Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Lubomir Ivanek"'
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 16, Iss 2, Pp 211-217 (2018)
This paper deals with the change of the ratio of the open circuit impedance to short-circuit impedance of the electric traction depending on the distance of the traction vehicle from the beginning of the section. This ratio is calculated in order to
Externí odkaz:
https://doaj.org/article/53247981a3e04439921fefc014e22ce9
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 15, Iss 2, Pp 280-285 (2017)
A symmetric coupling of methods of finite and boundary elements for numerical solution of transient eddy current problems is described. This is an essential step in modelling of electromagnetic forming of metalic sheets. The finite element method is
Externí odkaz:
https://doaj.org/article/aec1c0995d1a4179a3cce0ebefe5a81e
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 15, Iss 1, Pp 77-83 (2017)
This paper deals with the sensitivity of the input impedance of an open track circuit in the event that the parameters of the track are changed. Weather conditions and the state of pollution are the most common reasons for parameter changes. The resu
Externí odkaz:
https://doaj.org/article/717ac675a7da40d28a2d4ede66926a15
Autor:
Yahia Salem, Lubomir Ivanek
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 14, Iss 2, Pp 139-144 (2016)
In this research various channel propagation models of wireless communication systems were analysed. There are many types of propagation models that can minutely calculate the path loss in all types of terrain. Performance estimation of different pro
Externí odkaz:
https://doaj.org/article/dcffb0be28904c6f9e2bcea76dfaf3bd
Publikováno v:
2022 22nd International Scientific Conference on Electric Power Engineering (EPE).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0808fa941b7ce87844a91fc80e826666
https://doi.org/10.1109/epe54603.2022.9814100
https://doi.org/10.1109/epe54603.2022.9814100
Autor:
Yahia Zakaria, Lubomir Ivanek
Publikováno v:
American Journal of Applied Sciences. 14:349-357
Propagation models represent a solidifying of mathematical equations and algorithms that are used for radio signal propagation prediction in specific regions. In this research different propagation models are analyzed and compared. These propagation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee3d2304a62bb6c9a0e04edcc4cc0118
https://doi.org/10.3844/ajassp.2017.349.357
https://doi.org/10.3844/ajassp.2017.349.357
Autor:
Lubomir Ivanek, Yahia Zakaria
Publikováno v:
American Journal of Applied Sciences. 14:81-89
The goal of this research is to evaluate the location accuracy of User Equipment (UE) in Long Term Evolution (LTE) networks which depends on the timing advance parameters. The ability to locate the subscribers through the network is considered as a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8929be666bc53d31c1c57b39c642e0b6
https://doi.org/10.3844/ajassp.2017.81.89
https://doi.org/10.3844/ajassp.2017.81.89
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 16, Iss 2, Pp 211-217 (2018)
This paper deals with the change of the ratio of the open circuit impedance to short-circuit impedance of the electric traction depending on the distance of the traction vehicle from the beginning of the section. This ratio is calculated in order to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::054ea4696ab5e055cfdf859025c7fd04
https://doi.org/10.15598/aeee.v16i2.2662
https://doi.org/10.15598/aeee.v16i2.2662
Autor:
Yahia Zakaria, Lubomir Ivanek
Publikováno v:
2018 ELEKTRO.
In this research various propagation models are analyzed and compared according to both of calculated and measured results. These propagation models depend on location, frequency range and clutter type such as urban, suburban and countryside. The pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0bf9ce4cee33fec838459d3b0b1f28d
https://doi.org/10.1109/elektro.2018.8398348
https://doi.org/10.1109/elektro.2018.8398348
Publikováno v:
KSII Transactions on Internet and Information Systems. 11
Wireless communication is a telecommunication technology, which enables wireless transmission between the portable devices to provide wireless access in all types of environments. In this research, the measurements and various empirical models are an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d61fc678a9fcd2ed543e865a64869abd
https://doi.org/10.3837/tiis.2017.05.008
https://doi.org/10.3837/tiis.2017.05.008