Search Results for author: Jiamou Liu

Found 30 papers, 11 papers with code

STF: Spatial Temporal Fusion for Trajectory Prediction

1 code implementation29 Nov 2023 Pengqian Han, Partha Roop, Jiamou Liu, Tianzhe Bao, Yifei Wang

The main reason is that the trajectory is a kind of complex data, including spatial and temporal information, which is crucial for accurate prediction.

Graph Attention Trajectory Prediction

Zero-knowledge Proof Meets Machine Learning in Verifiability: A Survey

no code implementations23 Oct 2023 Zhibo Xing, Zijian Zhang, Jiamou Liu, Ziang Zhang, Meng Li, Liehuang Zhu, Giovanni Russello

However, in practice, due to various challenges such as limited computational resources and data privacy concerns, users in need of models often cannot train machine learning models locally.

Federated Learning

CSG: Curriculum Representation Learning for Signed Graph

no code implementations17 Oct 2023 Zeyu Zhang, Jiamou Liu, Kaiqi Zhao, Yifei Wang, Pengqian Han, Xianda Zheng, Qiqi Wang, Zijian Zhang

Signed graphs are valuable for modeling complex relationships with positive and negative connections, and Signed Graph Neural Networks (SGNNs) have become crucial tools for their analysis.

Link Sign Prediction Representation Learning

SGA: A Graph Augmentation Method for Signed Graph Neural Networks

no code implementations15 Oct 2023 Zeyu Zhang, Shuyan Wan, Sijie Wang, Xianda Zheng, Xinrui Zhang, Kaiqi Zhao, Jiamou Liu, Dong Hao

Signed Graph Neural Networks (SGNNs) are vital for analyzing complex patterns in real-world signed graphs containing positive and negative links.

Data Augmentation Graph Representation Learning +1

Exploring Iterative Enhancement for Improving Learnersourced Multiple-Choice Question Explanations with Large Language Models

1 code implementation19 Sep 2023 Qiming Bao, Juho Leinonen, Alex Yuxuan Peng, Wanjun Zhong, Gaël Gendron, Timothy Pistotti, Alice Huang, Paul Denny, Michael Witbrock, Jiamou Liu

When learnersourcing multiple-choice questions, creating explanations for the solution of a question is a crucial step; it helps other students understand the solution and promotes a deeper understanding of related concepts.

Explanation Generation Language Modelling +2

A Survey of Data Pricing for Data Marketplaces

no code implementations7 Mar 2023 Mengxiao Zhang, Fernando Beltran, Jiamou Liu

Data pricing, as a key function of a data marketplace, demands quantifying the monetary value of data.

GETNext: Trajectory Flow Map Enhanced Transformer for Next POI Recommendation

1 code implementation3 Mar 2023 Song Yang, Jiamou Liu, Kaiqi Zhao

Instead, we propose a user-agnostic global trajectory flow map and a novel Graph Enhanced Transformer model (GETNext) to better exploit the extensive collaborative signals for a more accurate next POI prediction, and alleviate the cold start problem in the meantime.

Learning Density-Based Correlated Equilibria for Markov Games

no code implementations16 Feb 2023 Libo Zhang, Yang Chen, Toru Takisaka, Bakh Khoussainov, Michael Witbrock, Jiamou Liu

In real-world multi-agent systems, in addition to being in an equilibrium, agents' policies are often expected to meet requirements with respect to safety, and fairness.

Fairness

USER: Unsupervised Structural Entropy-based Robust Graph Neural Network

1 code implementation12 Feb 2023 Yifei Wang, Yupan Wang, Zeyu Zhang, Song Yang, Kaiqi Zhao, Jiamou Liu

To this end, we propose USER, an unsupervised robust version of graph neural networks that is based on structural entropy.

Link Prediction Node Clustering

MSDC: Exploiting Multi-State Power Consumption in Non-intrusive Load Monitoring based on A Dual-CNN Model

no code implementations11 Feb 2023 Jialing He, Jiamou Liu, Zijian Zhang, Yang Chen, Yiwei Liu, Bakh Khoussainov, Liehuang Zhu

Non-intrusive load monitoring (NILM) aims to decompose aggregated electrical usage signal into appliance-specific power consumption and it amounts to a classical example of blind source separation tasks.

blind source separation Non-Intrusive Load Monitoring

Constrained Few-Shot Learning: Human-Like Low Sample Complexity Learning and Non-Episodic Text Classification

no code implementations17 Aug 2022 Jaron Mar, Jiamou Liu

Few-shot learning (FSL) is an emergent paradigm of learning that attempts to learn to reason with low sample complexity to mimic the way humans learn, generalise and extrapolate from only a few seen examples.

