Vol 12, No 4 (2011)

In this article the the authors analyze the possibility of application of genetic algorithms to cope with tasks of optimization on an example of a problem of estimation of the regional industrial efficiency. A calculation comparison on the linear model of the region, made by means of genetic and simplex methods, is presented, and a possibility of application of the genetic methods to the model, in which the demand is prescribed to be a logistic curve, is described.

The authors consider problems of increase of efficiency of a converter with pulse-width modulation and zero-voltage key switching for a satellite self-contained power-supply system.

Construction and optimization principle of design-regime parameters of non closed adaptive hydrostatic support with independent floating regulator of work fluid consumption in comparison with traditional hydrostatic supports with throttle control for guide bearing of knots of heavy metal-cutting engineering tools is described. Results of theoretical and experimental researches of load characteristics and construction parameters, by flexibility criteria, are presented.

The paper considers application of DEA-method and its modifications used for estimation of efficiency of functioning of organizational and technical systems of enterprises.

From a perspective of collective estimation principles, the authors worked out the technique of testing, for a hypothesis of identity of laws of distributions of random variables, based on nonparametric algorithms of pattern recognition. Results of its comparison with Smirnov and Pearson criterion are presented.

A method that allows, for the initial set of points on a uniform grid, to determine automatically an interpolant with the fewest parameters in the following set of functions: polynomials, exponential functions, sine, any linear combination of the above functions.

A method of spatio-temporal correction of video sequences, in tasks of stereo vision, is presented. The algorithm of motion estimation and creation of interpolation frames in video sequences is investigated. The algorithm of image registration for creation of stereo video sequences is presented. Results of interpolation methods testing and video sequences registration are introduced.

The article considers a problem of optimization of friction damper for blades of gas turbine engines. Based on this study and the results obtained by the other authors, the authors constructed an effective mathematical model, which makes it possible to design a friction damper with optimal parameters.

The authors present analysis of dynamics of snow cover of Siberian Federal District (SFD). Additionally, they present the theoretical basis of calculation of the index of snow cover based on the study of spectral reflectance and absorption characteristics of the snow. Therefore, the main objective of this research is to analyze the dynamics of snow cover of SFD in order to create a forecast model of snowmelt runoff of the Siberian rivers.

This paper presents a set of models for planning the development of automated control system of space systems. Particular attention is paid to improvement of reliability of automated control systems of space systems with respect to their clustered architecture organization.

The article describes the reasons of hydrocarbon contamination and types of pollutions: surface and subsurface. The theoretical fundamentals of the decontamination process with the use of liquid СО 2 are considered. The formulas of quantitative evaluation of hydrocarbon contamination are presented. The mechanism of hydrocarbon decontamination of the surface and pore throats with the help of thermal «shock» and the «gas wedge» is proposed, the efficiency of cleaning is considered. The formula for determination of the time of the decontamination process has been calculated. The equation of continuity of fuel blasting process from the open pores of metal has been derived.

The paper is devoted to development of liquid rocket engine of low thrust which expends propellants: strong hydrogen peroxide with kerosene. The paper includes technical description of the engine, the main engine parameters and results of hydraulic test.

In the article the author proves the requirement of association of light streams, from separate radiation sources, at thermal vacuum working off of SC and presents a theory of calculation of the streams summation scheme, for construction of optical system of the Sun simulator.

The authors offer a method for support of the desision to be made by a crew team to avoid the emergency when such situation occurs wile in flight, with the help of a probabilistic method.

The method of high-precision measurement of distance is suggested with the use of the modified Doppler effect.

The authors consider methods of accuracy increase of beam positioning under the magnetic fields action at electron beam welding.

All widely known methods of form composition of structural alloys in the cold state via poly-percussive drifting lead to occurrence of intolerable buckling and mounting tensions, which drastically affect the life duration of aircraft structures.

The technique, which allows to significantly reduce the costs of research have been completed. All the stages of evaluating the accuracy, quality and efficiency are described.

Aspects of control of devices of parallel kinematics are considered. The control system of stepper motors is created. The controller of stepper motors is improved, the program of control for bipolar and unipolar motors is developed.

The experimental technology of modification of anode oxide of aluminum by carbon nano-tubes is developed. The morphology of porous anode of aluminum oxide at the intermediate stage of formation of active nano-fiber material is considered.

Conditions of the synthesis of poly-methylmethacrylate nanoscale spherical particles with narrow distribution in the sizes dispersed in water have been investigated. The morphology of particles was analyzed with the help of a method of scanning electron microscopy (SEM).

The existing economic system, the current state of social sphere, caused by transition to market relations, and connected with it laws and tendencies of development of a social infrastructure, demand the revision of principles of estimation of efficiency of social investments.

The consequent system position of a system of organizational structural designing of organizational segregations of the modern Russian aviation-industrial complex –corporations, enterprises and divisions –in the general systems of the corresponding self-management is revealed in the article.

The sustained expansion of socio-economic growth ensures effective management of the regional economy, so the main point is to construct a system of criteria indicators on the nature of the controlling action pursued by federal, state and municipal governments.

Conceptual questions of economic policy of enterprises are considered. Requirements of economic policy are identified. Principles, ensuring the implementation of the identified requirements are formulated and systematized

The problem ofefficient allocationof scarce budgetfunds allocatedfor social developmentrequiresthe development of toolsthat woulddefinesocial infrastructure, investmentsthat will bemost suitable.