The allowable availability was selected as constraint, the maintenance cost was identified as optimization objective, the maintenance cycle was as optimal variable, the optimization model was set up.
以设备许用可用度为约束条件，以维修成本最低为目标，以维修周期为变量，建立设备维修优化模型。
The paper use Markov chain model to calculate the maintain level and the maintenance cycle of bogie frame.
根据论文中建立的维修方式决策模型对走行部轴箱最优维修方式进行决策；
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