Search Results for author: Junjun Pan

Found 8 papers, 2 papers with code

PREM: A Simple Yet Effective Approach for Node-Level Graph Anomaly Detection

1 code implementation18 Oct 2023 Junjun Pan, Yixin Liu, Yizhen Zheng, Shirui Pan

Comprising two modules - a pre-processing module and an ego-neighbor matching module - PREM eliminates the necessity for message-passing propagation during training, and employs a simple contrastive loss, leading to considerable reductions in training time and memory usage.

Contrastive Learning Graph Anomaly Detection

Separable Quaternion Matrix Factorization for Polarization Images

no code implementations28 Jul 2022 Junjun Pan, Michael K. Ng

To determine the source factor matrix in quaternion space, we propose a heuristic algorithm called quaternion successive projection algorithm (QSPA) inspired by the successive projection algorithm.

Diverse Dance Synthesis via Keyframes with Transformer Controllers

1 code implementation13 Jul 2022 Junjun Pan, Siyuan Wang, Junxuan Bai, Ju Dai

The video and qualitative experimental results demonstrate that the complex motion sequences generated by our algorithm can achieve diverse and smooth motion transitions between keyframes, even for long-term synthesis.

Motion Synthesis

Co-Separable Nonnegative Matrix Factorization

no code implementations2 Sep 2021 Junjun Pan, Michael K. Ng

It aims to find a low rank approximation for nonnegative data M by a product of two nonnegative matrices W and H. In general, NMF is NP-hard to solve while it can be solved efficiently under separability assumption, which requires the columns of factor matrix are equal to columns of the input matrix.

Nonnegative Low Rank Tensor Approximation and its Application to Multi-dimensional Images

no code implementations28 Jul 2020 Tai-Xiang Jiang, Michael K. Ng, Junjun Pan, Guangjing Song

The main aim of this paper is to develop a new algorithm for computing nonnegative low rank tensor approximation for nonnegative tensors that arise in many multi-dimensional imaging applications.

Orthogonal Nonnegative Tucker Decomposition

no code implementations21 Oct 2019 Junjun Pan, Michael K. Ng, Ye Liu, Xiongjun Zhang, Hong Yan

In this paper, we study the nonnegative tensor data and propose an orthogonal nonnegative Tucker decomposition (ONTD).

Face Recognition Hyperspectral Unmixing

Generalized Separable Nonnegative Matrix Factorization

no code implementations30 May 2019 Junjun Pan, Nicolas Gillis

Given a data matrix $M$ and a factorization rank $r$, NMF looks for a nonnegative matrix $W$ with $r$ columns and a nonnegative matrix $H$ with $r$ rows such that $M \approx WH$.

Audio Source Separation Hyperspectral Unmixing

Tucker Decomposition Network: Expressive Power and Comparison

no code implementations23 May 2019 Ye Liu, Junjun Pan, Michael Ng

Deep neural networks have achieved a great success in solving many machine learning and computer vision problems.

General Classification Image Classification +1

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