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The following topics are dealt with: radio engineering; telecommunication system; computer science; information processing; electronics system; infocommunication systems; and radioelectronics.
Conception of special digital information transmission systems (SDITS) creation and results of decision of Ukraine actual scientifically-applied problem of domestic connection apparatus development is presented on the basis of xDSL technologies for the existent wired communication channels. The example of specialized information system development for UMIA is presented in thesis.
The process of radar signals recognition is mainly based on deinterleaving process of signal time parameters. Signal spectrum recently has became a very distinctive radar signal feature. Within this subject frequency modulation on pulse (FMOP) is a very good descriptor of signal. The most popular and obvious method is application of digitising technique and specialized software performing fast Fourier...
There is considered the methodology of constructing the microwave radar systems for 24 -hour and all-weather remote monitoring with information possibilities not yielding to the optical ones. The analysis of the achieved technical characteristics has been made, and the main ways for further improvement of the microwave imaging systems have been defined.
In this paper some results of measurements of the dc characteristics of the power MOSFET IRF840 are presented. These characteristics were measured for ideal and real cooling conditions. The influence of selfheating on the output and transfer characteristics of the investigated device are shown and discussed.
In this article the methods of calculation and increasing of optical transport systems efficiency are examined with the use of system analysis elements in the sphere of new generation infocommunicational decisions development for a national informative infrastructure.
Some problems of designing of sensors with sensitiveness thresholds 1??10-3 nT??Hz-1/2 - 1??10-6 nT??Hz-1/2 in the 1 Hz-1 kHz frequency range are considered. Parameters and technical characteristics of the modern induction sensors, that are intended for measuring weak magnetic fields are analysed in the report.
The paper suggests new modifications of Gauss and Gramm-Schmidt methods for recurrent parameter estimation of sequentially complicated structures of regression models when modeling from data. The results of run time comparison of these algorithms with a recurrent algorithm based on the known bordering method are presented.
The method of tolerance ellipsoidal estimation on the basis of method of the guaranteed estimation of parameters set of "input-output" models is offered.
An actuality of modeling of cognitive processes for bio-technical systems. The basic lacks of traditional chart of preparation of specialists are described. The system of the adaptive trainings for upgrading receipt of professional skills and control the system training is offered, oriented to the increase of the productivity of process of studies.
The problem about definition of mechanical deformations is viewed at dynamic twisting with bend of rectangular cross-section piezoceramic rod. The method of analytical definition of piezoelectric constants matrix of the polarized piezoelectric ceramics is offered. The boundary problem of electro elasticity for a case of dynamic twisting is formulated and system functions of piezoceramic rod deflector...
An analysis of a correlation processing and wide-band detection of the inductive response signal of the parametric fluxgate magnetic field sensor based on dielectric magnetic core is carried out. It is shown that correlation processing allows increasing of sensitivity and signal-to-noise ratio of fluxgate transducer.
This work the mathematical model of transistor equivalent of electrical controlled capacity based on two bipolar transistors are made. Associations of active and reactive component complete resistance with changeable temperature.
Constants of Stanford University Interim (SUI) model at which real attenuation of a signal in the environment is equal to calculated losses of radio waves distribution (RWD) are designed.
Is the increased effectiveness of symbol analysis of linear parametric circles in Matlab environment by calculating the determinants through d-trees method. It is shown that the use of Fourier exponential series has some advantages over Fourier trigonometric series. The conclusion is drawn on the basis of the given experiments.
In this work it is executed research of influencing of noises on determination of nonstationary time error in the measuring channels on the basis of analysis of statistics.
In this article the procedures of construction of macromodels of the difficult dynamic systems are examined. For construction of macromodel optimization is used. For illustration of method two examples of design of economic processes are resulted.
A criterion of test a hypothesis of a polynomial regression order is substantiated, in it the resultant statistics is formed by using two designs. The first supposes an independent variable to take a set of equidistant points and the second design is optimal. As a criterion of the design optimality the minimum of a sum of quadrates deviations of the regression function estimate from it truly values...
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