Abiev N.A.,Taraz State University |
Arvanitoyeorgos A.,University of Patras |
Nikonorov Y.G.,Russian Academy of Sciences |
Siasos P.,University of Patras
Differential Geometry and its Application | Year: 2014
We consider the asymptotic behavior of the normalized Ricci flow on generalized Wallach spaces that could be considered as a special planar dynamical system. All non-symmetric generalized Wallach spaces can be naturally parameterized by three positive numbers a1, a2, a3. Our interest is to determine the type of singularity of all singular points of the normalized Ricci flow on all such spaces. Our main result gives a qualitative answer for almost all points (a1, a2, a3) in the cube (0, 1/2]×(0, 1/2]×(0, 1/2]. © 2014 Elsevier B.V.
Suleymenov O.A.,Taraz State University
Tsvetnye Metally | Year: 2014
Substandard ore processing volume grows every year, which causes the necessity to increase the efficiency and productivity of finishing processes. Electric separation in corona discharge field, which consumes little electric energy, is one of efficient methods of bulk concentrates' finishing. Corona discharge intensity is increased significantly with pulsed voltage. This process was analyzed with various types of highvoltage pulsing. There is offered the mathematical description of process, based on the trellis function. The basic steps of particles' charging were defined. Overcharging of nonconductor and semiconductor particles drains to the precipitation electrode with different speeds. There was studied the effect of residual stress between pulses. According to this, the changes occur in the charging process. Semiconductors change the sign of the charge at sufficient duration of pause. Subsequently, semiconductors may have induction charge. Conductive particles reach their maximum much earlier. Graphic description of the process is offered. Residual stress significantly increases the speed of the particles discharge. Kinetics of electrification of weakly conductive particles is determined by calculation. The limit values of the charges in pulsating corona were obtained. A theoretical justification of ripple voltage parameters is offered. The particles charging process was organized under optimal conditions for efficiency. Experimental results on concentration of minerals mixture with similar electric properties are offered. Pulsed, pulsing and continuous voltages were applied. The researches were conducted in various modes. Electric separation with application of pulsating voltage was more effective. The analysis of pulsing mode of high-voltage power is offered. The possibility of significant increase of concentration efficiency of bulk concentrates is shown. © Designed by: "Ore and Metals" Publishing House, journal "Tsvetnye Metally", 2014.
Assankulov N.A.,Taraz State University
Bulgarian Journal of Agricultural Science | Year: 2011
The investigation resulted in the mathematical model of drying process and subsequent cooling of seeds in the drying-cooling unit in a system of nonlinear differential equations in ordinary and partial derivatives. The system of differential equations is reduced to a system of integral equations and transfer functions. An integral equation describes the distribution of temperature of drying agent in the office in time. The results are applied to the synthesis system to stabilize process parameters of heat treatment of seeds in the drying-cooling unit.
Asanov A.A.,Taraz State University |
Matniyazova G.K.,Taraz State University
Journal of Water Chemistry and Technology | Year: 2012
The article has studied several water-soluble polymers as flocculants under conditions of purifying natural turbid waters and suspensions of bentonite. A polymer containing carboxylic and amide groups turned out to be the most effective flocculant. We have investigated a relationship between the structure of polymers and their efficiency in the course of water-treatment processes. © 2012 Allerton Press, Inc.
Umirkhanov M.G.,Taraz State University
Earth's Cryosphere | Year: 2014
The results of model research of the effect of obstacle deepening on the ice involvement under the obstacle have been presented. The Froude number has been used for model calculations.
Bulekbayeva K.,Taraz State University |
Turalina M.,Taraz State University |
Orynbayeva U.,Taraz State University |
Brener A.M.,South Kazakhstan State University
Chemical Engineering Transactions | Year: 2016
Necessity to achieve a high degree of gas mixtures separation and removal of dust and aerosols at the lowest possible energy cost makes it reasonable to use active hydrodynamic regimes. Such devices include scrubbers with contrary swirling flows. Apparatuses with described principle of action proved to be highly effective in pilot tests, but science-based engineering method of their calculation has not yet developed sufficiently. The goals of the submitted work are: to establish the regularities both of particles separation from the gas-aerosol flows in apparatuses with active hydrodynamic regimes of the new design; to determine the optimal design and regime parameters of their work; to develop the methods for calculating the hydrodynamic characteristics, parameters of gas purifying from dust. The offered by authors design of the apparatus with active hydrodynamic regimes has passed the pilot tests in the system for collecting the dust generated during the phosphorites agglomeration process. © Copyright 2016, AIDIC Servizi S.r.l.
Shardarbek M.Sh.,Taraz State University |
Mahanbetalieva K.T.,Taraz State University
Izvestiya Vysshikh Uchebnykh Zavedenii, Seriya Teknologiya Tekstil'noi Promyshlennosti | Year: 2015
In this paper the power parameters of the arc of the conveyor belt of the cyclical movement of the flat rigid materials. The dependencies, allowing the carrier to find traction branches and the necessary power of the arc of the conveyor belt. Installed power required for the cyclic movement of the flat rigid materials arc of the radius conveyor belt bearing surface and the coefficient of friction. Recommendations for the design parameters of arc belt conveyors.
Koibakov S.,Taraz State University |
Meldebekova G.,Yonsei University |
Maliktaiuly M.,Taraz State University
15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015: New Innovations and Sustainability | Year: 2015
Experience in operation of water and drainage facilities in the northern and central Kazakhstan, Western Siberia, and others is explained. Regions where soils are predominantly light loam and sandy loam shows that the channel open reclamation and main channels undergo drift soil. As a result of this phenomenon channel capacity sharply decreases, and in some cases the channel is completely clogged. Annual cleaning of river beds channels by hand from the products of wind erosion or unproductive mechanisms, as is the case at present, leads to significant financial costs. The mathematical model of flow in a cavity of the channel wind flow at different flow rates, the wind and the varying degrees of entering the canal bed of sand-gravel material. This model can be used when assessing the degree of exposure drifts beds channels at the design stage and to predict the possible negative consequences.
Asanov A.A.,Taraz State University |
Matniyazova G.K.,Taraz State University
Journal of Water Chemistry and Technology | Year: 2013
The flocculation of natural turbid water with various concentrations of suspended solids in the presence of high-molecular polyelectrolyte flocculants different in location, density, quantity and charge of functional group in the macromolecule chain as well as in the presence of aluminum sulfate coagulant was studied. The interaction processes between flocculants and suspended solids in natural turbid water were shown to be identical but different from its interaction with low-molecular aluminum sulfate coagulant. © 2013 Allerton Press, Inc.
Suleimenov Z.T.,Taraz State University |
Sagyndykov A.A.,Taraz State University |
Kirgizbaev A.T.,Taraz State University
Glass and Ceramics (English translation of Steklo i Keramika) | Year: 2016
The compositions and technological parameters of ceramic articles for interior facing obtained using phosphoric slag, refractory and bentonite clays are presented. The chemical and mineralogical compositions of the clays and phosphoric slag are investigated and the technological parameters of production and the physical and mechanical properties of ceramic tiles are investigated. © 2016 Springer Science+Business Media New York