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һҪܽ˶ʵľ̬ʵͳоһȥһʲôģͻչЩضͳʡ оϵĶѧģ͵Ļ翼DzͬϵĴȾģͣӴԴȾĴҥȺеĴ󣬻 ͬϵģ͡Щ⣬ǿѡ΢ַLogisticģͣ

$\displaystyle {\frac{{dx}}{{dt}}}$ = $\displaystyle \mu$$\displaystyle \left(\vphantom{1-x}\right.$1 - x$\displaystyle \left.\vphantom{1-x}\right)$x (12)
ǰ$ \mu$ǽܸȾ֮䷢ӴôȾļʡڴģУиǾȻϵģûоڵĸ ҺзĻѧӦһ$ \mu$ѼֻҪӴʹȾô$ \mu$ƽÿһĽ Ŀռ˿ڵıɴ˿ɼLogisticģ͵ıȫ硣Ϊ䣬ǿڹģȺķо һ⡣Ϊģʵ˵ύ硣һЩͨʵ֤оö侲̬һʶǶоЩ ϵĶѧģ˵ӹ㷺оҪģͣʵݡ磬໥ʶSmall World磬ô оϵĶѧģ͵ʱǾҪһӦΪǵıȻǿռʵϢ ȻʵϽзкܴľԣоܹһЩʵݻģͣ ôǽһ϶ѧģ͵оͿЩģΪһǶ˵Ȼľ̬оʵ дڵһЩʣôϹģЩγ뷢չҲһҪ⡣Уǽֱܹ ȫ[5]¼磩Small World[7]Scale Free[18]Ļģ͡


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