Kuban State Technological University
Author list of organization
List of articles written by the authors of the organization
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COMPARATIVE ANALYSIS OF MODELS OF VENTILATION OF THE SUBSTRATE WITH THE COMPOSTING
DescriptionIn the article we consider the questions of modeling of temperature changes in the composting process, the changes of oxygen concentration and temperature with the air from the environment, produced the effect of composting heat exchange mass with the environment, the selected state variables and the control bioreactor, the dependence of the coefficients of the system equations of motion from the variable state of the object. This article was prepared in the framework of the scientific project 16-48-230441 a(R) "Mathematical modeling of the processes occurring in the automated installation for year-round production of organic fertilizers in the conditions of the Krasnodar region", financed by RFBR and the administration of the Krasnodar region
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MODELING OF MANAGEMENT SITUATIONS IN CONSTRUCTION OF REAL ESTATE OBJECTS
DescriptionThe article proposes an approach to constructing a methodology for modeling managerial situations in the construction of real estate objects using a hierarchical system and choosing a developer company to be charged with the construction of real estate. A comprehensive methodology has been developed on the basis of which it is possible to forecast problem situations that arise during the construction of a real estate object and conduct a scientifically valid choice of a developer company
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01.00.00 Physical-mathematical sciences
DescriptionThe time-optimal diagram of movement of the executive body of the precision DC drive with elastic shafting with constrains of maximum current and the fifth derivative of the speed has been designed. The algorithm has been developed to determine the parameters of the time-optimal diagram of movement of the executive body of the precision DC drive with elastic shafting with constrains of maximum current and the fifth derivative of the speed. The region of existence of the time-optimal diagram of movement of the executive body of the precision DC drive with elastic shafting with constrains of maximum current and the fifth derivative of the speed has been set. According to the results of the numeral experiment, the dependences of the duration of the cycle of movement of the executive body of the drive from prescribed displacement (rotation angle) for different values of the fifth derivative of the speed have been plotted
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Description
This article proposes an approach to teaching mathematics in high school, based on the application of application software packages, which is especially relevant in connection with attempts to transition in the upper grades to profile education, when the student chooses the direction of more in-depth study of subjects, based on his own inclinations. The substantiation of necessity of development of methodical positions and recommendations on use of packets of applied programs on lessons of mathematics in the senior classes of high school is given. The analysis of existing packages of applied programs for teaching mathematics in high school is carried out. During the research, packages used for solving mathematical problems are considered: MS ESCEL, STATISTICA, MATCAD. Known packages of applied programs are classified according to groups of applications in mathematics lessons. Approaches to the use of application packages in math lessons during the pedagogical experiment have been tested. The pedagogical experiment was conducted on the basis of the State Budget Professional Educational Institution of the Krasnodar Territory "Beloglinsky Agrarian Technical Technical School". The analysis of the results of approbation is carried out and recommendations are made on the application of application software packages in mathematics lessons in high school
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Description
The article formulates and solves the task of discrete control in the thermophilic stage of the composting process. It is shown, that considering the relay control entity to maintain specified process conditions requires the organization of the sliding mode. We have solved the problem of minimizing the temperature deviation of the substrate from the set values and the deviation of the oxygen concentration in the gas phase of the bioreactor from the specified values. The article shows an algorithm to compute the discrete control of the composting process in the thermophilic stage. This article was prepared in the framework of the scientific project 16- 48-230441 a(R) "Mathematical modeling of the processes occurring in the automated installation for year-round production of organic fertilizers in the conditions of the Krasnodar region", financed by RFBR and the administration of the Krasnodar region
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HARDENING AND SOFTENING OF CLAY SOIL
DescriptionHardening of clay soil manifests in the form of increase of the resistance of sample to shear deformation. The shear tests of normally compacted and overcompacted soils give values of peak strength at small strains and long-term strength at high. A shear test with constant strain rate of deformation (CRD) with continuous recording of resistance encounters uneven resistance change and the cyclical rate of change of resistance (RCR). The identification of cycles of the SIS allowed us to divide the deformation in each cycle for elastic and inelastic, corresponding to the ascending and descending branches of cycle. On an interval of the total resistance, the increases of the increment of inelastic strain are positive up to some critical value of the total deformation of the sample at which their sum reaches a maximum. This maximum is adopted as a measure of hardening. With further shearing of the sample, inelastic increments are negative, and their sum is monotonously decreases and reaches negative values for the total destruction of the sample. This value is taken as the softening. A symptom of total failure of the sample is the decline of absolute values of inelastic increments of resistance to zero. In general, the trend of the increments of inelastic and elastic increments of the resistance of the sample indicates the development of the destruction of the soil sample on the sliding surfaces and, in particular, yielding of the total surface. The sum of elastic increments of the resistance monotonically increases throughout the shear
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Description
The article describes the methodology for analyzing the break-even of multiproduct production; it emphasizes the value of analysis of break-even and targeted profit planning because this approach allows you to assess the profitability of certain types of products, establish the "safety margin" of the enterprise and plan the sales of products that provide the desired value of profit
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PHYSICAL MODELING OF ODOMETRIC COMPRESSION OF SAND
DescriptionThe odometric compression of sand with constant rate of loading (CRL) or constant rate of deformation (CRD) and continuous registration of the corresponding reaction allows to identify the effect of stepwise changes of deformation (at the CRL) and the power reaction (at the CRD). Physical modeling of compression on the sandy model showed the same effect. The physical model was made of fine sand with marks, mimicking large inclusions. Compression of the soil at the CRD was uneven, stepwise, and the strain rate of the upper boundary of the sandy model changed cyclically. Maximum amplitudes of cycles passed through a maximum. Inside of the sand model, the uneven strain resulted in the mutual displacement of the adjacent parts located at the same depth. The growth of external pressure, the marks showed an increase or decrease in displacement and even move opposite to the direction of movement (settlement) the upper boundary of the model ‒ "floating" of marks. Marks, at different depths, got at the same time different movements, including mutually contradictory. The mark settlements sudden growth when the sufficiently large pressure. These increments in settlements remained until the end of loading decreasing with depth. They were a confirmation of the hypothesis about the total destruction of the soil sample at a pressure of "structural strength". The hypothesis of the "floating" reason based on the obvious assumption that the marks are moved together with the surrounding sand. The explanation of the effect of "floating" is supported by the fact that the value of "floating" the more, the greater the depth
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Description
Results of modeling of deformation of a band saw in a cutting zone are presented in article. Also the experiment by definition of deformation of a saw and loss of her stability has been made
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Description
The article presents the results of the studies necessary to conduct a comprehensive assessment of the status of occupational safety and make recommendations for keeping it in the given parameters, at machine-building plants, staffed by cut-off machine tools and auxiliary equipment for their operation. The necessity of the development of the structure of the OSH management system. We have presented a device with which you can carry out a qualitative assessment of the state of labor protection at the enterprises of mechanical engineering and the procedure for applying OSH audit system, which allows to identify the weakest points in the system of OSH management, based on the results of which form the management decisions to maintain it in the given parameters