№ 107(3), March, 2015
Public date: 31.03.2015
Archive of journal: Articles count 114, 263 kb
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REQUIREMENTS AND CONSTRUCTIVE DIFFERENCES OF A STATIC CONVERTER
DescriptionIn this article technical requirements to static converters are examined. We can treat as the basic parameters: efficiency and quality of a target voltage. Weight-dimensional parameters, reliability, maintainability are basic operational parameters, as well as target capacity, size of an starting and target voltage belong to key parameters of static converters. As a rule designing of converters is a uniform constructive complex. As at designing, time of an operating time until first failure is taken into account, time of guaranteed work of the separate elements included in the static converter, are determined on the statistical data. Failure of separate elements of parts of converters are possible because of internal (time of guaranteed work) and external (short circuits, overloads) factors. In the article we have offered the ways of reduction of influence of external factors (for example, we used high-speed automatic switches or iterative static converters in which parts of a power circuit were included in parallel). Using universal static converters allows raising some parameters of efficiency simultaneously. In the article we have also considered a scheme of the iterative converter with variable structure which allows (depending on start and target conditions or requirements) forming an output capacity of the required level and quality without constructive change
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A CLASSICAL PROBLEM FOR LOADED HYPERBOLIC-PARABOLIC EQUATION OF SECOND ORDER
01.00.00 Physical-mathematical sciences
DescriptionThe investigated and correct boundary value problem for mixed hyperbolic-parabolic equation of second order in a bounded domain is posed and studied in this work. Boundary conditions are of a classical nature. On line of type changes, which is also the line of the parabolic degeneracy for hyperbolic equations considered in the lower half-plane, a continuous bonding condition for the function itself and the breaking condition for the trace of the derivative is given. The main result is the proof of its unique solvability in the required class of functions. In particular, based on the properties of the operators of fractional integro-differentiation and in view of the ratio of the first boundary value problem for the heat equation, the question of the solvability of the original problem was equivalently reduced to the problem of solvability of the corresponding integral equation of the Voltaire second kind. In the hyperbolic part of the region, the question of solvability of the problem has also been reduced to the problem of solvability of the integral equation Voltaire second kind. The properties of the hypergeometric function of Gauss, as well as classical methods of integral equations were used. Thus it is proved the uniqueness and the existence of classical solution to the initial problem
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ECONOMIC EFFICIENCY OF USE OF GROUND RESOURCES IN AGRICULTURAL COMPANIES OF THE KRASNODAR REGION
DescriptionLand resources are the basis of agricultural production, the issue of increasing the efficiency of their use is always relevant. The purpose of this article is to estimate the economic use of land resources in the agricultural organizations of the Krasnodar region. Cost-effectiveness analysis was carried out in two stages: an initial set of agricultural organizations with the help of cluster analysis is divided into homogeneous groups; for each cluster we have constructed a production function, which reflects the relationship between the value of the gross output of the agricultural land area, the average annual number of employees, the average annual value of fixed and current assets. The analysis has allowed identifying homogeneous groups of five agricultural companies. The analysis of the production function has shown that the companies of the first cluster of agricultural land use lands with maximum efficiency, the gross output value of 1 hectare of agricultural land was 70,1 thousand rubles, and the degree of influence of agricultural land on the value of gross output reaches its maximum value and is 83%. Agricultural organizations included in clusters of three and five, have a minimum efficiency of agricultural lands use – 20,3 and 21,2 thousand rubles respectively. Based on the analysis, we have made recommendations that improve the efficiency of land: to use the best varieties that are resistant to a range of diseases and pests in the production; to observe the optimum time of harvesting, cultivation and protection of plants; to use smart energy and resource saving technologies, as well as soil conservation technologies; to improve and maintain soil fertility
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THE PROBLEMS OF IMPLEMENTATION OF MATHEMATICAL AND TOOL METHODS OF CONTROLLING
01.00.00 Physical-mathematical sciences
