Search Results for author: Yifan Sun

Found 99 papers, 51 papers with code

Topic Modeling and Sentiment Analysis on Japanese Online Media's Coverage of Nuclear Energy

no code implementations27 Nov 2024 Yifan Sun, Hirofumi Tsuruta, Masaya Kumagai, Ken Kurosaki

Thirteen years after the Fukushima Daiichi nuclear power plant accident, Japan's nuclear energy accounts for only approximately 6% of electricity production, as most nuclear plants remain shut down.

Sentiment Analysis

SVIP: Towards Verifiable Inference of Open-source Large Language Models

no code implementations29 Oct 2024 Yifan Sun, Yuhang Li, Yue Zhang, Yuchen Jin, huan zhang

Open-source Large Language Models (LLMs) have recently demonstrated remarkable capabilities in natural language understanding and generation, leading to widespread adoption across various domains.

Natural Language Understanding

Iterative Methods via Locally Evolving Set Process

1 code implementation19 Oct 2024 Baojian Zhou, Yifan Sun, Reza Babanezhad Harikandeh, Xingzhi Guo, Deqing Yang, Yanghua Xiao

We propose to use the \textit{locally evolving set process}, a novel framework to characterize the algorithm locality, and demonstrate that many standard solvers can be effectively localized.

Independently-Normalized SGD for Generalized-Smooth Nonconvex Optimization

no code implementations17 Oct 2024 Yufeng Yang, Erin Tripp, Yifan Sun, Shaofeng Zou, Yi Zhou

Recent studies have shown that many nonconvex machine learning problems meet a so-called generalized-smooth condition that extends beyond traditional smooth nonconvex optimization.

Does RoBERTa Perform Better than BERT in Continual Learning: An Attention Sink Perspective

1 code implementation8 Oct 2024 Xueying Bai, Yifan Sun, Niranjan Balasubramanian

Such attention sinks may lead to models' over-smoothing in single-task learning and interference in sequential tasks' learning, which may compromise the models' CL performance despite their high pre-trained capabilities.

Continual Learning Diversity

Absolute State-wise Constrained Policy Optimization: High-Probability State-wise Constraints Satisfaction

no code implementations2 Oct 2024 WeiYe Zhao, Feihan Li, Yifan Sun, Yujie Wang, Rui Chen, Tianhao Wei, Changliu Liu

Our insight is that although it is intractable to guarantee hard state-wise constraints in a model-free setting, we can enforce state-wise safety with high probability while excluding strong assumptions.

Autonomous Driving continuous-control +3

Image Copy Detection for Diffusion Models

no code implementations30 Sep 2024 Wenhao Wang, Yifan Sun, Zhentao Tan, Yi Yang

Existing Image Copy Detection (ICD) models, though accurate in detecting hand-crafted replicas, overlook the challenge from diffusion models.

Copy Detection Marketing

MonoFormer: One Transformer for Both Diffusion and Autoregression

1 code implementation24 Sep 2024 Chuyang Zhao, Yuxing Song, Wenhao Wang, Haocheng Feng, Errui Ding, Yifan Sun, Xinyan Xiao, Jingdong Wang

Most existing multimodality methods use separate backbones for autoregression-based discrete text generation and diffusion-based continuous visual generation, or the same backbone by discretizing the visual data to use autoregression for both text and visual generation.

Image Generation Text Generation

Active Reconfigurable Intelligent Surface Empowered Synthetic Aperture Radar Imaging

no code implementations18 Sep 2024 Yifan Sun, Rang Liu, Zhiping Lu, Honghao Luo, Ming Li, Qian Liu

In this paper, we first present a range-Doppler (RD) imaging algorithm to obtain imaging results for the proposed ARIS-empowered SAR system.

Knowledge Distillation via Query Selection for Detection Transformer

no code implementations10 Sep 2024 Yi Liu, Luting Wang, Zongheng Tang, Yue Liao, Yifan Sun, Lijun Zhang, Si Liu

Transformers have revolutionized the object detection landscape by introducing DETRs, acclaimed for their simplicity and efficacy.

