05.00.00 Technical science
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Description
The article contains an analytical overview of the causes of local washouts on hydraulic installations of Don highway networks. One of the major outlet structures of the main canal is the terminal resets in Sadkovskaya gully (Veselovsky reservoir 1115+79), with a maximum flow rate of 50 m3/sec, designed for irrigation and desalination of Veselovsky reservoir. To analyze the effect of the liquid on the bottom of the outlet structures we need to know the kinematic parameters of the liquid in the channel. Until now there are no universal correlations, which would allow calculating these parameters. The mathematical dependences allow analyzing the impact of water flow on the bottom of the spillway constructions of melioration canals. Modeling of local scour of channels is based on a thorough analysis of the causes of this phenomenon. The main ones are the kinematic parameters of the liquid, the speed and the propagation direction of fluid flow, structural features of the channel. The mathematical dependences allowed us to identify the following parameters that influence the degree of local scour at end spillway structures on melioration channels: the rate of flow, the degree of compression of the stream size, flow, shape, and movement of sediment, depth and shape of the supports in the plan and cross section, the shape of the hydrograph, the angle of the jet, duration of standing high water levels in Sadkovskaya balka, etc
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Description
The article deals with the results of research of acoustic and magnetic field influence on conductivity and pH value of hydroponic solution. For carrying out researches in this area the hypothesis of possibility of nutrient solution influence on ions by means of an acoustic and magnetic field is set up. A laboratory scale plant was constructed for a pilot study of the hypothesis. The solution was moved in the tube passing through a ferrite ring with winding. Thus, the solution was exposed to the influence of acoustic and magnetic field. The object of research was hydroponic solution of (NH4)2SO4; (NH4)2HPO4; K2SO4; Ca(NO3)2; MgSO4 in water having adjusted concentration and acidity. The solution was taken from the tank of laboratory scale plant by means of the pump, passed through the working area of the acoustic and magnetic device, filter, and then was poured into the tank, from which the sample for pH level changing was taken. The pH value was measured at the temperature of 22С by using electronic pH-meter KL-009(1)A. For control of instrument readings acidity was tested by universal test-paper. The initial pH value of solution made 5. As a result of acoustic and magnetic treatment of solution pH value of hydroponic solution increased from 6 to 6.9. The results show the possibility of pH value correction by small energy input
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Description
This article is devoted to solving the critical task of improving the reliability of the power systems for agricultural processing plants. The article’s material is exploratory in nature, reflected in the fact that the proposed mathematical models for the analysis of groups of high-voltage induction motors will allow to investigate various modes of symmetric groups of asynchronous motors more effectively. We present the analysis of the existing mathematical models of induction motors considering the design features of such machines that directly affect the dependence of resistance and inductance on the rotor current frequency. The assumptions taken into consideration to obtain a more accurate mathematical model of the induction motor are also formulated. The article provides a comparison of different reference frames used in the mathematical modeling of asynchronous motors. It is proved that the use of the generalized coordinate vector for mathematical modeling of asynchronous motors is the most optimal approach. The equivalent circuit of asynchronous deep-bar motor in generalized vector coordinates derived in the work is used for analysis of transient behavior as well as the steady state operation. The results of the study are suitable for transient analysis of electrical power supply systems of agricultural enterprises with large number of high-power electric motors, for example, CHP of sugar processing plants and grain elevators
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Description
The article presents a study of parameters and modes of operation of machines for soil cultivation. In determining the parameters and modes of operation of machinery for tillage we have applied the theory of similarity and dimensions of physical quantities. We have obtained the regularities of disclosing the relationship of the parameters from the medium to the energy characteristics of the process. As the initial data we used test protocols of machines for soil cultivation (Central - Black Earth, Kubanskaya, Sibirskaya, of North - Caucasion MIS, RosNIITiM) : KPI - 3.8, AРC - 3.9, AKV - 4, AKM - 6 - V, AMP - 4 APC - 4 A, AРC - 10 APR - 4.4, APU - 6.5 APSH - 6 , CNC - 6.0, CSТ - 3.8, APC - 4. We defined the formula оf dimension parameters and modes of operation of machines for soil cultivation and properties of soil (traction resistance, depth, width, speed, hardness of the soil, acceleration). Based on dimension theory we have received similarity criteria. Based on the correlation analysis and the least squares method we determined the nature of addiction and the coefficients for it. We have also received a graph for determining the operating modes and parameters of machines for soil cultivation
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Description
In the region, there is a problem of effective management of the pharmaceutical benefits under the benefit programs and the implementation of the therapeutic process. In health care in prescription health products of preferential category of citizens we have more than five different software developers involved that doesn’t allow controlling the prescription at all levels of health administration of the region. In order to form information flows into a single space it is necessary to have an integrated software product involved, both in the prescription, and in their service. The article presents a review of existing systems for issuing and servicing of preferential recipes, and prescriptions for controlled medicines, in the context of healthcare of the Krasnodar region, including considered the variety of products offered by different developers. The concept of integration of existing systems, which will allow overcoming the difficulties associated with fragmented solutions in automation preferential drug provision. For information exchange we encourage to use the XML format, examples of requests and responses in SOAP
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Description
