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  • To the problem of use of economic-mathematical modeling in management and scheduling of the vertically integrated structures

      The peculiarities of models, methods and algorithms for planning and materials management in multi-tier, geographically distributed transportation and manufacturing systems. Show the direction of the development of theory in this area.

    Keywords: algorithms, vertically-integrated structure, models, planning, management

  • Determination of the area of the central projection of the family of visible segments of the controlled object

      The article deals with finding of the area of the central projection of the family of visible segments of a last set of sides of the controlled object. We offer to represent the central projection of the controlled object which is reflected on the camera's sensor, as a set of convex polygons in order to accelerate finding of the total area.

    Keywords: polygons‘segments, cameras’ field of view, an algorithm for finding of polygon’s area

  • Mathematical modelling of processes in the channel of the MHD-device with the conical axisymmetric channel

    Work is devoted mathematical modelling of processes in the channel of the MHD-device with the conical axisymmetric form of a channel. The assumptions accepted at modelling are formulated. The mathematical description of a prototype system with usage of known laws of electrodynamics is conducted. The equations of components of density of current, a magnetic field and electromagnetic forces in the conical part of the channel of the observed device are defined. Adequacy of the developed model is confirm by results of computer simulation of processes in the channel of the device. Deductions about applicability of results of the given work are presented.

    Keywords: MHD-device, conical axisymmetric channel, density of current in the channel, mathematical model, electromagnetic forces

  • Local atomic structure dynamics of new nanostructured condensed materials for rechargeable current sources on the basis of V2O5/Fe/LiF nanocomposite within charge-discharge cycle

    In this paper we study the dynamics of the local atomic structure of new nanostructured condensed material for for rechargeable current sources on the basis of 15mas.%V2O5/Fe/LiF nanocomposite within charge-discharge cycle on the basis of X-ray diffraction (XRD), X-ray absorption spectroscopy (XANES) and of computer simulation. The analysis of the experimental data obtained during the first charge cycle reveals the transformation of iron to more than 50% of iron fluoride (II) , Li ions intercalate into the structure of amorphous V2O5 forming LiVO2 compound.

    Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

  • To a question on defense of the St.-Petersburg agglomeration (town-planning aspect)

    The facts allowing scientifically are analyzed - to prove participation of a town-planning science with a view of accommodation of military force in territory of the state, and in particular the St.-Petersburg agglomeration. Also problems in town-planning maintenance of agglomeration to defense are stated.

    Keywords: urban agglomerations, city, armed forces, defense, territory

  • System of the sociolabor relations in market economy

      Structural changes in cumulative labor displace the purposes of social development and generate understanding of that the economy exists for the person, and people – the main value of modern society. The evolution of the term tracked in article the sociolabor relations, consideration of elements, levels and the purposes of the sociolabor relations, the characteristic of types of regulation of the sociolabor relations and an assessment of system of the sociolabor relations of Russia allowed to add definitions of the sociolabor relations by concept «the human capital» and to define system of the sociolabor relations of market economy as a complex of relationship concerning development and effective use of the human capital. 

    Keywords: Sociolabor relations, hired worker, employer, work, human capital

  • Passive pressure sensor based on surface acoustic waves

      Proposed to use a sensor based on surface acoustic wave (SAW), which represents a delay line with unidirectional interdigital transducers (IDT) for measuring the pressure in the liquid. Reflective IDT loaded by series connected inductor and two capacities. One of these capacities - this trimmer, and another - a membrane capacitor whose capacitance depends on the pressure. When the pressure changes of the membrane capacitance capacitor, which changes the reflectivity of the reflective IDT. The magnitude of changes in this ratio determines the pressure applied to the membrane capacity.  

    Keywords: Sensor, pressure, surface acoustic wave, pulse answer, liquid

  • Problem analysis of navigation in portable scientific data representation

      Article describes actual problems of personal navigation in portable scientific document set representation. Proposed algorithm for ranking document graph paths based on machine learning, described algorithm analysis and most probable navigation context parts.

