在netlogo模型库中有一个virus on a network，里面有一个代码to spread-virus$ b1 r' t/ C9 k4 E: `
ask turtles with [infected?]
+ I, q, ^6 a$ m; x. E [ ask link-neighbors with [not resistant?]
/ k; y4 V" F; k3 Q. ~6 C0 V [ if random-float 100 < virus-spread-chance9 L, {7 D0 L* j& D
[ become-infected ] ] ]
+ |' K. Y. c7 Q. O+ X0 aend; T$ O0 M% H7 F: C3 l6 k
这里为什么virus-spread-chance大于random-float 100,就可以判断出become-infected呢？
" n! T4 C% K# C, @7 i/ N8 Jto do-virus-checks2 \5 T- x1 ]9 h7 A" G
ask turtles with [infected? and virus-check-timer = 0]; Q% d! c2 Y, U* K. b8 j
[ q! Y8 D# ^/ E( @' M) K( t
if random 100 < recovery-chance
" C0 P4 v* k6 c* C3 T9 a [
4 g& i. ]- ~5 {" F) r2 } ifelse random 100 < gain-resistance-chance
. U2 f3 ?% h' ` [ become-resistant ]. }" b0 W4 C! N1 W
[ become-susceptible ]
7 E, A A f* Z" \ ]
) a, v" ? }* I; y) I8 I9 B ]- y+ B, q. J- G4 T
end
7 P$ ?! s3 A+ O, N. I( j下面同样这个问题不明白: I9 C7 R( ^" ]# { e0 d1 f1 J
小妹求大神帮忙！！ 7 J9 L+ y9 E1 f9 e( V& R) Y9 ?
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发表于 2015-1-7 11:27:22
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