№ 74(10), December, 2011
Public date: 30.12.2011
Archive of journal: Articles count 76, 142 kb
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SIMULATION OF CONTROL SYSTEM WITH THROTTLE CONTROL IN THE FUSE OF FORESTRY MACHINERY
DescriptionThe system of control of fused forest machines with throttle, which change their cross-section as a function of effort, occurring at the front of the working body and the mathematical model for edge throttling element is presented. The description of the device and design elements of a fuse is given
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04.00.00 Geological-mineralogical sciences
04.00.00 Geological-mineralogical sciences
DescriptionThis article discusses results of hydrogeological study including morphometric terrain analysis of irrigation systems of Syrt Plain. The author of this article tries to prove that irrigation of chestnut soil in Syrt Plain can be achieved without employing regular drainage systems by citing the example of long-term irrigation system employed by experimental station in the town of Ershov
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THE FILTRATION PROPERTIES FEATURES OF TECHNOGENIC DEPOSITS
04.00.00 Geological-mineralogical sciences
DescriptionThe studies of synthetic sand deposits formed after working dredges deposits in river valleys, have established significant heterogeneity of filtration properties of elementary layers of sand of different grain size distribution. The features of the structure of the array of man-made structures provide a large capacity of absorption of suspended clay particles and the conditions for water purification by adsorption
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COMPARATIVE ASSESSMENT OF FUNGICIDES OF NEW GENERATIONS TOXIC TO DAPHNIA
DescriptionWe have assessed the effect of the new generations of fungicides on the vital activity of daphnia. The data of the chronic experiment allowed us to determine non-effective and threshold concentrations of the substances studied. The toxic effect of the xenobiotics is shown to be of different intensity. When entering water they may be dangerous, first of all, for the zooplankton that is the food base of young fish, and may have unfavorable effects on fish development
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01.00.00 Physical-mathematical sciences
01.00.00 Physical-mathematical sciences
DescriptionForecasting method of flow discharge on the reach of the mountain-flat river channel based on water balance equation and stochastic forecasting model of flood situation in a hydrometric section line of river canal is described. The results of test calculations executed for a reaches of the river Kuban are presented
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ANALYSIS OF METHODS OF GENERATION OF TIME SERIES WITH LONG-TERM CORRELATION STRUCTURE
01.00.00 Physical-mathematical sciences
DescriptionThis article gives a comparative analysis of six modeling techniques of fractal differential noise, including: direct definition method, the method of Hosking, the method of Davis and Hart's, the circulant embedding method, Paxson method and method of spectral simulation. Furthermore, the algorithms are given for the analysis and the method of estimation of Hurst`s parameter is selected, this method is the main criterion of quality when comparing the above mentioned methods of fractal differential noise