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   Articles with "strictly positive" as a keyword



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Strict positive definiteness in geostatistics

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recommendations! Published in 2017 at "Stochastic Environmental Research and Risk Assessment"

DOI: 10.1007/s00477-017-1432-x

Abstract: Geostatistical modeling is often based on the use of covariance functions, i.e., positive definite functions. However, when interpolation problems have to be solved, it is advisable to consider the subset of strictly positive definite functions.… read more here.

Keywords: positive definite; covariance functions; strictly positive; strict positive ... See more keywords
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Synthesis of strictly positive real ℋ2 controllers using dilated LMIs

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recommendations! Published in 2019 at "International Journal of Control"

DOI: 10.1080/00207179.2018.1453615

Abstract: ABSTRACT This paper considers strictly positive real (SPR) controller design via direct minimisation of an upper bound on the closed-loop norm. To realise a tractable design problem, an observer-based control structure is assumed and a… read more here.

Keywords: positive real; dilated lmis; strictly positive; using dilated ... See more keywords
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Comments on “New Results on the Characterization of Strictly Positive Real Matrix Transfer Functions”

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recommendations! Published in 2023 at "IEEE Transactions on Automatic Control"

DOI: 10.1109/tac.2022.3218616

Abstract: In this note, we address an inconsistency in our recent article (Hakimi-Moghaddam and Ferrante, 2021). In particular, we provide an example showing that Lemma III.1 of that article is not correct. We show how the… read more here.

Keywords: strictly positive; new results; results characterization; comments new ... See more keywords
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Strictly Positive Definite Functions on the Space of Infinite Diagonal Matrices

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recommendations! Published in 2019 at "Mathematical Notes"

DOI: 10.1134/s0001434619110324

Abstract: In this paper, using a Bochner-type theorem, we establish a characterization of strictly positive definite functions on the topological direct limit space D∞ of real diagonal matrices relatively to the action of the product group… read more here.

Keywords: strictly positive; definite functions; diagonal matrices; positive definite ... See more keywords