在netlogo模型库中有一个virus on a network，里面有一个代码to spread-virus0 n& M2 b' }1 l! W/ R1 D
ask turtles with [infected?]
; v; _; U. n7 w& m A$ y2 S [ ask link-neighbors with [not resistant?]- ~ f1 k6 U0 ]6 M% q
[ if random-float 100 < virus-spread-chance u: u3 {# d2 y% A9 S
[ become-infected ] ] ]# ^' \, G. Q7 j# J3 p8 u- u) o3 c |
end
6 ~8 V4 a8 m# R8 u' }这里为什么virus-spread-chance大于random-float 100,就可以判断出become-infected呢？6 ]& s* e) C+ ]3 z- U
to do-virus-checks* o d8 f: }% t
ask turtles with [infected? and virus-check-timer = 0]
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; ]! F; ]; i* v. h8 w- O if random 100 < recovery-chance( ?+ Y Z0 t$ I, Y- u6 u) X8 ^
[
2 k: l6 a& q& C' V( G | ifelse random 100 < gain-resistance-chance
: _. @. Y- T9 D( e( @1 n [ become-resistant ]! M1 ^1 _: [, c) h$ }
[ become-susceptible ]
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o# E( \/ A. n7 I& m2 L' l ]& f9 [/ R5 k r: H( ^# T8 H) T
end
# w+ R- F3 F. G9 k1 Z3 A! r下面同样这个问题不明白4 `3 r, J9 h9 g ^: K" z
小妹求大神帮忙！！ 0 R8 A" D+ k7 }6 @
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发表于 2015-1-7 11:27:22
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