20 citations · 29 across the 4 of their papers we have counts for
4 papers
Partial Reduction and Cosmology at Defect Brane
Zhi Wang, Zekun Xu, Shuyan Zhou +1
Partial reduction is a Randall-Sundrum reduction for only part of the AdS region between finite tension brane and zero tension brane. This is interesting in AdS/BCFT where the AdS…
Latent-state models for precision medicine
Zekun Xu, Eric Laber, Ana-Maria Staicu +1
Observational longitudinal studies are a common means to study treatment efficacy and safety in chronic mental illness. In many such studies, treatment changes may be initiated by…
Hierarchical Continuous Time Hidden Markov Model, with Application in Zero-Inflated Accelerometer Data
Zekun Xu, Eric B. Laber, Ana-Maria Staicu
Wearable devices including accelerometers are increasingly being used to collect high-frequency human activity data in situ. There is tremendous potential to use such data to infor…
A Regularized Vector Autoregressive Hidden Semi-Markov Model, with Application to Multivariate Financial Data
Zekun Xu, Ye Liu
A regularized vector autoregressive hidden semi-Markov model is developed to analyze multivariate financial time series with switching data generating regimes. Furthermore, an augm…