width="350px">
  <figcaption style="padding-top: 10px;text-align:center"><b>Fig.1</b> An oversimplified view of a data center.</figcaption>
</figure>
<p>There are many examples of the digital twins approach in the real world, such as <a href="https://www.infoq.com/presentations/tesla-vpp/">smart grids of batteries</a>, <a href="https://www.alibabacloud.com/solutions/intelligence-brain/city">smart cities</a>, or <a href="https://www.youtube.com/watch?v=9y27FJgz5-M">monitoring infrastructure software clusters