Vol 12, No 4 (2014)
- Year: 2014
- Articles: 20
- URL: https://journals.eco-vector.com/2073-3909/issue/view/3253
Articles
Realizatsiya diskretnogo veyvlet-preobrazovaniya v sisteme ostatochnykh klassov spetsial'nogo vida
Abstract
In article the design method the wavelet filter in RNS is offered. It is shown that RNS pos-sesses high potential for increase in productivity of filters as in the considered task performance only of operations of addition and multiplication which can be calculated very quickly in a modular form is required. On the example of Dobesha’s filter Db4 it is shown how it is possible to transform coefficients from a position numeral system to RNS. Results of modeling showed that the rounding error which is inevitably arising upon such transition doesn’t cause significant deviations in operation of the filter.
Infokommunikacionnye tehnologii. 2014;12(4):4-9
4-9
Veroyatnostnoe opisanie yavleniya tsentrobezhnoy oshibki pri peredache bezyzbytochnykh kodov po gaussovskim kanalam
Abstract
The phenomenon that occurs when the transmission of numerical codes on Gaussian chan-nels, leading to an increase of the mean square error recovery numbers as their distance from the center of the allowable range. Justified the name of this phenomenon as “centrifugal er-ror” transmission, the basic functions and numerical characteristics of its probabilistic description. Possible ways to eliminate the negative impact of this type of distortion to improve the noise immunity of transmission systems of numerical information.
Infokommunikacionnye tehnologii. 2014;12(4):9-16
9-16
16-24
Inzhenernaya metodika otsenki kachestva sistemy massovogo obsluzhivaniya M/M/n/q s nenadezhnymi kanalami i ee prilozhenie dlya analiza funktsionirovaniya sistem mnogokanal'noy svyazi v usloviyakh pomekh
Abstract
The rather simple calculation and evolution procedure of the quality of service of M/M/n/q queuing system with unsafe channels is offered. The variants of annex of this procedure for the researching of the functioning of multi-channel communication systems functioning under noises effect are shown.
Infokommunikacionnye tehnologii. 2014;12(4):24-32
24-32
Analiz vliyaniya izmeneniy parametrov vysokochastotnykh kabeley na kharakteristiki mul'timediynykh kabel'nykh setey
Abstract
Problems associated with the analysis of changes in the characteristics-vysokochas-frequency cables under the influence of the environment on the multimedia cable networks. Characteristic linear dependence of the change in loss cables dia-ranges by the operating frequency of the ambient temperature.
Infokommunikacionnye tehnologii. 2014;12(4):32-36
32-36
Pomekhoustoychivost' skhemy priema OFDM-signalov v kanale s pamyat'yu
Abstract
The technology of orthogonal frequency OFDM multiplexing is hosed on for motion of multi frequency signal. The block of consistent information symbols converts in block of parallel symbols; in which every information symbol satisfy certain frequency of the multi frequency signal. Increasing the spectral efficiency of the OFDM system will facilitate the development of advanced mobile networks.
Infokommunikacionnye tehnologii. 2014;12(4):37-40
37-40
Postroenie mul'tiservisnykh setey na osnove funktsional'nykh preobrazovaniy trafika
Abstract
For the construction of multi-service networks is proposed to use a model QS type M/M/n/m and achieving invariance to the structure of the processed network traffic due to its conversion and use properties of the invariance of the form of the differential probability and independent variables.
Infokommunikacionnye tehnologii. 2014;12(4):40-45
40-45
Povyshenie kachestva peredachi potokovykh dannykh v setyakh VPLA s pomoshch'yu PULL-PUSH-podkhoda
Abstract
In this paper, we analyze quality of video streaming in Flying Ad Hoc Networks (FANETs) with help of an NS-3 simulation tool. Considered network topology consists of source, destination and relay nodes and uses AODV and OLSR routing protocols. We estimate quality of video streaming based on average chunk delivery ratio PDRave and average application layer data deli-very speed Rave. We developed data delivery algorithm using PULL-PUSH approach to improve quality of video streaming. This paper presents performance investigation of developed algorithm in considered network topology with AODV and OLSR routing protocols.