Few-Shot Learning text-classification +1

Multi-Step Deductive Reasoning Over Natural Language: An Empirical Study on Out-of-Distribution Generalisation

1 code implementation28 Jul 2022 Qiming Bao, Alex Yuxuan Peng, Tim Hartill, Neset Tan, Zhenyun Deng, Michael Witbrock, Jiamou Liu

In our model, reasoning is performed using an iterative memory neural network based on RNN with a gated attention mechanism.

From Cognitive to Computational Modeling: Text-based Risky Decision-Making Guided by Fuzzy Trace Theory

no code implementations Findings (NAACL) 2022 Jaron Mar, Jiamou Liu

Understanding, modelling and predicting human risky decision-making is challenging due to intrinsic individual differences and irrationality.

Decision Making

DeepQR: Neural-based Quality Ratings for Learnersourced Multiple-Choice Questions

no code implementations19 Nov 2021 Lin Ni, Qiming Bao, Xiaoxuan Li, Qianqian Qi, Paul Denny, Jim Warren, Michael Witbrock, Jiamou Liu

We propose DeepQR, a novel neural-network model for AQQR that is trained using multiple-choice-question (MCQ) datasets collected from PeerWise, a widely-used learnersourcing platform.

Contrastive Learning Multiple-choice

GACAN: Graph Attention-Convolution-Attention Networks for Traffic Forecasting Based on Multi-granularity Time Series

no code implementations27 Oct 2021 Sikai Zhang, Hong Zheng, Hongyi Su, Bo Yan, Jiamou Liu, Song Yang

The main novelty of the model is the integration of time series of four different time granularities: the original time series, together with hourly, daily, and weekly time series.

Graph Attention Time Series +1

Space Meets Time: Local Spacetime Neural Network For Traffic Flow Forecasting

no code implementations11 Sep 2021 Song Yang, Jiamou Liu, Kaiqi Zhao

We argue that such correlations are universal and play a pivotal role in traffic flow.

Traffic Prediction

Generating Relevant and Coherent Dialogue Responses using Self-separated Conditional Variational AutoEncoders

no code implementations ACL 2021 Bin Sun, Shaoxiong Feng, Yiwei Li, Jiamou Liu, Kan Li

Conditional Variational AutoEncoder (CVAE) effectively increases the diversity and informativeness of responses in open-ended dialogue generation tasks through enriching the context vector with sampled latent variables.

Dialogue Generation Informativeness

THINK: A Novel Conversation Model for Generating Grammatically Correct and Coherent Responses

no code implementations28 May 2021 Bin Sun, Shaoxiong Feng, Yiwei Li, Jiamou Liu, Kan Li

In this work, we proposed a conversation model named "THINK" (Teamwork generation Hover around Impressive Noticeable Keywords) to make the decoder more complicated and avoid generating duplicated and self-contradicting responses.

Informativeness

Adversarial Inverse Reinforcement Learning for Mean Field Games

no code implementations29 Apr 2021 Yang Chen, Libo Zhang, Jiamou Liu, Michael Witbrock

However, existing IRL methods for MFGs are powerless to reason about uncertainties in demonstrated behaviours of individual agents.

reinforcement-learning Reinforcement Learning (RL)

REM: From Structural Entropy to Community Structure Deception

1 code implementation NeurIPS 2019 Yiwei Liu, Jiamou Liu, Zijian Zhang, Liehuang Zhu, Angsheng Li

This paper focuses on the privacy risks of disclosing the community structure in an online social network.

Community Detection

Finding Answers from the Word of God: Domain Adaptation for Neural Networks in Biblical Question Answering

no code implementations26 Oct 2018 Helen Jiahe Zhao, Jiamou Liu

Furthermore, we also measure the model accuracies with different answer context lengths and different Bible translations.

Domain Adaptation Question Answering +3

From the Periphery to the Center: Information Brokerage in an Evolving Network

no code implementations2 May 2018 Bo Yan, Yiping Liu, Jiamou Liu, Yijin Cai, Hongyi Su, Hong Zheng

We model integration as the interplay between the newcomer and the dynamics network and capture information brokerage using a process of relationship building.

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