Search Results for author: Weiwei Sun

Found 58 papers, 17 papers with code

Comparing Knowledge-Intensive and Data-Intensive Models for English Resource Semantic Parsing

no code implementations CL (ACL) 2021 Junjie Cao, Zi Lin, Weiwei Sun, Xiaojun Wan

Abstract In this work, we present a phenomenon-oriented comparative analysis of the two dominant approaches in English Resource Semantic (ERS) parsing: classic, knowledge-intensive and neural, data-intensive models.

Semantic Parsing

Contrastive Learning Reduces Hallucination in Conversations

no code implementations20 Dec 2022 Weiwei Sun, Zhengliang Shi, Shen Gao, Pengjie Ren, Maarten de Rijke, Zhaochun Ren

MixCL effectively reduces the hallucination of LMs in conversations and achieves the highest performance among LM-based dialogue agents in terms of relevancy and factuality.

Contrastive Learning

CAT: Learning to Collaborate Channel and Spatial Attention from Multi-Information Fusion

no code implementations13 Dec 2022 Zizhang Wu, Man Wang, Weiwei Sun, Yuchen Li, Tianhao Xu, Fan Wang, Keke Huang

Channel and spatial attention mechanism has proven to provide an evident performance boost of deep convolution neural networks (CNNs).

Image Classification Instance Segmentation +3

RNTrajRec: Road Network Enhanced Trajectory Recovery with Spatial-Temporal Transformer

1 code implementation23 Nov 2022 Yuqi Chen, Hanyuan Zhang, Weiwei Sun, Baihua Zheng

However, many real-life trajectories are collected with low sample rate due to energy concern or other constraints. We study the task of trajectory recovery in this paper as a means for increasing the sample rate of low sample trajectories.

Graph Generation Traffic Prediction

Towards General-Purpose Representation Learning of Polygonal Geometries

1 code implementation29 Sep 2022 Gengchen Mai, Chiyu Jiang, Weiwei Sun, Rui Zhu, Yao Xuan, Ling Cai, Krzysztof Janowicz, Stefano Ermon, Ni Lao

For the spatial domain approach, we propose ResNet1D, a 1D CNN-based polygon encoder, which uses circular padding to achieve loop origin invariance on simple polygons.

Representation Learning

Adaptive Structural Similarity Preserving for Unsupervised Cross Modal Hashing

no code implementations9 Jul 2022 Liang Li, Baihua Zheng, Weiwei Sun

We introduce structural semantic metrics based on graph adjacency relations during the semantic reconstruction and correlation mining stage and meanwhile align the structure semantics in the hash space with an asymmetric binary optimization process.

Association Management +1

TUSK: Task-Agnostic Unsupervised Keypoints

no code implementations16 Jun 2022 Yuhe Jin, Weiwei Sun, Jan Hosang, Eduard Trulls, Kwang Moo Yi

Existing unsupervised methods for keypoint learning rely heavily on the assumption that a specific keypoint type (e. g. elbow, digit, abstract geometric shape) appears only once in an image.

Object Discovery Unsupervised Keypoints

Multi-Agent Reinforcement Learning for Traffic Signal Control through Universal Communication Method

1 code implementation26 Apr 2022 Qize Jiang, Minhao Qin, Shengmin Shi, Weiwei Sun, Baihua Zheng

How to coordinate the communication among intersections effectively in real complex traffic scenarios with multi-intersection is challenging.

Multi-agent Reinforcement Learning reinforcement-learning +1

Metaphorical User Simulators for Evaluating Task-oriented Dialogue Systems

1 code implementation2 Apr 2022 Weiwei Sun, Shuyu Guo, Shuo Zhang, Pengjie Ren, Zhumin Chen, Maarten de Rijke, Zhaochun Ren

Employing existing user simulators to evaluate TDSs is challenging as user simulators are primarily designed to optimize dialogue policies for TDSs and have limited evaluation capabilities.

