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 __   __     ___      ______     ___     _    _   
 \ \\/ //   / _ \\   /_   _//   / _ \\  | || | || 
  \   //   | / \ ||    | ||    / //\ \\ | || | || 
  / . \\   | \_/ ||   _| ||   |  ___  ||| \\_/ || 
 /_//\_\\   \___//   /__//    |_||  |_|| \____//  
 `-`  --`   `---`    `--`     `-`   `-`   `---`

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Text this: Improved power system state estimation based on rectangular coordinates