05.00.00 Technical science
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Description
The tillage with moldboard plows is one of the energy-intensive operations in farming. In view of this, the search of the energy saving solutions and tillage aggregates receives priority. The use of rotary tillage tools based on the working body-mover with elliptic blades, which horizontal soil reaction parts are directed to favoring grade of the aggregate, and, therefore, apart from the performing engineering perform the body-mover functions, - is one of the effective ways of the energy cost reduction. The authors offer the development of the rotary cultivators based on the working body-mover with elliptic blades. The change of their design values allows the development of various profiles tools. The use of these working bodies based on rotary cultivators will allow the energy cost reduction by the tillage process, especially in the compartments of terrain, as the use of tractors with moldboard plows for the main tillage is problematic. In many cases, these lots must be labored manually. The article describes the construction, generalizes the mechanical specifications and working modes of the rotary cultivator at the main tillage
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ANALYSIS OF QUALITY INDICATORS OF AUTOMATIC CONTROL SYSTEMS WITH NONLINEAR APPROXIMATION CONTROL LAW
DescriptionThe subject of research of this work was the study of the quality of control processes in a nonlinear automatic control system with an approximating the control law. In the known published works there are no results of such studies, which makes it difficult to synthesis a nonlinear control system for multimode objects in applied biotechnology, including technological objects of the agro-industrial complex. A comparative analysis of the quality of regulation in the transient and steady-state regimes is carried out. It is shown that the approximation method used for the synthesis of the nonlinear control law provides a linear dependencies in steady-state and close to them modes in combination with relay modes in transient regimes, which is a positive factor for improving the quality of regulation in multimode control systems. It does not necessary to determine the moments of switching the dependencies in the control law when changing modes
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Description
We have experimentally studied fluctuations of power of an electric arc in different types of plasmatrons with different power supplies in the article. Influence of fluctuations of power of the plasmatron on technology parameters of a plasma stream (current, voltage, an enthalpy, temperature, speed of a plasma flow) and on process of forming of coatings at impulse plasma was experimentally shown that the nature of fluctuations depends from fluctuations of voltage of the power supply, plasmatron type and also from fluctuations of an electrical arc. The size of fluctuations of power can be 50-100%. It is experimentally shown that impulses of power of an electric arc are capable to complicate supply of sprayed powder in to the plasmatron. Such fluctuations do not make dispersion of the melted powder particles. In the work, we have drawn conclusions that large-scale pulsations are capable to worsen quality characteristics of plasma coatings significantly
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Description
The article presents a computer program, which define automobile transport demand for the transport service of harvesters in the grain harvesting process. The program has a simple and intuitive user interface, a flexible setting system. It allows to change the source data for needs everything agricultural companies. It doesn’t require an installation and it can function in everything operation systems, which is fitted for Microsoft office applications acting. It doesn’t require a special studying or deep knowing in a mathematical statistic for using. Everyone specialist can use the program in an agricultural enterprise. The program considers distribution laws of stochastic parts of the grain harvesting process. These process features are important to consider due to using of determination values give very rough results. If there are mistakes in the structure design of the harvesting-transport complex then there are nonproductive machines downtimes or the harvest losing. Using the program gives better organization of the transport service in the grain harvesting process, and it can give the economical effect. It is especially important in modern competitive conditions at the worldwide market of agricultural products and also at the interior market with consideration of external economical sanctions and with consideration of the declared import replacement course. The successful work of agricultural enterprises defines the country's food security and it turns down the oil dependency of the Russian economy
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Description
Our research aims at providing new effective control methods for scientific and technical expertise to organizations and foundations that fund research projects on a competitive basis. These methods should provide analytical decision support for group decision making in a distributed environment. In this work, we consider an integral model for knowledge representation – a socio-semantic knowledge network that combines social links and a semantic description of knowledge into a mathematically formalized graph theoretic structure. In terms of actor-network theory, we consider a multimodal network with actors on one of the levels and artefacts (i.e. contexts that express network links) on the other level. In order to represent knowledge domain based on a graph and hypergraph paradigm and fuzzy sets theory, we provide a sufficiently complete set of elements and relations (either trustworthy or partially trustworthy) both between multitype elements and their heterogeneous groups. The formal representation allows applying the model to solve numerous practical tasks such as expert finding, formation of expert groups, expertise refinement, reduction of subjectivity, analysis of an expertise process, analysis of processes within expert groups. Research methodology: social network analysis (SNA), theory of graphs and hypergraphs, fuzzy calculus and fuzzy logic
