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  • The algorithm of mixed finite element method for solving problems of beam theory

    The mixed finite element method has advantages over classical formulations of Lagrange and Castigliano, and ensures high precision and smoothness approximate solutions for strains and stresses.
    In practice, using the mixed finite element method is limited by high size of linear equation systems, which leads to significant increasing time costs.
    Using the orthogonal finite functions for approximating of unknowns leads to generation of sparse linear systems with a special structure.
    That system can be simplified during solution.
    This article proposes the algorithm of modificated Gaussian elimination for preliminary transformation an extended matrix of linear system.
    This algorithm underlies software complex, which includes LISTSOLVER, the author's solver.
    Confirmed the efficiency of created solver in compare with common-type solver.

    Keywords: mixed finite element method, sparse linear systems, orthogonal finite functions, Gaussian elimination

  • Evolutionary approach to modeling of the distribution processes

    Considered the proposed approach to the allocation of resource flows. The approach developed on the basis of the method of bee colonies. Experimentally determined the dependence of the error of the algorithm of the problem dimension. Shows the dependence of the distribution of resources from a number of iterations, and the power of the swarm, and dynamics approximation of the distribution to the optimum.

    Keywords: optimization, distribution, collective adaptation, evolution, the error of the algorithm

  • Methodological aspects to the assessment of competitiveness in terms of innovation

    In this article, the author has rasmmotreny different approaches to the evaluation of competitiveness in terms of innovation.

    Keywords: competitiveness, meso-level and micro-level, macro-level, the ranking of competitiveness advantages, quantitative and qualitative indicators

  • Algebraic Analysis of Cryptographic Security Systems

    The research of algebraic cryptanalysis method was carried out in this work. Systems of the equations for tables of various sizes of nonlinear transformations of substitution for simplified model of GOST28147-89 algorithm are received, also we solve a one of this systems by a XL method. During this work we produced a program, which has realised a generation and solving of system of equations describing nonlinear transformations of substitution. We analysed a nonlinear systems of equations and calculated a value of complexity of XL method for eight blocks of substitution.

    Keywords: Algebraic cryptanalysis, XL method, nonlinear transformations of substitution, linearization nonlinear systems, Gauss elimination method, a cryptographic key, GOST28147-89 encryption algorithm

  • UV photodetector based on nanorods and zinc oxide films

    With the use of pulsed laser deposition and carbothermal synthesis а photosensitive structure on the basis of the Schottky barrier Au/ZnO(nanorods)/ZnO(film)/ZnO(nanorods)/Au was obtained. The parameters of the carbothermal method of synthesis of nanorods ZnO were optimized. Under directly applied bias of 7V current sensitivity of luminous flux for this photodetector is observed in the UV and visible regions of the spectrum, and is 0.14 A/W - for 325 nm and 0.18 A/W - to 405 nm, which means that this structure has the ability of potential applications in various fields for the control of UV radiation (for example, for the monitoring of solar UV radiation, control of UV radiation in air and disinfecting water devices).

    Keywords: ZnO nanorods, Schottky barrier, photodetector, photosensitivity

  • Catalyst-free thermal synthesis of ZNO nanocrystals from zinc vapor by low temperature

    ZnO nanorod arrays have been synthesized on silicon wafers by chemical vapor deposition (CVD) technique with different  temperature modes, without metal catalyst.  With this method   vertically aligned ZnO nanostructures  were grown at the quite low temperatures.  Modification of the method allowed to place silicon substrates in areas with different  ratios of concentrations of the molecules in the vapor phase. Photoluminescence spectroscopy and electron microscopy studies have shown that morphologies and optical properties of nanorods depends on different ratios of concentrations of the molecules in the vapor phase.

    Keywords: ZnO nanorods,chemical vapor deposition (CVD), photoluminescence

  • Pulsed laser deposition of ZnO nanostructures

    The arrays of ZnO nanorods were obtained on the sapphire substrates by means of pulsed laser deposition under the high pressure of argon. The conditions of synthesis were optimized, and their influence on the morphology of  ZnO nanostructures were revealed. It is shown that the concentration of oxygen vacancies in ZnO nanorods can be changed by regulation of the synthesis temperature from 850 to 915 °. This process can be controlled by the ratio of intensities of the photoluminescence emission in the visible and ultraviolet regions. So, it allows to create nanostructures for UV photodetectors or chemosensors depending on the temperature choice.

