说明：This paper reports on an investigation of the effectiveness of online discussion use in blended courses at Saudi Arabian Universities. The study presents issues that have to be considered before employing online discussion in blended courses. Using <weixin_43289964> 上传 | 大小：193kb
说明：1、用 MATLAB 实现下列序列，并画出图形：
① 单位采样序列移位， 10 0 ), 3 ( ) ( − = n n n x ；
提示：实现单位采样序列：
0 0
0 1
{ ) (
=
=
n
n
n ，可通过以下语句实现：x=zeros(1,N);x(1)=1;
n=0:10;
x=[zeros(1,3),1,zeros(1,7)];
figure(1);
stem(n,x);
② 单位阶跃序列移位， 10 0 ), 3 ( ) ( − = n n u n x <tvhjb> 上传 | 大小：461kb
说明：好用,简洁的图片录屏开源工具.
Image viewer, editor and screen capture
If you need to take a screenshot of your screen, you may simply use the PrtScr key on your keyboard. But if you also need to do some basic editing to the captured image, then FastStone Capture i <Carlous_Chen> 上传 | 大小：2mb
