Keyword: «mathematical modeling»

The article is devoted to the application of information technologies at the enterprises of agro-industrial complex of Krasnodar region for the analysis of financial-economic activity. The author also analyses the development of the agriculture sector, market of information technologies, applications software products in the activities of agricultural enterprises.

The Article is devoted to consideration of the possibilities and methodological principles of social and man-agerial process modeling intensification of innovative activity of the modern Russian industrial enterprises. Work performed in the framework of R & d temprana Project No. 383: "the Workers of industrial and scien-tific-technical sphere in the conditions of single-industry towns (for example, sociological analysis Togliat-ti)".

The paper presents the methodological foundations of teaching the mechanics of fluids at Nizhny Novgorod State Technical University named after R. E. Alekseyev, based on physical and mathematical modeling of stationary process flow in pipelines, simplest hydraulic resistance and free flows. Students perform laboratory work on physical modeling on universal hydraulic stand and mathematical modeling practical work on personal computers.

A mathematical model of business cycles based on Lotke-Volterra nonlinear equations and the Goodwin nonlinear model is proposed. Unlike the well-known mathematical models of self-oscillations of a complex system, the proposed model contains stochastic corrections that take into account external influence.

The inverse problem of determining the gas mass flow by measurements of wellhead pressure with a cross-section of the well varying in length and time is solved by mathematical modeling methods, which makes it possible to identify signs of hydrate formation in it, consisting in different dynamics of pressure and temperature distribution. The results of a computational experiment were compared for two wells of the Otradninsky gas condensate field, the exploitation of which indicates that the most likely cause of complications is the gas hydrates formation both in the bottom-hole zone and in the borehole and their plumes. The influence of geocryological conditions and pressure drop in wells on the dynamics of hydrate plug formation and on the total amount of produced gas is shown.