ABSTRACTS OF PAPERS of Assoc. Prof. Dr. Emiliya Andonova … · 2020. 4. 2. · Engineering Faculty...

1

ABSTRACTS OF PAPERS

of Assoc. Prof. Dr. Emiliya Andonova Dimitrova,

presented for participation in a competition for the academic position of Professor

In the Field of Higher Education 5. Engineering,

Professional field 5.3. “Communication and Computer Engineering”

(Systems for Remote Monitoring and Control in Transport)

(announced at the State Gazette, issue 97 / 10.12.2019)

A list of 37 works is submitted for participation in the competition (other than those based on the

PhD thesis and the procedure for the academic position “Associate Professor”) that includes:

33 scientific publications and 4 educational editions:

1 monograph – Indicator V3,

5 scientific publications in editions, refereed and indexed in world-wide databases with scientific

information (Scopus) – Indicator G7,

27 publications in refereed Proceedings – Indicator G8,

2 university textbooks – Indicator E23,

2 university manuals – Indicator E24.

For the participation in the competition, а list of 68 citations of the scientific papers is presented

(described in the "Reference for citations of scientific publications" and the "Reference for meeting the

minimum requirements"), divided into groups, as follows:

6 Citations in scientific journals refereed and indexed in world-wide databases with scientific

information (Scopus) - Indicator D12,

55 Citations in monographs and refereed Proceedings of international scientific conferences -

Indicator D13,

7 Citations in refereed journals - Indicator D14.

From the list of 33 scientific publications submitted,

9 are Sole publications as follows:

1 monograph,

8 articles and papers that includes:

1 Scientific publication in IEEE Xplore Digital Library, refereed and indexed in

world-wide databases with scientific information (Scopus),

7 Scientific publications in Proceedings of international scientific conferences;

24 are Co-authored publications (with two authors):

The candidate is the first author in 14 publications –

4 of them are publications in IEEE Xplore Digital Library, refereed and indexed

in world-wide databases (Scopus)

A total of 10 papers are published in Proceedings abroad, of which:

1 sole publication, refereed and indexed in Scopus,

9 co-authored publications (with two authors) – 4 of them are refereed and indexed in

Scopus.

Participation in 18 national research and educational projects is documented,

the candidate is a manager of 3 of them.

2

REFERENCE

for the fulfilment of the minimum national requirements under Art. 2b, (2) and (3), respectively

the requirements under Art. 2b, (5) of the Act on the Development of the Academic Staff in the

Republic of Bulgaria

Groups of

indicators Content

Norm

(minimum number of points)

Number of points of

the candidate

А Indicator 1 50 50 p.

V Indicator 3 or 4 100 100 p. (Indicator 3)

G Sum of the

indicators from 5 to

9

200 514 p.:

Indicator 7 – 148 p.


D Sum of the

indicators from 12

to 14

100 239 p.:




Е Sum of the

indicators from 16

to 26

150 268,11 p.:




Indicator 22 – 2,11 p.



Total points: 600 1171,11 p.

I. Indicator V3: Habilitation work - MONOGRAPH

V3.1. Dimitrova E., Analysis and diagnostics of the reliability of signalling systems equipment,

Monograph, ISBN 978-619-239-361-8, Avangard prima, Sofia, 2020

The monograph is 114 pages in length, in compliance with the requirement of the Act on the

Development of the Academic Staff in the Republic of Bulgaria (§ 1, item 10 of Additional Provisions).

It consists of a preamble, an introduction, three thematic chapters, a conclusion and a bibliography

including 86 literature sources.

The contemporary signalling systems are an integral part of the remote monitoring and control

systems in transport. They perform many functions and are a set of different components (electronic,

electrical, hydraulic, mechanical, software, etc.) that interact synergistically and exchange information

with each other.

In the monograph, the basic concepts and indicators of reliability theory that are required for analysis

and research are systematized. These include mean time to failure (MTTF), Probability of failure-free

operation, failure rate, indices of availability and unavailability, etc.

The peculiarities of the signalling systems in rail transport are outlined. The tables and graphs

indicate the types of events (accidents, incidents and situations close to incidents), as well as their

elements. Failure data have been systematized and purposefully grouped into subsystems (external

equipment, indoor equipment, inter-station equipment and telecommunications), which is of considerable

practical importance, especially for operation. Grouping is also done on a geographical basis, which is

more important than technical. These failures have been compared to metropolitan equipment failures,

thus making the survey national.

The performed reliability analysis clearly proves the necessity of defining the complex indicators of

freedom from failure and amenability to repair, which gives a much more accurate estimation of the

operational reliability of the devices compared to the statistical processing of information.

3

The classification of the tree structures used in the design of signalling systems and reliability

research - static, dynamic (considered over time), two-channel, symmetric failures, etc. is done. Methods

for analysis of dynamic failure trees (Markov chains, Monte Carlo simulation), as well as the software

products that enable their computer implementation are also classified.

Methods for diagnostics in the signalling systems according to their peculiarities and specific

operating conditions have been developed and verified – they have been systematized by types of

equipment, for on-site testing, without dismantling, in order to detect malfunctions and deteriorated

parameters. Criteria for the selection of control and measuring equipment used for rapid and accurate

diagnosis and assessment of the residual life of the tested equipment are systematized. The requirements

for the functionality and capability of the measuring instruments are indicated. The data for the usual

values of the characteristics of the objects are specified.

