Search Results for author: Zehua Zhang

Found 11 papers, 3 papers with code

Enhancing LLM Factual Accuracy with RAG to Counter Hallucinations: A Case Study on Domain-Specific Queries in Private Knowledge-Bases

1 code implementation15 Mar 2024 Jiarui Li, Ye Yuan, Zehua Zhang

We proposed an end-to-end system design towards utilizing Retrieval Augmented Generation (RAG) to improve the factual accuracy of Large Language Models (LLMs) for domain-specific and time-sensitive queries related to private knowledge-bases.

Retrieval

Pretraining Strategy for Neural Potentials

no code implementations24 Feb 2024 Zehua Zhang, Zijie Li, Amir Barati Farimani

We propose a mask pretraining method for Graph Neural Networks (GNNs) to improve their performance on fitting potential energy surfaces, particularly in water systems.

Denoising

Incorporating Multi-Target in Multi-Stage Speech Enhancement Model for Better Generalization

no code implementations9 Jul 2021 Lu Zhang, Mingjiang Wang, Andong Li, Zehua Zhang, Xuyi Zhuang

In this study, we make full use of the contribution of multi-target joint learning to the model generalization capability, and propose a lightweight and low-computing dilated convolutional network (DCN) model for a more robust speech denoising task.

Denoising Speech Denoising +1

Deep Interaction between Masking and Mapping Targets for Single-Channel Speech Enhancement

no code implementations9 Jun 2021 Lu Zhang, Mingjiang Wang, Zehua Zhang, Xuyi Zhuang

In this paper, we propose a multi-branch dilated convolutional network (DCN) to simultaneously enhance the magnitude and phase of noisy speech.

Denoising Speech Enhancement

Hierarchically Decoupled Spatial-Temporal Contrast for Self-supervised Video Representation Learning

no code implementations23 Nov 2020 Zehua Zhang, David Crandall

We present a novel technique for self-supervised video representation learning by: (a) decoupling the learning objective into two contrastive subtasks respectively emphasizing spatial and temporal features, and (b) performing it hierarchically to encourage multi-scale understanding.

Action Recognition Contrastive Learning +1

Kalman Filtering Attention for User Behavior Modeling in CTR Prediction

no code implementations NeurIPS 2020 Hu Liu, Jing Lu, Xiwei Zhao, Sulong Xu, Hao Peng, Yutong Liu, Zehua Zhang, Jian Li, Junsheng Jin, Yongjun Bao, Weipeng Yan

First, conventional attentions mostly limit the attention field only to a single user's behaviors, which is not suitable in e-commerce where users often hunt for new demands that are irrelevant to any historical behaviors.

Click-Through Rate Prediction

Category-Specific CNN for Visual-aware CTR Prediction at JD.com

no code implementations18 Jun 2020 Hu Liu, Jing Lu, Hao Yang, Xiwei Zhao, Sulong Xu, Hao Peng, Zehua Zhang, Wenjie Niu, Xiaokun Zhu, Yongjun Bao, Weipeng Yan

Existing algorithms usually extract visual features using off-the-shelf Convolutional Neural Networks (CNNs) and late fuse the visual and non-visual features for the finally predicted CTR.

Click-Through Rate Prediction

Interaction Graphs for Object Importance Estimation in On-road Driving Videos

no code implementations12 Mar 2020 Zehua Zhang, Ashish Tawari, Sujitha Martin, David Crandall

A vehicle driving along the road is surrounded by many objects, but only a small subset of them influence the driver's decisions and actions.

Autonomous Driving Decision Making +1

A Self Validation Network for Object-Level Human Attention Estimation

1 code implementation NeurIPS 2019 Zehua Zhang, Chen Yu, David Crandall

Due to the foveated nature of the human vision system, people can focus their visual attention on a small region of their visual field at a time, which usually contains only a single object.

Object

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