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  • Monitoring the thermal efficiency of a regenerative air heater rvp-54

    The article discusses the methodology of assessing the technical condition of the regenerative air heater RVP-54 on power boilers Naberezhnye Chelny CHP on the basis of the results of the monitoring of the thermal efficiency. In article the algorithm of monitoring and evaluation of the thermal efficiency of regenerative air heater, allows in real time to compare actual performance with previous values and to eliminate the revealed violations.

    Keywords: Naberezhnye Chelny CHP, energy boiler, regenerative air heater RVP-54, technical condition assessment, commissioning and configuration, thermal calculation, temperature difference, heating surface, thermal efficiency, heat losses

  • Dynamic model of extrusion process in screw extruders

    The work is devoted to modeling the dependence of the temperature of the extrusion process in the melting zone on the composition of the feedstock and the rotational speed of the screw shaft. The quality of the finished product can not be determined in real time, but it depends on the values ​​of the technological parameters of the production process. Therefore, the quality of products can be controlled through the control of technological parameters. Therefore, the problem of determining the temperature dependence is an important problem. The model is obtained on the basis of experimental data from a number of alternative models. As parameters, the rotational speed of the screw shaft was used. As a criterion for the quality of the model, the sum of the theoretical model errors from the experimental data is used. As the speed of the screw shaft increases, the temperature of the extrusion process increases with a gradually decreasing rate. The resulting model of the extrusion process can be used in automatic extrusion control systems to control the quality of finished products.

    Keywords: extrusion model, screw extruder, screw speed, extrusion, finished product quality

  • Methods of analysis and structured face recognition in natural conditions

    This article is dedicated to the research of existing methods of analysis and detection of persons in natural conditions. Face recognition based on image analysis is one of the main problems in the implementation of computer vision. The systems of reference measurements allow to define and develop various methods of face detection. Practical experiments were conducted and the algorithms for recognizing faces presented by scientific schools and commercial developments were considered, and also the results of evaluations on all test sets were analyzed based on the data of graphs of truly positive values for assessing the quality and speed of using MALF. Using a detailed assessment, the effectiveness of algorithms in various aspects with respect to several attributes was analyzed. Comparing performance with varying degrees of accuracy, the advantages and disadvantages of algorithms are determined when used in various work scenarios.

    Keywords: computer vision, face detection, face detection, face recognition, image analysis algorithms, detection methods, reference measurements

  • Comparative analysis of the methods for calculating thin-walled steel beams of the C-shaped profile according to domestic and foreign standards

    The lack of standards for the calculation of lightweight thin-walled steel structures allowed low-quality producers to save on production, which endangered the people who exploited such buildings. The appearance of normative documents for the calculation of thin-walled structures entails responsibility for the affirmers of these normative documents. In Russia, such norms appeared relatively recently and the purpose of this study was to compare domestic normative methods of calculation with non-significant ones. During the presentation of the study, the concept of a reduced (effective) section of a beam when working on bending was considered. Also, the same stages of the calculation methods were noted, indicating the places where the methods differ in their opinions. The result of this study is a comparison table for the basic geometric characteristic for obtaining the bearing capacity of an effective torque element of resistance. An analysis was carried out and a conclusion was drawn on these values.

    Keywords: steel structures, light steel thin-walled structures, thin-walled beams, reduced cross-section, bending work, C-shaped profile, effective cross-section, effective area, effective resistance moment

  • Bearing capacity and survivability of the hinge assembly of the beams to the columns on 2 bolts

    In this paper, it is proposed to update the values ​​of the bearing capacity of the hinge attachment of the beams to the columns on 2 bolts. A comparative analysis of the bearing capacity of the assembly presented in the 2.440-2 release 1 series and calculated according to modern building codes is carried out. Five calculation formulas were obtained for the five possible limiting states of the node. A table with the values ​​of the limiting forces perceived by the connection is presented. A possible variant of improving the assembly is presented, by including a support table in the work.

