Implementation and Results of a "Randomized Local Search for Two-Dimensional Bin Packing and a Negative Result for Frequency Fitness Assignment"

1. Introduction

In this archive, we provide the implementation and experimental results of a Randomized Local Search (RLS) applied to the two-dimensional bin packing problem with and without orientation. As benchmark dataset, we use the beng, A, and class instances from 2DPackLib as well as the four non-trivial Almost Squares in Almost Squares (Asqas) instances

These are the data used in the paper below, which contains the exact specification of all algorithms, objective functions, and the encoding we applied.

Rui Zhao, Zhize Wu, Daan van den Berg, Matthias Thürer, Tianyu Liang, Ming Tan, and Thomas Weise. Randomized Local Search for Two-Dimensional Bin Packing and a Negative Result for Frequency Fitness Assignment. In 16th International Conference on Evolutionary Computation Theory and Applications (ECTA'24), part of the 16th International Joint Conference on Computational Intelligence (IJCCI'24). November 20-24, 2024. Porto, Portugal. Setúbal, Portugal: SciTePress.

To run the experiments, you need moptipyapps and moptipy, which contain the actual algorithm implementations. Both packages are available on GitHub and on PyPI. However, we include several versions of them in the folder source/packages, just in case.

2. Directory Structure

This archive contains the following directories:

source contains the Python source codes needed to run the experiment.

source/packages contains the source codes of the Python packages with the actual algorithm implementations.

source/experiment_execution_scripts contains the scripts to run the experiments.

results is the directory with the results, i.e., with the log files generated by the experiment.

evaluator is the folder containing Python scripts that were used to evaluate these results.

evaluation was generated using the evaluation scripts and contains tables and figures and a result summary in CSV format.

3. License

The files in this repository are under the Creative Commons Attribution 4.0 International, with the exception of the files of 2DPackLib and other benchmark datasets included, which are under copyright of their respective owner (we believe that they are in the public domain, as they are provided by many sources, included in many software packages under various open source licenses, and on many websites). The license is contained as file LICENSE.txt in this archive.

4. Contact

If you have any questions or suggestions, please contact

Mr. Rui ZHAO (赵睿) of the Institute of Applied Optimization (应用优化研究所, IAO) of the School of Artificial Intelligence and Big Data (人工智能与大数据学院) at Hefei University (合肥大学) in Hefei, Anhui, China (中国安徽省合肥市) via email to [e-mail].