Methods for elements and equipment testing in laboratory conditions are proposed.

Some of the results of the research were presented at prestigious scientific forums with international

participation, including refereed and indexed in world-wide databases with scientific information

(Scopus).

II. Group of indicators G: SCIENTIFIC PUBLICATIONS

II.1. Indicator G7: Scientific publications in proceedings of papers, refereed and indexed in

world-wide databases with scientific information (Scopus)

G7.1. Dimitrova E., V. Dimitrov, An Approach for Determination of the Structural Reliability of

Information and Control Systems, International conference CREBUS-2019, IEEE Explore Digital

Library, IEEE Part Number CFP19U17-ART, Scopus DOI: 10.1109/CREBUS.2019.8840051;

https://ieeexplore.ieee.org/document/8840051

Abstract: The contemporary systems for monitoring and management of remote technical objects in

transport and energy sectors are very complex systems whose purpose is centralized data acquisition of

dispersed geographical sites, information processing and generation of managerial impacts. The main

criteria for the efficiency while synthesizing systems for monitoring and control on complex technical

objects are the system's performance, its reliability and cost. This article proposes an approach that can be

used in the stage of synthesis of the structure of such systems. Special attention is paid to the realization

when selecting technical and control devices, which satisfy any technical requirements according to

necessary high reliability. The main indices of reliability assessment are systematized, which allows a

quick and accurate determination of the structure of complex technical systems in their design.

The results of study of reliability models using components with different failure rate λ are analyzed

and the ability to achieve the required system reliability by selecting the optimal technical implementation

has been demonstrated.

G7.2. Dimitrova E., P. Atanasov, Transition between languages for description of probabilistic

models, 10th Electrical Engineering Faculty Conference (IEEE Conferences BulEF-2018), 11-14 Sept.

2018, Sozopol, Bulgaria, IEEEXplore Digital Library, ISBN: 978-1-5386-7565-6, IEEE Part Number:

CFP18BUL-ART, Scopus DOI: 10.1109/BULEF.2018.8646935 ;


Abstract: DFTCalc and YAMS (a model previously drawn in KB3 is used according to the system

configuration examined) can simulate probabilistic models - static as well as dynamic fault trees with

unrepairable elements. It is necessary for this to build the fault tree and to enter the failure rates of the

individual elements (basic events). In KB3 this is done by means of a graphical user interface (GUI), after

that the model is simulated by YAMS. In DFTCalc this is achieved by writing in the Galileo language,

which reflects the structure and parameters of the tree.

G7.3. Dimitrova E., P. Atanasov, Simulation of probabilistic models, 10th Electrical Engineering

Faculty Conference (IEEE Conferences BulEF-2018), 11-14 Sept. 2018, Sozopol, Bulgaria,

4

IEEEXplore Digital Library, ISBN: 978-1-5386-7565-6, IEEE Part Number: CFP18BUL-ART,

Scopus DOI: 10.1109/BULEF.2018.8646943, 2018 https://ieeexplore.ieee.org/document/8646943

Abstract: Nowadays the quantitative estimation of risk is crucial in the realization of the so-called

“risk systems”. Programs for simulation of the models of these systems exist, by which some of their

dependability indices can be calculated. In this paper, two software products and the possibilities for

graphical representation of the results are analyzed. Simulations of a dynamic fault tree with two software

products - DFTCalc and YAMS have been presented. The results from the two simulations are identical.

The advantages and disadvantages of these two software products are specified.

G7.4. Dimitrova E., V. Dimitrov, Integration of a photovoltaic plant to a building management

system, International conference CREBUS-2019, IEEE Explore Digital Library, ISBN 978-1-7281-

3467-3, IEEE Part Number CFP19U17-ART, Scopus DOI: 10.1109/CREBUS.2019.8840101;


Abstract. In this paper, an alternative power supply of many control devices included in the building

management system is ensured. For this purpose, a hybrid photovoltaic plant is integrated and provides

supply to DC and AC consumers. Energy efficiency is also improved. Solar energy is converted into

electricity using solar modules mounted on the building roof. The developed system provides not only

uninterruptible power supply of the operating DC circuits, computers and other office equipment, but also

the possibility to produce and print reports (protocols) upon request by the operator (dispatcher) and

according to many predefined criteria. These reports offer many opportunities for optimization of the

energy consumption and technical maintenance of the electrical equipment.

G7.5. Dimitrova E., Analysis of Automatic Control Systems for Metro Trains, 11th Electrical

Engineering Faculty Conference (IEEE Conferences BulEF-2018), 11-14 Sept. 2019, Varna, IEEEXplore

Digital Library (in the process of being published)

Abstract. The purpose of the paper is to present the features, purpose and classification of the automatic

control systems for metro trains. A general scheme of a contemporary Communications Based Train

Control (CBTC) system for automatic control metro trains is considered. Its constituent components, their

purpose and interconnections are indicated.

The subway lines that are based on the CBTC system meet the GoA4 requirements and have high

reliability based on the complete redundancy of both wayside and train onboard equipment.

CBTC system also offers continuous and reliable train monitoring including visualization of alarm

events, event logs and logging of system operating parameters, as well as many additional diagnostic

options.

The ATO function (Automatic Train Operation – a driverless capability) is also provided to ensure

better provision of the transport service and more environmentally friendly/ economical train management.

