求大神可以用matlab帮我优化车辆路径!
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解决时间 2021-01-03 20:08
- 提问者网友:遮云壑
- 2021-01-03 01:58
做毕设,老师要求用蚁群算法基于MATLAB语言优化车辆路径,完全不懂啊,求大神帮助,详情QQ4 3 7 2 0 5 2
最佳答案
- 五星知识达人网友:三千妖杀
- 2021-01-03 02:31
你的节点信息呢
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- 1楼网友:廢物販賣機
- 2021-01-03 03:59
clear;
clc;
close all;
n=10000;
tic;
ye=10*rand(1,n);
ys=10*rand(1,n);
num = 0 ;
for i=1:n
if( ys(i) > ye(i) )
temp = ys(i) ;
ys(i) = ye(i) ;
ye(i) = temp ;
end
end
for i=1:n
for j=(i+1):n
yij_e=min(ye(i),ye(j));
yij_s=max(ys(i),ys(j));
if( yij_e <= yij_s ) % i,j投影不重叠, 三条直线必然两两可见
num = num + n - j ;
else
for k=(j+1):n
if( yij_s >= ye(k) || yij_e <= ys(k) ) % i,j的重叠投影与k不重叠, 三条直线两两可见
num = num + 1 ;
end
end
end
end
end
rate=num/n/(n-1)/(n-2);
inf=sprintf('num=%d, rate=%f',num,rate);
disp(inf)
toc;matlab,实测35分钟,你还可以用matlab并行,估计能更快,但是优化空间有限
#include
#include
#include
#include
#include
int main()
{
const int n=10000;
unsigned int ye[n], ys[n];
time_t t;
time(&t);
srand(t);
time_t t1 = clock() ;
unsigned int tempi ;
for( int i = 0 ; i < n ; ++ i )
{
ye[i] = rand() ;
ys[i] = rand() ;
if( ys[i] > ye[i] )
{
tempi = ys[i] ;
ys[i] = ye[i] ;
ye[i] = tempi ;
}
}
double num = 0.0 ;
for( int i = 0 ; i < n ; ++ i )
{
for( int j = i+1 ; j < n ; ++ j )
{
unsigned int yij_e=__min(ye[i],ye[j]);
unsigned int yij_s=__max(ys[i],ys[j]);
if( yij_e <= yij_s ) // i,j投影不重叠, 三条直线必然两两可见
num += double(n - j - 1) ;
else
{
for( int k = j+1 ; k < n ; ++ k )
if( yij_s >= ye[k] || yij_e <= ys[k] ) // i,j的重叠投影与k不重叠, 三条直线两两可见
num += 1.0 ;
}
}
}
double rate = num/double(n)/double(n-1)/double(n-2);
time_t t2 = clock() ;
double t_cost = double(t2-t1)/1000.0/60.0 ;
printf("num=%0.lf, rate=%lf, cost=%lf",num,rate,t_cost);
return 0;
}c/c++,实测6.7分钟
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