Abstracts of number Journal Scientific and Technical Of Information Technologies, Mechanics and Optics

2009 , VOLUME 09, NUMBER 1 ( JANUARY-FEBRUARY )

ISSN 2226-1494 (print), ISSN 2500-0373 (online)

Publications

2024

Editor-in-Chief

Nikiforov
Vladimir O.
D.Sc., Prof.

Partners

Summaries of the Issue

ANALYSIS AND SYNTHESIS OF COMPLEX SYSTEMS

ANALYSIS AND SYNTHESIS METHODS OF ELECTROTECHNICAL COMPLEXES POWER SUBSYSTEMS WITH HIGH POWER PARAMETERS Borisov Pavel, Valentin S. Tomasov

Analysis and synthesis methods of electro technical complexes power subsystems with high power parameters are considered at unilateral and bilateral power consumption and depending on type and properties of the pri-mary power supply, character and operating load conditions. The search of project variants is performed during optimization problem decision that allows making the proved choice of a final variant of the power subsystem project.

ADAPTIVE AIR-TO-FUEL RATIO AND TORQUE CONTROL OF INJECTOR INTERNAL COMBUSTION ENGINES Gerasimov Dmitriy N, Kolyubin Sergey A, Nikiforov Vladimir O

An algorithm of adaptive two-channel air-to-fuel ratio and torque control in injector internal combustion engines is proposed in the paper. The proposed control is based on a nonlinear mathematical model of the engine and on special integral adaptation algorithms with high rate of convergence.

STABILITY ANALYSIS AND SYNTHESIS OF DIGITAL CONTROL SYSTEMS WITH PULSE POWER AMPLIFYING DEVICES Nikitina Mariya, Osipov Dmitriy, Tolmachov Valeriy

The article deals with the method of adaptive control system synthesis including digital regulators and multi-module pulse power amplifying device from the stability providing condition of the given turn-down and the specified operation speed of parameters to the power circuit at the specified level of current pulsations in loading and limited commutation frequency of the power keys.

ENERGY CHARACTERISTIC OF DISCRETE WAVELET TRANSFORMS: APPLICATION FOR TRIBOLOGICAL AND PHYSIOLOGICAL SIGNALS Musalimov Victor M, Olga E. Dick, Tyurin Andrey

The article deals with the problem of nonstationary signals analysis obtained under different experimental condi-tions. The new estimation method of the spectral energy density parameters of a signal and its details obtained for the discrete wavelet decomposition is suggested. The efficiency of the method is tested for profilograms of the metallic samples surface and kinetic tremor arising while keeping isometric force of the human hand. Action parameters analysis for the profilogram enables us to elucidate the energy structure of the friction surface layers. Analysis of time series of kinetic tremor with action parameters allows distinguishing the difference between healthy patients from a Parkinson tremor.

CHARACTERISTICS OF MULTI-CHANNEL QUEUING SYSTEMS WITH EQUIVALENT THROUGHPUT CAPACITY Sosnin Vladimir V

Characteristics of multi-channel queuing systems with non-exponential distribution laws of parameters are ana-lyzed using simulation. The method for choosing optimal channels number is proposed. The influence of input calls flow parameter to the average sojourn time is studied in details.

MULTIMASS SYSTEM APPLICATION IN MICROMECHANICAL GYROS FOR INCREASE OF RESISTANCE TO VIBRATION Evstifeev Michail I., Rozentsvein Dmitriy

Multimass system application in micromechanical gyros for increase of resistance to vibration is discussed. lin-ear and angular oscillators with mechanical and electrical interconnections are analyzed. requirements for design parameters are derived with due account of resistance for vibratory overload.

RELIABILITY EVALUATION OF STRUCTURALLY REDUNDANT ITEMS DURING COMPLEX TECHNICAL SYSTEMS ENGINEERING Gatchin Yuri A, Lobov Vadim, Kuznetsova Olga A

The article is devoted to the practical experience of reliability (failure-free operation) prediction during engineer-ing of structurally redundant items, ingressed into complex technical systems and based on the devices with in-complete control of failures and restrictions in non-failure operation of control means as well as switching ele-ments from the major device to the redundant one.

MATERIALS TECHNOLOGY AND NANOTECHNOLOGIES

MORPHOLOGY AND DYNAMICS OF NANOPHASE Svitenkov Andrey, Lesnichiy Vasiliy V., Sergey A. Chivilikhin , Gusarov Victor

The results of liquid structure simulation by molecular dynamics method in nanorange are described in the pre-sent article. Ordered crystal-like fragments in nanophase called crystallites were found as a result of simulation. Their forming features in different conditions are considered.

MOLECULAR VISUALIZATION IN MAGNETIC-RESONANCE TOMOGRAPHY BY ECHO-PLANAR IMAGING TECHNIQUES Anna O. Kaznacheeva

Molecular visualizing techniques using magnetic-resonance imaging (MRI) are considered. Echo-planar imaging (EPI) abilities for diffusion measuring and functional maps building were analyzed and image quality affecting factors were estimated. The suggested data acquisition parameters allow increasing accuracy of the diffusion coeffi-cient estimation and functional maps building, the results of the measurement were estimated.

