Strict positive definiteness in geostatistics
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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
Model for identification of the background emission of Universe microwaves
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DOI: 10.1007/s12648-020-01754-y
Abstract: This article discusses the identification of digital images in the map of the background emission of Universe microwaves developed on the basis of data from the European Space Agency telescope Planck upon applying a simulation… read more here.
Keywords: universe microwaves; covariance functions; background emission; digital images ... See more keywords
Testing Hypotheses about Covariance Functions of Cylindrical and Circular Images
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DOI: 10.1134/s1054661821030159
Abstract: Imaging problems are becoming increasingly important due to the development of systems for aerospace monitoring of the Earth, radio and sonar location, medical devices for early diagnosis of diseases, etc. However, most of the work… read more here.
Keywords: circular images; covariance functions; image; testing hypotheses ... See more keywords