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  • ThThe application of information technology in teaching electrical disciplines

    Article is devoted to the Organization of educational process on discipline "theoretical bases of electrical engineering" at the Department of theoretical and general electrical engineering» NSTU. R.e. Alexeev.  Methodology for teaching the TOE using information technologies developed and tested.  Using  Mathcad and Matlab package gives the best effect in teaching.  The developed method of learning offers a direct use of information technologies in all organizational forms of education.  The efficiency study of theoretical material is enhanced by the use of multimedia lectures on discipline. Mastering the techniques of mathematical modeling in computer mathematics package Mathcad environment occurs in practice. It is in the description of a mathematical algorithm of problem solving. Students describe the mathematical algorithm of problem solving.
    Modelling of processes and objects by using the schema of replacement is a Matlab package and MULTISIM ANALOG DEVACES EDITION during laboratory work.  

    Keywords: training technique, information technology, theoretical bases of electrical engineering, mathematical packages, MATHCAD, MATLAB и MULTISIM ANALOG DEVACES EDITION, multimedia lectures.

  • The synthesis of inhibitory quasi-fields of obstacles for SUGV on-board path planning system.

    The article presents an approach to synthesis of inhibitory quasi-fields of obstacles for SUGV on-board path planning system, algorithmic basis of which is an adaptive control method for intellectual robots. The inhibitory quasi-fields of obstacles are used for path optimization by safety criteria.

    Keywords: Robotics, SUGV, local navigation, path planning, trajectory optimization

  • Electrobiographs of Rostov in the early twentieth century: technology and people

    This article is devoted to emergence and development of cinema on Don Region. Attention paid on the first picture theatres in Rostov-on-Don, Taganrog and Novocherkassk and their technical equipment (bioscope, biofonograf, teatrograf cosmography, vivantograf, fonohromoskopograf). In this research submitted the first main films and reaction of society and governance on them. As special aspects of cinema industry development viewed problems of professional cinema community and main tendencies of that sphere of cultural life 

    Keywords: cinematograph,еlektrobiograf, technology, cinema, picture palace,full-length film, a silent movie, spirituality, development trends

  • Special features of mechanochemical activation Al-Si mixture and the formation of hot-deformed powder material based on the mixture

    This paper presented the study of the mechanochemical activation powder mix in dry and liquid grinding media, accompanied by agglomeration of the particles. It Is shown that when agglomerate particles having a bimodal size distribution is forming during the treatment in a dry grinding media and partially (2 wt % ) decaying at grinding by pestle in mortar. The transition to liquid grinding media is leading to a unimodal size distribution and increasing dispersion of the agglomerated particles, characterized by secondary agglomerating when using the alcohol and destruction when using activation in saturated aqueous solution of boric acid. Inherited effect mechanical activation parameters on the compaction process during cold compaction and hot stamping has been determined. Application treated in a high energy mill in an grinding media saturated aqueous H3BO3 Al-Si powder mix results in the formation of moldings with low cold-pressing relative density (0.735) and the activation of the hot stamping compaction (|εh| = 0,592) providing production of hot-deformed powder material with increased mechanical properties.

    Keywords: mechanochemical activation, hot-deformed powder material, aluminum, silicon, dispersion, agglomeration

  • Developing a model for calculation of the stress-strain states in semiconductor structures due to laser processing

    A model is presented for the calculation of thermoelastic stress and displacement  in semiconductor structures
    due to laser processing. Developed software based on the model allows to determine the optimal parameters of laser processing with taking into account the physical and topological parameters of the structure. The model is divided into two tasks: the non-stationary heat  conduction equation is solved, and the equilibrium equations and Hooke's law. For equations solution was used the finite difference method.

    Keywords: Laser processing, thermal stress, finite difference method

  • Modeling of three-level vertical marketing system

    An original mathematical model describing different activities of actors in the vertical marketing system is presented. They are a provider, a agent, a trading enterprise are presented as a controlling subjects. The model is based on the game-theoretical and hierarchical approach. An equilibrium of Germeyer G1 game in terms of sustainable development is established. The method of impulsion is used as a method of hierarchical control to solve this model. The main system operation laws based on numerical experiments are presented.

    Keywords: game theory, hierarchical, three-level control system, method of impulsion

  • The classification soil and groundwater conditions as an important factor of a selection of types and designs of machines for clearing forest areas during the building of line objects

    Questions of the classification soil and groundwater conditions  were considered as an important factor of a selection of  types and designs of machines for clearing forest areas from a tree and scrub vegetation. Taking into account the executed analysis the classification of the conditions was proposed the application of machines for clearing the forest area.

