Search Results for author: Siwei Liu

Found 7 papers, 1 papers with code

Revolutionizing Disease Diagnosis with simultaneous functional PET/MR and Deeply Integrated Brain Metabolic, Hemodynamic, and Perfusion Networks

no code implementations29 Mar 2024 Luoyu Wang, Yitian Tao, Qing Yang, Yan Liang, Siwei Liu, Hongcheng Shi, Dinggang Shen, Han Zhang

To fully exploit the inherent complex and nonlinear relation among modalities while producing fine-grained representations for uni-modal inference, we subsequently add a modal alignment module to line up a dominant modality (e. g., PET) with representations of auxiliary modalities (MR).

PASCL: Supervised Contrastive Learning with Perturbative Augmentation for Particle Decay Reconstruction

1 code implementation18 Feb 2024 Junjian Lu, Siwei Liu, Dmitrii Kobylianski, Etienne Dreyer, Eilam Gross, Shangsong Liang

In high-energy physics, particles produced in collision events decay in a format of a hierarchical tree structure, where only the final decay products can be observed using detectors.

Contrastive Learning

A Robbins--Monro Sequence That Can Exploit Prior Information For Faster Convergence

no code implementations6 Jan 2024 Siwei Liu, Ke Ma, Stephan M. Goetz

We propose a new method to improve the convergence speed of the Robbins-Monro algorithm by introducing prior information about the target point into the Robbins-Monro iteration.

A Social-aware Gaussian Pre-trained Model for Effective Cold-start Recommendation

no code implementations27 Nov 2023 Siwei Liu, Xi Wang, Craig Macdonald, Iadh Ounis

We propose a novel recommendation model, the Social-aware Gaussian Pre-trained model (SGP), which encodes the user social relations and interaction data at the pre-training stage in a Graph Neural Network (GNN).

Recommendation Systems

Graph Neural Pre-training for Enhancing Recommendations using Side Information

no code implementations8 Jul 2021 Zaiqiao Meng, Siwei Liu, Craig Macdonald, Iadh Ounis

For the GCN-P model, two single-relational graphs are constructed from all the users' and items' side information respectively, to pre-train entity representations by using the Graph Convolutional Networks.

Entity Embeddings Recommendation Systems

An optimized Capsule-LSTM model for facial expression recognition with video sequences

no code implementations27 May 2021 Siwei Liu, Yuanpeng Long, Gao Xu, Lijia Yang, Shimei Xu, Xiaoming Yao, Kunxian Shu

To overcome the limitations of convolutional neural network in the process of facial expression recognition, a facial expression recognition model Capsule-LSTM based on video frame sequence is proposed.

Facial Expression Recognition Facial Expression Recognition (FER)

BPLF: A Bi-Parallel Linear Flow Model for Facial Expression Generation from Emotion Set Images

no code implementations27 May 2021 Gao Xu, Yuanpeng Long, Siwei Liu, Lijia Yang, Shimei Xu, Xiaoming Yao, Kunxian Shu

In this paper, a bi-parallel linear flow model for facial emotion generation from emotion set images is constructed, and a series of improvements have been made in terms of the expression ability of the model and the convergence speed in training.

Facial expression generation

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