Search Results for author: Pei Wang

Found 69 papers, 19 papers with code

Acknowledgement Entity Recognition in CORD-19 Papers

1 code implementation EMNLP (sdp) 2020 Jian Wu, Pei Wang, Xin Wei, Sarah Rajtmajer, C. Lee Giles, Christopher Griffin

We built a supplementary database by linking CORD-19 papers with acknowledgement entities extracted by AckExtract including persons and organizations and find that only up to 50–60% of named entities are actually acknowledged.

Sentence

Mixed-Query Transformer: A Unified Image Segmentation Architecture

no code implementations6 Apr 2024 Pei Wang, Zhaowei Cai, Hao Yang, Ashwin Swaminathan, R. Manmatha, Stefano Soatto

Existing unified image segmentation models either employ a unified architecture across multiple tasks but use separate weights tailored to each dataset, or apply a single set of weights to multiple datasets but are limited to a single task.

Data Augmentation Image Segmentation +2

Beyond the Known: Investigating LLMs Performance on Out-of-Domain Intent Detection

no code implementations27 Feb 2024 Pei Wang, Keqing He, Yejie Wang, Xiaoshuai Song, Yutao Mou, Jingang Wang, Yunsen Xian, Xunliang Cai, Weiran Xu

Out-of-domain (OOD) intent detection aims to examine whether the user's query falls outside the predefined domain of the system, which is crucial for the proper functioning of task-oriented dialogue (TOD) systems.

Intent Detection Transfer Learning

You Only Need One Color Space: An Efficient Network for Low-light Image Enhancement

1 code implementation8 Feb 2024 Yixu Feng, Cheng Zhang, Pei Wang, Peng Wu, Qingsen Yan, Yanning Zhang

Further, we design a novel Color and Intensity Decoupling Network (CIDNet) with two branches dedicated to processing the decoupled image brightness and color in the HVI space.

Low-light Image Deblurring and Enhancement Low-Light Image Enhancement

APP: Adaptive Prototypical Pseudo-Labeling for Few-shot OOD Detection

no code implementations20 Oct 2023 Pei Wang, Keqing He, Yutao Mou, Xiaoshuai Song, Yanan Wu, Jingang Wang, Yunsen Xian, Xunliang Cai, Weiran Xu

Detecting out-of-domain (OOD) intents from user queries is essential for a task-oriented dialogue system.

Large Language Models Meet Open-World Intent Discovery and Recognition: An Evaluation of ChatGPT

1 code implementation16 Oct 2023 Xiaoshuai Song, Keqing He, Pei Wang, Guanting Dong, Yutao Mou, Jingang Wang, Yunsen Xian, Xunliang Cai, Weiran Xu

The tasks of out-of-domain (OOD) intent discovery and generalized intent discovery (GID) aim to extend a closed intent classifier to open-world intent sets, which is crucial to task-oriented dialogue (TOD) systems.

In-Context Learning Intent Discovery

Confidence Ranking for CTR Prediction

no code implementations28 Jun 2023 Jian Zhu, Congcong Liu, Pei Wang, Xiwei Zhao, Zhangang Lin, Jingping Shao

Model evolution and constant availability of data are two common phenomena in large-scale real-world machine learning applications, e. g. ads and recommendation systems.

Click-Through Rate Prediction Recommendation Systems

Decoupling Pseudo Label Disambiguation and Representation Learning for Generalized Intent Discovery

1 code implementation28 May 2023 Yutao Mou, Xiaoshuai Song, Keqing He, Chen Zeng, Pei Wang, Jingang Wang, Yunsen Xian, Weiran Xu

Previous methods suffer from a coupling of pseudo label disambiguation and representation learning, that is, the reliability of pseudo labels relies on representation learning, and representation learning is restricted by pseudo labels in turn.

Intent Discovery Pseudo Label +1

Learning from Multi-Perception Features for Real-Word Image Super-resolution

no code implementations26 May 2023 Axi Niu, Kang Zhang, Trung X. Pham, Pei Wang, Jinqiu Sun, In So Kweon, Yanning Zhang

Currently, there are two popular approaches for addressing real-world image super-resolution problems: degradation-estimation-based and blind-based methods.

Image Super-Resolution

GRAN: Ghost Residual Attention Network for Single Image Super Resolution

no code implementations28 Feb 2023 Axi Niu, Pei Wang, Yu Zhu, Jinqiu Sun, Qingsen Yan, Yanning Zhang

GRAB consists of the Ghost Module and Channel and Spatial Attention Module (CSAM) to alleviate the generation of redundant features.

