05.00.00 Technical science
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Description
Russia starts working on creation and implementation of the utilization system for different types of withdrawn equipment. Expediency of creation of this sectoral system in Russia is proved in the article. Ability of the system creation is considered. Recommendations for the ability rise are also given
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MATHEMATICAL AND INSTRUMENTAL SUPPORT OF A POST-GRADUATE EDUCATIONAL PROCESS
DescriptionEducation was always an important part of the development of the individual and society, because education is the process of the formation of mind and character. Each level of education currently requires increased attention, since the quality of life of future graduates directly depends on the quality of the provision of educational services. Despite the fact that most of the educational process is formalized by educational standards, regulatory documents and local acts of educational institutions, this area continues to need both automation and the development of various models, methods and techniques, the use of which will greatly optimize the implementation of the educational process. There are few software products, models and methods that assess the quality of education and the educational process in general, aimed at individual elements of the educational system. In all the existing, basically, there is only support for working with bachelors, slightly less often with masters and very rarely with graduate students. This article describes methodological approaches to assessing the achievements of graduate students, as well as an information system for supporting the educational process of graduate school
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Description
The article considers the mathematical task of calculating the transient flow of water in the regulation of concentrated releases of water discharges on stream flows in lower tails of spillway waterworks. An algorithm, analytical solutions based on hydraulic calculations of the process of propagation and transformation of long waves described by Saint-Venant equations are constituted. These equations are nonlinear and have no exact solutions. To obtain approximate solutions these equations are linearized. The efficiency of spillways depends on how accurately hydraulic processes characteristics are measured. Control and direct measurement of characteristics of hydraulic processes in natural conditions is difficult, which requires applying methods of mathematical modeling and simulation studies of transient processes, which are based on the algorithms of functioning of transient hydraulic processes control. Introduction of the developed method for hydraulic calculation of discharge releases to streams, diverting the water from water discharge structures, allows optimize idle and non-technological discharges of water from reservoirs. Considering the highly dynamic nature of the water flow in the lower tails of the dams at concentrated releases of water discharges from reservoirs, development of new methods of hydraulic calculation of extreme discharges and water depths at the critical sections of watercourses with transient regime of water flow is an important task
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THE SMALL SIZED UNIT MAINTENANCE MODELING
DescriptionAn integrated mathematical approach to modeling functional and structural parameters of a mobile technical service was observed in the article, and also, we reviewed their technical and economical work indicators. The authors propose evaluation criteria and the structural scheme of small sized units of technical service machines. For the attached unit option a combining service snap method is described and the service cost analysis in comparison with trailed analogues is made
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COMPARISON OF SPECTROGRAMS OF THE MOST ACOUSTICALLY LOADED MODES OF OPERATION OF HARVESTERS
DescriptionNowadays the method of finite elements (MFE) is a standard method of acoustic analysis. It consists in finding the solution of the function on the maximum allowable quantity of piecewise continuous functions that are determined in allowed number of subdomains. The number of sub-domains has a finite value but an unknown continuous value is approximated by the polynomial on each element that acquires specific values in the nodes. Polynomials can be various but all of them produce continuity of total value along its limits. Herewith because of technical features of the calculation process minimization of numbers of polynomials is required according to the criterion of acceptable precision. In the chosen COMSOL Multiphysics program model the range of frequencies under analysis is the result of the sum of 10 segments (sub-ranges). Such a sub-range is a minimal discrete value in certain conditions of calculation. Thus, the calculated value on this subrange can be considered as the result of calculation by means of using the band-pass filter with 35 Hz bandwidth. Because of this, we can draw a conclusion about changing the state change of the noise exposure on the combine operator with respect to the previous measurement according to the regulatory methodology. Hereinafter if the stated change of the noise exposure is found, measurements that are more precise are taken. On the basis of these measurements the head of the company receives recommendations either on verification of stated acoustic characteristics of devices and mechanisms of a harvester or on verification of acoustic ways of transmission of structural noise (noise created by devices that penetrates into the booth through the combine body), or on verification of noise isolation of the booth
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JUSTIFICATION OF SUNFLOWER SEED CLEANING SCHEME ON AIR-SIEVE GRAIN CLEANING MACHINES
