Digital Twin Models

https://blogs.oracle.com/cloud-infrastructure/understanding-oci-iot-digital-twin-models

https://www.ibm.com/think/topics/digital-twin

https://en.wikipedia.org/wiki/Digital_twin#Types 

https://www.autodesk.com/design-make/articles/what-is-a-digital-twin 

https://www.mathworks.com/discovery/digital-twin.html

https://www.trimble.com/en/blog/construction/article/what-are-digital-twins 

What is a Digital Twin? Technology, Types, & How it Works https://www.youtube.com/watch?v=taSbwarjGGw 

https://www.dw.com/en/ai-doppelganger-cool-or-creepy/video-69593446

Inside China's growing digital twin workforce https://www.youtube.com/watch?v=SCHOrhX0hQI 

 When movies "borrow" footage from other movies https://www.youtube.com/watch?v=kMKAsnIaDNU