1 code implementation • 28 Sep 2023 • Chunkai Zhang, Maohua Lyu, Huaijin Hao, Wensheng Gan, Philip S. Yu
For artificial intelligence, high-utility sequential rule mining (HUSRM) is a knowledge discovery method that can reveal the associations between events in the sequences.
1 code implementation • 29 Dec 2022 • Chunkai Zhang, Yuting Yang, Zilin Du, Wensheng Gan, Philip S. Yu
High-utility sequential pattern mining (HUSPM) has emerged as an important topic due to its wide application and considerable popularity.
no code implementations • 27 Sep 2022 • Chunkai Zhang, Maohua Lyu, Wensheng Gan, Philip S. Yu
TotalSR creates a utility table that can efficiently calculate antecedent support and a utility prefix sum list that can compute the remaining utility in O(1) time for a sequence.
no code implementations • 14 Oct 2020 • Chunkai Zhang, Wei Zuo, Xuan Wang
To minimize the reconstruction error of normal data and maximize this of anomaly data, we do not just ensure normal data to reconstruct well, but also try to make the reconstruction of anomaly data consistent with the distribution of normal data, then anomalies will get higher reconstruction errors.
1 code implementation • 3 Jul 2019 • Chunkai Zhang, Shaocong Li, Hongye Zhang, Yingyang Chen
In view of reconstruct ability of the model and the calculation of anomaly score, this paper proposes a time series anomaly detection method based on Variational AutoEncoder model(VAE) with re-Encoder and Latent Constraint network(VELC).
no code implementations • 28 Jun 2019 • Chunkai Zhang, Yingyang Chen, Ao Yin
Anomaly subsequence detection is to detect inconsistent data, which always contains important information, among time series.
no code implementations • 28 Jun 2019 • Chunkai Zhang, Yingyang Chen, Ao Yin, Zhen Qin, Xing Zhang, Keli Zhang, Zoe L. Jiang
In this paper, we propose two new approaches for time series that utilize approximate trend feature information.
1 code implementation • Knowledge-Based Systems 2017 • QiaoLiu, Xiaohuan Lu, Zhenyu He, Chunkai Zhang, WenSheng Chen
We observe that the features from the fully-connected layer are not suitable for thermal infrared tracking due to the lack of spatial information of the target, while the features from the convolution layers are.