Efficient State Update Exchange in a CPS Environment for Linked Databased Digital Twins This paper addresses the problem of reducing the number of messages needed to exchange state updates between the CyberPhysical System (CPS) components that integrate with the rest of the CPS through Digital Twins in order to maintain uniform communication interface and carry out their tasks correctly and safely. The main contribution is a proposed architecture and the discussion of its suitability to support correct execution of complex tasks across the CPS. A new State Event Filtering component is presented to provide eventbased communication among Digital Twins that are based on the Linked Data principles while keeping the fanout limited to ensure the scalability of the architecture.

Digital Twins for Industry 4.0 and Beyond Digital twins (DT) and cyberphysical systems (CPS) are two independently developed yet comparable supporting concepts for smart manufacturing, or xe2x80x9cIndustry 4.0xe2x80x9d in a more popular term. Both of their working principle are based on a close interaction between a physical object and its digital counterpart. Such similarity arouses our curiosity on the association between them. The purpose of this study is to highlight the associations between DT and CPS. With the help of coword analysis, we find that the two terms seldom coappear in the literature. Nevertheless, they link to a similar set of enablingtechnology terms although with different weighting on these terms, implying that they are established on a similar set of technologies. We suggest that topics within a field being developed independent of each other in the early stage is a common phenomenon. The two currently separate literature streams are likely to merge into one in the foreseeable future. We also discuss the future prospect of DT. Other than manufacturing, DT has great potential in applications such as health care and ecommerce.