№ 129(5), May, 2017
Public date: 31.05.2017
Archive of journal: Articles count 97, 240 kb
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PHENOMENOLOGICAL APPROACH TO THE DESCRIPTION OF TRANSPORT PROCESSES IN LOOSIBILE MATERIALS
DescriptionA mathematical description of the potentials of mass-transfer of hygroscopic materials is possible on the basis of analytical expressions describing sorption and desorption isotherms. Because of the complex nature of the interaction of colloidal capillary-porous materials with moisture, determined by the action other than sorption forces (physical sorption, absorption, chemisorption), capillary condensation forces and osmotic forces, which for different materials are specific and quantitatively different, to date There is no single universal dependence for the analytical description of isotherms of sorption and desorption. Accordingly, there is a wide variety of analytical expressions for the description of isotherms of sorption and desorption. There are many different methods of analytical description of the sorption properties of colloidal capillary-porous materials. All known methods can be divided into two groups: the first should include analytical expressions derived theoretically on the basis of various hypotheses and assumptions, while the second - purely empirical based on the expansion or change in the forms of models of the first group. A large number of equations of equilibrium isotherms are mathematically equivalent. Thus, the method of determining the transport potential based on position allows us to take as a basis for calculation the experimental data on the hygroscopic properties of certain materials and to use the phenomenological approach for the engineering calculation of complex technical devices
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RESTORATION OF A MODEL OF A DYNAMIC NONLINEAR SYSTEM FROM THE TIME SERIES GENERATED BY IT
DescriptionThe main task in the analysis of time series is the reconstruction of the dynamical system that generated this series. To illustrate the nature of the behavior of a dynamic system described by a nonstationary time series, a «phase portrait» method is proposed. An acceptable description of the phase space of a dynamical system can be obtained if we take instead of real variables of the system delay vectors composed of the values of the series at consecutive moments of time. Restoration in a given class of a system of differential or difference equations is performed based on the scalar time series of the observed process. In order to eliminate the measurement error and accurately represent the position of the object in the current, future, or any of the past moments, it is proposed to apply the Kalman filter using the known mathematical model of object dynamics
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EXCHANGE RATE MANAGEMENT SYSTEM AS A METHOD OF STIMULATION OF THE EURASIAN INTEGRATION
DescriptionThe article describes a system for managing the dynamics of national currencies exchange rates of the countries of the Eurasian Economic Union (EEU) in relation to the collective currency. The purpose of this method is achievement of equilibrium values of exchange rates and improvement of the state of trade balances of the countries of the EEU. The authors conclude that the application of the proposed system will lead to an increase in the interdependence of the dynamics of the exchange rates of the countries of the EEU. This will ensure preparation for further deepening of the intra-union integration
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CONTENT OF ELEMENTS OF FEED IN PLANTS OF WINTER WHEAT AT REMINERALIZATION OF BLACK LEACHED SOIL
06.00.00 Agricultural sciences
DescriptionThe article shows the ninth year of research on the remineralization of leached chernozem. In the plants of winter wheat, the content of macro and micronutrients of nutrition under remineralization of leached chernozem was investigated. It is established that when introducing rocks, the content of food elements in plants rises
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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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ANALYSIS OF THE CAPABILITY OF CURRENT ASSETS IN THE AGRARIAN AND BAKERY SPHERES OF THE ECONOMY
DescriptionIn the article we consider the methodological framework for the analysis of asset turnover; critical assessment of individual provisions of the traditional methods of analysis of capital turnover; a method to eliminate the influence of the price factor and the composition of current assets by results of approbation of an improved method for analyzing the turnover of circulating assets and own capital of business entities. The basis of the theory of capital turnover is the classic formula of the reproduction of capital by K.Marx, suggesting the increase of goods, money and money capital at the last stage of treatment, and improving the efficiency of the rational organization of the use, the rational level of concentration. The higher the speed of capital turnover, the more efficient its use is. The peculiarity of the process of the turnover of inventories, working capital is its dependence on specialization of business entities, defining the structure of fixed and current assets, ratio of reserves, participating and not participating in circulation during the reporting year. However, the traditional method of analysis of asset turnover, inventory does not distinguish between reserves for participating and non-participating in circulation during the reporting year, which precludes an accurate assessment of the process of circulation of assets to make the best management decision for their formation, to determine an objective rating of the business entity in its credit scoring. With regard to the method of analysis of asset turnover, inventory use of non-participating stocks in circulation during the reporting year, overstates the average annual total assets, inventory is the baseline for calculating the number of revolutions; inflated the average book value of assets, inventory, reduces the number of revolutions per year overstates the duration of one rotation of assets, stock, increases the capacity revenue (annual turnover) and, therefore, overestimates the need for assets, inventories, leading to inaccurate assessment of the release (raising) of assets stocks
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THE BASICS OF CALCULATING THE PROBABILITY OF FAILURE-FREE OPERATION OF SUPPLY BUSES AND BUS SECTIONS
DescriptionIn agriculture, the high reliability of electricity supply is necessary because of its main feature production is associated with biological objects. The change in the state parameters can lead to a sharp decrease in the productivity of the biological system or, in general, to the death of it. The following enterprises are particularly critical to the reliability of power supply: dairy farms, hothouse complexes, incubators, grain storage sites, finished products and much more. The article presents: models of failure of switchable busbar, models of failure of supply buses; formulas for the calculation of reliability indicators, the calculated values of the probabilities of failure-free operation of individual elements, analysis of the values obtained, conclusions were made on the models presented and suggestions were made for introduction into production, energy conservation was associated with reliability of electrical installations
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THE EFFECT OF DRIP IRRIGATION ON SOIL PHYSICAL AND CHEMICAL PROPERTY CHANGE
06.00.00 Agricultural sciences
DescriptionSoil profiles were made in intensive apple orchard in the agricultural enterprises in Lipetsk and Tambov regions in 2015. Drip irrigation in year rates of 500-550 m3 was carried out since 2010. During the research we determined the soil density, the solid phase density, aggregate composition, particle size distribution, the content of hydrolyzable nitrogen and humus by conventional methods. As a result of drip irrigation can increase dust-like fraction in dark gray forest soil, whereas in chernozems this index did not change significantly. In the black earth soil was noted the process of increasing the proportion of mud fraction due to mineral part chernozem destruction. In both soil types was increased sand content. It was found that drip irrigation improves some of the soil water-physical properties, such as a soil structure coefficient and the content of agronomical valuable aggregates in a layer of 20-40 cm. There was also noted that with increasing soil depth was reduced humus and hydrolyzable nitrogen content. In aggregate analysis, it was found that dark-gray forest soil the amount of water-stable aggregates increased, while meadow chernozem leached soil decreased. Data of the aggregate analysis revealed that in the dark-gray forest soil the amount of water-stable aggregates increased as a result of drip irrigation, while in meadow chernozem leached soil decreased. It recommends by drip irrigation application permanent monitoring of the soil humus content
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Description
The article reveals the peculiarities of the use by the subjects of special knowledge (inquirer, investigator, inquiry body) of their powers in determining the amount of property damage caused by the crime. The authors compare the possibilities of criminal and procedural actions in assessing this type of damage.
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Description
The article deals with the application of the theory of regulation for the synthesis of technological mechanical devices and their replacement by electrical or electronic analogs in order to reduce energy processes in soil cultivating and sowing machines