Knowledge Distillation object-detection +1

2D-OOB: Attributing Data Contribution Through Joint Valuation Framework

2 code implementations7 Aug 2024 Yifan Sun, Jingyan Shen, Yongchan Kwon

Data valuation has emerged as a powerful framework for quantifying each datum's contribution to the training of a machine learning model.

Data Poisoning Data Valuation

AutoScale: Automatic Prediction of Compute-optimal Data Composition for Training LLMs

1 code implementation29 Jul 2024 Feiyang Kang, Yifan Sun, Bingbing Wen, Si Chen, Dawn Song, Rafid Mahmood, Ruoxi Jia

Domain reweighting is an emerging research area aimed at adjusting the relative weights of different data sources to improve the effectiveness and efficiency of language model pre-training.

Bilevel Optimization Language Modelling +1

LaMI-DETR: Open-Vocabulary Detection with Language Model Instruction

1 code implementation16 Jul 2024 Penghui Du, Yu Wang, Yifan Sun, Luting Wang, Yue Liao, Gang Zhang, Errui Ding, Yan Wang, Jingdong Wang, Si Liu

Existing methods enhance open-vocabulary object detection by leveraging the robust open-vocabulary recognition capabilities of Vision-Language Models (VLMs), such as CLIP. However, two main challenges emerge:(1) A deficiency in concept representation, where the category names in CLIP's text space lack textual and visual knowledge.

Language Modelling object-detection +1

Replication in Visual Diffusion Models: A Survey and Outlook

1 code implementation7 Jul 2024 Wenhao Wang, Yifan Sun, Zongxin Yang, Zhengdong Hu, Zhentao Tan, Yi Yang

In this survey, we provide the first comprehensive review of replication in visual diffusion models, marking a novel contribution to the field by systematically categorizing the existing studies into unveiling, understanding, and mitigating this phenomenon.

Benchmarking Survey

Reachability Analysis for Linear Systems with Uncertain Parameters using Polynomial Zonotopes

no code implementations16 Jun 2024 Yushen Huang, Ertai Luo, Stanley Bak, Yifan Sun

We present a reachability algorithm for linear systems with uncertain parameters and inputs using set propagation of polynomial zonotopes.

Assessing Model Generalization in Vicinity

1 code implementation13 Jun 2024 Yuchi Liu, Yifan Sun, Jingdong Wang, Liang Zheng

This paper evaluates the generalization ability of classification models on out-of-distribution test sets without depending on ground truth labels.

Dense Connector for MLLMs

1 code implementation22 May 2024 Huanjin Yao, Wenhao Wu, Taojiannan Yang, Yuxin Song, Mengxi Zhang, Haocheng Feng, Yifan Sun, Zhiheng Li, Wanli Ouyang, Jingdong Wang

We witness the rise of larger and higher-quality instruction datasets, as well as the involvement of larger-sized LLMs.

Video Understanding

Automated Multi-level Preference for MLLMs

1 code implementation18 May 2024 Mengxi Zhang, Wenhao Wu, Yu Lu, Yuxin Song, Kang Rong, Huanjin Yao, Jianbo Zhao, Fanglong Liu, Yifan Sun, Haocheng Feng, Jingdong Wang

To verify our viewpoint, we present the Automated Multi-level Preference (AMP) framework for MLLMs.

Hallucination

Get more for less: Principled Data Selection for Warming Up Fine-Tuning in LLMs

no code implementations5 May 2024 Feiyang Kang, Hoang Anh Just, Yifan Sun, Himanshu Jahagirdar, Yuanzhi Zhang, Rongxing Du, Anit Kumar Sahu, Ruoxi Jia

The goal is to minimize the need for costly domain-specific data for subsequent fine-tuning while achieving desired performance levels.

Language Modelling

AnyPattern: Towards In-context Image Copy Detection

2 code implementations21 Apr 2024 Wenhao Wang, Yifan Sun, Zhentao Tan, Yi Yang

To accommodate the "seen $\rightarrow$ unseen" generalization scenario, we construct the first large-scale pattern dataset named AnyPattern, which has the largest number of tamper patterns ($90$ for training and $10$ for testing) among all the existing ones.

