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ĿǰڼȨʵ֤оֻ࣬NewmanĹ[66]ᵽһڿѧҼȨо

ȣҪۼȨļȨıҪ뷽ʽһʵΪȨĹ̲ƽӹġȻʵԱ ϵ磬ֱӰѾΪȨͿˣǶƹϵ̶ܳȵϵ磬μȨֵˡ ǣϵͳаεͬһԵĹϵʱ򣬾ͱϸоȨʽˡ£ijһѧڵĿѧ [66,68]ΪܼȨ硣

Ϊоijһѧķչ仯ijһµ˼ڴڵIJǹһѧ֮ͨ໥ϵӰ硣 Ϊоԣѧ֮ĺϵ[66]Ĺϵ[65,68]ԼۻŽлУͬһԵĹϵ õij̶ͬڽ˼ԣֱӵӰ죬ģٴΪлңͬΪĹϵڣ IJͬڽ˼ӰҲDzһġˣѧУÿһߴۺϿε໥ ԺӰ̶ȡĺлԣһȨ硣

Ȩľ̬ȼֲȨֲȨԣȨȵԣȨṹЧ֮Ĺϵ ̾뼰ֲֲӦȨĶԱȣϵ۷ԼڼȨϼ۳ ȵĶ弰ͳʡ

ȼȨı뼯۳̶ȵȾ򼸺Ȩľ򼸺ڼȨʵ֡ȨķֲӳDZ ѧĻԣΪѧоΪ׷ѧĻôӳǴѧоĻԾ̶ȡ

ĶԣȨԿǷԾĿѧںԾĿѧҺЯ һֿеķǰijһȨΪӸõеıߵȨ֮ͣ

Woutu = $\displaystyle \sum_{{v\in V}}^{}$Woutuv$\displaystyle \delta^{{uv}}_{}$ (8)
ԼеõıߵȨ֮ͣ

Winu = $\displaystyle \sum_{{v\in V}}^{}$Winvu$\displaystyle \delta^{{vu}}_{}$ (9)
УϵΪ򲿷ͬʱWinWout

ȨȵоǿѧҺĹ㷺ԵĹϵһС ĶȵĶ壬ÿһֵ doutu, dinuȨֵ Woutu, Winu-- Woutdout, Woutdin, Windout, Windin ԣԶ

$\displaystyle \left\{\vphantom{ \begin{array}{l} W_{u}=W^{out}_{u}+W^{in}_{u} \\ d_{u}=d^{out}_{u}+d^{in}_{u} \end{array} }\right.$$\displaystyle \begin{array}{l} W_{u}=W^{out}_{u}+W^{in}_{u} \\ d_{u}=d^{out}_{u}+d^{in}_{u} \end{array}$ (10)
ҲȨԡ

ȨУǵоעӽṹ뼸ʵĹϵڼȨУоӦȨļ缸 Ӱ죬ԼȨ֮ĹϵҲȨļԡǿͨʵʼȨȨߵƥ䷽ʽʵĸı䡣 ȻڼȨУҪõطӳļ[12]ȫЧʵĸ ЧʵĸͻȨӰ졣ǿµЧʵĸȨĹϵΪһģͣ ǿȨĻϰһķʽӼȨشӶγɼȨ硣һܵķǣձߵĽȨ ȨʽЧʵӰ죬Ȼ󱣳Ȩؼϲ´Ȩƥ䣬ٿִҺЧʵı仯ַ ͿֲȱȨģ͵µIJ㡣Ȼһ棬ҲʵʼȨϽͬۡоܹ̽ ȨļԣܹȨģ͵о

Ȩһ˼ǵλȨ

Uv = $\displaystyle {\frac{{W_v}}{{d_v}}}$, (11)
ʾÿһӵƽȨءйصλȨͳƷֲԼԵоһȤ⡣

Ȩе·ָ֮ͨ·УȨ֮Сһ·ڿѧУµ˼ ϵĴءȨĶСȣȨı··ĸı䣬Ҳ仯ڿѧ УӳڱڣijλѧӰĴСijһĽڶֲֻʳΪ[66]ȫ ĽֲӳǿѧӰIJΡߵĽӳDzͬѧ֮ĽѧƷչӰIJͬͬʱñߵ ҲԶԿѧ۷ϾȫּҪӦȨԱо

ǿ֮ľڼȨĶ̶֮ܳȵIJͬ˾ϵԺǾͿ۷ ѧ֮Ľš۷ԺͻڱߵĽ۷ԱȡȨĿǰȻһд


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