Experimental research and the numerical simulation of the non-standard pump for the flow-circulation type reactor

The paper shows the results of the experimental measurements and the numerical simulation of the flow-circulation type reactor pump main characteristics. The mathematical model based on Navier-Stokes equations and standard k-epsilon turbulence model was used for the pump CFD simulation. The pump power consumption was calculated by the proposed CFD post-processing method. It is found that the simulation error of the proposed method is not more than 2.9%. The obtained results include the regression equations of the pump full pressure, the pump feed and the power consumption at the pump cross-points. © 2019 IOP Publishing Ltd. All rights reserved

ИНФОРМАЦИОННАЯ СИСТЕМА АВТОМАТИЗАЦИИ ПОДГОТОВКИ ДОКУМЕНТОВ УЧЕБНОГО ПРОЦЕССА

Information technology is rapidly conquering the world, permeating all spheres of human activity. Education is not an exception. An important direction of information of education is the development of university management systems. Modern information systems improve and facilitate the management of all types of activities of the institution. The purpose of this paper is development of system, which allows automating process of formation of accounting documents. The article describes the problem of preparation of the educational process documents. Decided to project and create the information system in Microsoft Access environment. The result is four types of reports obtained by using the developed system. The use of this system now allows you to automate the process and reduce the effort required to prepare accounting documents. All reports was implement in Microsoft Excel software product and can be used for further analysis and processing.Информационные технологии стремительно покоряют мир, проникая во все сферы человеческой деятельности. Образование не стало исключением. Важным направлением информатизации образования является развитие систем университетского менеджмента. Современные информационные системы улучшают и облегчают управление всеми видами деятельности учреждения. Целью предлагаемой работы является разработка системы, позволяющей автоматизировать процесс формирования отчетных документов. В статье описывается проблема подготовки документов учебного процесса. Было принято решение о проектировании и создании информационной системы в среде Microsoft Access. В качестве результата показаны 4 типа отчетов, полученные при использовании разрабатываемой системы. Применение данной системы уже сейчас позволяет автоматизировать процесс и сократить трудозатраты на подготовку отчетных документов. Все отчеты реализуются в программном продукте Microsoft Exсel и могут быть использованы для дальнейшего анализа и обработки

RESEARCH OF THE HYDRODYNAMIC OPERATION MODES OF A HIGH-SPEED SEDIMENTATION CENTRIFUGE

Two hydrodynamic regimes of high-speed sedimentation centrifuge were found. Laminar one is characterized by sedimentation of a solid phase and a liquid phase infinite mixing path. Turbulent is characterized by axial and radial pulsations of a liquid phase and decreasing of sedimentation efficiency

Mathematical model of denamic deformation of compacted elastic viscous plastic medium

The article is devoted to research of dynamic deformation of soil sealing process environment. An original approach to the modeling of the process. Sealing medium is regarded as elasticviscoelastic body, a deformable external periodic force. As the elements characterizing the rheological properties of such a medium, selected elements before it: Gooke, Newton and Saint-Venant. The model allows us to investigate the stress-strain state of the environment in the process of deformation of the entire thickness of up-lotnyaemogo layer. Implementation of the proposed modeling approach allows the rose-Sit seal the energy efficiency of the process, select the modes of rational flow of the process and the parameters of the compactor

INFORMATION SYSTEM OF AUTOMATION OF PREPARATION EDUCATIONAL PROCESS DOCUMENTS

Information technology is rapidly conquering the world, permeating all spheres of human activity. Education is not an exception. An important direction of information of education is the development of university management systems. Modern information systems improve and facilitate the management of all types of activities of the institution. The purpose of this paper is development of system, which allows automating process of formation of accounting documents. The article describes the problem of preparation of the educational process documents. Decided to project and create the information system in Microsoft Access environment. The result is four types of reports obtained by using the developed system. The use of this system now allows you to automate the process and reduce the effort required to prepare accounting documents. All reports was implement in Microsoft Excel software product and can be used for further analysis and processing

Development of modification technology of wood raw material in production of solid biofuel

Studies have shown that the mechanical properties of the pellets produced from hardwoods yield pellets traditionally used pine. In order to improve their original wood raw material modified by the addition of protein nature (albumin, casein , gelatin) and starch (potato starch and maize, starch syrup) by spraying through nozzles in the screw feeder directly before granulation. To increase the strength of pellets application proteinaceous adhesives has proved more effective than the starch paste. Albumin as presented in this particular interest. To carry out industrial testing technology was developed modifications of chopped wood with its use in the production of pellets. The tests samples of modified wood pellets showed full compliance with them as a group 1 (in STB 2027). Humidity pellets was 10%, ash content – 0.7%, the wood dust abrasion – 0.8%; calorific value – 17,640 kJ/kg

METHOD OF JUSTIFICATION OF OPERATIONAL PARAMETERS OF VIBRATING ROLLERS FOR COMPACTION

This article investigated the frequency of the oscillation exciter during compaction of soil embankments recommended for vibratory rollers «Raskat». The technique justification regime parameters of vibrating rollers for soil compaction. A program to automate the process of the operation mode for a particular model of vibratory roller with compaction of different soil types. The research will improve the performance and efficiency of the use of vibratory rollers for soil compaction

Restoration of the Genus <i>Paraunisaccoides</i> Martin, 1973 (Digenea: Haploporidae) and Description of <i>P. elegans</i> n. sp. and <i>Unisaccus halongi</i> n. sp. from Mugilid Fish in Vietnam

We restore the genus Paraunisaccoides (Haploporidae), synonymised earlier with the genus Skrjabinolecithum. Adult worms, detected in Vietnamese mullet fish, were highly similar to trematodes described as P. lobolecithum via digestive and genital system structures and relative organ arrangement. Differences are expressed as absence and presence of pads on the hermaphrodite duct, respectively, and the disjunction of some metric parameter values, namely body, ovary and eggs. Ribosomal DNA sequences, based on the phylogenetic analysis of Haploporidae, indicates that new worms represent a sister clade to Unisaccus tonkini. Genetic divergence between new worms and Skrjabinolecithum species can be interpreted as intergeneric. Based on morphological and molecular data, we recognise Paraunisaccoides as a valid genus within Waretrematinae and worms from Vietnam as a new species of this genus, P. elegans n. sp. Other worms detected in Vietnamese mugilids are morphologically similar to representatives of Paraunisaccoides и Skrjabinolecithum. However, molecular-based phylogenetic analysis showed that these trematodes are closely related to Unisaccus tonkini; the genetic divergence between them is at the interspecific level, despite considerable differences in vitellarium structure as intergeneric character. Accepting the priority of molecular results, we include these new worms into the genus Unisaccus as new species, Unisaccus halongi n. sp