Перегляд Наукові праці по назві
Зараз показуються 1-20 з 25
-
1D Spin-Crossover Molecular Chain with Degenerate States
(AIP Publishing, 2021)A study of the one-dimensional molecular chain (MC) with two single-particle degenerate states is presented. We establish connection of the MC with the Ising model with phononic interactions and investigate properties of ... -
A Low-Cost Digital Pulsed Coherent Spectrometer for Investigation of NQR in Layered Semiconductor GaSe and InSe Crystals
(MDPI, 2020-11-25)A low-cost digital pulsed nuclear quadrupole resonance (NQR) radio-spectrometer is proposed, all main modules of digital processing and synthesis of which on the field-programmable gate array (FPGA) are implemented. The ... -
A portable digital multipulse NQR spectrometer for the study of the sensory properties, structure and defects in layered semiconductors
(IEEE, 2020-02-29)The structure of a digital pulse coherent NQR spectrometer with a minimum number of functional units for the investigation of GaSe and InSe layered semiconductor crystals is proposed. The feature of the proposed measuring ... -
Bond-random model of spin-crossover compounds: similarities and differences from spin glasses
(Springer Nature Switzerland AG, 2021)The Ising-like model of spin-crossover solid compounds with random bonds has been studied by the mean-field (infinite range) replica symmetry approximation. An exact solution to the problem is found and analyzed. Interestingly, ... -
Computer Modelling of the Information Properties of Hyper Chaotic Lorenz System and Its Application in Secure Communication System
(IOP Publishing, 2021)This paper presents computer modeling, analysis and research of the hyper-chaotic Lorenz system based on programming interface that has been developed in LabView software environment. This study allows for generating and ... -
Development of hardware for digital control system of pulsed NQR spectrometer
(IEEE, 2021)The analysis is carried out and the choice of the optimal type of PLD for the implementation of a digital control system for a pulsed coherent NQR spectrometer is proposed. Structural and functional synthesis of electronic ... -
Effect of compression in molecular spin-crossover chains
(Фізико-технічний інститут низьких температур імені Б. І. Вєркіна НАН України, 2021)The thermodynamic properties of a one-dimensional spin-crossover molecular chain under constant external pressure are investigated. The effective compressible degenerate Ising model is used as a theoretical basis. Analytical ... -
Effect of compression in molecular spin-crossover chains
(AIP Publishing LLC, 2021)The thermodynamic properties of a one-dimensional spin-crossover molecular chain under constant external pressure are investigated. The effective compressible degenerate Ising model is used as a theoretical basis. Analytical ... -
Evaluation of the contribution of higher-order electron-nuclear interactions to the NQR frequencies using 115In spectra in InSe
(SPIE, 2021)The 115In NQR spectra in layered InSe single crystals for four spin transitions, the average values of which only approximately satisfied the ratio v1:v2:v3:v4 =1:2:3:4 were studied. It was found that for higher transitions ... -
Implementation of the configuration structure of an integrated computational core of a pulsed NQR sensor based on FPGA
(MDPI, 2021)This paper presents a method for implementing the configuration structure of an integrated computational core of a pulsed nuclear quadrupole resonance (NQR) sensor based on a field-programmable gate array (FPGA), which ... -
Ising-Like Model of Nanosize Spin-Crossover Molecular Crystals
(Springer Nature Switzerland AG, 2021)The properties of spin-crossover nanoparticles were investigated within a framework of Ising-like model. By involving the Monte Carlo simulation tools, a thermal transition of spin-crossover solids with local random fields ... -
Radioelectronics and information technologies in physical experiments : Part 1. General principles of development and applications of a simple handmade pulsed NQR device
(OmniScriptum Publishing, 2021)The book describes the creation of new and improvement of existing methods for studying nuclear quadruple resonance by solving an important application problem – the development of cheap, portable, digital, multipulse ... -
Simple Autonomous Security System Based On Arduino UNO Platform and Fingerprint Scanner Module: A Study Case
(CEUR-WS, 2021)In this paper, we presented a simple autonomous security system. This security system based on the Arduino Uno and fingerprint scanner module. The Arduino was connected to a computer through the USB port and programmed ... -
Structural and functional synthesis of the continuous wave NQR temperature sensor with increased conversion linearity
(Elsevier, 2020-11-12)The paper describes development of the detailed structure and circuit diagrams of the continuous wave NQR temperature sensor with increased conversion linearity. It is experimentally established that at amplitude modulation ... -
Structural and functional synthesis of the radioelectronic means of a pulsed NQR
(Stefan cel Mare University of Suceava, 2020-05-23)The principles of structural and functional synthesis of the radioelectronic means of a pulsed NQR are presented. To simulate signal transformations in the radio frequency paths of the spectrometer, an imitation model of ... -
Synthesis of the configuration structure of digital receiver of NQR radiospectrometer
(Society of Polish Electrical and Electronics Engineers, 2018)Analysis of methods for demodulation of free induction decay signal that are suitable for use in pulsed nuclear quadruple resonance radiospectrometers was performed. The structure and MATLAB Simulink model of the receive ... -
The use of marginal oscillator detector with increased conversion linearity for recording broadband multiplet nuclear quadrupole resonance spectra
(Sumy State University, 2021)This paper describes the features of choosing the sweep method and mode in the study of broadband multiplet nuclear quadrupole resonance (NQR) spectra using marginal oscillator sensor with increased conversion linearity. ... -
Деякі особливості режимів роботи автодинного сенсора ядерного квадрупольного резонансу з підвищеною лінійністю перетворення в умовах частотної та магнітної модуляцій
(Хмельницький національний університет, 2021)Проведено аналіз роботи автодинного сенсора ядерного квадрупольного резонансу (ЯКР) з підвищеною лінійністю перетворення в режимі частотної модуляції. Встановлено, що для отримання оптимальних результатів функція частотної ... -
Дослідження схемних рішень амплітудних демодуляторів автодинних спін-детекторів
(Хмельницький національний університет, 2020)В роботі описано застосування SPICE-моделювання для дослідження амплітудних демодуляторів автодинних спін-детекторів. Амплітудна демодуляція на нелінійному елементі досить поширена в методиці на основі неперервного ...