Copy Detection In-Context Learning

MS-DETR: Efficient DETR Training with Mixed Supervision

1 code implementation CVPR 2024 Chuyang Zhao, Yifan Sun, Wenhao Wang, Qiang Chen, Errui Ding, Yi Yang, Jingdong Wang

The traditional training procedure using one-to-one supervision in the original DETR lacks direct supervision for the object detection candidates.

Decoder Object +2

EASE-DETR: Easing the Competition among Object Queries

no code implementations CVPR 2024 Yulu Gao, Yifan Sun, Xudong Ding, Chuyang Zhao, Si Liu

This paper views the DETR's non-duplicate detection ability as a competition result among object queries.

Decoder Object

Representation of forward performance criteria with random endowment via FBSDE and application to forward optimized certainty equivalent

no code implementations29 Dec 2023 Gechun Liang, Yifan Sun, Thaleia Zariphopoulou

We, also, consider representative examples for both forward performance criteria with random endowment and forward OCE, and for the case of exponential criteria, we investigate the connection between forward OCE and forward entropic risk measures.

Stochastic Optimization

Understanding News Creation Intents: Frame, Dataset, and Method

1 code implementation27 Dec 2023 Zhengjia Wang, Danding Wang, Qiang Sheng, Juan Cao, Silong Su, Yifan Sun, Beizhe Hu, Siyuan Ma

As the disruptive changes in the media economy and the proliferation of alternative news media outlets, news intent has progressively deviated from ethical standards that serve the public interest.

Philosophy

On Mask-based Image Set Desensitization with Recognition Support

no code implementations14 Dec 2023 Qilong Li, Ji Liu, Yifan Sun, Chongsheng Zhang, Dejing Dou

In addition, we propose a feature selection masknet as the model adjustment method to improve the performance based on the masked images.

feature selection

Real-time Estimation of DoS Duration and Frequency for Security Control

no code implementations10 Dec 2023 Yifan Sun, Jianquan Lu, Daniel W. C. Ho, Lulu Li

In this paper, we develop a new denial-of-service (DoS) estimator, enabling defenders to identify duration and frequency parameters of any DoS attacker, except for three edge cases, exclusively using real-time data.

Data Acquisition: A New Frontier in Data-centric AI

no code implementations22 Nov 2023 Lingjiao Chen, Bilge Acun, Newsha Ardalani, Yifan Sun, Feiyang Kang, Hanrui Lyu, Yongchan Kwon, Ruoxi Jia, Carole-Jean Wu, Matei Zaharia, James Zou

As Machine Learning (ML) systems continue to grow, the demand for relevant and comprehensive datasets becomes imperative.

Absolute Policy Optimization

1 code implementation20 Oct 2023 WeiYe Zhao, Feihan Li, Yifan Sun, Rui Chen, Tianhao Wei, Changliu Liu

In recent years, trust region on-policy reinforcement learning has achieved impressive results in addressing complex control tasks and gaming scenarios.

Atari Games continuous-control +1

A Lightweight and Transferable Design for Robust LEGO Manipulation

no code implementations5 Sep 2023 Ruixuan Liu, Yifan Sun, Changliu Liu

Experiments demonstrate that the EOAT can reliably manipulate Lego bricks and the learning framework can effectively and safely improve the manipulation performance to a 100% success rate.

Industrial Robots

Large-Scale Person Detection and Localization using Overhead Fisheye Cameras

no code implementations ICCV 2023 Lu Yang, Liulei Li, Xueshi Xin, Yifan Sun, Qing Song, Wenguan Wang

Instead of existing efforts devoted to localizing tourist photos captured by perspective cameras, in this article, we focus on devising person positioning solutions using overhead fisheye cameras.

Human Detection

State-wise Constrained Policy Optimization

1 code implementation21 Jun 2023 WeiYe Zhao, Rui Chen, Yifan Sun, Tianhao Wei, Changliu Liu

In particular, we introduce the framework of Maximum Markov Decision Process, and prove that the worst-case safety violation is bounded under SCPO.

Autonomous Driving reinforcement-learning +3

Jigsaw: Learning to Assemble Multiple Fractured Objects

1 code implementation NeurIPS 2023 Jiaxin Lu, Yifan Sun, QiXing Huang

Our framework consists of four components: (1) front-end point feature extractor with attention layers, (2) surface segmentation to separate fracture and original parts, (3) multi-parts matching to find correspondences among fracture surface points, and (4) robust global alignment to recover the global poses of the pieces.

