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The learn-to-compare paradigm of contrastive representation learning (CRL), which compares positive samples with negative ones for representation learning, has achieved great success in a wide range of domains, including natural language…

信息检索 · 计算机科学 2022-06-02 Lanling Xu , Jianxun Lian , Wayne Xin Zhao , Ming Gong , Linjun Shou , Daxin Jiang , Xing Xie , Ji-Rong Wen

The generation of toxic content by large language models (LLMs) remains a critical challenge for the safe deployment of language technology. We propose a novel framework for implicit knowledge editing and controlled text generation by…

计算与语言 · 计算机科学 2025-06-02 Tassilo Klein , Moin Nabi

Contrastive learning produces coherent semantic feature embeddings by encouraging positive samples to cluster closely while separating negative samples. However, existing contrastive learning methods lack principled guarantees on coverage…

机器学习 · 计算机科学 2026-03-30 Yahya Alkhatib , Wee Peng Tay

As a representative self-supervised method, contrastive learning has achieved great successes in unsupervised training of representations. It trains an encoder by distinguishing positive samples from negative ones given query anchors. These…

计算机视觉与模式识别 · 计算机科学 2022-03-29 Xiao Wang , Yuhang Huang , Dan Zeng , Guo-Jun Qi

Unpaired Image-to-image Translation is a new rising and challenging vision problem that aims to learn a mapping between unaligned image pairs in diverse domains. Recent advances in this field like MUNIT and DRIT mainly focus on…

计算机视觉与模式识别 · 计算机科学 2019-05-07 Zhiqiang Shen , Mingyang Huang , Jianping Shi , Xiangyang Xue , Thomas Huang

Recently, deep neural networks have significant progress and successful application in various fields, but they are found vulnerable to attack instances, e.g., adversarial examples. State-of-art attack methods can generate attack images by…

机器学习 · 计算机科学 2019-03-19 Ping Yu , Kaitao Song , Jianfeng Lu

We present a novel framework for exemplar based image translation. Recent advanced methods for this task mainly focus on establishing cross-domain semantic correspondence, which sequentially dominates image generation in the manner of local…

计算机视觉与模式识别 · 计算机科学 2023-03-31 Chang Jiang , Fei Gao , Biao Ma , Yuhao Lin , Nannan Wang , Gang Xu

Recently, contrastive learning has been shown to be effective in improving pre-trained language models (PLM) to derive high-quality sentence representations. It aims to pull close positive examples to enhance the alignment while push apart…

计算与语言 · 计算机科学 2022-05-03 Kun Zhou , Beichen Zhang , Wayne Xin Zhao , Ji-Rong Wen

Neural networks have proven their capabilities by outperforming many other approaches on regression or classification tasks on various kinds of data. Other astonishing results have been achieved using neural nets as data generators,…

计算机视觉与模式识别 · 计算机科学 2018-10-16 Andrej Junginger , Markus Hanselmann , Thilo Strauss , Sebastian Boblest , Jens Buchner , Holger Ulmer

Neural networks are prone to learning shortcuts -- they often model simple correlations, ignoring more complex ones that potentially generalize better. Prior works on image classification show that instead of learning a connection to object…

机器学习 · 计算机科学 2021-01-18 Axel Sauer , Andreas Geiger

Adversarial examples have been demonstrated to threaten many computer vision tasks including object detection. However, the existing attacking methods for object detection have two limitations: poor transferability, which denotes that the…

计算机视觉与模式识别 · 计算机科学 2019-05-14 Xingxing Wei , Siyuan Liang , Ning Chen , Xiaochun Cao

Neural machine translation systems typically are trained on curated corpora and break when faced with non-standard orthography or punctuation. Resilience to spelling mistakes and typos, however, is crucial as machine translation systems are…

计算与语言 · 计算机科学 2020-09-15 Toms Bergmanis , Artūrs Stafanovičs , Mārcis Pinnis

Decoding from the output distributions of large language models to produce high-quality text is a complex challenge in language modeling. Various approaches, such as beam search, sampling with temperature, $k-$sampling, nucleus…

计算与语言 · 计算机科学 2024-10-22 Esteban Garces Arias , Julian Rodemann , Meimingwei Li , Christian Heumann , Matthias Aßenmacher

This paper investigates negative sampling for contrastive learning in the context of audio-text retrieval. The strategy for negative sampling refers to selecting negatives (either audio clips or textual descriptions) from a pool of…

音频与语音处理 · 电气工程与系统科学 2023-02-20 Huang Xie , Okko Räsänen , Tuomas Virtanen

Many image-to-image translation problems are ambiguous, as a single input image may correspond to multiple possible outputs. In this work, we aim to model a \emph{distribution} of possible outputs in a conditional generative modeling…

计算机视觉与模式识别 · 计算机科学 2018-10-25 Jun-Yan Zhu , Richard Zhang , Deepak Pathak , Trevor Darrell , Alexei A. Efros , Oliver Wang , Eli Shechtman

Despite the substantial progress in recent years, the image captioning techniques are still far from being perfect.Sentences produced by existing methods, e.g. those based on RNNs, are often overly rigid and lacking in variability. This…

计算机视觉与模式识别 · 计算机科学 2017-08-14 Bo Dai , Sanja Fidler , Raquel Urtasun , Dahua Lin

Self-supervised learning has recently begun to rival supervised learning on computer vision tasks. Many of the recent approaches have been based on contrastive instance discrimination (CID), in which the network is trained to recognize two…

计算机视觉与模式识别 · 计算机科学 2020-10-27 Tiffany Tianhui Cai , Jonathan Frankle , David J. Schwab , Ari S. Morcos

Image-to-image translation models have shown remarkable ability on transferring images among different domains. Most of existing work follows the setting that the source domain and target domain keep the same at training and inference…

计算机视觉与模式识别 · 计算机科学 2021-07-21 Jianxin Lin , Yingce Xia , Sen Liu , Shuqin Zhao , Zhibo Chen

In the last few years, the artifact patterns in fake images synthesized by different generative models have been inconsistent, leading to the failure of previous research that relied on spotting subtle differences between real and fake. In…

计算机视觉与模式识别 · 计算机科学 2025-03-04 Ziyou Liang , Weifeng Liu , Run Wang , Mengjie Wu , Boheng Li , Yuyang Zhang , Lina Wang , Xinyi Yang

Non-autoregressive Transformer is a promising text generation model. However, current non-autoregressive models still fall behind their autoregressive counterparts in translation quality. We attribute this accuracy gap to the lack of…

计算与语言 · 计算机科学 2021-03-23 Yu Bao , Shujian Huang , Tong Xiao , Dongqi Wang , Xinyu Dai , Jiajun Chen