设为首页收藏本站

最大的系统仿真与系统优化公益交流社区

 找回密码
 注册

QQ登录

只需一步,快速开始

查看: 8074|回复: 1

[悬赏] 求教:海龟的遗产传递问题

[复制链接]
发表于 2008-5-3 20:47:29 | 显示全部楼层 |阅读模式
请问 我现在希望设计海龟死后他的财产可以以一定的比例留给后代。这些海龟如果代表的是穷人则它死后(年龄大预期值)会生出3个孩子,其生前的财产的90%均分给其孩子。若海龟是富裕的,其死后有随机1~2个孩子,财产已70%均分。请问大家如果加到下述程序中怎么实现
/ c( k" b' S5 v( H& ]) i$ f% ^globals) k) s" F/ z2 t5 }: h1 D0 }
[
+ \  _/ \1 I) e$ @4 _  max-grain    9 M3 n2 k3 x1 Z7 Q1 t( S* b

: B; ?8 K9 B% t0 {, o) f9 B]* p# p4 f6 I/ m0 l

* k) `$ W: j! T8 h$ Jpatches-own
% i, H' c, D  p! g% L- h[; m! B4 [& C. S. @7 n
  grain-here      " R3 }& b2 d3 c/ F
  max-grain-here  
! x- o5 `0 C* |& P6 I# X]
) b( Q4 X: S( B* b7 V2 V* F; ]7 S/ U. W
turtles-own# B. @) ~) |1 U# r9 a) d
[
* I3 U6 i/ Y# m( |8 x  age              3 F" S& J) h; S/ I+ z- C
  wealth         
7 s$ J( M" ?9 t' b  w! u0 C$ A  life-expectancy  
. j% Z0 f% \5 ~0 x. d, S, ^  metabolism      
! a0 D  J) q3 |$ R  vision- `7 Z6 _$ b0 c0 a
  inherited         : a) {  s9 V/ W+ J8 N
]' `. c( U2 O# l1 d: a
" ?4 p9 v: S* |* z4 |! ^$ N

