2009.2009.15PROGRAMLANGUAGE1,:,;;、;、,;,:FTPP2P;;。:;。,、、,。MatlabMathWorks,、、、,。,MatlabM/M/1/N/∞。21。M/M/1/N/∞,,,λ;,N(N,),,,,μ。33.1,。Matlab,events,events,。M/M/1/N/∞,1。3.2,。3.2.1(1)λμ。exprnd()。,。,exprnd()λμ,1/λ1/μ。(2),。Cfor,for,Matlab,Matlab:,。Matlab,,。:;Matlab;11,152009.15cumsum(),。(3)。1,。3.2.2,。,、;,0。2。4,,λ=10/,μ=6/,N=20,Total_time=10。:clearclc%*****************************************%%*****************************************%Total_time=10;%N=20;%lambda=10;mu=6;%arr_mean=1/lambda;ser_mean=1/mu;%(round:)arr_num=round(Total_time*lambda*2);%events=[];%events(1,:)=exprnd(arr_mean,1,arr_num);%events(1,:)=cumsum(events(1,:));%events(2,:)=exprnd(ser_mean,1,arr_num);%,len_sim=sum(events(1,:)=Total_time);%*****************************************%1%*****************************************%1,events(3,1)=0;%events(4,1)=events(1,1)+events(2,1);%,1,%1events(5,1)=1;%,1member=[1];%*****************************************%i%*****************************************fori=2:arr_num%i,ifevents(1,i)Total_timebreak;%i,%elsenumber=sum(events(4,member)events(1,i));%,i,0ifnumber=N+1events(5,i)=0;%,ielseifnumber==0%02162009.2009.15PROGRAMLANGUAGEevents(3,i)=0;%events(4,i)=events(1,i)+events(2,i);%1events(5,i)=1;member=[member,i];%,,%ielselen_mem=length(member);%%events(3,i)=events(4,member(len_mem))-events(1,i);%%events(4,i)=events(4,member(len_mem))+events(2,i);%,events(5,i)=number+1;member=[member,i];endendendend%,len_mem=length(member);%*****************************************%%*****************************************%,%(stairs:)stairs([0events(1,member)],0:len_mem);holdon;stairs([0events(4,member)],0:len_mem,'.-r');legend('','');holdoff;gridon;%,%(plot:)figure;plot(1:len_mem,events(3,member),'r-*',1:len_mem,events(2,member)+events(3,member),'k-');legend('','');gridon;5,,3、4。6MatlabM/M/1/N/∞,,,。,,。[1],.--.,2006.[2],,,.--、.,2007.[3]Recktenwald,,,.MATLAB.,2004.[4],.MATLAB.,2006.(:2009-5-16)3417