no code implementations • 12 Apr 2024 • Rongguang Ye, Lei Chen, Weiduo Liao, Jinyuan Zhang, Hisao Ishibuchi
In this manner, the proposed method can sample preference vectors from the location of the Pareto front with a high probability.
2 code implementations • 12 Apr 2024 • Rongguang Ye, Longcan Chen, Jinyuan Zhang, Hisao Ishibuchi
Recently, Pareto Set Learning (PSL) has been proposed for learning the entire Pareto set using a neural network.
no code implementations • 1 Feb 2024 • Chanjuan Liu, Shike Ge, Zhihan Chen, Wenbin Pei, Enqiang Zhu, Yi Mei, Hisao Ishibuchi
The Critical Node Problem (CNP) is concerned with identifying the critical nodes in a complex network.
1 code implementation • 7 Sep 2023 • Naoki Masuyama, Yusuke Nojima, Yuichiro Toda, Chu Kiong Loo, Hisao Ishibuchi, Naoyuki Kubota
In the clustering domain, various algorithms with a federated learning framework (i. e., federated clustering) have been actively studied and showed high clustering performance while preserving data privacy.
1 code implementation • 1 May 2023 • Naoki Masuyama, Takanori Takebayashi, Yusuke Nojima, Chu Kiong Loo, Hisao Ishibuchi, Stefan Wermter
In general, a similarity threshold (i. e., a vigilance parameter) for a node learning process in Adaptive Resonance Theory (ART)-based algorithms has a significant impact on clustering performance.
1 code implementation • 7 Sep 2022 • Tianye Shu, Ke Shang, Hisao Ishibuchi, Yang Nan
In this study, we examine the effects of the archive size on three aspects: (i) the quality of the selected final solution set, (ii) the total computation time for the archive maintenance and the final solution set selection, and (iii) the required memory size.
no code implementations • 21 Jun 2022 • Wei Liu, Rui Wang, Tao Zhang, Kaiwen Li, Wenhua Li, Hisao Ishibuchi
Multi-objective orienteering problems (MO-OPs) are classical multi-objective routing problems and have received a lot of attention in the past decades.
no code implementations • 22 Apr 2022 • Takato Kinoshita, Naoki Masuyama, Yiping Liu, Yusuke Nojima, Hisao Ishibuchi
Decomposition-based multiobjective evolutionary algorithms (MOEAs) with clustering-based reference vector adaptation show good optimization performance for many-objective optimization problems (MaOPs).
no code implementations • 4 Mar 2022 • Ke Shang, WeiYu Chen, Weiduo Liao, Hisao Ishibuchi
In this letter, we propose HV-Net, a new method for hypervolume approximation in evolutionary multi-objective optimization.
no code implementations • 26 Jan 2022 • Naoki Masuyama, Narito Amako, Yuna Yamada, Yusuke Nojima, Hisao Ishibuchi
In addition, for improving information extraction performance, a divisive hierarchical clustering algorithm capable of continual learning is proposed by introducing a hierarchical structure to the proposed algorithm.
1 code implementation • 18 Jan 2022 • Ke Shang, Tianye Shu, Hisao Ishibuchi
The learned direction vector set can then be used in the $R_2^{\text{HVC}}$ indicator to improve its approximation quality.
1 code implementation • 18 Jan 2022 • Ke Shang, Tianye Shu, Hisao Ishibuchi, Yang Nan, Lie Meng Pang
This paper aims to fill this research gap by proposing a benchmark test suite for subset selection from large candidate solution sets, and comparing some representative methods using the proposed test suite.
no code implementations • 19 Aug 2021 • WeiYu Chen, Hisao Ishibuchi, Ke Shang
Subset selection is an important component in evolutionary multiobjective optimization (EMO) algorithms.
no code implementations • 21 Jun 2021 • Rahul Kumar Sevakula, Nishchal Kumar Verma, Hisao Ishibuchi
Recent discoveries in Deep Neural Networks are allowing researchers to tackle some very complex problems such as image classification and audio classification, with improved theoretical and empirical justifications.
no code implementations • 20 Apr 2021 • Ke Shang, Hisao Ishibuchi, WeiYu Chen, Yang Nan, Weiduo Liao
Then, we show that a uniform solution set on the plane-based Pareto front is not always optimal for hypervolume maximization.
1 code implementation • 2 Mar 2021 • Naoki Masuyama, Yusuke Nojima, Chu Kiong Loo, Hisao Ishibuchi
This paper proposes a multi-label classification algorithm capable of continual learning by applying an Adaptive Resonance Theory (ART)-based clustering algorithm and the Bayesian approach for label probability computation.
