基于上述情况,提出采用设计总承包协调各设计单位工作、提高设计质量,加强项目前期策划工作,制定切实可行的项目管理计划和实施组织计划,促进施工管理的科学化、规范化,实行施工总承包模式,简化地方政府管理难度,保证施工质量的建议.这些建议对于移民迁建中的重大项目具有普遍的借鉴意义.     

多圈层——中心辐射式选题策划模式

目前选题策划在我国出版界处于起步和尝试阶段,受到出版界的高度重视.本文在对比分析若干策划模式利弊的基础上,提出一种"多圈层-中心辐射式"的选题策划模式.该模式是指建立以社长、总编为核心、以编辑室主任和发行部门负责人为骨干、以广大编辑为补充的三层策划网络系统.该模式强调全编辑职能扩展,能够调动各层面人员的积极性,形成选题策划合力,避免或减少人员之间的感情隔阂和选题策划的盲目性.     

Supplier involvement in product development in the electronics industry: A case study

The movement of activities earlier in the product development process requires a re-examination of the total supply network. The objective of this paper is to determine the degree of early supplier involvement (ESI) that exists between a multinational electronics company and its key suppliers, in terms of depth of integration, information exchange and buyer–supplier relationships. The paper provides insights into the strategic factors that affect the dynamics of the ESI process. The research indicates that there are considerable impediments for those participants responsible for establishing and managing the implementation of ESI. A number of strategic insights are identified that explain the existence of the impediments to the ESI process. Finally, based upon the findings a number of lessons are highlighted for organisations considering the adoption of the ESI process.     

和谐发展教学理念下体育实践课教案的设计

:通过对1958年以来有代表性的40份体育实践课教案的分析,发现几十年以来教案的格式、结构、教学方案设计基本不变,针对这种现象,提出了应重视开发"教案资源",把单一化、公式化、封闭性的教案设计向多样化、个性化、智力化的教案设计转变,以高效利用"教案资源"。     

试论孔子"为政先礼"的治国方略

孔子生活时代 ,“礼”的政治含义和思想内涵是“礼制”、“礼仪”、“礼治”、“礼俗”。孔子建立“礼”治社会的主张和措施是“礼以教人”、当权者率先“好礼”、“克己复礼”。孔子对“礼制”的创新和改革表现为“损益”西周以来的礼制 ,扩大“礼治”的社会基础 ,向传统的“礼教”提出挑战     

张学良主政东北时的反日行动

张学良主政东北期间,国难家仇系于一身,反日思想极为浓烈,先后在东北推行了一系列反日政策,并付诸实施。如摆脱日本羁绊毅然“易帜”;推行“Q型计划”包围满铁;实施反日教育等等。     

Screening procedures using quadratic forms

In quality control, a performance variable having a two-sided specification limit is common for assessing lot quality. Sometimes it is difficult or impossible to measure the performance variable directly; for example, when testing is destructive, expensive, or when the performance variable is related to the lifetime of the product. However, it may happen that there are several concomitant variables which are easily measured and which correlate highly with the variable of interest. Thus, one may use measurements on these variables to select or screen product which will have a high conditional probability of meeting product specification. We consider this situation when all variables have a joint multivariate normal distribution and the specification limits on the performance variable are two-sided.