DescriptionStatistical methods are based on the developed theory and demonstrated its usefulness in the sectors of the economy. However, the analysis of the situation in the application of statistical methods shows obvious distress, in which accumulated in our country's scientific potential is not used to the full. As practice shows, it is not enough to develop promising modern theory-based effective mathematical and instrumental methods of controlling. For using such methods in mass, it is necessary that they would be implemented. Management of innovations, i.e. innovation management, quite rightly is currently one of the most debated sections of the economy and the organization of production, of the entire economic science in general. However, the implementation of applied statistics and other statistical methods, more generally, mathematical and instrumental methods of controlling, has its own specifics. It is considered in the article. We have highlighted the developmental vulnerabilities - low scientific level of many individuals applying statistical methods, the lack of organizational structure of applied statistics as a field of applied activities and others. We regret to note that the very idea of the need to establish requirements for the methods of data analysis and project formulations such requirements remained outside the attention of those professionals who need them and were addressed. We have no adequate system of guidance for documents on concrete statistical methods performed on modern scientific level. According to the author, the desired future of applied statistics is reorganization according to the model of Metrology. We have analyzed the application of statistical methods as a specialty. The analysis of state standards on statistical methods and the causes of them blunders are given. We have discussed the status of documents for statistical methods for standardization and quality control. We discuss a new system of "Six Sigma" for implementation advanced mathematical and instrumental methods of controlling
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INCREASING OF THE DEGREE OF BEE COLONIES DEVELOPMENT BY THE APPLICATION OF ELECTRICAL TECHNOLOGIES
DescriptionThe equation describing the whole combination of actions with bees in hives during spring development is obtained. The formula for coefficient of degree of bee colony development during exact period is obtained. The whole combination of electrical technological actions let to increase the bee colony spring development by two times. The counting of the bee keeping labor profitability for the case of application of electrical technologies during winter and spring is carried out. Application of electrical technologies increases the profitability of honey production by two times. The competitiveness of honey bee products could be increased by the way of application of the meanings of efficient electrical technologies targeted onto increasing of honey productivity of bees, increasing of eco-purity of sanitary actions and decreasing of labor content of main technological actions. Using these calculations, you can create an automated climate control system in the hive. To do this, you must also take control laws and apply the appropriate sensors, microcontrollers and executive bodies. All of this will go to the next - higher level of profitability of beekeeping that rose-sieves produced pro-competitive products. To automate the most labor-intensive processes of beekeeping. These processes are pumping honey and labor costs beekeepers to carry out veterinary and sanitary measures
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RESEARCH OF ENRICHED SECONDARY MILK FERMENTATION WITH COMPLEX PROBIOTIC CULTURES
DescriptionThe article presents the results of enriched secondary milk fermentation by complex probiotic cultures
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BIOCHEMISTRY OF SOME PERSPECTIVE TABLE GRAPES
06.00.00 Agricultural sciences
DescriptionThe article contains results of the study of biochemistry of some perspective table grape varieties: Aniuta, Vodograi, Nizina and Jubilee Novocherkasska, yield in 2013 from the Central zone of Krasnodar region. At the time of redy yield the combination of sweetness and acidity of fruits were favorable. The ratio of fructose to glucose was 1.69; 1.36; 2.00; 1.13, respectively, in grapes Aniuta, Vodograi, Nisina, Jubilee Novocherkasska. According to the percentage of fructose in fruit juice varieties Aniuta, Vodograi and Jubilee Novocherkasska close to each other (50.93; 56.14; 51.23%). According to the percentage of glucose similar varieties Aniuta and Nizina (33 - 34.27%), Vodograi and Jubilee Novocherkasska (41.16 - 45.22%). Sort Jubilee Novocherkasska, had content in berries close fructose and glucose. Most of fructose (66.02%) in berries variety Nizina. In berries studied cultivars organic acid content was: wine 3128 - 3861, malic 982 - 3753, citric 109 - 317, amber 3 - 115 mg / dm3. The highest concentrations of potassium and sodium cations are presented in berries varieties Aniuta: potassium - 1219 sodium - 35.13 mg / dm3 and cations magnesium and calcium in berries Jubilee Novocherkasska 46.75 and 73.64 mg / dm3. The lowest concentration of potassium and sodium cations observed in grape Vodograi, magnesium - from grape Aniuta, calcium - at grape Nizina. We studied grape bunches are large, not dense, beautiful, berries are large, harmonious taste. Tasting score fresh grapes varieties Aniuta, Vodograi, Nizina, Jubilee Novocherkasska 7.6; 7.4; 7.8; 7.8 points respectively
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TAX ACCOUNTING: THE MAIN DIRECTIONS OF DEVELOPMENT
