1.
Petrova, G.; Spasov, G.; Iliev, I.
A Review on Applications of Low-resolution IR Array Sensors in Ambient-Assisted Living Conference
2021, ISBN: 9781665445184.
Abstract | Links | BibTeX | Етикети: cst, e
@conference{Petrova2021,
title = {A Review on Applications of Low-resolution IR Array Sensors in Ambient-Assisted Living},
author = {G. Petrova and G. Spasov and I. Iliev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119001857\&doi=10.1109%2fET52713.2021.9579477\&partnerID=40\&md5=efbd9ca279b727cda39d21f38b4dffee},
doi = {10.1109/ET52713.2021.9579477},
isbn = {9781665445184},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {2021 30th International Scientific Conference Electronics, ET 2021 - Proceedings},
abstract = {The present paper provides a review on applications of Low-resolution IR array sensors in Ambient-Assisted Living (AAL) monitoring systems. The review is focused on three main scenarios: indoor people detecting, localizing and counting; fall detection; indoor human activity detection and recognition. A comparative analysis of the reported results in the latest research studies has been carried out in terms of the type and position of the low-resolution IR array sensors used, the employed methods and image processing techniques and the achieved accuracy. The analysis shows that for fall detection and human activity recognition applications, the IR array sensors with 24times 32 pixels or multiple sensors arrangements with 4times 16, 16times 16 and 24times 32 pixels can provide sufficient accuracy and still preserving user privacy. © 2021 IEEE.},
keywords = {cst, e},
pubstate = {published},
tppubtype = {conference}
}
The present paper provides a review on applications of Low-resolution IR array sensors in Ambient-Assisted Living (AAL) monitoring systems. The review is focused on three main scenarios: indoor people detecting, localizing and counting; fall detection; indoor human activity detection and recognition. A comparative analysis of the reported results in the latest research studies has been carried out in terms of the type and position of the low-resolution IR array sensors used, the employed methods and image processing techniques and the achieved accuracy. The analysis shows that for fall detection and human activity recognition applications, the IR array sensors with 24times 32 pixels or multiple sensors arrangements with 4times 16, 16times 16 and 24times 32 pixels can provide sufficient accuracy and still preserving user privacy. © 2021 IEEE.
2.
Vuchev, A. S.; Grigorova, T. G.; Vuchev, S. A.
RMS Current Values in an LLC DC-DC Converter Operating above the Resonant Frequency Conference
2021, ISBN: 9781665445184.
Abstract | Links | BibTeX | Етикети: e
@conference{Vuchev2021,
title = {RMS Current Values in an LLC DC-DC Converter Operating above the Resonant Frequency},
author = {A. S. Vuchev and T. G. Grigorova and S. A. Vuchev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119015851\&doi=10.1109%2fET52713.2021.9579989\&partnerID=40\&md5=4451972184cb26910ea5acd6e627391e},
doi = {10.1109/ET52713.2021.9579989},
isbn = {9781665445184},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {2021 30th International Scientific Conference Electronics, ET 2021 - Proceedings},
abstract = {An algorithm for calculating root mean square (RMS) values of the currents through the elements of a full bridge LLC DC-DC converter is presented. Equations obtained on the base of State Plane Analysis for operation above the resonant frequency are used. The influence of the tank inductances ratio and the operating frequency is investigated using graphical representation. Computer simulations are performed for verification of the theoretical results. © 2021 IEEE.},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
An algorithm for calculating root mean square (RMS) values of the currents through the elements of a full bridge LLC DC-DC converter is presented. Equations obtained on the base of State Plane Analysis for operation above the resonant frequency are used. The influence of the tank inductances ratio and the operating frequency is investigated using graphical representation. Computer simulations are performed for verification of the theoretical results. © 2021 IEEE.
3.
Ivanova, Y.; Ivanov, S.
Dv/Dt Control through the Gate of a Field-Effect Transistor in Forward-Mode Converters Conference
2021, ISBN: 9781665440615.
