设备役龄 meaning in Chinese
serviceage of facilities
Examples
- In this paper i calculate the reasonable possession quantity of port handling machineries with chance - constrained linear programming . first in the paper is the background and meaning of this research ; then analysis present situation of port machinery management both in practice and theory ; in chapter 3 , i qualitatively discusses characters influencing machinery quantity , which include lifting ton , intact rate and using rate , age of machinery , machinery purchase and working cost and so on . in chapter 4 , i take the influencing characters to mathematic model of chance - constrained linear programming , aiming to maintain the need of production and reduce machinery cost
文章首先介绍了选题的背景、意义以及主要工作;第2章介绍了港口机械管理在港口企业管理中的地位与作用,以及我国港口机械设备管理与配置现状,并简要介绍目前港机合理拥有量的理论研究方法;第3章从技术与经济角度定性分析了各种因素对港机拥有量的影响,其中主要包括机械起运量、完好率与利用率、机械设备役龄、购置与营运成本等;第4章将各种影响因素引入模犁,提出以完成生产任务、机械成本最低为目标,应用随机线性规划模型计算港口流动机械合理拥有量的方法;第5章以大连港大港区为例对模型进行应用,选择四种型号叉车为研究对象,对其历史经济与技术数据进行统计分析,其中重点对随机变量单位台时维修费用进行了正态分布拟合。