×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Capitalization industrial enterprise resource in the cluster in innovative development strategies

    The problems of finding and implementing provisions increasing the competitiveness of domestic production due to the effective capitalization of resources , which is a set of multi-level institutional processes and management actions to ensure efficient binding of economic resources for the modernization of innovation based on the reproduction processes in the enterprise. Shows a conceptual view of the process of strategy formation capitalization resource industries in the cluster. A scheme of structure-function relationships of subjects clustered relations conditional capitalization of resources.

    Keywords: capitalization of resources, institutional bondage, clustering relationships, competitive potential, enterprise, innovation development

  • System simulation of the service sector: scientific, educational, innovative and cultural aspects

    The paper approaches of different paradigms of simulation in the study of subsystems of modern society, including relating to the service sector - such as cultural complex, the regional scientific environment, the educational and innovation system.  Examples of models appropriate social processes and systems are presented. Concluded that modern experts studying social processes (sociologists, conflict, political scientists) should be able to use the simulation.

    Keywords: simulation, cultural complex, the scientific environment, education system, discrete-event simulation, agent-based modeling

  • Adaptive control system and diagnostic system for wicket gate adjusting system servomotors of Kaplan turbines

    The article is concerned with problems of modern electrohydraulic converters control systems used to adjust wicket gate of Kaplan turbine. Linearized model of wicket gate servomotor is considered. Algorithm for online identification of parameters of servomotor is considered. Algorithm is based on recurrent least squares method. Algorithm for adaptive PI-regulator tunning is based on online optimization of functional of generalised work (FGW). Model experiments using real data show reducing maximum control error of servomotor position from 20 % to 1 %. Also methods for servomotor state diagnostic are considered.

    Keywords: adaptive control system, diagnostic system, Kaplan turbine wicket gate, linearized models, identification, recurrent least square, functional of generalised work

  • Ration of energy consumption of educational institutions by neural network approach

    The problems concerning the application of neural networks for solving the topical problem of rationing energy consumption educational institutions (EI). A scheme of the neural network approach for determination of the normative costs of electricity and heat EI. In the package Neurosolutions created neural network model of power and heat consumption of classical universities. Advantages of neural networks for solving the problem of rationing

    Keywords: standard consumption, energy consumption, educational institutions, artificial neural network

  • Modeling of electrodynamic parameters of a multi-mode double-gap cavity for using in miniaturized multi-beam klystron’s devices

    For miniaturized vacuum klystron type devices utilization of a double- gap strip-line cavity with suspended ceramic substrate is very promising. 
    The two-mode operating mode of such cavities practically isn't studied enough; so there is the great scientific and practical interest for research of electrodynamic characteristics of cavities during multi-mode operation that correspond to simultaneous excitement of anti-phase and co-phase modes in a double gap.  
    In this article results of the 3-D numerical modeling by means of the Ansoft HFSS code are presented, and also the experimental results of the electrodynamic properties of the half-wave double- gap cavity with the suspended ceramic substrate are submitted. Optimum parameters of this design, allowing to carry out simultaneous excitement at multiple frequencies with frequency rate (K=2) are determined.
    In such cavity high values of unloaded Q factors isn’t need because dielectric losses and conductor losses can be compensated at the expense of  the negative electronic conductivity that brought by modulated electronic beam. The operating mode with frequency rate   can be used for increasing of efficiency of generating and amplifying micro devices with filament cathode and matrix field emission cathodes.  

    Keywords: double-gap cavity, electrodynamic parameters, mathematical simulation, resonance frequency, characteristic impedance, method of planned experiment

  • The algorithm for constructing the trajectories of moving objects in a video based on optical flow

    At present, the development of algorithms is particularly relevant high-level analysis of video sequences, including tracking of objects in a video stream and their implementation in information and communication systems. In the proposed approach the pretreatment step uses optical flow calculation for each frame video sequence, as well as low-level features (such as a representation of each pixel in the color space YIU). For moving objects optical flow is more important than for a stationary background and allows you to find the foreground objects in video sequences and adjust the weighting function in determining the histogram similar to the adjacent frames, taking into account the motion of objects.

    Keywords: computer vision, tracker, tracking of object, optical flow, motion tracking

  • On the synthesis of nanocomposite FeNi3/C under IR heating and its application to high-density magnetic recording

    The synthesis of nanocomposite FeNi3/C based on the PAN, FeCl3 · 6H2O and NiCl2 · 6H2O, whereby the first time by the IR heating at 400 ÷ 700 ° C obtained nanocomposite FeNi3/C FeNi3 particle size of 10 to 80 nm are uniformly distributed UM. Using thermodynamic calculations based on the minimization of the Gibbs energy, confirmed the synthesis of nanocomposite FeNi3/C at T=400 ° C reduction of Fe and Ni with H2, produced during the process of carbonization of polyacrylonitrile with infrared heating. Designed as a nano material of the films can be effectively used as a carrier material for a magnetic information recording superdense. Recording density is achieved in such a carrier (85-100) Gb/dyuym2. ​

