THE SIMULATION OF RADIO WAVE SCATTERING ON THE STRUCTURES WITH ABSORBING LAYER
E. V. Aleshkina
This paper describes the problem of scattering of radio waves in a complex diffraction structure having a cut absorptive coating on part of its surface. The system of integral equations in the framework of it contact density potentials, green function and the initial frequency was formed. Once solved the system of equations with the application of the relevant basis functions based on the method of moments was calculated values of the effective area of scattering at given conditions of observation. Suggestions were made on how to form a subsystem of CAD, which will provide opportunities to conduct designing of equipment with the necessary values of the scattering characteristics. As input to this subsystem, you can apply the scattering structure, the sector of observation angles, the required value of the level for the characteristics of scattering of radio waves.
Keywords: scattering of radio waves, absorption, modeling, integral equation.
THE MATHEMATICAL MODELING OF RECRUITMENT
N. V. Murashkin
The paper deals with the construction of a mathematical model of search and evaluation of recruitment on the labour market. Describes the most common methods of personnel selection: interview (interview), the use of an assessment centre testing. Many candidates divided into two classes: the workers, who have completed a probationary period at the client company, and those who didn’t have it. Use a scoring model in which a vector of factors, reflecting the information provided in the summary of the employee that influence the dependent binary variable having the meaning of the successful completion of the employee probation period. In the case of nonlinear models, one possibility to determine the measure of the quality of a fitted model is to compare the number of incorrect predictions produced by the long model, and the predictions obtained by models in which the explanatory variable is only a constant.
Keywords: regression analysis, analysis of methods of personnel selection, interviewing method, test method, evaluation method of the voices of the applicant, the assessment of probability.
THE MODELING OF THE SCATTERING OF RADIO WAVES OF CELLULAR COMMUNICATION SYSTEMS ON THE ELEMENTS OF BUILDINGS
A.A. Alimbekov, E.A. Avdeenko, V.V. Shevelev
This paper considers the problem of scattering of electromagnetic waves in cellular communication systems, elements of buildings. As a basic method is proposed to use the radial approach. The main steps of the algorithm for the calculation of total attenuation of the signal caused by the diffraction at the corners of buildings. The loss caused by reflection of the radio signal from the earth, are calculated based on the Fresnel coefficients for a plane wave. Indicated input parameters for the calculation. A diagram of the module of calculation of fields scattered by buildings, which uses a block optimization. A classification of optimization techniques used in the optimization of communication systems. Methods associated with unconditional optimization are divided into: one-dimensional case multidimensional case. Optimization methods are divided into these: optimization under linear constraints, optimization under nonlinear constraints.
Keywords: diffraction, building, link, beam, electromagnetic wave scattering.
THE INTEGRATION OF GIS AND CAD IN WIRELESS COMMUNICATION SYSTEMS
A.A. Alimbekov, E.A. Avdeenko, V.V. Shevelev
For the design of wireless communication systems need to bind to a set of coordinates receiving and transmitting devices. This requires the use of electronic cards processed through geographic information systems. Use two approaches for concrete implementation of vector-vector and topological-nontopological model. This paper provides a description of the main exchange formats geographic information systems with CAD. For spatial data, make the representation in the form of a set of layers, each of which has a set of spatial objects – points, arcs or polygons. Considered tasks solved by the module geographic information systems. Given the input data used by the calculation model. Given the proposed algorithm of optimization module.
Keywords: automation, engineering, geographic information systems, wireless communication systems.
THE ALGORITHM OF SPECTRAL-TIME ANALYSIS OF SIGNALS IN DEVICES OF COMPUTERS
A. V. Gusev
The paper discusses methods for spectral analysis of signals. Discusses the importance of reliable measurement systems. The possibility of solving many practical and scientific problems in the collection and analysis of information using a universal computing systems. A diagram of information-measuring system and the method of streaming are considered. The proposal algorithm spectral-temporal analysis of telecommunication systems, it allows you to determine the degree of compression and window size of the transmitted data on the basis of simulation.
Keywords: information system, data transfer, data analysis methods.
THE ESTIMATION OF EFFICIENCY OF ACTIVITY OF EDUCATIONAL INSTITUTIONS OF SECONDARY PROFESSIONAL EDUCATION IN THE FIELD OF CONSUMER COOPERATION OF THE RUSSIAN FEDERATION
E. P. Boldyreva
One of the tools for improving the quality of education is the creation of an effective system of quality assessment of educational activity, which is able to identify the strengths and weaknesses of the educational process and to provide an objective assessment of the effectiveness of each educational organization. Identifies group of criteria for estimating the socio-economic efficiency of management schools, quality public education and cooperative education, the efficiency of managing the influx of talent and the implementation of PCC, the effectiveness of human resources management partnership management and career development of students, the effectiveness of innovation. A block diagram of an information system to assess the effectiveness of educational organizations
Keywords: education, consumer cooperation of the Russian Federation, co-operative educational institutions, quality of education, assessment of effectiveness of educational organizations.
COMPACT PATCH ANTENNA FOR MICROWAVE RANGE
The paper proposes to expand the range of your wireless network to use a small patch antenna using directional properties. The description of the antenna design are described and the principle of its operation, set its frequency and gain. The calculation range of the wireless network with the designed antenna. This graphic of the cross section of the radiation pattern in the horizontal plane, the spatial radiation pattern, based on the values of standing wave ratio against frequency. Designed antenna allows you to ensure the radio range of standard Wi-Fi line-of-sight at a distance of more than 1500 m, has a fairly wide beamwidth and high gain.
Keywords: patch antenna, wave propagation, data transmission, wireless communication.
ABOUT THE POSSIBILITIES OF ACCELERATED TESTING OF MEDICAL EQUIPMENT
In this paper, the analysis of possibilities of accelerated testing for medical equipment. When are the accelerated testing for reliability and time to failure, we believe that the boost modes, and this leads to the fact that intensifitsiruetsa physico-chemical processes without having to change the basic mechanisms of failures. Given the expression for the acceleration factor for a particular failure mechanism. Shows the main steps when carrying out physico-technical expertise. Forecasting of reliability of components of medical equipment is carried out based on the parameters of laws of distribution of time to failure and the values of the coefficients of acceleration, for most cases, use a logarithmically – normal distribution law.
Keywords: medical equipment, accelerated testing, failure examination.
HIDDEN IMAGE MASKING
Developed algorithms of image hidden masking which allow performing visual and automatic image authorization. These algorithms are based:
– on monochrome component transformation and subsequent image reconstruction;
– on matched filtration of imposed mask.
Developed algorithms were implemented in graphics environment Simulink that allowed demonstrating their efficiency.
Keywords: image, authorization, masking, RGB – components, cosine – transformation, matched filtration, correlation, autocorrelation.
INTUITIVE METHOD OF FACTORS SIGNIFICANCE RANKING
Effectiveness of fractional replicas application increases at non – fiction factors multiplication. It depends also on linear and non. – linear effects and factor experiments performance scheme in the presence of factors interactions. In this situation a priory information is desirable and even necessary. Developed here intuitive method of factors ranking in linear regression model based on regular plans and posterior rejection of least loaded factors. Its main advantage along with realization simplicity is only non fictive factors application. Base disadvantage along with intuitivism is swift effectiveness decrease at factors number rise.
Keywords: factor experiment, linear regression model, regular plan, relative load, ranking, non fictive factors, generating functions.