在netlogo模型库中有一个virus on a network，里面有一个代码to spread-virus7 u$ x! e0 W1 V! M* m- E
ask turtles with [infected?]
7 A5 p$ H: {, g; `7 K [ ask link-neighbors with [not resistant?]
: w1 ~! c# l/ C [ if random-float 100 < virus-spread-chance. i; s0 s0 x% A! X- h
[ become-infected ] ] ]
* q! U* F& S' qend6 B7 S: v0 k0 ^
这里为什么virus-spread-chance大于random-float 100,就可以判断出become-infected呢？7 Q% M# S. T: I' R! U2 e
to do-virus-checks* x, y- c1 k, S6 W$ B6 p
ask turtles with [infected? and virus-check-timer = 0]
B$ Z0 n9 |0 n2 X Z- {" w [
; x! ?; x. U% w! x, u: M; q if random 100 < recovery-chance
1 s g }: {% s0 d0 M [0 a2 u/ ~ ?# O4 o( `5 M w& ]) D
ifelse random 100 < gain-resistance-chance
: i5 y4 Z/ y8 h2 W7 R/ S! M [ become-resistant ]5 o: @& d6 j0 D( J* l1 y
[ become-susceptible ]/ i0 M! m/ l$ K7 ^6 e
]6 ~$ V+ }) [4 X z
]
: N* k) V( d5 w4 V/ H5 wend# L! h: ]# ]- C' ~% y/ v9 T
下面同样这个问题不明白
* q& A+ B/ L$ `. ?' D小妹求大神帮忙！！ * {! `2 S( ?# p0 z6 `. W
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发表于 2015-1-7 11:27:22
楼主