Decoupling multivariate functions using a nonparametric filtered tensor decomposition

Autor:	Decuyper, Jan, Tiels, Koen, Weiland, Siep, Runacres, Mark C., Schoukens, Johan
Rok vydání:	2022
Předmět:	Statistics - Machine Learning Electrical Engineering and Systems Science - Systems and Control
Druh dokumentu:	Working Paper
DOI:	10.1016/j.ymssp.2022.109328
Popis:	Multivariate functions emerge naturally in a wide variety of data-driven models. Popular choices are expressions in the form of basis expansions or neural networks. While highly effective, the resulting functions tend to be hard to interpret, in part because of the large number of required parameters. Decoupling techniques aim at providing an alternative representation of the nonlinearity. The so-called decoupled form is often a more efficient parameterisation of the relationship while being highly structured, favouring interpretability. In this work two new algorithms, based on filtered tensor decompositions of first order derivative information are introduced. The method returns nonparametric estimates of smooth decoupled functions. Direct applications are found in, i.a. the fields of nonlinear system identification and machine learning. Comment: Preprint submitted to Journal of Mechanical Systems and Signal Processing
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2205.11153 Zobrazit plný text záznamu View this record from Arxiv