题目内容

In 1845, Mexican-American war erupted. America defeated Mexico and occupied a large area of its land(today’s Texas).

A. 对
B. 错

查看答案
更多问题

In September 2015, Chinese president Xi Jinping put forward the concept of building the new Silk Road economic belt and the 21st Century Maritime Silk Road for the first time.

A. 对
B. 错

当不同变换区间长度与N成倍数关系时,即N'=rN,N'点的DFT结果为G(k),N点的DFT结果为X(k),则G(k)的谱线要比X(k)的()且( )

A. 疏;完全重合
B. 疏;部分重合
C. 密;完全重合
D. 密;部分重合

N点DFT的周期为_____。

L>N时,对L点时序列进行N点DFT变换,其结果________(会/不会)失真。

答案查题题库