The model of the universal soil-processing instrument has been developed. The model is represented as an aggregate of discrete elements; the instrument is repre-sented as an aggregate of elementary planes. The model has allowed to study phases of instrument pro-cessing and to assess the quality of tree planting cup
The article presents a mathematical model of the interaction of vibration control the working body of the roots carver with soil and plant roots to optimize the design parameters roots carver
The mathematical model of working unit co-operation of plant lifter with soil and roots of plants for optimization of plant lifter’s different parameters is developed
The models of the estimation advertising effectiveness are reviewed and analyzed in the paper. The algorithm and example of the program’s work, which determines financial performance of the company with taking into account advertising investments is described and the mostly important results are discussed
This article investigates hydrodynamic of experimental electrochemical cell with rotating disk in the cation exchange membrane. We have also investigated the flow in open, with the free surface of the solution and in hermetically closed cells. The main regularities of the hydrodynamics of the experimental cell at its real size were set
The analysis of scientific research in the field of food technologies has shown that mathematical modeling is applied in the following directions: adjustment of the modes of technological processes, development of compounding and quality evaluation of ready-made products, and also prediction of shelf life of new products during launching. Models of variance and regression analysis with application of methods of mathematical planning of experiment are most relevant in describing the processes of food production. The article contains the results of our own research about creating composition of fish preserves made of combined minced of fishes, bad-ripening and ripening in salting. The mathematical models of the dependence of organoleptic, structural-mechanical characteristics and characteristics of ripening of preserves on technological factors are presented. The dimensionless generalized index of quality was modeled and the composition of minced was optimized on the basis of its dynamics. It was established, that preserves which contain 42% herring Atlantic and 4,8% salt, have the best organoleptic, structural-mechanical and ripening characteristics. The regression model was developed, which determines the shelf life of wide range of fish preserves, depending on factors affecting it: storage temperature, acidity of the fill, proteolytic activity of the enzyme system of muscle tissue and also the speed of fish ripening, caused by addition of various functional and technological additives. Testing of the model shown, that calculated data of the shelf life of fish preserves correlate with the data obtained experimentally
MATHEMATICAL MODELING IN THE SYSTEM OF STRATEGIC PLANNING OF ECONOMIC SUBJECTS IN THE TOURISM SPHERE
The sphere of internal tourism is one of the state
priorities of the Russian Federation. The development
of tourism in the Crimea will ensure the integration of
the region into the Russian economy. The main
instrument of using the competitive advantages of the
tourist destination is Crimea - public-private
partnership (PPP). The state has formed a legislative
base for the use of PPP. The main role in the dynamic
development of tourism business belongs to business
entities. For the hospitality industry, the challenge is to
build an effective management system in which
strategic planning plays an important role. The
analysis of the strategic planning processes at the level
of economic entities in the hospitality industry
revealed a number of problems, one of which is the
failure to use progressive methods of strategic
planning, including mathematical modeling. The
purpose of the study is to determine the directions for
improving the strategic planning of economic entities
by developing a qualitative model of the organization's
development that will allow to form an information
base for making sound strategic plans. To determine
the construction of a qualitative model of the
development strategy of organizations in the sector
under study, it is proposed to use a number of average
industry indicators obtained by summarizing
individual indicators: the efficiency of economic
activity (Y); financial stability (X). The trend
modeling (Y) indicates positive moderate dynamics,
while the generalized indicator Y reaches 55.7826 in
2021. Similar results were obtained in modeling the
generalized index of financial stability. Both analyzed indicators X and Y change the direction of their
dynamics to the opposite - upward, starting from 2016,
which indicates a favorable industry-wide situation.
The results of the analysis will make it possible to
increase the validity of managerial decisions when
formulating strategic alternatives and choosing the
optimal development strategy
The work describes the mathematical model of an antibacterial immune reaction, which is presented as a system of integral-differential equations. The global characteristics of the adequacy of the model to the real process are studied
The article presents a mathematical model of the effect on ion transport electro convection salt in non-smooth camera channel desalting electro dialysis apparatus in the presence of forced convection. The basic rules of process of electro convection are revealed
Sanitization of eggs is an essential way to fight bacteria, fungi and other microorganisms. Hatchability of eggs and the safety of day-old chicks are dependent on the quality of eggs processing. Leading scientists of our country have proved high efficacy of ozone application for processing of hatching eggs. To obtain a positive result by this method of sanitizing hatching eggs ozone, it is necessary to create a uniform concentration of ozone around the egg store volume. Decrease in ozone concentration from the set point may result in insufficient exposure to pathogens and because of this, may reduce hatchability. Significant excess of ozone concentration from the set point can kill the embryo. Because of mathematical modeling of electro eggs ozone treatment process, there was a mathematical model of the process of electroozonation of egg stores of poultry farms. This model takes into account decomposition of ozone on the surface of eggs and decomposition of ozone on the walls of an egg store. This mathematical model proves the desired control action at different initial data, such as: the required concentration of ozone in the egg store, the number of eggs, egg store geometric dimensions, the fan power, the design parameters of the discharge unit, the location of the ozone generator in the room