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clear;clc u=7; %%%%%%%%%%%%%%%%%%%i>0时%%%%%%%%%%%%%%%%%%%%%%%%% fch1=@(Q) arrayfun(@(i) quadl(@(x) abs(x-i.*Q).*1/pi*u./(u^2+x.^2),(i-1/2).*Q,(i+1/2).*Q),1:100); Q=[8 9 13 18 26 36 52 72]; ych1=zeros(size(Q)); for j=1:length(Q) ych1(j)=sum(fch1(Q(j))); end %%%%%%%%%%%%%%%%%%i=0时%%%%%%%%%%%%%%%%%%%%%%%%%% fch2=@(Q) quadl(@(x) abs(x).*1/pi*u./(u^2+x.^2),0,0.5.*Q); Q=[8 9 13 18 26 36 52 72]; ych2=zeros(size(Q)); for j=1:length(Q) ych2(j)=sum(fch2(Q(j))); end dch=2*ych1+2*ych2; plot(Q,dch,'-sg')
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