Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Eugenia Stoimenova"'
Autor:
Atanas Radenski, Todor Gurov, Kalinka Kaloyanova, Nikolay Kirov, Maria Nisheva, Peter Stanchev, Eugenia Stoimenova
Publikováno v:
Annals of computer science and information systems, Vol 8, Pp 883-888 (2016)
Externí odkaz:
https://doaj.org/article/2dc6d0d2baf247c99be9701f30dcc7c0
Autor:
Eugenia Stoimenova
Publikováno v:
Austrian Journal of Statistics, Vol 46, Iss 3-4 (2017)
In this paper we introduce a measure of closeness of partial rankings based on a metric on permutations, and we analyze some of its properties. We consider two types of partial rankings: ranking the k favorite items out of n and classification into s
Externí odkaz:
https://doaj.org/article/717ef125f8ec4b53ae27af5e8c68a198
Autor:
Eugenia Stoimenova
Publikováno v:
Austrian Journal of Statistics, Vol 37, Iss 1 (2016)
This paper is concerned with the nonparametric estimation of a density function when the data are incomplete due to interval censoring. The Nadaraya-Watson kernel density estimator is modified to allow description of such interval data. An interactiv
Externí odkaz:
https://doaj.org/article/819e13d4c78c4e9cb337950cf272281e
Publikováno v:
Austrian Journal of Statistics, Vol 40, Iss 1&2 (2016)
This paper studies the joint behaviour of precedences of one sample with respect to a threshold from the other sample and exceedances of second sample with respect to a threshold from the first sample. Exact joint distribution of the number of preced
Externí odkaz:
https://doaj.org/article/d8f6122cf6cc478c98b4abbba7cda3f5
Autor:
Nikolay Nikolov, Eugenia Stoimenova
Publikováno v:
AStA Advances in Statistical Analysis. 104:459-484
In this paper, we consider some statistical measures of deviation from the perfect ranking in the framework of ranked set sampling. We use nonparametric approach for testing the null hypothesis for perfect ranking. The distance-based Mallows’ model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fb039507909b2a54edc50b16f14a71e
https://doi.org/10.1007/s10182-019-00354-4
https://doi.org/10.1007/s10182-019-00354-4
Autor:
Eugenia Stoimenova, Slav Angelov
Publikováno v:
Advanced Computing in Industrial Mathematics ISBN: 9783030716158
In this paper, we observe a centered version of a technique that we have called Cross-validated sequentially constructed multiple regression. It cross-validates the estimates of the coefficients in a multiple regression model while merging some of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba4f06e7d49331996d6f632466b9c017
https://doi.org/10.1007/978-3-030-71616-5_2
https://doi.org/10.1007/978-3-030-71616-5_2
Autor:
Eugenia Stoimenova, Nikolay Nikolov
Publikováno v:
Advanced Computing in Industrial Mathematics ISBN: 9783030716158
In this paper, we consider a cluster analysis for complete rankings of N items that aims to identify typical groups of rank choices. The “K-means” procedure based on Lee distance is studied in details and several asymptotical results for large va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90c073f2e03de3739634824db21ddb52
https://doi.org/10.1007/978-3-030-71616-5_27
https://doi.org/10.1007/978-3-030-71616-5_27
Autor:
Eugenia Stoimenova, Nikolay Nikolov
Publikováno v:
Metrika. 82:385-408
Distances on permutations are often convenient tools for analyzing and modeling rank data. They measure the closeness between two rankings and can be very useful and informative for revealing the main structure and features of the data. In this paper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca740fb7384fba5bc57f12b1529bcc67
https://doi.org/10.1007/s00184-018-0687-7
https://doi.org/10.1007/s00184-018-0687-7
Autor:
Nikolay Nikolov, Eugenia Stoimenova
Publikováno v:
Metrika. 84:443-444
The statement of Theorem 3 (p. 397) in (Nikolov and Stoimenova 2019) should be corrected to.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66c509f81d5d741834c8f155813dda9c
https://doi.org/10.1007/s00184-021-00810-9
https://doi.org/10.1007/s00184-021-00810-9
Publikováno v:
Journal of Computational and Applied Mathematics. 388:113289
In this paper, we study reliability properties of a k -out-of- n system with a single cold standby unit. We mainly focus on the case when the system operates in discrete time. In order to describe its aging behavior we consider three different mean r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3751c254b56fcbd7627c14968d12481c
https://doi.org/10.1016/j.cam.2020.113289
https://doi.org/10.1016/j.cam.2020.113289