Whitening-based Contrastive Learning of Sentence Embeddings

1 code implementation28 May 2023 Wenjie Zhuo, Yifan Sun, Xiaohan Wang, Linchao Zhu, Yi Yang

Consequently, using multiple positive samples with enhanced diversity further improves contrastive learning due to better alignment.

Contrastive Learning Diversity +5

Fast Online Node Labeling for Very Large Graphs

1 code implementation25 May 2023 Baojian Zhou, Yifan Sun, Reza Babanezhad

This paper studies the online node classification problem under a transductive learning setting.

Node Classification Transductive Learning

GUARD: A Safe Reinforcement Learning Benchmark

1 code implementation23 May 2023 WeiYe Zhao, Yifan Sun, Feihan Li, Rui Chen, Ruixuan Liu, Tianhao Wei, Changliu Liu

Due to the diversity of algorithms and tasks, it remains difficult to compare existing safe RL algorithms.

Autonomous Driving Diversity +4

On the Difficulty of Intersection Checking with Polynomial Zonotopes

no code implementations17 May 2023 Yushen Huang, Ertai Luo, Stanley Bak, Yifan Sun

The standard method for intersection checking with polynomial zonotopes is a two-part algorithm that overapproximates a polynomial zonotope with a regular zonotope and then, if the overapproximation error is deemed too large, splits the set and recursively tries again.

Motion Planning

Feature-compatible Progressive Learning for Video Copy Detection

2 code implementations20 Apr 2023 Wenhao Wang, Yifan Sun, Yi Yang

Video Copy Detection (VCD) has been developed to identify instances of unauthorized or duplicated video content.

Copy Detection Video Similarity

DETR with Additional Global Aggregation for Cross-domain Weakly Supervised Object Detection

no code implementations CVPR 2023 Zongheng Tang, Yifan Sun, Si Liu, Yi Yang

Second, through our design, the object queries and the foreground query in the decoder share consensus on the class semantics, therefore making the strong and weak supervision mutually benefit each other for domain alignment.

Decoder object-detection +1

TransHP: Image Classification with Hierarchical Prompting

1 code implementation NeurIPS 2023 Wenhao Wang, Yifan Sun, Wei Li, Yi Yang

This paper explores a hierarchical prompting mechanism for the hierarchical image classification (HIC) task.

Classification Image Classification

Reducing Discretization Error in the Frank-Wolfe Method

no code implementations4 Apr 2023 Zhaoyue Chen, Yifan Sun

The Frank-Wolfe algorithm is a popular method in structurally constrained machine learning applications, due to its fast per-iteration complexity.

Exploring Expression-related Self-supervised Learning for Affective Behaviour Analysis

1 code implementation18 Mar 2023 Fanglei Xue, Yifan Sun, Yi Yang

This paper explores an expression-related self-supervised learning (SSL) method (ContraWarping) to perform expression classification in the 5th Affective Behavior Analysis in-the-wild (ABAW) competition.

Self-Supervised Learning

A Unified Continual Learning Framework with General Parameter-Efficient Tuning

1 code implementation ICCV 2023 Qiankun Gao, Chen Zhao, Yifan Sun, Teng Xi, Gang Zhang, Bernard Ghanem, Jian Zhang

1) Learning: the pre-trained model adapts to the new task by tuning an online PET module, along with our adaptation speed calibration to align different PET modules, 2) Accumulation: the task-specific knowledge learned by the online PET module is accumulated into an offline PET module through momentum update, 3) Ensemble: During inference, we respectively construct two experts with online/offline PET modules (which are favored by the novel/historical tasks) for prediction ensemble.

Continual Learning

Unsupervised Facial Expression Representation Learning with Contrastive Local Warping

1 code implementation16 Mar 2023 Fanglei Xue, Yifan Sun, Yi Yang

Therefore, given a facial image, ContraWarping employs some global transformations and local warping to generate its positive and negative samples and sets up a novel contrastive learning framework.