Task-Oriented Dialogue Systems

Universal Semantic Tagging for English and Mandarin Chinese

1 code implementation NAACL 2021 Wenxi Li, Yiyang Hou, Yajie Ye, Li Liang, Weiwei Sun

By means of the new annotations, we also evaluate a series of neural tagging models to gauge how successful semantic tagging can be: accuracies of 92. 7{\%} and 94. 6{\%} are obtained for Chinese and English respectively.

LiteDepthwiseNet: An Extreme Lightweight Network for Hyperspectral Image Classification

no code implementations15 Oct 2020 Benlei Cui, XueMei Dong, Qiaoqiao Zhan, Jiangtao Peng, Weiwei Sun

Based on 3D depthwise convolution, LiteDepthwiseNet can decompose standard convolution into depthwise convolution and pointwise convolution, which can achieve high classification performance with minimal parameters.

Classification General Classification +1

Multiscale Context-Aware Ensemble Deep KELM for Efficient Hyperspectral Image Classification

1 code implementation22 Sep 2020 Bobo Xi, Jiaojiao Li, Yunsong Li, Rui Song, Weiwei Sun, Qian Du.

Recently, multiscale spatial features have been widely utilized to improve the hyperspectral image (HSI) classification performance.

General Classification Hyperspectral Image Classification

Constructing a Family Tree of Ten Indo-European Languages with Delexicalized Cross-linguistic Transfer Patterns

no code implementations17 Jul 2020 Yuanyuan Zhao, Weiwei Sun, Xiaojun Wan

It is reasonable to hypothesize that the divergence patterns formulated by historical linguists and typologists reflect constraints on human languages, and are thus consistent with Second Language Acquisition (SLA) in a certain way.

Language Acquisition

Exact yet Efficient Graph Parsing, Bi-directional Locality and the Constructivist Hypothesis

no code implementations ACL 2020 Yajie Ye, Weiwei Sun

A key problem in processing graph-based meaning representations is graph parsing, i. e. computing all possible derivations of a given graph according to a (competence) grammar.

Parsing into Variable-in-situ Logico-Semantic Graphs

no code implementations ACL 2020 Yufei Chen, Weiwei Sun

We propose variable-in-situ logico-semantic graphs to bridge the gap between semantic graph and logical form parsing.

Vehicle Re-ID for Surround-view Camera System

no code implementations30 Jun 2020 Zizhang Wu, Man Wang, Lingxiao Yin, Weiwei Sun, Jason Wang, Huangbin Wu

The vehicle re-identification (ReID) plays a critical role in the perception system of autonomous driving, which attracts more and more attention in recent years.

Autonomous Driving Vehicle Re-Identification

PSDet: Efficient and Universal Parking Slot Detection

no code implementations12 May 2020 Zizhang Wu, Weiwei Sun, Man Wang, Xiaoquan Wang, Lizhu Ding, Fan Wang

\romannumeral2, Expert knowledge for parking slot detection is under-estimated.

DeepDualMapper: A Gated Fusion Network for Automatic Map Extraction using Aerial Images and Trajectories

no code implementations17 Feb 2020 Hao Wu, Hanyuan Zhang, Xin-Yu Zhang, Weiwei Sun, Baihua Zheng, Yuning Jiang

We propose a deep convolutional neural network called DeepDualMapper which fuses the aerial image and trajectory data in a more seamless manner to extract the digital map.

Peking at MRP 2019: Factorization- and Composition-Based Parsing for Elementary Dependency Structures

no code implementations CONLL 2019 Yufei Chen, Yajie Ye, Weiwei Sun

We design, implement and evaluate two semantic parsers, which represent factorization- and composition-based approaches respectively, for Elementary Dependency Structures (EDS) at the CoNLL 2019 Shared Task on Cross-Framework Meaning Representation Parsing.

Optimizing Through Learned Errors for Accurate Sports Field Registration

1 code implementation17 Sep 2019 Wei Jiang, Juan Camilo Gamboa Higuera, Baptiste Angles, Weiwei Sun, Mehrsan Javan, Kwang Moo Yi

We propose an optimization-based framework to register sports field templates onto broadcast videos.

