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  • Research of basic aerodynamic properties of crushed straw material

    A widespread technology with deep litter floor with broilers. Promising material for bedding are the straw materials. However, straw, held a simple reduction, does not meet the zootechnical requirements, in particular the recommended length of the cut should be 50 mm to 150 mm. Thus, there arises the problem of fractionation straw, obtained at harvest crops as waste. We carried out an analysis of the different types of fractional chopped straw with nodal connections without them. Studies have been conducted on the behavior of these types in an air classifier with a velocity change .

    Keywords: The straw residues fractionation aerodinomicheskie performance, fly speed

  • Comparative analysis of porous piezoceramics modelling by effective moduli and finite element methods with experimental data

    The results of computational experiments to determine the characteristics of the porous piezoelectric ceramics based on the methodology, including the effective modules method, simulations of representative volumes on a simple random method and the method of Witten-Sander, finite element method to solve static piezoelectric problems for heterogeneous composite media and the accounting of inhomogeneous polarization near the pores are presented. A comparison of the results of computer simulation with the known experimental data for the porous material PZT-4 and its analogs is realized. It is concluded that the accounting of inhomogeneous polarization in the vicinity of porous provide the better agreement between numerical results and large number of known experimental data. Thus, for most effective constants the smallest errors are obtained for a representative volume of the porous piezoelectric material, constructed by Witten-Sander method.

    Keywords: piezocomposite, porous piezoelectric ceramics, inhomogeneous polarization, mathematical modelling, models of representative volumes, finite element method, effective moduli

  • Localization of damage truss structures using vibration damage detection method

    The question of the diagnosis of the state of building structures using non-destructive testing. These methods allow to predict the condition of structures to prevent accidents and, therefore, increase the service life of structures. The main objective of the study - assessment of changes in the vibration mode shapes method for the detection of structural damage , in the absence of forced uploading. The article describes the implementation of a mathematical method of vibration identification and localization of lesions of metal trusses . The results of the calculation for fault location triangular steel truss.

    Keywords: Vibration diagnostics, fault detection, diagnosis, construction construction spans, trusses, trusses, defect, damage, vibration, localization, identification

  • Researching a profile of potential of an electrostatic field during a blizzard in the Alp zone as potential renewable micro power source

    Tendencies of technological improvement of electronic chips led to reduction of their sizes, weight, development of functionality and decrease in power consumption. It allows us to discuss questions of developing renewable micro power sources which can provide power supply of autonomous microelectronic and micro circuitry systems for charge indication, paying attention to snow transfer, etc. 
    The purpose of the paper is researching a profile of electrostatic field potential in the mountain district which was estimated as a possible use as a renewable micro power source.
    It is found out that on windward sides of snow relieves the potential of electrostatic field exceeds three times to a similar  indicator for lee sides and is 80 V.  The potential is 3,5kV on polymeric surfaces (Nylon, teflon).   

    Keywords: snow storming electricity, electrization, potential of electrostatic field, charge, the salting, the loaded particles of snow, innovation electronics, micro circuitry, renewable micro power sources.

  • Unification bent laminated wooden structures on the basis of similarity.

    This article deals with the unification of the elements of wood as on the principle of similarity with the material counterpart. Also estimated the economic benefits of the technical parameters of Glulam. As a result of optimizing the size of these elements. Unification is held on the main criterion of similarity bearing members with the solution graphically. Resulting in optimal size sections are then calculated the opportunity cost of production.

    Keywords: unification, glued wooden structures

  • To unstable coloration centres in rear earth gallium garnets

    The coloration centres (CC) in crystals of rear earth gallium garnets (REGG): Gd3Ga5O12 (GGG), Gd3Sc1,6Ga3,4O12 (GSGG) и Nd3Ga5O12 (NGG) obtained by Chohraljskiy method, were investigated by methods of optical spectroscopy and spectral analysis in the wavelength range of 0,2-0,87 microns. In the case of keeping the samples under dark conditions, unstable CC were formed in the crystals of GGG and GSGG. The absorption maxima are at λmax1 = 0,243 m and λmax2 = 0,275 m at concentration of N ~ 1018 cm-3. It is suggested that the observed enlightenment is caused by the recharging of growth defects and occurring the energy levels in the band gap of garnets. It appears that these CC correspond to centres of O- holes, originated from gallium vacancies V3-Ga 3+ in tetrahedral and octahedral nots which form near clusters of [V3-Ga 3+ - V2+O2- ]

    Keywords: color centers, rare earth gallium garnets, kristylly, Czochralski method, the crystal lattice

  • Development of communications and sale of production and services of a restaurant network with use of IT-technologies (experience of modeling and design of the multipurpose website). Part 2

    Results of research and design of system of communications and sale of production and services of a restaurant network with use of IT technologies and the multipurpose website providing favorable prospects of preservation of business, its steady growth, diversification, differentiation and customization of products and services are given. The complex of design actions and results of modeling of risk management are described at development and deployment of Internet technologies and the multipurpose website in production and administrative activity of a network of restaurants, design, advance and site operation. Work is performed with financial support of the Ministry of Education and Science of the Russian Federation within the Federal target program "Researches and Development in the Priority Directions of Development of a Scientific and Technological Complex of Russia for 2007 - 2013".

