№ 124(10), December, 2016
Public date: 30.12.2016
Archive of journal: Articles count 99, 268 kb
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TO THE QUESTION OF THE MAIN PERFORMANCE CRITERIA CALCULATION FOR ELECTRIC POWER STATIC CONVERTERS
DescriptionWidespread in autonomous systems, including uninterrupted power supply systems, there are power static (electronic) convertors: rectifiers and inverters, used to match the parameters of the electric power source and the load; they also have a function of voltage stabilizers. Important question is the calculation of key performance criteria at the design stage: power losses, efficiency, reliability, weight and size (for electrical transport systems). The article discusses the methodology of the simplified calculation of the basic criteria of efficiency of inverters and rectifiers. There are schematic electrical diagrams of power rectifiers and inverters, and the basic analytical expression for a simplified calculation of the basic criteria of efficiency of the converters, including their output filters. Each year, we improve the technical characteristics of the probes using new element base, allowing reducing the level of electromagnetic interference generated by power electronic devices. We have also shown perspective directions of the development of power converter technology by using one-phase and threephase transformers with rotating magnetic field in their creation (therefore we increase reliability of operation and efficiency). A promising direction is the construction of converters and autonomous systems in a modular complex, where (in addition to increased system reliability) we simplify its operation, including service
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CLASSIFICATION AND BASIC METHODS OF CONSTRUCTING SOLAR POWER PLANTS
DescriptionThe high speed of solar energy development in the modern world allows us to assert that in the near future it will become one of the main sources of electricity. The authors describe a classification of solar power plants, which can be of two types – thermodynamic and photovoltaic, as well as the features of design and operation of these plants. There is a structural and schematic solution of autonomous solar power stations and ones operating in parallel with the external power grid. The features of their design and operation, including the main advantages and disadvantages were shown. It is shown that to improve the reliability, including uninterrupted power supply, a promising direction is the development of combined systems which in addition to the solar power plant may use wind power, gas or diesel power, etc. In addition, such stations may provide power from the external power supply. We have given one of the variants of structural designs of combined systems of energy and disclosed recommendations for the design of energy-efficient combined systems of power supply, made using renewable and conventional sources of electricity. The final version of the combined system of electricity supply and the degree of participation of traditional and renewable energy sources in electricity production is determined on the basis of the analysis of the energy balance and electromagnetic compatibility of the main functional elements of the system
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CLINICAL AND MORPHOLOGICAL FACTORS AND PREDICTION PARAMETERS OF CELL CYCLE IN ESOPHAGEAL CANCER
DescriptionThe aim of the study is to compare the traditional clinicopathologic factors and prognosis of cell cycle parameters, such as ploidy, cell cycle kinetics, as well as the study of DNA content in the tumor tissue of patients with esophageal cancer. Cancer of the esophagus - a very aggressive malignant disease, most commonly manifested impaired swallowing. As a rule, this type of cancer pathology is characterized by unfavorable outcome. Ploidy and cell proliferation activity, defined by the content of the DNA of the tumor - synthesizing cells are one of the important indicators of the growth rate of malignancy and prognosis. The study was performed on tumor tissue fragments of the 30 patients operated on for cancer of the esophagus. DNA study - conducted in the open cell material aftercare. DNA cell content was determined by flow cytometry BD FACSCanto II. By studying the DNA-cytometric parameters, we found the prevalence of aneuploid tumors in 66.7%. It was shown that DNAcytometric parameters are independent of gender. Major weight of diploid and aneuploid cell tumors of the esophagus was in G0 / 1 phase of the cell cycle. Comparative analysis of DNA - cytometric parameters and the degree of differentiation of esophageal tumor revealed a prevalence of aneuploid tumors in all the test cases. content distribution pattern of tumor cells was found in the G0 / G1-, G2 + M -, S - phase of the cell cycle at different stages of the disease
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CORRUPTION AS A STATE SECURITY THREAT
DescriptionThe article deals with the historical causes and conditions of corruption in Russia and some foreign countries. The concept of corruption in terms of the current legislation is briefly studied with the aim of proposing legislative initiatives in future to expand the definition of concepts: corrupt behavior; corruption; corruption offense and a crime. The work outlines the key features of act of corruption, its devastating impact on the sovereignty and security of the state. Particular attention is paid to the spiritual and moral component of occurrence of corrupt behavior in society, as well as its impact on social, political and economic development of the state. The study determines the destructive force of corruption as a factor of destabilization of the economic and political life of the society and the country, as well as the impact of this effect on the international credibility and external security of the state. In the article on the example of the political events taking place in the countries of near and far abroad, it is stated that corruption is the main cause of internal and external wars. The article identifies proposals for the improvement of the current anticorruption laws of the Russian Federation, taking into account the basic principles of the rule of law, in order to prevent internal and external destabilization in the country, as well as to strengthen security and the international prestige of the state
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01.00.00 Physical-mathematical sciences
