Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...

Abstract: As population growth and urbanization continue, accurate crowd counting is increasingly important for public safety management and the Internet of Video Things (IOVT). However, RGB and ...

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