Image Super-Resolution

Take a Prior from Other Tasks for Severe Blur Removal

no code implementations14 Feb 2023 Pei Wang, Danna Xue, Yu Zhu, Jinqiu Sun, Qingsen Yan, Sung-Eui Yoon, Yanning Zhang

For general scene deblurring, the feature space of the blurry image and corresponding sharp image under the high-level vision task is closer, which inspires us to rely on other tasks (e. g. classification) to learn a comprehensive prior in severe blur removal cases.

Deblurring Image Deblurring +1

Towards Professional Level Crowd Annotation of Expert Domain Data

no code implementations CVPR 2023 Pei Wang, Nuno Vasconcelos

A new approach, based on semi-supervised learning (SSL) and denoted as SSL with human filtering (SSL-HF) is proposed.

UniNL: Aligning Representation Learning with Scoring Function for OOD Detection via Unified Neighborhood Learning

1 code implementation19 Oct 2022 Yutao Mou, Pei Wang, Keqing He, Yanan Wu, Jingang Wang, Wei Wu, Weiran Xu

Specifically, we design a K-nearest neighbor contrastive learning (KNCL) objective for representation learning and introduce a KNN-based scoring function for OOD detection.

Contrastive Learning Out of Distribution (OOD) Detection +2

Watch the Neighbors: A Unified K-Nearest Neighbor Contrastive Learning Framework for OOD Intent Discovery

1 code implementation17 Oct 2022 Yutao Mou, Keqing He, Pei Wang, Yanan Wu, Jingang Wang, Wei Wu, Weiran Xu

For OOD clustering stage, we propose a KCC method to form compact clusters by mining true hard negative samples, which bridges the gap between clustering and representation learning.

Clustering Contrastive Learning +3

Disentangling Confidence Score Distribution for Out-of-Domain Intent Detection with Energy-Based Learning

no code implementations17 Oct 2022 Yanan Wu, Zhiyuan Zeng, Keqing He, Yutao Mou, Pei Wang, Yuanmeng Yan, Weiran Xu

In this paper, we propose a simple but strong energy-based score function to detect OOD where the energy scores of OOD samples are higher than IND samples.

Intent Detection Out of Distribution (OOD) Detection

Semi-Supervised Knowledge-Grounded Pre-training for Task-Oriented Dialog Systems

1 code implementation17 Oct 2022 Weihao Zeng, Keqing He, Zechen Wang, Dayuan Fu, Guanting Dong, Ruotong Geng, Pei Wang, Jingang Wang, Chaobo Sun, Wei Wu, Weiran Xu

Recent advances in neural approaches greatly improve task-oriented dialogue (TOD) systems which assist users to accomplish their goals.

Distribution Calibration for Out-of-Domain Detection with Bayesian Approximation

1 code implementation COLING 2022 Yanan Wu, Zhiyuan Zeng, Keqing He, Yutao Mou, Pei Wang, Weiran Xu

Out-of-Domain (OOD) detection is a key component in a task-oriented dialog system, which aims to identify whether a query falls outside the predefined supported intent set.

Out of Distribution (OOD) Detection

SlimSeg: Slimmable Semantic Segmentation with Boundary Supervision

no code implementations13 Jul 2022 Danna Xue, Fei Yang, Pei Wang, Luis Herranz, Jinqiu Sun, Yu Zhu, Yanning Zhang

Accurate semantic segmentation models typically require significant computational resources, inhibiting their use in practical applications.

Knowledge Distillation Segmentation +1

PCDF: A Parallel-Computing Distributed Framework for Sponsored Search Advertising Serving

no code implementations26 Jun 2022 Han Xu, Hao Qi, Kunyao Wang, Pei Wang, Guowei Zhang, Congcong Liu, Junsheng Jin, Xiwei Zhao, Zhangang Lin, Jinghe Hu, Jingping Shao

In this work, we propose a novel framework PCDF(Parallel-Computing Distributed Framework), allowing to split the computation cost into three parts and to deploy them in the pre-module in parallel with the retrieval stage, the middle-module for ranking ads, and the post-module for re-ranking ads with external items.

Click-Through Rate Prediction Re-Ranking +1

Evolution of beliefs in social networks

no code implementations26 May 2022 Pushpi Paranamana, Pei Wang, Patrick Shafto

Evolution of beliefs of a society are a product of interactions between people (horizontal transmission) in the society over generations (vertical transmission).

IA-GCN: Interactive Graph Convolutional Network for Recommendation

no code implementations8 Apr 2022 Yinan Zhang, Pei Wang, Xiwei Zhao, Hao Qi, Jie He, Junsheng Jin, Changping Peng, Zhangang Lin, Jingping Shao

In this work, we address this problem by building bilateral interactive guidance between each user-item pair and proposing a new model named IA-GCN (short for InterActive GCN).

