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  • Method of eliminate empty traffic in TDM technology

    Time Division Multiplexing is the one of the main information transmission technology. Main problem of this method is the large amount of empty of traffic. This number can reach about 97%. In article presents a method for reducing amount of empty traffic by using the new system pointers, that encode information about the frame . Pointer consists of three components : a pointer to a smaller source (points to the source that gave less information ), a pointer to a smaller amount of information and a pointer to the source memory block (points to the memory block , where the frame was formed ). This pointer is generated when creating a frame and is written in the first data slot. After transmitting a frame pointer is decoded, and based on this information, the distribution of data occurs on the output signals. The developed method has several advantages over similar methods of data transmission, does not depend of the speed of data sources, and have minimum depends on amount of input signals. This technology allows to fill information cells only useful information, and improve the efficiency of code up 96.6 %.

    Keywords: Time division multiplexing, traffic reduction, statistical multiplexing, static multiplexing, frame coding

  • 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

  • Nonstoichiometry and electrochromism of oxides and polyalkaline tungsten bronzes

    Nonstoichiometric tungsten oxides WO3–x and oxide alkaline tungsten bronzes have been studied because of their potential applications in electrochromic devices such as solar panel arrays and “smart windows”. Different phases of 
    WO3–x have been considered. In this part we present results of our research which clearly show that all Magneli phases of tungsten oxides  WOx (namely W40O118, W20O58, W5O14, W18O49, W8O23, W3O8) and oxide tungsten bronzes MxMyWO3 at M-Li, Na, K, Rb, Cs. They are characterized by metal – like properties. Their band structures display an energy gap in the valence band just below the Fermi level.
    We present results of our electrochemical synthesis of tungsten oxide bronzes in ionic melts of the polytungsten salts. Among the new state – of – the art methods for their manufacture, electrochemical synthesis in ionic melts, which  makes considerably better use of existing technologies, is highly productive, based on the discharge of oxyanions of the polytungstates.  

    Keywords: oxide alkali bronzes, alkaline tungsten bronzes, tungsten, molybdenum, nonstoichiometry, tungsten oxides, electroconductivity, electrochromism

  • Perfomance prediction of ladge dimension random number generators anlgorithms implementations on reconfigurable arcitectures with coprocessors

    This article discusses problem of improving performance of large dimension random number generators. With current trends , as an accelerator for CPU considered field-programmable gate array ( FPGAs ) . The analysis of hardware implementations of algorithms of random number generators offered by the Altera company is carried out. It is offered to use a method of calculation of a gain of productivity Reconfigurable Amenability Test (RAT) offered by B. Holland, K. Nagarajan and A. D. George. Assessment of several random number generators is made by this method. Received results it is analyzed, and on the basis of the drawn conclusions, simulation of the algorithms showing a high rate of a gain of productivity is made. Results received theoretically and during simulation are compared.

    Keywords: Reconfigurable amenability test, field-programmable gate array, random number generator, high-performance calculating performance prediction

  • A method for controlling the quality of the blocks of granite rock acoustic NDT methods

    This article outlines the rationale and relevance of the theme of its relevance in a real production. A brief description of the object of research , as well as the causes of the defects of the object. Later in the article describes the methods used to conduct the study , describes the applicable non-destructive and destructive methods . Describes the results obtained in the course of work , methods of mathematical processing , obtained correlations . The graphs dependencies. Next, a method developed that allows for quality control.

    Keywords: granite, nondestructive testing, destructive testing, careers, ultrasound, natural frequency, correlations

  • Monitoring and mathematical modeling of microbial air pollution near highways Volgograd

    The aim of this work was to conduct monitoring and make a regression model of the microbiological air pollution in Volgograd near highways. The work carried out monitoring of microbial air pollution in the residential district of Volgograd near two major highways - first and second longitudinal lines. On the first phase of research the microbial monitoring of air pollution in the residential district of Volgograd was conducted, depending on the proximity to the highway. Number of microbial cells (MC) was evaluated by sedimentation. The assumption is made about the nature of the regression relationship between microbial air pollution and the distance from the highway. Approximating functions and regression coefficients are constructed for the first portion of the longitudinal line at different levels of traffic road. Function is obtained, which allows to calculate the value of microbial contamination of the air, depending on the distance to the road and number of vehicles. In the case of high levels of the microbiological monitoring of the basin air it’s necessary to carry out measures to reduce microbial contamination of the air, for example, regular watering roads, tree planting, vegetative barriers adsorbing pollutants, chemical treatment of disinfectants. The calculation of microbial contamination of the air near a residential building located at a distance of 10 meters from the highway in the central region of Volgograd is conducted using proposed in function prediction of microbial contamination. The developed technique allows us to make calculations without setting up experiments in a specialized microbiology laboratory.

    Keywords: monitoring , microbial contamination of air , the regression model , mathematical modeling

  • Comparative analysis of theoretical and experimental research full-scale arches from glued wood

    The results of testing full-scale triangular arch span 12 m Arch loaded jacks lifting capacity of 20 tons per quarter of the span concentrated forces transmitted through the steel belts to traverse the arch. Arch deformation sensors fixed resistance, dial indicators and deflectometer. According to test results graphs plotted strains, as well as diagrams of normal and tangential stresses.

