Search Results for author: Liheng Ma

Found 8 papers, 4 papers with code

Revealing Decurve Flows for Generalized Graph Propagation

no code implementations13 Feb 2024 Chen Lin, Liheng Ma, Yiyang Chen, Wanli Ouyang, Michael M. Bronstein, Philip H. S. Torr

\textbf{Secondly}, we propose the {\em Continuous Unified Ricci Curvature} (\textbf{CURC}), an extension of celebrated {\em Ollivier-Ricci Curvature} for directed and weighted graphs.

Graph Learning

Multi-resolution Time-Series Transformer for Long-term Forecasting

2 code implementations7 Nov 2023 Yitian Zhang, Liheng Ma, Soumyasundar Pal, Yingxue Zhang, Mark Coates

Recent architectures learn complex temporal patterns by segmenting a time-series into patches and using the patches as tokens.

Time Series Time Series Forecasting

Graph Inductive Biases in Transformers without Message Passing

1 code implementation27 May 2023 Liheng Ma, Chen Lin, Derek Lim, Adriana Romero-Soriano, Puneet K. Dokania, Mark Coates, Philip Torr, Ser-Nam Lim

Graph inductive biases are crucial for Graph Transformers, and previous works incorporate them using message-passing modules and/or positional encodings.

Graph Classification Graph Regression +2

RNN with Particle Flow for Probabilistic Spatio-temporal Forecasting

1 code implementation10 Jun 2021 Soumyasundar Pal, Liheng Ma, Yingxue Zhang, Mark Coates

Spatio-temporal forecasting has numerous applications in analyzing wireless, traffic, and financial networks.

Bayesian Inference Spatio-Temporal Forecasting +2

Graph Attention Networks with Positional Embeddings

no code implementations9 May 2021 Liheng Ma, Reihaneh Rabbany, Adriana Romero-Soriano

In this framework, the positional embeddings are learned by a model predictive of the graph context, plugged into an enhanced GAT architecture, which is able to leverage both the positional and content information of each node.

Graph Attention Node Classification +1

Knowledge-Enhanced Top-K Recommendation in Poincaré Ball

no code implementations13 Jan 2021 Chen Ma, Liheng Ma, Yingxue Zhang, Haolun Wu, Xue Liu, Mark Coates

To effectively make use of the knowledge graph, we propose a recommendation model in the hyperbolic space, which facilitates the learning of the hierarchical structure of knowledge graphs.

Knowledge Graphs Recommendation Systems

Probabilistic Metric Learning with Adaptive Margin for Top-K Recommendation

no code implementations13 Jan 2021 Chen Ma, Liheng Ma, Yingxue Zhang, Ruiming Tang, Xue Liu, Mark Coates

Personalized recommender systems are playing an increasingly important role as more content and services become available and users struggle to identify what might interest them.

Metric Learning Recommendation Systems

Memory Augmented Graph Neural Networks for Sequential Recommendation

1 code implementation26 Dec 2019 Chen Ma, Liheng Ma, Yingxue Zhang, Jianing Sun, Xue Liu, Mark Coates

In addition to the modeling of user interests, we employ a bilinear function to capture the co-occurrence patterns of related items.

Sequential Recommendation

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