Zobrazeno 1 - 10
of 302
pro vyhledávání: '"Alexandru, N."'
Autor:
BALAN, A. L., ALEXANDRU, N. D.
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 14, Iss 2, Pp 129-134 (2014)
A novel family of inter-symbol interference (ISI) free pulses generated by improved Nyquist filters with a frequency characteristic composed of six parabolic pieces is proposed. We studied the performance of the new pulses in terms of the ISI error
Externí odkaz:
https://doaj.org/article/83281a39b05e476bbfc4105c410955c8
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 12, Iss 1, Pp 71-76 (2012)
The Gaussian pulses have been mostly used within communications, where some applications can be emphasized: mobile telephony (GSM), where GMSK signals are used, as well as the UWB communications, where short-period pulses based on Gaussian waveform a
Externí odkaz:
https://doaj.org/article/2f73050036ac4b07adb462384603f226
Autor:
ALEXANDRU, N. D., ALEXANDRU, M. L.
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 10, Iss 1, Pp 63-66 (2010)
This paper presents a comparative analysis of two families of improved Nyquist filters with a piece-wise parabolic frequency characteristic. Their construction is based on a novel approach and produces ISI-free pulses that shows comparable or better
Externí odkaz:
https://doaj.org/article/aca066ca8e614b21b34eb0af987ff6d0
Autor:
ALEXANDRU, N. D., POHOATA, S.
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 9, Iss 2, Pp 103-108 (2009)
This paper investigates a novel approach for constructing a family of ISI-free pulses produced by improved Nyquist filters with a transfer characteristic derived from an ideal staircase frequency characteristic using interpolation with sine functions
Externí odkaz:
https://doaj.org/article/502d0b5a042e491f9b5b4fa1833da071
Autor:
DURNEA, T. N., ALEXANDRU, N. D.
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 9, Iss 1, Pp 16-21 (2009)
UWB-PPM systems were noted to have a power spectral density (p.s.d.) consisting of a continuous portion and a line spectrum, which is composed of energy components placed at discrete frequencies. These components are the major source of interference
Externí odkaz:
https://doaj.org/article/6df91b65fa9548d4bd9cba3517454e45
Autor:
ALEXANDRU, N. D., ALEXANDRU, M. L.
Publikováno v:
Advances in Electrical and Computer Engineering, Vol 8, Iss 1, Pp 31-35 (2008)
Based on the fact that spectral shaping of digital data signals is obtained by encoding and that there exist spectrally equivalent digital filters, the method of Justesen was applied to derive digital filters that approximate the power spectral densi
Externí odkaz:
https://doaj.org/article/f3519226986147648b5002e2bc0a62ea
Publikováno v:
In Engineering Structures 1 November 2024 318
Publikováno v:
In Engineering Structures 1 October 2024 316
Autor:
Kuşoğlu Aslı, Balabanski Dimiter L., Hu Rongzhe, Fan Siqin, Xu Furong, Constantin Paul, Söderström Pär-Anders, Cuciuc Mihai, Aogaki Soichiro, Ban Sara R., Borcea Ruxandra, Coman Adina, Corbu Radu, Costache Cristian, Covali Andrei, Dinescu Irina, Florea Nicoleta M., Iancu Violeta, Ionescu Alina, Mărginean Nicolae M., Mihai Constantin, Mihai Radu E., Nedelcu Cosmina V., Petruse Teodora, Pai Haridas, Pappalardo Alfio, Sirbu Oana A., Sotty Christophe O., Stan Lucian, State Alexandru N., Testov Dimitry A., Tozar Tatiana, Turturica Andrei, Turturica Gabriel V., Ujeniuc Sorin, Ur Calin A., Vasilca Vlad, Zhu Fan
Publikováno v:
EPJ Web of Conferences, Vol 311, p 00020 (2024)
A γ-ray spectroscopic study of 10B is reported. Excited states in 10B were populated in inelastic proton scattering and their γ-decays were measured with the ELIFANT array, a state-of-the-art spectrometer with large volume LaBr3:Ce and CeBr3 detect
Externí odkaz:
https://doaj.org/article/f56bec20122144b58bbdca4c60c39608
Autor:
Paul Kuschmierz, Anna Beniermann, Alexander Bergmann, Rianne Pinxten, Tuomas Aivelo, Justyna Berniak-Woźny, Gustav Bohlin, Anxela Bugallo-Rodriguez, Pedro Cardia, Bento Filipe Barreiras Pinto Cavadas, Umran Betul Cebesoy, Dragana D. Cvetković, Emilie Demarsy, Mirko S. Đorđević, Szymon M. Drobniak, Liudmyla Dubchak, Radka M. Dvořáková, Jana Fančovičová, Corinne Fortin, Momir Futo, Nicoleta Adriana Geamănă, Niklas Gericke, Donato A. Grasso, Ádám Z. Lendvai, Evangelia Mavrikaki, Andra Meneganzin, Athanasios Mogias, Andrea Möller, Paulo G. Mota, Yamama Naciri, Zoltán Németh, Katarzyna Ożańska-Ponikwia, Silvia Paolucci, Péter László Pap, Maria Petersson, Barbara Pietrzak, Telmo Pievani, Alma Pobric, Juris Porozovs, Giulia Realdon, Xana Sá-Pinto, Uroš B. Savković, Mathieu Sicard, Mircea T. Sofonea, Andrej Sorgo, Alexandru N. Stermin, Ioan Tăușan, Gregor Torkar, Lütfullah Türkmen, Slavica Tutnjević, Anna E. Uitto, Máté Varga, Mirna Varga, Lucia Vazquez-Ben, Constantinos Venetis, Enrique Viguera, Lisa Christine Virtbauer, Albena Vutsova, Inmaculada Yruela, Jelle Zandveld, Dittmar Graf
Publikováno v:
Evolution: Education and Outreach, Vol 14, Iss 1, Pp 1-22 (2021)
Abstract Background Investigations of evolution knowledge and acceptance and their relation are central to evolution education research. Ambiguous results in this field of study demonstrate a variety of measuring issues, for instance differently theo
Externí odkaz:
https://doaj.org/article/8dc518591ef044ca910388f7f33ce55d