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 __   _     _____     ____      _____             
| || | ||  |  ___||  |  _ \\   |  ___||     ___   
| '--' ||  | ||__    | |_| ||  | ||__      /   || 
| .--. ||  | ||__    | .  //   | ||__     | [] || 
|_|| |_||  |_____||  |_|\_\\   |_____||    \__ || 
`-`  `-`   `-----`   `-` --`   `-----`      -|_|| 
                                             `-`

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Text this: A kind of domain decomposition hierarchical time-domain finite-element method (TDFEM) discretized by discontinuous Galerkin method and solved by Crank-Nicolson algorithm