& N" M( C" @: V9 i- f/ f# O5 ~$ ]to setup4 V5 e, j( a$ n# ~3 e  G
  ca
% ~; a9 x0 Z0 p$ l  set max-grain 50
  [0 @/ @8 k' n( C  setup-patches
' Y& g1 h) b" x& s6 ]2 z3 A+ m* P0 Q4 @  setup-turtles$ r' O* _+ X& j4 A3 C' Z4 h
  setup-plots
3 k& u$ W- C4 v% T  update-plots+ T6 o, d) Z5 Y6 U- N9 M" t
end5 Q  u2 r) B9 v5 u/ i
to setup-patches; n4 i) R" h8 B+ I9 G/ a6 |
  ask patches
+ a. ]) ]5 ~# `& F$ L7 ?    [ set max-grain-here 0
* {, w9 y0 K! {      if (random-float 100.0) <= percent-best-land- X: e7 }& y; R# Y* i! m- n7 i: |
        [ set max-grain-here max-grain4 D% q# K# d' ~, p* F
          set grain-here max-grain-here ] ]
% S! Q( I! z8 d( N$ I7 J4 `) u+ A9 v  repeat 5* k& y: L% r3 h: ^! M6 l
    [ ask patches with [max-grain-here != 0]/ t& V! v$ R7 w$ J: z, c
        [ set grain-here max-grain-here ]. n; i9 Z; `" D2 D4 V' t
      diffuse grain-here 0.5 ]
1 }& S8 }. }3 z7 v: F  repeat 10
0 v; g& t+ [4 |    [ diffuse grain-here 0.5]         
! U9 c+ @- F6 z3 ~  ask patches
/ T8 {+ @* t; T: N1 C    [ set grain-here floor grain-here    " J4 p- o1 W' h+ P; [
      set max-grain-here grain-here      ' c- u- d" ?3 `/ n
      recolor-patch ]$ q4 ~/ @2 ]; s  T5 i' n  p4 h1 L
end9 ]1 l$ C1 a$ ~' v1 ~
to recolor-patch  
! L5 k3 {' z7 O# r  F% O  set pcolor scale-color sky grain-here 0 max-grain
) W4 ~$ e+ U" ~3 B$ Z5 b6 y% Wend
5 T  Z4 ~$ M# p( G6 J) pto setup-turtles  N, \# W+ o+ @. t
  set-default-shape turtles "person"
; m. c" B* y. ]# c9 v3 d  crt num-people$ Q5 u" X% C9 U5 P3 ]- o: @
    [ move-to one-of patches  # D! ]" I' v1 l0 q- E% G
      set size 1.5    f, k# @8 Q& S* ~' L
      set-initial-turtle-vars-age" M  C0 d* H9 }
      set-initial-turtle-vars-wealth/ A2 s- u, R6 J: g0 q
      set age random life-expectancy ]
4 R' k1 \! ]2 H3 ^  recolor-turtles
2 R3 B# Q' W$ ]. |' t& Wend; u( s6 D- V2 \  C7 n1 y/ g
$ I  X: U' g9 [; a
to set-initial-turtle-vars-age
5 q4 U2 p' A6 p let max-wealth max [wealth] of turtles
" ?0 I4 Z7 I. t   
1 [  ?6 U" U+ y4 t     ifelse (wealth <= max-wealth / 3)
: K: C4 v4 |9 t- k  F        [ set color red : ?" n1 p4 U/ G8 k& }
          set age 09 ]0 L( R8 k/ z4 l8 B5 o2 m
          face one-of neighbors4 0 |1 a% |7 c6 d5 D4 j
          set life-expectancy life-expectancy-min +' ^$ U& h. j2 ^: P
                        random life-expectancy-max $ {4 g% Q% ]$ S. _1 }4 H: u$ f
          set metabolism random 1 + metabolism-low
# g1 I/ }8 s' H0 `$ |          set wealth metabolism + random 30. ?9 T, |1 b; v0 K) j
          set vision 1 + random max-vision% O% e) d5 [0 a7 N- ~2 v
             set wealth  wealth +  Wealth-inherited-low ]
2 k3 }) r5 D- K0 {; H- Z' e6 h        [ ifelse (wealth <= (max-wealth * 2 / 3))
' K1 r$ C0 D* b( {( v" M            [ set color yellow
1 w9 N0 ^( d7 b0 |8 o              set age 03 I+ ~* p* f4 i3 K
              face one-of neighbors4 ! M5 y4 y) c! J7 f9 p/ I1 P
              set life-expectancy life-expectancy-min +
  e: C5 ]* X% k2 {                        random life-expectancy-max + 16 H) v* \6 X, m  \' N/ y9 y% O. w
              set metabolism  1 + random metabolism-mid
4 v9 V: E+ o1 `1 `4 e+ U4 }- n# `: Q              set wealth metabolism + random 30  T/ R' j5 k) V8 c1 E
              set vision 3 + random max-vision
# T7 @) F/ q/ N8 r! g1 d                set wealth  wealth + Wealth-inherited-mid]  a  f' X' D" v9 R: o* K6 c$ {
            [ set color green , C8 y3 l) J' \3 c$ `8 z
              set age 0
' c. E3 Q3 }6 l% S' @  a+ m              face one-of neighbors4 . E& ^% U* g2 G! T% m
              set life-expectancy life-expectancy-min +
+ Q8 M) ]+ [6 n1 Q' |- f* I3 L                        random life-expectancy-max  + 2( [, ?. H( S- D; c$ Q! k
              set metabolism 2 + random metabolism-up
2 {% T) I8 s# q3 G: a              set wealth metabolism + random 30) B2 C2 V2 {- i7 q. R- S1 S
              set vision 3 + random max-vision
8 M4 D$ ~% o' T3 D* h5 m              set wealth  wealth + Wealth-inherited-up ] ]
% Y; q2 N: x4 G/ a( T* u . ?. x/ o6 o9 b
end- J4 k9 q/ h; X/ s+ E; J2 F
to set-initial-turtle-vars-wealth( ^+ F% f+ i: q: m9 d% x8 ?" C  l
let max-wealth max [wealth] of turtles
; I( d3 k3 E- g% L; y8 f* M          set age 0
9 p: u) Q/ l+ n, j: I, G7 B          face one-of neighbors4
% D. o0 d6 p% ?          set life-expectancy life-expectancy-min +
( p+ X; n; Y5 g4 `5 Y, x* W                        random life-expectancy-max . C  j" E* a- D6 G3 y. r/ K0 @+ h7 q
          set metabolism 1 + random metabolism-up- a9 Z9 e* ^" ?
          set wealth metabolism + random 308 h* V9 I& }+ C
          set vision 1 + random max-vision 8 _  z3 K2 x# e# {! m8 p* t$ `9 A9 [
end3 A) j! I- l7 @) F+ w
to redistribution
1 M9 p5 ~* W1 m* z8 Slet max-wealth max [wealth] of turtles
' z  N5 h3 L3 \& t$ Q4 W/ O/ elet min-wealth min [wealth] of turtles8 v. q2 ^: M/ a: O7 T+ k: @
if (wealth <= max-wealth / 3)6 u7 Q+ Y1 @5 l/ a
[set wealth  wealth + Low-income-protection ]* B% b! e) X5 k! S) Q3 Y
end3 v' B2 q$ B; y1 Y4 l/ k2 e% C
         