Contrastive Learning Facial Expression Recognition +4

MMA-RNN: A Multi-level Multi-task Attention-based Recurrent Neural Network for Discrimination and Localization of Atrial Fibrillation

1 code implementation7 Feb 2023 Yifan Sun, Jingyan Shen, Yunfan Jiang, Zhaohui Huang, Minsheng Hao, Xuegong Zhang

The automatic detection of atrial fibrillation based on electrocardiograph (ECG) signals has received wide attention both clinically and practically.

Pose Synchronization Under Multiple Pair-Wise Relative Poses

no code implementations CVPR 2023 Yifan Sun, QiXing Huang

The first step performs diffusion and clustering to compute the candidate poses of the input objects.

Context-Aware Pretraining for Efficient Blind Image Decomposition

1 code implementation CVPR 2023 Chao Wang, Zhedong Zheng, Ruijie Quan, Yifan Sun, Yi Yang

(2) The conventional paradigm usually focuses on mining the abnormal pattern of a superimposed image to separate the noise, which de facto conflicts with the primary image restoration task.

Attribute Image Reconstruction +1

ProD: Prompting-To-Disentangle Domain Knowledge for Cross-Domain Few-Shot Image Classification

no code implementations CVPR 2023 Tianyi Ma, Yifan Sun, Zongxin Yang, Yi Yang

Based on these two common practices, the key point of ProD is using the prompting mechanism in the transformer to disentangle the domain-general (DG) and domain-specific (DS) knowledge from the backbone feature.

Cross-Domain Few-Shot Domain Generalization +1

Semisoft Task Clustering for Multi-Task Learning

no code implementations28 Nov 2022 Yuzhao Zhang, Yifan Sun

Motivated by the idea of semisoft clustering of data, we propose a semisoft task clustering approach, which can simultaneously reveal the task cluster structure for both pure and mixed tasks as well as select the relevant features.

Clustering Multi-Task Learning

An adaptive shortest-solution guided decimation approach to sparse high-dimensional linear regression

1 code implementation28 Nov 2022 Xue Yu, Yifan Sun, HaiJun Zhou

High-dimensional linear regression model is the most popular statistical model for high-dimensional data, but it is quite a challenging task to achieve a sparse set of regression coefficients.

regression

Clustered Federated Learning based on Nonconvex Pairwise Fusion

1 code implementation8 Nov 2022 Xue Yu, Ziyi Liu, Wu Wang, Yifan Sun

We propose a clustered FL framework that incorporates a nonconvex penalty to pairwise differences of parameters.

Federated Learning

A Multistep Frank-Wolfe Method

no code implementations14 Oct 2022 Zhaoyue Chen, Yifan Sun

The Frank-Wolfe algorithm has regained much interest in its use in structurally constrained machine learning applications.

Feature-Proxy Transformer for Few-Shot Segmentation

2 code implementations13 Oct 2022 Jian-Wei Zhang, Yifan Sun, Yi Yang, Wei Chen

With a rethink of recent advances, we find that the current FSS framework has deviated far from the supervised segmentation framework: Given the deep features, FSS methods typically use an intricate decoder to perform sophisticated pixel-wise matching, while the supervised segmentation methods use a simple linear classification head.

Decoder Few-Shot Semantic Segmentation +2

V$^2$L: Leveraging Vision and Vision-language Models into Large-scale Product Retrieval

1 code implementation26 Jul 2022 Wenhao Wang, Yifan Sun, Zongxin Yang, Yi Yang

While model ensemble is common, we show that combining the vision models and vision-language models brings particular benefits from their complementarity and is a key factor to our superiority.

Metric Learning Retrieval

SRCN3D: Sparse R-CNN 3D for Compact Convolutional Multi-View 3D Object Detection and Tracking

2 code implementations29 Jun 2022 Yining Shi, Jingyan Shen, Yifan Sun, Yunlong Wang, Jiaxin Li, Shiqi Sun, Kun Jiang, Diange Yang

Our novel sparse feature sampling module only utilizes local 2D region of interest (RoI) features calculated by the projection of 3D query boxes for further box refinement, leading to a fully-convolutional and deployment-friendly pipeline.

