邦邦,希望有人解答一下,只有原码也行,求帮助!!_(:з」∠)_
此回答来自chatGPT,希望对您有所帮助,以下是一个简单的蜂群算法路径规划的 Matlab 原码,适用于栅格地图:matlab% 蜂群算法路径规划% 适用于栅格地图% 初始化参数num_ants = 50; % 蚂蚁数量num_iterations = 100; % 迭代次数alpha = 1; % 信息素重要程度因子beta = 5; % 启发式因子rho = 0.5; % 信息素挥发因子Q = 100; % 信息素增加强度因子num_nodes = size(map,1)*size(map,2); % 节点数量pheromone = ones(num_nodes,num_nodes); % 初始化信息素矩阵visibility = 1./map(:); % 初始化启发式因子矩阵visibility(isinf(visibility)) = 0; % 处理障碍物% 开始迭代for iter = 1:num_iterations % 初始化蚂蚁位置 ant_pos = ceil(rand(num_ants,1)*num_nodes); % 初始化路径长度 path_length = zeros(num_ants,1); % 开始移动 for step = 1:num_nodes-1 % 计算下一步可行的节点 current_node = ant_pos(:,step); feasible_nodes = find(map(current_node,:)==0); % 计算下一步的概率 prob = pheromone(current_node,feasible_nodes).^alpha .* visibility(feasible_nodes).^beta; prob = prob./sum(prob); % 选择下一步 next_node = zeros(num_ants,1); for ant = 1:num_ants next_node(ant) = randsample(feasible_nodes,1,true,prob); end % 更新路径长度 path_length = path_length + sqrt(sum((pos(current_node,:)-pos(next_node,:)).^2,2)); % 更新信息素 for ant = 1:num_ants pheromone(current_node(ant),next_node(ant)) = pheromone(current_node(ant),next_node(ant)) + Q/path_length(ant); end % 更新蚂蚁位置 ant_pos(:,step+1) = next_node; end % 更新信息素 pheromone = (1-rho)*pheromone;end% 找到最短路径path_length = zeros(num_ants,1);for ant = 1:num_ants path_length(ant) = sum(sqrt(sum((pos(ant_pos(ant,1:end-1),:)-pos(ant_pos(ant,2:end),:)).^2,2)));end[~,best_ant] = min(path_length);best_path = ant_pos(best_ant,:);
其中,map
是一个二维矩阵,表示栅格地图,其中 0 表示可行区域,1 表示障碍物。pos
是一个二维矩阵,表示每个节点的坐标。best_path
是最短路径,表示为节点的编号。
该回答引用于ChatGPT:
这里是一个简单的栅格地图路径规划示例,使用蜂群算法并使用MATLAB编写。在这个示例中,我们假设机器人只能朝上、下、左和右四个方向移动,每个格子的代价为1,起点为(1, 1),终点为(10, 10)。
function [path, cost] = bee_colony_path_planning(map, start_pos, end_pos, varargin)
% 栅格地图路径规划示例Bee Colony Algorithm
% 参数解析
p = inputParser;
addOptional(p, 'num_bees', 10, @isnumeric);
addOptional(p, 'max_iter', 1000, @isnumeric);
addOptional(p, 'num_elite_sites', 3, @isnumeric);
addOptional(p, 'num_best_sites', 5, @isnumeric);
addOptional(p, 'num_new_sites', 2, @isnumeric);
addOptional(p, 'patch_size', 2, @isnumeric);
addOptional(p, 'max_attempts', 100, @isnumeric);
parse(p, varargin{:});
% 初始化参数
num_bees = p.Results.num_bees; % 蜜蜂数量
max_iter = p.Results.max_iter; % 最大迭代次数
num_elite_sites = p.Results.num_elite_sites; % 精英站点数量
num_best_sites = p.Results.num_best_sites; % 最佳站点数量
num_new_sites = p.Results.num_new_sites; % 新站点数量
patch_size = p.Results.patch_size; % 邻域大小
max_attempts = p.Results.max_attempts; % 最大尝试次数
% 初始化蜜蜂
bees.pos = repmat(start_pos, num_bees, 1); % 初始位置
bees.cost = inf(num_bees, 1); % 初始代价
bees.best_pos = repmat(start_pos, num_bees, 1); % 最佳位置
bees.best_cost = inf(num_bees, 1); % 最佳代价
% 迭代搜索
for iter = 1:max_iter
% 计算每个蜜蜂的代价
for i = 1:num_bees
bees.cost(i) = astar_search(map, bees.pos(i,:), end_pos);
if bees.cost(i) < bees.best_cost(i)
bees.best_pos(i,:) = bees.pos(i,:);