Infokommunikacionnye tehnologii. 2014;12(4):45-50
45-50
Primenenie porogovykh funktsiy dlya izvlecheniya informatsii o tipakh dannykh pri poluchenii promezhutochnykh predstavleniy tekstov programm dlya yazykov s dinamicheskoy tipizatsiey
Abstract
This article shows approach for getting information of data types in languages with dynamic typing. It uses threshold functions to find right one. These functions are described in math model, which shows the whole approach. Results of its application, which was obtained for several projects, show efficiency of using it.
Infokommunikacionnye tehnologii. 2014;12(4):51-56
51-56
56-61
61-66
Organizatsiya protsessa otsenki innovatsionnogo razvitiya v sisteme «postavshchik-zakazchik» s ispol'zovaniem novykh informatsionnykh tekhnologiy
Abstract
The article discusses the problem of selection of the contractor for contracts for supply of inventory (TMC), technological equipment, as well as for the provision of services on repair and capital construction, services nature-based evaluation of organizational and technical activities using the method of convolution information SADT model.
Infokommunikacionnye tehnologii. 2014;12(4):66-70
66-70
Kontseptsiya ISUP dlya usovershenstvovaniya upravleniya raspredeleniem trudovykh resursov v IT-kompanii
Abstract
In this paper there is proposed a new concept of project management information system (PMIS) introduced to improve the efficiency of IT company performance. According to the results of ful-filled analysis the problem of labor forces management is the most complex and critical for a success of IT company business. To solve this problem it is proposed to implement fuzzy logic.
Infokommunikacionnye tehnologii. 2014;12(4):71-76
71-76
Kiral'nyy metamaterial dlya chastotno-selektivnoy kontsentratsii energii sverkhvysokochastotnogo izlucheniya
Abstract
Electrodynamics analysis of metamaterial formed by periodically placing thin-wire multiturn spiral elements in a homogeneous dielectric container. Solved the problem of reflection of a plane electromagnetic wave from said metamaterial and the coefficients of reflection and transmission main and cross-polarized components of the field. It is proved that the metamaterial can convert radially incident super high-frequency (UHF) radiation at the resonant frequency surface waves. Calculated frequency dependence of moduli of the coefficients of reflection and transmission main and cross-polarized components of the field at different geometrical dimensions of the container and spiral inclusions. It is shown that the resonant frequency of the incident field in the conversion surface waves satisfy a relation similar to the Bragg condition for the crystalline environment.
Infokommunikacionnye tehnologii. 2014;12(4):76-82
76-82
Tsvetovye iskazheniya v televidenii i metody ikh umen'sheniya
Abstract
Shows the sources of color distortions in the body-color vision, and that the chromaticity coordinates, which are located inside the triangle color gamut screen television may play colorimetrihesky exactly, ie without color distortion. We propose a method for implementing a television system with a colorimetric ion accurately reproduced color images.
Infokommunikacionnye tehnologii. 2014;12(4):82-87
82-87
87-93
Vliyanie dliny i chisla vitkov na zaderzhku v mikropoloskovoy meandrovoy linii
Abstract
The results of the full-wave analysis of microstrip meander delay lines are given. Signal distortions caused by electromagnetic coupling between the half-turns are presented. It has been shown that increasing the length and number of turns negatively affects on pulse signal integrity and linearly affect on delay in a meander line.
Infokommunikacionnye tehnologii. 2014;12(4):93-96
93-96
Ob utochnenii ponyatiya «mashinochitaemyy nositel'»
Abstract
The article discusses the currently used definitions of the term «a machine-readable medium» applied to the questions posed by court trials participants to IT professionals on the meaning of this term and its scope. The authors propose a number of new definitions to clarify the possible uncertainties that may be critical to the results of trials.
Infokommunikacionnye tehnologii. 2014;12(4):96-102
96-102
102-106
106-110