There is no need of physical signals along the track side.

II.2. Indicator Г8: Scientific publications in Proceedings with scientific review

G8.1. Cherneva G., Dimitrova E. Synergistic Model of Traffic Flows. IXth International Conference

“Heavy Machinery-HM 2017”, Zlatibor, 28.06.- 1.07.2017, Proceedings, ISBN 978-86-82631-89-7, pp.

B103 – B-108; http://www.hm.kg.ac.rs/documents/HM2017-Proceedings.pdf

Abstract: Many different models are used for traffic flows examination - macroscopic, microscopic,

kinetic, stochastic, timed, etc. models.

The traffic flow can also be examined as an open dynamic system that is subjected to the complex

influence of different types of disturbances. This is why the traffic flows can be modeled and analyzed

using the methods of non-linear dynamics.

5

In view of the general laws of the traffic flow as a dynamic system, a traffic flows model based on the

Lorenz system is proposed in the paper. The model has been simulated in Mathcad environment and has

been tested at changing its parameters.

G8.2. Dimitrova E., P. Atanasov, Dynamic fault tree. computation of parameters – part I, IXth

International Triennial Conference “Heavy Machinery HM 2017”, Zlatibor, Serbia,

June 28 – July 1 2017, Proceedings, ISBN 978-86-82631-89-7, pp. B109-B114 ;

http://www.hm.kg.ac.rs/documents/HM2017-Proceedings.pdf

Abstract: Risk analysis is an important activity to ensure that critical assets, like medical devices and

nuclear power plants, operate in a safe and reliable way. Fault Tree analysis (FTA) is one of the most

prominent techniques, used by a wide range of industries. Fault Trees (FTs) are a graphical method that

model how failures propagate through the system, that is, how component failures lead to system failures.

FTA investigates whether the system design is dependable enough. It provides methods and tools to

compute a wide range of properties and measures. FTs can roughly be described as directed acyclic graphs,

whose leaves (events) model component failures and whose gates - failure propagation. Dynamic Fault

Trees (DFTs) are the best known extensions to Static Fault Trees (SFTs). DFTs are capable of expressing

features that are not expressible in SFTs, like spare management, different operational modes, dependent

events. These properties of DFTs make them suitable for many situations, where SFTs cannot be applied.

This paper discusses the main methods for computation of some of the parameters of a DFT.

G8.3. Atanasov P., Dimitrova E., Dynamic fault tree. computation of parameters – part II,

IXth International Triennial Conference “Heavy Machinery HM 2017”, Zlatibor, Serbia,

June 28 – July 1 2017, Proceedings, ISBN 978-86-82631-89-7, pp. B115-B122;

http://www.hm.kg.ac.rs/documents/HM2017-Proceedings.pdf

Abstract: In this paper, some of widely used software products for quantitative analysis of Dynamic

Fault Trees (DFTs) are commented. The computation of failure probabilities and the characteristics of

DFTs with two software products is examined: DFTCalc (a tool for Input/Output Interactive Markov chain

analysis of DFTs) and YAMS (a tool for Monte Carlo simulation of DFTs). Many types of systems can

be described using Dynamic FTs. In the article, DFT, describing a typical signaling system, is synthesized

and simulated using these software products. The unreliability results calculated by the two programs are

compared and analysed.

G8.4. Dimitrova E., V. Dimitrov, Contemporary Trends for Increasing the Reliability of the SCADA

systems Communication Level, 51st International Scientific Conference ICEST 2016, Ohrid, Macedonia,

June 28 - 30 2016, Proceedings, ISBN 978-9989-786-78-5, pp. 115-118

http://icestconf.org/wp-content/uploads/2016/proceedings/ICEST2016.pdf

Abstract: In this paper the benefits of the implementation of the OTN (open transport network) in the

communication level of SCADA systems are given. The system reliability can be remarkably increased

by implementing optical OTNs which provides Accident Prevention and transfer all available

communication applications, data, voice, digital video etc. OTN ‘s main features are simplicity, openness,

easy integration, ability to cover very large distances, as well as the future-proof design. The time required

by a message to travel between different OTN nodes is specified. Some contemporary and efficient

SCADA systems based on the OTN principle, which are functioning in important spheres as transport and

energetics in Bulgaria, are described.

G8.5. Dimitrov V., E. Dimitrova, Using PLC for Control on Asynchronous Drives – Laboratory

Simulator, 51st International Scientific Conference ICEST 2016, Ohrid, Macedonia, June 28 - 30 2016,

Proceedings, ISBN 978‐9989‐786‐78‐5, pp. 471-474.


Abstract: Programmable Logic Controllers (PLCs) are used at the field level in the contemporary

SCADA systems. They collect data about the current status of the controlled objects and transmit them to

the Dispatcher Post through the communication level. In this paper, a PLC has been involved into some



6

laboratory simulators to ensure remote monitoring and control on the drives performance. A touch panel

has been connected to the PLC and gives a possibility of entering data of initialization and operation

conditions, as well as of data visualization. The following stands are described: two simulators for testing

of frequency controlled asynchronous drives and a stand for testing of an asynchronous drive controlled

by a soft starter. They offer opportunities for various asynchronous drives testing and are useful in the

students training and research. Possibilities of student’s practical training the programming skills for

setting-up the soft starters, frequency converters, PLCs and touch screens, as well as the synthesis of

algorithms for optimal control on the drive systems are ensured.

