Search Results for author: Haokun Chen

Found 16 papers, 4 papers with code

DiffsFormer: A Diffusion Transformer on Stock Factor Augmentation

no code implementations5 Feb 2024 Yuan Gao, Haokun Chen, Xiang Wang, Zhicai Wang, Xue Wang, Jinyang Gao, Bolin Ding

Our research demonstrates the efficacy of leveraging AIGS and the DiffsFormer architecture to mitigate data scarcity in stock forecasting tasks.

Building Variable-sized Models via Learngene Pool

no code implementations10 Dec 2023 Boyu Shi, Shiyu Xia, Xu Yang, Haokun Chen, Zhiqiang Kou, Xin Geng

To overcome these challenges, motivated by the recently proposed Learngene framework, we propose a novel method called Learngene Pool.

Transformer as Linear Expansion of Learngene

1 code implementation9 Dec 2023 Shiyu Xia, Miaosen Zhang, Xu Yang, Ruiming Chen, Haokun Chen, Xin Geng

Under the situation where we need to produce models of varying depths adapting for different resource constraints, TLEG achieves comparable results while reducing around 19x parameters stored to initialize these models and around 5x pre-training costs, in contrast to the pre-training and fine-tuning approach.

Manipulating the Label Space for In-Context Classification

no code implementations1 Dec 2023 Haokun Chen, Xu Yang, Yuhang Huang, Zihan Wu, Jing Wang, Xin Geng

Specifically, using our approach on ImageNet, we increase accuracy from 74. 70\% in a 4-shot setting to 76. 21\% with just 2 shots.

Classification Contrastive Learning +2

FedDAT: An Approach for Foundation Model Finetuning in Multi-Modal Heterogeneous Federated Learning

no code implementations21 Aug 2023 Haokun Chen, Yao Zhang, Denis Krompass, Jindong Gu, Volker Tresp

FedDAT is the first approach that enables an efficient distributed finetuning of foundation models for a variety of heterogeneous Vision-Language tasks.

Federated Learning Knowledge Distillation +1

FedPop: Federated Population-based Hyperparameter Tuning

no code implementations16 Aug 2023 Haokun Chen, Denis Krompass, Jindong Gu, Volker Tresp

Similar to conventional ML pipelines, the client local optimization and server aggregation procedure in FL are sensitive to the hyperparameter (HP) selection.

Computational Efficiency Evolutionary Algorithms +1

Exploring Diverse In-Context Configurations for Image Captioning

1 code implementation NeurIPS 2023 Xu Yang, Yongliang Wu, Mingzhuo Yang, Haokun Chen, Xin Geng

After discovering that Language Models (LMs) can be good in-context few-shot learners, numerous strategies have been proposed to optimize in-context sequence configurations.

Image Captioning In-Context Learning

FRAug: Tackling Federated Learning with Non-IID Features via Representation Augmentation

no code implementations ICCV 2023 Haokun Chen, Ahmed Frikha, Denis Krompass, Jindong Gu, Volker Tresp

Real-world applications usually involve a distribution shift across the datasets of the different clients, which hurts the generalization ability of the clients to unseen samples from their respective data distributions.

Federated Learning

Studying the Impact of Data Disclosure Mechanism in Recommender Systems via Simulation

no code implementations1 Apr 2022 Ziqian Chen, Fei Sun, Yifan Tang, Haokun Chen, Jinyang Gao, Bolin Ding

Then we study users' privacy decision making under different data disclosure mechanisms and recommendation models, and how their data disclosure decisions affect the recommender system's performance.

Decision Making Federated Learning +2

Towards Data-Free Domain Generalization

1 code implementation9 Oct 2021 Ahmed Frikha, Haokun Chen, Denis Krompaß, Thomas Runkler, Volker Tresp

In particular, we address the question: How can knowledge contained in models trained on different source domains be merged into a single model that generalizes well to unseen target domains, in the absence of source and target domain data?

Data-free Knowledge Distillation Domain Generalization

PURE: An Uncertainty-aware Recommendation Framework for Maximizing Expected Posterior Utility of Platform

no code implementations1 Jan 2021 Haokun Chen, Zhaoyang Liu, Chen Xu, Ziqian Chen, Jinyang Gao, Bolin Ding

In this paper, we propose a novel recommendation framework which effectively utilizes the information of user uncertainty over different item dimensions and explicitly takes into consideration the impact of display policy on user in order to achieve maximal expected posterior utility for the platform.

Interactive Recommender System via Knowledge Graph-enhanced Reinforcement Learning

no code implementations18 Jun 2020 Sijin Zhou, Xinyi Dai, Haokun Chen, Wei-Nan Zhang, Kan Ren, Ruiming Tang, Xiuqiang He, Yong Yu

Interactive recommender system (IRS) has drawn huge attention because of its flexible recommendation strategy and the consideration of optimal long-term user experiences.

Decision Making Recommendation Systems +3

Towards Precise Intra-camera Supervised Person Re-identification

no code implementations12 Feb 2020 Menglin Wang, Baisheng Lai, Haokun Chen, Jianqiang Huang, Xiaojin Gong, Xian-Sheng Hua

Our approach performs even comparable to state-of-the-art fully supervised methods in two of the datasets.

Person Re-Identification

Large-scale Interactive Recommendation with Tree-structured Policy Gradient

no code implementations14 Nov 2018 Haokun Chen, Xinyi Dai, Han Cai, Wei-Nan Zhang, Xuejian Wang, Ruiming Tang, Yuzhou Zhang, Yong Yu

Reinforcement learning (RL) has recently been introduced to interactive recommender systems (IRS) because of its nature of learning from dynamic interactions and planning for long-run performance.

Clustering Recommendation Systems +1

Deep Reinforcement Learning based Recommendation with Explicit User-Item Interactions Modeling

5 code implementations29 Oct 2018 Feng Liu, Ruiming Tang, Xutao Li, Wei-Nan Zhang, Yunming Ye, Haokun Chen, Huifeng Guo, Yuzhou Zhang

The DRR framework treats recommendation as a sequential decision making procedure and adopts an "Actor-Critic" reinforcement learning scheme to model the interactions between the users and recommender systems, which can consider both the dynamic adaptation and long-term rewards.

Collaborative Filtering Decision Making +4

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