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  • Developing of the algorithm of maximum flow of minimum cost finding in a fuzzy dynamic network

    The article considers the problem of maximum flow of minimum cost finding in fuzzy dynamic transportation network. The relevance of the problem is in its wide practical application on the rail, air, sea and other roads in finding of routes of minimum cost. The feature of the problem statement is that fuzzy nature of the network parameters, such as arc capacities and costs is taken into account. It allows us to make decisions more sensitive to environmental changes. The dependence of network parameters from flow departure is also considered, that allows to introduce the notion "dynamic" network as opposed to "stationary-dynamic", examined in the literature. The algorithm for solving the described problem in fuzzy conditions is proposed. To illustrate the algorithm a numerical example is presented.

    Keywords: dynamic network, maximum flow of minimum cost, fuzzy numbers, arc capacity, transit time

  • A New Hybrid Table/Analytical Approach to MOSFET Modeling for Cryogenic Technologies

    In this paper, a new simple and accurate hybrid table/analytical model of the MOSFET drain current based on the interpolation of table parameters is proposed. This new hybrid table model has an accuracy similar to the pure table models but requires no complex parameter extraction. The drain current in the hybrid model is calculated as the product of the analytical model current and the correction factor approximated by two-dimensional series.

    Keywords: MOS-transistor, MOSFET parameters, cryogenic temperature, parametric identification

  • Analysis of time series with cig fractal processing

    Briefly discussed the theoretical model of the spectrum of RR intervals and its changes depending on the processes taking place. Made a device for measuring cardiointervalogramms (CIG). Obtained from the renting of data, of varying duration and frequency shall be recorded for further processing. The analysis revealed that the resulting spectrum satisfies the conditions considered in the theoretical model, and can be further analyzed with fractal characteristics. Such an analysis is of great importance in the diagnosis of the patient directly to the duration of the therapeutic procedure for the optimization of both time and intensity exerted influence.

    Keywords: CIG; fractal series; the spectrum of RR intervals

  • Application of the discriminate analysis for classification of EEG of patients by diabetic encephalopathy

    One of the most widespread endocrine diseases in the world is diabetes therefore its true diagnostics, and also diagnostics of its complications (encephalopathy, complications in cardiovascular system, etc.) is always actual. During carrying out research the analysis of psychological testing of examinees was carried out. Also in this work the attention is paid to application of methods of the statistical analysis for classification of EEG of patients by diabetic encephalopathy and healthy examinees. The most informative indicators of EEG reflecting cognitive functions of a brain were revealed. The interrelation of results of psychological testing and EEG analysis is established.

    Keywords: electroencephalography, diabetic encephalopathy, discriminant analysis

  • Prospects for the use of genre classification of Web documents in search engines

    The paper discusses possible options for the use of genre classification results of Web documents in search engines. The proposed methods can improve the quality of search engines.

    Keywords: Web document classification, text documents, search engines, search engine results page, search quality, diversity

  • Functional hemodynamic test for endogenous factor influence investigations on the vessel occupancy

      The superposition conception of endogenous factors influence on the hem lymphatic occupancy in the organism vascular system is presented. The main influence factors creating the wave modulation on the pulse blood and lymph flows in the vessels and liquid’s moving in the around tissues are considered in the physical model. On the basis of the model is justified hemodynamic functional test with dosed compression effects on local areas of the body, in which the reaction is analyzed for changes in the spectrum of signals related to the changes exhibited by volume-dynamic changes in the vessels. Shows the functional scheme of the formation of the wave changes hem lymphatic, allowing planning of the study.

    Keywords: Hem lymphatic occupancy, endogenous factors, compression action, spectral analyzing of signals

  • Methods of determining the quality of a comprehensive assessment of complex technical systems in motor vehicles and material handling equipment

    The article describes one of the possible approaches to the investigation of a technique of definition of quality indicators of vehicles and lifting-transport machines, examines the concept - combining numerical estimate of single and complex indices into a single composite index.
    The following algorithms: the algorithm of finding the functional quality systems, represented by the linear form, with varying competence of experts, the algorithm modified method, allowing to make the transition from бифакторного distribution to мультифакторному, which is important when processing expert information; algorithm modified method, characterized by greater commonality and expanding the use of standard computer programmes at the decision of problems of estimation of quality systems on a computer.  

