Search Results for author: Wei Du

Found 32 papers, 2 papers with code

An Enhanced Differential Grouping Method for Large-Scale Overlapping Problems

no code implementations16 Apr 2024 Maojiang Tian, Mingke Chen, Wei Du, Yang Tang, Yaochu Jin

In this article, we propose a two-stage enhanced grouping method for large-scale overlapping problems, called OEDG, which achieves accurate grouping while significantly reducing computational resource consumption.

A Composite Decomposition Method for Large-Scale Global Optimization

no code implementations2 Mar 2024 Maojiang Tian, Minyang Chen, Wei Du, Yang Tang, Yaochu Jin, Gary G. Yen

Furthermore, to enhance the efficiency and accuracy of CSG, we introduce two innovative methods: a multiplicatively separable variable detection method and a non-separable variable grouping method.

Problem Decomposition Variable Detection

Syntactic Ghost: An Imperceptible General-purpose Backdoor Attacks on Pre-trained Language Models

no code implementations29 Feb 2024 Pengzhou Cheng, Wei Du, Zongru Wu, Fengwei Zhang, Libo Chen, Gongshen Liu

Specifically, the method hostilely manipulates poisoned samples with different predefined syntactic structures as stealth triggers and then implants the backdoor to pre-trained representation space without disturbing the primitive knowledge.

Contrastive Learning Natural Language Understanding

How Large Language Models Encode Context Knowledge? A Layer-Wise Probing Study

1 code implementation25 Feb 2024 Tianjie Ju, Weiwei Sun, Wei Du, Xinwei Yuan, Zhaochun Ren, Gongshen Liu

Previous work has showcased the intriguing capability of large language models (LLMs) in retrieving facts and processing context knowledge.

Revisiting the Information Capacity of Neural Network Watermarks: Upper Bound Estimation and Beyond

no code implementations20 Feb 2024 Fangqi Li, Haodong Zhao, Wei Du, Shilin Wang

To trace the copyright of deep neural networks, an owner can embed its identity information into its model as a watermark.

Investigating Multi-Hop Factual Shortcuts in Knowledge Editing of Large Language Models

no code implementations19 Feb 2024 Tianjie Ju, Yijin Chen, Xinwei Yuan, Zhuosheng Zhang, Wei Du, Yubin Zheng, Gongshen Liu

Recent work has showcased the powerful capability of large language models (LLMs) in recalling knowledge and reasoning.

knowledge editing

Detection of Opioid Users from Reddit Posts via an Attention-based Bidirectional Recurrent Neural Network

1 code implementation9 Feb 2024 Yuchen Wang, Zhengyu Fang, Wei Du, Shuai Xu, Rong Xu, Jing Li

The opioid epidemic, referring to the growing hospitalizations and deaths because of overdose of opioid usage and addiction, has become a severe health problem in the United States.

Diffusion Model-Based Multiobjective Optimization for Gasoline Blending Scheduling

no code implementations4 Feb 2024 Wenxuan Fang, Wei Du, Renchu He, Yang Tang, Yaochu Jin, Gary G. Yen

The presence of nonlinearity, integer constraints, and a large number of decision variables adds complexity to this problem, posing challenges for traditional and evolutionary algorithms.

Evolutionary Algorithms Multiobjective Optimization +1

Knowledge-Assisted Dual-Stage Evolutionary Optimization of Large-Scale Crude Oil Scheduling

no code implementations9 Jan 2024 Wanting Zhang, Wei Du, Guo Yu, Renchu He, Wenli Du, Yaochu Jin

On the basis of the proposed model, a dual-stage evolutionary algorithm driven by heuristic rules (denoted by DSEA/HR) is developed, where the dual-stage search mechanism consists of global search and local refinement.

Scheduling

A Novel Dual-Stage Evolutionary Algorithm for Finding Robust Solutions

no code implementations2 Jan 2024 Wei Du, Wenxuan Fang, Chen Liang, Yang Tang, Yaochu Jin

The primary objective of the peak-detection stage is to identify peaks in the fitness landscape of the original optimization problem.

Effective Proxy for Human Labeling: Ensemble Disagreement Scores in Large Language Models for Industrial NLP

no code implementations11 Sep 2023 Wei Du, Laksh Advani, Yashmeet Gambhir, Daniel J Perry, Prashant Shiralkar, Zhengzheng Xing, Aaron Colak

For industry applications, it is imperative to assess the performance of the LLM on unlabeled production data from time to time to validate for a real-world setting.

Keyphrase Extraction

3DHacker: Spectrum-based Decision Boundary Generation for Hard-label 3D Point Cloud Attack

no code implementations ICCV 2023 Yunbo Tao, Daizong Liu, Pan Zhou, Yulai Xie, Wei Du, Wei Hu

With the maturity of depth sensors, the vulnerability of 3D point cloud models has received increasing attention in various applications such as autonomous driving and robot navigation.

Autonomous Driving Robot Navigation

A Robust Classifier Under Missing-Not-At-Random Sample Selection Bias

no code implementations25 May 2023 Huy Mai, Wen Huang, Wei Du, Xintao Wu

In this paper, we propose BiasCorr, an algorithm that improves on Greene's method by modifying the original training set in order for a classifier to learn under MNAR sample selection bias.

Robust classification Selection bias

UOR: Universal Backdoor Attacks on Pre-trained Language Models

no code implementations16 May 2023 Wei Du, Peixuan Li, Boqun Li, Haodong Zhao, Gongshen Liu

In this paper, we first summarize the requirements that a more threatening backdoor attack against PLMs should satisfy, and then propose a new backdoor attack method called UOR, which breaks the bottleneck of the previous approach by turning manual selection into automatic optimization.