A Comparative Analysis of Knowledge-Intensive and Data-Intensive Semantic Parsers

no code implementations4 Jul 2019 Junjie Cao, Zi Lin, Weiwei Sun, Xiaojun Wan

We present a phenomenon-oriented comparative analysis of the two dominant approaches in task-independent semantic parsing: classic, knowledge-intensive and neural, data-intensive models.

Semantic Parsing

Graph-Based Meaning Representations: Design and Processing

1 code implementation ACL 2019 Alex Koller, er, Stephan Oepen, Weiwei Sun

This tutorial is on representing and processing sentence meaning in the form of labeled directed graphs.

Parsing Chinese Sentences with Grammatical Relations

no code implementations CL 2019 Weiwei Sun, Yufei Chen, Xiaojun Wan, Meichun Liu

In this work, we propose to represent grammatical information using general directed dependency graphs.

Ineffectiveness of Dictionary Coding to Infer Predictability Limits of Human Mobility

no code implementations8 Oct 2018 Yunheng Han, Weiwei Sun, Baihua Zheng

Consequently, it is ineffective to infer predictability through dictionary coding algorithms.

Semantic Role Labeling for Learner Chinese: the Importance of Syntactic Parsing and L2-L1 Parallel Data

1 code implementation EMNLP 2018 Zi Lin, Yuguang Duan, Yuan-Yuan Zhao, Weiwei Sun, Xiaojun Wan

This paper studies semantic parsing for interlanguage (L2), taking semantic role labeling (SRL) as a case task and learner Chinese as a case language.

Semantic Parsing Semantic Role Labeling

Pre- and In-Parsing Models for Neural Empty Category Detection

no code implementations ACL 2018 Yufei Chen, Yuan-Yuan Zhao, Weiwei Sun, Xiaojun Wan

Motivated by the positive impact of empty category on syntactic parsing, we study neural models for pre- and in-parsing detection of empty category, which has not previously been investigated.

Dependency Parsing Structured Prediction

Accurate SHRG-Based Semantic Parsing

no code implementations ACL 2018 Yufei Chen, Weiwei Sun, Xiaojun Wan

We demonstrate that an SHRG-based parser can produce semantic graphs much more accurately than previously shown, by relating synchronous production rules to the syntacto-semantic composition process.

Semantic Composition Semantic Parsing

Language Generation via DAG Transduction

no code implementations ACL 2018 Yajie Ye, Weiwei Sun, Xiaojun Wan

This remarkable result demonstrates the feasibility of applying a DAG transducer to resolve NLG, as well as the effectiveness of our design.

Semantic Parsing Text Generation

Quasi-Second-Order Parsing for 1-Endpoint-Crossing, Pagenumber-2 Graphs

no code implementations EMNLP 2017 Junjie Cao, Sheng Huang, Weiwei Sun, Xiaojun Wan

We propose a new Maximum Subgraph algorithm for first-order parsing to 1-endpoint-crossing, pagenumber-2 graphs.

Dependency Parsing

The Covert Helps Parse the Overt

no code implementations CONLL 2017 Xun Zhang, Weiwei Sun, Xiaojun Wan

This paper is concerned with whether deep syntactic information can help surface parsing, with a particular focus on empty categories.

Dependency Parsing

Parsing for Grammatical Relations via Graph Merging

no code implementations CONLL 2017 Weiwei Sun, Yantao Du, Xiaojun Wan

This paper is concerned with building deep grammatical relation (GR) analysis using data-driven approach.

Semantic Dependency Parsing via Book Embedding

no code implementations ACL 2017 Weiwei Sun, Junjie Cao, Xiaojun Wan

We model a dependency graph as a book, a particular kind of topological space, for semantic dependency parsing.

Combinatorial Optimization Dependency Parsing +1

Data-driven, PCFG-based and Pseudo-PCFG-based Models for Chinese Dependency Parsing

no code implementations TACL 2013 Weiwei Sun, Xiaojun Wan

We present a comparative study of transition-, graph- and PCFG-based models aimed at illuminating more precisely the likely contribution of CFGs in improving Chinese dependency parsing accuracy, especially by combining heterogeneous models.

Chinese Dependency Parsing Dependency Parsing +1

Cannot find the paper you are looking for? You can Submit a new open access paper.