信号通过单位冲激响应为的LTI系统，输出等于（ ） 。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/f6cb0e4770dd46459497fe9b56a87710.png
举一反三
- 两个单位冲激响应分别为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/b1f29e9ad1e54df9970c1be374e67572.png"/>和<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/4c734b95e1024abfbc0741fb7c5455e2.png"/>的LTI系统并联构成的系统的单位冲激响应是<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/d7c571b4af814da7997bc653b0fbe308.png"/>。
- 考虑一个连续时间LTI系统，其单位冲激响应为，当该系统的输入信号为时，系统的输出为 ()https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/4a3cffe6c74d4df8b589053c71fa2024.png
- 两个单位冲激响应分别为，的LTI系统级联构成的系统，其总的单位冲激响应是。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/7b8635bb2e444b109188d0e98b07eda0.png
- 下列哪个结果等于拉格朗日函数对时间的导数？ A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/71e251af38d1445ba51641b664c72b4e.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/dc04aa798b3d404cb6c1f5e3d08b3242.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/007e2f33b2c04914b2c60d6c01def954.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/81eedf26bc254250a56919c9fb55ff1e.png"/>
- 信号<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/c67ef484b9f44325881bb93d513d4b28.png"/>通过单位冲激响应是<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/9f31696ca833480fb881cbc3523f3db2.png"/>的LTI系统，<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/fd12806eeb5c4e898fe9689b48dffd73.png"/>，下列说法错误的是？ A: 如果对h（t）进行换元反转及时移操作，则卷积积分的被积函数是1+T-t B: 求0＜t＜1时的y（t）时，卷积积分的积分区间为（0，t） C: 当1＜t＜2时，<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/3a5bd3e706d5413f8edd6da0a8722c45.png"/> D: 当t＜0或t＞2时，y（t）=0