• 2022-07-25
    在圆柱壳轴对称弯曲问题的基本方程中,有三个方程式自动满足的,我们只需要求解三个平衡方程,它们是:
    A:
    B:
    C:
    D:
  • C

    举一反三

    内容

    • 0

      有一LTI离散系统,其差分方程为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/56de766141c64b2f93809c0d9a707900.png" />其传输算子为? A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/47db6248d80c41579452e5265852f031.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/d3ee5176fb5d4c55af1b973b3bb6c66b.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/10f3f84e8c0648d292fdfd7a07edac2e.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/6c0a80355cf4445b89706482a3cd4891.png" />

    • 1

      求解线性方程组<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/880cd7ef18d94cc0aa4ee9c0b7118d33.png" />的雅可比迭代矩阵是___________. A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/1408cafef14540b494c7b6c38ea2e6cf.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/568a94ce0d574f3ba8a3baf7e3b2ed88.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/763ed8aa81884ee18fc5168914e29a6f.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/467528c3ec81466494978179c7c43c48.png" />

    • 2

      已知系统的差分方程为:<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/4d2011df82b5487b90c89c82392b7635.png" />初始状态<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/69fdc69872fc4526b3406d4e545b5423.png" />输入信号为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/75e7d55edcb246e396b63e810f4b0c5f.png" />求系统的零输入响应。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/f3d4c0dc2e044821ad7f2fa06ae922de.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/5b82c0acece14a83ad58bc9d533a1885.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/06178caff4d54505b3a9dbfcd3f413ea.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/0b7c106121734430927a095f909fe51f.png" />

    • 3

      <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/2205d9f03e724a04b34f2f1045309079.png" />的幅频响应是,幅频响应是。 A: 1,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/760d7fcc2f264ed1b10fb836cb48f565.png" /> B: -1,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/21f685d2962e4b6993bfcaa513bdbf68.png" /> C: 2,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/57267e995f86426899ce3cc0177a2343.png" /> D: 1,<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/ea8ba62853a94a15a5620c5165e3594a.png" />

    • 4

      已知<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/43114282e941476ba93775909fb3f237.png"/>,用拉氏变换法求解微分方程<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/0db291610cb64fa8ad46ae0bd15476b0.png"/> 的结果为( ) A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/29ff68f02bdd438bb2e16c2a6e1ec18b.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/0010c1593c9145a4b928548ab38cf426.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/1f562f2536584121b53c30e4db08df88.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/f593399cb630435192baa8b3e871b533.png"/>