3D Multi-Object Tracking 3D Object Detection +4

Accelerating Frank-Wolfe via Averaging Step Directions

no code implementations24 May 2022 Zhaoyue Chen, Yifan Sun

The Frank-Wolfe method is a popular method in sparse constrained optimization, due to its fast per-iteration complexity.

A Benchmark and Asymmetrical-Similarity Learning for Practical Image Copy Detection

1 code implementation24 May 2022 Wenhao Wang, Yifan Sun, Yi Yang

Moreover, this paper further reveals a unique difficulty for solving the hard negative problem in ICD, i. e., there is a fundamental conflict between current metric learning and ICD.

Copy Detection Metric Learning

Bridging the Source-to-target Gap for Cross-domain Person Re-Identification with Intermediate Domains

1 code implementation3 Mar 2022 Yongxing Dai, Yifan Sun, Jun Liu, Zekun Tong, Yi Yang, Ling-Yu Duan

Instead of directly aligning the source and target domains against each other, we propose to align the source and target domains against their intermediate domains for a smooth knowledge transfer.

Domain Generalization Person Re-Identification +1

Action Keypoint Network for Efficient Video Recognition

no code implementations17 Jan 2022 Xu Chen, Yahong Han, Xiaohan Wang, Yifan Sun, Yi Yang

An effective approach is to select informative content from the holistic video, yielding a popular family of dynamic video recognition methods.

Action Recognition Point Cloud Classification +1

Learning Memory-Augmented Unidirectional Metrics for Cross-Modality Person Re-Identification

no code implementations CVPR 2022 Jialun Liu, Yifan Sun, Feng Zhu, Hongbin Pei, Yi Yang, Wenhui Li

These two unidirectional metrics (IR image to RGB proxy and RGB image to IR proxy) jointly alleviate the relay effect and benefit cross-modality association.

Cross-Modality Person Re-identification Person Re-Identification

Modality-Aware Triplet Hard Mining for Zero-shot Sketch-Based Image Retrieval

1 code implementation15 Dec 2021 Zongheng Huang, Yifan Sun, Chuchu Han, Changxin Gao, Nong Sang

By combining two fundamental learning approaches in DML, e. g., classification training and pairwise training, we set up a strong baseline for ZS-SBIR.

Metric Learning Retrieval +2

Multiple Fusion Adaptation: A Strong Framework for Unsupervised Semantic Segmentation Adaptation

1 code implementation1 Dec 2021 Kai Zhang, Yifan Sun, Rui Wang, Haichang Li, Xiaohui Hu

MFA basically considers three parallel information fusion strategies, i. e., the cross-model fusion, temporal fusion and a novel online-offline pseudo label fusion.

Pseudo Label Segmentation +3

D$^2$LV: A Data-Driven and Local-Verification Approach for Image Copy Detection

1 code implementation13 Nov 2021 Wenhao Wang, Yifan Sun, Weipu Zhang, Yi Yang

In this paper, a data-driven and local-verification (D$^2$LV) approach is proposed to compete for Image Similarity Challenge: Matching Track at NeurIPS'21.

Copy Detection Unsupervised Pre-training

Bag of Tricks and A Strong baseline for Image Copy Detection

1 code implementation13 Nov 2021 Wenhao Wang, Weipu Zhang, Yifan Sun, Yi Yang

In this paper, a bag of tricks and a strong baseline are proposed for image copy detection.

Copy Detection Unsupervised Pre-training

Spatial Ensemble: a Novel Model Smoothing Mechanism for Student-Teacher Framework

1 code implementation NeurIPS 2021 Tengteng Huang, Yifan Sun, Xun Wang, Haotian Yao, Chi Zhang

Model smoothing is of central importance for obtaining a reliable teacher model in the student-teacher framework, where the teacher generates surrogate supervision signals to train the student.

Unity

Switch to Generalize: Domain-Switch Learning for Cross-Domain Few-Shot Classification

no code implementations ICLR 2022 Zhengdong Hu, Yifan Sun, Yi Yang

We hold a hypothesis, i. e., if a deep model is capable to fast generalize itself to different domains (using very few samples) during training, it will maintain such domain generalization capacity for testing.