bees.best_cost(i,:) = bees.cost(i,:);
end
end
% 精英选择
[best_costs, best_idx] = sort(bees.best_cost);
elite_sites.pos = bees.best_pos(best_idx(1:num_elite_sites),:);
elite_sites.cost = best_costs(1:num_elite_sites);
% 最佳选择
[sorted_costs, sorted_idx] = sort(bees.cost);
best_sites.pos = bees.pos(sorted_idx(1:num_best_sites),:);
best_sites.cost = sorted_costs(1:num_best_sites);
% 新站点选择
new_pos = zeros(num_new_sites,2);
for i = 1:num_new_sites
attempts = 0;
while attempts < max_attempts
idx = randi(num_bees);
neighbor_pos = bees.pos(idx,:) + round(patch_size*(rand(1,2)-0.5));
if all(neighbor_pos >= 1) && all(neighbor_pos <= size(map)) && ~isinf(map(neighbor_pos(1),neighbor_pos(2)))
new_pos(i,:) = neighbor_pos;
break;
end
attempts = attempts + 1;
end
end
new_cost = astar_search(map, new_pos, end_pos);
new_sites.pos = new_pos;
new_sites.cost = new_cost;
% 合并站点
all_sites.pos = [elite_sites.pos; best_sites.pos; new_sites.pos];
all_sites.cost = [elite_sites.cost; best_sites.cost; new_sites.cost];
% 计算每个蜜蜂的下一个位置
for i = 1:num_bees
site_idx = randi(size(all_sites.pos,1));
site_pos = all_sites.pos(site_idx,:);
bees.pos(i,:) = site_pos + round(patch_size*(rand(1,2)-0.5));
if any(bees.pos(i,:) < 1) || any(bees.pos(i,:) > size(map)) || isinf(map(bees.pos(i,1),bees.pos(i,2)))
bees.pos(i,:) = start_pos;
end
end
end
% 找到最佳路径
[~, idx] = min(bees.best_cost);
pos = bees.best_pos(idx,:);
% 寻找路径
path = [];
current_pos = pos;
while ~isequal(current_pos, start_pos)
path = [current_pos; path];
current_pos_idx = find(all(bsxfun(@eq, bees.best_pos, current_pos), 2));
current_pos = bees.pos(current_pos_idx(1),:);
end
path = [start_pos; path];
% 计算路径代价
cost = astar_search(map, path, end_pos);
该回答引用ChatGPT
蜂群算法是一种模拟蜜蜂族群觅食行为的优化算法,用于解决各种优化问题,其中包括路径规划。在栅格地图中,我们可以将每个栅格作为一个节点,建立节点之间的连接关系,然后使用蜂群算法进行路径规划。
以下是使用MATLAB实现蜂群算法路径规划的简单示例。
首先,我们需要读取地图文件,并将其转换为节点表示法。假设我们有一个10x10的地图文件"map.txt",其中"0"表示障碍物,"1"表示通行区域:
matlab
map = load('map.txt'); % 读取地图文件
[nr, nc] = size(map); % 获取地图尺寸
nodes = []; % 存储节点
% 将地图转换为节点表示法,并存储所有节点
for r = 1:nr
for c = 1:nc
% 如果当前位置是障碍物,则跳过
if map(r, c) == 0
continue
end
% 创建当前节点,并记录其相邻节点
node = struct('row', r, 'col', c, 'neighbors', []);
if r > 1 && map(r-1, c) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r-1, c)];
end
if r < nr && map(r+1, c) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r+1, c)];
end
if c > 1 && map(r, c-1) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r, c-1)];
end
if c < nc && map(r, c+1) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r, c+1)];
end
nodes = [nodes, node];
end
end
接下来,我们定义蜂群算法的参数,并初始化一个种群。种群中每个个体代表一条路径。
matlab
num_ants = 50; % 蚂蚁数量
alpha = 1; % 信息启发因子
beta = 5; % 距离启发因子
rho = 0.1; % 信息素挥发因子
Q = 1; % 信息素强度
num_iterations = 1000; % 迭代次数
% 初始化信息素矩阵和距离矩阵
pheromone = ones(length(nodes));
for i = 1:length(nodes)
for j = nodes(i).neighbors
distance = sqrt((nodes(i).row - nodes(j).row)^2 + (nodes(i).col - nodes(j).col)^2);
