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  • 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

  • Certification of qualifications as a tool for continuous improvement of qualifications of labor

    The article describes a tool for continuous improvement of qualifications of labor by measuring compliance with the existing standards of the employee's qualifications. There was done Investigation has been done of the influence of the system of certification of professional qualifications at the level of productivity and economic efficiency of an economic entity.

    Keywords: certification of qualifications, workforce, competence, knowledge, certificate, professional standard

  • Method of managing master data in autonomous systems

    Described a variety of available master data integration methods and techniques. Proposed a method for data enrichment in connected autonomous systems based on applying custom written master data access functions available via global meta catalog.

    Keywords: data integration, master data, business processes, enterprise service bus, enterprise application integration

  • 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

  • System of designing multifunctional reconfigurable intelligent sensors in educational process

    The article is devoted to the system of designing multifunctional reconfigurable intelligent sensors (MRIS), examines results of application of MRIS in development of educational laboratory test benches for monitoring of parameters of environment

    Keywords: intelligent sensors, system developing, MRIS, educational laboratory test benches

  • A description of the potential function for the more accurate equation of lines motion

    In the present work proposes a specified description of potential functions when the free spreading  in the two-dimensional turbulent flow of planning. In contrast to previous decisions, new parameter satisfies the continuity of flow when the flow flowing  from rectangular tubes on the discharging  track  

    Keywords: final line of motion, lines of equal potential, horizontal rectangular tube, diverting from the mainstream flow

  • Mechatronic measuring module parameters of the executive movements machine system

    In this paper is offered hydraulic sensor to measure the kinematic, power and energy parameters. Developed scheme and the principles of the hydraulic sensor.  Identification  on the special flow lab with real modes of the device is determined by its performance in different conditions. Approximation of the results received dependences flow and pressure drop characteristics on the speed and entrance pressure, allowed more correctly assess and describe the operation of the hydraulic sensor over the entire range of speed and entrance pressure.

    Keywords: hydraulic sensor, spilling method, flow and pressure drop characteristics, multifunction control unit.

  • Transformational training and holistichesky approach in the information and educational environment of technical University

    Questions of modernization of higher education on the basis of development of structure of the hi-tech information and educational environment of technical college are considered. Transition to new structure of the educational IT infrastructure aimed at formation of open educational system, meeting modern requirements to engineering preparation is carried out. 

    Keywords: transformativny training, holistichesky approach, the information and educational space, the integrated system

  • 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.

  • Modeling of MOSFET parameters in a wide temperature range

    The temperature dependencies of the main parameters of p-channel MOSFET model in a temperature range 20 ... 300 K are measured. The universal formal four-parametric model, which allows approximating all experimental temperature dependencies with the relative error less than 1 % is proposed. The model is intended for the MOSFETs which are applying in low-noise amplifiers of the radio-receiving devices of an optical and infrared range on astronomical satellites, radio telescopes and space observatories. The presented results can be used to simulate the temperature modes of MOSFET amplifiers in SPICE-type electronic simulators. The solution of this problem will predict uptime device when the temperature changes in the cases of emergency or extraordinary situations and also will allow optimizing the choice of refrigerant and increasing the reliability of the amplifier in the conditions of cryogenic temperatures.

    Keywords: MOSFET, MOSFET parameters, cryogenic temperature, parameters measurement, temperature dependencies

  • The parametric method of determining a phase difference of quasi-harmonic signals

    The method of digital parametric measurement of the phase shift of signals with slowly varying amplitudes of the same slowly varying instantaneous frequencies was proposed. The numerical simulations and experiments on the developed hardware and software system were carried out. The error of measurement the phase difference of harmonic signals in the experiments were not more than  0,00001 radian. The method can be used in applications where the measured value is expressed in terms of the phase difference of quasi-harmonic signals.

    Keywords: quasi-harmonic signal, phase shift, real time measurements, hardware and software system

  • Development and design of a mathematical model of an autonomous mini-board ship "Neptune"

    A mathematical model of a surface mini-ship "Neptune", including a mathematical model of the actuators. Used to identify the parameters of the mathematical model. analysis of stability and controllability of surface mini-vehicle for its mathematical model.

    Keywords: mathematical model, surface mini-ship, handling, stability

  • The computational model of hydrodynamic lubrication heterogeneous porous bearing of finite length, running in a stable transient regime of friction in a forced-feed lubrication

    To investigate the stability of the porous bearings developed computational model heterogeneous porous bearing of finite length. Given the permeability anisotropy of the porous layer in the paper the problem of stability of motion of a pin in the bearing for the two different versions of lubrication: the axial direction and in the direction perpendicular to the axis of the bearing. Obtained and analyzed the tasks identified areas of stability of motion spine.

    Keywords: porous bearing, friction regime, the permeability of the porous layer, the viscoelastic lubricant.

  • Raman spectroscopy as a method for structure analysis of individual carbon nanotubes

    In this paper a systematic study of individual single-walled and multi-walled carbon nanotubes was performed by Raman spectroscopy and high-resolution electron microscopy. We have presented the geometrical and electronic structure analysis on the examples of two tubes: individual single-walled and double-walled nanotubes. The role of different environmental effects and their influence on the final structure assignment are discussed. Moreover, we have shown that the Raman spectroscopy gives reliable estimations of the nanotube diameters and the conductivity. Given a non-destructible character of Raman spectroscopy, we may conclude that it is one of the most efficient methods for structure analysis of carbon nanotubes.

    Keywords: Carbon nanotubes, Raman spectroscopy, electron microscopy