05.00.00 Technical science
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POWER SOURCES OF OPERATION, CONTROL AND PROTECTION DEVICES
DescriptionCurrently operating in autonomous systems of power supply DC voltages power sources are secondary sources for operation devices, protection and control of generators, motors, stabilizers and inverters have relatively low operational performance. The work proposes to improve the weight and the size of power supplies to apply a high frequency link in their designs. We provide structural designs and the peculiarities of operation of secondary power sources with a high frequency link. This article discusses the fundamental electrical circuits of pulse regulators, converters based on resonant inverters and transformers with rotating magnetic field. The use of resonant inverters in power sources will significantly improve their weight and overall dimensions. In addition, the use of secondary sources of supply for transformers with rotating magnetic field will simplify their design and reduce the level of electromagnetic interference generated by semiconductor devices. The features of operation of pulsed regulators and prospective structuralschematics converters discussed in the article, performed on resonant inverters and transformers with rotating magnetic field, will increase the effectiveness of pre-work on the development of secondary power sources with improved operational and technical characteristics for devices of operating, control and protection
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COMBINATORIAL DIAGNOSIS MODEL OF A POWER OBJECT
DescriptionThe present level of development of power systems, the need to increase their resources and increased competition have caused especially true problem of increasing the efficiency of their operation. The work is devoted to the justification of the selection and development of a technique of construction of the diagnostic model to search for failures in power objects
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THE IMPLEMENTATION OF THE CONCEPT OF "ELECTRONIC GOVERNMENT" IN HIGHER EDUCATION
DescriptionIn the article, based on the generalization of long-term operation of archives of Kuban state University, we present current regulations and practice of work with archival documents, pressing questions of transition to paperless acquisition, storage and use of documentary resources of the organization. The author conducted a detailed analysis of the functioning of the archives of the University taking into account the specifics of the focus of the organization, defined the main tasks of the archive. The role of the archive is considered in the context of source of historical and cultural heritage of society. We highlighted problems of control and storage of archival documents, due to the steady growth of documentary information. Due to the rapid development of electronic document management today, the approach to the management of archival documents is formed based on electronic technologies. Based on the analysis and the identified problems, the article presented constructive proposals for the introduction of an electronic document archive organization if the interaction with the EDMS and other systems. To speed up the process of working with paper media, we might use the technology of digitization. It is obvious that now, without implementation of modern information technologies it is impossible to organize effective accounting, storage and use of archival documents
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Description
In this article, on the basis of phenomenological consideration of kinetic processes in semiconductors volume, we have conducted an analysis, in order to estimate the drift and diffusion components of the output current for hot carriers in the total output of the conductivity structure of the chip. The result revealed amplitude and frequency characteristics of this component of the conductivity, illustrating a greater amount of its modulus and phase inversion near the field-strength values of Ghan effect. This can be used for designing oscillators of millimeter range of wavelengths. It is shown that the nonlinear diffusion component along with the drift is important for the output conductance of the test specimen
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ALGORITHM FOR OBTAINING MATHEMATICAL MODELS OF ELECTROMECHANICAL DEVICES
DescriptionAn algorithm for obtaining a complex of mathematical models of electromechanical devices, which can then be formalized and implemented in software, is proposed and described. Until recently, the implementation of this algorithm was possible only with the manual derivation of all expressions, which significantly hampered the work of researchers. The appearance of such programs as Maple, Mathematica and MathCAD provided the possibility to automate the process of obtaining analytical calculations that allows calculating any modes of any types of electromechanical devices, reduces the likelihood of errors and allows you to change accepted assumptions and designations in the developed models. The choice of the MathCAD program (in comparison with Maple and Mathmatica) can be justified by the fact that MathCAD has the most convenient interface, allowing not only to perform mathematical calculations, but also to present the results in ordinary mathematical notation. The analytical results obtained in MathCAD can be immediately included in numerical models
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ORGANIZATION OF TESTING IN THE AUTOMATED MONITORING SYSTEM CALLED «CONTROL»