pheromone(i, j) = 1 / distance;
pheromone(j, i) = 1 / distance;
end
end
% 初始化种群
population = cell(num_ants, 1);
for i = 1:num_ants
population{i} = randperm(length(nodes));
end
接下来,我们开始迭代蜂群算法。首先,每个蚂蚁根据当前信息素和距离信息选择下一个节点。然后,每条路径的信息素强度进行更新。最后,选择一条最优路径作为解。
matlab
% 开始迭代
best_path = [];
best_cost = Inf;
for iter = 1:num_iterations
% 每个蚂蚁依次选择下一个节点
for i = 1:num_ants
current_node = population{i}(end); % 当前节点
unvisited_nodes = setdiff(1:length(nodes), population{i}); % 未访问节点
probabilities = zeros(size(unvisited_nodes)); % 节点选择概率
for j = 1:length(unvisited_nodes)
node = unvisited_nodes(j);
pheromone_factor = pheromone(current_node, node)^alpha;
distance_factor = 1 / sqrt((nodes(current_node).row - nodes(node).row)^2 + (nodes(current_node).col - nodes(node).col)^2)^beta;
probabilities(j) = pheromone_factor * distance_factor;
end
probabilities = probabilities / sum(probabilities);
next_node = randsample(unvisited_nodes, 1, true, probabilities); % 根据选择概率随机选择下一个节点
population{i} = [population{i}, next_node]; % 记录路径
end
% 更新信息素
delta_pheromone = zeros(size(pheromone));
for i = 1:num_ants
path = population{i};
path_cost = 0;
for j = 1:length(path)-1
delta_pheromone(path(j), path(j+1)) = delta_pheromone(path(j), path(j+1)) + Q;
path_cost = path_cost + sqrt((nodes(path(j)).row - nodes(path(j+1)).row)^2 + (nodes(path(j)).col - nodes(path(j+1)).col)^2);
end
if path_cost < best_cost
best_cost = path_cost;
best_path = path;
end
end
pheromone = (1-rho) * pheromone + delta_pheromone;
end
最后,我们可以将结果可视化。下面是一个简单的可视化函数(需要使用MATLAB的Image Processing Toolbox):
matlab
function visualize_map(map, nodes, path)
[nr, nc] = size(map);
img = repmat(map, [1, 1, 3]); % 转换为RGB图像
img = imresize(img, 10); % 放大显示
img = padarray(img, [10 10], 1, 'both'); % 加边框
for i = 1:length(nodes)
[r,c] = ind2sub([nr, nc], i);
if map(r, c) == 0
img(10+(r-1)*10:10+r*10-1, 10+(c-1)*10:10+c*10-1, :) = 0; % 障碍物变成黑色
elseif any(i==path)
img(10+(r-1)*10:10+r*10-1, 10+(c-1)*10:10+c*10-1, :) = [1, 0.7, 0.7]; % 路径变成红色
end
end
imshow(img);
end
我们可以将所有代码整合起来,得到完整的MATLAB程序:
matlab
map = load('map.txt'); % 读取地图文件
[nr, nc] = size(map); % 获取地图尺寸
nodes = []; % 存储节点
% 将地图转换为节点表示法,并存储所有节点
for r = 1:nr
for c = 1:nc
% 如果当前位置是障碍物,则跳过
if map(r, c) == 0
continue
end
% 创建当前节点,并记录其相邻节点
node = struct('row', r, 'col', c, 'neighbors', []);
if r > 1 && map(r-1, c) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r-1, c)];
end
if r < nr && map(r+1, c) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r+1, c)];
end
if c > 1 && map(r, c-1) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r, c-1)];
end
if c < nc && map(r, c+1) == 1
node.neighbors = [node.neighbors, sub2ind([nr, nc], r, c+1)];
end
nodes = [nodes, node];
end
end
num_ants = 50; % 蚂蚁数量
alpha = 1; % 信息启发因子
beta = 5; % 距离启发因子
rho = 0.1; % 信息素挥发因子
Q = 1; % 信息素强度
num_iterations = 1000; % 迭代次数
% 初始化信息素矩阵和距离矩阵
pheromone = ones(length(nodes));
for i = 1:length(nodes)
for j = nodes(i).neighbors
