在netlogo模型库中有一个virus on a network，里面有一个代码to spread-virus
# ?6 S8 i( ~1 u- [ ask turtles with [infected?]
4 \; q9 e) g& E* k [ ask link-neighbors with [not resistant?]
6 @/ R9 ^! }2 M" U [ if random-float 100 < virus-spread-chance
) K: [" _" O# Z: s% D4 c [ become-infected ] ] ], Z9 H# _6 Z7 G4 e) I
end
+ j- O' j& D% g4 K) g6 X( A( x这里为什么virus-spread-chance大于random-float 100,就可以判断出become-infected呢？
0 h- d. `- W _4 w" E. f# _to do-virus-checks" ?/ l/ E0 Q' S. n! z( |
ask turtles with [infected? and virus-check-timer = 0]. Y) p% c+ p" y) [
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if random 100 < recovery-chance
2 d6 T" P7 s8 x3 J1 e( s6 O [
, v$ s* K e0 x ifelse random 100 < gain-resistance-chance
8 f% K0 P* c: H% S% o) E, ]. K4 m [ become-resistant ]" t D' z# @1 J7 `7 a/ F
[ become-susceptible ] I, \4 V( T" Z2 a
]
# E; l7 I/ X2 L3 j6 Y ]) q7 _0 w; r' N4 J0 H/ Z1 _
end4 p& u) s3 }' t
下面同样这个问题不明白( H o3 r" L; b& [( U' Y
小妹求大神帮忙！！
: c; d, G. x1 g& s- d |
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发表于 2015-1-7 11:27:22
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