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Dive into the research topics where Oleksandr M. Vasilevskyi is active.

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Featured researches published by Oleksandr M. Vasilevskyi.


international conference of young specialists on micro nanotechnologies and electron devices | 2016

Routing in telecommunication networks using fuzzy logic

Andriy Semenov; Olena Semenova; Oleksandr Voznyak; Oleksandr M. Vasilevskyi; Maksym Yakovlev

In the paper it has been proposed to use a fuzzy-controller in telecommunication networks for improving the routing process. An architecture of the fuzzy-controller was developed. Linguistic variables, terms and membership functions for input and output values have been defined. Rules base has been developed. The operation of the fuzzy-controller has been simulated.


Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2018 | 2018

Optical method to determine the quantity of water in milk using the visible radiation range

Piotr A. Kisała; Volodymyr Y. Kucheruk; Pavlo I. Kulakov; Oleksandr M. Vasilevskyi; Dmytro Mostovyi; Anna Kulakova; Iryna M. Kobylanska; Gayni Karnakova

An optical method for determine the quantity of water in milk using the visible optical radiation range is proposed. On the basis of theoretical and experimental studies of the water-milk solution spectral characteristics the proposed method mathematical model was created. The mathematical modeling of passing of the visible range optical radiation through a water-milk solution on certain thickness of the solution layer is carried out. As a result of the modeling, the dependence of the output voltage of the photo-receiver based on a pair of photodiode-operating amplifier from the relative mass fraction of milk in the water-milk solution and the wavelength of the optical radiation in the visible range is obtained.


Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2018 | 2018

A new approach to assessing the dynamic uncertainty of measuring devices

Waldemar Wójcik; Oleksandr M. Vasilevskyi; Pavlo I. Kulakov; Dmytro Kompanets; Oleksander M. Lysenko; Vasyl Prysyazhnyuk; Doszhon Baitussupov

A spectral method for estimating the dynamic uncertainty of measuring instruments based on a mathematical model of the frequency characteristic of a measuring instrument and a model of the spectral function of an input signal is presented. The model equation for estimating the amplitude value of the dynamic measurement uncertainty is obtained, which is caused by the limited properties of the measuring devices when a measuring signal passes through it in dynamic operation modes. A mathematical simulation of the characteristic of the dynamic uncertainty variation during the passage of a measuring signal through a measuring transducer is performed using the dynamic model of a vibration transducer as an example.


Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2018 | 2018

Method of evaluating the level of confidence based on metrological risks for determining the coverage factor in the concept of uncertainty

Waldemar Wójcik; Oleksandr M. Vasilevskyi; Volodymyr M. Didych; Anna Kravchenko; Maksym Yakovlev; Iryna Andrikevych; Dmytro Kompanets; Yevhen Danylyuk; Askhat Nurmakhambetov

A method for estimating the level of confidence for determining the coverage factor based on metrological risks is proposed using the example of using information on tolerances and uncertainty of measuring the activity of ions, which allows to establish a reasonable interval around the measurement result, within which most of the values that can be justified are assigned to the measured value.


Radio Electronics, Computer Science, Control | 2016

EVALUATION OF UNCERTAINTY MEASURING OF SENSE OF THE NATURAL LANGUAGE CONSTRUCTS

Oleg V. Bisikalo; Oleksandr M. Vasilevskyi

Вирішено завдання оцінки невизначеності вимірювання сенсу природно-мовних конструкцій (ПМК) на основі формалізації понять мовного образу, штучної когнітивної системи та одиниці сенсу. В основу моделі бази знань штучної когнітивної системи закладено статистичну інформацію про асоціативну сполучуваність мовних образів, що надає підстави для уніфікованої оцінки одиниці та кількості сенсу ПМК. Запропоновано метод вимірювання сенсу ПМК на основі нечіткого відношення сенсу, який забезпечує врахування інформації про зв’язки між лемами тексту, що дозволяє отримати оцінку двох типів невизначеності вимірювання ознак сенсу. Отримано та інтерпретовано формальні оцінки невизначеності результатів вимірювання сенсу ПМК, що дозволяє врахувати інформацію про зв’язки між лемами для розв’язання прикладних задач комп’ютерної лінгвістики. За допомогою розробленого на основі пакету DKPro Core програмного забезпечення проведено експерименти з дослідження запропонованого методу в задачі виявлення інформативних ознак тексту. В результаті проведених експериментів отримано залежності параметрів виявленого Парето-подібного закону розподілу зв’язків між лемами, аналіз яких дозволяє вважати показник середньої кількості зв’язків мовного образу найбільш інформативною чисельною ознакою тексту.


International Journal of Metrology and Quality Engineering | 2015

A frequency method for dynamic uncertainty evaluation of measurement during modes of dynamic operation

Oleksandr M. Vasilevskyi


International Journal of Metrology and Quality Engineering | 2014

Calibration method to assess the accuracy of measurement devices using the theory of uncertainty

Oleksandr M. Vasilevskyi


International Journal of Metrology and Quality Engineering | 2017

Metrological characteristics of the torque measurement of electric motors

Oleksandr M. Vasilevskyi


Pomiary Automatyka Kontrola | 2014

An approach to the evaluation of dynamic uncertainty in measurement using non-statistical techniques

Oleksandr M. Vasilevskyi; V. Kucheruk; I. P. Kurytnik


Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017 | 2017

Vibration diagnostic system for evaluation of state interconnected electrical motors mechanical parameters

Oleksandr M. Vasilevskyi; Pavlo I. Kulakov; Igor A. Dudatiev; Volodymyr M. Didych; Andrzej Kotyra; Batyrbek Suleimenov; Azat Assembay; Ainur Kozbekova

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Pavlo I. Kulakov

National Technical University

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Oleg V. Bisikalo

National Technical University

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Andriy Semenov

National Technical University

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Igor A. Dudatiev

National Technical University

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Oleksandr Voznyak

National Technical University

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Olena Semenova

National Technical University

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Andrzej Kotyra

Lublin University of Technology

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