optimization set最优对集optimizationn.优化；最佳化Optimization of MCU Keyboard Circuit单片机键盘电路的优化optimization of water supply network给水管网优化optimization of maintenance schedule检修计划优化optimization ofobservation frequency观测频率优化optimization of refrigeration system制冷系统优化optimization of rain-gauge network站网优化optimization of characteristic space特征空间优化Optimization of Resources Allocation资源优化配置Optimization of processing technique工艺优化optimization of maintenance interval检修周期优化