Search Results for author: Haoxiang Wang

Found 28 papers, 10 papers with code

Den-SOFT: Dense Space-Oriented Light Field DataseT for 6-DOF Immersive Experience

no code implementations15 Mar 2024 Xiaohang Yu, Zhengxian Yang, Shi Pan, Yuqi Han, Haoxiang Wang, Jun Zhang, Shi Yan, Borong Lin, Lei Yang, Tao Yu, Lu Fang

We have built a custom mobile multi-camera large-space dense light field capture system, which provides a series of high-quality and sufficiently dense light field images for various scenarios.

3D Reconstruction 3D Scene Reconstruction +1

Arithmetic Control of LLMs for Diverse User Preferences: Directional Preference Alignment with Multi-Objective Rewards

1 code implementation28 Feb 2024 Haoxiang Wang, Yong Lin, Wei Xiong, Rui Yang, Shizhe Diao, Shuang Qiu, Han Zhao, Tong Zhang

Additionally, DPA models user preferences as directions (i. e., unit vectors) in the reward space to achieve user-dependent preference control.

Enhancing Compositional Generalization via Compositional Feature Alignment

1 code implementation5 Feb 2024 Haoxiang Wang, Haozhe Si, Huajie Shao, Han Zhao

To delve into the CG challenge, we develop CG-Bench, a suite of CG benchmarks derived from existing real-world image datasets, and observe that the prevalent pretraining-finetuning paradigm on foundational models, such as CLIP and DINOv2, struggles with the challenge.

Invariant-Feature Subspace Recovery: A New Class of Provable Domain Generalization Algorithms

1 code implementation2 Nov 2023 Haoxiang Wang, Gargi Balasubramaniam, Haozhe Si, Bo Li, Han Zhao

First, in the binary classification setup of Rosenfeld et al. (2021), we show that our first algorithm, ISR-Mean, can identify the subspace spanned by invariant features from the first-order moments of the class-conditional distributions, and achieve provable domain generalization with $d_s+1$ training environments.

Binary Classification Domain Generalization +2

Gradual Domain Adaptation: Theory and Algorithms

1 code implementation20 Oct 2023 Yifei He, Haoxiang Wang, Bo Li, Han Zhao

Unsupervised domain adaptation (UDA) adapts a model from a labeled source domain to an unlabeled target domain in a one-off way.

Unsupervised Domain Adaptation

Mitigating the Alignment Tax of RLHF

no code implementations12 Sep 2023 Yong Lin, Hangyu Lin, Wei Xiong, Shizhe Diao, Jianmeng Liu, Jipeng Zhang, Rui Pan, Haoxiang Wang, Wenbin Hu, Hanning Zhang, Hanze Dong, Renjie Pi, Han Zhao, Nan Jiang, Heng Ji, Yuan YAO, Tong Zhang

Building on the analysis and the observation that averaging different layers of the transformer leads to significantly different reward-tax trade-offs, we propose Adaptive Model Averaging (AMA) to adaptively find various combination ratios of model layers.

Common Sense Reasoning Continual Learning

ImmersiveNeRF: Hybrid Radiance Fields for Unbounded Immersive Light Field Reconstruction

no code implementations4 Sep 2023 Xiaohang Yu, Haoxiang Wang, Yuqi Han, Lei Yang, Tao Yu, Qionghai Dai

This paper proposes a hybrid radiance field representation for unbounded immersive light field reconstruction which supports high-quality rendering and aggressive view extrapolation.

Segmentation

Federated Learning with Classifier Shift for Class Imbalance

no code implementations11 Apr 2023 Yunheng Shen, Haoxiang Wang, Hairong Lv

Federated learning aims to learn a global model collaboratively while the training data belongs to different clients and is not allowed to be exchanged.

Federated Learning

AuE-IPA: An AU Engagement Based Infant Pain Assessment Method

no code implementations9 Dec 2022 Mingze Sun, Haoxiang Wang, Wei Yao, Jiawang Liu

Recent studies have found that pain in infancy has a significant impact on infant development, including psychological problems, possible brain injury, and pain sensitivity in adulthood.

Predicting Properties of Quantum Systems with Conditional Generative Models

1 code implementation30 Nov 2022 Haoxiang Wang, Maurice Weber, Josh Izaac, Cedric Yen-Yu Lin

For many ground states of gapped Hamiltonians, generative models can learn from measurements of a single quantum state to reconstruct the state accurately enough to predict local observables.

Attention Based Relation Network for Facial Action Units Recognition

no code implementations23 Oct 2022 Yao Wei, Haoxiang Wang, Mingze Sun, Jiawang Liu

In this paper, we propose a novel Attention Based Relation Network (ABRNet) for AU recognition, which can automatically capture AU relations without unnecessary or even disturbing predefined rules.

Relation Relation Network

Future Gradient Descent for Adapting the Temporal Shifting Data Distribution in Online Recommendation Systems

no code implementations2 Sep 2022 Mao Ye, Ruichen Jiang, Haoxiang Wang, Dhruv Choudhary, Xiaocong Du, Bhargav Bhushanam, Aryan Mokhtari, Arun Kejariwal, Qiang Liu

One of the key challenges of learning an online recommendation model is the temporal domain shift, which causes the mismatch between the training and testing data distribution and hence domain generalization error.

