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升级   33.68% TA的每日心情 | 开心 2012-2-21 11:21 |
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签到天数: 5 天 [LV.2]偶尔看看I
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本帖最后由 瞿培华 于 2012-2-18 17:26 编辑 % V T6 @: S3 `6 g. [5 J8 X
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global pop; %种群6 T; [5 y7 Z& p9 j$ h% @* q& B
global c1; %个体最优导向系数
9 m2 d$ m1 M @+ S, d& Y% xglobal c2; %全局最优导向系数: {( {- J; b3 f
global gbest_x; %全局最优解x轴坐标9 _& ^5 H) O3 ^5 u4 h/ x t
global gbest_y; %全局最优解y轴坐标: |( k# p% e6 W# T$ D# ?
global best_fitness; %最优解
8 Q- ^8 ]8 [0 D* r( h; h7 e$ l$ t2 y' @global best_in_history; %最优解变化轨迹/ o! l8 b5 J E& S+ a
global x_min; %x的下限# _4 E0 T7 X( Z
global x_max; %x的上限
/ X- F* R+ Z3 p! E5 i4 Lglobal y_min; %y的下限
5 |8 u/ ~7 t$ g3 H) l: n5 Xglobal y_max; %y的上限
0 E7 T6 D) U. i9 Nglobal gen; %迭代次数
4 ~. b u% @. ^. @% _global exetime; %当前迭代次数
$ G: m5 A/ X' L6 ~ \6 m# H8 {, m4 | vglobal max_velocity; %最大速度& @4 I* a1 D# S# a! ^
" k2 }* ?9 n8 M9 R: l7 `5 `$ f; Rinnitial; %初始化$ z& ~, E. V# r& m6 c# Y& a- k
+ C6 X( s: M: N- P& sfor exetime=1:gen
! s4 n. [$ k0 h9 a% `# ]& { outputdata; %实时输出结果0 _/ V5 N+ H) \6 g" F+ w
adapting; %计算适应值: ^6 p) c9 x/ r0 W- `% u4 ?
errorcompute(); %计算当前种群适值标准差
: X( o0 Q/ a0 c' i updatepop; %更新粒子位置% C+ P8 A$ H6 S7 g" D$ R+ ~
pause(0.01);
" r$ M" ~6 W; Jend; z% E* V8 E( [
" X; i* ?) F* F5 @3 }3 Aclear i;
: ^, g. Z5 A2 _$ U* R Kclear exetime;
/ O& a6 G; e$ c, H! pclear x_max;2 o% W! V6 x( V- k, N3 W/ t( A2 \
clear x_min;) i5 x7 B1 q3 d, R$ ?' H4 s
clear y_min; Z# X" ^, w: L9 R$ W$ ~% j
clear y_max;
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+ r# N) Q1 A7 i2 U) H8 k6 ]* u8 X5 c- N4 b+ {6 D3 x; h
; A4 R# s6 s* Z* S* h; A9 Tfor i=1:popsize
0 j/ {# C* w; P0 s pop(i,8)=100*(pop(i,1)^2-pop(i,2)^2+(1-pop(i,1))^2);5 z* ~& N/ h; i- \
if pop(i,7)>pop(i,8)3 A8 ] V) r$ d4 {# K* r
pop(i,7)=pop(i,8);
3 ^. T# N& {# t( X pop(i,5:6)=pop(i,1:2);+ ~4 U, c' @# D$ ~
end) ~* y8 h$ _6 t) o
end
* O6 W( l) Q7 U( K N2 u" k4 Dif best_fitness>min(pop(:,7))
/ ^7 B Q+ Q7 \6 _8 n/ G' n& ` best_fitness=min(pop(:,7));
. u8 q( j* K6 W5 B/ D gbest_x=pop(find(pop(:,7)==min(pop(:,7))),1);* e0 m x- m4 H2 B* v- W9 s7 y
gbest_y=pop(find(pop(:,7)==min(pop(:,7))),2);
; T# S% F) E$ r- ~end5 |5 _8 x8 N7 B, A8 `: g) Z$ i8 w
best_in_history(exetime)=best_fitness;2 M# K/ F' F. S; v# y2 q9 C& F* D. V
gen=100;
% M7 n, Y9 j0 n! Mpopsize=30;) l1 k' [' O d5 A* G* ?: T3 W3 w
best_in_history(gen)=inf;9 b% h. G3 D+ b: ^3 Q8 V7 \# a
best_in_history(: )=inf;
* a$ c, B, e6 hmax_velocity=0.3;
% R9 J6 w+ [4 H$ Ubest_fitness=inf;! R/ E0 C w1 s4 i2 x
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pop(popsize,8)=0;
