Kazakh National Technical University

Almaty, Kazakhstan

Kazakh National Technical University named after Kanysh Satpayev is a leading technical university in Kazakhstan . Wikipedia.

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Kopzhassaruly K.,Kazakh National Technical University
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences | Year: 2016

One of the current problems in the conduct of mining activities, especially in arrays of rock is a manmade seismicity, entailing not only disastrous techno-economic and environmental impacts of (man-made earthquakes, rock bursts, landslides, etc.). All this is a direct consequence of the change of the geodynamic regime of the geological environment under the influence of large-scale mining operations that clearly supported by the results of research on the example of Akbakai field and presents a great opportunity to study a wide range of geomechanical processes and reduce their risk. To ensure industrial and environmental safety development of mineral resources, the actual problem is obtaining reliable information about the state of the rock mass in the bowels. Without them it is impossible to identify the dominant factors which have a significant impact on geomechanical processes in the specific geological conditions.In this regard, the article presents the results of research on the study and management of geomechanical processes in aAkbakai mine using modern surveying instruments. © National Academy of Sciences of the Republic of Kazakhstan, 2016.

Aidarova S.,Kazakh National Technical University | Sharipova A.,Kazakh National Technical University | Sharipova A.,Max Planck Institute of Colloids and Interfaces | Kragel J.,Max Planck Institute of Colloids and Interfaces | Miller R.,Max Planck Institute of Colloids and Interfaces
Advances in Colloid and Interface Science | Year: 2014

Stabilization of emulsions by mixed polyelectrolyte/surfactant systems is a prominent example for the application in modern technologies. The formation of complexes between the polymers and the surfactants depends on the type of surfactant (ionic, non-ionic) and the mixing ratio. The surface activity (hydrophilic-lipophilic balance) of the resulting complexes is an important quantity for its efficiency in stabilizing emulsions. The interfacial adsorption properties observed at liquid/oil interfaces are more or less equivalent to those observed at the aqueous solution/air interface, however, the corresponding interfacial dilational and shear rheology parameters differ quite significantly. The interfacial properties are directly linked to bulk properties, which support the picture for the complex formation of polyelectrolyte/surfactant mixtures, which is the result of electrostatic and hydrophobic interactions. For long alkyl chain surfactants the interfacial behavior is strongly influenced by hydrophobic interactions while the complex formation with short chain surfactants is mainly governed by electrostatic interactions. © 2013 Elsevier B.V.

Kudaibergenov S.E.,Kazakh National Technical University | Kudaibergenov S.E.,Institute of Polymer Materials and Technology | Nuraje N.,Massachusetts Institute of Technology | Khutoryanskiy V.V.,University of Reading
Soft Matter | Year: 2012

This review describes the state-of the-art of nano-, micro- and macrogels, membranes, micro- and nanocapsules, as well as multilayered thin films exhibiting amphoteric character. The synthetic strategies and physicochemical properties of amphoteric materials are outlined in light of the stimuli-responsive behavior and their potential application in nanotechnology, biotechnology and medicine. This journal is © 2012 The Royal Society of Chemistry.

Baimenshina G.,Kazakh National Technical University
Journal of Physics: Conference Series | Year: 2015

In this paper the dynamics of a two-mode semiconductor laser model is considered. The dynamic evolution of a two -mode semiconductor laser can be described by nonlinear rate equations, which take in account the gain saturation. Changes in parameters of the system can lead to changes of the character of the solutions. Qualitative analysis of the system is used for investigating the typical bifurcations and allowed conditions for the existence of different types of mode oscillations in the system. The phase portraits of steady state solution of system are plotted using numerical methods. The competition phenomenon between modes is observed. © Published under licence by IOP Publishing Ltd.

Kudaikulova G.,Kazakh National Technical University
Journal of Physics: Conference Series | Year: 2015

Therheological properties of drilling muds were studied. It is shown that for receiving pseudo-plastic liquids with an indicator of nonlinearity of N<0.3 use of polymers with a high molecular weight or a combination of polymers to various influence on water structure is most expedient. © Published under licence by IOP Publishing Ltd.

