RESEARCHING LAWS FOR THE DISTRIBUTION OF RANDOM QUANTITIES BASED ON EXPERIMENTAL DATA OF COMPLEX TECHNICAL OBJECTS. Tuganov G.Sh. – researcher, Makhmudov N.A. – Ph.D., professor, Abijanov Z.F.- instructor, Bahriddinov Z.Sh.- instructor.
There are many methods of diagnosis of complex technical systems, which are used to predict the upcoming faults, operated in combat units of equipment. One of the main diagnostic methods including statistical processing of vibration data on certain operating times of the engine is given. Generalized and systematized the data of the power plant is given in the Laplace function, where a histogram, which can be described uniform distribution of informative value for predicting malfunction of aviation equipment on future flights. Key words: statistical mathematics; technical condition; stochastic data; flight data recorders; distribution law; mathematical expectation.
INNOVATIVE TECHNOLOGIES IN EVALUATION OF PROCEDURES IN RIVERBED A.M. Arifjanov – DSc., professor, Sh.B. Akmalov -PhD I.G. Akhmedov – doctoral researcher, D.E. Atakulov - assistant Tashkent Institute of Irrigation and Agricultural Mechanization Engineers
Article deals with the use of modern GIS (geographic information system) in the study of the deformation processes in the river. The most difficult problem in obtaining information on erosion and accumulative process is rapid assessment of the process. In the researches analyzed the possibility of using GIS technologies in the assessment of deformation processes in the foothills of the river, which have a highly variable nature. This information helps to draw conclusions about changes and events in nature. Study included collection, analysis and delivery of data to users with using GIS. The deformation processes in the river bed were evaluated and analyzed using Landsat satellite data. The researches described how to achieve a quick assessment of their processes. Key words: Remote Sensing, image analysis, satellite, method, map.
JUSTIFICATION OF HYDRAULIC PARAMETERS IN THE DESIGN OF OPEN DRAINAGE. M. Otaxonov-assistant, D. Allayarov-assistant, I. Axmedov- researcher Tashkent Institute of Irrigation and Agricultural Mechanization Engineers
In this article the tasks of open drainage are shown in improving the ameliorative condition of the sown areas. The scientific recommendations of scientists in the design and construction of drainage are considered. The aspects affecting the hydraulic processes occurring in the channels of open drainage are analyzed. The hydraulic parameters of open drainage used in the Syrdarya region are analyzed. The results of studies to improve the performance of open drainage are revealed. The effect of flow capacity on drainage efficiency is estimated. The results of calculations of the throughput capacity of the drainage flow in two sections are studied and disclosed. The bandwidth increase by 62 percent is justified, while the flow rate increases by 25 percent. From a hydraulic point of view, methods are shown to increase flow capacity. Scientific recommendations on the justification of hydraulic parameters in the design of open drainage are given. Key words: drainage, course, expense, speed, stream, deposits, permeability.
His research aim was the intelligent pH range control system in agricultural watering pump stations based on Adriano pro mini microcontroller automation control with GSM control. This kind of intelligent control system which combination the pump unit with a water filter. It helps to control the salt level of the field with a reverse osmosis plant and supply the water if required. In this research embedding a control system into an automatic water pump controller depend upon the pH range. The intelligent pH range control system in the agricultural fields designed in the research had wonderful effort of man-machine interface, it is straightforward, cheap and convenient high degree of an automation system. Not only that this system helps to prevent wastage of water. This system is a prototype, which makes this self-sufficient, watering itself from underground water. This system can use saltwater from underground waters and give chance to economize pure water this side of this system makes it more environment-friendly. Key words: ATmega328, Arduino IDE, GSM D800, watering, salt water, pump stations, watering automation control system, pH sensor.
