№ 131(7), September, 2017
Public date: 29.09.2017
Archive of journal: Articles count 124, 307 kb
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MATHEMATICAL AND INSTRUMENTAL SUPPORT OF A POST-GRADUATE EDUCATIONAL PROCESS
DescriptionEducation was always an important part of the development of the individual and society, because education is the process of the formation of mind and character. Each level of education currently requires increased attention, since the quality of life of future graduates directly depends on the quality of the provision of educational services. Despite the fact that most of the educational process is formalized by educational standards, regulatory documents and local acts of educational institutions, this area continues to need both automation and the development of various models, methods and techniques, the use of which will greatly optimize the implementation of the educational process. There are few software products, models and methods that assess the quality of education and the educational process in general, aimed at individual elements of the educational system. In all the existing, basically, there is only support for working with bachelors, slightly less often with masters and very rarely with graduate students. This article describes methodological approaches to assessing the achievements of graduate students, as well as an information system for supporting the educational process of graduate school
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SMALL MAMMALS OF THE TAMAN PENINSULA
DescriptionIn the present study, fauna of small mammals of the Taman Peninsula is analyzed. It is shown that the complex of rodents and insectivores inhabiting the study area differs considerably from the adjacent continental areas and is an isolate. Structure of its fauna and population resembles that of the steppe parts of Crimea and, at the same time, North-West NearCaspian areas. Analyses of variation of the D-loop regions of mtDNA in yellow-bellied mouse Sylvaemus witherbyi, as well as certain peculiarities of the species diversity, show the priority of faunal and genetic connections of the Taman Peninsula’s mammal fauna with the North-West Near-Caspian one
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THE PLACE OF THE STATE ECONOMIC POLICY IN THE MODERN TRANSFORMATION OF NATIONAL ECONOMIC SYSTEMS
DescriptionIn the article, we consider the problem of inclusion of different countries in the world economic system based on the formation of national-oriented strategies of social and economical development, taking into account positive international experience and relying on his own achievements were the focus of attention of participants of the III International scientific-practical conference "National economy in conditions of global and local transformations", held in Armenia and Georgia, 1-8.05, 2017
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A METHOD OF CALCULATING THE COMBINE PARK IN VARIOUS CONDITIONS OF CLEANING
DescriptionThe article discusses the technique of calculating the combine harvester under various harvesting conditions. The authors consider two options for optimizing the fleet of combines: the first, when the harvested area is set, the second, when the harvested area is not specified. In the first case, the harvester park is calculated for a known area with different harvesting times, but within the boundaries of the agro-industry. In the second variant, a park of harvesters is justified and it is calculated how much space it will be able to clean for a different duration of harvesting operations
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CREATION METHODOLOGIES OF CONSUMER VALUE OF CONFECTIONERY
DescriptionIn the article the analysis of an entity of consumer value is provided, approaches to the description of a concept of value are discussed; problems of a research and measurement of consumer value are updated. The consumer value of goods expresses in a choice from a large number of similar goods, conditions for which can be its cost, qualitative characteristics, gradations, the sizes. It is set that in case of determination of consumer value it is impossible to be guided only by its cost, here its qualitative characteristics, conditions of the supplier and the level of service will be an important index for acquisition by wholesalers. The consumer value of production proceeds from the advantages got by the buyer from his acquisition and costs of its purchase made by it. In addition, to understand priorities of the buyer, it is necessary to select analysis stages of consumer value, which are divided into several processes; they include production, a market research, and questions of sale and support of production. Authors consider the value as one-dimensional and multivariate construction, select three basic approaches to value assessment. It is set that pricing based on prime cost is made from analytics of need of the buyer, with establishment of necessity of goods for it, and its cost should characterize its advantages
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Description
Assessment of barley for the blotch incidence is traditionally carried out by visual determination of leaf damage with the help of the available expert – phytopathologist , and with the account scales which allows to characterize a variety for resistance or susceptibility to the studied disease in field conditions. This method has a number of disadvantages that are proposed to be overcome by developing a new tool of a phytopathologist. The measuring tool of a phytopathologist should provide high accuracy of the assessment of plants damage caused by the disease, and the measurement procedure should be quick and easy. The aim of this work is to develop a mobile tool of a phytopathologist for quantitative fast assessment of winter barley leaves damage caused by blotch in field conditions. To achieve this goal the following tasks should be fulfilled. Objective 1: introduce the idea and concept of problem solution; Objective 2: justify the choice of method and solution tool; Objective 3: apply the selected method and tool to solve problems, i.e. to perform the following steps: – cognitive structuring of the subject area; – formalization of the subject area; – synthesis and verification of models; – improvement of the quality of the model and choice of the most reliable model – solving diagnostics problems within the most reliable model (classification, recognition, identification), decision support and research of the simulated subject area by studying its model. Objective 4: describe the effectiveness of the proposed solution. Objective 5: examine the limitations and disadvantages of the proposed solutions of the problem and prospects of its development by overcoming those limitations and disadvantages. The article provides a detailed numerical example of the solution of tasks on real data processed with the ASC- analysis and "Eidos" system
