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No 6 (2015)
5-9 294
Abstract
A general form of the equation excitation arbitrary irregular waveguide with an inhomogeneous anisotropic dielectric filling is formulated.
10-16 264
Abstract
The graph model for software requirements specification is proposed. Besides, there are possible actions of improving the quality characteristics of software requirements described. In total proposed model and actions represent a method of the quality improvement of the software requirement specification.
17-22 263
Abstract
The structure of universal assembly unit was described; the unit includes six or more planar positioners moving on one stator in the general workspace. The algorithm of non-collision displacements was proposed for the trajectory planning of simultaneous motion of several positioners; the algorithm is built on the analysis of trajectories, the configuration of forbidden zones and the priority rule, it is intended for implementation in the control system of assembly unit. The features and benefits of control system of servo-drives and precision motion systems which is realized using Ether-CAT technology were described.
23-29 242
Abstract
For approximation of a solving statistics multivariant distribution in the radar-tracking recognition device as a weight function is used evaluations of one-dimensional cuts analyzed denseness. The deriving technique of weight function estimation is reduced. The getting method of nonclassical orthogonal polynomials system on the set weight function is described. Analytical calculation results of recognition conditional probabilities are presented at use of the offered weight function for approximation of solving statistics multivariant distribution and results getting by means of statistical modelling.
30-35 236
Abstract
The work is deal with one new design of loop antenna in which the 4 linear polarizations can be achieved: vertical, horizontal and two oblique polarization with angle 45° to horizontal plane. The numerical simulation results are present in the work.
36-40 352
Abstract
Cavitation activity in non-homogeneous ultrasonic field have been studied. It has been shown that the character of temperature dependencies of cavitation activity is different for different points of the field. For example, cavitation activity at the surface of the radiator and at the liquid - gas surface decreases with temperature. There are points in the volume of the liquid where temperature dependencies are curves with maximum, i.e. it grows with temperature, achieves maximal value and then decreases.
41-47 358
Abstract
The block-diagram for transmission of the encrypted information in wireless sensor networks is presented. For the encryption algorithm based on the symmetric algorithmic diagram the chaotic systems and maps are used. The dynamic chaos based encryption algorithm features the advantages (higher level of defense of the information about the routing; better reliability and data carrying capacity) which extend the scope of the cryptographic problems solved. The hardware and the software are realized with an ultra wideband transmitter- receiver of the PPS-40A type. Installation of the software in microcontroller of the PPS-40A type transmitter-receiver is illustrated. The characteristics of the transmitter-receiver microcontroller code before and after the encryption function realization are given. The peculiarities in implementation of the hard- and software for the encryption algorithm are considered.
48-54 1317
Abstract
Developing a method of segmentation and compact multiscale representation of images based on the progressive backward clustering. The method provides an accurate segmentation, multiscale representation and compression of the segmented images, adaptation to a limitation on the time of segmentation.
55-60 271
Abstract
With the continuous development of information technologies the question of effective information security management is becoming increasingly important. This article describes step by step development of the security program that allows effectively manage information risk of the organization. The attention is drawn to the important organizational features that need to be considered when building safety documents for their quality implementation and update.
61-64 2446
Abstract
The formation technology by sol-gel based on acetic acid sols and the electrophysical characteristics examination results of the strontium tantalate thin films of 240 nm thick are represented.
65-71 298
Abstract
An algorithm to detect the main signs of fire for video surveillance systems, which allows the detection of smoke, open flames, and their combination on dynamic images is proposed. A distinctive feature of the algorithm is the use of motion estimation, as a common feature, as well as the application of the algorithm of common approaches in the processing of video sequences. A set of experimental results are presented in the paper.
72-77 1219
Abstract
The problem of estimation and compensation of the mathematical expectation of random perturbations that effect the controlling object is solving by modal control based on extended object’s model which estimates object’s state variables and the value of perturbations that effects object and therefore allows to compensate them. Experiments show that system estimates the value of mathematical expectation and compensates perturbations.
78-83 258
Abstract
The expressions for determination of the avalanche photodetectors noise factor are proposed. The silicon avalanche photodetectors noise factor depending on the supply voltage, ambient temperature, the power of registered optical radiation are measured.
84-89 240
Abstract
The results of the separation process of solid particle by size, shape and weight of due to vibration are shown. There are defined three possible states of the field of the dispersed solid particles in the mixture depending on the parameters of vibration exerted on the mixture: an area in which the compaction of the mixture, the area separating particles by size and weight, and the area of intense mixing mixture powders.
90-93 323
Abstract
Nanostructured porous silicon impregnated by solid state oxidants has been studied in order to provide the mechanical impulse for jet-propulsion microsystems. The system with jet-propulsion movement on a silicon chip has been used for impulse measurements. The estimated impulse value is in the range of 25-130 mN·s by using of carrying platform for Si chips.
94-99 261
Abstract
Summed up the experience of the development and implementation I&C of CCPP by the company «Interavtomatika» AG on various types of CCPP. For example, the I&C of 65 Mw CCPP Borisov (Belarus) CHP considered actual problems of modern I&C of CCPP, among which the first is the integration software of the various local PLC groups processing equipment and PLC unit in a unified system of unit management.
100-102 383
Abstract
ZnSe epitaxial films are grown on (111)- and (100)-oriented Si substrates with a porous buffer layer by the thermal evaporation of ZnSe compound. The crystal structure of the deposited films was controlled by X-ray diffraction. The morphology of the films was studied by high-resolution scanning electron microscopy. It was demonstrated the porous buffer layer provides improving the quality of the films compared with films deposited on the monolithic silicon.
103-106 1312
Abstract
With the method of directional solidification (vertical Bridgman method) single crystals CuIn7S11 are grown. Their composition, structure and electrical properties are determined. According to the transmission spectra in the fundamental absorption edge at 80 and 295 K the bandgap is determined. The researches of thermal expansion and calculation of thermodynamic parametres are held by the dilatometric method.


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ISSN 1729-7648 (Print)
ISSN 2708-0382 (Online)