Search Results for author: Xin Liu

Found 276 papers, 115 papers with code

The Ninth NTIRE 2024 Efficient Super-Resolution Challenge Report

1 code implementation16 Apr 2024 Bin Ren, Nancy Mehta, Radu Timofte, Hongyuan Yu, Cheng Wan, Yuxin Hong, Bingnan Han, Zhuoyuan Wu, Yajun Zou, Yuqing Liu, Jizhe Li, Keji He, Chao Fan, Heng Zhang, Xiaolin Zhang, Xuanwu Yin, Kunlong Zuo, Bohao Liao, Peizhe Xia, Long Peng, Zhibo Du, Xin Di, Wangkai Li, Yang Wang, Wei Zhai, Renjing Pei, Jiaming Guo, Songcen Xu, Yang Cao, ZhengJun Zha, Yan Wang, Yi Liu, Qing Wang, Gang Zhang, Liou Zhang, Shijie Zhao, Long Sun, Jinshan Pan, Jiangxin Dong, Jinhui Tang, Xin Liu, Min Yan, Menghan Zhou, Yiqiang Yan, Yixuan Liu, Wensong Chan, Dehua Tang, Dong Zhou, Li Wang, Lu Tian, Barsoum Emad, Bohan Jia, Junbo Qiao, Yunshuai Zhou, Yun Zhang, Wei Li, Shaohui Lin, Shenglong Zhou, Binbin Chen, Jincheng Liao, Suiyi Zhao, Zhao Zhang, Bo wang, Yan Luo, Yanyan Wei, Feng Li, Mingshen Wang, Yawei Li, Jinhan Guan, Dehua Hu, Jiawei Yu, Qisheng Xu, Tao Sun, Long Lan, Kele Xu, Xin Lin, Jingtong Yue, Lehan Yang, Shiyi Du, Lu Qi, Chao Ren, Zeyu Han, YuHan Wang, Chaolin Chen, Haobo Li, Mingjun Zheng, Zhongbao Yang, Lianhong Song, Xingzhuo Yan, Minghan Fu, Jingyi Zhang, Baiang Li, Qi Zhu, Xiaogang Xu, Dan Guo, Chunle Guo, Jiadi Chen, Huanhuan Long, Chunjiang Duanmu, Xiaoyan Lei, Jie Liu, Weilin Jia, Weifeng Cao, Wenlong Zhang, Yanyu Mao, Ruilong Guo, Nihao Zhang, Qian Wang, Manoj Pandey, Maksym Chernozhukov, Giang Le, Shuli Cheng, Hongyuan Wang, Ziyan Wei, Qingting Tang, Liejun Wang, Yongming Li, Yanhui Guo, Hao Xu, Akram Khatami-Rizi, Ahmad Mahmoudi-Aznaveh, Chih-Chung Hsu, Chia-Ming Lee, Yi-Shiuan Chou, Amogh Joshi, Nikhil Akalwadi, Sampada Malagi, Palani Yashaswini, Chaitra Desai, Ramesh Ashok Tabib, Ujwala Patil, Uma Mudenagudi

In sub-track 1, the practical runtime performance of the submissions was evaluated, and the corresponding score was used to determine the ranking.

Image Super-Resolution

DEGNN: Dual Experts Graph Neural Network Handling Both Edge and Node Feature Noise

1 code implementation14 Apr 2024 Tai Hasegawa, Sukwon Yun, Xin Liu, Yin Jun Phua, Tsuyoshi Murata

Leveraging these modified representations, DEGNN subsequently addresses downstream tasks, ensuring robustness against noise present in both edges and node features of real-world graphs.

Graph structure learning Self-Supervised Learning

Future-Proofing Class Incremental Learning

no code implementations4 Apr 2024 Quentin Jodelet, Xin Liu, Yin Jun Phua, Tsuyoshi Murata

Exemplar-Free Class Incremental Learning is a highly challenging setting where replay memory is unavailable.

Class Incremental Learning Incremental Learning

EventGround: Narrative Reasoning by Grounding to Eventuality-centric Knowledge Graphs

1 code implementation30 Mar 2024 Cheng Jiayang, Lin Qiu, Chunkit Chan, Xin Liu, Yangqiu Song, Zheng Zhang

In this work, we propose an initial comprehensive framework called EventGround, which aims to tackle the problem of grounding free-texts to eventuality-centric KGs for contextualized narrative reasoning.

Knowledge Graphs Language Modelling +2

Decentralized Stochastic Subgradient Methods for Nonsmooth Nonconvex Optimization

no code implementations18 Mar 2024 Siyuan Zhang, Nachuan Xiao, Xin Liu

Furthermore, we establish that our proposed framework encompasses a wide range of existing efficient decentralized subgradient methods, including decentralized stochastic subgradient descent (DSGD), DSGD with gradient-tracking technique (DSGD-T), and DSGD with momentum (DSGDm).

Generation is better than Modification: Combating High Class Homophily Variance in Graph Anomaly Detection

no code implementations15 Mar 2024 Rui Zhang, Dawei Cheng, Xin Liu, Jie Yang, Yi Ouyang, Xian Wu, Yefeng Zheng

We find that in graph anomaly detection, the homophily distribution differences between different classes are significantly greater than those in homophilic and heterophilic graphs.

Graph Anomaly Detection Graph Classification +1

Benchmarking Zero-Shot Robustness of Multimodal Foundation Models: A Pilot Study

1 code implementation15 Mar 2024 Chenguang Wang, Ruoxi Jia, Xin Liu, Dawn Song

We show that CLIP leads to a significant robustness drop compared to supervised ImageNet models on our benchmark, especially under synthetic distribution shift and adversarial attacks.

Benchmarking

Advancing Generalizable Remote Physiological Measurement through the Integration of Explicit and Implicit Prior Knowledge

1 code implementation11 Mar 2024 Yuting Zhang, Hao Lu, Xin Liu, Yingcong Chen, Kaishun Wu

Remote photoplethysmography (rPPG) is a promising technology that captures physiological signals from face videos, with potential applications in medical health, emotional computing, and biosecurity recognition.

Domain Generalization

Answering Diverse Questions via Text Attached with Key Audio-Visual Clues

no code implementations11 Mar 2024 Qilang Ye, Zitong Yu, Xin Liu

Audio-visual question answering (AVQA) requires reference to video content and auditory information, followed by correlating the question to predict the most precise answer.

Audio-visual Question Answering Audio-Visual Question Answering (AVQA) +3

ACT-MNMT Auto-Constriction Turning for Multilingual Neural Machine Translation

no code implementations11 Mar 2024 Shaojie Dai, Xin Liu, Ping Luo, Yue Yu

Large language model (LLM) has achieved promising performance in multilingual machine translation tasks through zero/few-shot prompts or prompt-tuning.

Language Modelling Large Language Model +2

Revisiting Edge Perturbation for Graph Neural Network in Graph Data Augmentation and Attack

no code implementations10 Mar 2024 Xin Liu, Yuxiang Zhang, Meng Wu, Mingyu Yan, Kun He, Wei Yan, Shirui Pan, Xiaochun Ye, Dongrui Fan

It can be categorized into two veins based on their effects on the performance of graph neural networks (GNNs), i. e., graph data augmentation and attack.

Data Augmentation

AUFormer: Vision Transformers are Parameter-Efficient Facial Action Unit Detectors

1 code implementation7 Mar 2024 Kaishen Yuan, Zitong Yu, Xin Liu, Weicheng Xie, Huanjing Yue, Jingyu Yang

Facial Action Units (AU) is a vital concept in the realm of affective computing, and AU detection has always been a hot research topic.

Facial Action Unit Detection Transfer Learning

Multi-modal Attribute Prompting for Vision-Language Models

no code implementations1 Mar 2024 Xin Liu, Jiamin Wu, Tianzhu Zhang

To address this issue, we propose a Multi-modal Attribute Prompting method (MAP) by jointly exploring textual attribute prompting, visual attribute prompting, and attribute-level alignment.

