INFORMATION TECHNOLOGIES AND SYSTEMS
SENSITIVITY OF A PRIORY LOGICAL PROBABILITY CONCLUSION IN INTELLECTUAL INFORMATIONAL SYSTEMS
Tulupyev Aleksander L
3
A method is proposed for estimation of the effect of initial data variation on an a priory conclusion in a fragment of algebraic Bayes net. The method is based on solution of a set of linear programming problems. An upper estimate is derived for conclusion sensitivity depending linearly on initial data variation radius.
TECHNOLOGY OF ERGONOMIC PROVISION IN DESIGN OF AUTOMATED WORKPLACE OF
INTEGRATED AUTOMATED CONTROL SYSTEM
Alekseev Sergey A.
6
Application of ergonomic principles to design of automated workplace (AWP) as a component of an integrated automated control system is considered for the case when the AWP users have a humanitarian education.
APPLICATION OF PARAMETRICAL APPROXIMATION FOR CONSTRUCTION OF PLANNED
TRAJECTORIES OF MOBILE APPARATUS
Georgiy M. Dovgobrod, Клячко Л. М., Andrey V. Rogozhnikov
11
Parametric polynomial curves of the fifth (or higher) degree are proposed for construction of planned trajectories of mobile apparatus. The planned trajectories are shown to possess the maximal possible curvature radius with starting and final points having given coordinates, directions, and curvatures. The proposed trajectories may be used as reference curves when automated or manual control over the apparatus motion is applied.
18
The problem of optimization of navigational measurements program on board of a space vehicle is considered. A method is proposed to solve the problem on the basis of the known Rozenbrok computing scheme. The method includes a procedure of random search for detailed analysis of a neighborhood of a point of supposed extremum. Computed results are presented for various values of a space vehicle orbit eccentricity and navigational parameters: two angles “a star — horizon of the Earth” and angular diameter of the Earth.
ANALYSIS OF A MODEL OF VISION SYSTEM CELLS ON THE BASE OF THE MINIMUM REPRESENTATION LENGTH PRINCIPLE FOR IMAGE DESCRIPTION
Potapov Alexey Sergeevich, Gurov Igor P, Anton Averkin
25
Theoretical analysis of an informational model of visual cortex cell selective to spatial patterns is carried out. Methods of textural segmentation based on accepted model are demonstrated to diminish representation length of image description. Explicit application of image description length as an objective function is shown to allow for the model improvement.
AUTOMATED FILTRATION METHOD FOR SPAM CONTROL
Maria А. Semenova, Veniamin Semyonov
32
A method for control over undesirable electronic correspondence distributed via the Internet is proposed. The method is based on automated filtration of electronic messages with the use of Bayes theory.
DEVICES AND SYSTEMS OF AUTOMATIC CONTROL
THE PROBLEM OF INTERVAL CROSS-COMMUNICATIONS IN DYNAMIC SYSTEMS OF THE “2D INPUT — OUTPUT” CLASS WITH QUASI-SIMILAR CHANNELS
Evgeny D. Likholetov, Ushakov Anatoly Vladimirovich, Artyom Tsventarny
35
The problem of secure operability of dynamic system with quasi-similar channels is analyzed on the base of dependence between the stability factor of separate channel and argument of cross-channel links matrix. Solution to the problem is obtained with an estimate of channel dissimilarity degree as a parameter.
LIMITING CONTINUOUS MODEL OF SYSTEM WITH HIGH-FREQUENCY STRUCTURE VARIATION
Anatoly I. Korshunov
42
For system with periodical structure variation, a limiting model is derived in the form of a vector – matrix differential equation. The model describes the system limit when period of the structure variation tends to zero. The model is applied to examine a pulsed dc step-up transformer. Mathematical modeling is used to estimate the proximity of continuous limiting model to actual alternating structure system.
ELECTRONIC AND ELECTROMAGNETIC DEVICES
DISCREET FILTERING ALGORITHM WITH INTERMEDIATE SMOOTHING OF INPUT SIGNAL COUNTS
Sergey I. Ziatdinov
49
A discreet filtering algorithm with intermediate summation of input signal counts is proposed. Comparison of accuracy characteristics and computation effectiveness of the new algorithm with known algorithms is presented.
A DIGITAL PHASE LOCK LOOP WITH CLOCK PERIOD INTERPOLATION
Valery A. Chulkov
53
Digital phase-synchronization systems with clock period interpolation effected by implementation of local generator operated in multiphase ring circuit and application of phase interpolation elements are considered. Diagrams of controllable delay element – ring generator unit – and phase interpolation element are presented. Principles of design of phase-synchronized interpolation devices with relay and sawtooth characteristics of phase comparison circuit are described.
PROTECTION OF STRIP POWER AMPLIFIERS AGAINST OVERLOADS AND AMPLITUDE MODULATION OF HIGH-POWER SIGNALS
Alexander A. Titov
58
Bipolar transistor is shown to constitute a controllable clipper of high-power signals with the range of about 40 dB. Possible applications of bipolar transistors in overload-protection devices for strip power amplifiers as well as in modulators of high-power signal amplitude are described.
OPTICAL AND OPTO-ELECTRONIC INSTRUMENTS AND SYSTEMS
VALUATION OF ADEQUACY FOR COMPUTER MODEL OF OPTO-ELECTRONIC SYSTEM
Irina P. Torshina, Yury G. Yakushenkov
63
Some methods of adequacy valuation for computer model of opto-electronic system are considered. A procedure of computer model optimization with the use of the adequacy criterion is described.
IMPROVEMENT OF ACCURACY OF RECIRCULATION RANGEFINDER BASED
Vladimir L. Kozlov
68
Accuracy of precise laser rangefinders employing a two-wavelength diode laser is considered. Information on speed of wave propagation along the trace is obtained in optoelectronic recirculation mode at the two wavelengths and is used for range calculation.
INSTRUMENT-MAKING TECHNOLOGY
REDUCTION IN SURFACE ROUGHNESS OF A GLASS CERAMIC SUBSTRATE TO NANOMETER SIZE
Valery V. Besogonov, Скворцова И. Н.
73
Variation of surface roughness of standard glassceramics ST-50-1 substrate under the action of CO2 laser radiation is investigated. Operation conditions affording surface peaks size reduction down to 20 nm. Further reduction in the roughness is shown to be achievable to allow for formation of surface nanostructures. The problem of temporal stability of resulting surface characteristics is discussed. Control over topology of the surface being worked is performed with scanning sounding microscope Solver P47 Pro.
ESTIMATION OF OPTIMAL INSPECTION INTERVAL FOR ELECTRICAL MACHINERY DIAGNOSTICS
Vladimir V. Karagodin, Evgeny P. Vishnyakov
76
The problem of diagnostic of electrical equipment of power supply systems is considered. A method to estimate the optimal inspection interval is proposed. The procedure can be carried out in the course of the powery supply systems operation.
NEW EDUCATIONAL TECHNOLOGIES
METROLOGICAL APPROACH TO THE CONCEPT OF SPECIALIST PROFESSIONAL COMPETENCE
Svetlana A. Boyashova
82
Systematic and metrological approaches to the concept of professional competence of a specialist are considered. The concept is applied for development of measurement methodology in automated testing system aimed at estimation of training level of a specialist.