Collaborative Filtering Recommendation Systems

Omni-DETR: Omni-Supervised Object Detection with Transformers

1 code implementation CVPR 2022 Pei Wang, Zhaowei Cai, Hao Yang, Gurumurthy Swaminathan, Nuno Vasconcelos, Bernt Schiele, Stefano Soatto

This is enabled by a unified architecture, Omni-DETR, based on the recent progress on student-teacher framework and end-to-end transformer based object detection.

Object object-detection +2

Neurosymbolic hybrid approach to driver collision warning

no code implementations28 Mar 2022 Kyongsik Yun, Thomas Lu, Alexander Huyen, Patrick Hammer, Pei Wang

(2) A mediated hybrid recognition system in which a system is created by combining independent modules that detect each semantic feature.

Autonomous Driving Image Classification +4

Learning Distinctive Margin toward Active Domain Adaptation

1 code implementation CVPR 2022 Ming Xie, Yuxi Li, Yabiao Wang, Zekun Luo, Zhenye Gan, Zhongyi Sun, Mingmin Chi, Chengjie Wang, Pei Wang

Despite plenty of efforts focusing on improving the domain adaptation ability (DA) under unsupervised or few-shot semi-supervised settings, recently the solution of active learning started to attract more attention due to its suitability in transferring model in a more practical way with limited annotation resource on target data.

Active Learning Domain Adaptation

Discrete Probabilistic Inverse Optimal Transport

no code implementations17 Dec 2021 Wei-Ting Chiu, Pei Wang, Patrick Shafto

Optimal transport (OT) formalizes the problem of finding an optimal coupling between probability measures given a cost matrix.

Neurosymbolic Systems of Perception & Cognition: The Role of Attention

no code implementations2 Dec 2021 Hugo Latapie, Ozkan Kilic, Kristinn R. Thorisson, Pei Wang, Patrick Hammer

A cognitive architecture aimed at cumulative learning must provide the necessary information and control structures to allow agents to learn incrementally and autonomously from their experience.

Dynamic Parameterized Network for CTR Prediction

no code implementations9 Nov 2021 Jian Zhu, Congcong Liu, Pei Wang, Xiwei Zhao, Guangpeng Chen, Junsheng Jin, Changping Peng, Zhangang Lin, Jingping Shao

Learning to capture feature relations effectively and efficiently is essential in click-through rate (CTR) prediction of modern recommendation systems.

Click-Through Rate Prediction Recommendation Systems

DeepAg: Deep Learning Approach for Measuring the Effects of Outlier Events on Agricultural Production and Policy

no code implementations22 Oct 2021 Sai Gurrapu, Feras A. Batarseh, Pei Wang, Md Nazmul Kabir Sikder, Nitish Gorentala, Gopinath Munisamy

Quantitative metrics that measure the global economy's equilibrium have strong and interdependent relationships with the agricultural supply chain and international trade flows.

Econometrics

Fast tree skeleton extraction using voxel thinning based on tree point cloud

no code implementations18 Oct 2021 Jingqian Sun, Pei Wang, Ronghao Li, Mei Zhou

In this paper, an automatic and fast tree skeleton extraction method (FTSEM) based on voxel thinning is proposed.

SDTP: Semantic-aware Decoupled Transformer Pyramid for Dense Image Prediction

no code implementations18 Sep 2021 Zekun Li, Yufan Liu, Bing Li, Weiming Hu, Kebin Wu, Pei Wang

CDI builds the global attention and interaction among different levels in decoupled space which also solves the problem of heavy computation.

Wood-leaf classification of tree point cloud based on intensity and geometrical information

no code implementations2 Aug 2021 Jingqian Sun, Pei Wang, Zhiyong Gao, Zichu Liu, Yaxin Li, Xiaozheng Gan

Tree point cloud was classified into wood points and leaf points by using intensity threshold, neighborhood density and voxelization successively.

Classification

Gradient-Based Algorithms for Machine Teaching

no code implementations CVPR 2021 Pei Wang, Kabir Nagrecha, Nuno Vasconcelos

This is formulated as a problem of functional optimization where, at each teaching iteration, the teacher seeks to align the steepest descent directions of the risk of (1) the teaching set and (2) entire example population.

