### INFORMATION TECHNOLOGIES AND SYSTEMS

COMPLEXITY AND EFFICIENCY OF INFORMATION NETWORKS
Ivan Yu. Paramonov , Vladimir A. Smagin

5

Efficiency-related features of information network are considered. The concept of efficiency is refined. Volume of information work carried out by a network is proposed for a numeric characteristic of the network efficiency. An important property of a network - interaction between its components is analyzed. A model is proposed for calculation of probability of executed work volume for simple and complex network structure. Information efficiency of a network is shown to increase considerably when the network complexity grows. Recommendations for practical use of the results are formulated.

11

A method is developed to derive the optimal solution to the multi-level optimization problem based on consideration of separate element reservation as an example. Genetic method of search for solution in manycolonies
modification is analyzed. The lines of further investigation of the genetic method for multi-level problems are described.

INVERSE Z-TRANSFORM IN IDENTIFICATION OF DISCRETE SYSTEMS WITH DELAY
Rais D. Akhmetsafin, Rimma Z. Akhmetsafina

15

An algorithm for current identification of discrete system with variable delay is proposed. The system under consideration is supposed to consist of ideal pulse element, zero-order extrapolator, and linear continuous component. The algorithm is employs assessment of the delay parameter for a grid function (the fractional part of the delay parameter value) in modified inverse Z-transform based on condition of zero value of continuous component transient in the delay point.

REDUCTION OF FEATURE DESCRIPTION DIMENSIONALITY IN THE PROBLEM OF OBJECT DETECTION IN IMAGES
Pavel Druzhkov

25

A modification of sliding-window algorithm for object detection based on feature selection with the use of decision trees ensemble is proposed. Reduction in detection time without a loss in quality is demonstrated by the example of digital simulation of HOG-features in the problem of pedestrian detection.

### DEVICES AND SYSTEMS OF AUTOMATIC CONTROL

AUTONOMOUS METHOD FOR ESTIMATION OF ORBITAL PARAMETERS AND SPACECRAFT ORIENTATION IN THE ABSENCE OF A PRIORI INFORMATION
Danilova Tamara V.

30

A method for estimation of orbit elements and spacecraft (SC) orientation parameters relative to a moving orbital coordinate system is proposed. The method is based on analysis of spacecraft axes hodograph formed with the use of astronomic measurements carried out with an optical-electronic device rigidly fixed on the SC body at known angles.

SELF-ROUTING OF SIGNALS IN ANALOG-TO-DIGITAL CONVERTER BASED ON NEURAL NETWORK
Anton I. Posyagin, Alexander A. Yuzhakov

38

Analog-to-digital converter based on neural network is considered. An algorithm of self-routing and a method of organization of individual analog-to-digital converter for each input signal are proposed.

UNIVERSAL MODULAR RECONFIGURABLE SYSTEM FOR REAL-TIME PROCESSING OF THERMAL AND MULTICHANNEL IMAGE
Harry E. Zhurov, Mikhail Yu. Tsivinsky

44

A reconfigurable system of universal functional modules designed for full cycle processing of signal from thermal and multichannel imagers is described. The system of modules may be treated as a set of macro pipeline elements.

METHODS OF SOUND PRESSURE AMPLIFICATION IN MONOMORPHIC PIEZOELECTRIC ELEMENTS
Valery M. Sharapov, Петрищев О. Н., Konstantin V. Bazilo, Zhanna V. Sotula, Alexander M. Prohorenkov

47

The effect of low-frequency oscillation in monomorphic piezoelectric elements is considered. Two methods of sound pressure amplification are proposed: separation of piezoelectric element electrodes, and employment of additional oscillatory circuit at the piezoelectric element input.

### OPTICAL AND OPTO-ELECTRONIC INSTRUMENTS AND SYSTEMS

ABERRATION PROPERTIES OF THIN LENS IN WIDE AND NARROW RAY BEAM
Vasilisa Ezhova, Zverev Victor Alexeevich, Timoshchuk Irina N.

51

The possibility is shown and conditions are formulated for both stigmatic and aplanatic correction of thirdorder aberrations in image formed by positive lens system. Relations are obtained which determine position of thin lens entrance pupil to avoid primary coma and astigmatism in the image.

SENSING SYSTEM OF LINEAR DISPLACEMENT CONVERTER
Nikolay V. Smirnov, Maria S. Lopatina, Sergey S. Mitrofanov

61

An algorithm is proposed to take readings from incremental optoelectronic linear displacement converter to be used in multi-coordinate machining tools. Results of experimental study are presented.

SHADOW IMAGE OF LINEAR GRATING AS A GEOMETRICAL MODEL OF SHEARING INTERFEROGRAM
Zatsepina Marina E., Kirillovsky Vladimir K.

66

A fundamental analogy between classical interferogram and system of shadow image isophotes obtained by Foucault knife-edge method is discussed.

PINHOLE EYEGLASSES
Fedorov Yury V., Fedorova Alexandra Yu.

69

Construction, principle of operation of pinhole glasses, as well as therapeutic and training effects of their application are described, several modifications of the glasses are considered.

### INSTRUMENT-MAKING TECHNOLOGY

COMBINED APPLICATION OF ADDITIVE TECHNOLOGIES AND VIRTUAL SIMULATION IN POLYMER MANUFACTURE PREPRODUCTION
Yablochnikov Yevgeny I., Alexander V. Pirogov, Andrey A. Gribovskiy

72

A typical process of mold design is analyzed with the use of virtual simulation systems. Advantages of combined application of additive technologies and virtual simulation systems are noted. The possibility to employ additive technologies in calculations performed with CAE-systems for data visualization and in mold manufacturing for plastics and metal powders.