Abstract | Links | BibTeX | Етикети: e, ee
@conference{Ivanova2021,
title = {Dv/Dt Control through the Gate of a Field-Effect Transistor in Forward-Mode Converters},
author = {Y. Ivanova and S. Ivanov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114125968\&doi=10.1109%2fELECTRONICA52725.2021.9513730\&partnerID=40\&md5=ca046cc88e447a9e5653b1b7543a7aba},
doi = {10.1109/ELECTRONICA52725.2021.9513730},
isbn = {9781665440615},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {12th National Conference with International Participation, ELECTRONICA 2021 - Proceedings},
abstract = {An important condition for increasing the efficiency of pulse converters is the reduction of active power losses on switch transistors during transients. In addition to reducing the duration of the on and off times, it is necessary to reduce the amplitude values of the currents and voltages of the switch transistor. This paper presents a study of the transients in the control of a forward pulsed voltage stabilizer. A comparative analysis was made between control of the switch transistor with a conventional and with an active driver with feedback on the derivative of drain voltage. The electromagnetic compatibility of the pulse converter is improved by reducing the maximum values of currents and voltages as well as the duration of the transients. © 2021 IEEE.},
keywords = {e, ee},
pubstate = {published},
tppubtype = {conference}
}
An important condition for increasing the efficiency of pulse converters is the reduction of active power losses on switch transistors during transients. In addition to reducing the duration of the on and off times, it is necessary to reduce the amplitude values of the currents and voltages of the switch transistor. This paper presents a study of the transients in the control of a forward pulsed voltage stabilizer. A comparative analysis was made between control of the switch transistor with a conventional and with an active driver with feedback on the derivative of drain voltage. The electromagnetic compatibility of the pulse converter is improved by reducing the maximum values of currents and voltages as well as the duration of the transients. © 2021 IEEE.
4.
Ivanov, S. C.; Ivanova, Y. N.
Optimization of switching performance of power MOSFET with active driver with dv/dt feedback Conference
2021, ISBN: 9781665435826.
Abstract | Links | BibTeX | Етикети: e, ee
@conference{Ivanov2021,
title = {Optimization of switching performance of power MOSFET with active driver with dv/dt feedback},
author = {S. C. Ivanov and Y. N. Ivanova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114912001\&doi=10.1109%2fELMA52514.2021.9503078\&partnerID=40\&md5=e0e4c86858ded19b24128a2dafcd4726},
doi = {10.1109/ELMA52514.2021.9503078},
isbn = {9781665435826},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {2021 17th Conference on Electrical Machines, Drives and Power Systems, ELMA 2021 - Proceedings},
abstract = {Using an active driver with feedback on a derivative of drain voltage dv/dt to reduce high-order harmonic frequencies and reduce active losses in MOSFET control is researched and analyzed in this paper. Studies have been performed in the control of R-L load and supply voltage 12V. A comparison is made between the exponential change of the current through the load in controlling with a standard driver and change of current when driving with active driver. The article found that the active driver reduces the active power losses on the transistor. The studied active driver is suitable for control of DC-DC converters operating by the method of pulse-width modulation. © 2021 IEEE.},
keywords = {e, ee},
pubstate = {published},
tppubtype = {conference}
}
Using an active driver with feedback on a derivative of drain voltage dv/dt to reduce high-order harmonic frequencies and reduce active losses in MOSFET control is researched and analyzed in this paper. Studies have been performed in the control of R-L load and supply voltage 12V. A comparison is made between the exponential change of the current through the load in controlling with a standard driver and change of current when driving with active driver. The article found that the active driver reduces the active power losses on the transistor. The studied active driver is suitable for control of DC-DC converters operating by the method of pulse-width modulation. © 2021 IEEE.
5.
Pavlova, P. E.; Pachedjieva, B. K.
Investigation on the possibilities of tracking dynamic visibility changes in images Conference
2021, ISBN: 9781665445184.
Abstract | Links | BibTeX | Етикети: cst, e
@conference{Pavlova2021,
title = {Investigation on the possibilities of tracking dynamic visibility changes in images},
author = {P. E. Pavlova and B. K. Pachedjieva},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119019255\&doi=10.1109%2fET52713.2021.9579821\&partnerID=40\&md5=9d42a6b86968d3572ac0584339836ac7},
doi = {10.1109/ET52713.2021.9579821},
isbn = {9781665445184},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {2021 30th International Scientific Conference Electronics, ET 2021 - Proceedings},
abstract = {This material describes a methodology for tracking the dynamics of weather phenomena in computer images. The investigation is based on parameters used in the currently available techniques for determination of fog, rain, snow and sun. The developed methodology relies on the, mean value, dispersion and correlated color temperature by processing the dark prior channel of colored images. Tracking is done for a set of data derived from restricted fields with different positioning in one image. The occurrence of an event is analysed on in sequences of images obtained in different weather phenomenon. The research is aimed at improving the processing of images at monitoring traffic. © 2021 IEEE.},
keywords = {cst, e},
pubstate = {published},
tppubtype = {conference}
}
This material describes a methodology for tracking the dynamics of weather phenomena in computer images. The investigation is based on parameters used in the currently available techniques for determination of fog, rain, snow and sun. The developed methodology relies on the, mean value, dispersion and correlated color temperature by processing the dark prior channel of colored images. Tracking is done for a set of data derived from restricted fields with different positioning in one image. The occurrence of an event is analysed on in sequences of images obtained in different weather phenomenon. The research is aimed at improving the processing of images at monitoring traffic. © 2021 IEEE.
