关键词: 数字孪生, 智能制造, 十问, 新一代信息技术, 适用准则, 标准, 工具与平台

Abstract: At present,Digital twin(DT)is drawing significant attention from the academia,industry,finance,and governments.However,people from different fields have different understandings and cognitions about DT.At the same time,there are confusions about the similarities and differences among new concepts,new terms and new technologies of DT.Moreover,users and enterprises are puzzled whether DT is suitable to them.To understand and treat DT in a rational way,and further master the research status of DT in worldwide,the literatures about DT published up to December 31,2019 are summarized and analyzed statistically from various dimensions,including the time distribution,country distribution,source publication distribution,scholar distribution,research institution distribution,and high-frequency keyword distribution.On this basis,the following 10 key questions towards DT have been intensively studied.1.What is DT? 2.Who focus on DT? 3.In which country is DT more popular,China,America,or Germany? 4.What is the relationship between DT and smart manufacturing? 5.Can DT be integrated with new generation of information technologies(New IT)? 6.Are there any scientific problems with DT? 7.What are the usages of DT? 8.What is the application criterion of DT? 9.Does DT need standards? 10.Does DT need commercial tools or platforms? It is expected to provide references and guidance for researchers to further understand DT,for decision-makers to put DT in perspective,and for practitioners to better apply DT in practice.

Key words: digital twin, smart manufacturing, ten questions, New IT, application criterion, standards, tools and platforms