Cross-Domain Few-Shot Domain Generalization

IDM: An Intermediate Domain Module for Domain Adaptive Person Re-ID

3 code implementations ICCV 2021 Yongxing Dai, Jun Liu, Yifan Sun, Zekun Tong, Chi Zhang, Ling-Yu Duan

To ensure these two properties to better characterize appropriate intermediate domains, we enforce the bridge losses on intermediate domains' prediction space and feature space, and enforce a diversity loss on the two domain factors.

Diversity Domain Adaptive Person Re-Identification +1

Screening for a Reweighted Penalized Conditional Gradient Method

no code implementations2 Jul 2021 Yifan Sun, Francis Bach

We couple this with a screening rule which is safe in the convex case, converging to the true support at a rate $O(1/(\delta^2))$ where $\delta \geq 0$ measures how close the problem is to degeneracy.

Approximate Frank-Wolfe Algorithms over Graph-structured Support Sets

1 code implementation29 Jun 2021 Baojian Zhou, Yifan Sun

In this paper, we consider approximate Frank-Wolfe (FW) algorithms to solve convex optimization problems over graph-structured support sets where the linear minimization oracle (LMO) cannot be efficiently obtained in general.

Learning View Selection for 3D Scenes

no code implementations CVPR 2021 Yifan Sun, QiXing Huang, Dun-Yu Hsiao, Li Guan, Gang Hua

Efficient 3D space sampling to represent an underlying3D object/scene is essential for 3D vision, robotics, and be-yond.

Dynamic Metric Learning: Towards a Scalable Metric Space to Accommodate Multiple Semantic Scales

1 code implementation CVPR 2021 Yifan Sun, Yuke Zhu, Yuhan Zhang, Pengkun Zheng, Xi Qiu, Chi Zhang, Yichen Wei

%We argue that such flexibility is also important for deep metric learning, because different visual concepts indeed correspond to different semantic scales.

Metric Learning

Latent Group Structured Multi-task Learning

no code implementations24 Nov 2020 Xiangyu Niu, Yifan Sun, Jinyuan Sun

In multi-task learning (MTL), we improve the performance of key machine learning algorithms by training various tasks jointly.

Multi-Task Learning

Memory-based Jitter: Improving Visual Recognition on Long-tailed Data with Diversity In Memory

no code implementations22 Aug 2020 Jialun Liu, Jingwei Zhang, Yi Yang, Wenhui Li, Chi Zhang, Yifan Sun

With slight modifications, MBJ is applicable for two fundamental visual recognition tasks, \emph{i. e.}, deep image classification and deep metric learning (on long-tailed data).

Data Augmentation Diversity +5

CycAs: Self-supervised Cycle Association for Learning Re-identifiable Descriptions

no code implementations ECCV 2020 Zhongdao Wang, Jingwei Zhang, Liang Zheng, Yixuan Liu, Yifan Sun, Ya-Li Li, Shengjin Wang

This paper proposes a self-supervised learning method for the person re-identification (re-ID) problem, where existing unsupervised methods usually rely on pseudo labels, such as those from video tracklets or clustering.

Clustering Multi-Object Tracking +2

Embodied Self-supervised Learning by Coordinated Sampling and Training

no code implementations20 Jun 2020 Yifan Sun, Xihong Wu

The proposed approach works in an analysis-by-synthesis manner to learn an inference network by iteratively sampling and training.

Self-Supervised Learning

Deep Representation Learning on Long-tailed Data: A Learnable Embedding Augmentation Perspective

no code implementations CVPR 2020 Jialun Liu, Yifan Sun, Chuchu Han, Zhaopeng Dou, Wenhui Li

If a sample belongs to a tail class, the corresponding feature cloud will have relatively large distribution range, in compensation to its lack of diversity.

Diversity Face Recognition +2

Circle Loss: A Unified Perspective of Pair Similarity Optimization

14 code implementations CVPR 2020 Yifan Sun, Changmao Cheng, Yuhan Zhang, Chi Zhang, Liang Zheng, Zhongdao Wang, Yichen Wei

This paper provides a pair similarity optimization viewpoint on deep feature learning, aiming to maximize the within-class similarity $s_p$ and minimize the between-class similarity $s_n$.