Attribute

A Simple yet Effective Network based on Vision Transformer for Camouflaged Object and Salient Object Detection

no code implementations29 Feb 2024 Chao Hao, Zitong Yu, Xin Liu, Jun Xu, Huanjing Yue, Jingyu Yang

Camouflaged object detection (COD) and salient object detection (SOD) are two distinct yet closely-related computer vision tasks widely studied during the past decades.

Object object-detection +2

FedUV: Uniformity and Variance for Heterogeneous Federated Learning

no code implementations27 Feb 2024 Ha Min Son, Moon-Hyun Kim, Tai-Myoung Chung, Chao Huang, Xin Liu

Based on this finding, we introduce two regularization terms for local training to continuously emulate IID settings: (1) variance in the dimension-wise probability distribution of the classifier and (2) hyperspherical uniformity of representations of the encoder.

Federated Learning

Convergence Analysis of Split Federated Learning on Heterogeneous Data

no code implementations23 Feb 2024 Pengchao Han, Chao Huang, Geng Tian, Ming Tang, Xin Liu

We further extend the analysis to non-convex objectives and where some clients may be unavailable during training.

Federated Learning

Safety of Multimodal Large Language Models on Images and Text

1 code implementation1 Feb 2024 Xin Liu, Yichen Zhu, Yunshi Lan, Chao Yang, Yu Qiao

In this paper, we systematically survey current efforts on the evaluation, attack, and defense of MLLMs' safety on images and text.

Fast Adversarial Training against Textual Adversarial Attacks

no code implementations23 Jan 2024 Yichen Yang, Xin Liu, Kun He

Based on the observation that the adversarial perturbations crafted by single-step and multi-step gradient ascent are similar, FAT uses single-step gradient ascent to craft adversarial examples in the embedding space to expedite the training process.

Adversarial Defense Adversarial Robustness

CANDLE: Iterative Conceptualization and Instantiation Distillation from Large Language Models for Commonsense Reasoning

1 code implementation14 Jan 2024 Weiqi Wang, Tianqing Fang, Chunyang Li, Haochen Shi, Wenxuan Ding, Baixuan Xu, Zhaowei Wang, Jiaxin Bai, Xin Liu, Jiayang Cheng, Chunkit Chan, Yangqiu Song

The sequential process of conceptualization and instantiation is essential to generalizable commonsense reasoning as it allows the application of existing knowledge to unfamiliar scenarios.

Adversarially Trained Actor Critic for offline CMDPs

no code implementations1 Jan 2024 Honghao Wei, Xiyue Peng, Xin Liu, Arnob Ghosh

Theoretically, we demonstrate that when the actor employs a no-regret optimization oracle, SATAC achieves two guarantees: (i) For the first time in the offline RL setting, we establish that SATAC can produce a policy that outperforms the behavior policy while maintaining the same level of safety, which is critical to designing an algorithm for offline RL.

Continuous Control Offline RL +1

Advancing Abductive Reasoning in Knowledge Graphs through Complex Logical Hypothesis Generation

no code implementations25 Dec 2023 Jiaxin Bai, Yicheng Wang, Tianshi Zheng, Yue Guo, Xin Liu, Yangqiu Song

Although many applications require the use of knowledge for explanations, the utilization of abductive reasoning in conjunction with structured knowledge, such as a knowledge graph, remains largely unexplored.

Knowledge Graphs Logical Reasoning

Enhancing User Intent Capture in Session-Based Recommendation with Attribute Patterns

1 code implementation NeurIPS 2023 Xin Liu, Zheng Li, Yifan Gao, Jingfeng Yang, Tianyu Cao, Zhengyang Wang, Bing Yin, Yangqiu Song

The goal of session-based recommendation in E-commerce is to predict the next item that an anonymous user will purchase based on the browsing and purchase history.

Attribute Session-Based Recommendations

Safe Reinforcement Learning with Instantaneous Constraints: The Role of Aggressive Exploration

no code implementations22 Dec 2023 Honghao Wei, Xin Liu, Lei Ying

This paper studies safe Reinforcement Learning (safe RL) with linear function approximation and under hard instantaneous constraints where unsafe actions must be avoided at each step.

4k reinforcement-learning +1

AutoAugment Input Transformation for Highly Transferable Targeted Attacks

no code implementations21 Dec 2023 Haobo Lu, Xin Liu, Kun He

However, few of them are dedicated to input transformation. In this work, we observe a positive correlation between the logit/probability of the target class and diverse input transformation methods in targeted attacks.

Adversarial Attack

MM-SafetyBench: A Benchmark for Safety Evaluation of Multimodal Large Language Models

1 code implementation29 Nov 2023 Xin Liu, Yichen Zhu, Jindong Gu, Yunshi Lan, Chao Yang, Yu Qiao

The security concerns surrounding Large Language Models (LLMs) have been extensively explored, yet the safety of Multimodal Large Language Models (MLLMs) remains understudied.

From Classification to Clinical Insights: Towards Analyzing and Reasoning About Mobile and Behavioral Health Data With Large Language Models

no code implementations21 Nov 2023 Zachary Englhardt, Chengqian Ma, Margaret E. Morris, Xuhai "Orson" Xu, Chun-Cheng Chang, Lianhui Qin, Daniel McDuff, Xin Liu, Shwetak Patel, Vikram Iyer

Passively collected behavioral health data from ubiquitous sensors holds significant promise to provide mental health professionals insights from patient's daily lives; however, developing analysis tools to use this data in clinical practice requires addressing challenges of generalization across devices and weak or ambiguous correlations between the measured signals and an individual's mental health.

Decision Making

ALPHA: AnomaLous Physiological Health Assessment Using Large Language Models

1 code implementation21 Nov 2023 Jiankai Tang, Kegang Wang, Hongming Hu, Xiyuxing Zhang, Peiyu Wang, Xin Liu, Yuntao Wang

Our findings reveal that LLMs exhibit exceptional performance in determining medical indicators, including a Mean Absolute Error (MAE) of less than 1 beat per minute for heart rate and less than 1% for oxygen saturation (SpO2).

Heart rate estimation Specificity

4K-Resolution Photo Exposure Correction at 125 FPS with ~8K Parameters

1 code implementation15 Nov 2023 Yijie Zhou, Chao Li, Jin Liang, Tianyi Xu, Xin Liu, Jun Xu

The illumination of improperly exposed photographs has been widely corrected using deep convolutional neural networks or Transformers.

4k 8k

AbsPyramid: Benchmarking the Abstraction Ability of Language Models with a Unified Entailment Graph

1 code implementation15 Nov 2023 Zhaowei Wang, Haochen Shi, Weiqi Wang, Tianqing Fang, Hongming Zhang, Sehyun Choi, Xin Liu, Yangqiu Song

Cognitive research indicates that abstraction ability is essential in human intelligence, which remains under-explored in language models.

Benchmarking

Training Robust Deep Physiological Measurement Models with Synthetic Video-based Data

no code implementations9 Nov 2023 Yuxuan Ou, Yuzhe Zhang, Yuntang Wang, Shwetak Patel, Daniel McDuf, Yuzhe Yang, Xin Liu

However, there exists a significant gap between synthetic and real-world data, which hinders the generalization of neural models trained on these synthetic datasets.

P-Bench: A Multi-level Privacy Evaluation Benchmark for Language Models

no code implementations7 Nov 2023 Haoran Li, Dadi Guo, Donghao Li, Wei Fan, Qi Hu, Xin Liu, Chunkit Chan, Duanyi Yao, Yangqiu Song

Lastly, P-Bench performs existing privacy attacks on LMs with pre-defined privacy objectives as the empirical evaluation results.

Privacy Preserving

IBADR: an Iterative Bias-Aware Dataset Refinement Framework for Debiasing NLU models

no code implementations1 Nov 2023 Xiaoyue Wang, Xin Liu, Lijie Wang, Yaoxiang Wang, Jinsong Su, Hua Wu

Then, we pair each sample with a bias indicator representing its bias degree, and use these extended samples to train a sample generator.

Natural Language Understanding

Recaptured Raw Screen Image and Video Demoiréing via Channel and Spatial Modulations

1 code implementation NeurIPS 2023 Huanjing Yue, Yijia Cheng, Xin Liu, Jingyu Yang

The spatial modulation utilizes the feature with large receptive field to modulate the feature with small receptive field.

