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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