    Keywords: bearing capacity, metal structures, hinged unit, structural solution, connection of elements, limit state

  • Investigation of institutional obstacles to the development of the knowledge economy

    At the present stage of development, Russia does not have a coherent, well-developed institutional system designed to provide the necessary conditions for the creation of a knowledge-based economy. The article identifies the obstacles that impede the development of a developed institutional system: the counter-innovative orientation of institutions, various institutional traps at the federal, regional and local levels, as well as the emerging institutional void.

    Keywords: knowledge economy, institutions, institutional environment, institutional obstacles, innovative development

  • Staging is based on the strength of the broken plate as an element system of deformers of the deep loosing type surround

    The present cultivators of the soil have a negligible width and depth of loosening is mainly up to 0.6 m. When the number of racks is significantly reduced completeness of loosening, increases the mass of the gun and increase traction resistance. In addition, the possibility of loosening soil to a greater depth is limited. There are rippers with surround deformers. They are inclined relative to each other vertical knife rack, rigidly connected to each other in the lower part with shingles made V-shaped with the apex directed upwards. In this architecture, the system deformers there is a need for analysis to determine the tensile strength in a first approximation: as much as possible to lengthen the elements of the blade without loss of strength and significant changes in their geometric characteristics of the flat cross-section. Reviewed the formulation of the calculation of the strength of the isotropic sloping steel plates of finite dimensions, a polygonal profile with rigidly clamped opposite edges of constant cross section, equal stiffness, as an element of deformers of the chisel type surround. Shows the justification of the selected geometric characteristics of the broken plate. Presents a preliminary finite element modeling using the software - computing complex Structure CAD (SCAD), considering static and dynamic loads. In the formulation of the numerical calculation primarily pursued the goal of establishing the adequacy of a solid model of the stress – strain state of a polygonal sloping steel plates of constant cross section with rigid pinched at the edges. It is established that the threat is a reduction in the actual thickness of the plate more than 1/3 of the project, which leads to failure of the individual piece of details. With little loss of thickness plots of displacements is characteristic reflects a valid value.

    Keywords: The calculation of the strength, deep loosing, system of deformers, stress, strain, bending, a broken plate, clamped edges, geometric characteristics

  • Computer model of heat transfer of moisture transfer in the grain layer under the action of the microwave field and convection

    The action of the microwave field is used for drying, pretreatment and disinfection of grain. In all these processes, it is very important to control the change in the parameters of the grain layer. The use of sensors for direct measurement of temperature and humidity of grain and air is difficult. The microwave field leads to errors in the measurements, and therefore the possibility of an indirect control of these quantities is considered. For the indirect measurement of these quantities, a computer model has been developed. To develop a computer model, a system of equations was used that describes the exchange of heat and moisture in the grain layer under the action of the microwave field and convection. Some equations in the mathematical model are partial differential equations. To develop a computer model, these equations were presented in an operator form. The article shows how this procedure was used to transform the equation showing the relationship between the grain temperature and the microwave field, air temperature and moisture content of the grain. This approach allowed the use of computer software for analysis and syn-thesis of control systems. In this case the Simulink software package was used. Simulink - a model for the exchange of heat and moisture in a thick layer of grain, when exposed to microwave and air, was created using elementary dynamic elements of automation. When developing a computer model, a step-by-step method is implemented. The essence of the method is that the grain layer is divided into elementary layers. The output parameters of one grain layer become input parameters for the next layer. A complete model for the exchange of heat and moisture in a layer of grain consists of models of elementary layers. The results of modeling the change in the temperature of grain heating confirmed the adequacy of the model. The use of this model in the control systems of drying and processing of grain will increase the accuracy of control and regulation.

    Keywords: drying grain, grain layer, grain moisture, grain temperature, drying agent, microwave action, heat and moisture exchange, modeling

  • Advantages of using and developing domestic BIM: the Renga's system for 3D design

    The number of programs for modeling and design of buildings is great and continuous expansion of industry of creation objects cannot be stopped by high technologies. The most part of Russia's origin companies pay attention to foreign products despite great presence of domestic segment on the market. In the article will be considered the domestic software package Renga and also underlined his own advantages over existing analogues.

