Vol 24, No 4 (2016)

Modern technology is actively use the brain-computer interface (BCI). Human interaction with the environment through a communication with the electrical and chemical activity of the brain is one of the most important components of the next stage of scientific and technological development in the XXI century. In recent years there has been significant progress in tasks of recognition and classification of various types of motor imagery. At the moment, one of the main methods of control in BCI are the EEG correlates of imaginary movements. The aim of this study is to identify the localization of most significant EEG electrodes in task of pattern recognition the motor imagery of the dominant arm. Using the fewer EEG electrodes should lead to increase the efficiency and reduce the cost of the EEG-equipment.

Monitoring natural and industrial objects is one of the most actual scientific and practical problems. The article presents the developed methodology for monitoring of natural-technogenic objects with a closed automated system. A decomposition of the problem involves finding: optimal aggregation and analytical models of changes in the state, as well as models of the formation of the monitoring information. The GIS that includes a network of seismic stations is developed. The structural basis for a closed automated system monitoring software modules make finding relevant models of the state of natural and man-made objects, including models of formation of monitoring information. With its use of established significant (over 10%), improving the functioning and use of natural and man-made objects.

This paper presents the problem of optimal control of induction heating process of the metal billet to the next operation of pressure treatment in conditions involving both if the billet immediately after heating is sent to deforming equipment, and if the need to move to temperature stabilization stage, depending on the implemented mode "pressure-heat treatment" technology complex. Proposed formulation and the method of solution of the corresponding the problem of time-optimal control with two at the same time the requirements presented demands to the final temperature of heated billets condition responsible for both options in advance unknown organization modes induction heating installation. The results and their analysis for the investigated models of induction heating process are given.

The results of the carbonated mineral contents quantitative assessment in multicomponent rock samples using the internal corundum standard method are presented. The radiographic quantitative phase analysis was conducted during the study and measurement errors of individual components contents caused by mode of radiographic equipment operation, the conditions of samples preparation, the influence of isomorphic impurities and peculiarities of diffraction patterns interpretation were determined. The influence of studied minerals textural variabilities on the uncertainty in the determination of corundum indexes has been noted. The analytical lines of the studied minerals and standard for improving the quantitative determinations accuracy was chosen on the experimental basis.

One of the main tasks in electrical networks is the task of mode optimization and power loss reduction. For these purpose static capacitor batteries are used the power of which must be determined in each particular case. This paper discusses optimization of the operating mode of the radial design of the electrical network. The calculation method of the nonlinear programming produces power compensation devices, which are installed in the locations of load. The analysis of active and reactive power losses for transmission lines (PTL) and transformers is made.

Relevance of the work due to the demand of the wholesale electricity and capacity market participants on ways to build short-term forecasts of electricity consumption in order to improve the quality and accuracy of the predictive model. The method of approximation of electricity daily schedule using sinusoidal function of approximation separately for day and night cycles of electricity. The possibility of applying one of the known approximation techniques for smoothing the points of join two sine functions describing the cycles of day and night electricity. The proposed method is applicable to entities with a view to approximating historical data on power consumption, the selection of the coefficients of the approximating function - period and amplitude for the possibility of its extension to the interval up to 24 hours. Currently, there are many methods to build short-term forecasts based on statistical and factual, expert and multi-factor models, however, they are not always acceptable, since most of the consumers is not transmitting hourly data of power consumption, at the same time, energy sales company operates the system operator data (JSC System operator of the Unified energy system), which have a limited set of parameters. This method can be applied not only to energy sales company, but also an industrial enterprise, where day and night electricity cycles have distinct differences. In this case, it is necessary to choose the coefficients of the approximating function - the amplitude and frequency of the proposed method. To construct a computational model used analytical Rapidminer system. These results were obtained using historical data electricity LLC "Omsk Energy Retail Company", where a significant proportion - 75 % of the total electricity consumption business and 25 % individual customers.

On the basis use of additional required function and additional boundary conditions in an integral method of heat balance, the exact analytical decision of the nonstationary task of heat conduction for the infinite plate with a variable boundary condition of the first kind in time is received. Use of time-dependent additional required function is based on the heat conduction of the infinite speed of distribution of warmth described by the parabolic equation according to which temperature in any point of a plate begins to change right after the application of a boundary condition of the first kind on its surface. The additional boundary conditions used when obtaining the solution are found in such look that their execution by the required decision was equivalent to execution of a differential equation of boundary value problem in boundary points. It is shown that execution of the equation in boundary points, leads to its execution and in the considered area. Execution of integral of a heat balance, that is input differential equation, average within thickness of a plate, allows to consolidate the solution of a partial equation to integration of an ordinary differential equation of rather additional required function. Absence of need of integration of the input differential equation on space variable, being restricted only to execution of integral of a heat balance, allows to apply this method to the tasks including difficult differential equations (non-linear, with variable physical properties, etc.) which obtaining exact decisions by means of classical analytical methods isn't possible.

Optimal parameters of electron beam welding (EBW) of heat-resistant alloy of the Cr15Ni45Mo5W1Ti2Al1Nb3Pbrand with thickness of 4.5 mm made without lining technology were defined. The effect of the EBW mode on the formation of defects was studied.Propensity of Cr15Ni45Mo5W1Ti2Al1Nb3P alloy to the defects formation was investigated on the sample-simulatordivided into seven equal portions at welding speeds of 7mm/s and 11 mm/s. To evaluate the quality of welding, each of the samples was subjected to X-ray inspection, cutting and metallographic investigation with the definition of the parameters of welds, micro hardness and the defects presence. The obtained values of the welding parameters for a butt joint provide the required quality and the size of the weld.

The paper is devoted to the results of the application of repair technology of drill pipes by surfacing. The analysis of the requirements for the tool joints after a recovery is made. Modeling of the stress state by finite elements is produced, bench testing is analytically explained. It is established that the destruction of the test samples on recovery did not occur, which confirms the feasibility of the previously proposed technology. Obtained bench tests data were used to develop the guidance manual for steel drill pipes with welded locks after repair in terms of restoration tool joints by surfacing method.

The analysis of reasons for emergency destruction of light alloy drill pipes is given. During the examination the studied macro - and microstructure of damaged structural areas of the metal drill pipe and the chemical composition of the metal, characteristics of strength, ductility and hardness are defined. The conclusions on drill pipe quality were made. The main reasons of quick drill pipe wear during operation were named.

This paper desribes a plating process modeling using probability cellular automatic device. The modeling plating process ran on non-metal substrate with a previously created metal film. In this research one-dimensional cellular automatic device was used. The processes of dissolution, plating and diffusion were taken into consideration. Probabilities of elementary processes were calculated with the influence of electrical field. The relationships between time and number of plated ions for different voltages were obtained. When thickness of the film is less than minimal value the plating process of electrical settling does not take place.