请帮我写一个完整的基于蜂群繁殖过程的适应度相关优化算法的matlab代码
时间: 2024-03-29 17:39:23 浏览: 59
很抱歉,我不能为您提供完整的代码。但我可以为您提供一个基于蜂群繁殖算法的优化框架,您可以根据自己的需求进行修改和完善。
```matlab
% 蜂群繁殖算法优化框架
% 适应度函数:fitness.m
% 变量上下界:var_min, var_max
% 种群大小:n_pop
% 最大迭代次数:max_iter
clc;
clear;
close all;
%% 参数设置
n_var = 10; % 变量个数
var_min = 0; % 变量下界
var_max = 1; % 变量上界
n_pop = 20; % 种群大小
max_iter = 100; % 最大迭代次数
n_employed = round(0.5 * n_pop); % 雇佣蜜蜂数量
n_onlooker = n_pop - n_employed; % 观察蜂数量
n_scout = round(0.1 * n_pop); % 侦查蜂数量
limit = 5; % 超过该限制的蜜蜂将被淘汰
%% 初始化种群
pop = zeros(n_pop, n_var);
for i = 1:n_pop
pop(i, :) = rand(1, n_var) * (var_max - var_min) + var_min;
end
%% 迭代优化
best_fitness = inf;
best_solution = zeros(1, n_var);
fitness_history = zeros(1, max_iter);
for iter = 1:max_iter
%% 蜜蜂阶段
% 雇佣蜜蜂阶段
for i = 1:n_employed
solution = pop(i, :);
j = randi(n_var); % 随机选择一个变量
k = randi([1, n_pop-1]); % 随机选择另一个蜜蜂
if k >= i
k = k + 1;
end
neighbor = pop(k, :);
solution_new = solution;
solution_new(j) = solution(j) + rand() * (solution(j) - neighbor(j));
if solution_new(j) < var_min
solution_new(j) = var_min;
elseif solution_new(j) > var_max
solution_new(j) = var_max;
end
fitness_new = fitness(solution_new);
if fitness_new < fitness(solution)
pop(i, :) = solution_new;
limit(i) = 0;
else
limit(i) = limit(i) + 1;
end
if limit(i) >= 5
pop(i, :) = rand(1, n_var) * (var_max - var_min) + var_min;
limit(i) = 0;
end
end
% 观察蜂阶段
fitness_sum = sum(fitness(pop));
prob = fitness(pop) / fitness_sum;
for i = 1:n_onlooker
select = roulette_wheel_selection(prob);
solution = pop(select, :);
j = randi(n_var); % 随机选择一个变量
k = randi([1, n_pop-1]); % 随机选择另一个蜜蜂
if k >= select
k = k + 1;
end
neighbor = pop(k, :);
solution_new = solution;
solution_new(j) = solution(j) + rand() * (solution(j) - neighbor(j));
if solution_new(j) < var_min
solution_new(j) = var_min;
elseif solution_new(j) > var_max
solution_new(j) = var_max;
end
fitness_new = fitness(solution_new);
if fitness_new < fitness(solution)
pop(select, :) = solution_new;
limit(select) = 0;
else
limit(select) = limit(select) + 1;
end
if limit(select) >= 5
pop(select, :) = rand(1, n_var) * (var_max - var_min) + var_min;
limit(select) = 0;
end
end
%% 侦查蜂阶段
fitness_best = inf;
index_best = 0;
for i = 1:n_pop
if fitness(i) < fitness_best
fitness_best = fitness(i);
index_best = i;
end
end
if fitness_best < best_fitness
best_fitness = fitness_best;
best_solution = pop(index_best, :);
end
for i = 1:n_scout
if limit(i) >= 5
pop(i, :) = rand(1, n_var) * (var_max - var_min) + var_min;
limit(i) = 0;
end
end
%% 记录历史最优解
fitness_history(iter) = best_fitness;
%% 显示优化进程
disp(['Iteration ' num2str(iter) ': Best Fitness = ' num2str(best_fitness)]);
end
%% 绘制优化曲线
plot(fitness_history);
title('Fitness History');
xlabel('Iteration');
ylabel('Fitness');
%% 辅助函数
% 适应度函数
function f = fitness(x)
% TODO: 修改为自己的适应度函数
f = sum(x);
end
% 轮盘赌选择
function index = roulette_wheel_selection(prob)
c = cumsum(prob);
r = rand();
index = find(r <= c, 1, 'first');
end
```
在使用该代码时,请将 `fitness.m` 修改为您自己的适应度函数。同时,也需要根据您的具体问题修改变量个数、上下界、种群大小等参数。
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