№ 114(10), December, 2015
Public date: 30.12.2015
Archive of journal: Articles count 111, 292 kb
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06.00.00 Agricultural sciences
MODELING REGIONAL SYSTEMS OF BREEDING PIGS
06.00.00 Agricultural sciences
DescriptionThe article contains the experience of the development of the methodology and the computer program for calculation of regional and local systems of pigs hybridization at the example of the Rostov region (Russia). Crossing the GP lines for F1 should be organized in multiplier farm, which may be separate farms and to be part of large commercial farms. For the production of F1 in a multiplier farm, we must breed a purebred specialized paternal and a maternal line, selected on the effect of combining ability. For the successful functioning of the system of hybridization, it is necessary to build a genetic pyramid, including breeding and genetic centers (nucleus farm), multiplier farm, reproducing the baseline. The article gives a detailed calculation of sow population of levels of P, GP, GGP for maternal and paternal breeds of pigs. The program uses user-defined parameters of pigs productivity, of the simulated population, and the parameters characterizing the intensity of selection of young animals. To ensure annual production of 1,822 million pigs in the Rostov region it is necessary to provide the availability of brood stock in the amount of 89 thousand heads, 6 800 heads in the structure of grandparent flocks (GP), 730 heads in the structure of the Grand-Grand-parent stock (GGP), excluding sows second maternal and paternal breeds
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CROSSABILITY OF CRIMEAN INDIGENOUS GRAPE VARIETIES WITH FORMS OF VARIOUS ORIGIN
06.00.00 Agricultural sciences
DescriptionProgress of breeding for resistance to diseases, pests and low temperatures is provided by cross-species hybridization. Institute of Vine and Wine "Magarach" is one of the leading centers of selection of grapes in the world. The breeding program of deducing grapes at the institute is based on the study and attracting the world's gene pool, including and industrial of the Russian Federation assortment of grapes. Analysis assortment shows that the share of productive, highquality varieties with group resistance to diseases, pests and extreme environmental factors is very small. The main method of selection of grapes of a new generation who have genetically determined traits earliness, resistance to biotic and abiotic factors is crossing complex interspecific hybrids and forms of their involvement with each other and with the forms of species Vitis vinifera, belonging to different ecogeographical groups, saturating crossing between hybrid forms with complex features, the appropriate selection of reference. For vigorous offspring is most effective as a parent to use a local variety of forms of Crohn and father - interspecific cultivar Alminsky
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06.00.00 Agricultural sciences
DescriptionThe value of the initial material for selection for heterosis is primarily defined by the combining ability in respect to the main economically valuable characteristics. Combining ability with respect to “grain productivity” has been studied among fourteen selfpollinated lines of maize of early ripening and three testers in the system of hybrid combinations. We have proved that weather conditions have an influence on the variability of the estimates of the combining ability. We have identified the new self-pollinated lines of maize SP 165 and SP 175, which are characterized by invariably high evaluations in the effects of GCA (gi) in different years. The new self-pollinated line SP 167 has got high variants of SCA (δ2si). The new lines SP 161, SP 163, SP 167 and SP 174 have been characterized by the variability of the evaluations in the effects of GCA. They are related to the first or second rank in respect of GCA, depending on the year of the conducted evaluation. These are SP 163, SP 164, SP 170, SP 171 and SP 173 that have differed by their variability of the variants of SCA (from the low variants to the high ones). The highly productive testcross hybrids: Madonna M × SP 165 (4.88 t / ha), Madonna M × SP 171 (4.85 t / ha), Madonna M × SP 167 (4.80 t / ha), T 7M × SP 165 (4.78 t / ha) have been obtained based on the self-pollinated lines having invariably high figures of GCA and SCA
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PRODUCTIVITY OF WINTER BARLEY IN LEACHED CHERNOZEM CONDITIONS OF KUBAN
06.00.00 Agricultural sciences
DescriptionThe article discusses the various technologies of cultivation of winter barley at two ways of main tillage (recommended and zero-level) with different backgrounds of soil fertility, fertilization rates, protection from weeds, pests and diseases. Consistent improvement of soil fertility and other fertilizers resulted in an increase in crop productivity. Nutrition is the basis of life of a living organism, including plants. The value of crop yield and its chemical composition depend on the conditions of nutrition. It is achieved with the optimum combination of light, heat, air, water, food, etc. In this connection, in the development of methods of cultivation of this crop, we may not only increase the yield of grain, but also pay due attention to the quality of cultivated products. Thus, studies in the experiment showed that the intensification of cultivation technology of one phenomenon substantially and significantly affects the productivity of the given culture
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NOISE-IMMUNITY OF PSEUDO-NOISE SEQUENCE ACQUISITION ALGORITHM FOR MC-CDMA COMMUNICATION SYSTEMS
