№ 99(5), May, 2014
Public date: 30.05.2014
Archive of journal: Articles count 106, 257 kb
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SUMMARY OF EXPERIMENTAL RESEARCH OF GASOLINE AND OIL FRACTIONS
Description
In the article we present the results of pilot studies of petrol and oil fractions; their main physical and chemical properties, density and DNP, a liquid phase, two-phase area, critical area and boundary curves are considered
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RESULTS OF EXPERIMENTAL RESEARCH OF IMPROVED POTATO DIGGER KTN-2V HARVESTING PROCESS
Description
In the article we have proposed a program, an object, a methodology and results of field studies of the improved potato digger KTN-2V equipped with the original device for separation intensification
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Description
In this article we present the analysis of all the theoretic approaches for modernization and maintenance of historical centers of the cities by the design sources in the point of view of systemic approach to the investigation of the problems. It is revealed that in the concerning area there is a wide experience of investigations and also a big number of various attempts of creation and development of methodological apparatus, which determines the strategy of application of the design products to urban environment in general and to historical environment in particular. However, the complex of scientifically-based solution of the problems in indicated sphere has not developed yet, and as a consequence, the common strategy of maintenance and modernization of historical centers by the design sources are not determined yet. These results of carried out investigations can become a basis for the development of systemic approach for conflict-free penetration into natural historically formed context of the design objects and the saturation of the existing environment
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A METHOD OF CONSTRUCTING A MATRIX OF STATES OF THE DIAGNOSTIC PARAMETERS OF BRAKE SYSTEM OF A CAR
Description
The article describes the method of determining the list of rational diagnostic parameters of the brake system of a vehicle using the theory of probability and mathematical statistics. The problems determining the statistical probabilities of failures on objects considered a run; mathematical models (regression dependence) the probability of failure of run; A statistical evaluation of the significance of the coefficients of regression models; verification has been made on the adequacy of the regression models; the probabilities of possible states of objects. On the basis of the construction and analysis of structural- effect model brake system information and calculates the importance of each monitored parameter using the notion of information entropy, determine the parameters to be diagnostic, and builds a matrix condition of brake systems for non-destructive testing, in order to move on maintenance and repair of the actual state
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COMPARISON OF RADIATION SOURCES FOR PLANT GROWING BY LUMINOUS ENERGY UNIT'S COSTS AND ANALOGS
Description
The article considers the method of comparison of radiation sources for plant growing by photosynthetic energy units or analogs costs, evaluation of critical values photosynthetic active radiation efficiency at which light-emitting diodes comparable by photosynthetic energy unit's costs with the most common alternative sources for irradiation of plants – high pressure sodium lamps
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REGRESSION ANALYSIS TO PREDICT THE AMOUNT OF WORK WHEN REPAIRING ROADS
Description
The article is an example of planning funds for the maintenance and repair of roads in the asphalt performance given their excessive wear during winter
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SUBSTANTIATION OF THE PARAMETERS OF AN ARTIFICIAL RAIN
Description
In the article we have analyzed the expediency of application of the method of calculation of definition of supposed (not washing away) speeds of water streams on a limiting condition for the Kabardino-Balkarian republic; criteria for a choice of parameters of a modeling rain are proved
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AGROTECHNICAL EFFICIENCY OF THE COMBINED SOIL-CULTIVATING UNIT
Description
In the article, we have stated the agro-technical requirements to a pre-seeding processing of soil. The results of experiments of the combined soil-cultivating unit are resulted. Operating modes of the unit with optimum width of capture, uniformity of a surface of soil, quality of crushing the soils meeting agro-technical requirements are proved
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Description
The article analyzes the existing classification of leveling devices and their design features. We have found that currently the form of the seed layer is achieved with harrowing cultivation in 2 ... 3 tracks , leveling and packing rollers in 3 ... 4 passes units on the field, which leads to an increased cost of fuel, living labor, as well as compaction of arable and subsoil layers of the soil. We have also proved a constructively scheme of a com-bined device capable to form the seedbed in accordance with agronomic requirements in a single pass
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MATHEMATICAL MODELLING OF PROCESS OF WORK OF THE COMBINED SOIL-CULTIVATING UNIT
Description
In the article, we have considered the questions of mathematical modeling of a combined soil-cultivating unit. Theoretical dependences and rational values of parameters and unit operating modes are received
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