Vol 10, No 4 (2009)

The short history of creation and current state of problems in the field of satellite navigation is considered, systems GPS and GLONASS in particular are considered. The basic problems of development GLONASS are allocated and decisions of the marked problems are offered. The problem of designing of navigating receivers is considered. The basic ways of the decision are allocated at designing of the big integrated schemes and microprocessor modules of management by the receiver of satellite navigation. The structure and structure of the integrated microprocessor for management of the navigating receiver capable to conduct reception of signals in four systems is offered: GPS, Galoleo, Bejdou and GLONASS. The basic ways of development GLONASS in the light of globalisation of satellite navigation on a global scale are planned.

Special mathematical model, generalizing of classical model of the elasticity theory, is used for the analysis of directions of the deformations localization in samples from soil with different strengths. Numerical solution of the problems is carried out by means of iterative process, on each step of which the equations of the elasticity theory with initial stresses are solved on the basis of the finite-elements method.

Buckling problem of orthotropic plates with two free and two simply-supported edges loaded with pure in-plane bending moment is solved in this paper. Finite difference method is used for problem solving.

This paper proposes the modification of probabilistic genetic algorithm, which uses genetic operators, influencing not particular solutions, but the probabilities distribution of solution vector components. This paper also compares reliability and efficiency of the basic algorithm and proposed modification using the set of test functions and the bank credit portfolio formation problem.

An algorithm of right-hand side and Jacobian formation of differential equations of chemical kinetics is described. Numerical simulation of the cesium cycle in the upper atmosphere is conducted by means of the L-stable method of the second order of accuracy with the control accuracy. The results of the computation are presented.

P-spice simulation results of two zero-current switching quasi-resonant converters operation with parallel connection in closed loop controlled voltage regulator under frequency control are presented.

The model of the geoinformation Internet system intended for the analysis of the territory condition on the basis of a set of indicators is considered. The system is defined as the specialized web portal containing a collection of typified frame components for dynamic creation of web pages, with elements of presentation graphics, interactive tables and maps, with the possibility of construction of conditions estimations of territories in a semi-automatic mode.

In the paper the multiattributive methods of decision-making providing problem solving a choice of optimal structure of on-board system of a space crafts «Gonets-M» and «Glonas-M» at many criteria are presented. The algorithms realizing procedures of a multiattributive choice and the conceptual circuit of a decision support system on the basis of given methods are resulted.

The classification of methods of investment projects modeling, the comparative analysis of the given methods, advantages, lacks, directions of application are made in this case. On the basis of the developed calculation of enterprise net profit algorithm, the factors of efficiency of the investment project are displayed.

Finding an appropriate set of features is an essential problem in the design of a shape recognition system. This paper attempts to show that for recognition of objects with high shape variability such as handwritten characters and human faces it is preferable to use the modified artificial neural network to feed the system with processed images by novel scale-and rotation-invariant interest point detectors and descriptors and to rely on learning to extract the right set of features. Experiments have confirmed the usefulness of the modified artificial neural network in a real-world application.

The invariant system of processing of information based on square-law characterised non-linear processing has been synthesized. By calculating the parameters of such kind of system it is assumed that the readings of sub-carrier are interfered with the additive noise and weakly correlated with each other . Quantitative estimation of the operation of such kind of system is compared with the quantitative indicators of the classical system with amplitude modulation and with the characteristics of the invariant system based on extended synchronous detection.

A determination possibility of navigation parameters of an object (coordinates, speed and direction of movement, parameters of the frequency-time scale, spatial orientation) based on the results of radio navigation parameters measurement (signal delay, Doppler frequency shift, etc.) of NSV retransmitted signals is overlooked.

In our calculations we make use of the system of equations for turbulent boundary-layer pulses in projections onto the cylindrical coordinate axes. We have performed transformations and integration of equations in the presence of accepted assumptions on the flow core motion pattern and compared the theoretical results with the empirical data.

Streams of impurity atoms on each of sites 0

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