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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
% i1 _% N( f" _5 {6 q9 h
5 f$ A! n5 R3 a3 B, S' F0 |( Wglobal pop; %种群
4 `4 `3 W) [- {# p# H' j/ _. sglobal c1; %个体最优导向系数
, F" P C# u% q Y3 fglobal c2; %全局最优导向系数
4 c( [4 m, F% m; l& R% ?; sglobal gbest_x; %全局最优解x轴坐标- \! \- E* h2 D' ?! G
global gbest_y; %全局最优解y轴坐标
2 \7 g+ b) t6 p/ I+ q2 c, {$ {4 L$ lglobal best_fitness; %最优解& {2 c& m: d! U: q2 A+ J1 n
global best_in_history; %最优解变化轨迹3 d# B+ r' g/ L' v' C! {5 q
global x_min; %x的下限/ {# ?" t9 e! L* b
global x_max; %x的上限
! j& ], \: C0 Q" k( lglobal y_min; %y的下限
9 ~2 U( c" h2 X$ e/ N" Qglobal y_max; %y的上限1 q/ Z, l8 m( V5 g s+ o8 l
global gen; %迭代次数1 D/ a0 X2 G1 v# l. M/ c
global exetime; %当前迭代次数; s* R2 N3 y) H6 T+ |& T
global max_velocity; %最大速度
, g7 c5 \, e# a+ I6 Q. n, j# _5 _2 e8 D {! i \/ j
innitial; %初始化
- s9 Q- K# b# ^2 i3 y y# I% f7 v- w0 A& x0 t
for exetime=1:gen
# ^" C, b5 B3 H! N4 } outputdata; %实时输出结果
, [- B6 S } C adapting; %计算适应值
) B7 W5 b7 i7 ]# W5 v errorcompute(); %计算当前种群适值标准差
/ r3 E6 C8 Z' ` updatepop; %更新粒子位置( n2 `2 G- B0 }0 o
pause(0.01);+ x2 e8 n; p/ w, i/ R
end u: l. j9 t) u f. N' O; l
7 X7 C- Q; u" K8 S) R" w# fclear i;
/ f$ G! j1 h3 d6 j% D/ xclear exetime;
' j/ r; l. e: O6 H) q" P" y" yclear x_max;, F) e6 R- v4 G
clear x_min;
. ]) ^9 k$ ?7 zclear y_min;
6 u: f+ s+ e5 [- cclear y_max;
: _( f" {, C. J
' [$ w0 R, _: ?2 j# F, J# ]! A2 s; z3 J1 h( c" ]
8 \7 B" F g% w% [for i=1:popsize: g* {2 T( d$ F4 E' I
pop(i,8)=100*(pop(i,1)^2-pop(i,2)^2+(1-pop(i,1))^2);
4 e' ^" P0 J7 }: U# ^% ~ if pop(i,7)>pop(i,8)7 O1 q0 w h3 D$ q
pop(i,7)=pop(i,8);
% e, P" a+ D- ?; q7 h7 t( M pop(i,5:6)=pop(i,1:2);
7 E6 F r8 t& L) L5 d end8 P& p) t, N+ P' P" N' ?. a5 S5 g5 ?
end
+ ]: W9 r8 C( q% b, qif best_fitness>min(pop(:,7))
/ ?1 `/ O3 ]0 o7 v# u' ?2 { best_fitness=min(pop(:,7));
& k0 F9 t" L- E! f2 P- Q gbest_x=pop(find(pop(:,7)==min(pop(:,7))),1);
5 H, ^9 I: F" m$ f$ `' ~ gbest_y=pop(find(pop(:,7)==min(pop(:,7))),2);# Y( A E- ?5 o; n% L2 K f
end, |8 f9 }* a# O
best_in_history(exetime)=best_fitness;# n+ A2 C r5 p7 \2 G" W
gen=100;% v% L7 {6 ]/ A) B
popsize=30;: I, U S' h9 A* @3 q
best_in_history(gen)=inf;
7 x% L8 `* ^3 B1 t, h2 ]' wbest_in_history(: )=inf;
$ `9 }$ k4 y+ H4 [max_velocity=0.3;
) n! j. B" n. W! D: Mbest_fitness=inf;
- M5 J, \- F7 f, U/ y
9 m1 D" ]6 G9 y0 ~, rpop(popsize,8)=0;
- ~- A, M/ V6 T! j3 n& z$ Pfor i=1:popsize G# L* a7 X0 N3 ?+ x. { j
pop(i,1)=4*rand()-2;
) W5 J! y2 J- A$ k& b! f* k+ U pop(i,2)=4*rand()-2;
