代码搜索：M
找到约 10,000 项符合「M」的源代码
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www.eeworm.com/read/245506/12796899
m m0401.m
%指令仿真
new_system('S04L1'); %新建一个仿真模型
open_system('S04L1'); %打开仿真模型
set_param('S04L1','location',[50,50,400,200]);
%添加模块
add_block('simulink3/Sources/Sine Wave','S04L1/SineWave')
set_param(
www.eeworm.com/read/245506/12796922
m m0724.m
f=[0 0.7 0.7 1];
m=[1 1 0 0];
[b,a]=yulewalk(10,f,m);
[h,w]=freqz(b,a,128);
plot(f,m,'-',w/pi,abs(h),'*');
www.eeworm.com/read/245506/12796928
m m0722.m
[z,p,k]=ellipap(4,5,45);
[A,B,C,D]=zp2ss(z,p,k);
[At1,Bt1,Ct1,Dt1]=lp2lp(A,B,C,D,10*pi);
[num1,den1]=ss2tf(At1,Bt1,Ct1,Dt1);
figure;
freqs(num1,den1);
pause(10);
[At2,Bt2,Ct2,Dt2]=lp2hp(A,B,C,D
www.eeworm.com/read/245506/12796931
m m0702.m
%复指数序列
n=-10:10;
a=0.3;
w=0.4;
M_y=exp(a*n); %计算模
A_y=(180/pi)*atan(w/a)*n %计算幅角
subplot(1,2,1)
stem(n,M_y,'r*')
title('模')
subplot(1,2,2)
stem(n,A_y,'b*')
title('幅角')
www.eeworm.com/read/245506/12796933
m m0721.m
%使用Kaiser窗设计低通滤波器
Wp=0.2*pi;
Ws=0.3*pi;
Rp=0.25;
As=50;
w=[Wp/pi Ws/pi];
tr_width=Ws-Wp;
M=ceil(6.6*pi/tr_width)+1 %计算滤波器的长度
beta=0.1102*(As-8.7);
kai_w=(kaiser(M,beta));
b=fir1(M-1,w,'stop'
www.eeworm.com/read/245506/12796936
m m0719.m
% M0719 系统稳定性分析
num=[8,16];
den=[1,5,23,50,5,0];
[Gm,Pm,Wcg,Wcp]=margin(tf(num,den)) %输出分析结果
margin(tf(num,den)) %绘制相对稳定的bode图
www.eeworm.com/read/245506/12796939
m m0711.m
n=0:127;
t=0:0.01:1.27;
q=n*2*pi/N;
x=sin(160*pi*t);
subplot(2,1,1);
plot(t,x);
title('原信号')
subplot(2,1,2);
y=real(ifft(fft(x)));
plot(t,y);
title('两次变换后恢复的信号')
www.eeworm.com/read/245506/12796945
m m0708.m
df=0.01;
fs=5;
ts=1/fs;
t=[-5:ts:5];
x=zeros(1,length(t));
x(16:26)=t(16:26)+2;
[X,x1,df1]=fft_seq(x,ts,df);
f=[0:df1:df1*(length(x1)-1)]-fs/2;
X1=X/fs;
plot(f,fftshift(abs(X1)));
www.eeworm.com/read/245506/12796950
m m0706.m
syms t f
f=-2*t;
F=fourier(f)
subplot(2,1,1)
ezplot(f)
subplot(2,1,2)
ezplot(abs(F))
www.eeworm.com/read/245506/12796962
m m0725.m
x = 0.1*randn(1,500); % 生成机信号.
b = fir1(32,0.55); % 待鉴别的滤波器
d = filter(b,1,x); % 自适应滤波器的输入
w0 = zeros(1,33); % 初始化滤波器的系数
p0 = 5*eye(33); % 初始化相关矩阵
lambda = 1.0;