G8.6. Димитрова Е., Conceptual description of the processes of remote control and monitoring of

mobile objects, III International Scientific Conference „TEIT 2016”, Bansko, 30.09 - 01.10.2016, Acad.

Journal „Mechanics, Transport, Communications“, ISSN 1312-3823, Vol. 14, Issue 3/2, 2016, Art. №

1394, pр. ХI-22 – ХI-25 ; https://mtc-aj.com/library/1394.pdf

Abstract: The report proposes a conceptual model of a system for remote monitoring and control of

active mobile objects (AМO) in railway transport. The purpose of the management of AMOs is

formulated, the transactions relating to information, substances and energy exchange between the active

mobile objects, the objective and securing devices and the control center are specified. The proposed

conceptual model is the basis for the creation of an imitation model and development of a system for

remote control and monitoring of mobile objects.

G8.7. Dimitrova Е., V. Dimitrov, Systems for remote monitoring and control of objects in railway

transport, International Conference „Automatics and Informatics 2016“, 4-6.Х.2016, Sofia, SAI-John

Atanasoff Society of Automatics and Informatics, Proceedings, ISBN 1313-1850, pp.45-48

Abstract: SCADA systems are often used in some important industry sectors, as well as in transport

management. On the other hand, most of the railway stations in Bulgaria are not controlled by SCADA

systems. This paper proposes methods for integration of local rail traffic management systems into a

SCADA system for remote monitoring. The necessary equipment is integrated into the existing

interlocking systems and connected to the station controller. Communication terminals and an optical

transmission medium transmit information and commands between the control center and the stations.

This creates conditions for an objective analysis of events relevant to traffic safety, improves the safety

and security of the transport process, significantly reduces the likelihood of admission of risks arising

from traffic manager actions or related to the operation of the relevant station interlocking systems.

Г8.8. Dimitrova E., SCADA systems for Building automation, III International Scientific

Conference „TEIT 2016”, Bansko, 30.09 - 01.10.2016, Acad. Journal „Mechanics, Transport,

Communications“, ISSN 1312-3823, Vol. 14, Issue 3/2, 2016, Art. № 1395, pр. ХI-26 – ХI-31 ;

https://mtc-aj.com/library/1395.pdf

Abstract: In this paper, the principles of construction of systems for remote monitoring and control of

objects and processes in modern buildings are examined. Such systems are increasingly being deployed

to meet the rising requirements exercisable in respect of the microclimate in the administrative, industrial,

and residential buildings especially in some special-purpose buildings (hospitals, museums, etc.). The

principles and specific features in the development of SCADA-systems for building automation are

discussed; particular attention is paid to processes and facilities that must be placed under remote

monitoring and control. An example system with the necessary components and devices is shown and

functions they must perform are defined.

G8.9. Dimitrova Е., System for remote control of the train traffic, VIII Scientific Conference „EF

2016”, Varna, 12-15.09.2016, Proceedings of Technical University of Sofia, ISSN 1311-0829, Volume

67, Issue 1, 2017, pр. 407-412

http://proceedings.tu-sofia.bg/volumes/Proceedings_volume_67_book_1_2017.pdf

Abstract: An analysis of the specific characteristics of the systems for control and management of

objects in railway transport is made in this paper. The structure, functions and equipment, which should

be implemented in a system for remote control and monitoring of train movements, are specified. Systems


7

for remote control and management based on existing systems for local control on facilities could also be

built on the same principle.

G8.10. Dimitrova Е., Software architecture of a system for remote control of the train traffic, VIII

Scientific Conference „EF 2016”, Varna, 12-15.09.2016, Proceedings of Technical University of Sofia,

ISSN 1311-0829, Volume 67, Issue 1, 2017, pр. 407-412


Abstract: Functions and main tasks of the system for remote control of the train traffic are defined in

this paper. Requirements and functions of the software are also specified, and the software architecture is

synthesized based on them. Opportunities to ensure high reliability are specified.

G8.11. Kolev N., Е. Dimitrovа, Non-traditional distribution laws used in communication and

information systems data processing, ХХIII International Scientific Conference „Transport-2017”, Acad.

Journal „Mechanics, Transport, Communications“, ISSN 1312-3823, Vol. 15, Issue 3, 2017, Art. № 1522,

pр. ХI-13 – ХI-18; https://mtc-aj.com/library/1522.pdf

Abstract: An important accent in the technical exploitation of communication systems is the study of

the distribution of estimates of the basic and secondary parameters measured. This is determined by the

technical feasibility for measurement through parameters with the appropriate measuring and recovery

tools. As a result, the average value of the parameter estimates appears to be a function of the duration or

period of technical exploitation. Similarly to this process, dispersion measurement estimates and the

medium quadratic deviation appear to be a function of the period of technical exploitation. The current

paper contains a study of the actual operational distribution of receiver sensitivity and transmitter power

of the ALAN communication and information system. Control measurements show that, as a result of the

inevitable wearing out process, the current values of the communication system parameters are

continuously changing around a certain average value in a cross section of time. The conclusion is that the

parameters checked are functions of the technical operation time. Due to analogous processes in the

measuring instruments used to control the relevant PTC, the dispersion of the relative error in each periodic

series of control measurements, as well as the medium quadratic deviation, appear to be functions of the

current operation time. In the above context, this paper is a study of the distribution of specific

communication system data in a cross-section of the current time for technical exploitation.

