在netlogo模型库中有一个virus on a network，里面有一个代码to spread-virus: a- Q) R* r6 N8 Q, c( A; w' M
ask turtles with [infected?]0 n8 C q6 ^1 n L; [
[ ask link-neighbors with [not resistant?]
& R; E4 w1 m3 ~/ k4 r [ if random-float 100 < virus-spread-chance
, ?. t j3 @1 {' w; E3 X [ become-infected ] ] ]0 m i0 l6 F, Y: E5 \8 P1 W! z0 w
end
; v, Q' L) X; K O( H6 n# A这里为什么virus-spread-chance大于random-float 100,就可以判断出become-infected呢？
7 R( ^2 a; x0 o xto do-virus-checks
! H: [$ N) p' N% n) N( S% W( G ask turtles with [infected? and virus-check-timer = 0]3 m: G9 _& q$ u) Q7 C) e" a, H
[
3 G7 p2 \. _2 L& T" ]- \ if random 100 < recovery-chance
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ifelse random 100 < gain-resistance-chance
x& y) g+ S6 T p9 s [ become-resistant ]
/ D2 a g# v" a3 q. m: U' C [ become-susceptible ]2 x! ^8 C' a, ?, d& {
]
2 f+ c" N3 b0 P% ?* ^0 m ]
$ A5 r' y x2 X% k, C4 Mend. r! s$ }# w8 x, N2 ?
下面同样这个问题不明白1 j$ {% k7 j5 l9 m! t' x$ g
小妹求大神帮忙！！ 6 t5 ]' D8 v6 p, D3 H
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发表于 2015-1-7 11:27:22
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