№ 123(9), November, 2016
Public date: 30.11.2016
Archive of journal: Articles count 141, 382 kb
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TECHNICAL AND ECONOMIC ASSESSMENT OF GEARLESS ELECTRIC DRIVES WITH LINEAR INDUCTION MOTORS
DescriptionIn the article we consider questions of use of gearless electric drives with the linear asynchronous engines. Constructions of engines, their features and the principle of action in the electric drives of difficult oscillating motion executed on system the frequency converter – the asynchronous engine, deprived of shortcomings inherent in geared electric drives are described. Recommendations for a choice of an optimal variant of the drive of a working organ of the technological machine which is carried out on the basis of determination of value of the gained technical and economic effect are made. Methods of technical and economic project evaluation are offered: a method of a maximum of economic effect and a method of a minimum of the given expenses, their assessment is given. On the example of the grain-cleaning machine Petkus K531A and the roller-deck machine SGR-400 determination of technical and economic effect is made and an economic assessment of upgrade is given. The conclusion is drawn on validity of use of gearless electric drives from linear asynchronous engines in a technology equipment of agrarian and industrial complex due to lowering of energy capacity of technological processes because of an exception of gears and transformers of a type of movement; in some cases increase in an output of the final product due to increase in efficiency of technological process is watched; implementation of difficult oscillating motion allows to look at execution of a row of technological operations with development of new technological machines in a new way
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MODELLING OF OPTICAL PULSE SIGNALS IN QUANTUM CRYPTOGRAPHY COMMUNICATION SYSTEMS
DescriptionIt is necessary to know exact value of the full dispersion of waveguides, which leads to broadening and reduction of pulse amplitude for modeling laser radiation passage in quantum cryptography systems. The operation purpose was obtaining of dependences on a wavelength of various dispersion types according to the Sellmeier’ sequationand optical pulse radiation modelling in quantum communication systems. Dependences of the material, waveguide and chromatic dispersions on length of a wave according to the Sellmeier’s equation which allows to consider an optical fiber’s material are received. Distribution of a cryptographic impulse through fiber-optical communication lines of various extent is simulated
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COMPARATIVE ANALYSIS OF MODELS OF VENTILATION OF THE SUBSTRATE WITH THE COMPOSTING
DescriptionIn the article we consider the questions of modeling of temperature changes in the composting process, the changes of oxygen concentration and temperature with the air from the environment, produced the effect of composting heat exchange mass with the environment, the selected state variables and the control bioreactor, the dependence of the coefficients of the system equations of motion from the variable state of the object. This article was prepared in the framework of the scientific project 16-48-230441 a(R) "Mathematical modeling of the processes occurring in the automated installation for year-round production of organic fertilizers in the conditions of the Krasnodar region", financed by RFBR and the administration of the Krasnodar region
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MODERN ASSESSMENT OF NUTRITIONAL VALUE OF SORGHUM FORAGE
06.00.00 Agricultural sciences
DescriptionSorghum is a source of concentrated, succulent and coarse forage. Its grain is used for making the mixed fodder and as the concentrated forage for swine, cows, sheep, horses and poultry. Sweet sorghum is successfully used for silage and haylage. Green chop of Sudan grass is used as fresh food for domestic animals and it’s used for making hay and silage. The nutritional value of the fodder is the way to meet the animal needs in nutrients, necessary for living. To determine the nutritional value of the fodder, oat fodder units and energy fodder units or exchange energy are used. At present the assessment of nutritional value according to fodder units is being revised, because it doesn’t give the true picture of the value of fodder nutrition and animal needs in nutrients. The general energetic nutritional value of fodder is considered as contents of all organic substances, supplied with fodder or with its energy. The nutritional value of fodder is valued according to the characteristics of its chemical composition, digestion of nutrients and general (energetic) nutritional value. The purpose of the work is to assess the nutritional value of fodder, obtained from the best sorghum varieties, as the food for different kinds of agricultural animals. Sorghum, used as fodder for poultry possesses the largest nutritional value. Among the grain sorghum varieties, the variety ‘Zernogradskoe 88’ has got the biggest value of fodder units. The green chop of Sudan grass and green fodder for silage of sweet sorghum possess the greatest nutritional value for swine. The varieties of Sudan grass ‘Krasava’ and ‘Arkadiya’ and the variety of sweet sorghum ‘Listvenit’ are the best varieties according to the contents of fodder units
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OPTIMIZATION OF OPERATION AT THE FOUR HARROW
DescriptionDisc tools are designed for the surface treatment of the soil, as well as for loosening and preparing the soil for planting, weed control and grinding residue, for seedbed preparation without preliminary plowing in the system of minimum tillage technology and after thick stem row crops harvesting. It implements a disk type implements include a disc mounted on the individual rack. Classical instruments of this type are made with a rigid stand mounting the cutter body to the frame. In the classical working body attachment scheme has a number of disadvantages. One of them is the lack of a safety element. The proposed version of the working body of the fastening using a spring strut has the following advantages. When zooming in on the disc obstacles (dense soil, bump, pit, stone), flexible disk drives backward, up, down or to the side (left, right) by the spring property (elasticity) of the curved rack. This design reduces the shock load on the bearing assembly, wherein the disc is returned to the original position by passing earth and crop residues without blockage. The purpose of structural changes was to reduce the energy intensity of the surface treatment process of the soil while improving reliability
