issue 3-4

20190304-full
Issue 3-4, 2019

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 54. No 3-4/2019
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20190304-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Jordan Raychev, Diyana Kinaneva, Georgi Hristov, Plamen Zahariev
Comparative ...  read more

20190304-06
Simulation of the temperature distribution and modelling of molten pool parameters at electron beam drip melting of copper
Tsvetomira Tsonevska, Elena Koleva, Lilyana Koleva, Georgi Mladenov

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In this article quasi steady-state two-dimensional heat model is implemented for the simulation of the temperature distribution in the cast copper ingots through electron beam drip melting. Regression models are estimated ...  read more

20190304-05
Review of hardware-in-the-loop – a hundred years progress in the pseudo-real testing
Nikolay Brayanov, Anna Stoynova

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In the last two decades, the electronics and mechatronics systems became undividable part of human life. With increasing of the number of application fields and functionalities, they became more complex and a lot more efforts ...  read more

20190304-04
Simple PV battery charger without MPPT based on SEPIC converter
Hristo Antchev, Anton Andonov

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This article describes a specific implementation of a SEPIC converter for charging an accumulator battery from a photovoltaic panel and which is characterized by simple control without MPPT. Here are presented some basic mathematical ...  read more

20190304-03
Analysis of non-preemptive priority single-server queueing systems with peaked traffic flows
Seferin Mirtchev, Rossitza Goleva, Dimitar Atamian, Ivan Ganchev

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In this article, single-server priority queueing systems with a peaked arrival process, generally distributed service time and infinite waiting position is analyzed by using the Polya distribution to describe the peaked traffic ...  read more

20190304-02
Spectra of multilayer networks – mathematical foundations, metrics, spectral properties
Mircho J. Mirchev

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This article reviews a generalize approach of network models of complex systems and networks by introducing layers, thus defining multilayer networks. Having the multilayer property on the network model, it can better describe ...  read more

20190304-01
Comparative analysis of the possibilities of building a decentralized control plane of a Software Defined Networks
Jordan Raychev, Diyana Kinaneva, Georgi Hristov, Plamen Zahariev

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The objective of the current paper is to be conducted a comparative analysis of the available possibilities for building a decentralized controller plane of a Software Defined Network (SDN). The SDN networks are an emerging ...  read more

20180304-full
Issue 3-4, 2018

ELECTROTECHNICA & ELECTRONICA E+E

Thirteenth International Conference on Electron Beam Technologies – EBT 2018, 18-22 June, Varna, Bulgaria

Vol. 53. No 3-4/2018
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

 

20180304-full

 

C O N T E N T S

Special issue: Scientific papers from 13-th International Conference on Electron Beam Technologies – EBT 2018, Varna, BULGARIA
Preface by Corr. Member of BAS, Prof. DSc. G. Mladenov, Assoc. Prof. Elena Koleva, Bulgaria 50

ADITIVE MANUFACTUTING, SELECTIVE MELTING

Christopher Arnold, Fuad Osmanlic, Christoph Pobel, Max Wormser, Carolin Körner
Enhanced process control during selective electron beam melting through advanced machine technology 51

Vitaliy H. Zaleski, Igar L. Pobol, Andrey A. Bakinovski, Artem D. Gubko, Alexander A. Burin
Wire based electron beam additive manufacturing of blocks and complex shape parts 55

Dmytro Kovalchuk, Vitalii Melnyk, Ihor Melnyk, Borys Tugai
Advanced technical and technological solutions for additive manufacturing by xBeam 3D metal printing 60

Vladyslav A. Matviichuk, V. M. Nesterenkov, M. O. Rusynik


 ...  read more

20140304-full
Issue 3-4, 2014

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 49. No 3-4/2014
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20140304-full

C O N T E N T S

ELECTRONICS

Mariya P. Aleksandrova, Irena P. Nestorova
Fabrication of flexible hybrid low molecular weight compound/polymer light emitting device by screen printing 2

Radoslav B. Borisov, Kaloyan I. Zlatkov, Plamen I. Dankov
Near-field measurements using low cost equipment for RF device characterization 7

Vladimir V. Dimitrov, Peter T. Goranov
Modelling of step-up DC converter 13

Svilen H. Stoyanov


 ...  read more

20140304-08
Corporate education for manufacturing (Semiconductors) – creation of a training system and technical textbook
Hiroyuki Izumo, Keisuke Konishi, Rei Wada, Takashi Imagawa, Susumu Kise, Shenji Hatada, Takeshi Tanaka, Shigeo Hirano

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Artner Co., Ltd. is currently dependant on a variety of outsourcing systems that have been implemented with a high degree of technical assistance for the completion of projects. In large scale integration (LSI) design and ...  read more