6.
Grigorova, T.; Vuchev, A.; Vuchev, S.
A Design Methodology for an LLC DC-DC Converter Operating above the Resonant Frequency Conference
2021, ISBN: 9781665445184.
Abstract | Links | BibTeX | Етикети: e
@conference{Grigorova2021,
title = {A Design Methodology for an LLC DC-DC Converter Operating above the Resonant Frequency},
author = {T. Grigorova and A. Vuchev and S. Vuchev},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118987427\&doi=10.1109%2fET52713.2021.9579695\&partnerID=40\&md5=bfa9f257b5b45f191c7b38e8d25dbd57},
doi = {10.1109/ET52713.2021.9579695},
isbn = {9781665445184},
year = {2021},
date = {2021-01-01},
urldate = {2021-01-01},
journal = {2021 30th International Scientific Conference Electronics, ET 2021 - Proceedings},
abstract = {This paper discusses an accurate design methodology for an LLC DC-DC converter based on a precise analysis of the electromagnetic processes in the circuit using State Plane Analysis. The converter operates above the resonant frequency, and frequency control is applied to regulate the output power. Based on the obtained analytical dependences and expressions for the quantities on which the choice of the main circuit elements depends, a full-bridge LLC DC-DC converter was designed and simulated. The accuracy of the obtained results is very high (error of 1-2%). © 2021 IEEE.},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
This paper discusses an accurate design methodology for an LLC DC-DC converter based on a precise analysis of the electromagnetic processes in the circuit using State Plane Analysis. The converter operates above the resonant frequency, and frequency control is applied to regulate the output power. Based on the obtained analytical dependences and expressions for the quantities on which the choice of the main circuit elements depends, a full-bridge LLC DC-DC converter was designed and simulated. The accuracy of the obtained results is very high (error of 1-2%). © 2021 IEEE.
7.
Pavlova, P E; Pachedjieva, B K
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728174266, (cited By 0).
Abstract | Links | BibTeX | Етикети: cst, e
@conference{Pavlova2020,
title = {Methodology for numerical assessments of the quality of cloud fields images used in time mutability method},
author = {P E Pavlova and B K Pachedjieva},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097077784\&doi=10.1109%2fET50336.2020.9238283\&partnerID=40\&md5=3a7c42178bcd4270b32024f9fd51e79c},
doi = {10.1109/ET50336.2020.9238283},
isbn = {9781728174266},
year = {2020},
date = {2020-01-01},
journal = {2020 29th International Scientific Conference Electronics, ET 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The methodology described below supports the time mutability method for estimating cloud drift velocity. A technique for determination numerical values of the contrast and impulse noise level in images of cloud fields is presented. The contrast for the entire image and the level of the impulse noise for the entire image and in addition-in angular directions have been calculated in accordance with the method for drift velocity estimation. The evaluations have been realized by special developed software modules. © 2020 IEEE.},
note = {cited By 0},
keywords = {cst, e},
pubstate = {published},
tppubtype = {conference}
}
The methodology described below supports the time mutability method for estimating cloud drift velocity. A technique for determination numerical values of the contrast and impulse noise level in images of cloud fields is presented. The contrast for the entire image and the level of the impulse noise for the entire image and in addition-in angular directions have been calculated in accordance with the method for drift velocity estimation. The evaluations have been realized by special developed software modules. © 2020 IEEE.
8.
Pachedjieva, B K; Pavlova, P E
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728174266, (cited By 0).
