issue 1-2

20210102-full
Issue 1-2, 2021

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 56. No 1-2/2021
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20210102-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE
Seferin Mirtchev, Mircho Mirchev, Georgi Georgiev
Models ...  read more

20210102-01
Models and methods for analysis of the stochastic processes in IP based networks – survey
Seferin Mirtchev, Mircho Mirchev, Georgi Georgiev

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Today, the internet network is in a base to almost any social, educational or economic activity, a true value creator that reshapes the economy and society. In the future, the IP based networks will be even more essential ...  read more

20210102-02
Influence of the middle pole shape on the force characteristic of an actuator with Т-shaped armature
Ivan Hadzhiev, Dian Malamov, Iosko Balabozov, Ivan Yatchev

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In the paper, a study of the influence of the middle pole shape on the static force characteristic of a direct-current solenoid actuator with T-shaped armature is presented. For this purpose, computer models of the actuator ...  read more

20210102-03
Thermal model of bidirectional DC/DC converter
Evgeni Malev

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The purpose of this article is to create and analyze a mathematical model of Isolated full-bridge bidirectional DC/DC converter for electric vehicle application. The article considers and analyzes mathematical models of the ...  read more

20200102-full
Issue 1-2, 2020

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 55. No 1-2/2020
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20190102-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE
Georgi Petrov, Anushka Stancheva
Problems ...  read more

20200102-01
Problems related to EMC caused by low-altitude flying drones in urban environment
Georgi Petrov, Anushka Stancheva

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Mass electrification of personal transportation vehicles creates prerequisites for massive mobile sources of electromagnetic interference. These is especially strong in dense urban environments. The problem with the introduction ...  read more

20200102-02
Data fusion from different protocols and integrating them into a mesh network for personal assistant of technical manager
Boyan K. Mednikarov, Yordan A. Sivkov, Chavdar I. Alexandrov, Miroslav Y. Tsvetkov, Veselin E. Atanasov, Marinela I. Petrova

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Automatic data collection and decision-making processes are crucial in optimizing production processes. One of the main tasks is to significantly reduce the time and cost of making management decisions, and achieve flexible ...  read more

20200102-03
Investigation of preemptive priority single-server queueing systems with peaked traffic flows
Seferin Mirtchev

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

20200102-04
Big Data Framework overview
Elena Shoikova, Roumen Nikolov, Eugenia Kovatcheva, Boyan Jekov, Lyubomir Gotsev

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This work presents the results of a systematic review about the Big Data Framework. The overview of the meanings of the broad terms Big Data and Data Science is based mainly on NIST Big Data Interoperability Framework (National ...  read more

20190102-full
Issue 1-2, 2019

ELECTROTECHNICA & ELECTRONICA E+E

Vol. 54. No 1-2/2019
Monthly scientific and technical journal
Published by:
The Union of Electronics, Electrical Engineering and Telecommunications /CEEC/, BULGARIA

20190102-full

C O N T E N T S

TELECOMMUNICATIONS SCIENCE

Tsvetoslava Kyoseva
Definitions for disruptive innovation in telecommunication technologies 1

Mircho Mirchev
On the spectra of scale-free and small-world networks 9

Lilijana Docheva, Ivo Dochev, Maria Pavlova
Algorithm for software realization of video observation system by means of remote control 17

ELECTRICAL ENGINEERING

Plamen Tzvetkov, Krasimir Galabov, Ivan Kodjabashev


 ...  read more