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FINDING FUNCTIONS OF ENERGY AND ACCUMULATION WIND PERIODS FOR THE SPECIFIED SPEED
DescriptionThe article describes a method for obtaining the functions of energy and accumulation wind periods, using the program Microsoft Office Excel. We have showed the algorithm of the programs that had been developed to reduce the processing time for large quantities of data. Obtained functions are recommended for determining the optimal parameters of autonomous windpower stations with accumulated reserve
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SEMANTIC SEARCH ENGINE BASED ON ONTOLOGY MAPPING
DescriptionWe live in a world of rapidly developing information technologies, where many organizations are related to each other, forming complex information networks. Therefore, storage, analysis and retrieval of information is a very complex and urgent task. In connection with the advent of search engines and communications, millions of people are engaged in the search and retrieval of information. Commercial search engines, such as Google, use keyword search based on logical queries. The main disadvantage of this search is that it returns a lot of irrelevant information, which leads to low accuracy. In this article, we focus on building a semantic search system based on the mapping of the ontological model. This includes various stages of development of ontology, the phase of indexing and information retrieval
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THE METHOD OF ENGINEERING CALCULATION OF DRIVE DEVICES FOR FORAGES PREPARATION
DescriptionThe article presents results of the study of devices for preparation of feed based on the relative helical drums. In addition, we have created a method of calculation of the drive, including motor power. We have given a calculation sheet for relative helical drums of types of 5.1 and 3.1, as well as typical schemes of devices for preparation of feed (feed-making machines) composed of hollow equilateral triangular of hollow tetrahedrons pyramids and hollow octahedra. The created method of calculation of the drive was tested in the calculation of power consumption of feed-making machines based on spiral reels of 5.1 type mounted using hollow tetrahedrons and spiral reels of 3.1 type, assembled from hollow octahedra. It is shown that in the calculation of the actuator, we should not only take into account the mass loading of feed components, the relative weight of the screw drum assembled with wheels, for a symmetrical load location, but also a lot of download components of feeds, arranged in a spiral relative the drum asymmetrically to the axis of rotation. Thus, summing up the power of the electric motor, required for relative rotation of the screw drum symmetrically loaded and also under asymmetric load we define the motor power for the device for preparation of feed, or feed-making machine
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Description
This article cites the data about the amount and productive capacity of oil producing enterprises in the Russian Federation on the whole, as well as in Krasnodar region and the Republic of Adygeya. It is shown, that innovations in the field of waste disposal and waste recycling left after oil production are the most effective, as they contribute to the cost reduction on disposal of waste on landfill and thus, improve environment considerably. They also provide additional revenue from the sale of new products, received after waste recycling. The authors examined literature data on compositional and chemical analysis of waste left after cleaning main oil-bearing crops, processed by oil-producing industry of the Russian Federation (such as sunflower, rape, soy-beans) . The analysis of available technologies of their disposal, such as waste incineration, pyrolysis, worm composting, landfilling, biothermal composting, granulationa of waste and the processing of undersow is submitted to your attention. The analysis of advantages and disadvantages of all available technologies was carried out, and it was noticed that neither of available technologies had become common use. The most prospective direction for the development of efficient technology of waste recycling has been chosen, which includes the use of waste pressing after their rational preparation and isolation of uniform and valuable components. It is shown, that the primary task for the development of such technology is the study of waste composition of raw materials and industrial cleaning of sunflower seeds, soy-beans, and modern sorts of rape and its hybrids
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THEORETICAL STUDIES OF A MILKING DEVICE WITH AN OVERHEAD MILK REMOVAL FROM THE COLLECTOR
DescriptionThe aim of the research was the theoretical justification of the main design-technological parameters of the experimental milking apparatus with an overhead milk removal from the collector. The milking machine comprises teat cups, collector, pulsator, milk hose, and vacuum. The manifold is formed with an upper withdrawal of milk by means of a vertically mounted suction tube. The upper end of which is located in the output region of the milk tube, and the bottom – in the bottom of the milk camera collector. The article presents the results of theoretical studies on the analytical substantiation of structural and technical parameters of the milking machine. It presents graphic dependences characterizing the convergence of results of theoretical and experimental studies of the milking machine