DescriptionThe article is devoted to the use of complex computer programs called "Automated verification and final practice on determination of level of professional readiness of police officers to perform their tasks" - ASC "CONTROL" developed with the Delphe programming language. It describes the basic techniques of the automated testing with the use of the complex algorithms training testing database to use, as well as methods of reporting for testing. We describe how to work with the software modules of "Control" and "Analysis". The first is designed to create and edit a test database and processing of results of testing of the subjects. It is only used by the originator of the test and inspection and is not available for testing. The second module is available to everyone because it provides testing. It is implemented as a separate computer and local network. The number of test, at the same time is virtually unlimited. We clearly articulate the features of the use of the software complex, algorithms of creation of new test tasks, describe the setting options of the test database in detail, technology editing sections of the test, definition of assessment criteria, and describe the technologies of testing subjects. The Complex of computer programs of ASC "CONTROL" has passed the technical testing and successfully used in educational process of chair of computer technologies and systems of Kuban state agrarian University and the determination of the level of knowledge of cadets and police officers in Krasnodar University of MIA of Russia. In this regard, this work will be useful to drafters of test databases in this software environment
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EXPERIENCE OF SCREW ROTORS DEVELOPMENT AND DEPLOYMENT
DescriptionThe article offers a method of details finishing and cleanup processing based on the details and working environment granules mass hashing in combination with the target transporting movement from loading to unloading. Such combination is provided by means of technological process in which the movements are carried out at the expense of the working body executed in the form of a complex screw rotor with the multidirectional screw surfaces formed by flat elements. Four screw rotors designs and methods of their assembly as well as the recommendation on the use of screw rotors are shown: "The movement of the processed details and particles of a working environment is the most complex and infinitely various among the I class screw rotors and the most elementary and uniform among the IV class screw rotors". The practice and experimental control of the details finishing technological process introduction efficiency in screw rotors have shown that for the considered case productivity of, for example, agnail removal increases tens of times. It is reached not only at the expense of the possibility of continuous processing provision in screw rotors, but also due to significant increase in amplitudes of low-frequency fluctuations which are reported to loading masses by the screw rotors machines located at different angles to each other and to screw rotor rotation axis
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COMBINED SYSTEMS OF ELECTRICITY SUPPLY BASED ON RENEWABLE ENERGY SOURCES
DescriptionCurrently, there are widely used combined (hybrid) power systems in the world, made using renewable and conventional sources of energy. The article discusses a typical structural scheme of a combined system of electricity supply; it also shows the design and the characteristics of three types of structural circuit design of combined power systems and their main advantages and disadvantages. Peculiarities of the choice and calculation of parameters of the basic functional elements of the combined system have been presented. This study describes main characteristics of solar batteries and provides analytical expressions for the calculation of their main parameters. The main characteristics of batteries and the peculiarities of calculation of the capacity of storage batteries operating in autonomous systems have been listed. The features of selection of voltage inverters have shown that in addition to the nominal input and output voltage it is necessary to consider other characteristics that influence the work of autonomous power supply systems. It has been shown when it is desirable to use electromechanical generators to supply autonomous consumers. The types of structural solutions and the choice of the basic functional elements of combined power systems will increase the efficiency of their design
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Description
Based on the analysis of modern scientific approaches to the construction of complex information-measuring systems, we have formulated a circuit solutions model of a distributed system of control of parameters of soil, the implementation of which will allow to build systems in small businesses
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ESTIMATION OF CONSUMER PROPERTIES OF DELICACY FROM RABBIT MEAT
DescriptionOne of perspective variants of development of the meat industry can become the production of foodstuffs from untraditional kinds of the meat raw materials such as the rabbit meat, which has a high protein content with a full number of essential amino acids, broad spectra of the mineral substances and vitamins and reduced fat content. Therefore, a demand on the rabbit meat has been increased significantly in the past years. Rabbit meat is widely used in various culinary dishes of the dietary nutrition. Rabbit meat is used in limited scales for production of sausages. The production of the delicacy sterling foodstuffs from the rabbit meat, that are capable for long-term storage, is almost not developed. The regulated requirements for quality of rolls that are included in Technical Conditions are set up in accordance with the developed recipe and technology of production of the smoked-boiled rolls from the rabbit meat. All the foodstuff samples gained high scores on the organoleptic estimation. The foodstuffs satisfy the requirements for chemical composition: mass fraction of protein – no less than 20%, mass fraction of fat – no more than 25%, mass fraction of moisture – no more than 65%. The developed delicacy foodstuffs have a high nutritional and biological value