distance = sqrt((nodes(i).row - nodes(j).row)^2 + (nodes(i).col - nodes(j).col)^2);
pheromone(i, j) = 1 / distance;
pheromone(j, i) = 1 / distance;
end
end
% 初始化种群
population = cell(num_ants, 1);
for i = 1:num_ants
population{i} = randperm(length(nodes));
end
% 开始迭代
best_path = [];
best_cost = Inf;
for iter = 1:num_iterations
% 每个蚂蚁依次选择下一个节点
for i = 1:num_ants
current_node = population{i}(end); % 当前节点
unvisited_nodes = setdiff(1:length(nodes), population{i}); % 未访问节点
probabilities = zeros(size(unvisited_nodes)); % 节点选择概率
for j = 1:length(unvisited_nodes)
node = unvisited_nodes(j);
pheromone_factor = pheromone(current_node, node)^alpha;
distance_factor = 1 / sqrt((nodes(current_node).row - nodes(node).row)^2 + (nodes(current_node).col - nodes(node).col)^2)^beta;
probabilities(j) = pheromone_factor * distance_factor;
end
probabilities = probabilities / sum(probabilities);
next_node = randsample(unvisited_nodes, 1, true, probabilities); % 根据选择概率随机选择下一个节点
population{i} = [population{i}, next_node]; % 记录路径
end
% 更新信息素
delta_pheromone = zeros(size(pheromone));
for i = 1:num_ants
path = population{i};
path_cost = 0;
for j = 1:length(path)-1
delta_pheromone(path(j), path(j+1)) = delta_pheromone(path(j), path(j+1)) + Q;
path_cost = path_cost + sqrt((nodes(path(j)).row - nodes(path(j+1)).row)^2 + (nodes(path(j)).col - nodes(path(j+1)).col)^2);
end
if path_cost < best_cost
best_cost = path_cost;
best_path = path;
end
end
pheromone = (1-rho) * pheromone + delta_pheromone;
end
visualize_map(map, nodes, best_path);
该程序可以读取地图文件,并使用蜂群算法进行路径规划。路径规划结果可以通过调用visualize_map
函数进行可视化:
matlab
visualize_map(map, nodes, best_path);
蜂群算法(Artificial Bee Colony, ABC)是一种启发式优化算法,受自然界蜜蜂觅食行为的启发。在路径规划问题中,蜂群算法可以被用于寻找栅格地图上的最优路径。
以下是一个简单的 MATLAB 代码示例,用于在栅格地图上进行路径规划。请注意,这个示例可能不适用于所有情况,您可能需要根据实际问题修改或优化代码。
% 初始化参数
map_size = 100;
num_bees = 50;
num_iterations = 100;
start_point = [1, 1];
end_point = [100, 100];
% 创建障碍物栅格地图
map = zeros(map_size, map_size);
map(randi([1, map_size], [1, 20]), randi([1, map_size], [1, 20])) = 1;
% 初始化蜜蜂位置
bees = randi([1, map_size], num_bees, 2);
% 蜂群算法
for iter = 1:num_iterations
% 计算适应度函数
fitness = zeros(num_bees, 1);
for i = 1:num_bees
fitness(i) = sqrt(sum((bees(i, :) - end_point).^2));
end
% 按适应度排序
[~, idx] = sort(fitness);
bees = bees(idx, :);
% 对于前 10% 的蜜蜂,按概率更新位置
for i = 1:ceil(0.1 * num_bees)
prob = rand;
if prob < 0.6
bees(i, :) = bees(i, :) + randi([-1, 1], 1, 2);
elseif prob < 0.9
bees(i, :) = bees(i, :) + randi([-2, 2], 1, 2);
else
bees(i, :) = bees(i, :) + randi([-3, 3], 1, 2);
end
end
% 限制蜜蜂在地图范围内
bees = max(min(bees, map_size), 1);
% 检查是否找到解决方案
if any(all(bsxfun(@eq, bees, end_point), 2))
disp('找到解决方案');
break;
end
end
% 绘制结果
imagesc(map);
colormap gray;
hold on;
plot(bees(:, 2), bees(:, 1), 'ro');
plot(start_point(2), start_point(1), 'go');
plot(end_point(2), end_point(1), 'bo');
hold off;
我这边有,之前参加大学生数学建模,朋友你si信lian系下我吧,记得采纳谢谢啦
蜂群算法的代码吗?
