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Unsupervised extractive summarization aims to extract salient sentences from a document as the summary without labeled data. Recent literatures mostly research how to leverage sentence similarity to rank sentences in the order of salience.…

Computation and Language · Computer Science 2023-02-27 Shichao Sun , Ruifeng Yuan , Wenjie Li , Sujian Li

In various natural language processing (NLP) tasks, fine-tuning Pre-trained Language Models (PLMs) often leads to the issue of spurious correlations, which negatively impacts performance, particularly when dealing with out-of-distribution…

Computation and Language · Computer Science 2025-04-17 Suyoung Bae , Hyojun Kim , YunSeok Choi , Jee-Hyong Lee

Modern techniques like contrastive learning have been effectively used in many areas, including computer vision, natural language processing, and graph-structured data. Creating positive examples that assist the model in learning robust and…

Machine Learning · Computer Science 2024-02-19 Xu Zheng , Tianchun Wang , Wei Cheng , Aitian Ma , Haifeng Chen , Mo Sha , Dongsheng Luo

Self-supervision has emerged as a propitious method for visual representation learning after the recent paradigm shift from handcrafted pretext tasks to instance-similarity based approaches. Most state-of-the-art methods enforce similarity…

Computer Vision and Pattern Recognition · Computer Science 2022-10-19 Sravanti Addepalli , Kaushal Bhogale , Priyam Dey , R. Venkatesh Babu

Supervised learning can improve the design of state-of-the-art solvers for combinatorial problems, but labelling large numbers of combinatorial instances is often impractical due to exponential worst-case complexity. Inspired by the recent…

Machine Learning · Computer Science 2022-06-22 Haonan Duan , Pashootan Vaezipoor , Max B. Paulus , Yangjun Ruan , Chris J. Maddison

Addressing the challenges related to data sparsity, cold-start problems, and diversity in recommendation systems is both crucial and demanding. Many current solutions leverage knowledge graphs to tackle these issues by combining both…

Information Retrieval · Computer Science 2024-03-28 Yejin Kim , Scott Rome , Kevin Foley , Mayur Nankani , Rimon Melamed , Javier Morales , Abhay Yadav , Maria Peifer , Sardar Hamidian , H. Howie Huang

As advances in artificial intelligence enable increasingly capable learning-based autonomous agents, it becomes more challenging for human observers to efficiently construct a mental model of the agent's behaviour. In order to successfully…

Robotics · Computer Science 2023-04-04 Peter Du , Surya Murthy , Katherine Driggs-Campbell

Recent works in self-supervised learning have advanced the state-of-the-art by relying on the contrastive learning paradigm, which learns representations by pushing positive pairs, or similar examples from the same class, closer together…

Machine Learning · Computer Science 2022-06-27 Jeff Z. HaoChen , Colin Wei , Adrien Gaidon , Tengyu Ma

What matters for contrastive learning? We argue that contrastive learning heavily relies on informative features, or "hard" (positive or negative) features. Early works include more informative features by applying complex data…

Computer Vision and Pattern Recognition · Computer Science 2023-08-10 Jiangmeng Li , Wenwen Qiang , Changwen Zheng , Bing Su , Hui Xiong

Data augmentation methods have been shown to be a fundamental technique to improve generalization in tasks such as image, text and audio classification. Recently, automated augmentation methods have led to further improvements on image…

Machine Learning · Computer Science 2021-02-17 Elizabeth Fons , Paula Dawson , Xiao-jun Zeng , John Keane , Alexandros Iosifidis

Contrastive learning (CL) recently has spurred a fruitful line of research in the field of recommendation, since its ability to extract self-supervised signals from the raw data is well-aligned with recommender systems' needs for tackling…

Information Retrieval · Computer Science 2022-05-10 Junliang Yu , Hongzhi Yin , Xin Xia , Tong Chen , Lizhen Cui , Quoc Viet Hung Nguyen

The performance of state-of-the-art neural rankers can deteriorate substantially when exposed to noisy inputs or applied to a new domain. In this paper, we present a novel method for fine-tuning neural rankers that can significantly improve…

Information Retrieval · Computer Science 2021-06-01 Xiaofei Ma , Cicero Nogueira dos Santos , Andrew O. Arnold

The success of contrastive learning is well known to be dependent on data augmentation. Although the degree of data augmentations has been well controlled by utilizing pre-defined techniques in some domains like vision, time-series data…

Machine Learning · Computer Science 2023-12-22 Berken Utku Demirel , Christian Holz

User preference prediction requires a comprehensive and accurate understanding of individual tastes. This includes both surface-level attributes, such as color and style, and deeper content-related aspects, such as themes and composition.…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Wenyi Mo , Ying Ba , Tianyu Zhang , Yalong Bai , Biye Li

For low-semantic sensor signals from human activity recognition (HAR), contrastive learning (CL) is essential to implement novel applications or generic models without manual annotation, which is a high-performance self-supervised learning…

Machine Learning · Computer Science 2026-02-04 Qingyu Wu , Jianfei Shen , Feiyi Fan , Yang Gu , Chenyang Xu , Yiqiang Chen

The success of contrastive learning depends on the construction and utilization of high-quality positive pairs. However, current methods face critical limitations on two fronts: on the construction side, both handcrafted and generative…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Xiaojie Li , Bei Wang , Wei Liu , Jianlong Wu , Yue Yu , Liqiang Nie , Min Zhang

User representation is essential for providing high-quality commercial services in industry. Universal user representation has received many interests recently, with which we can be free from the cumbersome work of training a specific model…

Machine Learning · Computer Science 2021-11-15 Qinghui Sun , Jie Gu , Bei Yang , XiaoXiao Xu , Renjun Xu , Shangde Gao , Hong Liu , Huan Xu

Many real-world phenomena are observed at multiple resolutions. Predictive models designed to predict these phenomena typically consider different resolutions separately. This approach might be limiting in applications where predictions are…

Machine Learning · Computer Science 2020-01-07 Guruprasad Nayak , Rahul Ghosh , Xiaowei Jia , Varun Mithal , Vipin Kumar

Recently, contrastive learning has achieved great results in self-supervised learning, where the main idea is to push two augmentations of an image (positive pairs) closer compared to other random images (negative pairs). We argue that not…

Computer Vision and Pattern Recognition · Computer Science 2021-09-13 Ajinkya Tejankar , Soroush Abbasi Koohpayegani , Vipin Pillai , Paolo Favaro , Hamed Pirsiavash

The sequential recommendation (SR) task aims to predict the next item based on users' historical interaction sequences. Typically trained on historical data, SR models often struggle to adapt to real-time preference shifts during inference…

Information Retrieval · Computer Science 2026-04-08 Xing Tang , Jingyang Bin , Ziqiang Cui , Xiaokun Zhang , Fuyuan Lyu , Jingyan Jiang , Dugang Liu , Chen Ma , Xiuqiang He