JOURNAL OF “IRRIGATION AND MELIORATION”
The Theory and Practice of Human Capital Development in Uzbekistan
U.Kh.Nigmadzhanov - Doctor of Economics, Professor, National Research University “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” Abstract The article reveals the main provisions of the Human Capital Concept of its founders T. Schultz and G. Becker, a brief history of its formation. The analysis of the development of this concept by scientists of Russia and our country is carried out. Particular attention is paid to the practical reforms of the state on the growth of human capital during the period of renewal of Uzbekistan. The third side of the human personality is substantiated - the ability to invest, which, along with two other sides, underlies the author's definition of this category and its structure, taking into account the peculiarities of the mentality of the people and the goals of the country. Key words: human capital, abilities, labor resources, human resources, total labor force, wage growth, social satisfaction.
BUILDING A 3D MODEL OF HYDRAULIC STRUCTURES USING BIM TECHNOLOGY
J.A.Kasimov is an independent researcher, D. Kalandarova–masret student, National Research University “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” Abstract In the article, the role of graphic programs in the engineering sciences in the educational system, especially in technical higher education institutions, through them, we can see that the issues related to Build Art technologies, which are the demand of today, can be easily and conveniently solved. The ability to analyze the spatial properties and tasks of subjects is an important component of the graphic preparation of students. In the field of graphic education, development of students' spatial imagination, imaginative analysis of spatial images, activation of mental and cognitive activities of students, development of spatial thinking and imagination, imaginative observation and acceptance of spatial phenomena, shapes, and acquisition of all graphic knowledge and skills, keeping in memory creative qualities such as staying have been adding a significant share to the creation of content. Key words: BIM (Building Information Modeling), Graphical programs, education, analysis and results, hydrotechnical structures, 3D model, engineering computer graphics
DETERMINATION OF ENERGY SAVING WHILE PROVIDING A STABLE OPERATION MODE BY MATHEMATICAL MODELING OF STATIC AND DYNAMIC MODES OF ASYNCHRONOUS MOTOR OF EQUIPMENT FOR GRINDING FORAGE
N.B.Pirmatov – Doctor of Technical Sciences, Professor of the Tashkent State Technical University named after I. Karimov, A.T.Panoev – PhD., Associate Professor of the Bukhara Institute of Natural Resource Management national research university "Tashkent Institute of Irrigation and Agricultural Mechanization Engineers" Abstract The article presents energy efficiency by controlling the rotational speed of the asynchronous electric motor of feed grinding devices. With the help of frequency converters, you can directly control the speed by changing the frequency of the electric motor. One of the advantages of this method is that since there is a close relationship between current and torque, the frequency converter can reduce the starting current when starting the motor. When starting the engine, the engine starts smoothly and saves electricity during starting. The power factor of the universal feed grinder was calculated and analyzed by mathematical modeling using the Hurwitz criterion at 100. At the same time, in the electric drive system - the universal feeding grinder, the gain factor - 3.95 < Ку < 895 is provided for operation in a stable mode. The asynchronous motor of the universal feed chopper is optimally controlled in static and dynamic modes. Thanks to frequency control, electricity consumption can be reduced by up to 20%, and 25,920 kWt*h of electricity can be saved per year. Key words: energy saving, electric drive, frequency converter, optimal control, operating mechanisms, energy efficiency, efficiency.
THEORETICAL SUBSTANTIATION OF THE EFFECT OF TREATMENT WITH ALTERNATING ELECTRIC CURRENT ON THE VIABILITY OF GRAPEVINE CUTTINGS
N.M.Markaev – PhD, Senior Lecturer, NRU “Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” Abstract The article studies the energy properties of energy input into cuttings during electrical processing of a grape stem, taking into account the state of the system in two media (water and cuttings). It has been established that the energy absorbed by grape stems depends on the electrical conductivity of the cuttings (γ1), the volume concentration of the cuttings (X1), the conductivity of the electrically conductive liquid (γ2) and the volumetric concentration of the electrically conductive liquid (X2). As a result, it was determined that the two-environment system, i.e. the ratio between the volume concentration of grape cuttings (X1) and the volume concentration of the electrically conductive liquid (X2) is (X1 + X2 = 1), the diameter of the cuttings is in the range of 1.2-1.5 cm, the value of the cross-sectional surface (S) varies within 113.04-76.625 mm2, the electrical resistivity of the handle varies within 106.73-164.85 Ohm-m, also with the exposure time (τ) of the electric current, it is necessary to take into account the distance between electrodes placed in the working chamber (l), processing voltage (U). Key words: electrodes, grape cuttings, electric current, electromagnetic field, conductivity, electrical resistivity, volumetric concentration.