Abstract | Links | BibTeX | Етикети: cst, e
@conference{Pachedjieva2020,
title = {Stochastic objects velocity estimation using Modified Time Mutability Method, based on two-dimensional images},
author = {B K Pachedjieva and P E Pavlova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097062584\&doi=10.1109%2fET50336.2020.9238177\&partnerID=40\&md5=5c643c35c3c2cdc7dc22e5d166f958ce},
doi = {10.1109/ET50336.2020.9238177},
isbn = {9781728174266},
year = {2020},
date = {2020-01-01},
journal = {2020 29th International Scientific Conference Electronics, ET 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The time mutability method allows estimation of drift velocity of stochastic objects basing on sequences of their images. A procedure for constructing and selecting rotational radial-sections from two-dimensional images through which a velocity field can be constructed is proposed. The constructed sections are applied to determine the velocity field of a cloud field based on a series of its two-dimensional images. Numerical examples, illustrated by graphic material, have been shown. © 2020 IEEE.},
note = {cited By 0},
keywords = {cst, e},
pubstate = {published},
tppubtype = {conference}
}
The time mutability method allows estimation of drift velocity of stochastic objects basing on sequences of their images. A procedure for constructing and selecting rotational radial-sections from two-dimensional images through which a velocity field can be constructed is proposed. The constructed sections are applied to determine the velocity field of a cloud field based on a series of its two-dimensional images. Numerical examples, illustrated by graphic material, have been shown. © 2020 IEEE.
9.
Tsvetkov, V; Spasov, G; Petrova, G
IoT solution for monitoring of data in the visible and infrared spectrum Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728174266, (cited By 0).
Abstract | Links | BibTeX | Етикети: cst, e
@conference{Tsvetkov2020,
title = {IoT solution for monitoring of data in the visible and infrared spectrum},
author = {V Tsvetkov and G Spasov and G Petrova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097105673\&doi=10.1109%2fET50336.2020.9238289\&partnerID=40\&md5=d82b7d4199384b330e7f8dee1c7aca2f},
doi = {10.1109/ET50336.2020.9238289},
isbn = {9781728174266},
year = {2020},
date = {2020-01-01},
journal = {2020 29th International Scientific Conference Electronics, ET 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {In this paper a cost-effective combination between infrared and visible camera for thermal imaging applicable in Ambient Assisted Living (AAL) and object monitoring in smart homes is presented and demonstrated. In recent years, we have witnessed a rapid surge in assisted living technologies. Internet of Things (IoT) is a platform where every day devices become smarter, everyday processing becomes intelligent, and every day communication becomes informative. Our implementation is based on four layers IoT architecture. The user interface provides an option for manual adjustment of the image alignment from infrared and visible cameras. Apart from manual procedure, a procedure for the automatic alignment of the images of the both cameras have been developed. The time necessary for the image data processing by the microcontroller which gathers data from the sensors or by the gateway device is estimated. © 2020 IEEE.},
note = {cited By 0},
keywords = {cst, e},
pubstate = {published},
tppubtype = {conference}
}
In this paper a cost-effective combination between infrared and visible camera for thermal imaging applicable in Ambient Assisted Living (AAL) and object monitoring in smart homes is presented and demonstrated. In recent years, we have witnessed a rapid surge in assisted living technologies. Internet of Things (IoT) is a platform where every day devices become smarter, everyday processing becomes intelligent, and every day communication becomes informative. Our implementation is based on four layers IoT architecture. The user interface provides an option for manual adjustment of the image alignment from infrared and visible cameras. Apart from manual procedure, a procedure for the automatic alignment of the images of the both cameras have been developed. The time necessary for the image data processing by the microcontroller which gathers data from the sensors or by the gateway device is estimated. © 2020 IEEE.
10.
Pazhev, G; Spasov, G; Shopov, M; Petrova, G
On the use of blockchain technologies in smart home applications Conference
vol. 878, no. 1, Institute of Physics Publishing, 2020, ISSN: 17578981, (cited By 0).