基于new Bing和ChatGPT的回答:
以下是一个基于栅格地图的蜂群算法路径规划的MATLAB代码
% 栅格地图
map = [1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1;
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1];
% 蜜蜂数量
n = 10;
% 迭代次数
max_iter = 100;
% 路径长度
path_length = zeros(n,1);
% 路径
path = zeros(n,size(map,1)*size(map,2));
% 初始化蜜蜂位置
positions = zeros(n,2);
for i=1:n
positions(i,:) = [randi([2 size(map,1)-1]), randi([2 size(map,2)-1])];
end
% 迭代
for iter=1:max_iter
% 计算路径长度
for i=1:n
path_length(i) = calc_path_length(positions(i,:), map);
end
% 找到最短路径
[min_length, min_index] = min(path_length);
% 更新全局最优路径
if iter == 1 || min_length < global_min_length
global_min_length = min_length;
global_min_path = path(min_index,:);
end
% 更新路径
path(min_index,:) = calc_path(positions(min_index,:), map);
% 更新蜜蜂位置
for i=1:n
if i == min_index
continue;
end
new_position = update_position(positions(i,:), path(min_index,:), map);
if calc_path_length(new_position, map) < path_length(i)
positions(i,:) = new_position;
end
end
end
% 绘图
figure;
hold on;
axis equal;
axis off;
for i=1:size(map,1)
for j=1:size(map,2)
if map(i,j) == 1
rectangle('Position', [j-1, size(map,1)-i, 1, 1], 'FaceColor', 'k');
end
end
end
plot(global_min_path(:,2)-1, size(map,1)-global_min_path(:,1), 'r', 'LineWidth', 2);
scatter(positions(:,2)-1, size(map,1)-positions(:,1), 'b', 'filled');
scatter(positions(min_index,2)-1, size(map,1)-positions(min_index,1), 'r', 'filled');
% 计算路径长度
function length = calc_path_length(position, map)
path = calc_path(position, map);
length = size(path,1);
end
% 计算路径
function path = calc_path(position, map)
path = zeros(size(map,1)*size(map,2), 2);
path(1,:) = position;
index = 2;
while true
new_position = update_position(position, path(1:index-1,:), map);
if isequal(new_position, path(index-1,:))
break;
end
path(index,:) = new_position;
index = index + 1;
end
path = path(1:index-1,:);
end
% 更新蜜蜂位置
function new_position = update_position(position, path, map)
directions = [-1 0; 1 0; 0 -1; 0 1];
possible_positions = repmat(position, 4, 1) + directions;
possible_positions = possible_positions(~ismember(possible_positions, path, 'rows') & ~ismember(possible_positions, path(end,:), 'rows') & ~ismember(possible_positions, [0 0], 'rows'), :);
possible_positions = possible_positions(possible_positions(:,1)>=2 & possible_positions(:,1)<=size(map,1)-1 & possible_positions(:,2)>=2 & possible_positions(:,2)<=size(map,2)-1, :);
possible_positions = possible_positions(map(sub2ind(size(map), possible_positions(:,1), possible_positions(:,2)))==0,:);
if isempty(possible_positions)
new_position = path(end,:);
else
new_position = possible_positions(randi(size(possible_positions,1)),:);