BIG-bench Machine Learning

Lightweight Cross-Lingual Sentence Representation Learning

1 code implementation ACL 2021 Zhuoyuan Mao, Prakhar Gupta, Pei Wang, Chenhui Chu, Martin Jaggi, Sadao Kurohashi

Large-scale models for learning fixed-dimensional cross-lingual sentence representations like LASER (Artetxe and Schwenk, 2019b) lead to significant improvement in performance on downstream tasks.

Contrastive Learning Document Classification +4

IMAGINE: Image Synthesis by Image-Guided Model Inversion

no code implementations CVPR 2021 Pei Wang, Yijun Li, Krishna Kumar Singh, Jingwan Lu, Nuno Vasconcelos

We introduce an inversion based method, denoted as IMAge-Guided model INvErsion (IMAGINE), to generate high-quality and diverse images from only a single training sample.

Image Generation Specificity

Rethinking and Improving the Robustness of Image Style Transfer

1 code implementation CVPR 2021 Pei Wang, Yijun Li, Nuno Vasconcelos

Extensive research in neural style transfer methods has shown that the correlation between features extracted by a pre-trained VGG network has a remarkable ability to capture the visual style of an image.

Style Transfer

Dynamic Transfer for Multi-Source Domain Adaptation

1 code implementation CVPR 2021 Yunsheng Li, Lu Yuan, Yinpeng Chen, Pei Wang, Nuno Vasconcelos

However, such a static model is difficult to handle conflicts across multiple domains, and suffers from a performance degradation in both source domains and target domain.

Domain Adaptation

The first evidence for three-dimensional spin-velocity alignment in pulsars

no code implementations2 Mar 2021 Jumei Yao, Weiwei Zhu, Richard N. Manchester, William A. Coles, Di Li, Na Wang, Michael Kramer, Daniel R. Stinebring, Yi Feng, Wenming Yan, Chenchen Miao, Mao Yuan, Pei Wang, Jiguang Lu

Observations have shown a strong tendency for alignment of the pulsar space velocity and spin axis in young pulsars but, up to now, these comparisons have been restricted to two dimensions.

Astrophysics of Galaxies

Efficient Discretizations of Optimal Transport

no code implementations16 Feb 2021 Junqi Wang, Pei Wang, Patrick Shafto

Obtaining solutions to Optimal Transportation (OT) problems is typically intractable when the marginal spaces are continuous.

Distributionally-Constrained Policy Optimization via Unbalanced Optimal Transport

no code implementations15 Feb 2021 Arash Givchi, Pei Wang, Junqi Wang, Patrick Shafto

We consider constrained policy optimization in Reinforcement Learning, where the constraints are in form of marginals on state visitations and global action executions.

reinforcement-learning Reinforcement Learning (RL)

Non-uniform Motion Deblurring with Blurry Component Divided Guidance

no code implementations15 Jan 2021 Pei Wang, Wei Sun, Qingsen Yan, Axi Niu, Rui Li, Yu Zhu, Jinqiu Sun, Yanning Zhang

To tackle the above problems, we present a deep two-branch network to deal with blurry images via a component divided module, which divides an image into two components based on the representation of blurry degree.

Blind Image Deblurring Image Deblurring +1

A Machine Teaching Framework for Scalable Recognition

no code implementations ICCV 2021 Pei Wang, Nuno Vasconcelos

Preliminary studies show that the accuracy of classifiers trained on the final dataset is a function of the accuracy of the student annotators.

counterfactual Self-Supervised Learning

Semantic-Guided Representation Enhancement for Self-supervised Monocular Trained Depth Estimation

no code implementations15 Dec 2020 Rui Li, Qing Mao, Pei Wang, Xiantuo He, Yu Zhu, Jinqiu Sun, Yanning Zhang

Based on this framework, we enhance the local feature representation by sampling and feeding the point-based features that locate on the semantic edges to an individual Semantic-guided Edge Enhancement module (SEEM), which is specifically designed for promoting depth estimation on the challenging semantic borders.

Depth Estimation Semantic Segmentation

Solving Long-tailed Recognition with Deep Realistic Taxonomic Classifier

1 code implementation ECCV 2020 Tz-Ying Wu, Pedro Morgado, Pei Wang, Chih-Hui Ho, Nuno Vasconcelos

Motivated by this, a deep realistic taxonomic classifier (Deep-RTC) is proposed as a new solution to the long-tail problem, combining realism with hierarchical predictions.

Estimating the Number of Infected Cases in COVID-19 Pandemic

no code implementations24 May 2020 Donghui Yan, Ying Xu, Pei Wang

We propose a structured approach for the estimation of the number of unreported cases, where we distinguish cases that arrive late in the reported numbers and those who had mild or no symptoms and thus were not captured by any medical system at all.