    Keywords: arch from glued wood, metal triangular wooden arch, full-scale experiments compressed curved elements, brittle fracture.

  • Analysis of current economic mechanism of stimulation of rational water use in Rostov region

    An analysis of the current economic mechanism of stimulation of rational water use of the Rostov region, which consists of the following elements: water, expressed in the tariff policy of the region, program-target planning in the field of water use, environmental permitting and licensing of water management activities, preferential tax and investment policy, modernization and development of communal infrastructure, ecological monitoring are the main economic instruments used in each item, highlighted the advantages and disadvantages of the current economic mechanism.

    Keywords: economic mechanism of stimulation, water use, rational water use, incentives, penalties

  • Possibilities of regulation of processes of heatmoist processing in mass-exchanged devices at influence of electric field

    the problems of moisture (cooling) in the mass-transfer apparatus at different parameters of fluid spray and varying the magnitude of the influence of the electric field in the zone of the spray.

    Keywords: heat and mass transfer, mist dispersion, electroaerosol, electrostatic dissipation.

  • The alternative method of AC railways traction loads balancing

    The authors examine an alternative method of traction station load balance which needn’t capital investments for technical extension. The authors solve the task of loading partial balancing and suggest exploited transformer construction changing.

    Keywords: Balancing transformer, the coefficient reverse sequence, regulation voltage under load.

  • Calculation of the capacitance of the capacitor on the DC link active harmonic filter

    Block diagram of the active harmonic filter is considered.  State table inverter power switches active harmonic filter is considered. Calculated the capacitance on the DC link active harmonic filters. The calculation takes into account the power converter losses in the active harmonic filter.

    Keywords: active harmonic filter, distortion power, energy storage capacitor

  • Application of analog-to-digital converter in the evaluation of the thermal state of elements of the hydraulic drive

    The substantiation of the need for the preparation of thermal hydraulic drive road construction machinery (SDM) operating in the North. Given that a significant number of failures falls on hydraulic drive elements, it becomes urgent need to study their work and causes of failures. In order to analyze the thermal training funds, the development of new systems is necessary to study thermal characteristics of hydraulic drive elements SDM operated at low subzero temperatures. It is necessary to take into account the rate of change of the processes occurring in the hydraulic drive. In accordance with the above requires a quality measuring equipment, created on the basis of analog-to-digital converters. For this analysis instrumentation for experimental studies. Currently, at the Department of Transportation and technological systems developed hardware and software for temperature measurement system for monitoring hydraulic drive elements SDM.

    Keywords: construction machinery, operation, negative temperature, hydraulic, thermal preparation, measurement, sensor

  • Stability of linear delay-differential equation of milling process

    A stability problem of milling process is under consideration. A novel analytical tool is presented to assess the optimal cutting parameters which provide a chatter free machining. Chatter instability is broadly studied in the literature. However, the problem of simultaneous optimization of radial and axial depths of cut is kept out of scope. To describe the optimization method a single-degree-of-freedom model of milling process is investigated as well as corresponding equation of motion and function of cutting force. A unified delay-differential equation is proposed. A theorem of asymptotic stability is suggested. Suggested optimization technique allows to create a diagram of radial and axial depth-of-cut dependence.  As shown, there exists an extremum of function of axial and radial depth-of-cut dependence.  

    Keywords: chatter, stability, delay-differential equation, oscilations, self-excited vibrations, optimization

  • Synthesis and electrochemical characteristics of the new composite cathode material of LiMn2O4@LiCoO2 for lithium-ion battery

    The composite cathode material of the core@shell type with the LiMn2O4@LiCoO2 formula of has been successfully synthesized using the solid-state reactions in several stages. Its structure has been studied by means of X-ray diffraction, scanning and transmission electron microscopy and vibrational infrared spectroscopy. Electrochemical investigation in two-electrode cell has been showed improvement of characteristics of the synthesized cathode material than the constituent components. The specific power of LiMn2O4@LiCoO2 is 650 mWh/g, against 450 and 500 mWh/g for LiCoO2 and LiMn2O4, respectively.

    Keywords: lithium-ion batteries, cathode materials, Delafosse, X-ray structural analysis, electron microscopy, electrochemical properties

  • About the corporation questions

    The article explores the main types of organization of the corporation and management in Russia. The corporation is defined as a special organizational and economic form of business. There we identified problems, specific, prospects for the formation and development. It was investigated the features and structure of corporations , as a result of its membership of the integration processes . It was measured the economic and financial management aspects, which may be useful in the development and investment attractiveness of the corporation. The Corporation is a more complex business structure. Corporations  have certain rights, privileges, and liabilities beyond those of an individual. Doing business as a corporation may yield tax or financial benefits, but these can be offset by other considerations, such as increased licensing fees or decreased personal control. Corporations may be formed for profit or nonprofit purposes. The author gives the aspects of each formation. 

    Keywords: corporation, organization of activities, organizational and economic form, form control, transaction costs