Analytical Approach to the Calculation of Three-Dimensional Transducers for the Acoustic Control Methods

For diagnostic acoustic methods piezoelectric ceramic circular disks are typically used as active transducer elements. To calculate the response of such transducers, simplified numerical calculation methods, having limited applicability, are widely used. In the present work the strict analytical methods of elasticity theory have been used to calculate the three-dimensional vibrations of circular piezoelectric disks having a general dependence on both diameter and thickness. The approach we employed is based on the eigenfunction method of dynamic electric elasticity developed in [1]

Ecological competence of specialists of design education

This article analyzes the essence and functions of ecological design, problems of professional ethics of a designer, the necessity to form ecological competence in the course of design educationАнализируются сущность и функции экологического дизайна, рассматриваются проблема профессиональной этики дизайнера, необходимость формирования экологической компетенции в процессе дизайн-образовани

The inclusion of the concept of sustainable development in the content of training designers

The article substantiates the necessity of the inclusion of «Ecological design» in the curriculum for the training of designers and teachers-designersВ статье обосновывается необходимость включения курса «Экологический дизайн» в учебные планы подготовки дизайнеров и педагогов профессионального обучения в области дизайн

Environmental design as new content of training

В статье рассматривается специфика экологического дизайна и обобщается опыт дизайн-образования.In the article the specific of ecological design is examined and experience of design-education is summarized

STUDY OF COMPUTER VISION ALGORITHMS FOR SPACE TRACKING SYSTEMS IN TYPICAL MODES OF THEIR FUNCTIONING

The paper proposes an algorithm for an object capturing and tracking in a frame for automatic phase focusing of a single-objective camera with a mirror obturator. The capture is performed by the object identification through the filtering of boundaries and edges by the Canny operator; then the Hough transformation is used to detect the characteristic lines of the object. Reliable support of the object is provided by a predictor/equalizer based on the Kalman filter. The proposed calculation algorithm makes it possible to achieve optimal performance, sufficient for the object capturing and tracking in the frame and its timely exposure. This algorithm was implemented to track an object within the scene, the trajectory and speed of which are unknown in advance that excludes the possibility of creation a self-learning algorithm. The Canny operator provides the most accurate detection of object boundaries from existing filtering methods that simplifies the subsequent image processing. The application of an additional Hough transformation makes it possible to speed up the calculations by reducing the amount of data processed, confirming the overall speed of the algorithm as compared to the classical filtering method. The usage of the Kalman filter as a predictor/equalizer gives the possibility to pre-determine the point for focusing at the next time. The proposed calculation algorithm makes it possible to achieve optimal performance, sufficient for the object capturing and tracking on the stage, and also sufficient for timely exposure of the frame

SiC Nanofibers in Canals and Pores of Cordierite Honeycomb Material as a Support for Catalyst in CO-PROX Reaction

The Cu–Co oxide system supported on SiC nanofibers deposited on cordierite was studied in the CO oxidation reaction in the presence of hydrogen

Unconventional magnetism of non-uniform distribution of Co in TiO2 nanoparticles

High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) analysis, electron paramagnetic resonance (EPR), X-ray absorption spectroscopy (XAS), magnetic methods, and density-functional theory (DFT) calculations were applied for the investigations of Co-doped anatase TiO2 nanoparticles (∼20 nm). It was found that high-spin Co2+ ions prefer to occupy the interstitial positions in the TiO2 lattice which are the most energetically favourable in compare to the substitutional those. A quantum mechanical model which operates mainly on two types of Co2+ – Co2+ dimers with different negative exchange interactions and the non-interacting paramagnetic Co2+ ions provides a satisfactorily description of magnetic properties for the TiO2:Co system. © 2020 Elsevier B.V.Russian Foundation for Basic Research. Ministry of Science and Higher Education of the Russian Federatio

Kinetic study of carbon dioxide catalytic methanation over cobalt–nickel catalysts

Based on the data of the thermoprogrammed desorption and using mass-spectroscopic analysis of desorbed products and on the kinetic patterns of the methanation process for cobalt–nickel catalysts, we suggested a mechanism for the reaction which passes through forming intermediate formyl compounds: CHO*, HCOH*, and HCOOH*. Because of the high stability of the carbon dioxide molecule, the step of adding the first hydrogen atom is the limiting step. Such a mechanism is in good agreement with the proposed kinetic equations