The waveform of a continuous-time signal is shown below. What frequency components does the signal have?[img=565x143]18033778cdfa035.png[/img] A: Cosine components for all harmonics B: Sine components for all harmonics C: Sine components for odd harmonics D: Cosine components for odd harmonics

A continuous-time (C-T) periodic signal is shown below, then the components of the signal include ( )[img=634x330]180337809123d5d.bmp[/img] A: direct-current (DC) and cosine components of all harmonics B: DC and sine components of all harmonics C: DC and sine components of odd harmonics D: DC and cosine components of odd harmonics

A continuous-time (C-T) periodic signal is shown below, then the components of the signal include ( )[img=634x330]17de808c88522e2.bmp[/img] A: direct-current (DC) and cosine components of all harmonics B: DC and sine components of all harmonics C: DC and sine components of odd harmonics D: DC and cosine components of odd harmonics

中国大学MOOC: 对于下面的一段python程序，sim中保存的是向量之间的：import numpy as npx=np.random.random(5)y=np.random.random(5)from scipy.spatial.distance import pdistX=np.vstack([x,y])sim=1-pdist(X,cosine)

对于下面的一段python程序，sim中保存的是向量之间的：import numpy as npx=np.random.random(5)y=np.random.random(5)from scipy.spatial.distance import pdistX=np.vstack([x,y])sim=1-pdist(X,'cosine') A: 欧氏距离 B: 余弦相似度 C: 余弦距离 D: 马修相关系数