Abstract | Links | BibTeX | Етикети: cst, e
@conference{Pazhev2020,
title = {On the use of blockchain technologies in smart home applications},
author = {G Pazhev and G Spasov and M Shopov and G Petrova},
editor = {Shakev Ahmed N S Nikolov V. Petrov M.},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85089004112\&doi=10.1088%2f1757-899X%2f878%2f1%2f012023\&partnerID=40\&md5=4e5341aa8ee1b31b85ef7d86d0a162cb},
doi = {10.1088/1757-899X/878/1/012023},
issn = {17578981},
year = {2020},
date = {2020-01-01},
journal = {IOP Conference Series: Materials Science and Engineering},
volume = {878},
number = {1},
publisher = {Institute of Physics Publishing},
abstract = {The paper presents an implementation of a smart home architecture with two gateways based on collaboration of blockchain technology and Internet of Things (IoT) Message oriented middleware (MOM) architecture for management of internal home appliances. A basic overview of IoT MOM, MQTT (Message Queue Telemetry Transfer) protocol and blockchain architectures is made and the key characteristics and consensus algorithms are presented. Some challenges and the Ethereum smart contracts concept of the blockchain technology are discussed. © 2020 IOP Publishing Ltd. All rights reserved.},
note = {cited By 0},
keywords = {cst, e},
pubstate = {published},
tppubtype = {conference}
}
The paper presents an implementation of a smart home architecture with two gateways based on collaboration of blockchain technology and Internet of Things (IoT) Message oriented middleware (MOM) architecture for management of internal home appliances. A basic overview of IoT MOM, MQTT (Message Queue Telemetry Transfer) protocol and blockchain architectures is made and the key characteristics and consensus algorithms are presented. Some challenges and the Ethereum smart contracts concept of the blockchain technology are discussed. © 2020 IOP Publishing Ltd. All rights reserved.
11.
Ivanov, S C; Ivanova, Y N
Reducing Energy Losses in Realising MOSFET Control by an Active du/dt Feedback Driver Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728103624, (cited By 0).
Abstract | Links | BibTeX | Етикети: e, ee
@conference{Ivanov2020b,
title = {Reducing Energy Losses in Realising MOSFET Control by an Active du/dt Feedback Driver},
author = {S C Ivanov and Y N Ivanova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099539049\&doi=10.1109%2fEEAE49144.2020.9279094\&partnerID=40\&md5=25bd0f89a2349680c3101fea86e033bc},
doi = {10.1109/EEAE49144.2020.9279094},
isbn = {9781728103624},
year = {2020},
date = {2020-01-01},
journal = {2020 7th International Conference on Energy Efficiency and Agricultural Engineering, EE and AE 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The paper presents a method and a device for active control of power transistors, operating in a switch mode. The achieved goals are related to reduction of the dynamic energy losses when controlling the key elements. The driver circuitry limits the electromagnetic radiation, eliminates the need of using RC protection groups and increases the operational reliability of power transistors. An analytical model of the studied driver scheme has been made and results from the conducted experimental studies during the MOSFET control have been given. A comparison with a commonly used driver scheme has been drawn up. © 2020 IEEE.},
note = {cited By 0},
keywords = {e, ee},
pubstate = {published},
tppubtype = {conference}
}
The paper presents a method and a device for active control of power transistors, operating in a switch mode. The achieved goals are related to reduction of the dynamic energy losses when controlling the key elements. The driver circuitry limits the electromagnetic radiation, eliminates the need of using RC protection groups and increases the operational reliability of power transistors. An analytical model of the studied driver scheme has been made and results from the conducted experimental studies during the MOSFET control have been given. A comparison with a commonly used driver scheme has been drawn up. © 2020 IEEE.
12.
Ivanova, Y; Ivanov, S; Vasileva, E; Nyagolov, D
Control of impulse converter with reverse energy transmission with active driver circuit Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728175317, (cited By 0).
Abstract | Links | BibTeX | Етикети: e, ee
@conference{Ivanova2020b,
title = {Control of impulse converter with reverse energy transmission with active driver circuit},
author = {Y Ivanova and S Ivanov and E Vasileva and D Nyagolov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099883323\&doi=10.1109%2fELECTRONICA50406.2020.9305097\&partnerID=40\&md5=57dadb2206fb3d6dc10bce3cb678c6b8},
doi = {10.1109/ELECTRONICA50406.2020.9305097},
isbn = {9781728175317},
year = {2020},
date = {2020-01-01},
journal = {11th National Conference with International Participation, ELECTRONICA 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {This paper presents research of an active driver circuit with dv/dt feedback, included in the control system of a converter with reverse power transmission. A comparative analysis of the transients in the power circuit when controlling the power transistor with conventional and active driver is made. The impact of the active driver circuit on the frequency and attenuation of the resonant processes during the switching of the power transistor has been researched. Conclusions are made about the power losses, the amplitude values of the voltages and the electromagnetic radiation of the converter. © 2020 IEEE.},
note = {cited By 0},
keywords = {e, ee},
pubstate = {published},
tppubtype = {conference}
}
This paper presents research of an active driver circuit with dv/dt feedback, included in the control system of a converter with reverse power transmission. A comparative analysis of the transients in the power circuit when controlling the power transistor with conventional and active driver is made. The impact of the active driver circuit on the frequency and attenuation of the resonant processes during the switching of the power transistor has been researched. Conclusions are made about the power losses, the amplitude values of the voltages and the electromagnetic radiation of the converter. © 2020 IEEE.
