Zikai Wei

2 accepted papers

2026

BAG: Benchmarking Anomaly Detection on Dynamic Graphs

Fengrui Hua, Yiyan Qi, Zikai Wei, Yuxing Tian, Chengjin Xu, Xiaojun Wu +2

AAAI 2026technical

Anomaly detection in dynamic graphs is a critical area of research that focuses on identifying abnormal components within evolving graph structures that deviate significantly from typical patterns. Despite advancements in traditional temporal pattern mining and deep learning techniques, a comprehens

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2023

HireVAE: An Online and Adaptive Factor Model Based on Hierarchical and Regime-Switch VAE

Zikai Wei, Anyi Rao, Bo Dai, Dahua Lin

IJCAI 2023poster

Factor model is a fundamental investment tool in quantitative investment, which can be empowered by deep learning to become more flexible and efficient in practical complicated investing situations. However, it is still an open question to build a factor model that can conduct stock prediction in an…

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