no code implementations • 25 Feb 2023 • An Chen, Zhigang Ren, Muyi Wang, Hui Chen, Haoxi Leng, Shuai Liu
Convolutional neural networks (CNNs) have gained remarkable success in recent years.
no code implementations • 3 Mar 2021 • Yongsheng Liang, Zhigang Ren, Lin Wang, Hanqing Liu, Wenhao Du
The decomposition operation significantly narrows the search space of the whole traffic network, and the surrogate-assisted optimizer greatly lowers the computational burden by reducing the number of expensive traffic simulations.
no code implementations • 1 Mar 2021 • Xiaodong Ren, Daofu Guo, Zhigang Ren, Yongsheng Liang, An Chen
By remarkably reducing real fitness evaluations, surrogate-assisted evolutionary algorithms (SAEAs), especially hierarchical SAEAs, have been shown to be effective in solving computationally expensive optimization problems.
no code implementations • 19 Jan 2021 • An Chen, Zhigang Ren, Muyi Wang, Yongsheng Liang, Hanqing Liu, Wenhao Du
SVG first designs a general-separability-oriented detection criterion according to whether the optimum of a variable changes with other variables.
no code implementations • 5 Apr 2020 • Zhigang Ren, Yongsheng Liang, Muyi Wang, Yang Yang, An Chen
Different from existing DC-based algorithms that perform decomposition and optimization in the original decision space, EDC first establishes an eigenspace by conducting singular value decomposition on a set of high-quality solutions selected from recent generations.
no code implementations • 1 Mar 2018 • Bei Pang, Zhigang Ren, Yongsheng Liang, An Chen
As for the nonseparable sub-problems, the surrogate models are employed to evaluate the corresponding sub-solutions, and the original simulation model is only adopted to reevaluate some good sub-solutions selected by surrogate models.
no code implementations • 1 Mar 2018 • Yongsheng Liang, Zhigang Ren, Bei Pang, An Chen
As a model-based evolutionary algorithm, estimation of distribution algorithm (EDA) possesses unique characteristics and has been widely applied to global optimization.
no code implementations • 1 Mar 2018 • An Chen, Yi-Peng Zhang, Zhigang Ren, Yongsheng Liang, Bei Pang
On the one hand, by reducing the sensitivity of the indicator in DG to the roundoff error and the magnitude of contribution weight of subcomponent, we proposed a new indicator for two variables which is much more sensitive to their interaction.
no code implementations • 27 Feb 2018 • Zhigang Ren, Bei Pang, Yongsheng Liang, An Chen, Yi-Peng Zhang
It has been shown that cooperative coevolution (CC) can effectively deal with large scale optimization problems (LSOPs) through a divide-and-conquer strategy.
no code implementations • 27 Feb 2018 • Zhigang Ren, Yongsheng Liang, Aimin Zhang, Yang Yang, Zuren Feng, Lin Wang
Cooperative coevolution (CC) has shown great potential in solving large scale optimization problems (LSOPs).
no code implementations • 25 Feb 2018 • Yongsheng Liang, Zhigang Ren, Xianghua Yao, Zuren Feng, An Chen
This study first systematically analyses the reasons for the deficiency of the traditional GEDA, then tries to enhance its performance by exploiting its evolution direction, and finally develops a new GEDA variant named EDA2.