Search Results for author: Zhang-Hua Fu

Found 7 papers, 3 papers with code

A Hierarchical Destroy and Repair Approach for Solving Very Large-Scale Travelling Salesman Problem

no code implementations9 Aug 2023 Zhang-Hua Fu, Sipeng Sun, Jintong Ren, Tianshu Yu, Haoyu Zhang, Yuanyuan Liu, Lingxiao Huang, Xiang Yan, Pinyan Lu

Fair comparisons based on nineteen famous large-scale instances (with 10, 000 to 10, 000, 000 cities) show that HDR is highly competitive against existing state-of-the-art TSP algorithms, in terms of both efficiency and solution quality.

Computational Efficiency

An effective hybrid search algorithm for the multiple traveling repairman problem with profits

1 code implementation9 Nov 2021 Jintong Ren, Jin-Kao Hao, Feng Wu, Zhang-Hua Fu

As an extension of the traveling repairman problem with profits, the multiple traveling repairman problem with profits consists of multiple repairmen who visit a subset of all customers to maximize the revenues collected through the visited customers.

Generalize a Small Pre-trained Model to Arbitrarily Large TSP Instances

1 code implementation19 Dec 2020 Zhang-Hua Fu, Kai-Bin Qiu, Hongyuan Zha

For the traveling salesman problem (TSP), the existing supervised learning based algorithms suffer seriously from the lack of generalization ability.

Graph Sampling Reinforcement Learning (RL) +1

Targeted sampling of enlarged neighborhood via Monte Carlo tree search for TSP

1 code implementation ICLR 2020 Zhang-Hua Fu, Kai-Bin Qiu, Meng Qiu, Hongyuan Zha

More precisely, the search process is considered as a Markov decision process (MDP), where a 2-opt local search is used to search within a small neighborhood, while a Monte Carlo tree search (MCTS) method (which iterates through simulation, selection and back-propagation steps), is used to sample a number of targeted actions within an enlarged neighborhood.

BIG-bench Machine Learning Combinatorial Optimization

Variable Population Memetic Search: A Case Study on the Critical Node Problem

no code implementations12 Sep 2019 Yangming Zhou, Jin-Kao Hao, Zhang-Hua Fu, Zhe Wang, Xiangjing Lai

Population-based memetic algorithms have been successfully applied to solve many difficult combinatorial problems.

A Three-Phase Search Approach for the Quadratic Minimum Spanning Tree Problem

no code implementations6 Feb 2014 Zhang-Hua Fu, Jin-Kao Hao

Given an undirected graph with costs associated with each edge as well as each pair of edges, the quadratic minimum spanning tree problem (QMSTP) consists of determining a spanning tree of minimum total cost.

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