end
end
引用chatGPT作答,以下是一个基于蜂群算法的路径规划的MATLAB代码示例,适用于栅格地图:
%% 初始化地图和参数
clear
clc
map = [0 0 0 0 0 0 0 0;
0 0 0 0 0 0 0 0;
0 0 0 0 1 0 0 0;
0 0 0 0 1 0 0 0;
0 0 0 0 1 0 0 0;
0 0 0 0 0 0 0 0;
0 0 0 0 0 0 0 0;
0 0 0 0 0 0 0 0];
start_point = [1,1];
end_point = [8,8];
max_iter = 100;
num_bees = 10;
num_sites = 5;
%% 初始化蜜蜂和食物源
sites = repmat(start_point,num_sites,1) + rand(num_sites,2)*7;
bees = repmat(sites(1,:),num_bees,1) + rand(num_bees,2)*0.1;
%% 开始蜜蜂搜索
best_path = [];
for iter = 1:max_iter
% 计算每个蜜蜂到所有食物源的距离
distances = pdist2(bees,sites,'euclidean');
% 选择每个蜜蜂的目标食物源
[~,ind] = min(distances,[],2);
% 更新蜜蜂位置
for i = 1:num_bees
new_bee = bees(i,:) + rand(1,2).*(sites(ind(i),:)-bees(i,:));
if isValidMove(map,bees(i,:),new_bee)
bees(i,:) = new_bee;
end
end
% 评估每个食物源的质量
quality = zeros(num_sites,1);
for i = 1:num_sites
quality(i) = sum(pdist2(bees,sites(i,:),'euclidean'));
end
% 选择最优的食物源
[min_quality,min_ind] = min(quality);
best_site = sites(min_ind,:);
% 更新食物源位置
new_site = best_site + rand(1,2).*((rand(1,2)<0.5).*2-1).*0.1;
if isValidMove(map,best_site,new_site)
sites(min_ind,:) = new_site;
end
% 记录最优路径
if isempty(best_path) || min_quality < best_path(end,end)
best_path = findPath(map,start_point,best_site);
end
% 显示搜索进度
disp(['Iteration ',num2str(iter),' - Best path length: ',num2str(min_quality)]);
plotPath(map,best_path);
pause(0.1);
end
%% 显示最优路径
plotPath(map,best_path);
disp(['Best path length: ',num2str(best_path(end,end))]);
%% 辅助函数
function [valid] = isValidMove(map,from,to)
% 检查移动是否合法
valid = false;
% 判断是否越界
if to(1) < 1 || to(1) > size(map,1) || to(2) < 1 || to(2) > size(map,2)
return;
end
% 判断是否撞墙
if map(to(1),to(2)) == 1
return;
end
% 判断是否斜着走
if from(1) ~= to(1) && from(2) ~= to(2)
return;
end
% 如果通过了以上所有检查,移动是合法的
valid = true;
end
function [path] = findPath(map,start_point,end_point)
% 使用A*算法寻找最短路径
% 参考:https://ww2.mathworks.cn/help/nav/ref/astarpath.html
costmap = robotics.BinaryOccupancyGrid(map);
planner = robotics.PRM;
planner.Map = costmap;
planner.NumNodes = 100;
start_location = [start_point(2),start_point(1)];
end_location = [end_point(2),end_point(1)];
path = planner.plan(start_location,end_location);
end
function [] = plotPath(map,path)
% 显示地图和路径
figure(1);
clf;
imshow(map);
hold on;
if ~isempty(path)
plot(path(:,2),path(:,1),'r-','LineWidth',2);
end
hold off;
end
此代码使用了蜂群算法来搜索最短路径,并使用A*算法来评估路径质量。在搜索期间,每只蜜蜂根据其当前位置和距离每个食物源的距离选择其目标食物源。然后,蜜蜂沿着最短路径朝着其目标移动。搜索期间还会更新食物源的位置以更好地吸引蜜蜂。最后,代码将显示地图和最优路径。
这里是一段使用蜂群算法进行路径规划的Matlab代码,适用于栅格地图。
以下内容部分参考ChatGPT模型:
首先,蜂群算法是一种优化算法,用于解决路径规划问题。在栅格地图中,我们可以将地图划分为一个个小方格,每个方格代表一个状态,例如障碍物、空地等。蜂群算法根据这些状态来进行路径规划。
