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From multivariate to functional data analysis: Fundamentals, recent developments, and emerging areas
Functional data analysis (FDA), which is a branch of statistics on modeling infinite
dimensional random vectors resided in functional spaces, has become a major research …
dimensional random vectors resided in functional spaces, has become a major research …
Simultaneous inference and uniform test for eigensystems of functional data
The asymptotically correct confidence interval (CI) and simultaneous confidence band (SCB)
of any individual eigenvalue and eigenfunction are constructed under dense functional data …
of any individual eigenvalue and eigenfunction are constructed under dense functional data …
STATISTICAL INFERENCE FOR FUNCTIONAL TIME SERIES
C Zhong, L Yang - Statistica Sinica, 2023 - JSTOR
We investigate statistical inference for functional time series by extending the classic
concept of an autocovariance function (ACF) to a functional ACF (FACF). We establish that …
concept of an autocovariance function (ACF) to a functional ACF (FACF). We establish that …
Inference for dependent error functional data with application to event-related potentials
Estimation and testing is studied for functional data with temporally dependent errors, an
interesting example of which is the event-related potential (ERP). B-spline estimators are …
interesting example of which is the event-related potential (ERP). B-spline estimators are …
From sparse to dense functional data: Phase transitions from a simultaneous inference perspective
We aim to develop simultaneous inference tools for the mean function of functional data from
sparse to dense. First, we derive a unified Gaussian approximation to construct …
sparse to dense. First, we derive a unified Gaussian approximation to construct …
Confidence surfaces for the mean of locally stationary functional time series
The problem of constructing a simultaneous confidence band for the mean function of a
locally stationary functional time series $\{X_ {i, n}(t)\} _ {i= 1,\ldots, n} $ is challenging as …
locally stationary functional time series $\{X_ {i, n}(t)\} _ {i= 1,\ldots, n} $ is challenging as …
Universal nonparametric kernel-type estimators for the mean and covariance functions of a stochastic process
YY Linke, IS Borisov - Theory of Probability & Its Applications, 2024 - SIAM
Let f_1(t),\dots,f_n(t) be independent copies of some as continuous stochastic process f(t),
t∈0,1, which are observed with noise. We consider the problem of nonparametric estimation …
t∈0,1, which are observed with noise. We consider the problem of nonparametric estimation …
Oracle-efficient global inference for variance function in nonparametric regression with missing covariates
L Cai, S Wang - Statistica Sinica, 2023 - JSTOR
We propose a new bias-corrected spline-kernel estimator and a smooth simultaneous
confidence band (SCB) as a global inference tool for the conditional variance function in a …
confidence band (SCB) as a global inference tool for the conditional variance function in a …
Statistical inference and goodness-of-fit test in functional data via error distribution function
C Zhong - Statistics and Computing, 2025 - Springer
A kernel distribution estimator (KDE) is proposed for the error distribution in the functional
data, which is computed from the residuals of the B-spline trajectories over all the …
data, which is computed from the residuals of the B-spline trajectories over all the …
Oracle-efficient estimation and global inferences for variance function of functional data
L Cai, S Wang - Journal of Statistical Planning and Inference, 2025 - Elsevier
A new two-step reconstruction-based moment estimator and an asymptotically correct
smooth simultaneous confidence band as a global inference tool are proposed for the …
smooth simultaneous confidence band as a global inference tool are proposed for the …