已知拉普拉斯变换，则原函数为（00a000a000a000a000a0）https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/8741d17ecd3c4018b38c105582fe5adf.png
举一反三
- 单边拉普拉斯变换<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/423a53f9b3bf40989454133dbce2d262.png" >的原函数等于（）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/301dd2111ac64b0e8217cba94ba1a1ab.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/9772eee6eab34c208eba55009d00041b.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/42bfb5f864e34b5ca02a2a1cc9d9c71b.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/659eef6ba24b490191772fe51bab3c9a.png" >
- 已知信号<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/82c317e53c6941b59567bc236a6ec9ba.png" >，则奈奎斯特取样频率fs为()。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/7f3cd88d635b4fe0871233447ea5494b.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/53752d34e4c64504bc111e280262e228.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/50d5151b1d3f406185372b2ac9f19f93.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/ad47ea06d5aa4270a8e0089425f0bf6d.png" >
- 已知Z变换Z<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/94487389db974f98b2d38b947ec20d83.png" >，收敛域<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/56b4868c286b4b48a8cec67f9f766670.png" >，则逆变换x（n）为()。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/547656863c8b459da97c366d9321ef13.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/d3572493bf964e2d92fde49d59b632af.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/c4aacba69e0445b0ad4db797b3c86d53.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/b9af7d9dccb3446595a3a587492eb92a.png" >
- 已知单边拉普拉斯变换<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/880fd350069743a4a2d3750ba3a7e5df.png" />，则对应原函数的终值<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202101/85c3dd75650d4b01bbbb307f9a828b67.png" />=（ ）。 A: 4 B: 3 C: 2 D: 1
- 下列Z变换正确为（）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/8cfe627e0fb740168b114ff72f3c2ecb.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/a404460444d040dd920cc3ce0a62d29d.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/d158b2dd2dd14823a399a5680f13d9c3.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/9e44b4e907fd4a76902dd04d6284e6b6.png" >