THE INCREASING OF SOLDER JOINTS RELIABILITY UNDER THERMOMECHANICAL STRESS BY MEANS OF UNDERFILLING BALL GRID ARRAY OF BGA PACKAGES Гераничев В. Н.

The encapsulation process (underfilling) was examined, that traditionally has been used as a part of Flip Chip assembly process. It is proposed to use underfilling for long-term protection of BGA devices in harsh operating environments. Specific guidelines were defined to ensure stability and quality of the encapsu-lation of large BGAs. In addition, this paper includes experimental data on thermal cycling for protected and nonprotected BGA samples.

INFORMATION SECURITY METHODS AND SYSTEMS

DISASTER RECOVERY PLANNING FOR BUSINESS PROCESSES INFORMATION AND COMMUNICATION INFRASTRUCTURE Arustamov Sergei A

The article contains presentation of disaster recovery planning for IT and communication infrastructure support-ing business processes based on deployment experience in a credit and financial foreign enterprise. Basic steps of development and deployment for IT and communication infrastructure have been analyzed, some recommen-dations have been generated improving quality of suggested solution, a formal indicator measuring the quality of deployment has been proposed.

THREATS AND ANOMALIES DETECTION USING MODERN COMPUTER NETWORK MONITORING TECHNIQUES Alexei V. Girik

Modern techniques for telecommunications network traffic analysis and their highs and lows are discussed in the paper. Threats and intrusion detection model is proposed that is based on security indices forecasts and forecasts comparison with normal profile for particular network.

TRACING CHANGES IN NETWORK TOPOLOGY AND SECURITY PROBLEMS DECISION ON THE BASIS OF THE DATA FLOWS ANALYSIS Budko Marina B, Michail Yu. Budko

Methods for detecting broadcast storms and dynamic network topology exploration using data streams analysis are observed. Technique for detecting network broadcast storm, its source and domain are described. Criteria comparison for searching of similar network traffic patterns is given.

INTEGRATION OF DIGITAL WATERMARKS INTO AUDIO SIGNAL USING THE METHOD OF SPECTRUM EXPANSION Korobeynikov Anatoliy Grigorievich, Daurskikh Alexander, Pavlova Nadezhda

This article has a good look at the steganographical method of digital watermark integration into audio signal. It also provides with main steps of practical realization of this algorithm. You can find working structure of the algorithm of coding and decoding messages.

COMPUTER SYSTEMS AND INFORMATION TECHNOLOGIES

AVAILABILITY ANALYSIS OF MULTILEVEL COMMUNICATION SUBSYSTEM OF COMPUTER SYSTEMS WITH CLASTER ARCHITECTURE Bogatyrev Vladimir A, Bogatyrev Stanislav Vladimirovich

Standard subsystem reliability of three-level reserved communication system is evaluated. Each switch node is represented as a node, containing basic equipment, which failure causes node crash, and equipment, which fail-ure activates inoperability of the corresponding port.

UPDATE SYSTEM OF SOFTWARE LUCH-2 HARDWARE Klyuchev Arkadiy O, Petrov Evgeniy

The article is devoted to the problem of software update in the distributed control systems (DCS). The brief re-view of existent DCS programming facilities is conducted. Programming method, using the concept of aims, uniting DCS resources with similar properties, load images, containing both programmable information and con-trol program, and simple virtual machine LVM, interpreting load images is offered.

CLASSIFICATION OF CONNECTIONS BETWEEN WEB APPLICATION PARTS AND WEB APPLICATION MODELING WITH THE FINITE STATE MACHINES Ozhiganov Aleхander A., Chepurnoy Alexander

100

This paper describes classification of links between web application elements. Web application example and classification of its links are given. Modeling method for such links with finite state machines is offered. Analy-sis of finite state machines properties used in this approach is described.

LOSSY IMAGE COMPRESSION BASED ON ADAPTIVE SEGMENTATION Tropchenko Alexander Juvenalievich, Luzhkov Yuri

106

The essential of compression algorithm based on detection of local areas is described. Besides, the ability of its application to video sequences compression is discussed.

P-CAD-2006 PACKAGE FUNCTIONAL ANALYSIS BASED ON USAGE EXPERIENCE Arustamov Sergei A, Gatchin Yuri A, Romanova Eva B.

113

The article contains presentation of engineering and technological phases of printing circuit board design process and functional links between them. Functional analysis of P-CAD-2006 package has been made with the idea to check the complete coverage of these phases. Some data related to the actual cases of design for printed circuit boards of different complexity is brought to reader’s attention. Some findings certifying incomplete coverage of all design phases have been generated and directions to enrich the package functionality have been formulated.