    Keywords: Renga, Renga Architecture, Renga Structure, BIM, design, modeling, building, program

  • Ceramic brick from clay raw material Sukho-Chaltyrskoe field

    The results of the laboratory studies to determine the suitability of clay raw materials Sukho-Chaltyrskoe field for production of ceramic brick by the method of plastic molding. It is established that the introduction of the composition of the batch burnt mine rocks as emaciated additives and ash as a fuel-containing, as well as in the processing of faces with a special solution, it is possible to obtain ceramic samples that meet the requirements of GOST.

    Keywords: clay raw materials, plastic molding, ceramic brick, emaciated additive, frost resistance

  • The ways of expenses decreasing in use injectable waterproofing for buildings and constructions

    The technology of the new generation is an injection method of polymer waterproofing. As for polymeric compositions for injection are used polyurethane compositions; materials based on epoxy tar; micro cement; acrylate gels. Acrylate gels can provide the necessary reliable, highly elastic barrier from water pressure. Reducing the cost of injection waterproofing is possible through the use of acrylate waste paintwork materials (PWM). The results of studies on the use of acrylate wastes (PWM) as a water-repellent additive to concrete, allow us to recommend identical wastes as materials for volumetric water-repellent treatment of building structures in order to reduce the cost of water resistance by injection.

    Keywords: injectable waterproofing for buildings and constructions, waterproofing materials, paintwork materials, polymer wastes

  • Features of an estimation of efficiency of activity of mobile autorepair workshops at service of motor vehicles

    The peculiarities of the activity of mobile car repair shops are considered. Mathematical models for determining indicators, taking into account the randomness of the receipt of requirements for maintenance and the duration of the services themselves, are proposed.

    Keywords: mobile car repair shop, probability, criteria, complex indicator, efficiency

  • Role models of access and their impact on the performance of web systems on 1C-Bitrix

    This article determines the approach to the implementation of the role model in the implementation of 1C-Bitrix, shows the key approaches to implementation and their impact on productivity, allowing to determine the degree of influence of the role model and choose the most appropriate approach regarding the implementation of 1C-Bitrix. The urgency of research of influence of role model on productivity is grounded. The key factors of the construction of the role model affecting speed and productivity are considered. The criteria for measuring the performance of the role model are presented. The results of measurements of the influence of the role model on productivity in accordance with certain criteria are described. The result of the measurements is the analysis of the influence of the role model and the factors of its construction on the system performance on 1C-Bitrix.

    Keywords: web systems, 1C-Bitrix, system performance, role model, distributed web systems, 1C-Bitrix system, web performance, role model impact, role model performance, role model implementation

  • Analysis and assessment of the safety of hydraulic structures of the Upper Balkar small hydroelectric power station

    The article presents the analysis and safety assessment of hydraulic structures in the upper-Balkar small hydroelectric power plant. This is done for a project for the suspension and preservation of hydraulic structures Verhnebakansky of a small hydropower plant on the river Cherek in Kabardino Balkar-Balkar Republic. A detailed analysis of causes and factors of external impact of natural and man-made disasters on structures. Determined that most dangerous mountain of the construction site are the physical and geological processes. Established that the level of safety of hydraulic structures Verhnebakansky Small hydropower plant at the time of the survey can be assessed as normal. The values of all controlled parameters do not exceed the established safety criteria. Developed and implemented design solutions for the period of the suspension of construction and the stage of preservation provide strength, stability and safety of structures. Object safe for people and the environment.

    Keywords: hydraulic structure, small hydro power plant, free-flow diversion tunnel, a sump, diversion tray, physico-geological processes, risk assessment, hazard ratio, possible crash damage, quantification of risk, negligible risk

  • Features of the development and implementation of energy accounting system

    The article considers the possibility of creating distributed transmission and accounting networks for energy resources. The experience of different countries in creating smart networks was also analyzed and the effectiveness of such systems was evaluated. "Intelligent" systems allow you to distribute energy more efficiently for end users. In addition, "smart" systems allow you to track leaks, accidents, and theft of electricity. The problems associated with the deployment of smart networks are considered. The main features and problems of introduction of accounting systems of housing and communal services in Russia are given. The system of state information system of housing and communal services is considered.

    Keywords: Housing and communal services,distributed network,"Smart" systems, Information system, energy resources