LitCab: Lightweight Language Model Calibration over Short- and Long-form Responses

1 code implementation30 Oct 2023 Xin Liu, Muhammad Khalifa, Lu Wang

For evaluation, we construct CaT, a benchmark consisting of eight text generation tasks, covering responses ranging from short phrases to paragraphs.

Language Modelling Text Generation

Gold: A Global and Local-aware Denoising Framework for Commonsense Knowledge Graph Noise Detection

1 code implementation18 Oct 2023 Zheye Deng, Weiqi Wang, Zhaowei Wang, Xin Liu, Yangqiu Song

Commonsense Knowledge Graphs (CSKGs) are crucial for commonsense reasoning, yet constructing them through human annotations can be costly.

Denoising Knowledge Graphs +1

QADYNAMICS: Training Dynamics-Driven Synthetic QA Diagnostic for Zero-Shot Commonsense Question Answering

1 code implementation17 Oct 2023 Haochen Shi, Weiqi Wang, Tianqing Fang, Baixuan Xu, Wenxuan Ding, Xin Liu, Yangqiu Song

Zero-shot commonsense Question-Answering (QA) requires models to reason about general situations beyond specific benchmarks.

Question Answering

On the Convergence of Federated Averaging under Partial Participation for Over-parameterized Neural Networks

no code implementations9 Oct 2023 Xin Liu, Wei Li, Dazhi Zhan, Yu Pan, Xin Ma, Yu Ding, Zhisong Pan

Federated learning (FL) is a widely employed distributed paradigm for collaboratively training machine learning models from multiple clients without sharing local data.

Federated Learning

ComSD: Balancing Behavioral Quality and Diversity in Unsupervised Skill Discovery

1 code implementation29 Sep 2023 Xin Liu, Yaran Chen, Dongbin Zhao

Ideal unsupervised skill discovery methods are able to produce diverse and qualified skills in the absence of extrinsic reward, while the discovered skill set can efficiently adapt to downstream tasks in various ways.

Contrastive Learning

Self-Consistent Narrative Prompts on Abductive Natural Language Inference

1 code implementation15 Sep 2023 Chunkit Chan, Xin Liu, Tsz Ho Chan, Jiayang Cheng, Yangqiu Song, Ginny Wong, Simon See

However, the inter-sentential coherence and the model consistency have not been well exploited in the previous works on this task.

Language Modelling Natural Language Inference

Federated Linear Bandit Learning via Over-the-Air Computation

no code implementations25 Aug 2023 Jiali Wang, Yuning Jiang, Xin Liu, Ting Wang, Yuanming Shi

In this context, we propose a customized federated linear bandits scheme, where each device transmits an analog signal, and the server receives a superposition of these signals distorted by channel noise.

Video BagNet: short temporal receptive fields increase robustness in long-term action recognition

1 code implementation22 Aug 2023 Ombretta Strafforello, Xin Liu, Klamer Schutte, Jan van Gemert

Previous work on long-term video action recognition relies on deep 3D-convolutional models that have a large temporal receptive field (RF).

Action Recognition Temporal Action Localization

Federated Reinforcement Learning for Electric Vehicles Charging Control on Distribution Networks

no code implementations17 Aug 2023 Junkai Qian, Yuning Jiang, Xin Liu, Qing Wang, Ting Wang, Yuanming Shi, Wei Chen

To effectively learn the optimal EV charging control strategy, a federated deep reinforcement learning algorithm named FedSAC is further proposed.

reinforcement-learning

Edit Temporal-Consistent Videos with Image Diffusion Model

no code implementations17 Aug 2023 Yuanzhi Wang, Yong Li, Xiaoya Zhang, Xin Liu, Anbo Dai, Antoni B. Chan, Zhen Cui

In addition to the utilization of a pretrained T2I 2D Unet for spatial content manipulation, we establish a dedicated temporal Unet architecture to faithfully capture the temporal coherence of the input video sequences.

Video Temporal Consistency

Dual-Stream Diffusion Net for Text-to-Video Generation

no code implementations16 Aug 2023 Binhui Liu, Xin Liu, Anbo Dai, Zhiyong Zeng, Dan Wang, Zhen Cui, Jian Yang

In particular, the designed two diffusion streams, video content and motion branches, could not only run separately in their private spaces for producing personalized video variations as well as content, but also be well-aligned between the content and motion domains through leveraging our designed cross-transformer interaction module, which would benefit the smoothness of generated videos.

Text-to-Video Generation Video Generation

CasCIFF: A Cross-Domain Information Fusion Framework Tailored for Cascade Prediction in Social Networks

1 code implementation9 Aug 2023 Hongjun Zhu, Shun Yuan, Xin Liu, Kuo Chen, Chaolong Jia, Ying Qian

Existing approaches for information cascade prediction fall into three main categories: feature-driven methods, point process-based methods, and deep learning-based methods.

Multi-Task Learning

Exploring and Characterizing Large Language Models For Embedded System Development and Debugging

no code implementations7 Jul 2023 Zachary Englhardt, Richard Li, Dilini Nissanka, Zhihan Zhang, Girish Narayanswamy, Joseph Breda, Xin Liu, Shwetak Patel, Vikram Iyer

We leverage this finding to study how human programmers interact with these tools, and develop an human-AI based software engineering workflow for building embedded systems.

Class-Incremental Learning using Diffusion Model for Distillation and Replay

no code implementations30 Jun 2023 Quentin Jodelet, Xin Liu, Yin Jun Phua, Tsuyoshi Murata

Experiments on the competitive benchmarks CIFAR100, ImageNet-Subset, and ImageNet demonstrate how this new approach can be used to further improve the performance of state-of-the-art methods for class-incremental learning on large scale datasets.

Class Incremental Learning Incremental Learning

rPPG-MAE: Self-supervised Pre-training with Masked Autoencoders for Remote Physiological Measurement

1 code implementation4 Jun 2023 Xin Liu, Yuting Zhang, Zitong Yu, Hao Lu, Huanjing Yue, Jingyu Yang

However, they focus on the contrastive learning between samples, which neglect the inherent self-similar prior in physiological signals and seem to have a limited ability to cope with noisy.

Contrastive Learning

A Simple yet Effective Self-Debiasing Framework for Transformer Models

1 code implementation2 Jun 2023 Xiaoyue Wang, Lijie Wang, Xin Liu, Suhang Wu, Jinsong Su, Hua Wu

In this way, the top-layer sentence representation will be trained to ignore the common biased features encoded by the low-layer sentence representation and focus on task-relevant unbiased features.

Natural Language Understanding Sentence

Optimizing Airbnb Search Journey with Multi-task Learning

no code implementations28 May 2023 Chun How Tan, Austin Chan, Malay Haldar, Jie Tang, Xin Liu, Mustafa Abdool, Huiji Gao, Liwei He, Sanjeev Katariya

The long and exploratory nature of the search journey, as well as the need to balance both guest and host preferences, present unique challenges for Airbnb search ranking.

Multi-Task Learning

CAR: Conceptualization-Augmented Reasoner for Zero-Shot Commonsense Question Answering

1 code implementation24 May 2023 Weiqi Wang, Tianqing Fang, Wenxuan Ding, Baixuan Xu, Xin Liu, Yangqiu Song, Antoine Bosselut

The task of zero-shot commonsense question answering evaluates models on their capacity to reason about general scenarios beyond those presented in specific datasets.

Question Answering

BOLT: Fast Energy-based Controlled Text Generation with Tunable Biases

2 code implementations19 May 2023 Xin Liu, Muhammad Khalifa, Lu Wang

Energy-based models (EBMs) have gained popularity for controlled text generation due to their high applicability to a wide range of constraints.

Text Generation

DiscoPrompt: Path Prediction Prompt Tuning for Implicit Discourse Relation Recognition

1 code implementation6 May 2023 Chunkit Chan, Xin Liu, Jiayang Cheng, Zihan Li, Yangqiu Song, Ginny Y. Wong, Simon See

Implicit Discourse Relation Recognition (IDRR) is a sophisticated and challenging task to recognize the discourse relations between the arguments with the absence of discourse connectives.

