的Laplace变换为（ ）A:
B:
C:
D:
举一反三
- 考虑AR(2)模型<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/9c19d336a086430cab947cf3a40c8047.png" />,则AR特征方程的根为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/b8d42e894377426eaca4f3a382c0569c.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/cb2410db797c4dc5870eb9ab1dfae59e.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/505155f9e5654d3294291a0f104fd54f.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/ff900163e913414384b61dbd55a0c36e.png" />
- <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/78ba624fbf734c1d9af5e00e4b9c2044.png" />的Laplace变换为（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/ce12c2b6f25745f3a613f524ab3f0a15.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/1ac3b7dcc46848719b73c1751203b3f3.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/c5e3953d9bb040dd9b99aa8b1a9909bb.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/0ba32254e04f49eeaf592ef9fcbe6142.png" />
- <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/23eaf76ea4d840179921b8efeac91897.png" />的Laplace变换为（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/87f05a19f54c490f9e668a1b37b0e379.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/cefc4d67b0654ea3abe41386204117b9.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/4adb3e12b3584921855bf17691ed26da.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/722360ad93cc466da9f4d64b6a486bb2.png" />
- 系统的开环传函为<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/4c0fd44e4fd34ba5abebcf5cf4075e5b.png" />，根轨迹和虚轴的交点及相应的根轨迹增益为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/1a01ea0a12204b8395a0b5b77f6dff14.png" />，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/5973aa4feb8b449e936c4db36ba0f235.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/3212607aceba42119e02c092ee59c4c9.png" />，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/5e06d749351c40758f2d90bd5503ac41.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/646b41ca995f4f9883b1d2c4a17a1b4c.png" />，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/f268e2b90534408293cc995f99bf8907.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/212d583db0b74c5a84acfc955c422863.png" />，<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/5e06d749351c40758f2d90bd5503ac41.png" />
- 已知f(k)的z变换<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/fcb29424b0f74f9d8bf5e13ec738f383.png" />，F(z)的收敛域为下面哪一项时，f(k)为因果序列 ( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/a75ad7c5eb8849f6a24916fc871c1739.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/3e62806a63e74e78bb29212d2a5bef0a.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/25250b041bec4d5093675240862554e4.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/2eae229138be4af5a084d0996e2d57d2.png" />