DescriptionThe article presents an analysis of domestic tax accounting under modern conditions. The authors substantiate the presence of accounting principles in the tax accounting system, which is also confirmed by the presented views of scientists about their close relationship. The article provides objective reasons for the separation of accounting and tax accounting. By monitoring the regulatory framework of studied accounting systems it has been proved that the separation occurred inconsistently, as a result of tax accounting system is not provided at the appropriate level theory that creates a big problem in practice. The authors have identified and summarized the negative consequences of the existence of tax accounting and direction of its development. The study of scientific literature has shown that the domestic debate about tax accounting and its relationship with accounting continues to this day. The study allowed conditionally designate two directions of development of the Russian concept of interconnection systems of accounting and tax accounting. The first direction involves the creation of an autonomous system of tax accounting. The second direction involves the transfer, with the possible modification of elements of the accounting system in the tax accounting system. The authors justified the conclusion that the only independent accounting and tax accounting contributes to the achievement of their purposes
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ECONOMETRIC TOOLS OF CONTROLLING
01.00.00 Physical-mathematical sciences
DescriptionEconometrics is one of the most effective mathematical tools of controlling. The article deals with general problems of application of econometric methods in solving problems of controlling. Econometric methods - is primarily a statistical analysis of concrete economic data, of course, with the help of computers. In our country, they are still relatively little known, even though we have the most powerful scientific school in the foundations of econometrics - the probability theory. The article shows that to decide the problems of controlling is necessary to apply econometric methods. Classification of econometric tools can be carried out on various grounds: on methods, by type of data, in tasks, etc. Mass introduction of software products, including modern econometric analysis tools of concrete economic data can be regarded as one of the most effective ways to accelerate scientific and technological progress. The whole arsenal currently used econometric and statistical techniques (methods) can be divided into three streams: high econometric (statistical) technology; classical econometric (statistical) technology, low (inadequate, obsolete) econometric (statistical) technology. The main problem of modern econometrics is to ensure that the concrete econometric and statistical studies used only the first two types of technology. To get a broader representation of the use of econometric methods in the management of production organization we analyze basic textbook "Organization and planning of engineering production (production management)," prepared by the Department of "Economics and organization of production" of the Bauman Moscow State Technical University. It has more than 20 times using econometric methods and models that testify to the effectiveness of such a tool of manager as econometrics
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BUILDING A MODEL OF INFORMATION SYSTEM FOR SMALL BUSINESS BASED ON ONTOLOGY
DescriptionSemantic technologies provide existence of a certain abstraction layer over available information to technologies which allows realizing communication of data, semantics and processes executed in distributed environment. Development of these technologies will allow creating the unified representation of SWS in a wide range of applications, to find precisely necessary information, to simplify intra firm integration and integration of network applications in distributed environment. The article defines the semantic specification SWS, the tools for creating ontological Web services (SWS) and Web services (WS) at the conceptual level, defined requirements and assets of services composition. The architecture of SWS of applications, assets for deployment and execution of SWS by coordination of a flow of operations, network agents is described. It also considers the role of agents in creation and implementation service - the oriented applications, and also distinction between services and agents. Furthermore, the system architecture of integration of SWS with use of a multiagentny flow of operations is shown in article. It inspects the interaction between service and process agents with web services and distributed resources. In the article we have highlighted the advantages of the standard workflow management, portability and interoperability, strict formalization of the process description workflow and versatility. Based on the process of service composition using agent-based approach we have presented the future model of adaptive service composition based on the interaction of agents considered and architecture of multi-agent coordination. Step through the process of presenting service using agent-oriented approach was emphasized. On the basis of the process of service composition using agent-based approach we have presented the structure of the future model of adaptive service composition. Process of representation of service with use the agent-oriented approach is noted step by step. Based on the interaction of the agents we have considered a multiagent coordination architecture