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工期(T)、质量(Q)和成本(C)是项目建设中,决策者最为关注的三个目标,它们在不同的工程项目中表现出不同的决策要求。本文研究了T、Q、C三者发生不同变化时的决策情形,并给出了相应的决策优化思路和方法,为项目决策人提供了一定的决策参考依据。 相似文献
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崔毅 《数量经济技术经济研究》2001,18(12):112-114
本文假设项目投资决策已经回答了如下三个问题(1)市场空间、市场成长性及自身把握市场机会的能力;(2)合理可信的收益预测;(3)各类风险的量化及风险控制措施.在此基础上,阐述了事先评估和事后检验项目投资正确与否的四个必要性原则及其量化计算指标.最后针对企业项目投资决策如何才能做到科学化、数量化、模型化给出一个决策流程图. 相似文献
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政府投资管理中存在的主要问题 (一)投资项目决策活动中存在的主要问题 1.在项目立项和可研报告决策问题上,一是投资项目未批先建的情况较普遍.二是项目往往先由政府决定上马,再由项目审批部门履行审批程序,进行立项或可研审批.三是在可研报告决策程序中没有强制实行专家评审论证制度. 相似文献
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《中国高新技术企业评价》2016,(27)
对于不同材质的轴(材质系数F)、不同的弯曲度(T)、不同的直径(D)以及不同的弯曲点所在截面中心到弯轴端面中心的距离(L),需要在J点加热后,C点的T2(加热J点后,C点的位移)值均不一样。文章对中型电机转轴热校直工艺进行了研究。 相似文献
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国外项目评价理论研究综述 总被引:3,自引:0,他引:3
一、国外项目决策评价范围的研究现状 国外项目决策评价范围的发展,大致经历了三个阶段: (一)投资项目的财务评价阶段.20世纪50年代以前,微观效益分析时期.投资项目评价等同于项目财务可行性评价,实行的是投资项目财务评估:分析项目在财务上的获利能力和偿债能力,其特点是寻求投资项目带来最大的企业利润.在盈利能力分析上,从最初使用投资回收期和简单投资利润率等静态分析指标发展为采用财务净现值和内部收益率等动态指标作为项目取合的判断依据,这一阶段的项目评价是分指标单列的逐项评价. 相似文献
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高强度钢和耐候钢,因为它们都具备的强烈、高韧度和良好耐久在工程上被广泛应用,同时与异种钢材焊接还可以实现各种材质的特性优势,满足不同的使用需求。本论文中选择了MAG焊方法,选择在带钝边的单面V型斜坡处,对使用ER91T1-G及XY-ER80QNH的二种焊丝分别设定了四队工艺参数,并获得了多组Q960E/Q690qENH的异种钢焊头。本论文的研究能够为发展Q960E/Q690qENH等异种钢的焊接技术提供实验基础。 相似文献
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Theresa M. Welbourne 《人力资源管理》2009,48(3):339-340
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Patricia Werhane 《Employee Responsibilities and Rights Journal》1990,3(2):87-90
Workfare programs are state-instituted programs that require able-bodied persons with children of school age who wish to claim welfare payments to participate in job training programs, and, eventually, to enter the work force. The philosophy of workfare is based on the value of work and the goal of self-determination. However, as a mandatory program for welfare recipients, workfare requires of those recipients certain duties which, according to those who challenge workfare, interfere with the freedom to choose what one will do with one's life. Whether some form of workfare will be adopted as part of our national welfare system remains to be seen. What the debate about such a program suggests is that welfare, in itself, by ignoring the necessity of security and education for full human agency, neither satisfies basic needs nor prepares its recipients for any life other than that of dependency. With all its difficulties workfare nevertheless presents an alternative to welfare that, at least in theory, more closely identifies its purpose with the values of our society. 相似文献
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In this paper we argue that the impact of external scale economies and diseconomies on city size is not nearly as clear-cut as it is tacitly believed in urban economics. Similarly, city-size distortions are not caused by externalities alone. Indivisibility and nonreplicability, which prevent establishing the “right” number of cities, may represent a source for city-size distortions which can be stronger than the standard resource misallocation resulting from external scale economies and diseconomies. It follows that a direct population dispersion policy is not just an inferior substitute to Pigouvian taxes and subsidies but rather a useful complement. 相似文献
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Summary This note is an attempt to avoid doing the same search for the third time. It happened twice in my life that I wished to prove that the median is located between mean and mode for certain B -distributions: first in 1953, next in 1976. For arbitrary distributions the result is sometimes referred to as F echner's theorem. Of course it does not hold in general. In order to prove the result for particular distributions one can often use an elegant theorem of T imerding . There is a nice relationship with the standardized third central moment. 相似文献