no code implementations • 20 Nov 2024 • Yong Xie, Weijie Zheng, Hanxun Huang, Guangnan Ye, Xingjun Ma
Over the past decade, a large number of white-box adversarial robustness evaluation methods (i. e., attacks) have been proposed, ranging from single-step to multi-step methods and from individual to ensemble methods.
no code implementations • 8 Aug 2024 • Weijie Zheng
We prove that for any set of weights, the set of optima found by scalarization approach cannot cover the full Pareto front.
no code implementations • 3 Aug 2024 • Weijie Zheng, Xingjun Ma, Hanxun Huang, Zuxuan Wu, Yu-Gang Jiang
With the advancement of vision transformers (ViTs) and self-supervised learning (SSL) techniques, pre-trained large ViTs have become the new foundation models for computer vision applications.
no code implementations • 25 Jul 2024 • Weijie Zheng, Yao Gao, Benjamin Doerr
These results suggest that our truthful version of the NSGA-II has the same good performance as the classic NSGA-II in two objectives, but can resolve the drastic problems in more than two objectives.
no code implementations • 16 Dec 2023 • Weijie Zheng, Benjamin Doerr
To this aim, we first propose a many-objective counterpart, the m-objective mOJZJ, of the bi-objective OJZJ, which is the first many-objective multimodal benchmark for runtime analysis.
no code implementations • 11 May 2023 • Weijie Zheng, Xin Yao
We prove that except for some small and positive time-linkage effects (that is, for weights $0$ and $1$), randomized local search (RLS) and (1+1)EA cannot converge to the global optimum with a positive probability.
no code implementations • 23 Nov 2022 • Weijie Zheng, Benjamin Doerr
The NSGA-II is one of the most prominent algorithms to solve multi-objective optimization problems.
no code implementations • 18 Jun 2022 • Weijie Zheng, Benjamin Doerr
Building on a recent quantitative analysis of how the population size leads to genetic drift, we design a smart-restart mechanism for EDAs.
no code implementations • 5 Mar 2022 • Weijie Zheng, Benjamin Doerr
In this work, we study how well it approximates the Pareto front when the population size is smaller.
1 code implementation • 16 Dec 2021 • Weijie Zheng, Benjamin Doerr
The non-dominated sorting genetic algorithm II (NSGA-II) is the most intensively used multi-objective evolutionary algorithm (MOEA) in real-world applications.
no code implementations • 14 Sep 2021 • Shouda Wang, Weijie Zheng, Benjamin Doerr
Our finding that the unary unbiased black-box complexity is only $O(n^2)$ suggests the Metropolis algorithm as an interesting candidate and we prove that it solves the DLB problem in quadratic time.
no code implementations • 14 Apr 2021 • Weijie Zheng, Qiaozhi Zhang, Huanhuan Chen, Xin Yao
However, only two elitist algorithms (1+1)EA and ($\mu$+1)EA are analyzed, and it is unknown whether the non-elitism mechanism could help to escape the local optima existed in OneMax$_{(0, 1^n)}$.
no code implementations • 14 Dec 2020 • Weijie Zheng, Benjamin Doerr
As a first step towards a deeper understanding of how evolutionary algorithms solve multimodal multiobjective problems, we propose the OJZJ problem, a bi-objective problem composed of two objectives isomorphic to the classic jump function benchmark.
no code implementations • 26 Apr 2020 • Weijie Zheng, Huanhuan Chen, Xin Yao
In real-world applications, many optimization problems have the time-linkage property, that is, the objective function value relies on the current solution as well as the historical solutions.
no code implementations • 15 Apr 2020 • Benjamin Doerr, Weijie Zheng
One of the key difficulties in using estimation-of-distribution algorithms is choosing the population size(s) appropriately: Too small values lead to genetic drift, which can cause enormous difficulties.
no code implementations • 31 Oct 2019 • Benjamin Doerr, Weijie Zheng
This paper further proves that for PBIL with parameters $\mu$, $\lambda$, and $\rho$, in an expected number of $\Theta(\mu/\rho^2)$ iterations the sampling frequency of a neutral bit leaves the interval $[\Theta(\rho/\mu), 1-\Theta(\rho/\mu)]$ and then always the same value is sampled for this bit, that is, the frequency approaches the corresponding boundary value with maximum speed.
no code implementations • 9 Dec 2018 • Benjamin Doerr, Weijie Zheng
On the technical side, we observe that the strong stochastic dependencies in the random experiment describing a run of BDE prevent us from proving all desired results with the mathematical rigor that was successfully used in the analysis of other evolutionary algorithms.