G8.12. Cherneva G., E. Dimitrova, Research of the dynamics of transport systems at impact of

stochastic disturbances, IХ International Scientific Conference “BulTrans-2017”, Sozopol, Bulgaria, 11-

13.09.2017, Proceedings, ISSN 1313-955X, pp. 107-111 ;

http://www.bultrans.org/files/proceedings/bultrans-2017.pdf

Abstract: The Transport systems are non-linear dynamic systems that obey the general rules and

fundamental laws that are inherent in all complex systems, regardless of their nature and individuality.

This concept is developed and substantiated by science Synergy. The Transport systems considered in a

synergic aspect are dynamic systems in which order and chaos parallelly exist. They are subjected to a

number of internal and external disturbances caused by random factors. These disturbances lead to

fluctuations that can bring the system from one state to another. Thus, it is gradually getting to self-

organizing and complicating the structure of the system in order to perform new functions. In the present

article, the dynamics of a transport system as a result of random disturbances is investigated based on its

modelling through the theory of non-linear dynamics.

G8.13. Dimitrova E., S. Stefanov, Optimization of systems for positioning and navigation of transport

vehicles, International Scientific Conference “Transport-2019”, 3-5.Х.2019, Acad. Journal „Mechanics,

Transport, Communications“, ISSN 1312-3823, Vol. 17, Issue 3/3, 2019, рр. ХI-8 – ХI-13, Art. № 1885


Abstract: The Global Positioning System (GPS) provides information about location, speed and time

that is used by many applications. Practically, all kinds of transport, telecommunications, energy-related



8

and other areas of the economy use satellite navigation systems today to determine coordinates, to

synchronize hours, to organize monitoring and to manage objects. The importance of satellite systems is

growing with the wider needs of networks and the growing need for users’ mobility. There are many

advantages of satellite navigation - they have a high degree of physical reliability, they are independent of

the Earth's infrastructure, they provide a distribution of loads and offer solutions for significant volumes

of information on large areas.

In this paper, three types of GPS receivers have been tested to illustrate and give a realistic picture of

the accuracy and reliability of certain products. This can contribute to specific solutions for the

optimization of positioning systems in the transport.

G8.14. Dimitrovа Е., Development of a video surveillance system in objects with high degree of

protection, ХХIII International Scientific Conference „Transport-2017”, Acad. Journal „Mechanics,

Transport, Communications“, ISSN 1312-3823, Vol. 15, Issue 3, 2017, Art. № 1478, pр. ХI-34 – ХI-38;


Abstract: The implementing of a Video Surveillance Systems (VSS) in the controlled objects provides

more reliable and secure protection around a wide range of subobjects and is often used in the security

systems in objects with special functions. The purpose of VSS is remote real time monitoring of the

objects, as well as video images recording in the control center. In this paper, a methodology of design

and implementing a VSS is proposed. The basic parameters and characteristics at cameras selecting and

specific requirements at video surveillance of objects with special functions are shown. The camera

locations are made on the previously developed site plan of the object. The software IP Video System

Desing Tool is used to determine the number of video cameras required and their location.

G8.15. Dimitrovа Е., Analysis of the opportunities for integration of video surveillance in the remote

monitoring and control systems, ХХIII International Scientific Conference „Transport-2017”, Acad.

Journal „Mechanics, Transport, Communications“, ISSN 1312-3823, Vol. 15, Issue 3, 2017, Art. № 1521,

pр. ХI-7 – ХI-12; https://mtc-aj.com/library/1521.pdf

Abstract: Video Surveillance Systems (VSS) offer practically the highest degree of security and

protection. Their purpose is real time monitoring and video images recording from cameras in the objects,

as well as transferring the information to the control center, thereby a more reliable and secure protection

around a wide range of objects, including those with a high degree of security, is built – it protects against

trespassers, vandals, and unauthorized individuals entering restricted areas, captures incidents, allows

remote video surveillance (on a computer, mobile devices, etc.). In this paper the principles of

development of VSS and the possibilities of their integration into remote monitoring and control systems

of complex technical sites and those with a high degree of protection are considered. The use of existing

OTN-type data transmission networks also offers the following advantages: long distances, redundancy,

multi-vendor video integration, cost effective, any type of video equipment and their proprietary protocols

can be connected directly to the network.

G8.16. Dimitrova E., N. Kolev, Reliability and accuracy of the measuring equipment and optimization

in video surveillance systems. IV International Scientific Conference „TEIT 2018”, Bansko, 28-

30.09.2018, Acad. Journal „Mechanics, Transport, Communications“, ISSN 1312-3823, Vol. 16, Issue

3/2, 2018, Art. № 1736, рр. XI-33 – XI-38; https://mtc-aj.com/library/1736.pdf

Abstract: The report considers the reliability, accuracy and optimization of the technological

equipment of a video surveillance system. Metrological reliability of the video surveillance system,

determined by gradual failures is introduced, i.e. by the probability that the relative error of the main

system parameters is within the limits of the allowable values representing the function of the time for the

technical operation. The metrological characteristics of measuring devices and video surveillance systems

change during in the exploitation process. Practical studies and measurements in the operation of video

surveillance systems show that metrological failures predominate significantly against nonmetrological

ones. This fact demonstrates the need and the problem of optimization, improvement and development of

special measures to predict and detect these metrological failures. The ability of measuring systems to

maintain set values over a certain time interval, operating conditions and different process modes




9

determines their metrological reliability. The report examines and analyses the types of failures in video

surveillance systems, apparatus for determining the technical condition of measuring devices and the

network is presented, research results are shown in order to optimize the operation of a video surveillance

system. Means and methods for control equipment status are shown using a virtual spectral analyser and

other appropriate equipment.