Relation text-classification +1

Adam-family Methods for Nonsmooth Optimization with Convergence Guarantees

no code implementations6 May 2023 Nachuan Xiao, Xiaoyin Hu, Xin Liu, Kim-Chuan Toh

In this paper, we present a comprehensive study on the convergence properties of Adam-family methods for nonsmooth optimization, especially in the training of nonsmooth neural networks.

Walk4Me: Telehealth Community Mobility Assessment, An Automated System for Early Diagnosis and Disease Progression

no code implementations5 May 2023 Albara Ah Ramli, Xin Liu, Erik K. Henricson

Our system achieves this by 1) enabling early diagnosis, 2) identifying early indicators of clinical severity, and 3) quantifying and tracking the progression of the disease across the ambulatory phase of the disease.

Decision Making

ChatGPT Evaluation on Sentence Level Relations: A Focus on Temporal, Causal, and Discourse Relations

no code implementations28 Apr 2023 Chunkit Chan, Jiayang Cheng, Weiqi Wang, Yuxin Jiang, Tianqing Fang, Xin Liu, Yangqiu Song

This paper aims to quantitatively evaluate the performance of ChatGPT, an interactive large language model, on inter-sentential relations such as temporal relations, causal relations, and discourse relations.

Discourse Parsing In-Context Learning +6

Recognizable Information Bottleneck

1 code implementation28 Apr 2023 Yilin Lyu, Xin Liu, Mingyang Song, Xinyue Wang, Yaxin Peng, Tieyong Zeng, Liping Jing

The recent PAC-Bayes IB uses information complexity instead of information compression to establish a connection with the mutual information generalization bound.

PIAT: Parameter Interpolation based Adversarial Training for Image Classification

no code implementations24 Mar 2023 Kun He, Xin Liu, Yichen Yang, Zhou Qin, Weigao Wen, Hui Xue, John E. Hopcroft

Besides, we suggest to use the Normalized Mean Square Error (NMSE) to further improve the robustness by aligning the clean and adversarial examples.

Classification Image Classification

BigSmall: Efficient Multi-Task Learning for Disparate Spatial and Temporal Physiological Measurements

2 code implementations21 Mar 2023 Girish Narayanswamy, Yujia Liu, Yuzhe Yang, Chengqian Ma, Xin Liu, Daniel McDuff, Shwetak Patel

As an example, perception occurs at different scales both spatially and temporally, suggesting that the extraction of salient visual information may be made more effective by paying attention to specific features at varying scales.

Multi-Task Learning

Motion Matters: Neural Motion Transfer for Better Camera Physiological Measurement

1 code implementation21 Mar 2023 Akshay Paruchuri, Xin Liu, Yulu Pan, Shwetak Patel, Daniel McDuff, Soumyadip Sengupta

Our findings illustrate the usefulness of motion transfer as a data augmentation technique for improving the generalization of models for camera-based physiological sensing.

Data Augmentation Photoplethysmography (PPG)

Facial Affect Recognition based on Transformer Encoder and Audiovisual Fusion for the ABAW5 Challenge

no code implementations16 Mar 2023 Ziyang Zhang, Liuwei An, Zishun Cui, Ao Xu, Tengteng Dong, Yueqi Jiang, Jingyi Shi, Xin Liu, Xiao Sun, Meng Wang

In this paper, we present our solutions for the 5th Workshop and Competition on Affective Behavior Analysis in-the-wild (ABAW), which includes four sub-challenges of Valence-Arousal (VA) Estimation, Expression (Expr) Classification, Action Unit (AU) Detection and Emotional Reaction Intensity (ERI) Estimation.

Unsupervised HDR Image and Video Tone Mapping via Contrastive Learning

1 code implementation13 Mar 2023 Cong Cao, Huanjing Yue, Xin Liu, Jingyu Yang

We construct a large-scale unpaired HDR-LDR video dataset to facilitate the unsupervised training process for video tone mapping.

Contrastive Learning Tone Mapping

X-ray Spectral Estimation using Dictionary Learning

no code implementations27 Feb 2023 Wenrui Li, Venkatesh Sridhar, K. Aditya Mohan, Saransh Singh, Jean-Baptiste Forien, Xin Liu, Gregery T. Buzzard, Charles A. Bouman

As computational tools for X-ray computed tomography (CT) become more quantitatively accurate, knowledge of the source-detector spectral response is critical for quantitative system-independent reconstruction and material characterization capabilities.

Computed Tomography (CT) Dictionary Learning

Rethinking Vision Transformer and Masked Autoencoder in Multimodal Face Anti-Spoofing

no code implementations11 Feb 2023 Zitong Yu, Rizhao Cai, Yawen Cui, Xin Liu, Yongjian Hu, Alex Kot

In this paper, we investigate three key factors (i. e., inputs, pre-training, and finetuning) in ViT for multimodal FAS with RGB, Infrared (IR), and Depth.

Face Anti-Spoofing

Cross-domain Random Pre-training with Prototypes for Reinforcement Learning

no code implementations11 Feb 2023 Xin Liu, Yaran Chen, Haoran Li, Boyu Li, Dongbin Zhao

CRPTpro significantly outperforms the next best Proto-RL(C) on 11/12 cross-domain downstream tasks with only 54\% wall-clock pre-training time, exhibiting state-of-the-art pre-training performance with greatly improved pre-training efficiency.

reinforcement-learning Reinforcement Learning (RL) +1

MMPD: Multi-Domain Mobile Video Physiology Dataset

2 code implementations8 Feb 2023 Jiankai Tang, Kequan Chen, Yuntao Wang, Yuanchun Shi, Shwetak Patel, Daniel McDuff, Xin Liu

Second, most datasets are relatively small and therefore are limited in diversity, both in appearance (e. g., skin tone), behaviors (e. g., motion) and environment (e. g., lighting conditions).

Descriptive

Online Nonstochastic Control with Adversarial and Static Constraints

no code implementations5 Feb 2023 Xin Liu, Zixian Yang, Lei Ying

This subroutine also achieves the state-of-the-art regret and constraint violation bounds for constrained online convex optimization problems, which is of independent interest.

C2ST: Cross-Modal Contextualized Sequence Transduction for Continuous Sign Language Recognition

no code implementations ICCV 2023 Huaiwen Zhang, Zihang Guo, Yang Yang, Xin Liu, De Hu

In this paper, we propose a Cross-modal Contextualized Sequence Transduction (C2ST) for CSLR, which effectively incorporates the knowledge of gloss sequence into the process of video representation learning and sequence transduction.

Language Modelling Representation Learning +1

Progressive Neighbor Consistency Mining for Correspondence Pruning

1 code implementation CVPR 2023 Xin Liu, Jufeng Yang

In the end, we develop a Neighbor Consistency Mining Network (NCMNet) for accurately recovering camera poses and identifying inliers.

Scalable and Sample Efficient Distributed Policy Gradient Algorithms in Multi-Agent Networked Systems

no code implementations13 Dec 2022 Xin Liu, Honghao Wei, Lei Ying

The proposed algorithm is distributed in two aspects: (i) the learned policy is a distributed policy that maps a local state of an agent to its local action and (ii) the learning/training is distributed, during which each agent updates its policy based on its own and neighbors' information.

Multi-agent Reinforcement Learning reinforcement-learning +1

On the Discredibility of Membership Inference Attacks

no code implementations6 Dec 2022 Shahbaz Rezaei, Xin Liu

We argue that current membership inference attacks can identify memorized subpopulations, but they cannot reliably identify which exact sample in the subpopulation was used during the training.

Efficient stereo matching on embedded GPUs with zero-means cross correlation

no code implementations1 Dec 2022 Qiong Chang, Aolong Zha, Weimin WANG, Xin Liu, Masaki Onishi, Lei Lei, Meng Joo Er, Tsutomu Maruyama

By combining this technique with the domain transformation (DT) algorithm, our system show real-time processing speed of 32 fps, on a Jetson Tx2 GPU for 1, 280x384 pixel images with a maximum disparity of 128.