8 F* T& |& N" l+ r! r4 s, K; e, P' ?to recolor-turtles4 K1 P5 @- u- e/ }" g
  let max-wealth max [wealth] of turtles
: |! I$ k: C' Z0 {) I# v9 n  ask turtles9 B' Y( j' h! ]/ J' _
   [ ifelse (wealth <= max-wealth / 3)
! S& C8 J5 @, n, O        [ set color red ]
' J, t5 I+ l% {" C$ i        [ ifelse (wealth <= (max-wealth * 2 / 3))
4 t) a, |" o5 z2 E+ ~            [ set color yellow ]
, N# w# @+ f' R* q9 C3 M4 r% Q            [ set color green ] ] ]( v. F7 }/ \; |0 ?' a
ask turtles [ifelse show-wealth?
7 m  o' f% N, B. o+ b    [ set label wealth ]0 o0 `; @6 ^7 Y5 }: P
    [ set label "" ]]
( Z7 {$ g7 B. G  ?* wend& I# ?" N% G1 ]" a' z* j1 C3 X& ]

0 s9 M* v# S. W! Z0 H- I" ]to go
# x2 v' j% `$ _& G) Z+ c  ask turtles% k  }$ B; _# Z% t
    [ turn-towards-grain ]  
2 o  `0 K, |/ `) ]  harvest  V* r2 t! n6 n; U. I4 ~
  ask turtles
5 w/ v: U/ q# ~' w% d8 v8 R    [ move-eat-age-die ]
# M' s" S9 [! B  recolor-turtles
& l4 a3 s% w, u4 m5 I  if ticks mod grain-growth-interval = 0. u: v* @  C4 }5 D! }
    [ ask patches [ grow-grain ] ]5 \+ [9 C7 S  e; H# F3 Q6 l
   
, ~$ H8 B# z4 L! [  if ticks mod 11 = 0  c) Y3 t2 l$ a. C
  [ask turtles
3 v+ r* v& c+ i  [ redistribution ]]
8 f! }% P8 o: Y' I( w& ?1 o  if ticks mod 5 = 0
! y$ J: S2 N5 T, y- p6 m! D   [ask turtles
8 p0 }9 K6 |' c% T7 p3 `  [ visions ]]
' `* d+ B) x. S8 e2 F  tick
( G; y8 y" g: b6 o7 M" X8 I  update-plots
% `8 M) B7 W: z6 Aend9 v; x8 o7 E# m- k
to visions
+ O, G) q8 C, W0 ]" I* m set vision vision + 1
7 ]: Y3 A8 |- L5 l( Yend
! h- z8 R* ?% s* Q( h; g5 F, H" {6 e2 ~; Q- ~
* z" U3 ^. ~/ p9 Y. i3 C/ |- ?
) r5 Z, S! I( k& P9 U4 y% j
to turn-towards-grain  ' M" K6 V* C! n8 q
  set heading 0
$ J' m$ o0 H3 ]. h& @: ?0 R( f3 r  let best-direction 0
/ p& J; h. L) |! d* E  let best-amount grain-ahead
; ~- U. M+ q: l2 E, E  set heading 909 I5 `! G- |3 c/ u7 {9 }/ k2 I
  if (grain-ahead > best-amount)
7 g. L; D2 G4 x: C& M    [ set best-direction 90
$ h: O; y# A3 c- k  J3 _' e      set best-amount grain-ahead ]
( N' [" ]8 s( m8 t0 Y) K' F$ @2 i) c  set heading 180) P9 Y( O# d, R+ |
  if (grain-ahead > best-amount)5 ]& S8 ]9 H  u% u
    [ set best-direction 180
# t$ v) g$ K' ]1 X7 f/ d      set best-amount grain-ahead ]* w1 [( x/ T! c/ B9 D# Q+ \% M
  set heading 270
* t9 C1 Y  P' p( j( d7 S: @  if (grain-ahead > best-amount)
( i1 B- \% y+ v    [ set best-direction 2701 z, F; ~3 y6 ?# V5 I1 u
      set best-amount grain-ahead ]: L7 b9 X# D, G3 t+ a: N, @3 d
  set heading best-direction
7 @/ u9 \: O' D) Z! W3 |5 Xend6 k' w* ]/ y$ D* ?1 n0 [* u
' s2 X# w, Q. M  g3 J