G8.17. Dimitrova E., P. Atanasov, Development of a concept to reduce the risk at protection of objects

with high degree of security, IX Scientific Conference „EF 2017”, Varna, 11-14.09.2017, Proceedings of

Technical University of Sofia, ISSN 1311-0829, Volume 68, Issue 1, 2018, pр. 351-358;


Abstract: In this paper, a methodology for risk assessment at the protection of objects and sites with a

high level of security is developed. A concept for the selection and implementation of alarm systems and

criteria for selecting peripheral elements and devices - sensor barriers, access control systems, and volume

detectors is proposed. The basic technical parameters for the selection of alarm stations, as well as the

integration of appropriate video surveillance systems are also given. Strategies and models are

systematized that can be used to develop security systems and enhance security at the site protection.

G8.18. Dimitrovа Е., V. Nachev, Classifier of the track circuit condition through the adaptive

processing of signals, International Conference „Аutomatics and Informatics '2018”, Sofia, October 4 - 6,

2018, Proceedings, ISSN 1313-1850, pр. 135-138

Abstract: Disadvantages of the standard track circuits and their relatively small length leads to the

need to develop new control methods, the use of which will lead to a significant increase in the reliability

of the information to control the rolling stock location and the integrity of the track, as well as to the

reliability of the management systems generally. The perspective is in the adaptive rail chains, which work

on the basis of classifier of the track circuit condition. In the paper, a method for controlling the state of

the track with high operational reliability in the conditions of the effects of destabilizing factors in a wide

range taking into account the longitudinal asymmetry and the change in the resistance of the insulation is

synthesized.

G8.19. Stefanov S., E. Dimitrova, Features of transport positioning systems in real time. IV

International Scientific Conference „TEIT 2018”, Bansko, 28-30.09.2018, Acad. Journal „Mechanics,

Transport, Communications“, ISSN 1312-3823, Vol. 16, Issue 3/2, 2018, pр. XI-15 – XI-20, Art. № 1733;


Abstract: In the paper, basic technologies to identify and determine the location of an object in real-

time mode in a particular area are analyzed. These technologies can be divided into three main groups:

RFID - Radio Frequency IDentification. These are systems for an automatic identification of objects in

which data stored in the so-called transponders or RFID labels is read or recorded by means of a radio

signal;

RTLS - Real-time Locating Systems - real-time positioning systems. This is an automated system

providing identification, determining coordinates, map display of the locations of the monitored objects

in a given territory. RTLS collects, processes and stores location and transport information for the purpose

of monitoring and signaling for diversion from a route, as well as for analyzing some situations. RTLS is

a second-generation RFID technology;

IPS - Indoor Positioning System - internal positioning system. These real-time local positioning

systems are based on mobile devices (smartphones). The use of these systems is necessary because more

and more customers are using mobile phones to navigate and receive real-time location services.

These three technologies are embedded in the contemporary positioning tools and contribute to the

qualitative determination of the position of the vehicles.

G8.20. E. Dimitrova, B. Rozev, Features in the design and construction of optical networks in railway

transport. IV International Scientific Conference „TEIT 2018”, Bansko, 28-30.09.2018, Acad. Journal


10

„Mechanics, Transport, Communications“, ISSN 1312-3823, Vol. 16, Issue 3/2, 2018, Art. № 1731,

pр.XI-1 – XI-7; https://mtc-aj.com/library/1731.pdf

Abstract: The main purpose of a newly built telecommunication system is to meet the increased

requirements of rail transport to service trains in accordance with ERTMS / ETCS. Optical cables can

meet these requirements and offer a number of advantages over copper coaxial cables: they provide the

ability to transfer large data packets with significantly lower losses over unmatched long distances; their

price is significantly lower and at the same time they are lighter; they are actually free from external

disturbances; the reliability and security of the optical line are increased, the risk during operation is

reduced, which means that the cost of laying and future problems on the line decrease significantly. The

report presents rules for the design of optical networks. Particular features for the construction and laying

of underground optical cable lines in non-grid sections, as well as for the construction of aerial optical

cable lines are shown. The requirements for entering the route to the stations in a telecommunication unit

through server premises are considered, the stages of commissioning of the line and the necessary

measurements and reflexes are presented. These features are an integral part of the requirements for the

realization and construction of the optical line.

G8.21. Nachev V., Е. Dimitrovа, Computer model for determining the parameters of track circuits, III

International Conference „Аutomatics and Informatics '2018”, Sofia, October 4 - 6, 2018, Proceedings,

ISSN 1313-1850, pр. 139-142

Abstract: In the paper, a track line model that enables the reporting of the presence of transverse and

longitudinal asymmetry is presented. It is versatile because it demonstrates a set of matrices for rail track

parameters that allow for flexible change of replacement schemes depending on track configuration and

operating modes as well as analysis of all types of rail circuits (analysis of voltage, current and phase

variation in each section of the track, determination of the field of existence of the electrical parameters

of the track multipolar in each state and the impact of destabilizing factors). The proposed algorithm with

mathematical and computer model for determining the parameters of the track circuits can improve their

operation and will contribute to proper functioning in the conditions of degraded shunt sensitivity.

