Search Results for author: Xun Wang

Found 30 papers, 12 papers with code

Modality-Balanced Embedding for Video Retrieval

no code implementations18 Apr 2022 Xun Wang, Bingqing Ke, Xuanping Li, Fangyu Liu, Mingyu Zhang, Xiao Liang, Qiushi Xiao, Yue Yu

This modality imbalanceresults from a) modality gap: the relevance between a query and a video text is much easier to learn as the query is also a piece of text, with the same modality as the video text; b) data bias: most training samples can be solved solely by text matching.

Text Matching Video Retrieval

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.


Learning to Persuade

no code implementations29 Sep 2021 Xiaodong Liu, Zhikang Fan, Xun Wang, Weiran Shen

Then we update the sender model to obtain an approximately optimal scheme using the receiver model.

Combining Graph Neural Networks with Expert Knowledge for Smart Contract Vulnerability Detection

1 code implementation24 Jul 2021 Zhenguang Liu, Peng Qian, Xiaoyang Wang, Yuan Zhuang, Lin Qiu, Xun Wang

Then, we propose a novel temporal message propagation network to extract the graph feature from the normalized graph, and combine the graph feature with designed expert patterns to yield a final detection system.

Vulnerability Detection

Multi-scale super-resolution generation of low-resolution scanned pathological images

1 code implementation15 May 2021 Kai Sun, Yanhua Gao, Ting Xie, Xun Wang, Qingqing Yang, Le Chen, Kuansong Wang, Gang Yu

We design a strategy to scan slides with low resolution (5X) and a super-resolution method is proposed to restore the image details when in diagnosis.

SSIM Super-Resolution

Rethinking Deep Contrastive Learning with Embedding Memory

no code implementations25 Mar 2021 Haozhi Zhang, Xun Wang, Weilin Huang, Matthew R. Scott

Pair-wise loss functions have been extensively studied and shown to continuously improve the performance of deep metric learning (DML).

Contrastive Learning Metric Learning

Progressive Localization Networks for Language-based Moment Localization

no code implementations2 Feb 2021 Qi Zheng, Jianfeng Dong, Xiaoye Qu, Xun Yang, Yabing Wang, Pan Zhou, Baolong Liu, Xun Wang

The language-based setting of this task allows for an open set of target activities, resulting in a large variation of the temporal lengths of video moments.

Dual Encoding for Video Retrieval by Text

1 code implementation10 Sep 2020 Jianfeng Dong, Xirong Li, Chaoxi Xu, Xun Yang, Gang Yang, Xun Wang, Meng Wang

In this paper we achieve this by proposing a dual deep encoding network that encodes videos and queries into powerful dense representations of their own.

Ranked #3 on Ad-hoc video search on TRECVID-AVS16 (IACC.3) (using extra training data)

Ad-hoc video search Video Retrieval

Tree-Augmented Cross-Modal Encoding for Complex-Query Video Retrieval

no code implementations6 Jul 2020 Xun Yang, Jianfeng Dong, Yixin Cao, Xun Wang, Meng Wang, Tat-Seng Chua

To facilitate video retrieval with complex queries, we propose a Tree-augmented Cross-modal Encoding method by jointly learning the linguistic structure of queries and the temporal representation of videos.

Video Retrieval

Anisotropy links cell shapes to tissue flow during convergent extension

no code implementations14 May 2020 Xun Wang, Matthias Merkel, Leo B. Sutter, Gonca Erdemci-Tandogan, M. Lisa Manning, Karen E. Kasza

Within developing embryos, tissues flow and reorganize dramatically on timescales as short as minutes.

Feature Re-Learning with Data Augmentation for Video Relevance Prediction

1 code implementation8 Apr 2020 Jianfeng Dong, Xun Wang, Leimin Zhang, Chaoxi Xu, Gang Yang, Xirong Li

Predicting the relevance between two given videos with respect to their visual content is a key component for content-based video recommendation and retrieval.

Data Augmentation Frame

Channel Interaction Networks for Fine-Grained Image Categorization

no code implementations AAAI-2020 2020 Yu Gao, Xintong Han, Xun Wang, Weilin Huang, Matthew R. Scott

Fine-grained image categorization is challenging due to the subtle inter-class differences. We posit that exploiting the rich relationships between channels can help capture such differences since different channels correspond to different semantics.

Image Categorization Metric Learning

Cross-Batch Memory for Embedding Learning

2 code implementations CVPR 2020 Xun Wang, Haozhi Zhang, Weilin Huang, Matthew R. Scott

This suggests that the features of instances computed at preceding iterations can be used to considerably approximate their features extracted by the current model.

Image Retrieval Metric Learning

HAL: Improved Text-Image Matching by Mitigating Visual Semantic Hubs

1 code implementation22 Nov 2019 Fangyu Liu, Rongtian Ye, Xun Wang, Shuaipeng Li

The hubness problem widely exists in high-dimensional embedding space and is a fundamental source of error for cross-modal matching tasks.

Multi-Similarity Loss with General Pair Weighting for Deep Metric Learning

2 code implementations CVPR 2019 Xun Wang, Xintong Han, Weilin Huang, Dengke Dong, Matthew R. Scott

A family of loss functions built on pair-based computation have been proposed in the literature which provide a myriad of solutions for deep metric learning.

Image Retrieval Metric Learning

Modeling Word Relatedness in Latent Dirichlet Allocation

no code implementations10 Nov 2014 Xun Wang

Standard LDA model suffers the problem that the topic assignment of each word is independent and word correlation hence is neglected.

Topic Models

What a Nasty day: Exploring Mood-Weather Relationship from Twitter

no code implementations30 Oct 2014 Jiwei Li, Xun Wang, Eduard Hovy

While it has long been believed in psychology that weather somehow influences human's mood, the debates have been going on for decades about how they are correlated.

Time-dependent Hierarchical Dirichlet Model for Timeline Generation

no code implementations8 Dec 2013 Rumeng Li, Tao Wang, Xun Wang

Existing approaches neglect such hierarchical topic structure involved in the news corpus in timeline generation.

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