issue 1-2

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

20190102-06
Analysis of the risks imposed on UAVs in outer space missions
Vasil Vasilev, Emil Vladkov

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The article represents an overview of the different hazards for the operation of Unmanned Aerial Vehicles (UAV) in particular spacecrafts due to the environment in outer space. After a brief history overview of the human inventions ...  read more

20190102-05
Improved wind turbine control using maximum torque per ampere control strategy taking into account the magnetic saturation
Boris Demirkov

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This paper represents an approach for improving the maximum torque per ampere (MTPA) control strategy for permanent magnet synchronous generator (PMSG). The MTPA permits the optimization of the generator stator current for ...  read more

20190102-04
Some features for calibration of analyzers of electric power by power factor
Plamen Tzvetkov, Krasimir Galabov, Ivan Kodjabashev

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In relation to the calibration of analyzers of electric power, the mathematical model of the power factor is represented by its dependence on the phase angle of voltage and current of the first harmonic as well as on the general ...  read more

20190102-03
Algorithm for software realization of video observation system by means of remote control
Lilijana Docheva, Ivo Dochev, Maria Pavlova

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The aim in the article is to present a software realization of video observation system by means of remote control. The system consists of two main components. One of them is a quad-copter and the other is the development ...  read more