DescriptionA set of actions aimed at preserving seed quality is the task of primary importance, which is expected to produce effective results. To implement this task it is necessary to prepare high-quality seeds by cleaning and sorting sunflower seeds on air-sieve grain cleaning machines. To determine the rational scheme of cleaning sunflower seed piles of the ‘Lakomka’ variety on the air-sieve grain cleaning machine ‘MVU-1500’ a qualitative analysis has been carried out. Cleaning sunflower seeds is carried out by an air stream by one or two sieves for separating large impurities and by two sieves, one of which separates milled seeds into the overseeding ,with the second dividing the whole seeds. In such a scheme of cleaning sunflower seeds, purity corresponds to the 3rd class of seed material and has some disadvantages. The disadvantages are as follows: the gathering seeds in sieve Ø5.0 have low individual weight and the sieves show low quality of work. To facilitate the work of the sowing sieves a grading sieve is installed, which will separate 50% of the seeds into the gathering. The size of the openings in the grading sieve is selected with the help of the correlation table. The sieve for sunflower seed variety ‘Lakomka ‘will be Ø 3.6, which will select the most valuable seeds with weight above 90 g from the purified material thus improving the productivity and performance of the sowing sieves. A promising scheme of cleaning sunflower seeds is the air flow rate equal to 4.43 m/s, with one grading sieve of Ø 3.6 and two sieves of Ø 7 and Ø 3.6 mm in grain cleaning machines that will allow you to get high quality seed material that meets the requirements of GOST(Russian national standard) for seed material
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Description
In the study of the processes of growing, harvesting, post-harvesting processing and delivery of fruit and vegetables it seems to be rational to have generalized control of the "product – environment – packaging – transport - storage" in general, as well as providing the possibility of creating optimal conditions for fruit and vegetable products depending on its condition. The basis of ensuring product integrity at all stages of production is a system approach with application of modern information technologies. Optimization of logistic processes in the agro-industrial complex (AIC), in addition to cost, market influences many important indicators of the final product of this complex: quality, timing and reliability of supply, the size of the delivered batches, etc. The quality of fruits and vegetables begins to change dramatically immediately after harvesting. Being in a stressful and unfavorable conditions, fruit, vegetables, root crops intensively lose moisture and consume nutrients, secrete aromatic substances, carry out the breathing process. These losses are caused by biological factors fit fruit and vegetable products to the changed conditions. Thus, the main indicators of the quality of products to control rationally in the process of harvesting and subsequent production phases take into account the data obtained to optimize process parameters to reduce losses and damage products. The article discusses the prospects of applying the system-information approach to the formation of quality of fruits and vegetables during transportation and storage. The proposed embodiment of a generalized control of the "product – environment – packaging – transport - storage", aimed at ensuring the possibility of creating optimal conditions for easy-to-sell agricultural products (fruits, vegetables, root crops) depending on its condition. We have established that rational technology of production and sales of products must have the ability to control and operational adjustments depending on the level of quality input products from the stage of harvest
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Description
The aim of the study was to improve evaluation of the uniformity of irrigation with a machine of continuous translational motion, according to the test results of the apparatus with radial methods. Research method – mathematical modeling of the running of four machines of circular actions on a device of continuous translational motion using the result of the tests of the device with a radial method. The algorithm of calculation, recommended by the standard ISO 7749-2-2004, has been improved to minimize manual calculations and measurements. The algorithm is implemented in a computer program. Program of CDU(B) implements an advanced algorhythm. The program calculates a matrix of irrigation doses on meter squares area of spray irrigation between the positions of the two devices. The progressive movement of the machine is modeled by summing the doses in column-major order with constant X. At vector doses after the passage of the machine, it calculates the coefficient of uniformity of irrigation by Christiansen. The calculation is performed at different steps of the installation of devices, and so it determines the optimal location of them. The improved algorithm of calculating the figures of sprinkling uniformity using the test results for devices using a radial method was implemented in the program of the CDU(A) [1]; it allows to choose the optimal step for installation of devices. The algorithm of calculating the uniformity in the step of installation of the apparatus on the pipeline which is greater than the radius of the irrigation apparatus simulates the operation of two devices. During the installation step of the apparatus of smaller radius than irrigation apparatus, we model the work of four adjacent devices. The optimal step of installation of i-Wob is 14.5 meters, which is 1.75 times greater than the radius of the irrigation system and 1.5 times greater than the pitch of stationary devices with the same tolerance on the uniformity. Two-nozzle devices, which assessment standard does not meet the requirements of the uniformity of irrigation at the drive of the translational motion ensures a better distribution in the pitch of less than 24 meters
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THE PRACTICAL IMPLEMENTATION OF INDUSTRIAL ENVIRONMENTAL MONITORING FOR CAR SERVICE ENTERPRISES
DescriptionIn the article, we give examples of practical realization of the implementation of industrial environmental control for service centers. In order to conduct environmental activities at production environmental control there was developed appropriate documentation, with instructions of the list and timing of the events. Due to the organization of production environmental control at the enterprise of the service center there was a timely opportunity to implement environmental activities, and solve problems in the field of ecology detectable in the control period. To solve problems identified in the implementation of industrial environmental control, the car service enterprise took measures to ensure efficient wastewater treatment, equipped closed places and recycling. The article provides general insights about the necessity and appropriateness of the organization of industrial environmental control. Principles of organization and implementation of industrial environmental monitoring outlined in this article can be applied by enterprises of various economic activities
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THE TASK OF FORECASTING OF PUBLICATION ACTIVITY
DescriptionIn the article questions of forecasting of publication activity and a problem of planning of actions on management of publicity activity of scientific collective are considered