MATLAB 原子搜索算法实现及示例代码
以下是用 MATLAB 实现原子搜索算法的示例代码:
% 原子搜索算法
function [bestSolution, bestFitness] = atomicSearch(nAtoms, nIterations, lb, ub, fitnessFunc)
% 初始化原子群
atoms = initializeAtoms(nAtoms, lb, ub);
% 计算初始适应度
fitness = zeros(nAtoms, 1);
for i = 1:nAtoms
fitness(i) = fitnessFunc(atoms(i, :));
end
% 寻找最佳适应度和最佳解
[bestFitness, bestIdx] = min(fitness);
bestSolution = atoms(bestIdx, :);
% 迭代搜索
for iteration = 1:nIterations
% 更新原子位置
atoms = updateAtoms(atoms, bestSolution, lb, ub);
% 计算适应度
for i = 1:nAtoms
fitness(i) = fitnessFunc(atoms(i, :));
end
% 更新最佳解
[currentBestFitness, currentBestIdx] = min(fitness);
if currentBestFitness < bestFitness
bestFitness = currentBestFitness;
bestSolution = atoms(currentBestIdx, :);
end
end
end
% 初始化原子群
function atoms = initializeAtoms(nAtoms, lb, ub)
nVariables = numel(lb);
atoms = zeros(nAtoms, nVariables);
for i = 1:nAtoms
atoms(i, :) = lb + (ub - lb) .* rand(1, nVariables);
end
end
% 更新原子位置
function newAtoms = updateAtoms(atoms, bestSolution, lb, ub)
nAtoms = size(atoms, 1);
nVariables = size(atoms, 2);
newAtoms = zeros(nAtoms, nVariables);
for i = 1:nAtoms
r1 = rand(1, nVariables);
r2 = rand(1, nVariables);
newAtoms(i, :) = atoms(i, :) + r1 .* (bestSolution - atoms(i, :)) + r2 .* (lb - ub);
newAtoms(i, :) = max(newAtoms(i, :), lb);
newAtoms(i, :) = min(newAtoms(i, :), ub);
end
end
使用示例:
% 定义适应度函数
fitnessFunc = @(x) sum(x .^ 2);
% 设置算法参数
NAtoms = 50; % 原子数量
NIterations = 100; % 迭代次数
lb = -10; % 解的下界
ub = 10; % 解的上界
% 运行原子搜索算法
[bestSolution, bestFitness] = atomicSearch(nAtoms, nIterations, lb, ub, fitnessFunc);
% 显示结果
disp(['Best Solution: ' num2str(bestSolution)]);
disp(['Best Fitness: ' num2str(bestFitness)]);
这个示例实现了一个简单的原子搜索算法,并使用了一个简单的适应度函数进行测试。你可以根据自己的需求修改适应度函数和算法参数来完成你的任务。
注意: 以上代码示例仅供参考,你可以根据实际情况进行修改和扩展。
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