Abstract: With the development of $5\mathrm{G}$, the location of base stations is related to the electromagnetic wave scattering with the surface of objects, especially the building walls in cities.

The @a_sync('async') decorator can be used to define an asynchronous function that can also be executed synchronously.

Abstract: Static type inference is an effective way to maintain the safety of programs written in a dynamically typed language. However, foreign functions implemented in another programming language ...