) V, f* |. I8 G( A f3 ~ pop(i,5)=pop(i,1);
4 i y* e2 m7 t4 v, I pop(i,6)=pop(i,2);" m6 \( k# _4 U# t! U1 L n
pop(i,3)=rand()*0.02-0.01;
4 p; ^- f# A, T- l E# l pop(i,4)=rand()*0.02-0.01;4 Z. H. E- I2 r7 v' u
pop(i,7)=inf;
+ {. m) p) C+ ?: l1 D Y3 n- B+ o pop(i,8)=inf;
! Y6 F# ~. f4 r: c0 l# u. rend/ |; P# p, S/ X2 T4 l) [+ N. P) I
0 _$ ?) v# e4 N% b1 b. L
c1=2;
7 v4 h0 S( p9 U' ?c2=2;' F2 h+ j; W* Q- b! l5 A+ S9 h
x_min=-2;- j7 v# T% t/ p& p _
y_min=-2;: ~8 _4 s! s# L( k; C7 [8 W
x_max=2;
6 y% i4 \- O; x1 \y_max=2;
( \7 ~: S% V/ w; \# {+ S: ?9 ~8 n
6 [3 c* w o# @2 K& Ngbest_x=pop(1,1);! v* }; N6 i/ j& J2 g
gbest_y=pop(1,2);, b& }0 a9 `9 C+ `9 Z
subplot(1,2,1);
. M, z8 S% t2 y4 i8 }8 T( v6 `for i=1:popsize- P1 j) n% J+ ^
plot(pop(i,1),pop(i,2),'b*');4 S8 t4 u4 E- d! Y5 u: z& x, M$ P
hold on;
+ Q1 p6 |7 P# {3 ?$ d- O& ^8 lend
& [+ H9 J' W: v* q, H3 f2 T' N' L8 V1 g. W# M' e
plot(gbest_x,gbest_y,'r.','markersize',20);axis([-2,2,-2,2])6 L6 Z* s! q2 a
hold off;! [0 U$ M$ ]+ S: o2 x- x
subplot(1,2,2);6 p9 J+ ?: r% h+ r
axis([0,gen,-0.00005,0.00005]);
; R! o" j" e3 w
! l& r. s" u& I- j1 p. Yif exetime-1>01 r4 F1 L5 b! `3 U5 Y8 k; A" ?
line([exetime-1,exetime],[best_in_history(exetime-1),best_fitness]);+ F9 v4 o- D, m, S8 ^' o3 d
hold on;6 W6 P" a3 d( X: W Q
end
$ Z( a! w3 G( g7 ?- R6 T* g/ Z) W5 o5 G
for i=1:popsize7 }' ^& V2 t$ m% Y8 t
pop(i,3)=rand()*pop(i,3)+c1*rand()*(pop(i,5)-pop(i,1))+c2*rand()*(gbest_x-pop(i,1));, Z& z. Y: C6 T) c1 r
pop(i,4)=rand()*pop(i,4)+c1*rand()*(pop(i,6)-pop(i,2))+c2*rand()*(gbest_x-pop(i,2));5 i& y: X) |8 n, A5 r3 A' y
* m! [* C7 v5 H8 x; h% K
if abs(pop(i,3))>max_velocity
) G8 M" e0 }1 o5 h0 D% V6 @: K if pop(i,3)>07 V( y3 u" X9 b5 c$ N. U+ x0 x, r3 l
pop(i,3)=max_velocity;
* w% L+ t: s( ]1 ^6 C# t6 r else4 S8 y, n2 N6 J! Q
pop(i,3)=-max_velocity;6 s! b% r2 M0 Z- V8 G3 {& \! K
end
$ d& j& @1 f( ?8 | end2 y+ x& q2 a1 ]1 g7 |! h6 u% ~
if abs(pop(i,4))>max_velocity
+ Q& k0 j' L7 _3 S- S; S if pop(i,4)>0
% T1 T* t+ \$ W( j pop(i,4)=max_velocity;: A5 k O; x8 ]
else
, p/ R+ s) K9 x( C7 p. W pop(i,4)=-max_velocity;
# a& d' ?& |+ u7 p7 ], J5 J end
" v8 K1 E w6 |+ ]( I2 H, p end' [" U/ ~; Q* G* O% | S
end
0 y" f* |! S a4 G2 ` 1 u- f2 n9 ~. W
for i=1:popsize
& Z: S; n- E8 {7 T6 F: | pop(i,1)=pop(i,1)+pop(i,3);
5 Z' c6 C0 r. ?4 ?; ?3 U7 P& ^ A0 ? b pop(i,2)=pop(i,2)+pop(i,4);
' s: U b- L9 P0 ^" bend% O9 A, h* x3 Z0 W
5 N, o3 s* c' A" B7 y6 ~5 C
这是我的程序,但是运行结果老是出现:如下图4 [. l" `5 }( V& I
0 r8 L3 j% i0 e+ M: Q7 d8 C6 n  3 z' q& G; i# P' N3 [% a9 n9 E
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