delphi下对PHP进行二次开发的接口控件,版本6.2 PHP4Delphi is a Delphi interface to PHP for Delphi 5, 6, 7, Delphi 2005 and Delphi 2006,支持PHP至5.1.2-delphi right under the Second PHP Development Interface Controls Version 6.2 PHP4Delphi Delphi is a PHP interface to az r

：滤波 fs=400 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=5 时间窗大小 t=0:ts:T -hf1=zeros(1,N) hf1(f<=B1&f>=-B1)=1 y1=hf1.*fftshift(y) figure subplot(211) plot(f,abs(fftshift(y))/N,f,hf1, r-- ) axis([-fs/2,fs/2,0,1.2]) title( 原信号