在netlogo模型库中有一个virus on a network，里面有一个代码to spread-virus) Z0 g0 i* C' H% r" \0 T1 Z2 ?
ask turtles with [infected?]
9 G' b+ M2 D( q: a4 P [ ask link-neighbors with [not resistant?]
6 e7 E! b4 v- p$ f; _7 w [ if random-float 100 < virus-spread-chance: F/ `. L* N9 p/ B3 \8 C* w$ L2 W, U
[ become-infected ] ] ]" X$ Z1 \! F8 A* T7 o, n
end) r2 B# R( X6 S+ b5 N
这里为什么virus-spread-chance大于random-float 100,就可以判断出become-infected呢？3 ?. E* X$ z4 E" B# F3 N) M V4 S- g b
to do-virus-checks
- X6 N, q3 S- z" v# B* O ask turtles with [infected? and virus-check-timer = 0]2 ?2 k ?* d5 Z8 O+ Y
[ d, @3 ^5 s- `% i; G( `
if random 100 < recovery-chance
: `. J; x9 _/ A4 j8 ~ [+ f* l, X: S% D- p) ~! D
ifelse random 100 < gain-resistance-chance
$ C: b; c/ Z9 C# ^. F, m [ become-resistant ], }7 f/ E0 \% }( m* R# o+ P* c$ U
[ become-susceptible ]: ~* E6 B$ f4 M" f Z5 ^8 c& \
]/ q7 |1 q* W* R
]2 ]% r Z$ ~; v$ s
end/ Z' ~* x0 Z$ L; f2 l4 u
下面同样这个问题不明白
6 X4 K: q. ^! B- ~. a3 U小妹求大神帮忙！！ 6 s, x/ H& O4 V
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发表于 2015-1-7 11:27:22
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