Stereo Matching

Rectified Pessimistic-Optimistic Learning for Stochastic Continuum-armed Bandit with Constraints

no code implementations27 Nov 2022 Hengquan Guo, Qi Zhu, Xin Liu

This paper studies the problem of stochastic continuum-armed bandit with constraints (SCBwC), where we optimize a black-box reward function $f(x)$ subject to a black-box constraint function $g(x)\leq 0$ over a continuous space $\mathcal X$.

Gaussian Processes

Federated Learning Hyper-Parameter Tuning from a System Perspective

1 code implementation24 Nov 2022 Huanle Zhang, Lei Fu, Mi Zhang, Pengfei Hu, Xiuzhen Cheng, Prasant Mohapatra, Xin Liu

In this paper, we propose FedTune, an automatic FL hyper-parameter tuning algorithm tailored to applications' diverse system requirements in FL training.

Federated Learning

Quantifying the Impact of Label Noise on Federated Learning

no code implementations15 Nov 2022 Shuqi Ke, Chao Huang, Xin Liu

Federated Learning (FL) is a distributed machine learning paradigm where clients collaboratively train a model using their local (human-generated) datasets.

Federated Learning

Getting the Most out of Simile Recognition

no code implementations11 Nov 2022 Xiaoyue Wang, Linfeng Song, Xin Liu, Chulun Zhou, Jinsong Su

Simile recognition involves two subtasks: simile sentence classification that discriminates whether a sentence contains simile, and simile component extraction that locates the corresponding objects (i. e., tenors and vehicles).

POS Sentence +1

Complex Hyperbolic Knowledge Graph Embeddings with Fast Fourier Transform

1 code implementation7 Nov 2022 Huiru Xiao, Xin Liu, Yangqiu Song, Ginny Y. Wong, Simon See

However, the performance of the hyperbolic KG embedding models for non-transitive relations is still unpromising, while the complex hyperbolic embeddings do not deal with multi-relations.

Knowledge Graph Embeddings

Client Selection in Federated Learning: Principles, Challenges, and Opportunities

no code implementations3 Nov 2022 Lei Fu, Huanle Zhang, Ge Gao, Mi Zhang, Xin Liu

As a privacy-preserving paradigm for training Machine Learning (ML) models, Federated Learning (FL) has received tremendous attention from both industry and academia.

Fairness Federated Learning +1

Opportunistic Episodic Reinforcement Learning

no code implementations24 Oct 2022 Xiaoxiao Wang, Nader Bouacida, Xueying Guo, Xin Liu

In this paper, we propose and study opportunistic reinforcement learning - a new variant of reinforcement learning problems where the regret of selecting a suboptimal action varies under an external environmental condition known as the variation factor.

reinforcement-learning Reinforcement Learning (RL)

Self-Supervised Learning via Maximum Entropy Coding

1 code implementation20 Oct 2022 Xin Liu, Zhongdao Wang, YaLi Li, Shengjin Wang

To cope with this issue, we propose Maximum Entropy Coding (MEC), a more principled objective that explicitly optimizes on the structure of the representation, so that the learned representation is less biased and thus generalizes better to unseen downstream tasks.

Instance Segmentation object-detection +4

GraphCSPN: Geometry-Aware Depth Completion via Dynamic GCNs

1 code implementation19 Oct 2022 Xin Liu, Xiaofei Shao, Bo wang, YaLi Li, Shengjin Wang

First, unlike previous methods, we leverage convolution neural networks as well as graph neural networks in a complementary way for geometric representation learning.

Autonomous Driving Depth Completion +1

Not All Neighbors are Friendly: Learning to Choose Hop Features to Improve Node Classification

1 code implementation CIKM 2022 Sunil Kumar Maurya, Xin Liu, Tsuyoshi Murata

With extensive experiments, we show that our proposed model outperforms the state-of-the-art GNN models with remarkable improvements up to 27. 8%.

Node Classification

MMTSA: Multimodal Temporal Segment Attention Network for Efficient Human Activity Recognition

no code implementations14 Oct 2022 Ziqi Gao, Yuntao Wang, Jianguo Chen, Junliang Xing, Shwetak Patel, Xin Liu, Yuanchun Shi

The efficiency evaluation on an edge device showed that MMTSA achieved significantly better accuracy, lower computational load, and lower inference latency than SOTA methods.

Human Activity Recognition

SimPer: Simple Self-Supervised Learning of Periodic Targets

1 code implementation6 Oct 2022 Yuzhe Yang, Xin Liu, Jiang Wu, Silviu Borac, Dina Katabi, Ming-Zher Poh, Daniel McDuff

From human physiology to environmental evolution, important processes in nature often exhibit meaningful and strong periodic or quasi-periodic changes.

Inductive Bias Self-Supervised Learning

Spatio-Temporal Contrastive Learning Enhanced GNNs for Session-based Recommendation

1 code implementation23 Sep 2022 Zhongwei Wan, Xin Liu, Benyou Wang, Jiezhong Qiu, Boyu Li, Ting Guo, Guangyong Chen, Yang Wang

The idea is to supplement the GNN-based main supervised recommendation task with the temporal representation via an auxiliary cross-view contrastive learning mechanism.

Collaborative Filtering Contrastive Learning +1

Rethinking Efficiency and Redundancy in Training Large-scale Graphs

no code implementations2 Sep 2022 Xin Liu, Xunbin Xiong, Mingyu Yan, Runzhen Xue, Shirui Pan, Xiaochun Ye, Dongrui Fan

Thereby, we propose to drop redundancy and improve efficiency of training large-scale graphs with GNNs, by rethinking the inherent characteristics in a graph.

A high-resolution dynamical view on momentum methods for over-parameterized neural networks

no code implementations8 Aug 2022 Xin Liu, Wei Tao, Jun Wang, Zhisong Pan

Due to the simplicity and efficiency of the first-order gradient method, it has been widely used in training neural networks.

BrainCog: A Spiking Neural Network based Brain-inspired Cognitive Intelligence Engine for Brain-inspired AI and Brain Simulation

no code implementations18 Jul 2022 Yi Zeng, Dongcheng Zhao, Feifei Zhao, Guobin Shen, Yiting Dong, Enmeng Lu, Qian Zhang, Yinqian Sun, Qian Liang, Yuxuan Zhao, Zhuoya Zhao, Hongjian Fang, Yuwei Wang, Yang Li, Xin Liu, Chengcheng Du, Qingqun Kong, Zizhe Ruan, Weida Bi

These brain-inspired AI models have been effectively validated on various supervised, unsupervised, and reinforcement learning tasks, and they can be used to enable AI models to be with multiple brain-inspired cognitive functions.

Decision Making

Brain-inspired Graph Spiking Neural Networks for Commonsense Knowledge Representation and Reasoning

no code implementations11 Jul 2022 Hongjian Fang, Yi Zeng, Jianbo Tang, Yuwei Wang, Yao Liang, Xin Liu

For the fields of neuroscience and cognitive science, the work in this paper provided the foundation of computational modeling for further exploration of the way the human brain represents commonsense knowledge.

Enhancing Local Geometry Learning for 3D Point Cloud via Decoupling Convolution

no code implementations4 Jul 2022 Haoyi Xiu, Xin Liu, Weimin WANG, Kyoung-Sook Kim, Takayuki Shinohara, Qiong Chang, Masashi Matsuoka

Modeling the local surface geometry is challenging in 3D point cloud understanding due to the lack of connectivity information.

Cross-Silo Federated Learning: Challenges and Opportunities

no code implementations26 Jun 2022 Chao Huang, Jianwei Huang, Xin Liu

Federated learning (FL) is an emerging technology that enables the training of machine learning models from multiple clients while keeping the data distributed and private.

Federated Learning

FedSSO: A Federated Server-Side Second-Order Optimization Algorithm

no code implementations20 Jun 2022 Xin Ma, Renyi Bao, Jinpeng Jiang, Yang Liu, Arthur Jiang, Jun Yan, Xin Liu, Zhisong Pan

In this work, we propose FedSSO, a server-side second-order optimization method for federated learning (FL).

