Zobrazeno 1 - 10 of 214 pro vyhledávání: '"G. Stanev"'
1
Akademický článek
Finding the Number of Latent Topics With Semantic Non-Negative Matrix Factorization
Autor: Raviteja Vangara, Manish Bhattarai, Erik Skau, Gopinath Chennupati, Hristo Djidjev, Tom Tierney, James P. Smith, Valentin G. Stanev, Boian S. Alexandrov
Publikováno v: IEEE Access, Vol 9, Pp 117217-117231 (2021)
Topic modeling, or identifying the set of topics that occur in a collection of articles, is one of the primary objectives of text mining. One of the big challenges in topic modeling is determining the correct number of topics: underestimating the num
Externí odkaz: https://doaj.org/article/707c3e2add48470ab05fd9838d30a334
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3
Akademický článek
Nonnegative Matrix Factorization for identification of unknown number of sources emitting delayed signals.
Autor: Filip L Iliev, Valentin G Stanev, Velimir V Vesselinov, Boian S Alexandrov
Publikováno v: PLoS ONE, Vol 13, Iss 3, p e0193974 (2018)
Factor analysis is broadly used as a powerful unsupervised machine learning tool for reconstruction of hidden features in recorded mixtures of signals. In the case of a linear approximation, the mixtures can be decomposed by a variety of model-free B
Externí odkaz: https://doaj.org/article/5aeb4cde40784611a30efe1e62ab16e7
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4
Ultra-short laser pulse modification of chitosan/silver nanoparticles (AgNPs) thin films for potential antimicrobial applications
Autor: B. Calin, E. Filipov, G. Yankov, A. Daskalova, L. Angelova, A. Dikovska, G. Stanev, Dante Aceti, E. Iordanova, M. Zamfirescu
The last several years witnessed increasingly rapid advances in applying biopolymers in tissue engineering for the purposes of regenerative medicine. The growing demand for preparing materials with desired physical, biological and mechanical properti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f86b5764c7a2a1e17d3e360dd2c9af5
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5
Effect of laser parameters on ultra-short laser processing of SiC
Autor: L. Angelova, Ivan Buchvarov, Anton Trifonov, G. Stanev, A. Daskalova, M Kandeva, F Petit
Publikováno v: Journal of Physics: Conference Series. 1859:012015
Crystalline silicon carbide (SiC) is a very attractive material in the fields of microelectronics, MEMS and biomedicine mainly due to its chemical inertness and mechanical strength. It is used for SiC MEM sensors, micro motors and resonators [1]. In
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6faa232429925419033dbd4812b7112c
https://doi.org/10.1088/1742-6596/1859/1/012015
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6
Akademický článek
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7
The crankshaft position sensor based on magnetoelectric materials
Autor: V. T. Pacheliev, Penko Bozhkov, Roman V. Petrov, L. G. Stanev, Slavcho Bozhkov, N. A. Kolesnikov, Ivan Milenov, V. S. Leontiev, Mirza Bichurin
Publikováno v: 2016 IEEE International Power Electronics and Motion Control Conference (PEMC).
This paper is devoted to the research of possibilities of applying of the magnetoelectric material as the sensing element of a crankshaft position sensor. Proposed magnetoelectric crankshaft position sensor would have several advantages against the t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26e2ccb104e0728489a4a73b01d494c6
https://doi.org/10.1109/epepemc.2016.7752105
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8
Determination of the photoelectron current density based on comparison between IESP-2 and KM-7 probe measurements of the interball-2 satellite potential relative to plasma
Autor: N. F. Smirnova, G. Stanev
Publikováno v: Geomagnetism and Aeronomy. 49:1204-1207
We propose a technique for determining the photoelectron current density based on comparison between simultaneous IESP-2 (electric field meter) and KM-7 (electron temperature sensor) probe measurements of the Interball-2 satellite potential relative
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfe269fb8009931d3a4d7b93fa49fc9a
https://doi.org/10.1134/s0016793209080337
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9
Comparison of interball-2 spacecraft potential from IESP and KM-7 experiments in high-latitude regions of the magnetosphere at altitudes of 2–3 RE
Autor: N.F. Smirnova, G. Stanev, J. Smilauer, V.V. Afonin
Publikováno v: Advances in Space Research. 31:1401-1406
Measurements of Interball-2 spacecraft potential by two instruments, IESP and KM-7, are reviewed and simultaneous measurements are compared. Unacceptable discrepancy between results of spacecraft potential measurements, including opposite signs, was
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a4e1644c3623e89e7af733f4c787ffc7
https://doi.org/10.1016/s0273-1177(02)00954-7
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10
Study of stratification of magnetospheric convection using intercosmos-Bulgaria-1300 electric field observations
Autor: Elizaveta Antonova, Marina Stepanova, G Stanev, N Bankov, N.V Isaev
Publikováno v: ADVANCES IN SPACE RESEARCH
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
The medium scale stratification theory of upward field-aligned currents predicts some periodicity in the electrostatic potential profile (and subsequently in the field-aligned current profile) that could account for oscillations experimentally observ
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b1a5fbe1dfa7d9a656f5ae7c45e0891
https://doi.org/10.1016/s0273-1177(03)00019-x
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