G8.22. Ivanov I., E. Dimitrova, Analysis of the types of European legal entities in benefit of

environmental and rational innovative investment process for international energy, transport and

infrastructure projects' development and their practical implementation, International Scientific

Conference ‘High Technologies. Business. Society 2018”, 12-15.03.2018, Borovets, Bulgaria,

Plenary Session, International Scientific Journal “Industry 4.0”, ISSN 2534-8582, 1/2018, pp. 50-53 ;

https://stumejournals.com/journals/i4/2018/1/50

Abstract: A high level of investment is needed for international transport and infrastructure projects

for the development of the subway, as well for implementation of a train management operational system

to meet ERTMS / ETCS requirements along major railway corridors. All cases need a multi-source

approach of financing from different sources, having the European funds as a main component. Each such

project must be undoubtable innovative and in accordance with European requirements for safety, risk

reduction and environmental protection. In favour of this the report presents the main types of European

Legal Entities with their advantages, disadvantages, intellectual property rights (IPR), etc. Choose of the

most appropriate type of legal entity for realisation of such project has very high priority in the whole

investment process.

G8.23. Dimitrov V., E. Dimitrova, Development of SCADA system for energy process monitoring

and control in business center – selection of elements and devices, IX Scientific Conference „EF 2017”,

Varna, 11-14.09.2017, Proceedings of Technical University of Sofia, ISSN 1311-0829, Volume 68, Issue

1, 2018, pр. 325-332; http://proceedings.tu-sofia.bg/volumes/Proceedings_volume_68_book_1_2018.pdf

Abstract: In this paper, the principles of design and construction of a SCADA system for monitoring

of the energy processes and control of objects and electrical devices in a modern business center are

examined. Such systems provide the appropriate micro-climate in the building, stable power supply and

increase energy efficiency. Functions are defined and all necessary measurement and control devices are


https://stumejournals.com/journals/i4/2018/1/50

11

specified. Contemporary components developed by Siemens are involved. Some possibilities of control

on devices in the building by the dispatcher are shown. The developed methodology can be applied at

design and setup of such systems in different fields of industry and building automation.

G8.24. Dimitrova E., GPS dispatch system for monitoring and control in automobile transport,

International Conference „Automatics and Informatics 2019“, 3-5.Х.2019, Sofia, SAI-John Atanasoff

Society of Automatics and Informatics, Proceedings, ISBN 1313-1850, pp.61-64

Abstract: A GPS dispatching system for monitoring and managing of transport vehicles has been

developed. It is reliable, easy to use, offers a wide range of features that can be used to optimize financial

costs. It increases the productivity and efficiency of work, reduces fuel costs and eliminates abuses. It is

available in different variants depending on the investments available. Varied modules can be added and

security, navigation and driver monitoring can be ensured.

G8.25. Dimitrova E., S. Stefanov, Application of satellite navigation in the management of railway

transport, IV International Scientific Conference „UniTech-2019", Gabrovo, 14–16.11.2019, Proceedings,

ISSN 1313-230X, Vol. 1, pp. 1-347 – 1-352; http://unitech.tugab.bg/index.php

Abstract: Navigation systems have evolved rapidly in recent years, along with developments in other

fields of science and technology. The navigation instruments are becoming more widespread in many

areas of the economy due to the development of contemporary measuring and computing technologies

and information measuring systems. The implementation of navigation systems in the management of

vehicles and the development of multimodality, which is based on the use of GLONASS/GPS systems,

lead to the creation and development of the so called intelligent transport systems. In this paper, the

application of navigation technologies in the railway transport is considered.

G8.26. Dimitrova E., B. Rozev, Peculiarities in design and construction of optical GPON networks,

International Scientific Conference „Transport 2019”, 3-5.Х.2019, Acad. Journal „Mechanics,

Transport, Communications“, ISSN 1312-3823, Vol. 17, Issue 3/3, 2019, рр. ХI-21 – ХI-27

Art. № 1887, https://mtc-aj.com/library/1887.pdf

Abstract: GPON (Gigabit Passive Optical Network) networks are a relatively new technology, but

they are increasingly used in the construction of optical networks: both short-range networks and networks

about 50 km away. GPON is a point-to-multipoint network architecture that provides home optical

connectivity and uses powered optical splitters through which signals are delivered on a single fiber to

many private homes and office spaces. The passive test network contains an Optical Line Termination

Device (OLT) located in the provider's central office and a number of optical networking devices (ONUs)

installed close to end customers. The GPON configuration reduces the number of optics and central

equipment required for point-to-point architectures. A feature of GPON networks is the use of WDM to

provide full duplex operation on a single fiber. Customer data is assumed to be transmitted at 1310 nm

and in the opposite direction to 1490 nm. A wavelength of 1550 nm is sometimes used to transmit data to

the customer when providing an additional service. The paper presents the rules for designing a GPON

optical network, examines the requirements for using only fiber optic cable and passive components such

as splitters and couplers, without amplifiers, repeaters, and more. The value of these networks is

significantly lower than those using active components.