Federated Learning

Boosting Graph Structure Learning with Dummy Nodes

1 code implementation17 Jun 2022 Xin Liu, Jiayang Cheng, Yangqiu Song, Xin Jiang

We extend graph kernels and graph neural networks with dummy nodes and conduct experiments on graph classification and subgraph isomorphism matching tasks.

Graph Classification Graph Representation Learning +1

A Multi-task Framework for Infrared Small Target Detection and Segmentation

1 code implementation14 Jun 2022 Yuhang Chen, Liyuan Li, Xin Liu, Xiaofeng Su, Fansheng Chen

First, with the use of UNet as the backbone to maintain resolution and semantic information, our model can achieve a higher detection accuracy than other state-of-the-art methods by attaching a simple anchor-free head.

Multi-Task Learning object-detection +3

SCAMPS: Synthetics for Camera Measurement of Physiological Signals

2 code implementations8 Jun 2022 Daniel McDuff, Miah Wander, Xin Liu, Brian L. Hill, Javier Hernandez, Jonathan Lester, Tadas Baltrusaitis

The use of cameras and computational algorithms for noninvasive, low-cost and scalable measurement of physiological (e. g., cardiac and pulmonary) vital signs is very attractive.

Descriptive Heart Rate Variability

Exploration, Exploitation, and Engagement in Multi-Armed Bandits with Abandonment

no code implementations26 May 2022 Zixian Yang, Xin Liu, Lei Ying

To understand the exploration, exploitation, and engagement in these systems, we propose a new model, called MAB-A where "A" stands for abandonment and the abandonment probability depends on the current recommended item and the user's past experience (called state).

Multi-Armed Bandits Q-Learning +1

Selective clustering ensemble based on kappa and F-score

no code implementations23 Apr 2022 Jie Yan, Xin Liu, Ji Qi, Tao You, Zhong-Yuan Zhang

Clustering ensemble has an impressive performance in improving the accuracy and robustness of partition results and has received much attention in recent years.

Clustering Clustering Ensemble

A Convergence Analysis of Nesterov's Accelerated Gradient Method in Training Deep Linear Neural Networks

no code implementations18 Apr 2022 Xin Liu, Wei Tao, Zhisong Pan

To the best of our knowledge, this is the first theoretical guarantee for the convergence of NAG to the global minimum in training deep neural networks.

Ethereum Fraud Detection with Heterogeneous Graph Neural Networks

no code implementations23 Mar 2022 Hiroki Kanezashi, Toyotaro Suzumura, Xin Liu, Takahiro Hirofuchi

Specifically, we evaluated the model performance of representative homogeneous GNN models which consider single-type nodes and edges and heterogeneous GNN models which support different types of nodes and edges.

Fraud Detection

Federated Remote Physiological Measurement with Imperfect Data

no code implementations11 Mar 2022 Xin Liu, Mingchuan Zhang, Ziheng Jiang, Shwetak Patel, Daniel McDuff

The growing need for technology that supports remote healthcare is being acutely highlighted by an aging population and the COVID-19 pandemic.

Federated Learning Privacy Preserving

User-Level Membership Inference Attack against Metric Embedding Learning

no code implementations4 Mar 2022 Guoyao Li, Shahbaz Rezaei, Xin Liu

In this paper, we develop a user-level MI attack where the goal is to find if any sample from the target user has been used during training even when no exact training sample is available to the attacker.

Inference Attack Membership Inference Attack +1

An Efficient Subpopulation-based Membership Inference Attack

no code implementations4 Mar 2022 Shahbaz Rezaei, Xin Liu

The intuition is that the model response should not be significantly different between the target sample and its subpopulation if it was not a training sample.

Inference Attack Membership Inference Attack

Enhancing Local Feature Learning for 3D Point Cloud Processing using Unary-Pairwise Attention

no code implementations1 Mar 2022 Haoyi Xiu, Xin Liu, Weimin WANG, Kyoung-Sook Kim, Takayuki Shinohara, Qiong Chang, Masashi Matsuoka

We present a simple but effective attention named the unary-pairwise attention (UPA) for modeling the relationship between 3D point clouds.

Scene Segmentation

Survey on Graph Neural Network Acceleration: An Algorithmic Perspective

no code implementations10 Feb 2022 Xin Liu, Mingyu Yan, Lei Deng, Guoqi Li, Xiaochun Ye, Dongrui Fan, Shirui Pan, Yuan Xie

Next, we provide comparisons from aspects of the efficiency and characteristics of these methods.

MobilePhys: Personalized Mobile Camera-Based Contactless Physiological Sensing

no code implementations11 Jan 2022 Xin Liu, Yuntao Wang, Sinan Xie, XiaoYu Zhang, Zixian Ma, Daniel McDuff, Shwetak Patel

Camera-based contactless photoplethysmography refers to a set of popular techniques for contactless physiological measurement.

Decentralized Optimization Over the Stiefel Manifold by an Approximate Augmented Lagrangian Function

no code implementations30 Dec 2021 Lei Wang, Xin Liu

In this paper, we focus on the decentralized optimization problem over the Stiefel manifold, which is defined on a connected network of $d$ agents.

Diaformer: Automatic Diagnosis via Symptoms Sequence Generation

1 code implementation20 Dec 2021 Junying Chen, Dongfang Li, Qingcai Chen, Wenxiu Zhou, Xin Liu

Detailed analysis on symptom inquiry prediction demonstrates that the potential of applying symptoms sequence generation for automatic diagnosis.

Graph Convolutional Networks with Dual Message Passing for Subgraph Isomorphism Counting and Matching

1 code implementation16 Dec 2021 Xin Liu, Yangqiu Song

Based on this observation, we propose dual message passing neural networks (DMPNNs) to enhance the substructure representation learning in an asynchronous way for subgraph isomorphism counting and matching as well as unsupervised node classification.

Node Classification Representation Learning

KGR^4: Retrieval, Retrospect, Refine and Rethink for Commonsense Generation

1 code implementation15 Dec 2021 Xin Liu, Dayiheng Liu, Baosong Yang, Haibo Zhang, Junwei Ding, Wenqing Yao, Weihua Luo, Haiying Zhang, Jinsong Su

Generative commonsense reasoning requires machines to generate sentences describing an everyday scenario given several concepts, which has attracted much attention recently.

Retrieval Sentence

Leaping Through Time with Gradient-based Adaptation for Recommendation

1 code implementation11 Dec 2021 Nuttapong Chairatanakul, Hoang NT, Xin Liu, Tsuyoshi Murata

Different from the popular recurrent modeling approach, we propose a new solution named LeapRec to the temporal dynamic problem by using trajectory-based meta-learning to model time dependencies.

Meta-Learning Recommendation Systems

CLARA: A Constrained Reinforcement Learning Based Resource Allocation Framework for Network Slicing

no code implementations16 Nov 2021 Yongshuai Liu, Jiaxin Ding, Zhi-Li Zhang, Xin Liu

Network slicing is proposed as a promising solution for resource utilization in 5G and future networks to address this dire need.

Management reinforcement-learning +1

Simplifying approach to Node Classification in Graph Neural Networks

1 code implementation12 Nov 2021 Sunil Kumar Maurya, Xin Liu, Tsuyoshi Murata

In this work, we decouple the node feature aggregation step and depth of graph neural network, and empirically analyze how different aggregated features play a role in prediction performance.

Classification feature selection +1

RGB Camera-based Physiological Sensing: Challenges and Future Directions

no code implementations26 Oct 2021 Xin Liu, Shwetak Patel, Daniel McDuff

Numerous real-world applications have been driven by the recent algorithmic advancement of artificial intelligence (AI).

Natural Image Reconstruction from fMRI using Deep Learning: A Survey

no code implementations journal 2021 Zarina Rakhimberdina, Quentin Jodelet, Xin Liu, Tsuyoshi Murata

With the advent of brain imaging techniques and machine learning tools, much effort has been devoted to building computational models to capture the encoding of visual information in the human brain.

Brain Decoding Image Reconstruction

Synthetic Data for Multi-Parameter Camera-Based Physiological Sensing

no code implementations10 Oct 2021 Daniel McDuff, Xin Liu, Javier Hernandez, Erroll Wood, Tadas Baltrusaitis

We present systematic experiments showing how physiologically-grounded synthetic data can be used in training camera-based multi-parameter cardiopulmonary sensing.