13.
Petrov, B B
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728187174, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Petrov202082,
title = {Using of Bfloat16 Format in Deep Learning Embedded Accelerators based on FPGA with Limited Quantity of Dedicated Multipliers},
author = {B B Petrov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099462094\&doi=10.1109%2fTELECOM50385.2020.9299565\&partnerID=40\&md5=d336c217147b423dc5f7d1fa57e0d589},
doi = {10.1109/TELECOM50385.2020.9299565},
isbn = {9781728187174},
year = {2020},
date = {2020-01-01},
journal = {28th National Conference with International Participation, TELECOM 2020 - Proceedings},
pages = {82-85},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The hardware base of Deep Learning Neural Network (DLNN) realization methods are remote cloud services, Graphical Processing Units (GPU) and Field Programmable Gate Arrays (FPGA). The one of the main differences between FPGA devices is important for DLNN realization is quantity of dedicated multipliers in DSP blocks. In this article a method for optimization based on bfloat16 data format useful for FPGA devices with small quantities of DSP blocks is described. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
The hardware base of Deep Learning Neural Network (DLNN) realization methods are remote cloud services, Graphical Processing Units (GPU) and Field Programmable Gate Arrays (FPGA). The one of the main differences between FPGA devices is important for DLNN realization is quantity of dedicated multipliers in DSP blocks. In this article a method for optimization based on bfloat16 data format useful for FPGA devices with small quantities of DSP blocks is described. © 2020 IEEE.
14.
Petrov, B B
Using of Integrated Daemon Module for Internal Processing Cells Addressing in Systolic Architecture Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728174266, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Petrov2020c,
title = {Using of Integrated Daemon Module for Internal Processing Cells Addressing in Systolic Architecture},
author = {B B Petrov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097041022\&doi=10.1109%2fET50336.2020.9238281\&partnerID=40\&md5=eac6befd2f9ee6124a0fb693a96c8963},
doi = {10.1109/ET50336.2020.9238281},
isbn = {9781728174266},
year = {2020},
date = {2020-01-01},
journal = {2020 29th International Scientific Conference Electronics, ET 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {FPGA programmable logic devices make it possible to implement known and synthesize new architectures with many applications. Increasingly, these implementations are based on systolic array that combine very good capabilities and features. The article discusses a method for shortening additional resource for change of a specific parametric value in a given computing element of the systolic architecture by embedding a small single-register module in each cell. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
FPGA programmable logic devices make it possible to implement known and synthesize new architectures with many applications. Increasingly, these implementations are based on systolic array that combine very good capabilities and features. The article discusses a method for shortening additional resource for change of a specific parametric value in a given computing element of the systolic architecture by embedding a small single-register module in each cell. © 2020 IEEE.
15.
Yakimov, P I; Asparuhova, K K; Grigorova, T G; Shehova, D A
Industry 4.0 and the Challenges Faced by STEM Education Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728174266, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Yakimov2020,
title = {Industry 4.0 and the Challenges Faced by STEM Education},
author = {P I Yakimov and K K Asparuhova and T G Grigorova and D A Shehova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097051210\&doi=10.1109%2fET50336.2020.9238223\&partnerID=40\&md5=71ab25c881f4a10b43e47bfa9b6f83a6},
doi = {10.1109/ET50336.2020.9238223},
isbn = {9781728174266},
year = {2020},
date = {2020-01-01},
journal = {2020 29th International Scientific Conference Electronics, ET 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The paper surveys the main factors supporting the implementation of the paradigm Industry 4.0. Their basic characteristics which represent challenges in front of the STEM education are considered. Some tasks faced by the industrial automation engineers are taken into account. A possible correspondence between the required skills and the taught subjects is presented. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
The paper surveys the main factors supporting the implementation of the paradigm Industry 4.0. Their basic characteristics which represent challenges in front of the STEM education are considered. Some tasks faced by the industrial automation engineers are taken into account. A possible correspondence between the required skills and the taught subjects is presented. © 2020 IEEE.
