Uncertain construction and optimization of reverse logistics system 并列题名:Uncertain construction and optimization of reverse logistics system Evolvement mechanism and layout optimization of regional logistics system 并列题名:Evolvement mechanism and layout optimization of regional logistics system Research on construction and system optimization of natural gas reserve system in China Flexibility evaluation and optimization for new power system Operation coordination and optimization of urban multimodal public transit system Alyzation and optimization of microbrewery system 并列题名:Construction and operation mechanism of rural shared logistics network system 并列题名:Research on construction and system optimization of natural gas reserve system in China