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Represented by a mathematical model of the growth of multi-layer coating on the surface of the part cylindrical shape during the deposition of plasma, taking into account the various transport mechanisms and stages of chemical reactions in the coating. Calculate the concentration of deposited chemical elements and their compounds in the coating, the stresses and deformation.
The modification of power supply circuit used for pumping metal vapor laser is analyzed. The results of OrCAD simulation of the processes that occur in the power supply operating at different operation modes are presented. The effect of the capacitance ratio on the storage capacitor charging process is described. The mode which provides more time for the recovery of the thyratron is discussed.
Mineral recources mining can cause a number of problems, which are fully described and prognosed in the article. The problems consist in the weak base, existing in the slopes, that can lead to the bedding of the slope base. There are two possible methods of calculating of the parametres that can prevent such problem as bedding. These methods are numerical and analytical. The more detailed explanation...
The paper presents the study of magnetic losses in rotor of permanent magnet multipolar synchronous machine with fractional-slot winding of stator. Study of magnetic losses was conducted using three-dimensional finite-element models of electric machine magnetic field. The results allowed revealing the factors the most influencing the loss rates, as well as estimating the ways to decrease magnetic...
The paper considers approach for creation of 3DS Studio Max room scene from a set of 2D images. Considered approach is based on Canny's algorithm of edge detection. Recommendations for perspective settings adjustment and animation rendering are given.
In this work the mathematical equations describing change of pressure in the pipeline are presented. Transitional characteristics of settlement pressure in a pipe are shown at various coordinates of leak. Use of artificial intelligence methods, such as expert systems and neural networks for determination of leak coordinate from the oil pipeline is specified. The neural network by means of the GUI...
The main current directions of research in nanoscale images processing of a high degree of detail are shown in the paper. A system of algorithms for solving a wide range of tasks for the structural analysis of the images of industrial materials has been developed. The experimental results of the developed algorithms have been presented in the article. The results of the image processing of industrial...
In this work the vibration-based diagnostics method of the state of rolling element bearing on the basis of the theory of active perception is considered. The experimental researches of the method are conducted according to the data presented by Case Western Reserve University Bearing Data Center. According to the research, it is possible to conclude that the proposed method provides a high precision...
This paper proposes an application of calculation method of time-frequency correlation function to problems of pipeline leak detection and localization. Presented method avoids iterative procedures of detecting informative frequency range. The results of the study demonstrate better accuracy in leak localization as compared with other approaches by obtaining additional data on the signal and improving...
General growth in raw hydrocarbons requirement and ever-increasing degree of resources development on the continents have caused dramatic exploration activation in World's water areas. The article describes the current situation of oil and gas offshore drilling and production, considering the effect of climatic conditions on the drilling process.
The issues of the development of adaptive pulsearc welding methods for construction and repair of the main pipelines are considered in this work. Welding methods are developed on the basis of examination of melting kinetics and transfer of some electrode metal. These methods allow ensuring a defect-free formation of root, filling and facing seams of welding combination in different space positions.
This article considers positive and negative vibration influences, occurring at drilling machine operation. The examples of vibration protection are given. The example of the economical load at drilling as well as types of drilling is demonstrated.
This investigation is aimed at comparing the properties of the powders obtained by the methods of electric explosion of wires (EEW) and electric spark-dispersion of metal granules in water. Differences in the samples' properties caused by the physicochemical characteristics of the production processes are determined in the paper. It is shown that the electric explosion of aluminum wires in a mixture...
Currently, the deviating hole drilling occupies a leading role in Russia. Directional drilling is used when the wells for oil and gas in Western Siberia, in the north of the European part, in the North Caucasus, in Tatarstan, Bashkortostan, Samara region and other areas are drilled, as our regions have a vast number of factors interfering with conventional drilling.
In the article the techniques directed to improve calculation of time-frequency correlation functions is considered. It was experimentally shown that the parallel computation of time-frequency correlation function, together with the use of the mechanism of recursion and architectural optimization technique allows using CPU more efficient.
The article deals with the problem of the synthesis of multi loop control system. Modern methods of the synthesis of multi loop control systems do not provide the control with prescribed accuracy. This paper presents a new method that provides the desired quality of the synthesized system.
An analytical method for constructing a plastic zone during the sliding of a smooth circular cylinder on the rigid-plastic half-space is proposed under plane strain conditions. The method is based on an approximation of the slip lines by circular arcs. The results are used as an initial approximation for determining the radius of curvature of the slip lines and the velocity field into the plastic...
In order to automate train traffic control, the problem of routes finding has been investigated. At large stations the number of all possible routes is high and the amount of computation is largewhen searchingforit. To reduce thisamountthe method of division of stationshas been proposed. Then the problem of finding the places of cuts of the network graph, taking into account the traffic rules, hasbeen...
This article shows the development and research of the functional model of the queueing system based on priorities. The model has been created in the environment of MATLAB Simulink. The queueing systems with the use of various disciplines of expectation and service are shown. On the basis of the conducted researches the assessment of the operating capability of the considered systems has been carried...
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