0 N3 p$ N' T3 p% O! Kto-report grain-ahead  # S  D9 [1 P; I- g7 c& J) `; k+ u
  let total 0
4 A* k( u8 L( L# a  let how-far 1
' r8 ~$ p. J) r2 b4 a  N  repeat vision  f! W  J" X) b! c
    [ set total total + [grain-here] of patch-ahead how-far8 `' S2 C* e1 Y: O
      set how-far how-far + 1 ]
: Y3 k4 f- @/ o8 c, S  [4 N0 l  report total  N7 E( f! i1 f  B- i
end' l6 W4 Q& r+ R5 R" _3 |5 d6 x6 O
: C( [5 P# J1 [/ W: i" _9 z
to grow-grain
% ~$ v3 F! S4 r) I0 g1 k5 U0 h  if (grain-here < max-grain-here)
7 s6 H; C" H/ U6 `4 I/ z3 y9 K( l    [ set grain-here grain-here + num-grain-grown
9 R) ~0 H7 |& \4 Q      if (grain-here > max-grain-here) + o$ \; r/ a( G/ ]* g
        [ set grain-here max-grain-here ]* N0 I4 @  o; T
      recolor-patch ]
- S2 Y5 e  |9 M6 P2 ^) U- f1 O* S8 Dend
( a  s0 y: j+ v# h  xto harvest
: k. h6 n$ x2 Z5 V  ask turtles; J% w2 D" F9 s1 T% ~) E: p
    [ set wealth floor (wealth + (grain-here / (count turtles-here))) ]& J! @' L1 l7 M; T% Q
  ask turtles- k: R/ G5 ~# A
    [ set grain-here 0* z+ S2 u7 S- ^; l; N) N* O7 a; }
      recolor-patch ]  m4 v- M! n% a9 Q3 i
  
5 m% N* Z- Y9 M. A! vend
6 A* w" E& R5 l  t" |: [( Z- G0 B7 T9 y+ `
to move-eat-age-die  
# [7 O; K+ U1 q( F3 f0 h+ }% O  `/ [  fd 17 A) W0 D$ \& l8 R0 r
  set wealth (wealth - metabolism)
5 A0 c6 C$ ]* a! {/ t    set age (age + 1)3 r7 K8 x# S( _' t( J+ }
  if (age >= life-expectancy)
8 i' P5 E8 }5 t  K# l: G    [ set-initial-turtle-vars-age ]
% A- x# R4 ~/ z& j  if (wealth < 0)
7 ~, ^. Q, L# b+ D) H7 i    [ set-initial-turtle-vars-wealth ]
/ f/ m1 x! G8 E) E" p8 Y4 M1 B, S   
. i) n- K1 r5 I% V. wend! ~; |# o3 d* Z) ~; i, V* q
: A) k# g# Y6 [# S# K+ y
+ V5 [( g6 n$ V9 e/ Y
to setup-plots+ v7 D( k; A$ y7 r+ G6 z
  set-current-plot "Class Plot"
3 J5 Z8 Q" v) M* L  set-plot-y-range 0 num-people
6 N2 Z1 v3 _% J2 _; Z* {  set-current-plot "Class Histogram"
$ y* c# d+ R& o; ?  set-plot-y-range 0 num-people
- V6 C1 ~; L+ ~  |% [end5 `: o9 f# m0 Q, K4 u, G

. }: n2 Y( n6 S* x% W* S9 V9 Rto update-plots( k$ v& _6 V8 B; ~
  update-class-plot1 H4 _6 G9 @  V% V$ J' W7 i' V+ w
  update-class-histogram
" v& S4 r1 F- O5 A6 ?  update-lorenz-and-gini-plots
/ q; r4 N: S' X% wend( l; J: U* n& ?) W+ r! l

