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考虑动态性能退化的生产系统预防维护和缓存配置策略 被引量:1
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作者 郭闻雨 张秀芳 +2 位作者 修玉皎 夏唐斌 潘尔顺 《上海交通大学学报》 EI CAS CSCD 北大核心 2019年第9期1107-1114,共8页
以带缓存双机系统为研究对象,结合随机波动的加工能力指标与可靠度,动态描述设备的综合性能退化程度,并进一步研究了维护规划与缓存配置的联合优化方法.针对带缓存双机系统的生产形式和运行特征,分阶段进行缓存动态建模,基于全局构建了... 以带缓存双机系统为研究对象,结合随机波动的加工能力指标与可靠度,动态描述设备的综合性能退化程度,并进一步研究了维护规划与缓存配置的联合优化方法.针对带缓存双机系统的生产形式和运行特征,分阶段进行缓存动态建模,基于全局构建了系统的缓存和缺货成本模型,以总平均运行成本最低为目标,对系统的预防维护和缓存配置进行联合决策.通过案例分析获得最佳维护策略,论证了合理配置缓存对降低长期成本具有显著作用. 展开更多
关键词 预防维护 缓存配置 动态性能退化 总平均成本
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从经济学角度对企业信用评级用途的分析
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作者 张景亮 《经济技术协作信息》 2008年第17期12-12,共1页
本文在所有企业相互合作的条件下(这里的合作主要指的是企业之间共享彼此的对客户信用评级的结果),通过一些经济学的分析得出在.这个前提下,企业信用评价的社会总平均成本将是减少的。本文的另外一个假设:信用评级和信用交易发生... 本文在所有企业相互合作的条件下(这里的合作主要指的是企业之间共享彼此的对客户信用评级的结果),通过一些经济学的分析得出在.这个前提下,企业信用评价的社会总平均成本将是减少的。本文的另外一个假设:信用评级和信用交易发生在企业与客户之间。 展开更多
关键词 大企业 经济学 企业信用等级 社会总平均成本
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Cost estimation and control of colorectal cancer screening 被引量:2
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作者 Xinyuan Ma Qilong Li Wanli Ma 《The Chinese-German Journal of Clinical Oncology》 CAS 2012年第2期109-112,共4页
Objective:The aim of our study was to estimate the cost of colorectal cancer screening and to provide evidence for the cost control of colorectal cancer screening among general population in rural area of China.Method... Objective:The aim of our study was to estimate the cost of colorectal cancer screening and to provide evidence for the cost control of colorectal cancer screening among general population in rural area of China.Methods:We determined the net cost for colorectal cancer mass-screening in Jiashan County,and evaluated the cost-benefit and cost effectiveness.Results:The compliance rate of primary screening and intensive screening were 84.6% and 78.7%,respectively.In primary screening,the average cost for each individual was 27.2 yuan,and the average cost for identifying one high-risk individual was 180.5 yuan.The mean cost to diagnose one colorectal cancer patient was 42963.3 yuan.As for identification of adenoma,the average cost for each case was 4384.0 yuan.Based on the calculation,the average cost of reducing one colorectal cancer patient was 12768 yuan by conducting the mass-screening protocol.Conclusion:It was beneficial to do the cost-benefit analysis of colorectal cancer screening in area of high incidence.Based on the results of cost-benefit analysis,more efforts should be made to reduce the cost and to improve the efficiency of the colorectal cancer screening. 展开更多
关键词 colorectal cancer SCREENING high-risk group cost estimation cost-benefit analysis cost-effectiveness analysis
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