    Keywords: organization and management of the project, communications, IT technologies, models, modeling, multipurpose website, network of restaurants, organization and management of restaurant, site advance, instrument complex

  • Plane strain elements cylindrical structures under the action of physical fields

    Considered concrete cylindrical body in axisymmetric formulation (plane strain condition), exposure to radiation and temperature effects. The influence of physical fields on the mechanical characteristics of the material of the body individually or in the aggregate. It is shown that the stress-strain state of the cylinder, under the joint account of the different physical fields, is very different from the stress-strain state, obtained by summing the individual results of the calculation of each factor separately, that is, the superposition principle is not respected.

    Keywords: temperature field, radiation, stress-strain state of the cylinder, the change of physical and mechanical parameters of the body

  • Determination of optimal cutting parameters are 10H12NVMFA

    A number of tests in cutting setup alloy 10H12NVMFA fulfilled. A number of studies for specification of process gas (oxygen) impact on cutting speed, also of cutting speed impact on cutting width were performed. Optimal cutting parameters specified experimentally.

    Keywords: laser cutting, cutting speed, cut sidewall, oxygen pressure, capacity

  • The introduction of a new method of traffic light control on the road network of modern cities

    Traffic light control for urban road network has for several decades been one of the most important areas of study and application in order to ensure maximum efficiency . During this time he developed a variety of techniques and tools , a lot of research . But with the ever increasing number of cars and , as a consequence , poor road conditions and increases in the amount of traffic congestion , require more and more new and advanced techniques that would have allowed not only to solve the existing problems , but also to predict the possible developments in the future. Traffic congestion on the road network of the city continues to be a growing problem of modern cities . Possible reduction of traffic congestion can be achieved either by the constant increase in the volume of road surface, or by reducing the demand for personal vehicles . If we assume that the improvement will be achieved by increasing the number of roads , it is possible to face the fact that it is not always feasible , given the current road infrastructure . Accordingly , it follows that it is necessary to focus on the use of traffic management to reduce congestion and subsequent increase in urban transport mobility .

    Keywords: traffic light control, traffic property facilities, traffic flow, traffic lights, traffic mobility

  • Advantages of application of new icestorm composition above the traditional sand-salt mixture on the objects of travelling economy

    The article is devoted to the comparative analysis of the applied traditional sand-salt mixture on the base of chloride natrium and sand and new icestorm composition on the basis of natural minerals: chloride magnesium (bischofite) and glauconite. Advantages of application of the ecological composition are educed on the objects of travelling economy on ecological, sanitary-epidemiology and technical indexes. The reagent on the basis of natural materials will promote safety of travelling motion.

    Keywords: icestorm reagent, sand-salt mixture, objects of travelling economy, ecological, technical safety

  • Experiment planning on thermal power plant fly ash collection in elektrocyclone

    The article deals with the design of experiments for dispersed particles capturing in elektrocyclone. The autors gives planning matrix calculation, the regression equation based on the aerosol velocity and the initial concentration of the aerosol and plot of function.

    Keywords: gas cleaning; cyclone; elektrocyclon; fly ash

  • The analysis of emergencies on linear part of the main gas pipelines.

    In article statistical data on failures on a linear part of the main gas pipelines are presented, the reasons of their emergence are defined. Standard scenarios of development of emergencies are provided, and also the basic principles of determination of frequency of emergence of failures are shined.

    Keywords: accident, analysis, diameter, linear part of the main gas pipelines, depressurization, scenario, pipeline.

  • Model of micromechanical mirrors mobile elements balance with internal suspension

    The model of micromechanical mirrors mobile elements balance is developed. The received results of modelling of a micromechanical mirror are considered. 

    Keywords: microsystm technology, element base, model, modeling, mirror

  • Justification of different cleaning schemes of grain cleaning machine, in produiction seed material in multibranches agriculture enterprise

    One of the main and most relevant and profitable areas of agricultural production - produce quality seeds in the farms, in the process of post-harvest grain processing. Was evaluated basic parameters of the separation process on the existing scheme sieve winnowing machine with certain technological characterization of the purified grain material according to the different conditions of separation, the possibility of defining a predetermined fraction of a feed and seed quality of purified material. Synthesis was performed variational various separation schemes and functioning to identify optimum operating parameters. According to the results of the experiment set technological possibility and the main characteristics of the process producing high-quality purified fraction of the material given by the scheme, which provides the best performance.

    Keywords: grain material, fractionation, modeling, cleaning of grain