    Keywords: The level of quality of complex technical systems, decomposition methods of technical requirements, functional quality, modified method,algorithm

  • The improved resource definition set by sampling the boom shovel

    In article the refined method of calculation gamma  percentage fatigue resource of an arrow shovel excavator for population of final volume, by means analytical method of definition parameters of Weibull distribution is offered. 
    The made computing experiment has shown that the developed method allows to receive gamma percentage value of a fatigue resource of an arrow shovel excavator by means of transition from the sample data to the population data.  

    Keywords: a resource, an arrow, shovel excavator, population, Weibull

  • High-frequency active filter units mixed SoC based on a current amplifier

    The paper shows the feasibility of using a current amplifier in the filters RF and microwave ranges. By analyzing the basic structure of the second-order level sufficient conditions for the efficient use of active elements. The examples of methodological nature and formulated conclusions of practical importance.

    Keywords: RF filter, microwave filter, parametric sensitivity, current amplifiers, functional modeline setting

  • Study of the temperature influence of internal air on temperature distribution of the heat-insulated floor surface.

    It is considered the dependence of the operation mode of floor radiant panel heating systems depending on the design parameters for the internal air  

    Keywords: panel-radiant heating, heat-insulated floor, parameters of the internal air

  • Development of generator of random numbers on the points of the elliptic curve

    The article is about generators of random numbers (GPN) constructed on points of an elliptic curve and algorithms of development irreducible polynomials over prime fields. It describes their advantages and main features. The authors analyzes the algorithm of development GPN constructed on points of an elliptic curve with using irreducible polynomials of degree three over finite fields. In this approach, calculations were made in the system of residual classes. According to the results of computer simulation shows the advantages of algorithm in speed and security of a cryptosystem.

    Keywords: the generator of pseudo-random numbers, elliptic curve, system of residual classes, cryptographic security, irreducible polynomials

  • Synthesis interpolation algorithm line segment for planning trajectory of confluent two-tier mechanism

    Considered original interpolation method of the working tool path using confluent two-unit manipulator. This method is based on the separation of the links on the master and slave and the use of polar coordinates to determine the incremental rotation of angle units. It is adapted for use calculating hardware with floating point.

    Keywords: two-tier mechanism, circular interpolation, the kinematic model, floating point operations, the static accuracy of interpolation

  • Modern status of the groundwater in the area of industrial cities Rostov region

    Reviewed the status of groundwater in such industrial cities of the Rostov region, as Belaya Kalitva, Donetsk, Kamensk-Shakhtinskiy. Identified the main sources of their pollution and priority pollutants. The causes of expansion spots dirty waters in the areas of industrial cities, education depression funnels. The conclusion about influence of a large number of technogenic factors on the change of the status of groundwater  

    Keywords: Anthropogenous influence, industrial production, ecological situation, environment, an ecosystem, the industry, transport, pollution, water objects.

  • Own compensation of noise of voltage reference in continuous compensatory stabilizers

      This paper presents a method of constructing microwave selective amplifiers, which allows control Q and voltage gain at the frequency of quasi-resonance. The presented architecture selective amplifiers for SiGe process technology have low power consumption.

    Keywords: RC-filter, good quality, controlled selective amplifier, gain, frequency quasi-resonance

  • Methods of estimating the adequacy of simulation results

    This paper describes application of different criteria for estimating parameters of traffic simulation. For comparison following methods were used: statistical methods for comparison of a flow and speed in control points of a network - analysis of variance (ANOVA), Theil's U-statistics; relationships between flow, density and speed; relationships between trip time and stop time with using two-fluid models of traffic flow. For this aim we also used concept of meta-model. In order to implement this method we need on the first step to create separately relationship between traffic flow parameters for observation and simulation data and then to estimate combined model. The paper included results of calculation  

    Keywords: validation, traffic, simulation, flow, speed