1 code implementation • 1 Feb 2021 • WeiYu Chen, Hisao Ishibuchi, Ke Shang
Especially, in an EMO algorithm with an unbounded external archive, subset selection is an essential post-processing procedure to select a pre-specified number of solutions as the final result.
no code implementations • 31 Jan 2021 • Yiming Peng, Hisao Ishibuchi
Since equivalent solutions are overlapping (i. e., occupying the same position) in the objective space, standard diversity estimators such as crowding distance are likely to select one of them and discard the others, which may cause diversity loss in the decision space.
no code implementations • 14 Dec 2020 • Hisao Ishibuchi, Lie Meng Pang, Ke Shang
The three solution sets are the main population of an EMO algorithm, an external archive to store promising solutions, and a final solution set which is presented to the decision maker.
no code implementations • 2 Oct 2020 • Ryoji Tanabe, Hisao Ishibuchi
An unbounded external archive (UEA), which stores all nondominated solutions found during the search process, is frequently used to evaluate the performance of multi-objective evolutionary algorithms (MOEAs) in recent studies.
no code implementations • 1 Oct 2020 • Ryoji Tanabe, Hisao Ishibuchi
To address this issue, we present a review of the existing configurations of the DE mutation operator in MOEA/D-DE and systematically examine the influence of each component on the performance of MOEA/D-DE.
no code implementations • 1 Oct 2020 • Ryoji Tanabe, Hisao Ishibuchi
Results show that the proposed method can handle a large number of objectives and find a good approximation of multiple equivalent Pareto optimal solutions.
no code implementations • 30 Sep 2020 • Ryoji Tanabe, Hisao Ishibuchi
The performance of improved versions of six decomposition-based evolutionary algorithms by our framework is evaluated on various test problems regarding the number of objectives, decision variables, and equivalent Pareto optimal solution sets.
no code implementations • 30 Sep 2020 • Ryoji Tanabe, Hisao Ishibuchi
Since around 2000, it has been considered that elitist evolutionary multi-objective optimization algorithms (EMOAs) always outperform non-elitist EMOAs.
no code implementations • 28 Sep 2020 • Ryoji Tanabe, Hisao Ishibuchi
Multi-modal multi-objective optimization aims to find all Pareto optimal solutions including overlapping solutions in the objective space.
no code implementations • 27 Sep 2020 • Ryoji Tanabe, Hisao Ishibuchi
One promising approach for understanding quality indicators is the use of the optimal distribution of objective vectors that optimizes each quality indicator.
1 code implementation • 27 Sep 2020 • Ryoji Tanabe, Hisao Ishibuchi
Although synthetic test problems are widely used for the performance assessment of evolutionary multi-objective optimization algorithms, they are likely to include unrealistic properties which may lead to overestimation/underestimation.
no code implementations • 17 Aug 2020 • Lie Meng Pang, Hisao Ishibuchi, Ke Shang
In the final population framework, the final population of an EMO algorithm is presented to the decision maker.
no code implementations • 27 Jul 2020 • Lie Meng Pang, Hisao Ishibuchi, Ke Shang
In this framework, which is referred to as the solution selection framework, the final population does not have to be a good solution set.
no code implementations • 15 Jun 2020 • Hisao Ishibuchi, Lie Meng Pang, Ke Shang
The selection of a single final solution from the obtained solutions is assumed to be done by a human decision maker.
no code implementations • 21 Apr 2020 • Yiming Peng, Hisao Ishibuchi
With a clearing mechanism and a greedy removal strategy, our proposed algorithm can effectively preserve equivalent Pareto optimal solutions (i. e., different Pareto optimal solutions with same objective values).
no code implementations • 22 Mar 2020 • Wei-Yu Chen, Hisao Ishibuchi, Ke Shang
In other studies, it is shown that the objective space discretization improves the performance on combinatorial multi-objective problems.
1 code implementation • 15 May 2018 • Ke Shang, Hisao Ishibuchi, Xizi Ni
The basic idea of the proposed method is to use different line segments only in the hypervolume contribution region for the hypervolume contribution approximation.
Optimization and Control
no code implementations • 25 Jan 2018 • Muhammad Atif, Siddique Latif, Rizwan Ahmad, Adnan Khalid Kiani, Junaid Qadir, Adeel Baig, Hisao Ishibuchi, Waseem Abbas
Cyber-Physical Systems (CPS) allow us to manipulate objects in the physical world by providing a communication bridge between computation and actuation elements.
no code implementations • 8 Jun 2017 • Yuan Yuan, Yew-Soon Ong, Liang Feng, A. K. Qin, Abhishek Gupta, Bingshui Da, Qingfu Zhang, Kay Chen Tan, Yaochu Jin, Hisao Ishibuchi
In this report, we suggest nine test problems for multi-task multi-objective optimization (MTMOO), each of which consists of two multiobjective optimization tasks that need to be solved simultaneously.
no code implementations • 19 Sep 2014 • Zhaohong Deng, Yizhang Jiang, Fu-Lai Chung, Hisao Ishibuchi, Kup-Sze Choi, Shitong Wang
Specifically, the idea of leveraging knowledge from the source domain is exploited to develop a set of transfer prototype based fuzzy clustering (TPFC) algorithms.