    Keywords: Tree and scrub vegetation, soil and groundwater conditions, clearing the forest area

  • The determination of cadastral cost of agricultural land taking into account the land limits (charges)

    The article presents a method of accounting land limits (charges) during the cadastral valuation of agricultural land. This allows us to differentiate the cadastral value , depending of presence of protection zone,  water protection zone and on other zones on the  lands. Cadastral cost of agricultural land on the example of Leningrad region counted. Determination of cadastral cost on the basic presented coefficients will reduce the land tax on the territory which include restricted mode zones of use. It will increase the objectivity of cadastral evaluation.

    Keywords: cadastral evaluation of land, agricultural land, land limits, analytic hierarchy process of T.Saaty

  • Spatial organization grouping signals in associative processes of artificial neural networks

    The article discusses issues related to the development of the optimal structure of neural networks. One of the major problems in the synthesis neural conrollers is ensuring optimal number of neurons and connections between layers  in the network. Necessary to achieve a compromise between the representational network capabilities, and memory that will be required to store it. The article presents a number of heuristics, allowing to reach such a compromise by limiting the number of connections for each neuron.
    This is done through the introduction of two characteristics for the neuron: the radius of the coverage and density of connections. Coverage radius determines the number of neurons that could potentially have a connection to this neuron, and the density of the compound gives the actual number of such compounds. Altogether, these characteristics determine the amount of synaptic connections, which can have a neuron. The article presents the heuristics that allow to define these characteristics depending on the network structure.  

    Keywords: neural network, neural controller, associative memory, machine learning, optimization

  • Morphological analysis locating chart and of the roller for grinding spherical ends taper

    A new classification  of  criterions methods of the setting-up roller for grinding spherical ends. Structural analysis of the locating charts and the search for new technological schemes and possible implementation on the basis of morphological method using the proposed criteria. Identified basic directions of  evolution of the technology of grinding spherical ends roller.

    Keywords: bearing, taper roller, spherical end, base, locating, locating point, locating chart, setting-up.

  • Calculations of the characteristics of a systemic in transport and logistics cluster

    Using the expression for the dynamic model calculations were performed, identified analytical and graphical relationship between resistance, systemic and the number of enterprises - participants cluster associations to characterize the sustainability of transport and logistics cluster to fluctuations in external traffic

    Keywords: transport and logistics cluster, the dynamic model of stability

  • Mathematical model of straining of orthotropic conical shells

    The article presents a mathematical model of deformation of thin-walled conical shells, considering orthotropic material, geometric nonlinearity and transverse shear. Showing geometric relationships, physical relationships, the functional of total energy of deformation and boundary conditions.

    Keywords: conical shell, tapered panel, mathematical model, geometric nonlinearity, orthotropic, lateral shifts

  • Mathematical model and optimization of parameters of work of a lamellar recuperator

    Use nonconventional and renewables has important economic value for energy saving. Lamellar recuperators are applied to a reuse of heat of departing air in system of ventilation of buildings. Its functional mathematical model is developed for increase of energy efficiency and optimization of parameters of work of a lamellar recuperator. On the basis of mathematical model the criterion of optimization is defined and optimum modes of functioning of a recuperator of ventilating air are established. As a result of researches it is established that the heating of external air is necessary for increase of overall performance of a recuperator before an entrance to a recuperator. For the solution of this task it is offered to use soil the heat exchanger.

    Keywords: mathematical model, lamellar recuperator, nonconventional power sources, optimization, energy saving

  • The main scientific directions in the study of problems to ensure the competitiveness of tourist and recreational industry and spa services

    The main issues of competitiveness, assess the quality of services, pricing strategy, especially sales service, new services, cost accounting and auditing in the tourist and recreation industry

    Keywords: competitiveness, quality of services, audit, pricing strategy, marketing, tourist and recreational industry.

  • The propagation technology of Chinese Cedar (Platycladus orientalis (L.) Franco) for green building in Rostov region.

    The main methods of Platycladus orientalis seed propagation are studied. For Platycladus orientalis industrial cultivation the following technologies of reproduction are recommended: For off-sort samples – seed propagation after stratification (25-30 days); For sorts and decorative forms:
    1.Vegetative propagation using IAA.
    2. Micropropagation of Platycladus orientalis in vitro by means of adventitious shoots induction on the MS medium adding 0,2 – 0,5 mg/l BAP. There are derived well rooted microshoots on the medium with IAA in concentration 5 mg/l.

    Keywords: green building, Platycladus orientalis, technologies of reproduction, clonal micropropagation.