以下是一个简单的蜂群算法路径规划matlab代码,仅供参考:
function [best_path, best_cost] = bee_colony_algorithm(map, start_pos, end_pos, max_iter, num_bees, num_sites, max_runs, max_unimproved)
% map: 栅格地图
% start_pos: 起点位置
% end_pos: 终点位置
% max_iter: 最大迭代次数
% num_bees: 蜜蜂数量
% num_sites: 蜜蜂巢数目
% max_runs: 最大运行次数
% max_unimproved: 最大连续不改善次数
% 初始化蜜蜂巢
sites = init_sites(num_sites, map, start_pos, end_pos);
% 初始化最优路径
best_path = [];
best_cost = Inf;
% 开始迭代
for iter = 1:max_iter
% 派遣蜜蜂
for i = 1:num_bees
% 选择一个蜜蜂巢
site = sites(randi(num_sites));
% 搜寻新的解
new_path = search_new_path(site.path, map, start_pos, end_pos);
% 更新蜜蜂巢
site = update_site(site, new_path);
% 记录最优解
if site.cost < best_cost
best_path = site.path;
best_cost = site.cost;
end
end
% 停止条件
if iter > max_runs || max_unimproved == 0
break;
end
% 工蜂阶段
for i = 1:num_sites
% 选择一个工蜂
bee = sites(i).bees(randi(num_bees));
% 搜寻新的解
new_path = search_new_path(bee.path, map, start_pos, end_pos);
% 更新工蜂的路径
bee.path = new_path;
bee.cost = calc_path_cost(new_path, map);
% 判断是否改善
if bee.cost < sites(i).cost
sites(i).path = bee.path;
sites(i).cost = bee.cost;
sites(i).unimproved = 0;
% 记录最优解
if bee.cost < best_cost
best_path = bee.path;
best_cost = bee.cost;
end
else
sites(i).unimproved = sites(i).unimproved + 1;
end
% 判断是否连续不改善过多
if sites(i).unimproved > max_unimproved
% 重新初始化蜜蜂巢
sites(i) = init_site(map, start_pos, end_pos);
end
end
% 纤细化阶段
sites = refine_sites(sites, map, start_pos, end_pos);
end
end
function sites = init_sites(num_sites, map, start_pos, end_pos)
% 初始化蜜蜂巢
sites = struct('path', {}, 'cost', {}, 'unimproved', {}, 'bees', {});
for i = 1:num_sites
site = struct();
site.path = [start_pos; end_pos];
site.cost = calc_path_cost(site.path, map);
site.unimproved = 0;
site.bees = init_bees(site, map, start_pos, end_pos);
sites(end+1) = site;
end
end
function bees = init_bees(site, map, start_pos, end_pos)
% 初始化工蜂
bees = struct('path', {}, 'cost', {});
for i = 1:length(site.path)-1
pos1 = site.path(i,:);
pos2 = site.path(i+1,:);
path = find_path(map, pos1, pos2);
cost = calc_path_cost(path, map);
bee = struct('path', path, 'cost', cost);
bees(end+1) = bee;
end
end
function site = update_site(site, new_path)
% 更新蜜蜂巢
site.path = new_path;
site.cost = calc_path_cost(new_path, map);
site.unimproved = site.unimproved + 1;
end
function new_path = search_new_path(path, map, start_pos, end_pos)
% 搜寻新的解
new_path = path;
while true
% 随机选取一个节点
idx = randi(length(path)-2) + 1;
pos1 = path(idx,:);
pos2 = path(idx+1,:);
% 随机生成一个新节点
new_pos = rand_pos(map);
% 判断是否可以连通
if is_connect(map, pos1, new_pos) && is_connect(map, new_pos, pos2)
% 更新路径
new_path = [new_path(1:idx,:); new_pos; new_path(idx+1:end,:)];
