no code implementations • 9 Jun 2023 • Zheng Zhai, Hengchao Chen, Zhigang Yao
The main result proves the inclusion relationship between ridges: $\cR(f\circ p)\subseteq \cR(p)$, provided that the transformation $f$ is strictly increasing and concave on the range of the function $p$.
no code implementations • 30 Sep 2019 • Zhigang Yao, Bingjie Li, Wee Chin Tan
Inspired by the relation between the eigenvalues of the Laplace-Beltrami operator and the geometry of a manifold, we aim to find a small set of points that preserve the geometry of the underlying manifold.
1 code implementation • 23 Sep 2019 • Zhigang Yao, Yuqing Xia
Numerical simulations are provided to validate our theoretical findings and demonstrate the advantages of our method over other relevant manifold fitting methods.
no code implementations • 21 Oct 2017 • Zhigang Yao, Zhenyue Zhang
We consider the classification problem and focus on nonlinear methods for classification on manifolds.
no code implementations • 21 Dec 2012 • Yingying Fan, Jiashun Jin, Zhigang Yao
We propose a two-stage classification method where we first select features by the method of Innovated Thresholding (IT), and then use the retained features and Fisher's LDA for classification.