PE2NT11 and chopped carbon fibers and PE2NT11 and modified carbon fibers composites were investigated. It was shown that the mechanical properties depend on the surface characteristics of fibers. It was found that laboratory and tube samples have some difference in mechanical properties that connected with specific distribution of fibers in samples
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MICROSTRUCTURE OF MODEL SYSTEMS BASED ON FERMENTED RAW MATERIALS
DescriptionIn the research we have given a detailed description of certain structural components of the model system when adding fermented raw material into it. As the raw material we used collagen containing by-products of bovine animals of the 2nd category – lips and ears were used. The lactulose syrup and linseed flour were used as growth-promoting substances. The fermentation of the raw material was conducted by freeze-dried starter of the bacteria of Propionic Culture PS–4 and Probio–Tec ВВ–12, and also bacterial concentrate Bifilact-Pro. The fermentation parameters: the temperature 37°С, the time of the fermentation is 3 hours. The changes, taking place in the tissues under the biotechnological processing, were established with the method of the histological samples test. As the result of the conducted microstructure tests of prototypes it was determined that in the biomodification process under the influence of the propionic and bifidus bacteria marked changes occurred in the histological structure of modeling systems in the comparison with the control sample. At the same time it was ascertained that under the influence of the ferment processing a loosening of collagen fascicles happens to isolated fibrils and their fragmentation occurs. As the result, when composing protein compositions an emulsion (which is homogeneous by the structure) comes out. In the future it is recommended to use the emulsion in the receipts of boiled sausages and minced half-finished goods
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Description
The research is devoted to the problem of choosing the best methods for assessing the economic efficiency of information technologies. Using the Kemeny median is proposed to solve this problem. This method will allow to obtain the ranking of methods of evaluating of IT effectiveness by various criteria. The existing methods of valuation of economic efficiency of information technology were systematized in the article. Preliminarily, all the methods were divided into three groups: financial, probabilistic and qualitative analysis tools. The advantages and disadvantages of methods, their purpose, use and limitations were also considered. As a result of systematization, it was concluded that there were some limited and one-sided methods. No single method allows to assess comprehensively the effectiveness of an information technology. Obviously, the methods should be considered in the system. But for this they need to be ranked. In order to obtain the ranking the method of Kemeny median was used. In the beginning the expert evaluation of methods by the eight proposed criteria (taking into account the specificity of the original data, validity, unambiguity, information content, exactness, complexity, the access to information, the cost) was carried out. Next, the search of the group ranking was carried. The matrix of losses was compiled. The problem of appointments was solved in MS Excel. At the end, the matrix of paired comparisons has been obtained. This matrix helped to determine the final ranking of alternative methods. Therefore, using the Kemeny median allowed us to prioritize the use of methods of evaluating of the effectiveness of information technology
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INDUSTRIAL DEVICE FOR THE ELECTROCHEMICAL ACTIVATION OF WATER
DescriptionWe describe a stationary industrial plant for electrochemical activation (ECA) of the water created on the creamery of "Yuzhni Polyus" in Kropotkin. It includes 4 diaphragm reactor - electrolyzer of a dielectric material volume of 200 liters each, control cabinet, power electrical equipment, water supply system, containers for activated water, pumping equipment for its transport and ventilation system. The anode and cathode chambers are separated by ion permeable diaphragm reactors of cotton filter cloth. The reactors operate pairwise in succession, one pair in the production mode, the other - in the mode of preparation. The anode is made of titanium sheet; the cathode is made of stainless steel 12HN9T. In the selection of the electrode material we used mass-spectrometric investigation of the chemical element composition of water before and after electrochemical activation. The device produces alkaline catholyte 15.84 m3 / day (pH 10,4 ÷ 11,71) and acid anolyte 3.36 m3 / day (pH 2,24 ÷ 3,1). Using the created device (power consumption –11,4 kW ∙ h / t) meets the basic requirements of production – resource conservation, environmental safety, high performance and ease of use. These circuit diagram and photos of the installation allows reproducing it in other enterprises, contributing to the wider application of electrochemically activated water
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MODERN METHODS OF SCIENTIFIC JOURNALS IMPACT EVALUATION
DescriptionThe purpose of the research is the development of new methods of the estimation of the importance of scientific journals. It is known that for assessing the significance of scientific journals it is used a universally recognized impact factor, which reflects the average number of citations to the articles published in the magazine for a certain period of time. For a more objective assessment of the significance of the journal in the scientific community we use such indicator as the index of efficiency, which reflects how quickly the articles in the scientific community published in the journal become known and recognized. At the same time, the impact factor as one of the scientometric indices has inherent definite disadvantages, the main of which - the stimulation scientific edition to the artificial reduction of the number of published articles, instead of increasing demands to improve their scientific level. It is necessary to develop a method of assessing the significance of the journal for the scientific community, preserving the dignity of the impact factor and reduce its disadvantages. Application of extra scientometric indicators, in addition to the impact factor and the index of efficiency, will allow assessing the importance of the journal for the scientific community more objectively. Methodological bases of the research are: a systematic approach (considering science as a social institution in close connection with the society as a whole), metasystem approach (considering the scientific community as a metasystem, i.e. a system with a relatively independent components), qualimetric approach (considering the importance of the scientific journal as a latent variables that reflect a variety of criteria), sociological approach (considering the scientific publication as a social system, the intensity of interaction with other society)