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PERFORMANCE MODELS FOR SMALL PROCESSING COMPANIES OF AGRARIAN AND INDUSTRIAL COMPLEX (part 1)
DescriptionThe article proposes a solution to one of the problems of small business, which is creation of a part of the software of management of information system efficiency for small processing enterprises of AIC. The fact is, that currently, there are almost no information systems to support small business. All known information systems have approximately the same list of automated functions, covering the accounting phase, and sometimes phase of analysis. Practically, not affected by the evaluation function of the economic situation, prediction, planning and regulation. The proposed mathematical model has been developed on the basis of the creation of streaming schemes of one-product processing enterprises of agroindustrial complex and mathematical description of the proceeding financial and material flows
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SIMULATION OF THE LARGE-SCALE TRANSPORT NETWORK BY PREFRACTAL GRAPHS
DescriptionThis work is devoted to a new method for designing large-scale structures of transport networks. The model of a large-scale transport network is built on prefractal graphs. The model of a large-scale transport network is based on the principle of hierarchical organization of territories. A prefractal graph is a finite analogue of a fractal graph combining the properties of a fractal and a graph. Some problems of discrete optimization on prefractal graphs become polynomially solvable under certain conditions. Reducing the complexity of extreme problems on prefractal graphs is due to the fact that on these graphs for some problems, along with the selfsimilarity property, the property of heredity appears. Using this property, it is possible to construct parallel algorithms for problems on prefractal graphs, the complexity of which is orders of magnitude lower than for known successive algorithms
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Description
To reduce the development of additional settlement strip foundations of the existing building on the effect of pressure transmitted to a ground base located near the new slab foundation is considered the work of the geotechnical barrier in various ground conditions. In the first variant of soil, conditions (variant 1) made geotechnical barrier structure in a homogeneous thickness of the weak clay soil. In the second variant of soil conditions (variant 2), a separating barrier is performed in a two-layer base. The upper base layer (carrying) is shown a weak water-saturated clay soil, and the second (underlying) - low compressible soil (sandy loam plastic). According to the results of the calculations and modeling found that, the greatest positive effect on the separating barrier structure (geotechnical barrier) is achieved in the case when the base is a two-layer. The lower part of the geotechnical barrier must be recessed into the soil of low compressibility. Additional settlement strip foundation of the existing building in a uniform basis (variant 1) in the absence of geotechnical barrier is approximately 8 cm. In the case of a two-layer base (variant 2), the additional settlement strip foundation building is reduced by 80-85% (6.6 cm) and will make about 1.4 cm
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SIMULATION OF A STEPPED LIGHTNING LEADER
01.00.00 Physical-mathematical sciences
DescriptionIn this work, a model is developed that describes the formation of a stepped lightning leader in a conducting medium. To describe the contribution of the conductivity currents, we modified the standard electrostatic equation taking into account the vortex component of the electric field. As a result of this generalization, a system of parabolic-type nonlinear equations is formulated that describes the formation of streamers and the lightning channel. Numerical simulation of the propagation of ionization waves in a region with a ratio of 1/100, 1/200 allows us to identify two types of stepped streamers in the form of waves of compression and rarefaction, respectively. It was previously established that there are three streamer branching mechanisms. The first mechanism is related to the instability of the front, which leads to the separation of the head of the streamer into two parts. The second mechanism is associated with the instability of the streamer in the base region, which leads to the branching of the streamer with the formation of a large number of lateral streamers closing the main channel of the streamer to the cathode. In numerical experiments, the third branching mechanism observed in experiments connected with closing the space charge to the anode through the streamer system was observed. These branching mechanisms are also revealed when the leader is propagated. The obtained results, as well as the data of numerical experiments confirm the hypothesis of the universality of the minimal model of the streamer, as well as its expansion in the form proposed by the author. Known phenomena of nature associated with the electrical discharge - streamer, plasmoid, ball lightning and stepped leader can be described within the framework of the minimal model