    Keywords: nanocomposite, polyacrylonitrile, infrared heating, recording information, the magnetic properties, the carbon matrix

  • Gold nanoparticles functionalisation by long-chain thiol and amine ligands: study of local atomic and electronic structure of ligand-gold bond

    In the present work we report on the study of local atomic and electronic structure of gold nanoparticles funnctionalised by thiol and amine containing long-chain ligands. The study of nanoscale atomic structure is performed by means of X-ray absorption spectroscopy (XANES: X-ray Absorption Near-Edge Structure) and computer simulation. In consequence of the experimantally obtained data analysis and computer simulation it was obtained that strong bonding takes place when 11-mercaptoundecanoic acid is bound to the gold nanoparticles surface, forming a chemical bond Au-S 0.25 nm in length. Weaker bonding is observed when forming bond between dodecylamine and gold nanoparticles surface atom resulting in Au-N bond 0.23 nm in length. Supplementary XANES spectra analysis by means of density functional theory reveals the nature of formation of the investigated nanoscale structure.

    Keywords: nanoscale structure of matter, X-ray absorption spectroscopy, XANES, density functional theory, nanoparticles functionalisation

  • GPR determination of electrical and physical properties of motor road and railway structural layers

    The paper studies the possibility of quantitative processing of the GPR data for determining the dielectric permittivity and conductivity of a medium (soil samples). Experimental studies are made using radargrams of soil samples with specified values of moisture and conductivity. New methods of quantitative processing of radargrams are proposed in this work to determine the dielectric permittivity and conductivity of soils. The methods were successfully tested on various sections of Russian railways net.

    Keywords: layered road profiling, GPR, soil moisture, soil layers profiling, soil conductivity

  • Features of preparation of students of creative professions in the modern university

    • Abstract

    The problem of specificity of training students in high school artists. Defines the principles and features of training on the theoretical and practical sessions. Identifies the purposes of higher education.

    Keywords: art education, teaching, vocational training, self-development

  • The ratio of particles sizes in polydispersed structures as the first step to the optimization of composite binding compounds

    Calcating-experimental method shows that on the basis of cement and fine-grounded mineral powder, complex binding materials can be obtained, providing high strength of obtained stones.

    Keywords: cement, mineral powder, components, optimization, strength

  • Features of the paid roads modeling methods

    In this article the problems of transport modeling, modeling methods of the paid roads, their features, advantages and disadvantages are considered.

    Keywords: transport modeling, check-point on the paid road, point of collection of a fare, modeling methods, imitating modeling, the program AIMSUN complex

  • Complex research of the composition and structural characteristics of the rock-forming minerals in Millerovsky bentonite clay

    This work deals with the integrated study of the composition and structural characteristics of the rock-forming minerals in Millerovsky bentonite clay. The qualitative and quantitative analysis of the clay samples is made by X-ray diffraction , X-ray photoelectron spectroscopy and thermal analysis . The morphological and microstructural features of minerals are investigated by scanning electron microscopy. The application of the method of direct theoretical calculation of the diffraction patterns is showm to determine the crystal-chemical parameters of the studied minerals. The results are aimed at explaining a number of physical and chemical properties of layered aluminosilicate.

    Keywords: clays, clay minerals, layered silicates, x-ray diffraction, crystalline systems

  • Comparative analysis of porous piezoceramics modelling by effective moduli and finite element methods with experimental data

    The results of computational experiments to determine the characteristics of the porous piezoelectric ceramics based on the methodology, including the effective modules method, simulations of representative volumes on a simple random method and the method of Witten-Sander, finite element method to solve static piezoelectric problems for heterogeneous composite media and the accounting of inhomogeneous polarization near the pores are presented. A comparison of the results of computer simulation with the known experimental data for the porous material PZT-4 and its analogs is realized. It is concluded that the accounting of inhomogeneous polarization in the vicinity of porous provide the better agreement between numerical results and large number of known experimental data. Thus, for most effective constants the smallest errors are obtained for a representative volume of the porous piezoelectric material, constructed by Witten-Sander method.

    Keywords: piezocomposite, porous piezoelectric ceramics, inhomogeneous polarization, mathematical modelling, models of representative volumes, finite element method, effective moduli

  • The influence of electric field of junction with Schottky barrier on the impurity atoms relocation in semiconductor.

    The simulation of the process of the electrically active impurities relocation in the electric field of Schottky diode space charge region has been made. The analysis of the simulation results shows the possibility of controlled alloying impurities relocation on the depth about tens of nanometers caused by electrically active atoms diffusion in the electric field of Schottky diode space charge region.

    Keywords: diffusion, space charge region, Schottky diode