Search Results for author: Gang Wu

Found 40 papers, 15 papers with code

Hybrid Cost Volume for Memory-Efficient Optical Flow

1 code implementation6 Sep 2024 Yang Zhao, Gangwei Xu, Gang Wu

Compared to the recurrent flow methods based the all-pairs cost volumes, our HCVFlow significantly reduces memory consumption while ensuring high accuracy.

4k Optical Flow Estimation

Random Time-hopping Secure Ranging Strategy Against Distance-Reduction Attacks in UWB

no code implementations10 Jun 2024 Wenlong Gou, Chuanhang Yu, Gang Wu

In order to mitigate the distance reduction attack in Ultra-Wide Band (UWB) ranging, this paper proposes a secure ranging scheme based on a random time-hopping mechanism without redundant signaling overhead.

Learning from Students: Applying t-Distributions to Explore Accurate and Efficient Formats for LLMs

1 code implementation6 May 2024 Jordan Dotzel, Yuzong Chen, Bahaa Kotb, Sushma Prasad, Gang Wu, Sheng Li, Mohamed S. Abdelfattah, Zhiru Zhang

Using this format as a high-accuracy reference, we then propose augmenting E2M1 with two variants of supernormal support for higher model accuracy.

Quantization

Hybrid Bit and Semantic Communications

no code implementations30 Apr 2024 Kaiwen Yu, Renhe Fan, Gang Wu, Zhijin Qin

Semantic communication technology is regarded as a method surpassing the Shannon limit of bit transmission, capable of effectively enhancing transmission efficiency.

Semantic Communication

Exploiting Self-Supervised Constraints in Image Super-Resolution

2 code implementations30 Mar 2024 Gang Wu, Junjun Jiang, Kui Jiang, Xianming Liu

Recent advances in self-supervised learning, predominantly studied in high-level visual tasks, have been explored in low-level image processing.

Image Super-Resolution Self-Supervised Learning

Transforming Image Super-Resolution: A ConvFormer-based Efficient Approach

1 code implementation11 Jan 2024 Gang Wu, Junjun Jiang, Junpeng Jiang, Xianming Liu

Recent progress in single-image super-resolution (SISR) has achieved remarkable performance, yet the computational costs of these methods remain a challenge for deployment on resource-constrained devices.

Image Super-Resolution

VaQuitA: Enhancing Alignment in LLM-Assisted Video Understanding

no code implementations4 Dec 2023 Yizhou Wang, Ruiyi Zhang, Haoliang Wang, Uttaran Bhattacharya, Yun Fu, Gang Wu

Recent advancements in language-model-based video understanding have been progressing at a remarkable pace, spurred by the introduction of Large Language Models (LLMs).

Language Modelling Question Answering +2

Token-Level Adversarial Prompt Detection Based on Perplexity Measures and Contextual Information

no code implementations20 Nov 2023 Zhengmian Hu, Gang Wu, Saayan Mitra, Ruiyi Zhang, Tong Sun, Heng Huang, Viswanathan Swaminathan

Our work aims to address this concern by introducing a novel approach to detecting adversarial prompts at a token level, leveraging the LLM's capability to predict the next token's probability.

AutoDAN: Interpretable Gradient-Based Adversarial Attacks on Large Language Models

1 code implementation23 Oct 2023 Sicheng Zhu, Ruiyi Zhang, Bang An, Gang Wu, Joe Barrow, Zichao Wang, Furong Huang, Ani Nenkova, Tong Sun

Safety alignment of Large Language Models (LLMs) can be compromised with manual jailbreak attacks and (automatic) adversarial attacks.

Adversarial Attack Blocking +1

Learning from History: Task-agnostic Model Contrastive Learning for Image Restoration

2 code implementations12 Sep 2023 Gang Wu, Junjun Jiang, Kui Jiang, Xianming Liu

Our approach, named Model Contrastive Learning for Image Restoration (MCLIR), rejuvenates latency models as negative models, making it compatible with diverse image restoration tasks.