LAMINARY FLUID FLOW IN A PIPE AND DIMENSIONAL NUMBER OF REYNOLDS. Sh.A. Mengliev Termez State University Kh.F. Kholturaev Tashkent Institute of Irrigation and Agricultural Mechanization Engineers
The article provides information on the mathematical modeling of the incompressible viscous fluid in the pipe. The study shows laminar and turbulent regimes of fluid motion, as well as the physical meaning of these regimes. Consider a straight round pipe with a diameter constant along the entire length. The flow rate on the walls of the pipe due to adhesion is zero, in the middle of the pipe, it has the greatest value. A cylinder with a characteristic length and a characteristic radius inside the liquid whose axis coincides with the axis of the pipe is considered and the flow of the liquid through the cylinder is studied. The calculation formulas for calculating the maximum flow velocity in the cylinder, the volume of liquid passing through the cross-section of the pipe, the coefficient of resistance to friction in the pipe along the flow length, and the maximum value of the tangential stress are derived. The results of comparison of empirical and semi-empirical formulas for calculating the coefficient of resistance to friction are presented [1]-[5]. Key words: Reynolds number, laminar flow, turbulent flow, parabolic flow, the friction force is the integral coordinate of the pipe, viscosity, density, bulk flow velocity, average speed, maximum speed, radius, Gegen, Poisal, Darcy-Weisbach, the volume of fluid resistance coefficient.
VIRTUAL WATER TRADE IN AGRICULTURAL PRODUCTS IN THE REPUBLIC OF UZBEKISTAN. M.R. Li - PhD Tashkent Institute of Irrigation and Agricultural Mechanization Engineers
The article reveals the essence and justifies the relevance of virtual water research, provides a methodology for its calculation and analysis of the content of virtual water of agrarian crops and livestock products of the Republic of Uzbekistan, moreover comparative analysis of different sectors of the economy is given in this paper. The relationship between the contribution of agriculture to GDP and the income of the population is being proved in the paper. The scientific conclusions based on the results of the analysis, are worked out and the recommendations that help to conserve the limited water resources of the Republic of Uzbekistan are given. Key words: virtual water, agrarian crops, livestock products, methodology, food production, import, export.
The increase of economic efficiency of entrepreneurial activity in the sphere of production of poultry farming based on introduction of innovative technologies is considered, the methodology of management of the innovative development of a poultry farm adapted to branch features is developed. The proposed model provides to the organization of innovation activity for systematic monitoring of the R&D industry market. In addition, it provides the implementation of a preliminary assessment of innovation in terms of its scientific and technical viability, efficiency and feasibility, the formation of a database of sectorial innovations, the coordination of the analyzed innovation project with the enterprise strategy and its inclusion in the innovative program of the poultry farm. Proposals are presented on improving the organizational structure of poultry enterprises. Key words: innovative development, globalization of agrarian markets, the efficiency of entrepreneurial activity, the introduction of innovative technologies.
DETECTION OF URBANIZATION RATE IN TASHKENT CITY DURING THE POST-SOVIET PERIOD USING NDVI, NDBI AND BUILT UP INDEX. B. Alikhanov, U. Uzbekov, A. Pulatov, T. Ilyasov Tashkent Institute of Irrigation and Agricultural Mechanization Engineers
Urban transition is highly increasing in the developing countries like Uzbekistan. Consequently, it is elevating many social and ecological implications, corresponding air pollution, destruction of natural habitat of endemic animals and plants, social tensions, problems with infrastructure and soil sealing around the world. Therefore, studies on urban growth are becoming more important. In this article, main objective was to research the change of built up area in Tashkent city and surrounding areas during the period from 1992 to 2018. Landsat 5 TM and Landsat 8 OLI remote sensing images were used to examine urban transition using different indexes, in Tashkent city during 1992-2018. Results showed 1.6 % increase in urban areas, whereas land covered by vegetation, agriculture and city parks decreased by 5.8 % within 26 years. Key words: Urbanization, Normalized difference vegetation index, Normalized Difference Built-up Index, Built-up Index, Urban Index, Index-based Built-up Index, Enhanced Built-up and Bareness Index, Tashkent City.