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 ______     ______    _  __   __   __    ______  
|      \\  /_   _//  | |/ //  \ \\/ //  /_   _// 
|  --  //   -| ||-   | ' //    \ ` //   `-| |,-  
|  --  \\   _| ||_   | . \\     | ||      | ||   
|______//  /_____//  |_|\_\\    |_||      |_||   
`------`   `-----`   `-` --`    `-`'      `-`'

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發送短信 : A lower bound of DOA-estimates by an array randomly subject to sensor-breakdown