16.
Yankov, D K; Grigorova, T G
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728175317, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Yankov2020,
title = {Analysis and Investigation of an Asymmetric Bridge Converter for a Three-Phase 12/8 SRM in Generating Mode},
author = {D K Yankov and T G Grigorova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099882260\&doi=10.1109%2fELECTRONICA50406.2020.9305153\&partnerID=40\&md5=23669847118091d8a1afcafe0045268c},
doi = {10.1109/ELECTRONICA50406.2020.9305153},
isbn = {9781728175317},
year = {2020},
date = {2020-01-01},
journal = {11th National Conference with International Participation, ELECTRONICA 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The paper presents an analytical and simulation study of an asymmetric bridge converter fed 12/8 three-phase SRM in generating mode. The main purpose of the study is to clarify the conditions for achieving maximum energy recovery. It is demonstrated that the amount of energy returned from the SRM to the battery depends mainly on the excitation and generation intervals, the PWM duty cycle, the matching of the internal battery resistance and the position-dependent SRM equivalent resistance. The obtained analytical results in MATLAB/Simulink are verified. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
The paper presents an analytical and simulation study of an asymmetric bridge converter fed 12/8 three-phase SRM in generating mode. The main purpose of the study is to clarify the conditions for achieving maximum energy recovery. It is demonstrated that the amount of energy returned from the SRM to the battery depends mainly on the excitation and generation intervals, the PWM duty cycle, the matching of the internal battery resistance and the position-dependent SRM equivalent resistance. The obtained analytical results in MATLAB/Simulink are verified. © 2020 IEEE.
17.
Vuchev, A S; Grigorova, T G
A Study of the Boundary Modes of an LLC DC/DC Converter Operating above Resonant Frequency Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728175317, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Vuchev2020,
title = {A Study of the Boundary Modes of an LLC DC/DC Converter Operating above Resonant Frequency},
author = {A S Vuchev and T G Grigorova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099880495\&doi=10.1109%2fELECTRONICA50406.2020.9305102\&partnerID=40\&md5=64bb7f8b3d431048786d6096f225439d},
doi = {10.1109/ELECTRONICA50406.2020.9305102},
isbn = {9781728175317},
year = {2020},
date = {2020-01-01},
journal = {11th National Conference with International Participation, ELECTRONICA 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The paper presents the results from a study of the performance of an LLC resonant DC/DC converter operating above resonant frequency, including boundary modes (no-load and short circuit), using the state-plane techniques. Comparative data from calculated and simulated results are presented. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
The paper presents the results from a study of the performance of an LLC resonant DC/DC converter operating above resonant frequency, including boundary modes (no-load and short circuit), using the state-plane techniques. Comparative data from calculated and simulated results are presented. © 2020 IEEE.
18.
Yankov, D; Grigorova, T; Dinkov, E
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728143460, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Yankov2020b,
title = {A power loss analysis of a three-phase 12/8 switched reluctance motor fed from asymmetric power converter in MATLAB/SIMULINK},
author = {D Yankov and T Grigorova and E Dinkov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091335894\&doi=10.1109%2fSIELA49118.2020.9167113\&partnerID=40\&md5=21aa0a700d48f20cce00d4cb8f4148b9},
doi = {10.1109/SIELA49118.2020.9167113},
isbn = {9781728143460},
year = {2020},
date = {2020-01-01},
journal = {2020 21st International Symposium on Electrical Apparatus and Technologies, SIELA 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The present paper studies the influence of the different factors (motor speed, turn-on and turn-off SRM switching angles, etc.) on conduction and switching losses in the power converter fed three-phase 12/8 SRM. The analytical methods in use are compared to the simulation results in a MATLAB/SIMULINK environment. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
The present paper studies the influence of the different factors (motor speed, turn-on and turn-off SRM switching angles, etc.) on conduction and switching losses in the power converter fed three-phase 12/8 SRM. The analytical methods in use are compared to the simulation results in a MATLAB/SIMULINK environment. © 2020 IEEE.
19.
Yankov, D
The finite element model and analyses of a three-phase 12/8 pole Switched Reluctance Motor Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728143460, (cited By 0).