Backdoor Attack Contrastive Learning +2

Compressing Cross-Lingual Multi-Task Models at Qualtrics

no code implementations29 Nov 2022 Daniel Campos, Daniel Perry, Samir Joshi, Yashmeet Gambhir, Wei Du, Zhengzheng Xing, Aaron Colak

Experience management is an emerging business area where organizations focus on understanding the feedback of customers and employees in order to improve their end-to-end experiences.

Management Model Compression +3

FedPrompt: Communication-Efficient and Privacy Preserving Prompt Tuning in Federated Learning

no code implementations25 Aug 2022 Haodong Zhao, Wei Du, Fangqi Li, Peixuan Li, Gongshen Liu

In this paper, we propose "FedPrompt" to study prompt tuning in a model split aggregation way using FL, and prove that split aggregation greatly reduces the communication cost, only 0. 01% of the PLMs' parameters, with little decrease on accuracy both on IID and Non-IID data distribution.

Backdoor Attack Data Poisoning +2

Towards Fairness-Aware Multi-Objective Optimization

no code implementations22 Jul 2022 Guo Yu, Lianbo Ma, Wei Du, Wenli Du, Yaochu Jin

Recent years have seen the rapid development of fairness-aware machine learning in mitigating unfairness or discrimination in decision-making in a wide range of applications.

BIG-bench Machine Learning Decision Making +2

Poisoning Attacks on Fair Machine Learning

no code implementations17 Oct 2021 Minh-Hao Van, Wei Du, Xintao Wu, Aidong Lu

Our framework enables attackers to flexibly adjust the attack's focus on prediction accuracy or fairness and accurately quantify the impact of each candidate point to both accuracy loss and fairness violation, thus producing effective poisoning samples.

BIG-bench Machine Learning Fairness

Fair Regression under Sample Selection Bias

no code implementations8 Oct 2021 Wei Du, Xintao Wu, Hanghang Tong

However, all previous fair regression research assumed the training data and testing data are drawn from the same distributions.

Attribute Fairness +2

Robust Fairness-aware Learning Under Sample Selection Bias

no code implementations24 May 2021 Wei Du, Xintao Wu

However, the assumption is often violated in real world due to the sample selection bias between the training and test data.

Fairness Selection bias

Coordinated Frequency and Voltage Regulation of Grid-Following and Grid-Forming Inverters

no code implementations12 Dec 2020 Ankit Singhal, Thanh Long Vu, Wei Du

In a purely inverter-based microgrid, both grid-forming (GFM) and grid-following (GFL) inverters will have a crucial role to play in frequency/voltage regulation and maintaining power sharing through their grid support capabilities.

Fairness-aware Agnostic Federated Learning

no code implementations10 Oct 2020 Wei Du, Depeng Xu, Xintao Wu, Hanghang Tong

In this paper, we develop a fairness-aware agnostic federated learning framework (AgnosticFair) to deal with the challenge of unknown testing distribution.

Fairness Federated Learning

PoliteCamera: Respecting Strangers' Privacy in Mobile Photographing

no code implementations24 May 2020 Ang Li, Wei Du, Qinghua Li

Through the cooperation between a photographer and a stranger, the stranger's face in a photo can be automatically blurred upon his request when the photo is taken.

Multi-Resolution A*

no code implementations14 Apr 2020 Wei Du, Fahad Islam, Maxim Likhachev

We show that MRA* is bounded suboptimal with respect to the anchor resolution search space and resolution complete.

Motion Planning

Removing Disparate Impact of Differentially Private Stochastic Gradient Descent on Model Accuracy

no code implementations8 Mar 2020 Depeng Xu, Wei Du, Xintao Wu

In this work, we analyze the inequality in utility loss by differential privacy and propose a modified differentially private stochastic gradient descent (DPSGD), called DPSGD-F, to remove the potential disparate impact of differential privacy on the protected group.

Transfer Heterogeneous Knowledge Among Peer-to-Peer Teammates: A Model Distillation Approach

no code implementations6 Feb 2020 Zeyue Xue, Shuang Luo, Chao Wu, Pan Zhou, Kaigui Bian, Wei Du

Peer-to-peer knowledge transfer in distributed environments has emerged as a promising method since it could accelerate learning and improve team-wide performance without relying on pre-trained teachers in deep reinforcement learning.

Transfer Learning

Prepaid or Postpaid? That is the question. Novel Methods of Subscription Type Prediction in Mobile Phone Services

no code implementations30 Jun 2017 Yongjun Liao, Wei Du, Márton Karsai, Carlos Sarraute, Martin Minnoni, Eric Fleury

Our study reveals that (a) postpaid customers are more active in terms of service usage and (b) there are strong structural correlations in the mobile phone call network as connections between customers of the same subscription type are much more frequent than those between customers of different subscription types.

General Classification Marketing +1

Robust Order Scheduling in the Fashion Industry: A Multi-Objective Optimization Approach

no code implementations1 Feb 2017 Wei Du, Yang Tang, Sunney Yung Sun Leung, Le Tong, Athanasios V. Vasilakos, Feng Qian

In the fashion industry, order scheduling focuses on the assignment of production orders to appropriate production lines.

Scheduling

Differential Evolution with Event-Triggered Impulsive Control

no code implementations17 Dec 2015 Wei Du, Sunney Yung Sun Leung, Yang Tang, Athanasios V. Vasilakos

In this paper, an event-triggered impulsive control scheme (ETI) is introduced to improve the performance of DE.

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