Category Archives: Issue # 4(11)

MODELLING OF DISPERSION OF ELECTROMAGNETIC WAVES IN AN INHOMOGENEOUS MAGNETO-DIELECTRIC BODIES

UDC 621.396

A.A. Maximova

In this paper, the analysis in the time domain based integral equation approach. The approach is considered for describing of transient processes in composite metal-dielectric bodies is given. Numerical examples are given to demonstrate the stability and precision of the proposed method. As the object of analysis is a metal cylinder.

Keywords: modeling, scattering on magneto-dielectric body, diffraction.

Full text:
Maksimova_4_15_2.pdf

THE METHODS OF OPERATION OF THE ELECTROMAGNETIC ENVIRONMENT INDOOR

UDC 621.396

A.P. Preobrazhensky

In this paper we discuss the issues related to the propagation of electromagnetic waves inside buildings. The basic types of reflectors are corner reflectors, reflectors that affect the scattered signals. List the types of screens, for which at the moment can be made a reasonable estimate of the scattered fields.

Keywords: wave propagation, room, environment, screen.

Full text:
Preobrazhenskiy_4_15_1.pdf

THE MAIN TRENDS IN THE DEVELOPMENT OF TECHNOLOGIES OF INFORMATION EXCHANGE

UDC 681.3

E.S. Zatsepin

In this paper the analysis of peculiarities of development trend of computer technology is given. It was shown how to provide virtually unlimited bandwidth of routing protocols that can be used in wireless networks. Continuously growing number of professionals working from a PC which is becoming their main working tool. The characteristic feature of the new generation computers connected to the introduction of artificial intelligence and natural language communication are considered.

Keywords: information technology, wireless network, protocol, characteristics, efficiency, computing.

Full text:
Zatsepin_4_15_1.pdf

INVESTIGATION OF THE ABSORPTION OF ELEKTROMAGNITNOGO FIELD OF BIOLOGICAL MATERIAL ON THE EXAMPLE OF THE 2-DIMENSIONAL CASE

UDC 681.3

A.A.Maximova

In this paper the study of new schematic models, which can be useful in the evaluation of induced fields in biological objects is given. The case of incident plane electromagnetic wave is considering. for the 2-dimensional case. In these models the description of induced fields in a lossy medium is given, by applying theory of transmission lines. Voltages and currents in circuits models simulate the electrical and magnetic field environments. The solution involves the presentation of equivalent conductance and current sources of polarization in the medium. Such currents are treated as sources of excitation in the contours of the patterns which dictate the condition of the induced field.

Keywords: propagation of electromagnetic waves, biological tissues, scattering, polarization.

Full text:
Maksimova_4_15_1.pdf

PROSPECTS OF DEVELOPMENT OF MODERN INFORMATION PROCESSING SYSTEMS

UDC 681.3

A.A. Aksenova

In the paper there is a discussion of modern perspectives of development of computer technology. It is noted that the main trend in the expansion of computer technology, the existing conditions can be considered as a subsequent increase in the areas of their use. The main components are described that make up intelligent systems.

Keywords: information, channel, process, model, system, element, computer.

Full text:
Aksenova_4_15_1.pdf

FORMATION OF CONTROL PULSE BRUSHLESS DIRECT CURRENT MOTOR IN STARTING MODE

UDC 330.59:007

M.B.Guzairov, B.G.Ilyasov, E.A.Makarova, E.S.Zakieva

There are considered the problems of analysis of the population housing conditions quality as one of the most important characteristics of life quality on the basis of principal components. The built principal components were analyzed and there were defined the clusters for three sets of indexes charactering various aspects of the quality of population housing conditions in Russian regions.

Keywords: housing quality, the principal components method, significant attributes, clusters of regions.

Full text:
GuzairovSoavtori_4_15_1.pdf

USING DECISION TREES FOR PROCESS MODELING ASSESSMENT OF PATIENTS WITH OPERATED ACQUIRED HEART DISEASE

UDC 681.3

A.S. Trukhachev

The article discusses the development of models for assessing the state of the operated patients with acquired heart diseases on the basis of the method of decision trees. This method allows you to develop an algorithm to establish the severity of neurohumoral imbalance in chronic heart failure , which makes it possible to automate this process in the future.

Keywords: chronic heart failure, decision tree, acquired heart defects.

Full text:
Truhachev_4_15_1.pdf

EQUIVALENT CIRCUIT CONTACTLESS DIRECT CURRENT MOTOR IN FORMATION OF THE BASE VECTOR

UDC 621.313.292

I.S. Fedosova, D.P. Kiselev, O.A. Kiseleva

In this paper we study the processes of equivalent circuits of contactless DC motor in the formation of the base vector. Systems of management of electric drives with rotor position sensor and using status observers. The equations of the components of the currents flowing in the stator windings in the form of multi-functional depending on winding parameters and initial conditions of the system.

Keywords: control pulse, trigger mode, equivalent circuit, contactless DC motor.

Full text:
KiseleviFedosova_4_15_2.pdf

FORMATION OF CONTROL PULSE BRUSHLESS DIRECT CURRENT MOTOR IN STARTING MODE

UDC 621.313.292

D.P. Kiselev, I.S. Fedosova, O.A. Kiseleva

In this work carried out studies of the formation of the control pulses contactless DC motor in the starting mode. The questions of the possibility of using the optimal vector control in the formation of the first drive of the base vector. It has been shown that in systems with a supervisor state of problems associated with the determination of the base vector having a maximum gain of the spatial intensity, as well as to determine the direction of rotation

Keywords: control pulse, trigger mode, equivalent circuit, contactless DC motor.

Full text:
KiseleviFedosova_4_15_1.pdf