 Ranked #1 on Face Verification on IJB-C (training dataset metric)

Face Recognition Face Verification +5

Safe Screening for the Generalized Conditional Gradient Method

no code implementations22 Feb 2020 Yifan Sun, Francis Bach

The conditional gradient method (CGM) has been widely used for fast sparse approximation, having a low per iteration computational cost for structured sparse regularizers.

feature selection

K-Best Transformation Synchronization

no code implementations ICCV 2019 Yifan Sun, Jiacheng Zhuo, Arnav Mohan, Qixing Huang

In this paper, we introduce the problem of K-best transformation synchronization for the purpose of multiple scan matching.

Clustering

Learning low-dimensional state embeddings and metastable clusters from time series data

no code implementations NeurIPS 2019 Yifan Sun, Yaqi Duan, Hao Gong, Mengdi Wang

This paper studies how to find compact state embeddings from high-dimensional Markov state trajectories, where the transition kernel has a small intrinsic rank.

Clustering Time Series +1

Perceive Where to Focus: Learning Visibility-aware Part-level Features for Partial Person Re-identification

1 code implementation CVPR 2019 Yifan Sun, Qin Xu, Ya-Li Li, Chi Zhang, Yikang Li, Shengjin Wang, Jian Sun

The visibility awareness allows VPM to extract region-level features and compare two images with focus on their shared regions (which are visible on both images).

Person Re-Identification

Joint Map and Symmetry Synchronization

no code implementations ECCV 2018 Yifan Sun, Zhenxiao Liang, Xiangru Huang, Qi-Xing Huang

Most existing techniques in map computation (e. g., in the form of feature or dense correspondences) assume that the underlying map between an object pair is unique.

Object

Redundancy Techniques for Straggler Mitigation in Distributed Optimization and Learning

no code implementations14 Mar 2018 Can Karakus, Yifan Sun, Suhas Diggavi, Wotao Yin

Performance of distributed optimization and learning systems is bottlenecked by "straggler" nodes and slow communication links, which significantly delay computation.

Distributed Optimization regression

Wide Compression: Tensor Ring Nets

no code implementations CVPR 2018 Wenqi Wang, Yifan Sun, Brian Eriksson, Wenlin Wang, Vaneet Aggarwal

Deep neural networks have demonstrated state-of-the-art performance in a variety of real-world applications.

Image Classification

Deep Unsupervised Clustering Using Mixture of Autoencoders

1 code implementation21 Dec 2017 Dejiao Zhang, Yifan Sun, Brian Eriksson, Laura Balzano

Unsupervised clustering is one of the most fundamental challenges in machine learning.

Clustering

A Simple Approach to Learn Polysemous Word Embeddings

2 code implementations6 Jul 2017 Yifan Sun, Nikhil Rao, Weicong Ding

Evaluating these methods is also problematic, as rigorous quantitative evaluations in this space is limited, especially when compared with single-sense embeddings.

Relevance Detection Representation Learning +3

Dynamic Word Embeddings for Evolving Semantic Discovery

2 code implementations2 Mar 2017 Zijun Yao, Yifan Sun, Weicong Ding, Nikhil Rao, Hui Xiong

Word evolution refers to the changing meanings and associations of words throughout time, as a byproduct of human language evolution.

Representation Learning Word Embeddings

Probabilistic Reconstruction in Compressed Sensing: Algorithms, Phase Diagrams, and Threshold Achieving Matrices

1 code implementation18 Jun 2012 Florent Krzakala, Marc Mézard, François Sausset, Yifan Sun, Lenka Zdeborová

We further develop the asymptotic analysis of the corresponding phase diagrams with and without measurement noise, for different distribution of signals, and discuss the best possible reconstruction performances regardless of the algorithm.

Statistical Mechanics Information Theory Information Theory

Statistical physics-based reconstruction in compressed sensing

1 code implementation20 Sep 2011 Florent Krzakala, Marc Mézard, François Sausset, Yifan Sun, Lenka Zdeborová

Compressed sensing is triggering a major evolution in signal acquisition.

Statistical Mechanics Information Theory Information Theory

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