dx/[x(1-x/xm)]=rdt
â´xm·dx/[x(xm-x)]=rdt
积åå¾å°ï¼
â«xm·dx/[x(xm-x)]=â«rdt+C1
â«[1/x+1/(xm-x)]·dx=rt+C1
â´lnx-ln(xm-x)=rt+C1
â´x/(xm-x)=e^(rt+C1)
â´(xm-x)/x=e^(-rt-C1)
å³ï¼xm/x-1=e^(-rt-C1)
亦å³ï¼xm/x-1=Ce^(-rt)
代å
¥x(t0)=x0
æ±å¾ï¼C=(xm/x0-1)·e^(rt0)
â´x=xm/[1+Ce^(-rt)]
=xm/[1+(xm/x0-1)e^(-rt+rt0)]
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