Results 101 to 110 of about 3,827,469 (279)

Adaptive Estimation for Weakly Dependent Functional Times Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT We propose adaptive mean and autocovariance function estimators for stationary functional time series under 𝕃p−m‐approximability assumptions. These estimators are designed to adapt to the regularity of the curves and to accommodate both sparse and dense data designs.
Hassan Maissoro, Valentin Patilea, Myriam Vimond   +2 more
wiley   +1 more source

A Characterisation of Lipschitz Classes on Finite Dimensional Groups [PDF]

Proceedings of the American Mathematical Society, 1976
An analogue of a theorem of S. N. Bernstein is developed for certain metric locally compact abelian groups. This, together with a corresponding Jackson-type theorem, gives a characterisation in terms of their Fourier transforms of the Lipschitz functions defined on a compact abelian group with finite topological dimension.
openaire   +2 more sources

Density‐Valued ARMA Models by Spline Mixtures

Journal of Time Series Analysis, EarlyView.
ABSTRACT This paper proposes a novel framework for modeling time series of probability density functions by extending autoregressive moving average (ARMA) models to density‐valued data. The method is based on a transformation approach, wherein each density function on a compact domain [0,1]d$$ {\left[0,1\right]}^d $$ is approximated by a B‐spline ...
Yasumasa Matsuda, Rei Iwafuchi
wiley   +1 more source

Synthesis of Adaptive Gain Robust Output Feedback Controllers for a Class of Lipschitz Nonlinear Systems with Unknown Upper Bound of Uncertainty

Journal of Control Science and Engineering, 2012
We propose a new adaptive gain robust output feedback controller for a class of the Lipschitz nonlinear systems with unknown upper bound of uncertainty.
Hidetoshi Oya, Kojiro Hagino
doaj   +1 more source

Asymptotic Almost-Periodicity for a Class of Weyl-Like Fractional Difference Equations

Mathematics, 2019
This work deal with asymptotic almost-periodicity of mild solutions for a class of difference equations with a Weyl-like fractional difference in Banach space.
Junfei Cao, Amar Debbouche, Yong Zhou
doaj   +1 more source

Fourier transforms and their Lipschitz classes [PDF]

Pacific Journal of Mathematics, 1978
Sampson, G., Tuy, H.
openaire   +2 more sources

Robust CDF‐Filtering of a Location Parameter

Journal of Time Series Analysis, EarlyView.
ABSTRACT This paper introduces a novel framework for designing robust filters associated with signal plus noise models having symmetric observation density. The filters are obtained by a recursion where the innovation term is a transform of the cumulative distribution function of the residuals.
Leopoldo Catania, Andrew C. Harvey, Alessandra Luati   +2 more
wiley   +1 more source

On the differentiation of vector valued composite Lipschitz continuous functions

Revista Técnica de la Facultad de Ingeniería, 2011
It is well know that there exists in economic what is referred to as “kinked” demand curves. That is, curves that are Lipschitz continuous. This paper presents a technical theorem on the existence of partial derivatives (and the applicability of the ...
K. P. Gilliam, C. D. Vinante
doaj  

Observer-Based Exponential Stabilization for Time Delay Takagi–Sugeno–Lipschitz Models

Mathematics
This paper addresses the problem of observer-based control (OBC) for nonlinear systems with time delay (TD). A novel hybrid modeling framework for nonlinear TD systems is first introduced by synergistically combining TD Takagi–Sugeno (TDTS) fuzzy and ...
Omar Kahouli, Hamdi Gassara, Lilia El Amraoui, Mohamed Ayari   +3 more
doaj   +1 more source

A Note on Local Polynomial Regression for Time Series in Banach Spaces

Journal of Time Series Analysis, EarlyView.
ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley   +1 more source