PDF files have become ubiquitous in our multi-platform world. This convenient file format makes it possible to view and share documents across various devices using various operating systems and ...

XChange TEC.INC, together with its subsidiaries, engages in the insurance agency and insurance technology businesses primarily to individual end consumers in the People’s Republic of China. The ...

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, ...

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