The effectiveness of mining minerals and ensuring the profitability of the enterprise is always one of the pressing issues, and this problem cannot be solved without new technologies, innovations. It involves the modernization of technical means, the automation of all production processes or the development of new, modern methods of their organization. Including, computer technology, Mathematical, Physical Modeling is one of the most effective solutions in the present day in preventing the consequences of economic, social and environmental risk that may arise, providing the opportunity to predict the processes of mining, extraction, transportation of ore. This article explores the computer model of reducing loss and dilution.
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In this work, a mathematical model of the concentration distribution of gallium and antimony elements theoretically doped into silicon by diffusion method was studied using the MathCad program. The essence of theoretical calculations and mathematical modeling of the diffusion process is not to waste experiments, to determine in advance the depth of penetration of the impurity atoms into silicon from diffusion, and to plan the experiments and increase the productivity of the results.
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Statistics have indicated that industrial accidents of ammonium nitrate were primarily caused by uncontrolled external fires where heating was dominantly controlled by radiation, and yet existing studies at milligram scale cannot fully simulate the real fire scenarios. To explore the pyrolysis behavior in typical fires, this study conducted thermal radiation experiments using pure ammonium nitrate, and its mixtures with copper oxide and sulfuric acid. Different from the pyrolysis process identified in milligram scale tests, the bench-scale pyrolysis of ammonium nitrate under radiation consisted of four stages. Pyrolysis structure model of each stage was built to reveal the differences in dominated thermal behavior. Results indicated that two additives had different thermochemical effects on pyrolysis of ammonium nitrate. Sulfuric acid accelerated the reaction rate of each stage by generating catalytic nitric acid; copper oxide reduced the number of reaction stages into three via surface absorptions. The time and mass loss rate of different stages were determined. Recommendations on effective emergency response were made to prevent the transition of slow decomposition into fast decomposition, and thus to intervene the fire-induced domino effect of ammonium nitrate. This study helps to understand the pyrolysis behavior of ammonium nitrate under fire exposure, and provides insights for pyrolysis modeling and firefighting in industry of interest.
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In this work, the Zeeman effect. Simple and complex. The electron moves in the atom. Since this motion is not rectilinear, the electron has an angular momentum (in classical physics, the angular momentum of particle relative to some origin is determined by the vector product of its radius vector and momentum, here m - the mass of the particle, v - its velocity, r - the radius vector). This formula is considered inapplicable for microparticles, since the radius and velocity cannot be determined simultaneously (See to the uncertainty relation). The moment of momentum because of the movement in space is called orbital. According to quantum theory, the modulus of the orbital momentum vector are equal, here l - the number of orbital quantum which takes the values 0, 1, 2, ... Thus, the angular momentum of the electron L, like the energy, is quantized, namely, takes discrete values.
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This article provides information on the main changes and additions to the state standard “Uz SS 3485 Road traffic lights. Types and basic parameters. General technical requirements. Test methods.” developed in Uzbekistan. When developing a new state standard, the standards of developed countries were studied, including MUTCD (USA), RILSA (Germany), Manual R310E (Norway), GSPMSLI Section 3.2 (Israel), SS R 52282 (Russia) were studied and harmonized with international standards of “Commonwealth of Inde-pendent States” SS 33386, SS 33385
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This article focuses on moving production and adapting it to market requirements. It also analyzes a particular enterprise by taking and examining the production system and examining the causes and consequences of its future income and whether its current year's income is low or high. If the income is high, this is a good conclusion, if the income is medium, the factor that causes it will be found and it will be improved. If the income is below the average, the factors that pull the enterprise back are sought and they are revised. The modification is reversible if possible, and this factor is removed if it is not possible to re-benefit from it, that is, it is not overpriced by its re-production.
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In industry asynchronous electric motors are widely used. There are issues associated with commissioning. Failure of electric motors occurs if these problems are not eliminated. In this article, we will look at some of the most effective and efficient methods.
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In the practical experiments of this research work, various additives and fillers added to increase the heat resistance of the acrylic-styrene composition coating. In order to study the thermal stability of the obtained sample, as well as to draw the appropriate conclusion, the derivatographic and thermomechanical parameters of the coating sample were obtained and analyzed in special measuring instruments. According to the results of the analysis, it found that the resistance indicators of the acrylic - styrene coating sample obtained in practical experiments are positive.
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Land resources are a key factor in ensuring food security in many countries of the world. This is because land is the main resource for the production of crops, which provide people with food and are a source of income for many agricultural producers. However, the use of land resources for food production often faces challenges such as land hunger, inefficient land use, soil degradation and loss of biodiversity. Therefore, it is important to ensure the sustainable use of land resources in order to ensure food security today and in the future.
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The article discusses the role and importance of composition in visual arts in art universities, with a focus on Uzbekistan's rich cultural heritage in practical art. It explores the history of art in Uzbekistan, from prehistoric times to the present day, and how it has influenced the development of art education in the country. The article also discusses teaching methods and methodologies in art education, including literary, observational, and experimental methods.
27.05.2023 Volume 2 Issue 5 View more Download
SCIENCE & INNOVATION