1 citations · 2 across the 15 of their papers we have counts for
4 papers · 1 filter
Unveil Sleep Spindles with Concentration of Frequency and Time
Riki Shimizu, Hau-Tieng Wu
Objective: Sleep spindles contain crucial brain dynamics information. We introduce the novel non-linear time-frequency analysis tool 'Concentration of Frequency and Time' (ConceFT)…
Enhancing Missing Data Imputation of Non-stationary Signals with Harmonic Decomposition
Joaquin Ruiz, Hau-tieng Wu, Marcelo A. Colominas
Dealing with time series with missing values, including those afflicted by low quality or over-saturation, presents a significant signal processing challenge. The task of recoverin…
Ridge detection for nonstationary multicomponent signals with time-varying wave-shape functions and its applications
Yan-Wei Su, Gi-Ren Liu, Yuan-Chung Sheu +1
We introduce a novel ridge detection algorithm for time-frequency (TF) analysis, particularly tailored for intricate nonstationary time series encompassing multiple non-sinusoidal…
Convergence of Hessian estimator from random samples on a manifold with boundary
Chih-Wei Chen, Hau-Tieng Wu
A common method for estimating the Hessian operator from random samples on a low-dimensional manifold involves locally fitting a quadratic polynomial. Although widely used, it is u…