Baibatsha A.B.,Kazakh National Technical University
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Year: 2014

For work materials used multispectral satellite imagery Landsat (7 channels), medium spatial resolution (14, 25-90 m) and a digital elevation model (data SRTM). For interpretation of satellite images and especially their infrared and thermal channels allocated buried paleovalleys pre-paleogene age. Their total length is 228 km. By manifestation of the content of remote sensing paleovalleys distinctly divided into two types, long ribbon-like read in materials and space survey highlights a network of small lakes. By the nature of the relationship established that the second type of river paleovalleys flogs first. On this basis, proposed to allocate two uneven river paleosystem. The most ancient paleovalleys first type can presumably be attributed to karst erosion, blurry chalk and carbon deposits foundation. Paleovalleys may include significant groundwater resources as drinking and industrial purposes. Also we can control the position paleovalleys zinc and bauxite mineralization area and alluvial deposits include uranium mineralization valleys infiltration type and placer gold. Direction paleovalleys choppy, but in general they have a north-east orientation, which is controlled by tectonic zones of the foundation. These zones are defined as the burial place themselves paleovalleys and position of karst cavities in areas interfacing with other structures orientation. The association of mineralization to the caverns in the beds paleovalleys could generally present conditions of formation of mineralization and carry it to the «Niagara» type. The term is obviously best reflects the mechanism of formation of these ores.

Algazy Z.,Kazakh National Technical University
Vibroengineering Procedia | Year: 2015

In this paper is studied a vibratory conveyor that is placed on an elastic base. Using the closed contours method it was determined the system that needs to be solved to obtain graphical representation for the generalized coordinates determining the position of the mechanical system elements. The shaking conveyor represents the chase hanged or supported to the fixed section. The chase commits oscillating motions hereupon the cargo which is in the chase, migrates concerning to the chase. The nature of the flow and its parameters are determined by the nature of the oscillating committed by the chase. Justifying the dynamic parameters of the shaking conveyor and a study of the stress-strain state. Installation causes fluctuations fixed tray. Uniformly distributed load on the tray acts in each element of the mechanism. A proper dynamic model has been developed within MSC ADAMS software. Simulation tests have been carried out and results are discussed to validate the proposed design solution. © JVE International Ltd.

Baimensina G.,Kazakh National Technical University
Journal of Physics: Conference Series | Year: 2014

In this paper we study the dynamics of a semiconductor laser with optical injection. The time behaviour of solutions of a system of three coupled nonlinear rate equations, describing the electric field amplitude and the carrier concentration and the phase difference within the resonator, is discussed both qualitatively and numerically. We then concentrate on the periodic orbits that emanate from Hopf bifurcations. Depending on the injection strength and the phase difference two types of oscillations can be found, such as relaxation and periodic oscillations © Published under licence by IOP Publishing Ltd.

Ivanov K.S.,Kazakh National Technical University
WCE 2010 - World Congress on Engineering 2010 | Year: 2010

It is proved: kinematic chain with two degrees of freedom containing the closed loop and only one input link is definable. The proof is carried out on basis of statics lows. The closed loop imposes additional constraint on the kinematic chain and transforms it in mechanism with one input. Such mechanism has the property of force adaptation to variable technological loading. Gear adaptive transfer in form closed gear differential contains input carrier, closed loop and output carrier. At constant input power the output carrier possesses an angular speed which inverse to a torque. Such gear adaptive transfer has constant engagement of tooth wheels and provides variable transfer ratio (as variator) without any control. Laws of interrelation of force and kinematic parameters are resulted. Assembly drawing of adaptive gear transfer is presented. The developed transfer permits creation of adaptive transfer boxes of cars, drilling rigs, manipulators, rudder air scoops and others.

Abdrakhmanova K.K.,Kazakh National Technical University
IOP Conference Series: Materials Science and Engineering | Year: 2015

The work contains the results of a nano-structural modification of sulfur that prevents polymorphic transformations from influencing the properties of sulfur composites where sulfur is present in a thermodynamic stable condition that precludes destruction when operated. It has been established that the properties of sulfur-based composite materials can be significantly improved by modifying sulfur and structuring sulfur binder by nano-dispersed fiber particles and ultra-dispersed state filler. The paper shows the possibility of modifying Tengiz sulfur by its fragmenting which ensures that the structured sulfur is structurally changed and stabilized through reinforcement by ultra-dispersed fiber particles allowing the phase contact area to be multiplied. Interaction between nano-dispersed fibers of chrysotile asbestos and sulfur ensures the implementation of the mechanical properties of chrysotile asbestos tubes in reinforced composite and its integrity provided that the surface of chrysotile asbestos tubes are highly moistened with molten sulfur and there is high adhesion between the tubes and the matrix that, in addition to sulfur, contains limestone microparticles. Ability to apply materials in severe operation conditions and possibility of exposure in both aggressive medium and mechanical loads makes produced sulfur composites required by the road construction industry. © Published under licence by IOP Publishing Ltd.

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