The diagnosis principle and diagnosability conditions are proposed, and the normal tolerance network test nede voltage interval are given by interval iterative algorithm.
By using active set strategy, the authors need only to solve a reduced trust region subproblem which is solved inexactly by the truncated conjugate gradient method.
DES algorithm decryption process is the same, the only difference is that the first iteration used Subkey K15, K14 ,......, second last with K0, the algorithm itself without any change.