    Keywords: Document set navigation, machine learning, navigation context, scientific data visualization

        The authors propose a method for determining the height of bus rollover to access body structure strength according to the Rules the United Nations Economic Commission for Europe № 66 (UNECE). Besides, it will allow to result in optimum value height of bus rollover with different dimensions. It is necessary to get more reliable information of body structure strength. For this purpose in procedure of tests it is suggested to enter the additional stage of calculation of the height of rollover before setting of transport vehicle on a rollover platform.

    Keywords: The bus, safety of bus construction, strength, deformation, a centre of mass.

  • Investigation of influence of adsorbtion of CO on characteristics of hold-up line on SAW with ZnO nanorods sensitive element

    Structure of  surface acoustic waves(SAW) of CO sensor was developed. SAW sensor include transceiving IDT and catoptric IDT, which is loaded on the impedance of ZnO nanorods. Peak of reflection SAW from IDT clearly observed as result Fourier transformation of time function of pulsed response. IDT loaded on resistance paralleled ZnO nanorods, which depends on the concentration of CO.

    Keywords: ZnO nanorods, device on SAW, CO sensor

  • Improving the training of drivers of vehicles of category B

    "In this article the problem of the growing number of accidents involving young drivers, which is mostly not the lack of driving skills, and lack of understanding of the consequences that entails a violation of traffic rules and to re-evaluate their own capabilities and the capabilities of the vehicle. Analyzed the topic and watch the development of information ""model program for drivers in the category."" As the car - it is a source of increased danger, therefore, a priority must be driving schools driving instruction or training of candidates for the driving test, and the education of safe driving. To this end, the article on the basis of ""model program for drivers in the category"" work program has been drawn up with the increased number of hours of both theoretical and practical courses that best meets the requirements of initial professional education of the Russian Federation for the profession ""by the driver of category B ""for the professional skills and knowledge of the driver. The proposed training program has been used to train candidates for the drivers of one of the driving schools of Tsimlyansk. "

    Keywords: Traffic accident, a young driver, driving experience, training, driving school, training, candidate drivers

  • Running inductance of circular conductors with axial density of current in the complex functional blocks

    The paper analytical method for calculation of magnetic characteristics of infinitely long circular and hollow cylindrical conductors has been proposed. The method permits: to calculate radial distribution of vector potential and induction of magnetic fields, being formed by direct current in the internal and external areas of the conductor; to determine the value of magnetic flux in the internal and external areas of the conductor; to calculate the current and flux running inductances of circular and hollow conductors; to find frequency dependence of Q-quality of cylindrical conductors and to de-fine the scales of characteristic frequencies.

    Keywords: inductance, distribution of magnetic fields, magnetic flux, Q-quality, complex functional block

  • Evaluation of finding reconfigurable computing system is able to effectively function

    The methods of evaluation of reconfigurable computing system is able to effectively function, which takes into account the structure of the problem-oriented calculators. The main mathematical tool used in the theory of discrete Markov processes and methods of game-theoretic optimization.

    Keywords: reconfigurable computing system, Markov processes, methods of game-theoretic optimization, structure of task-oriented calculators

  • Mathematical modeling methods for parameters optimization for resource efficient washing-squeezing machines

    This article proves that the parameter that determines the energy the washing process is G-factor. The authors propose a mathematical tool defining dependencies technical performance of G-factor. It is an indicator of the effectiveness of the optimization of technical solutions of embodiment washing-squeezing machines and the basis for the fundamental analysis of typical designs.

    Keywords: washing-squeezing machines, mathematical modeling, G-factor, energy efficiency, optimization solutions.

      Methods of mathematical (geometric) modelingare often used in the current research of multivariate processes and their optimization tasks combined with traditional mathematical methods of experiment planning. This simulation is carried out by methods of descriptive geometry, its practical valueis a graphical representation of the functional relationships of the quality from factors and parameters that defines a process with number of variables more than three. Definition’salgorithmsof the optimization based on the Radishchev drawingin the article are given to ensure the visibility of images and solve certain technical problems.The graphical model of the process optimization of joining parts of garments was constructed.

    Keywords: Technological process, Optimization, Modeling, Descriptive geometry, Multidimensional space, Radischev drawing, Hyperplane, Hypersurface, Algorithm, Factors, Parameters.