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Taraz, Kazakhstan

Assankulov N.A.,Taraz State University
Bulgarian Journal of Agricultural Science

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. Source

Umirkhanov M.G.,Taraz State University
Earth's Cryosphere

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. Source

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

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. Source

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. Source

Badanova A.K.,Almaty Technological University | Badanova R.R.,Taraz State University | Badanov K.I.,Taraz State University
American-Eurasian Journal of Sustainable Agriculture

In this work the researches are conducted on studying of superficial characteristics of cotton fiber, changes of cotton fiber after influence of various technological solutions. It is shown that sorption ability of fiber can be increased with change of a form of the internal channel of fiber. © 2014, American-Eurasian Network for Scientific Information publisher. Source

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