已知,,,用拉普拉斯变换法解微分方程的零输入响应和零状态响应为( )。
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举一反三
- 已知 f (t),为求<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/1fb776d0006a4eb2b93e07afcad58896.png" />则下列运算正确的是(其中<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/ada31d4207fe47d4908574b0a478486b.png" />, a 为正数)( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/fb0a09472a6b4408b3e833c2568308db.png" />左移<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/ada31d4207fe47d4908574b0a478486b.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/fb0a09472a6b4408b3e833c2568308db.png" />右移 C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/06dbb96ce1044280b13167a33033e4c6.png" />左移<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/ada31d4207fe47d4908574b0a478486b.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/06dbb96ce1044280b13167a33033e4c6.png" />右移
- 已知某系统的数学模型为<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/36eb028cda9447468911e236a321722e.png" />,那么系统的沖激响应<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/2a6ea359e85c408fbece93c2e81f6076.png" />为( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/2c5c40b2c9f84205812addf9df60664b.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/d1350a891d364096858a5f83a7415ece.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/e1352972cbd24aacb663ce6ef7fc95fc.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/1c91057ec86848a1b761ccb26b3ed883.png" />
- 试求序列<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/cb5683e4401b464bb94af075183c06d2.png" />的双边z变换及其收敛域( ) A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/07475602a8b04ef18fe697ba033d87cc.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/9d0ea6592c7d45a28bb6dac86e53ca52.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/d594b5541bf8465d9eca5af4a3b38545.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/ddd3f7717f134d54a0e27eef90e3b930.png" />
- 下列化合物存在顺反异构的是( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/f14204f643814b84bf651ec9404a27d2.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/2960cc15743342ba8415b73975674596.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/f4313a484dbc4c14867fee1d1d3845d8.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/b848dd83a35c43d4acca3b558de80d36.png" />
- 求序列<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/5131160157fe4bc7bd53878104ffd1cd.png" />的DTFT为( ) A: 不存在 B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/e521d6f23d234b38b3ad34622a74b1b2.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/fbec0bedcb3c47a8825ec337b818764f.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/5fc107dac73e4c00afcf8f1701f80a47.png" />