break;
end
end
end
function sites = refine_sites(sites, map, start_pos, end_pos)
% 纤细化阶段
for i = 1:length(sites)
for j = 1:length(sites(i).path)-2
pos1 = sites(i).path(j,:);
pos2 = sites(i).path(j+2,:);
% 随机生成一个新节点
new_pos = rand_pos(map);
% 判断是否可以连通
if is_connect(map, pos1, new_pos) && is_connect(map, new_pos, pos2)
% 更新路径
new_path = [sites(i).path(1:j,:); new_pos; sites(i).path(j+1:end,:)];
new_cost = calc_path_cost(new_path, map);
% 判断是否改善
if new_cost < sites(i).cost
sites(i).path = new_path;
sites(i).cost = new_cost;
sites(i).unimproved = 0;
% 记录最优解
if new_cost < best_cost
best_path = new_path;
best_cost = new_cost;
end
else
sites(i).unimproved = sites(i).unimproved + 1;
end
% 判断是否连续不改善过多
if sites(i).unimproved > max_unimproved
% 重新初始化蜜蜂巢
sites(i) = init_site(map, start_pos, end_pos);
end
end
end
end
end
function cost = calc_path_cost(path, map)
% 计算路径代价
cost = sum(arrayfun(@(pos) map(pos(1),pos(2)), path));
end
function pos = rand_pos(map)
% 随机生成一个节点
pos = randi(size(map));
end
function is_connect = is_connect(map, pos1, pos2)
% 判断两个节点是否连通
[~, path] = find_path(map, pos1, pos2);
is_connect = ~isempty(path);
end
function [cost, path] = find_path(map, start_pos, end_pos)
% A*算法寻找路径
% 略
end
这段代码实现了一个简单的蜂群算法路径规划。其中,init_sites
函数初始化蜜蜂巢,init_bees
函数初始化工蜂,search_new_path
函数搜寻新的解,update_site
函数更新蜜蜂巢,refine_sites
函数进行纤细化,calc_path_cost
函数计算路径代价,rand_pos
函数随机生成一个节点,is_connect
函数判断两个节点是否连通,find_path
函数使用A*算法寻找路径。
需要注意的是,这段代码仅供参考,具体实现可能需要根据实际情况进行修改。
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SNR=10log10∥s(n)∥2∥s(n)−s^(n)∥2\text{SNR=10lo}{{\text{g}}_{10}}\frac{{{\left\| \mathbf{s}\left( n \right) \right\|}^{2}}}{{{\left\| \mathbf{s}\left( n \right)-\mathbf{\hat{s}}\left( n \right) \right\|}^{2}}}SNR=10log10∥s(n)−s^(n)∥2∥s(n)∥2
其中,s(n)\mathbf{s}\left( n \right)s(n)和s^(n)\mathbf{\hat{s}}\left( n \right)s^(n)分别代表纯净语音和增强后的语音。
function [best_path, best_cost] = swarm_path(grid, start, goal, num_bees, num_iterations)
% grid: 栅格地图,每个格子表示一个节点
% start: 起点,从这个节点开始搜索
% goal: 目标节点,从这个节点开始搜索
% num_bees: 蜂群中的蜜蜂数量
% num_iterations: 搜索的迭代次数
% 初始化蜂群
swarm = [];
for i = 1:num_bees
swarm = swarm + grid(start(i), :);
end
% 初始化路径
path = [];
for i = 1:num_iterations
% 计算路径长度
path_length = 0;
for j = 1:num_bees
path_length = path_length + grid(start(j), :).^2;
end
% 计算路径权重
path_weight = 1;
for j = 1:num_bees
path_weight = path_weight + grid(start(j), :).^2;
end
% 选择最优路径
best_path = path;
best_cost = path_length;
for j = 1:num_bees
if path_weight(j) < path_weight(swarm(j))
best_path = path(j);
best_cost = path_length(j);
end
end
end
end
可以参考一下是否有用
以下是一个基于蜂群算法的路径规划MATLAB代码示例,适用于栅格地图。