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Adaptive Control for Systems With Time-Varying Parameters [PDF]
IEEE Transactions on Automatic Control, 2021 This article investigates the adaptive control problem for systems with time-varying parameters using the so-called congelation of variables method. First, two scalar examples to illustrate how to deal with time-varying parameters in the feedback path and in the input path, respectively, are discussed.
Kaiwen Chen, Alessandro Astolfi
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Multiway clustering with time-varying parameters
Computational Statistics, 2022 AbstractThis paper proposes a clustering approach for multivariate time series with time-varying parameters in a multiway framework. Although clustering techniques based on time series distribution characteristics have been extensively studied, methods based on time-varying parameters have only recently been explored and are missing for multivariate ...
Roy Cerqueti +2 more
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An Alternative Estimation Method for Time-Varying Parameter Models
Econometrics, 2022 A multivariate, non-Bayesian, regression-based, or feasible generalized least squares (GLS)-based approach is proposed to estimate time-varying VAR parameter models.
Mikio Ito, Akihiko Noda, Tatsuma Wada
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Parametric and Coordinate Control of Oscillating Systems: Physics-Based Oscillation Feedback Design
IEEE Access, 2021 This paper presents and compares two practical implementation schemes based on parametric and coordinate control. The parametric feedback control idea employs a parametric resonance phenomenon.
Leonid Chechurin +3 more
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Time-Varying Parameters in Econometrics: The editor’s foreword
Journal of Econometrics, 2023 The Themed Issue Time-Varying Parameters in Econometrics consists of eight papers where theoretical, methodological and empirical developments are reported. Particular attention is given to observation-driven time-varying parameter models of which score-driven models is a sub-class. We will introduce the Themed Issue and review its contributions.
Blasques, F. +3 more
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Journal of Hydrology: Regional Studies, 2021 Study region: Upper Yangtze River Basin, China. Study focus: The intensification of climate change and human activities leads to non-stationarity of hydrological processes. Previous studies mainly focus on monthly hydrological or Budyko models.
Xiaojing Zhang +5 more
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Maximum Likelihood With a Time Varying Parameter
Statistical Papers, 2023 AbstractWe consider the problem of tracking an unknown time varying parameter that characterizes the probabilistic evolution of a sequence of independent observations. To this aim, we propose a stochastic gradient descent-based recursive scheme in which the log-likelihood of the observations acts as time varying gain function.
Lanconelli A., Lauria C. S. A.
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A Recursive Least-Squares with a Time-Varying Regularization Parameter
Applied Sciences, 2022 Recursive least-squares (RLS) algorithms are widely used in many applications, such as real-time signal processing, control and communications. In some applications, regularization of the least-squares provides robustness and enhances performance ...
Maaz Mahadi +3 more
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Kuramoto model with time-varying parameters [PDF]
Physical Review E, 2012 We introduce a generalization of the Kuramoto model by explicit consideration of time-dependent parameters. The oscillators' natural frequencies and/or couplings are supposed to be influenced by external, time-dependant fields, with constant or randomly-distributed strengths.
Petkoski, Spase, Stefanovska, Aneta
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Mathematics, 2022 The solution of a complex-valued matrix pseudoinverse is one of the key steps in various science and engineering fields. Owing to its important roles, researchers had put forward many related algorithms.
Yihui Lei +4 more
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