    Keywords: ZnO nanorods, laser deposition, PLD, photoluminescence

  • Processing of spatial information about the boundaries of sanitary zones of waste landfills on the basis of fuzzy logic

    The method of application of fuzzy logic to solve the problem of spatial planning using geographic and information systems is described. The spatial arrangement of objects on the map is used as input factors of the solution, to find which a model of the spatial descriptions of objects using a bitmap representation is constructed. The way of formalizing fuzzy judgments about positional relationship of objects and the system of inference making based on the fuzzy logic methods is developed. An example of using the method described in this article to determine the sanitary protection zone of industrial waste landfill in the territory of the Republic of Bashkortostan is given

    Keywords: fuzzy logic, geographic information systems, the problem of territorial planning, disposal of industrial waste, protection zones

  • The method of constructing a hierarchy of criteria on the basis of ontological analysis system

    The paper describes a method to build Jerah krietriev for solving decision making in the management of complex multivariable systems based on functional decomposition . The result of functional decomposition takes the form of an ontology -based posnroennoy deskriptinvyh logic to build a hierarchy of concepts. The advantage of this method is the ability to use it for semi-structured systems. The result of the ontological analysis of the functional structure of the system is the taxonomy, including a description of the processes , organizational structures, and indicators of quality of running processes . When referring to this ontology by using the proposed request is generated hierarchy of indicators , based on the processing of values ​​is carried out and decisions .

    Keywords: ontological analysis, systems analysis, ontology, descriptive logic

  • Computer simulation of visual grouping mechanisms selective to spatial modulations of contrast

    This paper outlines the implementation of computer model of second-order visual mechanisms that are specific to spatial contrast modulations, and represents the results of testing the model. Computer simulation is based on "Filter-Rectify-Filter" model with some important additions. The inhibitory parts of receptive field of simulated mechanism are non-selective to orientation and spatial frequency of texture elements. Texture modulated by orientation or spatial frequency does not reduce flank inhibition and does not activate the mechanism. Unmodulated texture  also does not cause activation of the filter because the flanking inhibition will be equal to or exceed the excitation. However, increasing the contrast in the center and reduction it on the flanks leads to the activation of the second order mechanism.

    Keywords: Second order visual mechanisms, image filtering, texture, spatial modulation, computer simulation

  • About research of the onboard integrated control system by aircraft with correction of coordinates

    The work is devoted to the study of algorithms of control subsystem as part of the integrated onboard control system of the aircraft and used in the final part of the trajectory. Algorithms of control subsystems are synthesized on the basis of the theory of optimized delta-transformations of the second order using the principle of the inverted pendulum on a cart. The studies based on the simulation using the developed software model, allowed to estimate as the impact dispersion, and the contribution to it of various subsystems.

    Keywords: terminal control, aircraft, on-board integrated control system, optimized delta transformation of the second order, autonomous short range radionavigation system, simulation, software model

  • Term of self-bearing fiber-optical cable electrical conductance. Experimental information

    In the article authors examine specificities of internal components behavior changing in fiber-optical cable under influence of strong variable uniform electromagnetic field. There are some process variations proposed for describing of obtained results.

    Keywords: fiber-optical cable, electrothermal degradation, kevlar, conductivity, open fiber-optical cable, partial discharges, water treeing

  • Comparative analysis of the syntactic parsers organization

    The article describes peculiarities of modern syntax parser systems and problems originating in text analysis. As a result of comparative analysis the authors propose a unified approach to processing of unstructured texts in Russian and English which combines morphology and syntax processing. The developed syntax analysis system, using verbs’ valency dictionary, samples of minimal structural schemes of sentences and samples of conjunctions, allows choosing predicative structures of sentences in the text, realizing initial semantic analysis due to semantic content of predicate’s actants and building trees of syntactical subordination of sentences. The derived trees hold elements of tree of constitutives and tree of dependences. The proposed samples and rules organization allows resolving some of the problems of modern parsers. And the use of verbs’ valency dictionary allows reducing the number of sentences syntax analysis variants.

    Keywords: automatic text processing; syntax parser; morphological analysis; structural text elements

  • Experemental researches of the receiving modes of a rough metal surfaces in vacuum arc discharge

    In this work experimentally investigated the possibilities of the new method of obtaining adjustable roughness on metal surfaces electrothermal influence of mobile cathode spots in vacuum arc discharge. Presents the results of processing of various surfaces using this method. Proposed working modes of processing of metal surfaces with the aim to receive as minimum and maximum roughness.

    Keywords: roughness of metal surfaces, vacuum arc discharge, cathodic spots

  • Rationale for ways to increase efficiency operation of logging truck

    An analysis of the problem of increasing the efficiency of the functioning of the logging trucks for hauling timber to the lower timber depots and consumers. Proposed technical solutions for of raising cross-trains in complex natural and industrial environments.

    Keywords: Active semi-trailer used forestry, passableness, prosary operation.