DescriptionThe article presents a mathematical model of the ion transport across phase boundary exchange membrane / solution. The border is considered as an object in space, endowed with all the physical and chemical properties that are inherent physical and chemical phases. It is regarded as a special physical and chemical environment, having a distributed exchange capacity in which there is space charge dissociation of water molecules. The size of this object is estimated in the range of 1-300 nm. The surface morphology of industrial membrane type MK-40, МA-41 and МA-41P was investigated experimentally by scanning electron microscopy (REM). There was analyzed the amplitude of average surface roughness. In this article, the reaction layer is modeled as a region that forms as a relief morphology of the membrane. Membrane properties are due to the properties of the solution and the properties of the membrane. To determine the dependence of Q(x) is proposed procedure for assessing the proportion of solid phase in the total volume of which can be seen in the vertical cross section microprofile on the membrane surface line. Height multivendors determine the reaction layer zone on frame of model. Influence of surface morphology on the V-A characteristics and the sizes of the convective instability of cation-exchange membrane evaluated numerically simulating the hydrodynamic flow conditions using a solution of the Navier-Stokes equations. The transfer of a strong electrolyte such as NaCl ions through the thin layer of the reaction layer is considered. The place of nanomodel in the structure of a three-layer membrane system is showed. The distribution of the concentration of ions in the system, the charge density distribution and the dependence of the integrate charge with extent nanolayer is present. How to change the shape of the space charge and its integral value with one is investigated
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INVENTORY AS A SIGNIFICANT ENTITY OF ACCOUNTING AND ANALYSIS
DescriptionThis article considers the value of inventories for accounting and analysis. The purpose of the analysis of material resources is to increase efficiency of production through rational use of resources. Its inventory can optimize and improve the organization as a whole
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METHOD OF POLYMORPHIC VIRUSES DETECTION BASED ON ARTIFICIAL IMMUNE SYSTEM AND GENETIC ALGORITHMS
DescriptionThis article is dedicated to the study of the fundamental properties and components of the immune system such as B lymphocytes, the Tlymphocytes, immune system storage, primary and secondary immune response, immunological training detectors, which will be the basis of the obtained as a result of detection methods of polymorphic viruses using artificial immune systems. Polymorphism of computer viruses is the formation of a malicious program code directly during execution. Thus, it is impossible to create a unique signature corresponding to these polymorphic viruses. A similar classification problem is solved by the immune system of vertebrates, stared again met with the virus, it "remembers" him, and the next time provides effective secondary immune response. These properties of the immune system served as a prerequisite for the use of immune approaches and algorithms for solving the problems of detection of malicious code. The article identified and described their main features, proposed the idea of their implementation and software, system interactions in the immune system revealed such important features, the implementation of which will be effective in solving the problem of detection of malicious code and software. Also, for a more productive system of education is considered a class of genetic, evolutionary algorithms, described by their immediate implementation of site-specific decentralized artificial immune system, built a system of interaction of genetic and immunological algorithms.
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METHOD OF IMPROVING AGRICULTURAL BUSINESS ACTIVITIES
DescriptionThe aim of this study is to develop a set of theoretical and methodological tools of the provisions on the formation of economic analysis and assessment of the level of risk management in agricultural business structures to support their choice of management techniques
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Description
The article is devoted to the evaluation means of formation of professional competence, provided by traditional and innovative methods of control. The main differences between competence, knowledge and skills are examined. It expands one of the major challenges of high school, which consists in bridging the gap between "Knowledge" paradigm of teaching content and professionally meaningful results. We describe the changes that have occurred after the transfer of knowledge and skills approach to competence, manifested in the shift from learning content to the results of the training activity. Also the differences between the Federal state educational standards of different generations are considered in detail. The article deals with the system-activity approach as the basis of Federal state educational standard of higher education and its effectiveness in the implementation of the goals established by the standard. Also the main components of the educational process which have their own characteristics in the system-activity approach are discussed in detail. It is about teaching methods that can be applied within the framework of the components described for the formation of various professional competences. Particular attention is paid to control, description of various innovative control methods that help evaluate the level of professional competence development. The analysis described training methods and control methods which allowed revealing which methods of control are able to assess the level of professional competence. The analysis described training methods and control methods, which revealed what methods of control are able to assess the level of professional competence development
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Description
A methodology for a multilevel system approach to integrated optimization of processes of harvest, transportation and cleaning of the grain during the harvest by the method of «Neveyka» has been developed. The main method of research - is a queuing theory of all components of the yield except straw. The System consists of 6 interconnected subsystems with their inputs and outputs, and its own optimality criteria. On the first level of optimization, the most efficient way of wheat harvest «Neveyka» has been proved. On the second level - the total duration of the harvest with allowance for 4-5 cultivated wheat sorts, each of which is harvested within 5 calendar days, was optimized. The third level proves the requirement of combine harvesters and transport vehicle. On the fourth level - the combinations of harvesting and transport units are optimized on the criterion of the minimum amount of the loss on the mutual expectations of harvesters and vehicles. The fifth optimization level proves the capacity of the reception station of the grain storage, where the main criterion for optimality is the least amount of losses on the mutual waiting time of the transportation vehicles, and the additional criterion is the minimum waiting time of vehicles in the queue. On the sixth and the final stage the specific annual economic effect (rub/ha or rub/t) from the implementation of the proposed technology is determined. It is established, that during the grain harvesting, transporting and processing of heap there are elementary or Poisson probability flows of requirements for service. The Representation of harvesting - transport link in the form of closed queuing system of independent harvesting unit. An approach to the justification of failure-free operation of a station for cleaning grain heap and storage of grain and chaff is presented