Abstract | Links | BibTeX | Етикети: e
@conference{Yankov2020c,
title = {The finite element model and analyses of a three-phase 12/8 pole Switched Reluctance Motor},
author = {D Yankov},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091338852\&doi=10.1109%2fSIELA49118.2020.9167129\&partnerID=40\&md5=78ff7637f514fa2464bd0be0921ed7f3},
doi = {10.1109/SIELA49118.2020.9167129},
isbn = {9781728143460},
year = {2020},
date = {2020-01-01},
journal = {2020 21st International Symposium on Electrical Apparatus and Technologies, SIELA 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The paper presents simulation model, realized by the finite element method of a three-phase 12/8 switched reluctance motor (SRM) in the software simulator Infolytica MotorSolve. The highly non-linear characteristics of this type of motor complicate the analytical methods for the analysis. For this reason, the numerical method (FEA) is used to obtain accurate characteristics of the basic parameters of the motor. The physical dimensions of the machine are used to obtain the model. On the basis of the FEA model, the characteristics of a phase inductance, a torque and a flux-linkage are obtained, which are the main characteristics of SRM, and have a significant impact on the operation of the motor. The obtained simulation results for the different characteristics of the SRM are determined at different positions of the rotor and excitation currents of the phase windings. © 2020 IEEE.},
note = {cited By 0},
keywords = {e},
pubstate = {published},
tppubtype = {conference}
}
The paper presents simulation model, realized by the finite element method of a three-phase 12/8 switched reluctance motor (SRM) in the software simulator Infolytica MotorSolve. The highly non-linear characteristics of this type of motor complicate the analytical methods for the analysis. For this reason, the numerical method (FEA) is used to obtain accurate characteristics of the basic parameters of the motor. The physical dimensions of the machine are used to obtain the model. On the basis of the FEA model, the characteristics of a phase inductance, a torque and a flux-linkage are obtained, which are the main characteristics of SRM, and have a significant impact on the operation of the motor. The obtained simulation results for the different characteristics of the SRM are determined at different positions of the rotor and excitation currents of the phase windings. © 2020 IEEE.
20.
Ivanov, S. C.; Ivanova, Y. N.
Research of the Impact of the Active Driver Circuit with a dv/dt Feedback on the Speed of a DC Motor Conference
Institute of Electrical and Electronics Engineers Inc., 2020, ISBN: 9781728103624, (cited By 0).
Abstract | Links | BibTeX | Етикети: e, ee
@conference{Ivanov2020,
title = {Research of the Impact of the Active Driver Circuit with a dv/dt Feedback on the Speed of a DC Motor},
author = {S. C. Ivanov and Y. N. Ivanova},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099549013\&doi=10.1109%2fEEAE49144.2020.9279016\&partnerID=40\&md5=e81f11c93647e6f7160d8d48c169695f},
doi = {10.1109/EEAE49144.2020.9279016},
isbn = {9781728103624},
year = {2020},
date = {2020-01-01},
urldate = {2020-01-01},
journal = {2020 7th International Conference on Energy Efficiency and Agricultural Engineering, EE and AE 2020 - Proceedings},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
abstract = {The main purpose of the present paper is to study the influence of an active driver with a feedback on the voltage derivative on both the speed and the average current value when performing pulse control of a DC motor. Studies with a conventional driver have also been carried out. A comparative analysis of the obtained experimental results has been made. An analysis of the harmonic composition of the voltage applied to the motor armature when controlling the motor by both the active and the conventional driver has been made. The change in the rotational speed of the motor, as well as in the average value of the current through the armature winding as a function of the pulse duty cycle has been studied experimentally. For comparison between the two drivers, oscillograms and results in tabular form are presented. © 2020 IEEE.},
note = {cited By 0},
keywords = {e, ee},
pubstate = {published},
tppubtype = {conference}
}
The main purpose of the present paper is to study the influence of an active driver with a feedback on the voltage derivative on both the speed and the average current value when performing pulse control of a DC motor. Studies with a conventional driver have also been carried out. A comparative analysis of the obtained experimental results has been made. An analysis of the harmonic composition of the voltage applied to the motor armature when controlling the motor by both the active and the conventional driver has been made. The change in the rotational speed of the motor, as well as in the average value of the current through the armature winding as a function of the pulse duty cycle has been studied experimentally. For comparison between the two drivers, oscillograms and results in tabular form are presented. © 2020 IEEE.