- j9 v4 t) ^; V: Mto update-class-plot4 |. g: b4 j4 C1 `6 J- F9 W: @4 Z
  set-current-plot "Class Plot"
" p0 b5 ~9 [9 q2 d  set-current-plot-pen "low"
7 \1 C. H% ^: M  g; M, c  plot count turtles with [color = red]
4 s* F+ R/ w2 p* P. e  set-current-plot-pen "mid"6 C8 w* I1 m8 \8 _* N, c) m0 d$ v, ^
  plot count turtles with [color = yellow]; s" d  S" w; E' q
  set-current-plot-pen "up"6 x. _" \  F: j* U3 o
  plot count turtles with [color = green]# D- r3 X  G% {; J
end
. E. |9 b) Q* U  I
* P) z+ T8 v2 i7 o+ H1 ato update-class-histogram8 O& I% Y# \5 v) L9 @
  set-current-plot "Class Histogram"
4 V& P8 i- f3 ~% Z5 \  plot-pen-reset& F/ |/ c2 [3 D9 P
  set-plot-pen-color red3 @) u; h! t* u4 p  x& y! Q
  plot count turtles with [color = red]
; T, v* [4 d2 M) V  set-plot-pen-color yellow& d  P, b4 O; B+ @9 a/ {: `; a" z
  plot count turtles with [color = yellow]) Z( A4 s4 y; \0 D- d9 K; P9 n0 C4 h
  set-plot-pen-color green, T9 @6 k+ v8 t+ ?; V9 U' L9 |$ B
  plot count turtles with [color = green]
; I$ c5 b) s% Y7 u& {- |/ Eend
% _6 V' c+ g) z, v- q' v2 _to update-lorenz-and-gini-plots
$ ?0 x8 {+ A+ b7 u! `5 r6 u* \  set-current-plot "Lorenz Curve"
; J+ k# `/ Z8 W3 s, V" ~  clear-plot) s) O6 o: M" u+ D9 m( F5 O

1 B2 I' ~7 c0 J2 k9 `  set-current-plot-pen "equal"
1 S, T3 D0 N" m7 z) r6 R6 M' C" E; s  plot 0& X5 U% E" g* P+ O
  plot 100
1 v/ s7 }4 G, f) C& Q3 l" Z+ H! c/ Y- l- m2 v+ [3 r
  set-current-plot-pen "lorenz"; y1 j+ G! [" U7 O6 b
  set-plot-pen-interval 100 / num-people/ `; F' w7 [" r0 _/ ?
  plot 01 x- \; u2 T/ y: n+ Y. b% Z% V
: ]1 ?* V+ c5 O, Z# j: ~* L% u
  let sorted-wealths sort [wealth] of turtles
5 d! @5 j% f5 N1 z$ n  let total-wealth sum sorted-wealths/ j8 @: D* j) ^7 S( R  y$ c- z* Q" S
  let wealth-sum-so-far 0
0 u, F/ y/ B: j5 X; M  let index 0  T+ f3 B- K& o) ~
  let gini-index-reserve 0
& M( L4 s' L' S: }3 a& a; M, g; y% d# Y1 D" t" V5 U5 Q" @$ y
  repeat num-people [* J; R0 }2 H: D3 q/ i, ]7 }6 E: T5 j
    set wealth-sum-so-far (wealth-sum-so-far + item index sorted-wealths)6 ^; s+ c( I9 W4 @
    plot (wealth-sum-so-far / total-wealth) * 100$ z( G" f7 O1 L5 z4 d& I
    set index (index + 1)
9 A1 M& y. W4 P, Y# I    set gini-index-reserve
& E& [9 ^' ]0 W  q) F9 P3 a5 p      gini-index-reserve +
5 r3 t  W' F' V3 w5 ^6 {# \      (index / num-people) -
' i" C& n* p9 G6 \      (wealth-sum-so-far / total-wealth)0 A+ m& ~" l$ o5 x1 W: @+ S! |
  ]  O1 A3 z9 }) ~9 P

% u; ^4 k1 |( {  set-current-plot "Gini-Index v. Time"3 E3 \4 E" g& {
  plot (gini-index-reserve / num-people) / area-of-equality-triangle7 S6 F* d5 [! z5 \* S" |
end
. g  J5 P6 ]9 p6 T! E' Bto-report area-of-equality-triangle/ d; n* Q: `$ L( ~9 p5 T+ A  m  |; {
  report (num-people * (num-people - 1) / 2) / (num-people ^ 2)4 A; A, \) q( m' n" l
end
 楼主| 发表于 2008-5-4 15:49:14 | 显示全部楼层
自己写了用的hatch 但加在上面的程序中运行的时候总是出现问题T_T
您需要登录后才可以回帖 登录 | 注册

本版积分规则

QQ|Archiver|手机版|SimulWay 道于仿真   

GMT+8, 2026-4-27 23:15 , Processed in 0.018424 second(s), 15 queries .

Powered by Discuz! X3.4 Licensed

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表