Learning Higher-Order Dynamics in Video-Based Cardiac Measurement

no code implementations7 Oct 2021 Brian L. Hill, Xin Liu, Daniel McDuff

Recent developments in camera-based vital sign measurement have shown that cardiac measurements can be recovered with impressive accuracy from videos; however, most of the research has focused on extracting summary statistics such as heart rate.

Optical Flow Estimation

FedTune: Automatic Tuning of Federated Learning Hyper-Parameters from System Perspective

1 code implementation6 Oct 2021 Huanle Zhang, Mi Zhang, Xin Liu, Prasant Mohapatra, Michael DeLucia

Federated learning (FL) hyper-parameters significantly affect the training overheads in terms of computation time, transmission time, computation load, and transmission load.

Federated Learning

Spatio-Temporal-Categorical Graph Neural Networks for Fine-Grained Multi-Incident Co-Prediction

1 code implementation CIKM '21: Proceedings of the 30th ACM International Conference on Information & Knowledge Management 2021 Zhaonan Wang, Renhe Jiang, Zekun Cai, Zipei Fan, Xin Liu, Kyoung-Sook Kim, Xuan Song, Ryosuke Shibasaki

Forecasting incident occurrences (e. g. crime, EMS, traffic accident) is a crucial task for emergency service providers and transportation agencies in performing response time optimization and dynamic fleet management.

Decision Making Management

EfficientPhys: Enabling Simple, Fast, and Accurate Camera-Based Vitals Measurement

no code implementations29 Sep 2021 Xin Liu, Brian L. Hill, Ziheng Jiang, Shwetak Patel, Daniel McDuff

Camera-based physiological measurement is a growing field with neural models providing state-the-art-performance.

Face Detection

Automatic Tuning of Federated Learning Hyper-Parameters from System Perspective

no code implementations29 Sep 2021 Huanle Zhang, Mi Zhang, Xin Liu, Prasant Mohapatra, Michael DeLucia

Federated Learning (FL) is a distributed model training paradigm that preserves clients' data privacy.

Federated Learning

Cross-lingual Transfer for Text Classification with Dictionary-based Heterogeneous Graph

1 code implementation Findings (EMNLP) 2021 Nuttapong Chairatanakul, Noppayut Sriwatanasakdi, Nontawat Charoenphakdee, Xin Liu, Tsuyoshi Murata

To address this challenge, we propose dictionary-based heterogeneous graph neural network (DHGNet) that effectively handles the heterogeneity of DHG by two-step aggregations, which are word-level and language-level aggregations.

Cross-Lingual Transfer text-classification +2

GNNSampler: Bridging the Gap between Sampling Algorithms of GNN and Hardware

1 code implementation26 Aug 2021 Xin Liu, Mingyu Yan, Shuhan Song, Zhengyang Lv, WenMing Li, Guangyu Sun, Xiaochun Ye, Dongrui Fan

Extensive experiments show that our method is universal to mainstream sampling algorithms and helps significantly reduce the training time, especially in large-scale graphs.

AGNet: Weighing Black Holes with Deep Learning

1 code implementation17 Aug 2021 Joshua Yao-Yu Lin, Sneh Pandya, Devanshi Pratap, Xin Liu, Matias Carrasco Kind, Volodymyr Kindratenko

We find a 1$\sigma$ scatter of 0. 37 dex between the predicted SMBH mass and the fiducial virial mass estimate based on SDSS single-epoch spectra, which is comparable to the systematic uncertainty in the virial mass estimate.

Time Series Time Series Analysis

MMChat: Multi-Modal Chat Dataset on Social Media

1 code implementation LREC 2022 Yinhe Zheng, Guanyi Chen, Xin Liu, Jian Sun

To better investigate this issue, we manually annotate 100K dialogues from MMChat and further filter the corpus accordingly, which yields MMChat-hf.

Dialogue Generation

Provable Convergence of Nesterov's Accelerated Gradient Method for Over-Parameterized Neural Networks

no code implementations5 Jul 2021 Xin Liu, Zhisong Pan, Wei Tao

Despite the fact that the objective function is non-convex and non-smooth, we show that NAG converges to a global minimum at a non-asymptotic linear rate $(1-\Theta(1/\sqrt{\kappa}))^t$, where $\kappa > 1$ is the condition number of a gram matrix and $t$ is the number of the iterations.

iMiGUE: An Identity-free Video Dataset for Micro-Gesture Understanding and Emotion Analysis

1 code implementation CVPR 2021 Xin Liu, Henglin Shi, Haoyu Chen, Zitong Yu, Xiaobai Li, Guoying Zhaoz?

We introduce a new dataset for the emotional artificial intelligence research: identity-free video dataset for Micro-Gesture Understanding and Emotion analysis (iMiGUE).

Emotion Recognition

Early Mobility Recognition for Intensive Care Unit Patients Using Accelerometers

no code implementations28 Jun 2021 Rex Liu, Sarina A Fazio, Huanle Zhang, Albara Ah Ramli, Xin Liu, Jason Yeates Adams

In this paper, we target a new healthcare application of human activity recognition, early mobility recognition for Intensive Care Unit(ICU) patients.

Feature Engineering Human Activity Recognition

Multi-hop Graph Convolutional Network with High-order Chebyshev Approximation for Text Reasoning

1 code implementation ACL 2021 Shuoran Jiang, Qingcai Chen, Xin Liu, Baotian Hu, Lisai Zhang

In this study, we define the spectral graph convolutional network with the high-order dynamic Chebyshev approximation (HDGCN), which augments the multi-hop graph reasoning by fusing messages aggregated from direct and long-term dependencies into one convolutional layer.

A Provably-Efficient Model-Free Algorithm for Constrained Markov Decision Processes

no code implementations3 Jun 2021 Honghao Wei, Xin Liu, Lei Ying

This paper presents the first model-free, simulator-free reinforcement learning algorithm for Constrained Markov Decision Processes (CMDPs) with sublinear regret and zero constraint violation.

Improving Graph Neural Networks with Simple Architecture Design

1 code implementation17 May 2021 Sunil Kumar Maurya, Xin Liu, Tsuyoshi Murata

Combining these techniques, we present a simple and shallow model, Feature Selection Graph Neural Network (FSGNN), and show empirically that the proposed model outperforms other state of the art GNN models and achieves up to 64% improvements in accuracy on node classification tasks.

feature selection Node Classification

FDDH: Fast Discriminative Discrete Hashing for Large-Scale Cross-Modal Retrieval

1 code implementation15 May 2021 Xin Liu, Xingzhi Wang, Yiu-ming Cheung

To tackle these issues, we formulate the learning of similarity-preserving hash codes in terms of orthogonally rotating the semantic data so as to minimize the quantization loss of mapping such data to hamming space, and propose an efficient Fast Discriminative Discrete Hashing (FDDH) approach for large-scale cross-modal retrieval.

Cross-Modal Retrieval Quantization +1

Gait Characterization in Duchenne Muscular Dystrophy (DMD) Using a Single-Sensor Accelerometer: Classical Machine Learning and Deep Learning Approaches

no code implementations12 May 2021 Albara Ah Ramli, Xin Liu, Kelly Berndt, Erica Goude, Jiahui Hou, Lynea B. Kaethler, Rex Liu, Amanda Lopez, Alina Nicorici, Corey Owens, David Rodriguez, Jane Wang, Huanle Zhang, Daniel Aranki, Craig M. McDonald, Erik K. Henricson

We extracted temporospatial gait clinical features (CFs) and applied multiple machine learning (ML) approaches to differentiate between DMD and TD children using extracted temporospatial gait CFs and raw data.

Accuracy-Privacy Trade-off in Deep Ensemble: A Membership Inference Perspective

1 code implementation12 May 2021 Shahbaz Rezaei, Zubair Shafiq, Xin Liu

We analyze the impact of various factors in deep ensembles and demonstrate the root cause of the trade-off.