Contrastive Learning Image Dehazing +4

FLIQS: One-Shot Mixed-Precision Floating-Point and Integer Quantization Search

no code implementations7 Aug 2023 Jordan Dotzel, Gang Wu, Andrew Li, Muhammad Umar, Yun Ni, Mohamed S. Abdelfattah, Zhiru Zhang, Liqun Cheng, Martin G. Dixon, Norman P. Jouppi, Quoc V. Le, Sheng Li

With integer models, we increase the accuracy of ResNet-18 on ImageNet by 1. 31% and ResNet-50 by 0. 90% with equivalent model cost over previous methods.

Quantization

Fully $1\times1$ Convolutional Network for Lightweight Image Super-Resolution

1 code implementation30 Jul 2023 Gang Wu, Junjun Jiang, Kui Jiang, Xianming Liu

By incorporating a parameter-free spatial-shift operation, it equips the fully $1\times1$ convolutional network with powerful representation capability while impressive computational efficiency.

Computational Efficiency Image Super-Resolution

A Restarted Large-Scale Spectral Clustering with Self-Guiding and Block Diagonal Representation

no code implementations27 Jun 2023 Yongyan Guo, Gang Wu

Specifically, our framework has a potential boost for clustering algorithms and works well even using an initial guess chosen randomly.

Clustering

Two-Way Semantic Transmission of Images without Feedback

1 code implementation15 Jun 2023 Kaiwen Yu, Qi He, Gang Wu

As a competitive technology for 6G, semantic communications can significantly improve transmission efficiency.

Generative Adversarial Network Semantic Communication

Syntax-aware Hybrid prompt model for Few-shot multi-modal sentiment analysis

no code implementations2 Jun 2023 Zikai Zhou, Haisong Feng, Baiyou Qiao, Gang Wu, Donghong Han

Multimodal Sentiment Analysis (MSA) has been a popular topic in natural language processing nowadays, at both sentence and aspect level.

Multimodal Sentiment Analysis Sentence

Dual-Granularity Contrastive Learning for Session-based Recommendation

no code implementations18 Apr 2023 Zihan Wang, Gang Wu, Haotong Wang

At factor-level, we employ Disentangled Representation Learning to obtain finer-grained data(e. g. factor-level embeddings), with which we can construct factor-level convolution channels.

Contrastive Learning Data Augmentation +2

Incorporating Transformer Designs into Convolutions for Lightweight Image Super-Resolution

1 code implementation25 Mar 2023 Gang Wu, Junjun Jiang, Yuanchao Bai, Xianming Liu

Building upon the NA module, we propose a lightweight single image super-resolution (SISR) network named TCSR.

Image Super-Resolution

Distributed Two-tier DRL Framework for Cell-Free Network: Association, Beamforming and Power Allocation

1 code implementation22 Mar 2023 Kaiwen Yu, Chonghao Zhao, Gang Wu, Geoffrey Ye Li

Intelligent wireless networks have long been expected to have self-configuration and self-optimization capabilities to adapt to various environments and demands.

TripLe: Revisiting Pretrained Model Reuse and Progressive Learning for Efficient Vision Transformer Scaling and Searching

no code implementations ICCV 2023 Cheng Fu, Hanxian Huang, Zixuan Jiang, Yun Ni, Lifeng Nai, Gang Wu, Liqun Cheng, Yanqi Zhou, Sheng Li, Andrew Li, Jishen Zhao

One promising way to accelerate transformer training is to reuse small pretrained models to initialize the transformer, as their existing representation power facilitates faster model convergence.

Knowledge Distillation Neural Architecture Search

ESIE-BERT: Enriching Sub-words Information Explicitly with BERT for Joint Intent Classification and SlotFilling

no code implementations27 Nov 2022 Yu Guo, Zhilong Xie, Xingyan Chen, Huangen Chen, Leilei Wang, Huaming Du, Shaopeng Wei, Yu Zhao, Qing Li, Gang Wu

We address the problem by introducing a novel joint method on top of BERT which explicitly models the multiple sub-tokens features after wordpiece tokenization, thereby contributing to the two tasks.

intent-classification Intent Classification +5

Show Me What I Like: Detecting User-Specific Video Highlights Using Content-Based Multi-Head Attention

no code implementations18 Jul 2022 Uttaran Bhattacharya, Gang Wu, Stefano Petrangeli, Viswanathan Swaminathan, Dinesh Manocha

We propose a method to detect individualized highlights for users on given target videos based on their preferred highlight clips marked on previous videos they have watched.