DescriptionThe goal of the study is to research a noise-immunity of pseudo-noise sequence acquisition method for multicarrier communication systems MC-CDMA, using a segment of the pseudo-noise sequence. The goal was achieved by running a simulation developed in MATLAB. By analyzing the results, we can show that the developed mathematical model produces the lower bound for pseudo-noise sequence acquisition probability. The resulting analytical estimations might be used during the design phrase for pseudo-noise sequence acquisition systems for MC-CDMA based military communication networks
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Description
The current state of the industry and high level of development of technologies dictates the requirements to various electromechanical converters of energy and electric drives. Constantly there are new requirements to these types of devices and their characteristics that lead to creation of more and more difficult devices of the electric drive and control systems which example is cascade systems of electric drives. This type of drives solves part of problems of the modern industry. However, creation of such devices requires development of new approaches to design and creation of cascade systems of the electric drive and its components where one of the most complex challenges is determination of parameters of electromagnetic system. In the article, a new approach is given, in finding electromagnetic parameters of components of the operated cascade asynchronous electric drive, proceeding from the applied types of the electric windings distributed in space. This approach is realized at creation of the program complex, which is part of system of automatic design
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DEVELOPMENT OF AN EXPERT SYSTEM FOR DIAGNOSIS MALFUNCTIONS OF ENGINES OF DIESEL POWER STATIONS
DescriptionThe article considers development of expert system based on semantic networks for diagnosis malfunctions of the diesel power stations engines. The method allows developing expert systems via objectoriented programming language. The expert system allows to identify the problem without involving additional staff: at the start and overheats of the engine, when there is low power, with decreasing pressure etc
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THE ISSUE OF A FUZZY EXPERT SYSTEM DEVELOPMENT
DescriptionThe article considers questions of the information system of choice of development tools of automated systems based on fuzzy logic model. The technique allows us to develop information systems in an objectoriented programming language. Information system allows selecting the most effective tool without additional researches
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Description
To increase the productivity of the cattle it is demanded simultaneous distribution of all types of animal feed in the form of balanced feed mixture with a given nutritional value. Balanced feeding of animals can improve their productivity, reduce feed wastage, and include alternative components of feed mixtures in their diets, which have nourishing properties and high digestibility; make and adjust feeding rations. Researches conducted by Russian and foreign scientists, proved the prospects of full feeding of complete feed mixtures, which allow to increase the productivity of animals to 9-30 % and reduce the feed consumption in the calculation of 1 с of milk by 7-8 %. The composition of complete feed mixtures includes sunflower cake, silage, root crops and forage. The process of preparation and distribution of feeds for large horned livestock is the issue of all the necessary components of the feed mixture with a given nutritional value. Saturation of the feed product with extra energy goes during its interaction with the working bodies of technical means for preparation and distribution (TMPD) of different types of food. For preparation and distribution of components of the feed mixture it is necessary to have following facilities, provided with reducing energy intensity and improving the qualitative indicators of processes: for grinding beet fodder and sunflower cake we need disk shredders; for shredding silage and roughage – bearnie and rotor shredders, respectively; for dispensing of beet fodder and sunflower cake – belt conveyor, for dispensing silage and roughage we use disc and drum dispensers, respectively; for mixing sunflower cake - rotary mixers, and for silage, beet fodder and for-age we may use paddle mixers; for distribution of sunflower cake we use rotary feeders, for silage and beet fodder – bin distributors, and for coarse feed we should use conveyor dispensers
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CONTROL OF MEDIUM MOVEMENTS OF ULTRA PRECISE DC ELECTRIC DRIVE WITH ELASTIC SHAFTING
DescriptionControl of the movement and positioning are the most intensive tasks of automatic control and regulation. However, these problems must be solved in the automation objects such as assembly and production lines, manufacturing machines, conveyors, hoisting machines, packaging machines, filling lines for liquids, metal-working machines. One problem lies in the fact that all the real drives are connected to the actuators with not perfectly tough shafting, but has some elasticity. This leads to the difficulty of motion of the executive body of the drive automatic control systems which consists of signal source generating signal due optimum speed diagrams for medium movements of electric drive’s actuating device and automatic regulation system, which allows to work out optimum speed diagrams for medium movements of electric drive’s actuating device with ultra-precision. In this article were developed optimum speed diagram for medium movements of ultra-precise electric drive with elastic shafting. Were identified all parameters of diagrams and its range of existence. Also developed device for generating the optimum speed diagram for medium movements of ultra-precise electric drive with elastic shafting. Implementation of the proposed hardware software complex will significantly improve the accuracy of motion actuators of various ultra- precise DC drives