The decision support model for bridge component maintenance is developed on the basis of comparison of the annual average maintenance cost of bridge component among all selected maintenance schemes.
桥梁构件维护决策支持模型是基于计算桥梁构件在各可选维护方案下其状态周期内的年均维护成本的基础上建立的。
The certainty model of the risk of tender for engineering construction, bid cost comparison and tender probability on uncertainty measure is established.
给出了未确知测度、置信度的概念，建立了基于未确知测度的工程建设投标风险，报价成本比，中标概率确定模型。
The control project that medium heating furnace system under the control of PLC is possible, then we have making a comparison cost performance between several model of PLC.
用PLC实现热媒炉系统的控制是一种可行方案，通过这种方案看几种型号PLC的性能价格比。
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