基4时间抽取FFT算法中由短序列DFT合成长序列DFT的矩阵是（ ）。
A:
B:
C:
D:
A:
B:
C:
D:
举一反三
- 采用基2时间抽取FFT算法计算<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/f67e1917247149b497ced3c3798bea9a.png" />点序列的DFT，以下（ ）流图是正确的。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/76a32272ec1c4ab7a7efff7430a72d78.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/5398db8fd5714235b18480d2d9d3cfae.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/79bb453e60504ef195ebe4368d76c8a5.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d521c85331ce46948d059dd2875d17e7.png" />
- 基2频率抽取FFT算法中时域序列分解的蝶形图是（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/7ca0b619afd44022bf8ce67c67afd54d.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c9e44ade5dd4492f8ff9296540f4860a.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c24a7ec44e3b4bfc8b08bb120429ff18.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/1f93041df7124232ae9c76f2ebc8fc4c.png" />
- 由4点复序列FFT计算两个4点实序列DFT的过程是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/401169f02276408382a4fc5043e4b8f5.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/2b6fa60079514253a349fd10e63668e3.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/a3490a05942d4ebbb8d9032cc9a482f8.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c834a14365ab48949bb57ce889b3e6ea.png" />
- 由4点复序列FFT计算8点实序列DFT的过程是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/1e3f0eca0c9b478ca4acca7cdaf88f37.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/1218ee70b01f4ab9939f00dd6499d774.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/10ab8dca13c84189ac1a04046114bbe6.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/979828d8dd12409db830eda0447e9b33.png" />
- 对于下列已达平衡的反应体系，若压缩容器体积，增加体系总压力，平衡正向移动的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/326095eaba6d40a3bc4057c25f7eae82.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c8f59ca38f9a41db94d913281b203ada.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/41aeceac712749ada229b477082c26aa.png" /> <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /> <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/0084729e370b40eab5afb29706560d04.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/f92df5cfb06d4322aca5548a0937215a.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/8fd7733b85054932be29f9c24c10f538.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/bfdf951768ce48989962f5ffbf5b8a97.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/6661619fa794442781036239c942bac3.png" />