htts:/,1658,g*E ( Digital Twin,AI,hysical entities,Services,conn,etweeo,Digital twin,CN PV. connection between physical entities and virtual models,Virtual mode,JCheng, H Zhang, Feiet al. DT-II: Digital twin enhanced Industrial Internet reference framework towards smart manufacturingI. Robotics and Computer-Integrated Manufacturing, 2020, 62: 1018S1,CfJ t/t tg(manually operated machine tool,NIOIvIT)9t/I&Q?JJPI1oQA%tt&?s?Y,4,k,“,g?.-)/I.?( human-cyber-physical,systems,HCPS ),B#?“,k( human )TO )/I