Search Results for author: Weifeng Lv

Found 20 papers, 12 papers with code

Regions are Who Walk Them: a Large Pre-trained Spatiotemporal Model Based on Human Mobility for Ubiquitous Urban Sensing

1 code implementation17 Nov 2023 Ruixing Zhang, Liangzhe Han, Leilei Sun, Yunqi Liu, Jibin Wang, Weifeng Lv

To tap into the rich information within population movement, based on the perspective that Regions Are Who walk them, we propose a large spatiotemporal model based on trajectories (RAW).

MIR2: Towards Provably Robust Multi-Agent Reinforcement Learning by Mutual Information Regularization

no code implementations15 Oct 2023 Simin Li, Ruixiao Xu, Jun Guo, Pu Feng, Jiakai Wang, Aishan Liu, Yaodong Yang, Xianglong Liu, Weifeng Lv

Existing max-min optimization techniques in robust MARL seek to enhance resilience by training agents against worst-case adversaries, but this becomes intractable as the number of agents grows, leading to exponentially increasing worst-case scenarios.

Multi-agent Reinforcement Learning Starcraft +1

Learning Joint 2D & 3D Diffusion Models for Complete Molecule Generation

2 code implementations21 May 2023 Han Huang, Leilei Sun, Bowen Du, Weifeng Lv

To capture the correlation between molecular graphs and geometries in the diffusion process, we develop a Diffusion Graph Transformer to parameterize the data prediction model that recovers the original data from noisy data.

3D Molecule Generation Drug Discovery +2

Conditional Diffusion Based on Discrete Graph Structures for Molecular Graph Generation

1 code implementation1 Jan 2023 Han Huang, Leilei Sun, Bowen Du, Weifeng Lv

To accomplish these goals, we propose a novel Conditional Diffusion model based on discrete Graph Structures (CDGS) for molecular graph generation.

Drug Discovery Graph Generation +2

Continuous-Time and Multi-Level Graph Representation Learning for Origin-Destination Demand Prediction

1 code implementation30 Jun 2022 Liangzhe Han, Xiaojian Ma, Leilei Sun, Bowen Du, Yanjie Fu, Weifeng Lv, Hui Xiong

Traffic demand forecasting by deep neural networks has attracted widespread interest in both academia and industry society.

Graph Representation Learning

Continuous-Time User Preference Modelling for Temporal Sets Prediction

1 code implementation12 Apr 2022 Le Yu, Zihang Liu, Leilei Sun, Bowen Du, Chuanren Liu, Weifeng Lv

Previous studies for temporal sets prediction mainly focus on the modelling of elements and implicitly represent each user's preference based on his/her interacted elements.

Collaborative Learning in General Graphs with Limited Memorization: Complexity, Learnability, and Reliability

no code implementations29 Jan 2022 Feng Li, Xuyang Yuan, Lina Wang, Huan Yang, Dongxiao Yu, Weifeng Lv, Xiuzhen Cheng

The efficacy of our proposed three-staged collaborative learning algorithm is finally verified by extensive experiments on both synthetic and real datasets.

Memorization

Heterogeneous Graph Representation Learning with Relation Awareness

1 code implementation24 May 2021 Le Yu, Leilei Sun, Bowen Du, Chuanren Liu, Weifeng Lv, Hui Xiong

Moreover, a semantic fusing module is presented to aggregate relation-aware node representations into a compact representation with the learned relation representations.

Graph Learning Graph Representation Learning +4

Hybrid Micro/Macro Level Convolution for Heterogeneous Graph Learning

1 code implementation29 Dec 2020 Le Yu, Leilei Sun, Bowen Du, Chuanren Liu, Weifeng Lv, Hui Xiong

Representation learning on heterogeneous graphs aims to obtain low-dimensional node representations that could preserve both node attributes and relation information.

Graph Learning Node Property Prediction +1

Predicting Temporal Sets with Deep Neural Networks

2 code implementations20 Jun 2020 Le Yu, Leilei Sun, Bowen Du, Chuanren Liu, Hui Xiong, Weifeng Lv

Given a sequence of sets, where each set contains an arbitrary number of elements, the problem of temporal sets prediction aims to predict the elements in the subsequent set.

Time Series Analysis

Impact of Temperature and Relative Humidity on the Transmission of COVID-19: A Modeling Study in China and the United States

no code implementations9 Mar 2020 Jingyuan Wang, Ke Tang, Kai Feng, Xin Li, Weifeng Lv, Kun Chen, Fei Wang

Primary outcome measures: Regression analysis of the impact of temperature and relative humidity on the effective reproductive number (R value).

regression

Multiway Attention Networks for Modeling Sentence Pairs

1 code implementation IJCAI 2018 Chuanqi Tan, Furu Wei, Wenhui Wang, Weifeng Lv, Ming Zhou

Modeling sentence pairs plays the vital role for judging the relationship between two sentences, such as paraphrase identification, natural language inference, and answer sentence selection.

Natural Language Inference Paraphrase Identification +1

S-Net: From Answer Extraction to Answer Generation for Machine Reading Comprehension

no code implementations15 Jun 2017 Chuanqi Tan, Furu Wei, Nan Yang, Bowen Du, Weifeng Lv, Ming Zhou

We build the answer extraction model with state-of-the-art neural networks for single passage reading comprehension, and propose an additional task of passage ranking to help answer extraction in multiple passages.

Answer Generation Machine Reading Comprehension +1

Entity Linking for Queries by Searching Wikipedia Sentences

no code implementations EMNLP 2017 Chuanqi Tan, Furu Wei, Pengjie Ren, Weifeng Lv, Ming Zhou

The key idea is to search sentences similar to a query from Wikipedia articles and directly use the human-annotated entities in the similar sentences as candidate entities for the query.

Entity Linking Word Embeddings

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