Highlight Detection

GLaMa: Joint Spatial and Frequency Loss for General Image Inpainting

no code implementations15 May 2022 Zeyu Lu, Junjun Jiang, Junqin Huang, Gang Wu, Xianming Liu

Our proposed GLaMa can better capture different types of missing information by using more types of masks.

Image Inpainting SSIM

Effectively Using Long and Short Sessions for Multi-Session-based Recommendations

no code implementations9 May 2022 Zihan Wang, Gang Wu, Yan Wang

The RNN often used in previous work is not suitable to process short sessions, because RNN only focuses on the sequential relationship, which we find is not the only relationship between items in short sessions.

Session-Based Recommendations

Online MAP Inference and Learning for Nonsymmetric Determinantal Point Processes

no code implementations29 Nov 2021 Aravind Reddy, Ryan A. Rossi, Zhao Song, Anup Rao, Tung Mai, Nedim Lipka, Gang Wu, Eunyee Koh, Nesreen Ahmed

In this paper, we introduce the online and streaming MAP inference and learning problems for Non-symmetric Determinantal Point Processes (NDPPs) where data points arrive in an arbitrary order and the algorithms are constrained to use a single-pass over the data as well as sub-linear memory.

Point Processes valid

A Practical Contrastive Learning Framework for Single-Image Super-Resolution

1 code implementation27 Nov 2021 Gang Wu, Junjun Jiang, Xianming Liu

Contrastive learning has achieved remarkable success on various high-level tasks, but there are fewer contrastive learning-based methods proposed for low-level tasks.

Contrastive Learning Image Restoration +1

HighlightMe: Detecting Highlights from Human-Centric Videos

no code implementations ICCV 2021 Uttaran Bhattacharya, Gang Wu, Stefano Petrangeli, Viswanathan Swaminathan, Dinesh Manocha

We train our network to map the activity- and interaction-based latent structural representations of the different modalities to per-frame highlight scores based on the representativeness of the frames.

Stability of singular solutions to the Navier-Stokes system

no code implementations23 Dec 2020 Marco Cannone, Grzegorz Karch, Dominika Pilarczyk, Gang Wu

We present results on asymptotic properties of such solutions either for large values of the space variables (so called the far-field asymptotics) or for large values of time.

Analysis of PDEs 35A21, 35B40, 35C06, 35Q30, 76D05

Structured Policy Iteration for Linear Quadratic Regulator

no code implementations ICML 2020 Youngsuk Park, Ryan A. Rossi, Zheng Wen, Gang Wu, Handong Zhao

In this paper, we introduce the \textit{Structured Policy Iteration} (S-PI) for LQR, a method capable of deriving a structured linear policy.

Scalable Bid Landscape Forecasting in Real-time Bidding

no code implementations18 Jan 2020 Aritra Ghosh, Saayan Mitra, Somdeb Sarkhel, Jason Xie, Gang Wu, Viswanathan Swaminathan

The highest bidding advertiser wins but pays only the second-highest bid (known as the winning price).

regression

Deep Relational Factorization Machines

no code implementations25 Sep 2019 Hongchang Gao, Gang Wu, Ryan Rossi, Viswanathan Swaminathan, Heng Huang

Factorization Machines (FMs) is an important supervised learning approach due to its unique ability to capture feature interactions when dealing with high-dimensional sparse data.

Higher-Order Ranking and Link Prediction: From Closing Triangles to Closing Higher-Order Motifs

no code implementations12 Jun 2019 Ryan A. Rossi, Anup Rao, Sungchul Kim, Eunyee Koh, Nesreen K. Ahmed, Gang Wu

In this work, we investigate higher-order network motifs and develop techniques based on the notion of closing higher-order motifs that move beyond closing simple triangles.

Link Prediction

EXTRA: An Exact First-Order Algorithm for Decentralized Consensus Optimization

no code implementations24 Apr 2014 Wei Shi, Qing Ling, Gang Wu, Wotao Yin

In this paper, we develop a decentralized algorithm for the consensus optimization problem $$\min\limits_{x\in\mathbb{R}^p}~\bar{f}(x)=\frac{1}{n}\sum\limits_{i=1}^n f_i(x),$$ which is defined over a connected network of $n$ agents, where each function $f_i$ is held privately by agent $i$ and encodes the agent's data and objective.

Optimization and Control

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