• 2022-06-19
    利用Laplace方程的基本解,求解下列方程的基本解:[tex=20.0x1.286]ucG7f0m+OiRZiKum7z2GoNWqhP70LWD87kgtd0uuCN+ssqbY8dj2AhjAYrmo51qSmbSJyZCOncfe+hX4yOwzesb0s2sxLIh+H1Yp7vwpjBytyB4tQ6i9kBOPCv+BNQTd[/tex]
  • 设[tex=5.143x2.357]sS8q+VfwceH1ws1di5k9dn+XTAAs1qEUPu4FJSFENOZPUov4z+a31zP0nIeL9Gsy[/tex]则原方程化为[tex=10.143x1.357]KpOUnW5K+HmaIB1mKIdDZD+WyIaixJNoOJy6XKGHHM6BUxkvoMtKoN56bRkvTNn0LOE9jS+v5bualxCxrcTRrw==[/tex],由题意,得[tex=11.857x2.571]tPCtO9shamCyrusYvxM9n6FXu74akXV78dfuR3RIQ7sYt2bCPTBrybe8xyVDBCNRn0wn9Gf55DpWh6k2rUmWEdTZrePiNQSV7IonsXPQ5IY=[/tex],所以[tex=11.286x2.571]KpOUnW5K+HmaIB1mKIdDZPZ7Hlg67m3GL+5ZJK51B2z3Ij2sktDDT2ABEPZEJxRRLwqBBId2e5g7jHJ0fX77mGK3amHzOx5zk2dc8kZvx0c=[/tex].由于方程[tex=6.643x1.357]KpOUnW5K+HmaIB1mKIdDZD+WyIaixJNoOJy6XKGHHM7RflckLGKf2v8Vg+dE55Pw[/tex]的基本解为[tex=7.643x2.357]wj0vMMBcw1vGdjRyPQCDgtywpyVlB+Byz4Tb4OQ1CX2tIJHZmuZfcz4jEUAmr6Ph[/tex],所以方程(7.2.6)的基本解为[tex=8.857x2.571]wj0vMMBcw1vGdjRyPQCDgn1av+tj3lKI7eQGBaP89h8lrgz2PxQPLQMeniC/q/f8DBCfBqBQBEuWwpZ6FtxzHQ==[/tex].因此原方程的基本解为[tex=16.071x3.357]Bb/bKmZD5r+jhwKWXiZ7qeB0F6ksVRYsuiQUycMJzqPdg8DzVDZPXctf2cvmcSav3KsvIx59qTafgA95QVS7w/2wbQbOkmkw9+Qs9qi0TArWpf61MNozfKgKv72Ij8haFYFNUAP15mZFbEd2eJxM7cE5aEQB3SOFHXmGl6Hlz3Y=[/tex]

    内容

    • 0

      利用Laplace方程的基本解,求解下列方程的基本解:[tex=14.357x1.5]VdUWQz71jhfSgj9tZZptA92GZ8FO5YwUG4elQV6N5amwSIVCoy0V2jdRavtGec3stzR8UKac9juUXauxRNMyGw==[/tex].

    • 1

      设DES加密算法中的一个S盒为: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 15 12 8 2 4 9 1 7 5 11 A: 1010 B: 0001 C: 1011 D: 0111

    • 2

      写一个文法G,使其语言为不以0开头的偶数集。 A: G[S]:S→AB|BA→AD|CB→2|4|6|8|0C→1|3|5||7|9|B B: G[S]:S→AB|BA→AD|CB→1|2|3|4|5|6|7|8|9C→2|4|6|8|0 C: G[S]:S→AB|BA→AD|CB→2|4|6|8|0C→1|2|3|4|5|6|7|8|9D→0|C D: G[S]:S→AB|BA→AD|DB→2|4|6|8|0D→1|2|3|4|5|6|7|8|9|0

    • 3

      【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]

    • 4

      说明S盒变换的原理,并计算当输入为110101时的S1盒输出。 [br][/br] n\m 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 S1 0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 2 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 3 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13