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  • Regularity and reliability is in the estimation of quality of public passenger transport

     Quality of services of public passenger transport depends on many indexes. Reliability and regularity is important indexes of quality of public passenger transport. The example calculation of reliability is considered. Conclusions on reliability and regularity of routes are done  

    Keywords: quality, public passenger transport, regularity, reliability

  • Modified gravity method in placement the distribution of port terminals rail transport technological systems

    The features of the port transport and technological systems from the point of choosing the location of the distribution terminal, as the damper areas on the directions of export cargo. The authors propose a modification values of the coefficient of proportionality fractional power function the gravitational model and introduced the term "measure transport gravity" to evaluate options for placement of distribution terminals in the transport network.

    Keywords: Port rail transport technology system, cargo traffic, distribution terminal, graph theory, a modified gravity model, a measure of the transport of gravitation factor saturation network connections

  • The analysis of on-line transaction processing systems’ model with replication of database fragments designed by using principles the cloud environment

      The model of on-line transaction processing system architecture constructed by a principle of cloud structure is considered. The mathematical model of OLTP-system as the queuing system is offered. Results of modeling and their analysis are led.

    Keywords: On-line transaction processing system, Cloud architecture, Distributed database, Queuing system

  • A new approach to provide web accessibility for the blind users based on the enhance of navigational characteristics of web pages

    Most of web pages of the Web are inaccessible for the blind users. And the main reason is a lack of the semantics at the source code (technical) level of web pages and absence of the navigational components. In this work we propose a new web page representation---multiaxial navigation model---representing web documents in the form convinient for the blind users. Moreover, we present methodology for the navigation on the model proposed, that ensure an efficiency of user mobility. Automatic transformation of a web page into the multiaxial navigation model and navigation means are realized in the Blindzilla prototype. An efficiency of the proposed concepts is proven experimentally regarding contemporary screen readers, such as JAWS, Window-Eyes, and Fire Vox.

    Keywords: web accessibility, navigation, web page, web technologies

  • Cognitive approach to the research of geopolitical processes in world regions and cognitive modeling of their development (On the example of the Black – Caspian Region)

      The article is devoted to the problem of the research of geopolitical processes on the world regions’ scale under present-day conditions. The article substantiates the necessity of their analysis with the help of the cognitive approach as an effective means of cognition of the interconnections and interrelationships within the complicated systems. With that aim in view the specifics and the stages of the cognitive modeling are given thorough analysis in the article. This type of modeling is adapted to the analysis of geopolitical dynamics on the regional/sub regional level taking into consideration its aptitudes to make prognostic scenarios of the development of the situation. The possibilities of the cognitive modeling of geopolitical processes are illustrated on the example of the situation in three sub regions constituting one (big) the Black Sea – Caspian region.

    Keywords: World regions, geopolitical processes, modeling of the complicated systems, modeling of the geopolitical processes, cognitive modeling, the program’s system of the cognitive modeling, the Black Sea – Caspian Region, the Black Sea sub region, the Caucasus

  • 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

  • Operando dynamics of the nanoscale atomic and electronic structure of materials for hydrogen storage

    We have carried out the analysis on the scientific and technological literature on methods of calculation and analysis of the x-ray diffraction, x-ray absorption and Raman spectra used to analyse the structure of the materials for hydrogen storage under realistic operating conditions. The simulations were carried out for the series of small palladium nanoclusters with embedded hydrogen. Multiscale computer modelling was used to simulate the dynamics of structure of the materials during charge/discharge phases.

    Keywords: hydrogen storage, XANES, x-ray diffraction, Raman scattering, fuel cell

  • Re-entrainment decrease in electrocyclone

    The article presents the results of experimental research of the re-entrainment reduction in the electrocyclone. The authors shows an increase in the collection efficiency of ash up to 99.5% and reduction of entrainment in 4 times when profiled elements was install  on collection electrode surface

    Keywords: gas dust cleaning, electrocyclone, re-entrainment, collection efficiency, ash from thermal power plants

      This article analyzes the condition of the vehicle driver by methods using data RR-interval time series implementing wavelet-transform. The results of the discrete Wavelet-transform with the Daubechies wavelet of the fourth order are considered.

    Keywords: wavelet-transform, RR-interval series, interval diagram

    The question of increase of efficiency of the cooling process in the compression refrigerating machines and household refrigerating appliances. Describes a new original method of cooling of the condenser vapour-compression refrigeration machines, which is due to wet the surface of the capacitor with its further blow. Shows the complexity of the theoretical analysis of the proposed method of cooling and substantiated the necessity of experimental studies of the process of cooling of the refrigerant in the capacitor. 

    Keywords: compression refrigerator, evaporative a capacitor, a new method of cooling refrigerant, energy performance, the efficiency of the cooling

  • The reasons of occurrence of interval values in mathematical models of robust research the stability of control systems

    Examines the historical stages in the development  of the theory of systems research management of the uncertainties, the reasons for they arise in the mathematical  model, this is reflected in an interval values in the transfer  function of the object of control. It is proposed algorithm for obtaining experimentally the interval of values.

    Keywords: interval values, robust stability, the transfer function, parametric uncertainty, a mathematical model of the management system

      The article contains geometric and computer simulation of helical surface corner cutter. When the geometric modeling shows how to get the analytical dependences for determination of envelope surface collection features both display the hyper surface in the hyper plane. Shows the polygonal model envelope and one of the sections of hyper surface. Computer solid modeling process forming opportunity of obtaining models srezaemyh layers and their quality characteristics.

    Keywords: Computer modeling, shaping, angular milling, helical surface

  • Increase of system effectiveness of two - stage transportation: on an example of management of a solid municipal waste

    The model of increase of efficiency of the created system of transportation of a municipal waste is presented. Need for carrying out modeling and the actions connected with reorganization of system, because of possible increase in total expenses is proved at shift of positions of reloading stations of rather optimum points owing to local conditions of the territory of municipality.

    Keywords: a solid municipal waste, technological process of transportation, two - stage transportation

  • Modeling and analysis of the demand for new transport network improving objects

    When introducing a new facility to improve the transport network, there are appear many risks. The priority is the financial riskbecause core funding for these projects comes from private organizations. Careful calculation of demand is an integral part of the development project. For the effective analysis of the transport network since the project requires a conscientious approach to the latest technology.

    Keywords: Transport network: improving objects, Transport network, Demand for transport routes, Traffic flow, Mathematical modeling of demand