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01.00.00 Physical-mathematical sciences
DescriptionAn analysis of the experimental data obtained by the authors, as well as reference books, allowed to hypothesize about the essential role of gravitational convection in electromembrane systems with ampholytes even in underlimiting current regimes. The article is devoted to the development of the mathematical model of ion transport in a flow elecrtomembrane system during electrodialysis of ampholyte-containing solutions with taking into account a possible appearance of gravitational convection, in particular, due to nonisothermal protonation–deprotonation reactions of ampholytes. The article presents the boundary value problem that is the new mathematical model for diffusion, convection and electromigration of four components of the solution (ions of sodium, dihydrogen phosphate and hydrogen, as well as molecules of orthophosphoric acid) in a half of an electrodialysis desalination channel, adjacent to an anion-exchange membrane. The membrane is considered as ideally selective and homogeneous. The system of partial differential equations, that is the base of the model, also includes equations of Navier-Stokes, material balance, convective heat conduction and the electroneutrality condition. The system of equations is supplemented by a number of natural and original boundary conditions. A distinctive feature of this study is the absence of assumptions about the equilibrium of chemical reactions in a diffusion layer. The results of the study can be used for the development of environmentally rational and resource saving membrane technologies for a processing of products of agro-industrial complex
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01.00.00 Physical-mathematical sciences
DescriptionThe creation of artificial intelligence systems is one of important and perspective directions of development of modern information technology. Since there are many alternatives of mathematical models of systems of artificial intelligence, there is a need to assess the quality of these models, which requires their comparison. To achieve this goal we require free access to the source data and methodology, which allows to convert these data into a form needed for processing in artificial intelligence. A good choice for these purposes is a database of test problems for systems of artificial intelligence of repository of UCI. In this work we used the database "Iris Data Set" from the bank's original task of artificial intelligence – UCI repository, which solved the problem of formalization of the subject area (development of classification and descriptive dials and graduations and the encoding of the source data, resulting training sample, essentially representing a normalized source data), synthesis and verification statistical and system-cognitive models of the subject area, identify colors with classes, which serve varieties of Iris, as well as studies of the subject area by studying its model. To solve these problems we used the automated system-cognitive analysis (ASC-analysis) and its programmatic Toolkit – intellectual system called "Eidos"
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BIOMONITORING OF CHEMICAL ELEMENTS CONTAMINATION OF RECREATIONAL AREAS OF ROSTOV-ON-DON
DescriptionThe article presents the data on the chemical elements content in soils, plant leaves and lichens of three squares in Rostov-on-Don. The calculation of the total index of soil contamination by chemical elements finds that soils of the square are characterized by a low degree of contamination
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MANY-BODY PROBLEM IN THE METRIC OF CIRCULAR DISTRIBUTED SOURSES
01.00.00 Physical-mathematical sciences
DescriptionIn this article we consider the many-body problem in general relativity in the case of the distribution of N singularities on the circle. It specifies the exact solution of the problem for an arbitrary distribution of singularities. It is shown that the static metric of N singularities corresponds to Newton's theory of N centers of gravity, moving around the central body in a circular orbit in a non-inertial frame of reference, rotating with a period of bodies revolving. We consider the statement of the problem of many bodies distributed at the initial time on the circle. In numerical calculations, we studied the properties of the gravitational potential in the problem of establishing a static condition in which multiple singularities retain the initial position on the circle. This is achieved due to relativistic effects, which have no analogues in Newton's theory of gravitation. Using the properties of relativistic potentials justified transition from the relativistic motion of the particles to the dynamic equations in the classical theory. A system of non-linear parabolic equations describing the evolution of the metric in the Ricci flow proposed. The problem of the calculation of the potentials in the Ricci flow formulated. The application of the theory to describe the ring galaxy, planetary rings and the asteroid belt considered
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SUBSIDIES AS AN INSTRUMENT OF STATE SUPPORT OF SMALL AND MEDIUM BUSINESS
DescriptionSubsidizing part of the costs associated with the implementation of individual activities of small and medium-sized enterprises, it is part of the public financial support to small and medium-sized Russian market structures at the federal and regional levels. Forms and conditions of subsidizing small and medium-sized businesses are largely dependent on the mechanism of formation and distribution of subsidiary assets, operating in a particular region. The article examines the key aspects of the mechanism of subsidizing small and medium-sized businesses in the economic system of the Krasnodar Territory. It presents the entities involved in accepting applications and granting subsidies, describes the main types and characteristics of the conditions for granting subsidies in that region. The study found that most of the subsidies for small and medium-sized businesses provide newly registered firms in the initial stages of their work. The authors conclude that in today's difficult economic conditions, direct subsidies to small and mediumsized businesses should act as the primary measure of government financial support for entrepreneurs. The article proposed measures aimed at improving the existing mechanism of subsidizing small and medium-sized businesses in the region, which include the extension of the list of subsidies, including on different branches, the simplification of documentary about registration of applications for subsidies, the establishment of information and advisory centers for the provision of assistance to entrepreneurs in the design documentation