Principles of integrative modelling at studying of plasma and welding processes

The relevance of the problem subject to the research is conditioned by need for introduction of modern technologies into the educational process and insufficient adaptation of the higher school teachers to the applied information and automated procedures in education and science. The purpose of the publication consists in the analysis of automated procedures efficiency in engineering training and development of structurally functional model of information skills for students and teachers during their teaching in welding and allied technologies. The leading approach to research of this problem is the structurally functional method of the objects studying. This method based on representation of technological structure as hierarchical sequence of the interconnected devices and division of a matter into objects and means of influence that allows to allocate the processes providing functioning between means of influence. In the publication the structurally functional models of information skills formation for students and teachers in engineering and natural-science training are presented. The materials of the publication can be useful for students and teachers at studying of welding and allied technologies and development of scientifically-methodical maintenance for engineering and natural-science disciplines. © 2016 Anakhov et al

Scattering of evanescent wave by two cylinders near a flat boundary

Two-dimensional problem of evanescent wave scattering by dielectric or metallic cylinders near the interface between two dielectric media is solved numerically by boundary integral equations method. A special Green function was proposed to avoid the infinite integration. A pattern with a circular and a prolate elliptic cylinders, respectively, is suggested to simulate the sample and the probe in near-field optical microscopy. The energy flux in the midplane of the probe-cylinder is calculated as a function of its position.Comment: 10 pages, 4 figure

Generating pure single-photon states via spontaneous four-wave mixing in a system of coupled microresonators

© 2018 Astro Ltd. We present the optimal design for an on-chip single-photon source based on spontaneous four-wave mixing in a system of coupled ring microresonators, which provides the frequency-uncorrelated joint spectral amplitude of the biphoton field and thereby the generation of pure single-photon heralded states. A simple method is proposed for suppressing negative dispersion effects by optimizing the controlled spectroscopic parameters of the system. It shown that the optimal coupling parameters, in combination with the optimal spectral width of the pump pulse, give rise to the highest purity of the heralded photons for a given pump linewidth

Dynamical Evolution of Packed Extrasolar Planetary Systems

The orbital evolution of packed extrasolar planetary systems 61 Vir, GJ 3138 and HD 39194 is investigated in the frame of the second order averaged motion theory which is constructed by authors. The stability of planetary orbits and their dynamical properties are defined by the integration of motion equation on long-time scales. For the reason that masses and orbital elements are defined from observations with some errors, some variants of orbital evolution are given depending on specific values of these varying parameters.В рамках построенной авторами осредненной теории движения второго порядка исследуется орбитальная эволюция компактных внесолнечных планетных систем 61 Vir, GJ 3138 и HD 39194. По результатам интегрирования уравнений движения на длительных интервалах времени определяются устойчивость планетных орбит и их динамические характеристики. Поскольку массы и элементы орбит планет известны из наблюдений с некоторыми ошибками, даются различные варианты орбитальной эволюции в зависимости от конкретных значений этих варьируемых параметров.Работа выполнена при поддержке Российского фонда фундаментальных исследований, грант № 18-32-00283

Dynamical evolution of packed extrasolar planetary systems

Построена осредненная численно-аналитическая теория движения планетных систем с точностью до второго порядка по массам планет. В рамках данной теории изучается орбитальная эволюция двух компактных внесолнечных трехпланетных систем HD20794 и GJ3138 на длительных интервалах времени. Определяются устойчивость планетных орбит и резонансные свойства движения. Поскольку массы и элементы орбит планет известны из наблюдений с ошибками, даются различные варианты орбитальной эволюции в зависимости от конкретных значений этих параметров.Averaged semi-analytical motion theory of planetary systems is constructed up to the second degree of planetary masses. Within this theory the orbital evolution of packed extrasolar three-planetary systems HD20794 and GJ3138 is described on long-time scales. The stability of planetary orbits and resonant properties of the motion are considered. For the reason that masses and orbital elements are defined from observations with some errors, some variants of orbital evolution are given depending on specific values of these parameters.Работа выполнена при финансовой поддержке Правительства Российской Федерации (постановление № 211, контракт № 02.A03.21.0006) и Министерства образования и науки Российской Федерации (базовая часть государственного задания, РК № AAAA-A17-117030310283-7)