" a" E. d& I; q8 @9 B8 ofor i=1:popsize G" e; j, m- ~9 P- d7 L8 ]
pop(i,1)=4*rand()-2;
! u* ? T! J# Z5 B pop(i,2)=4*rand()-2;
, ~+ P; T$ r) z: o pop(i,5)=pop(i,1);3 X/ H5 O' R$ Z* g- U. _
pop(i,6)=pop(i,2);
/ D- Q1 L" b8 }/ u" K" u- t& u0 U! Q pop(i,3)=rand()*0.02-0.01;
" e; ^! a+ G7 y: l0 b, X pop(i,4)=rand()*0.02-0.01;
9 L0 I3 R, A" x5 ?5 } pop(i,7)=inf;5 K* @2 j, P7 G& B- G# V& R7 H1 j, q
pop(i,8)=inf;% I1 \5 ]7 N l+ i3 z
end
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c1=2;
( [& r9 F! e7 p* K; {c2=2;
! W" o3 V: K+ u# U0 Y0 u) N1 Xx_min=-2;$ h" h8 A- {; r! C( [
y_min=-2;0 B" s% S0 P8 ^: ?' {
x_max=2;0 d# n ]* X! z- R1 h) F
y_max=2;" }% x6 Y" ~. Y! x1 N; u& E; f
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gbest_x=pop(1,1); C: P+ I F& ]- T
gbest_y=pop(1,2);' k2 `" @5 Y" h
subplot(1,2,1);
7 n+ Y% v1 t1 V& |, f A8 J* z3 tfor i=1:popsize
H" @. `& x5 F7 L' M2 {. i# j plot(pop(i,1),pop(i,2),'b*');. z1 N$ t8 P$ A- K7 p$ k. g
hold on;
2 n$ x( f: |: W9 m1 P Pend$ D) k; w: D4 W& w4 k* P' [) R
& d$ `7 ^4 }$ S' h. R$ g% Uplot(gbest_x,gbest_y,'r.','markersize',20);axis([-2,2,-2,2])4 H7 ^# L# U! V, s2 c* K: E5 A& k
hold off;* c: I2 x& \" T( q$ |! O+ j
subplot(1,2,2);: R/ p7 R# M* u' u3 Z$ F; q
axis([0,gen,-0.00005,0.00005]);
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& P7 G+ r# L& K* A1 U# f2 Lif exetime-1>0
) ~4 Y7 u; Y6 c& W: E J line([exetime-1,exetime],[best_in_history(exetime-1),best_fitness]);
* ^ `1 O4 a% m. i. ` hold on;
" @- X- K* Q& ~7 M$ R% I) Tend! B0 k, p; j# A, s# m; i
* i. k, h% X) Gfor i=1:popsize4 Z# `% y! t, J0 A7 E& z! M
pop(i,3)=rand()*pop(i,3)+c1*rand()*(pop(i,5)-pop(i,1))+c2*rand()*(gbest_x-pop(i,1));
) ^ n9 J: o8 \$ q$ j& n0 L8 ?9 B pop(i,4)=rand()*pop(i,4)+c1*rand()*(pop(i,6)-pop(i,2))+c2*rand()*(gbest_x-pop(i,2));
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if abs(pop(i,3))>max_velocity) `3 t3 ]* H. T
if pop(i,3)>0( F. n+ j2 o$ Y Z
pop(i,3)=max_velocity;
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pop(i,3)=-max_velocity;7 B4 b& R/ D0 y1 x: r ]2 F
end
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if abs(pop(i,4))>max_velocity, v0 J6 t- o- F
if pop(i,4)>0: L) Q: S3 g& s; ~/ G
pop(i,4)=max_velocity;- ]- W& K1 j& M) g/ Y4 h
else% }/ s6 u* n7 K, v! `
pop(i,4)=-max_velocity;+ S: \0 @; ^) z c
end
- H5 [# y' x& v) @, g end
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for i=1:popsize: u* q( a# `# i' u" E
pop(i,1)=pop(i,1)+pop(i,3);+ A- u/ J! s# ?% s3 O
pop(i,2)=pop(i,2)+pop(i,4);: ^4 b1 p9 V4 O Y/ A% H
end, T/ V; y. B; T+ t4 l5 W$ k
3 `6 }) ^6 B- ^# q& g: _1 p这是我的程序,但是运行结果老是出现:如下图
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