One of the promising and topical directions for improving the quality and safety of control of technological facilities is the use of tools that allow simulating technological processes and control ...systems on a computer before entering a real production facility. Two main tasks are solved here: personnel training and selection of effective technological modes. This article discusses the creation of a computer simulator complex for the depropanization unit of a gas fractionation plant in Unisim, which in turn should provide practical training for future specialists in the safe conduct of the technological process, thanks to an accurate mathematical model of the depropanization process. It will also help improve skills for quick response and prevention of an emergency. The decision to create a computer training complex arose in connection with the need to train personnel, improve their skills and experience. As a result of the research, a computer training sofware was developed based on the Unisim Design and Unisim Operations software package for training future operators and industrial operators to consolidate theoretical and practical knowledge.
This study aimed to determine the effect of thyroglobulin (
) gene polymorphism on milk and meat productivity in the various cattle breeds currently bred in the Republic of Bashkortostan.
The test ...was performed on dairy cattle of Black-and-White, Bestuzhev, and Simmental breeds, and meat cattle of Hereford and limousine breeds. The purpose of the test was to search for associations between the polymorphic alleles of the thyroglobulin (
) gene and economically useful traits.
All studied breeds showed a frequency predominance of the
allele (from 0.56 to 0.71). A clear trend of an effect of the genotypes of the
gene on milk-productivity indicators was revealed; cows with the
genotype have the highest milk yield and fat content in milk. The milk of cows of Bestuzhev and Simmental breeds that possessed this genotype was also characterized by higher protein content.
We identified an effect of the polymorphism of the
gene in the Hereford and limousine breeds on fat metabolism intensity indicators, such as fat output and fat content, in the longissimus muscle and in the general sample of ground beef.
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Parts of gas turbine engines from superalloys on the basis of nickel and iron are fabricated using superplastic deformation of ultrafine-grained semi-fabricated products. This article provides ...theoretical substantiation of the efficient process of severe plastic deformation for achievement of an ultrafine grain structure in disks and rods from superalloys. The possibility of accumulating the degree required for grain disintegration in workpieces under the conditions of combined deformation, mainly due to the contribution of a rotational constituent, is demonstrated. The analytical dependences of the stressed and strained state of superalloys under the conditions of combined deformation are obtained, and the required energy parameters are estimated.
The article describes a method for coordinating the microwave path and verifying the microwave module of the DMVC. The method for coordinating and adjusting the microwave module helps measure and ...evaluate characteristics of the device to confirm compliance with the DMVC requirements.
Planar superstructure defects have a great influence on the mechanical and functional properties of ternary Heusler alloys; however, their complete crystallogeometric and energy analysis is lacking ...in the literature. In this work, Heusler alloys of stoichiometric composition X2YZ of the L21 superstructure are analysed. An expression is given for finding the planes of occurrence of all possible planar superstructure defects. It is established that among them there are only shear and thermal antiphase boundaries. The results obtained are useful for analyzing slip systems of the considered family of alloys and the configuration of magnetic domain walls.
The procedure for describing all possible energy states of an alloy based on the concentration wave method proposed by Khachaturian is employed to describe all possible energy states of ordered A2BC ...alloy based on N-dimensional lattice. Within the framework of this method, a complete enumeration of the structures obtained by the superposition of N plane concentration waves with all possible wave vectors is carried out, provided that the given stoichiometry is preserved. For each such superposition, the order parameters on the first I coordination spheres are calculated, thereby determining the point in the I-dimensional order parameter space corresponding to the given structure. For the case of I = 2 it is shown that a complete enumeration of all structures generated by one plane concentration wave fills a non-convex figure in the space of two order parameters.
The paper presents the effects of gasgeochemical survey in the upper layer and water column, as well as in bottom sediments in the Tatar Strait (the North of the Sea of Japan) in 2012, 2014, 2015 and ...2017. The features of methane, hydrogen, and helium distribution in the water column and sediments of the Tatar Strait were identified. The elevated methane, hydrogen, and helium concentrations in the sediments and water column on the southwest shelf and slope of Sakhalin are possibly associated with seismo-tectonic activity, gas hydrates, the presence of centers and migration channels of these gases. Methane emission, concentrations of which exceeds the equilibrium with the atmospheric value in the surface layer (C* = 2.2–3.6 nmol/L), occurs within the whole water area of the South-Tatar Strait. The difference between the measured and equilibrium methane values (ΔC) was 1.1–112 nmol/L. The most intense methane fluxes on the water-atmosphere boundary reach up to 482 mol/(km
2
× day) and are observed on the gas-containing southwest shelf and gas hydrate-containing slope of Sakhalin. The calculation model of the current fields and impurity transfer for the water area under study has shown that formation of increased methane emissions from the sea surface is located in areas with its possible vertical migration from lithospheric sources. The role of hydrodynamics in the formation of zones of increased methane emissions from the surface of water area is subordinate to geological factors. The prospects for prediction of hydrocarbon accumulations according to the data on methane flux from the surface of the shallow sea are described.
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