Search Results for author: Lei Meng

Found 15 papers, 5 papers with code

Towards Better Text-to-Image Generation Alignment via Attention Modulation

no code implementations22 Apr 2024 Yihang Wu, Xiao Cao, Kaixin Li, Zitan Chen, Haonan Wang, Lei Meng, Zhiyong Huang

To achieve this, we incorporate a temperature control mechanism within the early phases of the self-attention modules to mitigate entity leakage issues.

Beyond Sparse Rewards: Enhancing Reinforcement Learning with Language Model Critique in Text Generation

no code implementations14 Jan 2024 Meng Cao, Lei Shu, Lei Yu, Yun Zhu, Nevan Wichers, Yinxiao Liu, Lei Meng

We investigate this approach under two different settings: one where the policy model is smaller and is paired with a more powerful critic model, and another where a single language model fulfills both roles.

Language Modelling reinforcement-learning +2

Plug-in Diffusion Model for Sequential Recommendation

1 code implementation5 Jan 2024 Haokai Ma, Ruobing Xie, Lei Meng, Xin Chen, Xu Zhang, Leyu Lin, Zhanhui Kang

To address this issue, this paper presents a novel Plug-in Diffusion Model for Recommendation (PDRec) framework, which employs the diffusion model as a flexible plugin to jointly take full advantage of the diffusion-generating user preferences on all items.

Image Generation Model Optimization +1

Fusion-Eval: Integrating Evaluators with LLMs

no code implementations15 Nov 2023 Lei Shu, Nevan Wichers, Liangchen Luo, Yun Zhu, Yinxiao Liu, Jindong Chen, Lei Meng

Evaluating natural language systems poses significant challenges, particularly in the realms of natural language understanding and high-level reasoning.

Natural Language Understanding

Critique Ability of Large Language Models

no code implementations7 Oct 2023 Liangchen Luo, Zi Lin, Yinxiao Liu, Lei Shu, Yun Zhu, Jingbo Shang, Lei Meng

In the era of large language models (LLMs), this study explores the ability of LLMs to deliver accurate critiques across various tasks.

Code Completion Decision Making +3

Class-level Structural Relation Modelling and Smoothing for Visual Representation Learning

1 code implementation8 Aug 2023 Zitan Chen, Zhuang Qi, Xiao Cao, Xiangxian Li, Xiangxu Meng, Lei Meng

Representation learning for images has been advanced by recent progress in more complex neural models such as the Vision Transformers and new learning theories such as the structural causal models.

Graph Sampling Relation +1

Cross-Silo Prototypical Calibration for Federated Learning with Non-IID Data

1 code implementation7 Aug 2023 Zhuang Qi, Lei Meng, Zitan Chen, Han Hu, Hui Lin, Xiangxu Meng

To address this issue, this paper presents a cross-silo prototypical calibration method (FedCSPC), which takes additional prototype information from the clients to learn a unified feature space on the server side.

Contrastive Learning Federated Learning +1

RewriteLM: An Instruction-Tuned Large Language Model for Text Rewriting

1 code implementation25 May 2023 Lei Shu, Liangchen Luo, Jayakumar Hoskere, Yun Zhu, Yinxiao Liu, Simon Tong, Jindong Chen, Lei Meng

In this work, we develop new strategies for instruction tuning and reinforcement learning to better align LLMs for cross-sentence rewriting tasks using diverse wording and structures expressed through natural languages including 1) generating rewriting instruction data from Wiki edits and public corpus through instruction generation and chain-of-thought prompting; 2) collecting comparison data for reward model training through a new ranking function.

Language Modelling Large Language Model +3

Triple Sequence Learning for Cross-domain Recommendation

no code implementations11 Apr 2023 Haokai Ma, Ruobing Xie, Lei Meng, Xin Chen, Xu Zhang, Leyu Lin, Jie zhou

To address this issue, we present a novel framework, termed triple sequence learning for cross-domain recommendation (Tri-CDR), which jointly models the source, target, and mixed behavior sequences to highlight the global and target preference and precisely model the triple correlation in CDR.

Contrastive Learning

Multi-modal Video Chapter Generation

1 code implementation26 Sep 2022 Xiao Cao, Zitan Chen, Canyu Le, Lei Meng

On top of this dataset, we design an effective baseline specificlly for video chapters generation task.

Meta-Causal Feature Learning for Out-of-Distribution Generalization

no code implementations22 Aug 2022 Yuqing Wang, Xiangxian Li, Zhuang Qi, Jingyu Li, Xuelong Li, Xiangxu Meng, Lei Meng

Causal inference has become a powerful tool to handle the out-of-distribution (OOD) generalization problem, which aims to extract the invariant features.

Causal Inference Out-of-Distribution Generalization +1

Multi-source Domain Adaptation for Visual Sentiment Classification

no code implementations12 Jan 2020 Chuang Lin, Sicheng Zhao, Lei Meng, Tat-Seng Chua

Existing domain adaptation methods on visual sentiment classification typically are investigated under the single-source scenario, where the knowledge learned from a source domain of sufficient labeled data is transferred to the target domain of loosely labeled or unlabeled data.

Classification Domain Adaptation +4

Pairwise versus multiple network alignment

no code implementations13 Sep 2017 Vipin Vijayan, Shawn Gu, Eric Krebs, Lei Meng, Tijana Milenkovic

Just as the recent trend in the NA field, we also focus on global NA, which can be pairwise (PNA) and multiple (MNA).

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