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268 results on '"Yakupov R"'

3. Gaussian Process-based prediction of memory performance and biomarker status in ageing and Alzheimer’s disease—A systematic model evaluation

Author

Nemali, A., Vockert, N., Berron, D., Maas, A., Bernal, J., Yakupov, R., Peters, O., Gref, D., Cosma, N., Preis, L., Priller, J., Spruth, E., Altenstein, S., Lohse, A., Fliessbach, K., Kimmich, O., Vogt, I., Wiltfang, J., Hansen, N., Bartels, C., Schott, B.H., Maier, F., Meiberth, D., Glanz, W., Incesoy, E., Butryn, M., Buerger, K., Janowitz, D., Pernecky, R., Rauchmann, B., Burow, L., Teipel, S., Kilimann, I., Göerß, D., Dyrba, M., Laske, C., Munk, M., Sanzenbacher, C., Müller, S., Spottke, A., Roy, N., Heneka, M., Brosseron, F., Roeske, S., Dobisch, L., Ramirez, A., Ewers, M., Dechent, P., Scheffler, K., Kleineidam, L., Wolfsgruber, S., Wagner, M., Jessen, F., Duzel, E., and Ziegler, G.

Published
2023
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9. Consideration of heat exchange in screw vacuum pump model.

Author

Laskin, A. A., Yakupov, R. R., Raykov, A. A., Mustafin, T. N., Salikeev, S. I., and Burmistrov, A. V.

Subjects
*VACUUM pumps, *SCREWS, *SCREW compressors, *COMPRESSORS, *EQUATIONS of state, *CONSERVATION laws (Physics), *MATHEMATICAL models
Abstract

Taking into account the heat exchange process leads to the increasing of the obtained positive displacement machine characteristic accuracy during mathematical modelling process, this is especially necessary for the vacuum pumps' modelling. Mathematical model of oil free screw vacuum pump is presented based on energy conservation law and equation of state. Features of heat exchange process in screw vacuum pump in comparison with screw compressor are considered. The criteria equations, described the heat-transfer coefficient between the medium and the surfaces formed the working chamber walls, are presented. Calculation of heat exchange area (case and rotor surfaces) with working medium (air) is carried out. Relationship of pumping speed vs vacuum pump inlet pressure is obtained. [ABSTRACT FROM AUTHOR]

Published
2023
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20. Geometrical model of a screw vacuum pump.

Author

Yakupov, R. R., Mustafin, T. N., Khamidullin, M. S., Khisameev, I. G., and Uybekova, L. Kh.

Subjects
*VACUUM pumps, *GEOMETRIC modeling, *GAS leakage, *VACUUM chambers, *SCREWS
Abstract

Chamber models are wildly used for a screw vacuum pump capacity calculation. Those models allow to take into account a lot of factors which have great influence on the vacuum pump capacity, vacuum and working power. The first stage of chamber models' development is a mathematic description of vacuum pump chamber geometrical parameters. This paper presents the mathematic description of time-depending vacuum pump chamber geometrical parameters, such as chamber volume, areas of suction and discharge ports, gaps parameters, which the gas leakage goes through. [ABSTRACT FROM AUTHOR]

Published
2021
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49. Features of localization of remaining oil in terrigenous reservoirs and potential for their recovery at the final stage of field development

Author

Mukhametshin Vyacheslav Sh., Kuleshova Lyubov, Yakupov Rustem, Vafin Rif, and Gilyazetdinov Ruslan

Subjects
Environmental sciences, GE1-350
Abstract

The paper considers one of the unique fields in terms of geological reserves. The paper also analyzes the development of the D3ps formation sections of the Devonian terrigenous layer of the studied field. A detailed geological and hydrodynamic model was constructed based on the consolidation of all available information. An integrated analysis of actual well performance data, field geophysical tests, geological and technical measures, results of infill drilling, as well as geological and hydrodynamic modeling confirmed the localization of reserves primarily in the upper bed of D3ps.1. The analysis of all performed studies revealed higher values of current oil saturation in the upper bed – up to 0.8 unit fractions and lower values in the lower bed – up to 0.68 unit fractions. Similar results were obtained from 87 sidetracks. Drilling of wells and sidetracks is proposed in areas with no well stock. Despite the final stage and high degree of field development, the proposed strategy will support oil production levels, increase remaining recoverable reserves, increase the efficiency of reserve recovery and improve the economic performance of field development. The introduction of modern development technologies, approaches to the analysis and monitoring of development will increase the target value of the final recovery factor from 0.608 to 0.613 unit fractions, which, with a significant amount of in-place reserves, made it possible to increase the remaining recoverable reserves by 35%. The strategy will make it possible to achieve higher oil recovery rates. The approaches used to solve the tasks set in the study can be applied to the fields of the Volga region.

Published
2024
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50. System testing levels of Tatar language proficiency

Author

Yakupov R., Fathullova K., and Denmukhametova E.

Subjects
Language competences, The Tatar language, Language certification, Control system, Level training
Abstract

In recent years, a special attention is paid to the change of methodological approaches in teaching the Tatar language as the state language of the Republic of Tatarstan, the achievement of the performance that each student can acquire the language as a means of active communication. This is the relevance of this article. It represents a system of diagnosing the quality of training of students on levels A1, A2, B1, B2. It allows to control the communicative advancements of students according to the main types of speech activity. When preparing the test tasks on the Tatar language for different levels, we relied on the materials of international exams in foreign languages, the experience of teaching of the Tatar language to foreign audience. The present material was approbated by controlling the level advancement of the Tatar language course participants as well as in the diagnosing the level of the Tatar language proficiency of the Russian-speaking pupils in comprehensive secondary school. Introduction of the developed level test is aimed at improving the systems of language certification for the Tatar language and allows to conduct entrance and exit testing in compliance with international standards.

Published
2016

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