SCOUT: Self-aware Discriminant Counterfactual Explanations

2 code implementations CVPR 2020 Pei Wang, Nuno Vasconcelos

It is argued that self-awareness, namely the ability to produce classification confidence scores, is important for the computation of discriminant explanations, which seek to identify regions where it is easy to discriminate between prediction and counter class.

Attribute counterfactual

Automated classification of stems and leaves of potted plants based on point cloud data

no code implementations28 Feb 2020 Zichu Liu, Qing Zhang, Pei Wang, Zhen Li, Huiru Wang

A classification method was proposed to classify the leaves and stems of potted plants automatically based on the point cloud data of the plants, which is a nondestructive acquisition.

General Classification

Sequential Cooperative Bayesian Inference

no code implementations ICML 2020 Junqi Wang, Pei Wang, Patrick Shafto

We seek foundational theoretical results for cooperative inference by Bayesian agents through sequential data.

Bayesian Inference

Automatic marker-free registration of tree point-cloud data based on rotating projection

no code implementations30 Jan 2020 Xiuxian Xu, Pei Wang, Xiaozheng Gan, Ya-Xin Li, Li Zhang, Qing Zhang, Mei Zhou, Yinghui Zhao, Xinwei Li

In coarse registration, point clouds produced by each scan are projected onto a spherical surface to generate a series of two-dimensional (2D) images, which are used to estimate the initial positions of multiple scans.

Deliberative Explanations: visualizing network insecurities

1 code implementation NeurIPS 2019 Pei Wang, Nuno Nvasconcelos

Since insecurity detection requires quantifying the difficulty of network predictions, deliberative explanations combine ideas from the literatures on visual explanations and assessment of classification difficulty.

Attribute Object Recognition +1

Learning a manifold from a teacher's demonstrations

no code implementations10 Oct 2019 Pei Wang, Arash Givchi, Patrick Shafto

We consider the problem of learning a manifold from a teacher's demonstration.

Topological Data Analysis

A mathematical theory of cooperative communication

no code implementations NeurIPS 2020 Pei Wang, Junqi Wang, Pushpi Paranamana, Patrick Shafto

Cooperative communication plays a central role in theories of human cognition, language, development, culture, and human-robot interaction.

Cultural Vocal Bursts Intensity Prediction

Generalizing the theory of cooperative inference

no code implementations4 Oct 2018 Pei Wang, Pushpi Paranamana, Patrick Shafto

Cooperation information sharing is important to theories of human learning and has potential implications for machine learning.

BIG-bench Machine Learning

Towards Realistic Predictors

no code implementations ECCV 2018 Pei Wang, Nuno Vasconcelos

It is argued that this should be a predictor independent of the classifier itself, but tuned to it, and learned without explicit supervision, so as to learn from its mistakes.

Pulsar Candidate Identification with Artificial Intelligence Techniques

no code implementations27 Nov 2017 Ping Guo, Fuqing Duan, Pei Wang, Yao Yao, Qian Yin, Xin Xin

To address these problems, we proposed a framework which combines deep convolution generative adversarial network (DCGAN) with support vector machine (SVM) to deal with imbalance class problem and to improve pulsar identification accuracy.

Astronomy Generative Adversarial Network

3D Randomized Connection Network with Graph-based Label Inference

no code implementations11 Nov 2017 Siqi Bao, Pei Wang, Tony C. W. Mok, Albert C. S. Chung

In this paper, a novel 3D deep learning network is proposed for brain MR image segmentation with randomized connection, which can decrease the dependency between layers and increase the network capacity.

Image Segmentation Semantic Segmentation

Weighted Orthogonal Components Regression Analysis

no code implementations13 Sep 2017 Xiaogang Su, Yaa Wonkye, Pei Wang, Xiangrong Yin

In the multiple linear regression setting, we propose a general framework, termed weighted orthogonal components regression (WOCR), which encompasses many known methods as special cases, including ridge regression and principal components regression.

regression

Optimal Cooperative Inference

no code implementations24 May 2017 Scott Cheng-Hsin Yang, Yue Yu, Arash Givchi, Pei Wang, Wai Keen Vong, Patrick Shafto

Cooperative transmission of data fosters rapid accumulation of knowledge by efficiently combining experiences across learners.

BIG-bench Machine Learning

Translingual Obfuscation

no code implementations5 Jan 2016 Pei Wang, Shuai Wang, Jiang Ming, Yufei Jiang, Dinghao Wu

We introduce translingual obfuscation, a new software obfuscation scheme which makes programs obscure by "misusing" the unique features of certain programming languages.

Cryptography and Security Software Engineering

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