nowcost += graph[x[s - 1]][x[s]] # 将花费加入 TSP(graph, n, s+1) nowcost -= graph[x[s - 1]][x[s]] # 回溯上去还需要减去 x[i], x[s] = x[s], x[i] # 别忘记交换回来 TSP(graph, n, 1) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
随着 n 的增大,解空间会迅速膨胀。 4、旅行商问题(TSP)的简化示例(3 个城市) 假设有 3 个城市 A、B、C,城市之间的距离矩阵如下(这里距离是随意设定的): | 城市 | A|B|C| |:--:|:--:|:--:|:--:| |A|0|10|15| |B|10|0|20| |C|15|20|0| 要找到最短的旅行路线(每个城市只访问一次...
ACO算法求解TSP问题Python代码如下: import time from itertools import chain from typing import Any, Callable, List, Tuple, Union import matplotlib.pyplot as plt from Data import * import numpy as np import random class AntColonySolver: def __init__(self, cost_fn: Callable[[Any, Any], Union...
My code:draw-tsp-path.py,draw-tsp-path-concorde.pyandstippling.pyis licensed underCC-BY 4.0- basically if you use/remix my code, just make sure my name is in there somewhere for credit! Images: The images inimagesandexample-outputare underMIT- feel free to use/remix/modify them without...
TSP模拟退火代码 python 模拟退火优化bp %% 基于模拟退火遗传算法优化BP神经网络的钢带厚度预测 clear clc close all format short %% 加载训练数据 Xtr=xlsread('train_data.xlsx'); DD=size(Xtr,2); input_train=Xtr(:,1:DD-1)';% output_train=Xtr(:,DD)';%...
For instance, to use a local search method:from python_tsp.heuristics import solve_tsp_local_search permutation, distance = solve_tsp_local_search(distance_matrix)In this case there is generally no guarantee of optimality, but in this small instance the answer is normally a permutation with ...
self.Chrom^=maskreturnself.Chromdefmutation_TSP_1(self):'''every gene in every chromosome mutate :param self: :return:'''foriinrange(self.size_pop):forjinrange(self.n_dim):ifnp.random.rand() <self.prob_mut: n= np.random.randint(0, self.len_chrom, 1) ...
这一问题在计算机科学以及相关领域中被称为旅行者商人问题[1](Traveling Salesman Problem,TSP)。说这个问题是复杂类【NP完全】中最著名的一个问题也不为过。由于目前主流的观点认为P≠NP[2],所以现在普遍认为没有多项式时间的算法可以解决这个问题。确实,现在针对这个问题的精确算法[3](exact algorithm)无一例外的...
gethtsp(query)：用于获取信息，通过get方法向后端发送查询参数。updatehtsp(data)：修改信息，通过put方法向指定id的后端发送数据。deletehtsp(data)：删除信息，通过delete方法向指定id的后端发送请求。createhtsp(data)：创建新信息，通过post方法向后端发送数据。这些方法中，我们都需要指定url（即后端的接口地址）、...
py install for pesq did not run successfully. │ exit code: 1 ╰─> [28 lines of output] /home/fanyi/anaconda3/envs/nemo/lib/python3.8/site-packages/setuptools/installer.py:27: SetuptoolsDeprecationWarning: setuptools.installer is deprecated. Requirements should be satisfied by a PEP 517 ...