Domain Generalization Recommendation Systems

Asynchronous Training Schemes in Distributed Learning with Time Delay

no code implementations28 Aug 2022 Haoxiang Wang, Zhanhong Jiang, Chao Liu, Soumik Sarkar, Dongxiang Jiang, Young M. Lee

In the context of distributed deep learning, the issue of stale weights or gradients could result in poor algorithmic performance.

Understanding Gradual Domain Adaptation: Improved Analysis, Optimal Path and Beyond

2 code implementations18 Apr 2022 Haoxiang Wang, Bo Li, Han Zhao

Gradual domain adaptation (GDA), on the other hand, assumes a path of $(T-1)$ unlabeled intermediate domains bridging the source and target, and aims to provide better generalization in the target domain by leveraging the intermediate ones.

Unsupervised Domain Adaptation

Global Convergence of MAML and Theory-Inspired Neural Architecture Search for Few-Shot Learning

1 code implementation CVPR 2022 Haoxiang Wang, Yite Wang, Ruoyu Sun, Bo Li

We show that the performance of MetaNTK-NAS is comparable or better than the state-of-the-art NAS method designed for few-shot learning while enjoying more than 100x speedup.

Few-Shot Learning Neural Architecture Search

Provable Domain Generalization via Invariant-Feature Subspace Recovery

1 code implementation30 Jan 2022 Haoxiang Wang, Haozhe Si, Bo Li, Han Zhao

Our first algorithm, ISR-Mean, can identify the subspace spanned by invariant features from the first-order moments of the class-conditional distributions, and achieve provable domain generalization with $d_s+1$ training environments under the data model of Rosenfeld et al. (2021).

Domain Generalization

Bridging Multi-Task Learning and Meta-Learning: Towards Efficient Training and Effective Adaptation

1 code implementation16 Jun 2021 Haoxiang Wang, Han Zhao, Bo Li

Despite the subtle difference between MTL and meta-learning in the problem formulation, both learning paradigms share the same insight that the shared structure between existing training tasks could lead to better generalization and adaptation.

Few-Shot Image Classification Meta-Learning +1

Privacy Preserving in Non-Intrusive Load Monitoring: A Differential Privacy Perspective

no code implementations12 Nov 2020 Haoxiang Wang, Jiasheng Zhang, Chenbei Lu, Chenye Wu

In this paper, we cast one-shot non-intrusive load monitoring (NILM) in the compressive sensing framework, and bridge the gap between theoretical accuracy of NILM inference and differential privacy's parameters.

Compressive Sensing Non-Intrusive Load Monitoring +2

Global Convergence and Generalization Bound of Gradient-Based Meta-Learning with Deep Neural Nets

2 code implementations25 Jun 2020 Haoxiang Wang, Ruoyu Sun, Bo Li

Gradient-based meta-learning (GBML) with deep neural nets (DNNs) has become a popular approach for few-shot learning.

Few-Shot Learning

Robust Data-driven Profile-based Pricing Schemes

no code implementations12 Dec 2019 Jingshi Cui, Haoxiang Wang, Chenye Wu, Yang Yu

To enable an efficient electricity market, a good pricing scheme is of vital importance.

Clustering

Learning Positive Functions with Pseudo Mirror Descent

no code implementations NeurIPS 2019 Yingxiang Yang, Haoxiang Wang, Negar Kiyavash, Niao He

The nonparametric learning of positive-valued functions appears widely in machine learning, especially in the context of estimating intensity functions of point processes.

Computational Efficiency Point Processes

Vulnerability Analysis for Data Driven Pricing Schemes

no code implementations18 Nov 2019 Jingshi Cui, Haoxiang Wang, Chenye Wu, Yang Yu

In this paper, from an adversarial machine learning point of view, we examine the vulnerability of data-driven electricity market design.

BIG-bench Machine Learning Clustering

A Novel VHR Image Change Detection Algorithm Based on Image Fusion and Fuzzy C-Means Clustering

no code implementations22 Jun 2017 Rongcui Dong, Haoxiang Wang

This thesis describes a study to perform change detection on Very High Resolution satellite images using image fusion based on 2D Discrete Wavelet Transform and Fuzzy C-Means clustering algorithm.

Change Detection Clustering

Super-resolution Reconstruction of SAR Image based on Non-Local Means Denoising Combined with BP Neural Network

no code implementations14 Dec 2016 Zeling Wu, Haoxiang Wang

In this article, we propose a super-resolution method to resolve the problem of image low spatial because of the limitation of imaging devices.

Denoising Super-Resolution

Multiple kernel multivariate performance learning using cutting plane algorithm

no code implementations25 Aug 2015 Jingbin Wang, Haoxiang Wang, Yihua Zhou, Nancy McDonald

The learning of the classifier parameter and the kernel weight are unified in a single objective function considering to minimize the upper boundary of the given multivariate performance measure.

General Classification

Image tag completion by local learning

no code implementations18 Aug 2015 Jing-Yan Wang, Yihua Zhou, Haoxiang Wang, Xiaohong Yang, Feng Yang, Austin Peterson

The problem of tag completion is to learn the missing tags of an image.

TAG

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