DSpace Community:http://er.nau.edu.ua:8080/handle/NAU/91532019-05-22T13:08:47Z2019-05-22T13:08:47ZA computer system for images compressionKucherov, DmytroKucherov, D.P.Кучеров, Д.П.http://er.nau.edu.ua:8080/handle/NAU/386572019-05-16T10:02:06Z2019-04-25T00:00:00ZTitle: A computer system for images compression
Authors: Kucherov, Dmytro; Kucherov, D.P.; Кучеров, Д.П.
Abstract: A new approach to images compression is proposed. The approach involves the use of elements of tensor analysis based on singular decomposition. A feature of this approach used is the representation of the image by the matrix triad, which includes the tensor core and a pair of unitary matrices containing right and left singular vectors, respectively. Compression is achieved by one recurrent procedure, which involves lowering the rank of the triad to the level of allowable errors while maintaining the original image size. The result of semi-natural modeling the system components is provided.
Description: A new approach to images compression is proposed. The approach involves the use of elements of tensor analysis based on singular decomposition. A feature of this approach used is the representation of the image by the matrix triad, which includes the tensor core and a pair of unitary matrices containing right and left singular vectors, respectively. Compression is achieved by one recurrent procedure, which involves lowering the rank of the triad to the level of allowable errors while maintaining the original image size. The result of semi-natural modeling the system components is provided.2019-04-25T00:00:00ZІНФОРМАТИКА ТА КОМП’ЮТЕРНА ТЕХНІКА Методичні рекомендації до виконання лабораторних робіт для студентів напряму 0501 «Економіка і підприємництво»Кадет, Наталія ПавлівнаМалюк, Ірина АнатоліївнаШевцова, Євгенія Валеріївнаhttp://er.nau.edu.ua:8080/handle/NAU/386562019-05-16T09:27:52Z2008-01-01T00:00:00ZTitle: ІНФОРМАТИКА ТА КОМП’ЮТЕРНА ТЕХНІКА Методичні рекомендації до виконання лабораторних робіт для студентів напряму 0501 «Економіка і підприємництво»
Authors: Кадет, Наталія Павлівна; Малюк, Ірина Анатоліївна; Шевцова, Євгенія Валеріївна
Description: Запропоновані методичні рекомендації містять 18 лабораторних робіт з дисципліни «Інформатика та комп’ютерна техніка». Виконання лабораторних робіт дозволяє розширити і закріпити лекційний матеріал, одержати основні навички роботи з електронною таблицею MS Excel та системою керування базами даних MS Access.2008-01-01T00:00:00ZAutomated Systems in the Aviation and Aerospace IndustriesKucherov, DmytroKucherov, D.P.Кучеров, ДмитроКучеров, Дмитрий павловичKucherov, Dmytro P.http://er.nau.edu.ua:8080/handle/NAU/380242019-03-12T17:01:56Z2019-03-12T00:00:00ZTitle: Automated Systems in the Aviation and Aerospace Industries
Authors: Kucherov, Dmytro; Kucherov, D.P.; Кучеров, Дмитро; Кучеров, Дмитрий павлович; Kucherov, Dmytro P.
Abstract: A solution is proposed for the task of controlling a group of UAVs moving along a given route. The group
is considered as a limited-size formation consisting of n-agents moving relative to the leader, which allows
us to treat the group as some aggregate with the center of motion. The quantitative composition of
a group can change while maintaining the integrity of the group. The chapter proposes the use of smooth
laws governing the motion of a group. The safety of motion is ensured by introducing into the law of
control the components equivalent to the creation of attractive and repulsive fields.
Description: A solution is proposed for the task of controlling a group of UAVs moving along a given route. The group
is considered as a limited-size formation consisting of n-agents moving relative to the leader, which allows
us to treat the group as some aggregate with the center of motion. The quantitative composition of
a group can change while maintaining the integrity of the group. The chapter proposes the use of smooth
laws governing the motion of a group. The safety of motion is ensured by introducing into the law of
control the components equivalent to the creation of attractive and repulsive fields.2019-03-12T00:00:00ZProtection of Information Networks Based on LoRa TechnologyKucherov, D.P.Kucherov, DmytroКучеров, Д.П.Кучеров, Дмитрий Павловиhttp://er.nau.edu.ua:8080/handle/NAU/379872019-03-06T10:28:55Z2019-02-20T00:00:00ZTitle: Protection of Information Networks Based on LoRa Technology
Authors: Kucherov, D.P.; Kucherov, Dmytro; Кучеров, Д.П.; Кучеров, Дмитрий Павлови
Abstract: The paper deals with modern technology for transmitting short messages
over long distances named LoRa, where the transmitted signal uses linear
frequency modulation (chirp). The object of the study to define lack of transmitters
that it has a design on LoRa technology for assessment their applicable in
condition urban city where there are a lot of radiation sources. The goal of the
work is the creation of a method of assessing the act the interference conditions
that based on measurement bit error rate and signal-noise ratio and via on which
to get individual host vulnerability levels. The processing of these signals is carried
out by means of a time-frequency transformation. The chirp signal is characterized
by 4 parameters: frequencies, time, modulation rate and amplitude.
By analogy with the wavelet transform, the processing of chirp signals involves
a chirplet decomposition. Since the chirp signals are strongly influenced by mutual
interference due to multipath, the article studies the effectiveness of LoRa
technology in conditions of mutual interference of radiation sources. The developed
method utilized chirplet decomposition and retrieve symbols of a message
in the dictionary. The conducted experiments have confirmed the proposed
software operability and allow recommending it for use in practice for solving
the problems receiving signal. The prospects for further research may include
the creation of parallel methods for calculation of the set of proposed indicators,
the improvement of software, as well as an experimental study of proposed indicators
in real conditions.
Description: The paper deals with modern technology for transmitting short messages
over long distances named LoRa, where the transmitted signal uses linear
frequency modulation (chirp). The object of the study to define lack of transmitters
that it has a design on LoRa technology for assessment their applicable in
condition urban city where there are a lot of radiation sources. The goal of the
work is the creation of a method of assessing the act the interference conditions
that based on measurement bit error rate and signal-noise ratio and via on which
to get individual host vulnerability levels. The processing of these signals is carried
out by means of a time-frequency transformation. The chirp signal is characterized
by 4 parameters: frequencies, time, modulation rate and amplitude.
By analogy with the wavelet transform, the processing of chirp signals involves
a chirplet decomposition. Since the chirp signals are strongly influenced by mutual
interference due to multipath, the article studies the effectiveness of LoRa
technology in conditions of mutual interference of radiation sources. The developed
method utilized chirplet decomposition and retrieve symbols of a message
in the dictionary. The conducted experiments have confirmed the proposed
software operability and allow recommending it for use in practice for solving
the problems receiving signal. The prospects for further research may include
the creation of parallel methods for calculation of the set of proposed indicators,
the improvement of software, as well as an experimental study of proposed indicators
in real conditions.2019-02-20T00:00:00Z