05.00.00 Technical science
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Description
Today, the Russian agriculture is facing food market saturation task by domestic quality products in sufficient quantities for the needs of the population. At the same time healthy nutriment is provided, according to doctors and scientists, by vegetables, which must be present in the diet of a healthy person. In this regard, a big role is assigned to the covered ground crop production, normal functioning of which allows to supply shops and markets with vegetables throughout the year. For the formation of the necessary environment inside the greenhouse promoting normal plants growth, the main role is played by the solar radiation penetrating into the greenhouse through the transparent enclosure and creating necessary light and temperature and humidity regime. Comparison and analysis of the main cover and light-transmitting materials (film, glass, polycarbonate) characteristics revealed polycarbonate to be the basic material today, light transmitting characteristics study of which this article deals with. As a research method, molecular optical spectroscopy was applied. In order to study there has been selected waveband with their length value from the 610 to 700 nm, which spans exactly the shortwave part of the solar radiation spectrum, which is necessary for the proper implementation of the plants photosynthesis in artificial rearing conditions. After analyzing the measurements results it can be said that studied "KARBOGLASS AGRO" polycarbonate samples, despite the substantially greater thickness in comparison with for example plastic film that is widely used in the old fashioned way, are characterized by higher value of light-transmitting ability for light wavelength values passing through the material - respectively of 79-80,4% and 75,4-77%. Light transmission of "KARBOGLASS AGRO" cellular polycarbonate is at 5 ± 1% higher than of other traditional materials. Among the studied coating materials for covered ground facilities and due to the research results of their light-transmitting capacity, today cellular polycarbonate is of undoubted advantage
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DEVELOPING AN EXPERT INFORMATION SYSTEM FOR SOCIAL PROTECTION
DescriptionThe article presents a study of types of expert systems (ES) and methods of their construction. We have developed principles of functioning and the architecture of dynamic ES for social protection that can modify its behavior depending on the changes in the subject area and in specified scripts of functioning
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Description
Car license plates recognition problem is one of the typical tasks of computer vision. Video surveillance software usually provides license plates recognition function. Meanwhile, there are many approaches to solve this problem, where template-based methods are the most common. Such methods providing predictable and short enough execution time, and little percent of mistakes. However, such methods are far less effective in case there is a need to recognize car’s license plate, which may be located in unpredictable place, typed in undefined font and on non-standard background, or without strict formatting. For example, USA car license plates. One of the methods to increase effectiveness and quality of such license plates recognition is to use neural networks. It is assumed, that neural networks usage can significantly increase recognition quality. Nevertheless, neural networks usage entails difficulties of it’s training, and often becomes less efficient as template-based methods usage. This article discusses probability of usage of convolutional neural network, which was trained using MNIST (Mixed National Institute of Standards and Technology) database. This article is a review of usage of templates and neural networks for car’s license plate recognition in terms of quality, performance and complexity of the usage
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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
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Description
It is estimated that (85-95%) of the electric motor failures occur due to damage to the stator winding. In this case, more than 90% of damage are because of interturn short circuits. Short circuits in stator windings of stand-alone asynchronous generator change the base magnetic flux incidentally, so the probability of its long work with such kind of damage is great. A latent failure, existing as a loop closure, significantly reduces the reliability of the generator as a backup power source. Now sensitive protections of asynchronous generators do not exist, since it is believed that in the case of short circuits (short circuit), the generator loses its excitation, and protection is not required for it. Identification of information signs of short-circuit currents in the stator winding of an asynchronous generator makes it possible to develop relay protection. The main principle of detection of stokes closures in the stator winding of an asynchronous electric motor is the measurement of the emerging asymmetry of the stator currents. It has been established that in the case of short-circuit faults, the asymmetry of the currents and voltages is not large and comparable to the asymmetry in the AAG load circuit. This does not allow performing a protection that reacts to this asymmetry. You can also say about changing the harmonic spectrum of currents and voltages. To build protection, it is necessary to use highly sensitive circuits for detecting the asymmetry of a three-phase system of currents and voltages, as well as distortion of the shape of currents and voltages, for example, by harmonic analysis. Do not exclude the possibility of using other protection devices, such as reacting the vibration of the case of an induction generator in the event of damage to the stator winding
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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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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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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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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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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