Unified principal component analysis for sparse and dense functional data under spatial dependency

H Zhang, Y Li - Journal of Business & Economic Statistics, 2022 - Taylor & Francis
We consider spatially dependent functional data collected under a geostatistics setting,
where locations are sampled from a spatial point process. The functional response is the …

Modeling and Regionalization of China's PM2.5 Using Spatial-Functional Mixture Models

D Liang, H Zhang, X Chang… - Journal of the American …, 2021 - Taylor & Francis
Severe air pollution affects billions of people around the world, particularly in develo**
countries such as China. Effective emission control policies rely primarily on a proper …

Scanner: Simultaneously temporal trend and spatial cluster detection for spatial‐temporal data

X Wang, X Zhang - Environmetrics, 2024 - Wiley Online Library
Identifying the underlying trajectory pattern in the spatial‐temporal data analysis is a
fundamental but challenging task. In this paper, we study the problem of simultaneously …

Topics in functional data analysis and machine learning predictive inference

H Zhang - 2019 - search.proquest.com
This dissertation is composed of three research projects focused on functional data analysis
and machine learning predictive inference. The first project deals with the covariance …