G8.27. Dimitrova E., B. Rozev, Optical service provision network Triple-Play, IVth International

Scientific Conference „UniTech-2019", Gabrovo, 14–16.11.2019, Proceedings, ISSN 1313-230X, Vol. 1,

pp. 1-342 – 1-346; http://unitech.tugab.bg/index.php

Abstract: The ongoing development of telecommunications services is a mobile factor for the Internet

service provider that provides widespread services such as Broadband Internet, Voice over IP, Video on

Demand and IPTV.

Delivering the services of the right quality is vital for all operators, and the ever-evolving technologies

are placing an increasing emphasis on environmental transfer and subscriber access technologies.

http://unitech.tugab.bg/index.php


http://unitech.tugab.bg/index.php

12

Thanks to modern methods, using the necessary quality of service, IP based networks offer the

opportunity to integrate services such as voice, video and high-speed Internet on a single transmission

platform.

Defined by ITU-T and IEEE standards for APON, BPON, EPON and GPON, optimized technologies

in the access network can be implemented in different ways. The passive optical network PON enters near

the home of subscribers. It uses cheap passive optical splitters for distribution of signals. The combination

of PON optical technology with electronic version as a method of using an affordable EPON network is

suitable for simultaneous provision of multiple broadband services.

The purpose of this paper is to explore the FTTx network topologies, namely point-to-point and point-

to-multipoint, as well as to analyze the features provided by Triple play.

III. Indicator E23: University textbooks

Е23.1. Goranov Е., Е. Dimitrova, Systems for Remote Monitoring and Control in Transport,

ISВN 978-954-12-0177-0, Sofia, University of transport, 2010

The textbook is written in accordance with the curriculum of the compulsory course "Systems for

Remote Monitoring and Control in Transport”, programme “Telecommunicatin and Signalling” at Todor

Kableshkov University of Transport – Sofia. It can also be used by students from other electrotechnical

specialties as well as by specialists from Metropolitan EAD and National railway infrastructure company.

The main objective is to develop knowledge in the field of dispersed object control. The basic

principles and methods for the construction of systems for remote monitoring and operational management

in transport and energy are given. Different types of systems put into operation at the National Railway

Infrastructure Company are considered. The basic principles involved in the construction of modern

SCADA systems in the Metropolitan are affected.

Е23.2. Ivanov Е., Е. Dimitrova, Automatic traffic control, ISВN 978-954-12-0223-4, Sofia,

University of transport, 2012

The textbook is intended for training in the discipline of the same name, studied by students in

programme “Telecommunicatin and Signalling” at Todor Kableshkov University of Transport – Sofia. It

is also useful for specialists and researchers in the field of signaling and communication in the railway and

subway.

The textbook presents the basic principles and means of positioning (track circuits and axle

counters), devices for inter-station automation, automatic locomotive signaling, automatic crossing

devices. The European Rail Traffic Management System ERTMS / ETCS and the GSM-R mobile

communications platform have been considered.

IV. Indicator E24: University manuals

Е24.1. Dimitrova Е., T. Simeonova, Manual for exercises on Risk Analysis and Management in

Telecommunications and Signalling, ISВN 978-954-12-0268-5, Sofia, University of transport, 2019

The manual has been developed for the course "Risk Analysis and Management", which is studied by

students in the programme "Telecommunications and Signalling" at the Todor Kableshkov University of

transport. It can be used in other technical higher education institutions.

The manual includes questions based on the lecture material related to the preliminary hazard analysis

and the analysis of the type of failure and its consequences; risk assessment through the failure tree

(including probabilistic estimation, including exponential probability distributions, as well as failure

components recovery); risk assessment through event tree and cause and effect analysis; methods for risk

13

analysis, assessment and management (individual risk, etc.) in railway communication and signalling

technology.

The manual includes a cycle of 7 formulations of risk studies and 5 explanatory annexes to them.

Е24.2. Ivanov Е., Е. Dimitrova, Fundamentals of Automatics - Manual for Exercises, ISВN 978-

954-8640-18-3, NAEET, Sofia, 2015

The manual is intended for students studying the basics of Automation and Telemechanics and

Management Theory. It is used as a teaching aid in conducting seminars and laboratory exercises. It can

also be used by graduates, PhD students and researchers working on the synthesis of control systems and

theory of digital automata.

The guide is structured in two sections. For each topic in the first section, the theoretical formulation

is presented, problems are developed and examples of control theory and theory of digital automata are

solved.

The second section includes seven laboratory exercises for the study of parameters, characteristics

and modes of operation of elements of signalling systems and equipment: testing of relays, sensors, throttle

transformers, road filters, temperature regulators. For each exercise, the goals and objectives are specified,

and a methodology for conducting it is developed. The measurement results obtained have to be completed

in the protocols developed for this purpose, annexed to the manual.

06.02.2020

/ Assoc. Prof. Dr. E. Dimitrova /

ABSTRACTS OF PAPERS of Assoc. Prof. Dr. Emiliya Andonova … · 2020. 4. 2. · Engineering Faculty...

Documents

Transcript of ABSTRACTS OF PAPERS of Assoc. Prof. Dr. Emiliya Andonova … · 2020. 4. 2. · Engineering Faculty...