Ensemble Learning Inference Attack +1

Distractor-Aware Fast Tracking via Dynamic Convolutions and MOT Philosophy

1 code implementation CVPR 2021 Zikai Zhang, Bineng Zhong, Shengping Zhang, Zhenjun Tang, Xin Liu, Zhaoxiang Zhang

A practical long-term tracker typically contains three key properties, i. e. an efficient model design, an effective global re-detection strategy and a robust distractor awareness mechanism.

Multiple Object Tracking Philosophy

A Survey on Federated Learning and its Applications for Accelerating Industrial Internet of Things

no code implementations21 Apr 2021 Jiehan Zhou, Shouhua Zhang, Qinghua Lu, Wenbin Dai, Min Chen, Xin Liu, Susanna Pirttikangas, Yang Shi, Weishan Zhang, Enrique Herrera-Viedma

Federated learning (FL) brings collaborative intelligence into industries without centralized training data to accelerate the process of Industry 4. 0 on the edge computing level.

Edge-computing Federated Learning +1

ASER: Towards Large-scale Commonsense Knowledge Acquisition via Higher-order Selectional Preference over Eventualities

1 code implementation5 Apr 2021 Hongming Zhang, Xin Liu, Haojie Pan, Haowen Ke, Jiefu Ou, Tianqing Fang, Yangqiu Song

After conceptualization with Probase, a selectional preference based concept-instance relational knowledge base, our concept graph contains 15 million conceptualized eventualities and 224 million edges between them.

Discourse Parsing

Learning to Filter: Siamese Relation Network for Robust Tracking

1 code implementation CVPR 2021 Siyuan Cheng, Bineng Zhong, Guorong Li, Xin Liu, Zhenjun Tang, Xianxian Li, Jing Wang

RD performs in a meta-learning way to obtain a learning ability to filter the distractors from the background while RM aims to effectively integrate the proposed RD into the Siamese framework to generate accurate tracking result.

Meta-Learning Relation +1

An Overview of Human Activity Recognition Using Wearable Sensors: Healthcare and Artificial Intelligence

no code implementations29 Mar 2021 Rex Liu, Albara Ah Ramli, Huanle Zhang, Erik Henricson, Xin Liu

With the rapid development of the internet of things (IoT) and artificial intelligence (AI) technologies, human activity recognition (HAR) has been applied in a variety of domains such as security and surveillance, human-robot interaction, and entertainment.

Feature Engineering Human Activity Recognition +1

Balanced softmax cross-entropy for incremental learning with and without memory

no code implementations23 Mar 2021 Quentin Jodelet, Xin Liu, Tsuyoshi Murata

When incrementally trained on new classes, deep neural networks are subject to catastrophic forgetting which leads to an extreme deterioration of their performance on the old classes while learning the new ones.

Class Incremental Learning Incremental Learning +1

Sampling methods for efficient training of graph convolutional networks: A survey

no code implementations10 Mar 2021 Xin Liu, Mingyu Yan, Lei Deng, Guoqi Li, Xiaochun Ye, Dongrui Fan

Graph Convolutional Networks (GCNs) have received significant attention from various research fields due to the excellent performance in learning graph representations.

Higher-order topological superconductors based on weak topological insulators

no code implementations2 Mar 2021 Xun-Jiang Luo, Xiao-Hong Pan, Xin Liu

High-order topological phases host robust boundary states at the boundary of the boundary, which can be interpreted from their boundary topology.

Superconductivity Mesoscale and Nanoscale Physics Materials Science

DST: Data Selection and joint Training for Learning with Noisy Labels

no code implementations1 Mar 2021 Yi Wei, Xue Mei, Xin Liu, Pengxiang Xu

In this paper, we propose a Data Selection and joint Training (DST) method to automatically select training samples with accurate annotations.

Learning with noisy labels

An Efficient Pessimistic-Optimistic Algorithm for Stochastic Linear Bandits with General Constraints

no code implementations NeurIPS 2021 Xin Liu, Bin Li, Pengyi Shi, Lei Ying

Thus, the overall computational complexity of our algorithm is similar to that of the linear UCB for unconstrained stochastic linear bandits.

Learning adaptive differential evolution algorithm from optimization experiences by policy gradient

no code implementations6 Feb 2021 Jianyong Sun, Xin Liu, Thomas Bäck, Zongben Xu

A reinforcement learning algorithm, named policy gradient, is applied to learn an agent (i. e. parameter controller) that can provide the control parameters of a proposed differential evolution adaptively during the search procedure.

Evolutionary Algorithms

Spectrum Sharing for 6G Integrated Satellite-Terrestrial Communication Networks Based on NOMA and Cognitive Radio

no code implementations27 Jan 2021 Xin Liu, Kwok-Yan Lam, Feng Li, Jun Zhao, Li Wang

ISTCN aims to provide high speed and pervasive network services by integrating broadband terrestrial mobile networks with satellite communication networks.

Management

SplitSR: An End-to-End Approach to Super-Resolution on Mobile Devices

no code implementations20 Jan 2021 Xin Liu, Yuang Li, Josh Fromm, Yuntao Wang, Ziheng Jiang, Alex Mariakakis, Shwetak Patel

In this work, we demonstrate state-of-the-art latency and accuracy for on-device super-resolution using a novel hybrid architecture called SplitSR and a novel lightweight residual block called SplitSRBlock.

Super-Resolution

Generalized Image Reconstruction over T-Algebra

1 code implementation17 Jan 2021 Liang Liao, Xuechun Zhang, Xinqiang Wang, Sen Lin, Xin Liu

We also show in our experiments that the performance of TPCA increases when the order of compounded pixels increases.

Data Compression Dimensionality Reduction +1

Automated Model Design and Benchmarking of 3D Deep Learning Models for COVID-19 Detection with Chest CT Scans

2 code implementations14 Jan 2021 Xin He, Shihao Wang, Xiaowen Chu, Shaohuai Shi, Jiangping Tang, Xin Liu, Chenggang Yan, Jiyong Zhang, Guiguang Ding

The experimental results show that our automatically searched models (CovidNet3D) outperform the baseline human-designed models on the three datasets with tens of times smaller model size and higher accuracy.

Benchmarking Medical Diagnosis +1

An Unsupervised Learning Method with Convolutional Auto-Encoder for Vessel Trajectory Similarity Computation

no code implementations10 Jan 2021 Maohan Liang, Ryan Wen Liu, Shichen Li, Zhe Xiao, Xin Liu, Feng Lu

Based on the massive vessel trajectories collected, the CAE can learn the low-dimensional representations of informative trajectory images in an unsupervised manner.

Clustering Trajectory Clustering

OAAE: Adversarial Autoencoders for Novelty Detection in Multi-modal Normality Case via Orthogonalized Latent Space

no code implementations7 Jan 2021 Sungkwon An, Jeonghoon Kim, Myungjoo Kang, Shahbaz Razaei, Xin Liu

Specifically, we employ orthogonal low-rank embedding in the latent space to disentangle the features in the latent space using mutual class information.

Image Reconstruction Novelty Detection

MedWriter: Knowledge-Aware Medical Text Generation

no code implementations COLING 2020 Youcheng Pan, Qingcai Chen, Weihua Peng, Xiaolong Wang, Baotian Hu, Xin Liu, Junying Chen, Wenxiu Zhou

To exploit the domain knowledge to guarantee the correctness of generated text has been a hot topic in recent years, especially for high professional domains such as medical.

Text Generation

Multi-task MR Imaging with Iterative Teacher Forcing and Re-weighted Deep Learning

no code implementations27 Nov 2020 Kehan Qi, Yu Gong, Xinfeng Liu, Xin Liu, Hairong Zheng, Shanshan Wang

Noises, artifacts, and loss of information caused by the magnetic resonance (MR) reconstruction may compromise the final performance of the downstream applications.

Segmentation

Soft-Median Choice: An Automatic Feature Smoothing Method for Sound Event Detection

no code implementations25 Nov 2020 Fengnian Zhao, Ruwei Li, Xin Liu, Liwen Xu

In Sound Event Detection (SED) systems, the lengths of median filters for post-processing have never been optimized during training due to several problems.

Event Detection Sound Event Detection

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