In this paper, based on Darcy equations that govern the lubricant in porous layers , and the modified Reynolds equation in the framework of a short bearing solve the problem of unsteady motion of a viscous incompressible lubricant in the bearing clearance double-layer porous . Here we consider the case when the permeability in porous layers in the axial direction is changed by the normal law , and the combined feed lubrication is performed simultaneously in the axial and perpendicular to the bearing axis directions. As a result, the pressure field found in porous layers and in the lubricating layer and analytical dependences for the efforts of the oil film . Compiled by the equation of motion tongue and solved the problem of the stability of the unsteady motion of a pin bearing , found that in the case of a combined bearing lubrication working more steadily compared with the cases or axial directions perpendicular to the axis lubrication . The results obtained can be offered for the development of cylindrical dampers with double-layer porous collar , effectively attenuating transmitted force imbalance in the combined feed lubrication.
Keywords: two-layer porous plug; permeability porous layers, load capacity; equation of motion of the stud; stability
Maximum power pointtracking algorithms are widely used in the solar converters in order to obtain maximum power from the solar array. The article provides a brief description of the work of these algorithms, description of the method of testing based on mathematical modeling using Matlab, Simulink and SimScape packages. The results of modeling and comparative analysis of the studied algorithms, its strengths and weaknesses revealed.
Keywords: maximum power point, maximum power point tracker, photovoltaic, buck converter, comparative study of algorithms, perturb and observe method, constant voltage method, constant current method, icremental conductance method
A long term study of compensation converters allowed to solve the task of designing the structure, the calculation of its elements, the determination of static characteristics and energy performance. Thus remain undeveloped algorithms of their work to ensure a successful use of compensatory converters and independent control of active and reactive power consumption. An algorithm of their work to ensure the optimal use of compensatory converters. This article contains material from GC № 16.526.12.6016 11.10.2011.
Keywords: Site load electric network compensation converters; management algorithms ; controlled electric drive with compensation rectifier in section of the direct current of the converter of the frequency
The current system of intergovernmental fiscal relations , the trends of its development in Russia , including the alignment process , aimed at smoothing the territorial differentiation of socio- economic development of regions. The main task of any state , regardless of the device is to smooth regional disparities through a reallocation of financial resources. In this case, the stability of intergovernmental fiscal relations between the federal center and the subjects of the federation is largely determined by well-functioning system of fiscal federalism. Currently, the budget process is characterized by serious contradictions that arise during the development phase as well as on the stages of implementation of management decisions. Global experience demonstrates the lack of an optimal model of intergovernmental relations . Vertical alignment is the process of achieving a balance between the commitment of each level of government expenditure with the potential of its revenue sources . The tools include the vertical alignment of the fixing of taxes for a certain level , subventions and subsidies, regulating the distribution of income. The horizontal alignment is aimed at providing a unified standard level of consumption of public services to the residents of different regions of the country. With reference to the Russian economic space horizontal alignment problems are quite complex , since there are strong differences in socio-economic development of the regions due to climatic and historical factors .
Keywords: Complementarily - adaptive tool, budgetary control, fiscal stimulus, active regional policy, economic growth, macroeconomic development
In persisting article is offered structure and functional composition of the programme modules of the tools of the analysis dynamic mechanical systems of the class tooth issues. In change from existing, proposed programme complex contains the extended composition of the modules. This enables, in particular, check convergence iteration computing processes, way to visualizations of the current importance of the full kinetic energy of the fluctuations of the under investigation mechanical system. The broughted composition each of block of the programme complex, with detailed description of the purpose included modules into them.
Keywords: The mechanical system, tooth issue, modeling, programme complex, dynamic of the system
Fe-doped AlN nanorods were studied by means of x-ray absorption spectroscopy above the Fe K- and L2,3- edges. Theoretical simulations of the x-ray absorption spectra show that Fe atoms mainly substitute Al. A minor fraction of Fe interstitials or Fe-Al-N ternary alloy can be identified as well. Bader’s AIM analysis predicts that neutral substitutional FeAl defect is in 2+ charge state, though Al in pure AlN is in 3+ charge state. Fe L2,3 absorption spectra and photoluminescence data indicate the coexistence of Fe2+/Fe3+ in AlN:Fe nanorods so different charge states of substitutional FeAl should co-exist.
Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production
The advanced multispectral method is developed for formation and recovery of the image of a hypodermic on the basis of function of a detuning and its algorithm realizing. The method reduces distorting influence of change of characteristics of skin on image formation. Use of function of a detuning allows to make processing without observance of rigid requirements to the accuracy of a choice of lengths of waves on which images and, respectively, providing a preset value of the relation of values of optical thicknesses of skin are formed.
Keywords: Restore images, multispectral method, the function of detuning, the optical thickness, the reflection coefficient
This article reviews systems of respiratory activity registration in relation to sports medicine. Attention is devoted to the use of miniature accelerometers that record the movement of the chest, as the optimal method for the diagnosis of the respiratory parameters. Other methods are based on piezo-resistive sensors, pressure and airflow sensors, and airways resistance sensors. The authors' developed device based on three-axis accelerometer is proposed. It recognizes episodes of apnea with sufficient accuracy for long-term monitoring. The algorithm of the accelerometer data processing is described. In order to minimize noise impact on the useful signal it is necessary to transform the three-dimensional cloud of accelerometer data into a flat sector. Then the relation of gravity vector deviation angle and the nominal position in time is determined. This presented device due to its ability to transmit data via Bluetooth technology, after appropriate software development for mobile phone and the receiving terminal of medical professional, will be able to organize a simple ergonomic long-term remote monitoring of respiratory activity.
Keywords: systems of respiratory activity registration, long-term remote monitoring, three-axis accelerometer
In article the structure, functional architecture and mathematical model of the system intended for automated management by information procedures in the automated information system are considered. The offered model is based on monitoring of initial and flowing conditions of the information streams subjected recomposition on the basis of operating markers by the serving router. A system kernel is the Server of configurations supporting discrete disciplines of management by service.
Keywords: information service, priority management, an information stream
In this paper we study of the local atomic and electronic structure of nanostructured condensed material for rechargeable current sources on the basis of 15mas.%V2O5/Fe/LiF nanocomposite within charge-discharge cycle. Principle component analysis (PCA) of the series of Fe K-edge spectra collected during 1 st charge showing the concentrations of the components Fe, FeF2 and V[FeV]O4. We found the changes in the V oxidation state from the analysis of the experimental Fe K- and V K- XANES spectra. Total and partial density of states of components are presented.
Keywords: nanostructured materials for rechargeable current sources, dynamics of local atomic and electronic structures, XANES, DFT
The catalytic activity of Pt/C and PtxNi/C electrocatalysts prepared by borohydride methode was studed. It was established that the specific activity of fresh prepared Pt3,7Ni/C catalyst in oxygen electroreduction reaction is higher in compare with Pt/C material. After treatment of Pt3,7Ni/C material in the hot acid nickel in the surface layers of nanoparticles was dissolved and the composition of nanoparticles was changed to Pt5,6Ni. The electrochemical surface area of the Pt5,6Ni catalyst and specific activity was slightly decreased after corrosion treatment.
Keywords: platinum electrocatalysts, corrosion stability of the nanoparticles, fuel cells, X-ray diffraction, borohydride synthesis
The article deal with technological scheme of mandatory access control in the operation of MFIs in relation to the three main processes of microfinance: a preliminary contact with the customer on how to receive the micro-loans, micro-loans directly formulation and monitoring of the obligations of the parties (especially financial) to the contract. The above scheme is based on the international standard for the organization of the Open Systems Interconnection.
Keywords: mandatory policy, the MFI, access control, process, microfinance
The problems of building the architecture and design of the database structure for the storage of the structure of the chemical compounds and their analysis using heuristic algorithms
Proposed the structure of the database that allows you to store information about the structure of chemical compounds with varying degrees of detail. This approach simplifies forming of the structural descriptors used to build models of "structure-property" based on the genetic algorithms.
Keywords: database architecture, chemicals, data mining, heuristics
This paper examines the effectiveness of the software framework developed by the authors for the task of sonar information systems software design. This is done by a theoretical estimate based on the data obtained during the actual production process, as well as practical by rebuilding the software using the skeleton. Fixed a set of indicators on which to judge the complexity and evaluated there . Finally, an assessment of the results of the experiment and draw conclusions about the direction of further research.
Keywords: software design, sonar information systems framework, performance evaluation
Considered the proposed approach to the allocation of resource flows. The approach developed on the basis of the method of bee colonies. Experimentally determined the dependence of the error of the algorithm of the problem dimension. Shows the dependence of the distribution of resources from a number of iterations, and the power of the swarm, and dynamics approximation of the distribution to the optimum.
Keywords: optimization, distribution, collective adaptation, evolution, the error of the algorithm