Summaries of the Issue
RECONFIGURABLE AND NONLINEAR METAMATERIALS Kivshar Yuri S , Orlov Alexey Anatolievich
We review the recent experimental results on reconfigurable and nonlinear microstructured metamaterials with negative refractive index. New types of reconfigurable metamaterials are suggested and described having either nonlinear magnetic or nonlinear electric response at microwave frequencies. By introducing a voltage variable capacitor as a nonlinear element within each resonator, the frequency shift of either magnetic or electric resonance is obtained at power changing of incident wave. A novel approach is discussed for efficient re-tuning of the transmission characteristics of metamaterials by the lattice period modulation. Some of the re-tuning mechanisms discussed here can be suitable for scaling toward optical wavelengths with useful applications realizable in a wide frequency range.
OPTICAL AND OPTICAL ELECTRONIC SYSTEMS. OPTICAL TECHNOLOGIES
DEVELOPMENT TENDENCIES OF COMPACT THIRD GENERATION INFRARED SYSTEMS BASED ON ACTIVE-PASSIVE METHOD Yury G. Yakushenkov
The main development tendencies of compact third generation infrared systems working by active-passive method are considered. The examples of these systems based on focal plane arrays for near-, short- and long- wave infrared ranges of optical spectrum are given.
COMPATIBILITY ANALYSIS OF FLUORINE SILICATE AND BOROSILICATE GLASS LAYERS FOR OPTICAL FIBER MANUFACTURING Korobeynikov Anatoliy Grigorievich, Gatchin Yuri A, Dukelskiy Konstantin V, Ter-Nersesyantz Egiche Vavikovich, Michail Eronyan, Natalia Nesterova
Research results of MCVD optical fiber workpieces receipt of fluorineborosilicate and compatibility of glass layers and quartz glass doped with fluorine and B2O3 are given. Studies indicate the mutual incompatibility of these additives.
PHOTONICS AND OPTICAL INFORMATICS
DIGITAL HOLOGRAPHIC MICROSCOPY: MODERN RECORDING METHODS OF MICRO OBJECTS HOLOGRAMS Vladislav Gendin , Gurov Igor P
Principles of digital holography and holographic microscopy as well as peculiarities of hologram recording are considered. Basic schemes of digital holograms recording for micro-objects, methods of resolution improving in digital holography and new methods of digital holography application for studying of micro objects are presented.
GENERATION OF RADIATION ON MULTIPLE FREQUENCIES IN GAZES AT PLASMA EXCITATION BY A STRONG FIELD OF FEW-CYCLE PULSES Kozlov Sergei A, Alexander Korolev, Svyatoslav Shtumpf
High-frequency radiation generation at neon optical breakdown by femtosecond few-cycle pulses is considered. It is shown that as the number of oscillations per pulse decreases up to just one, a shift of multiple harmonics to shorter wavelengths grows. The plasma dielectric nonlinearity leads to amplified redistribution of radiation energy to shorter wavelengths.
RADIATION INTERFERENCE ON TRIPLE AND COMBINATION FREQUENCIES AT THE SIMULTANEOUS NONLINEAR REFLECTION OF TWO FEMTOSECOND PULSES AT THE FUNDAMENTAL AND DOUBLED FREQUENCIES FROM A DIELECTRIC MEDIUM Olga Stolpovskaya, Putilin Sergey E, Bespalov Viktor G, Kozlov Sergei A
The paper presents theoretical and experimental results of simultaneous nonlinear reflection of two femtosecond pulses at the fundamental ω1 and doubled ω2= 2ω1frequencies from a dielectric medium. It is shown that the reflection of the two-component radiation leads to light pulses generating at the triple and combination frequencies. Moreover, the reflected triple frequency radiation spectrum represents a superposition of two components: the triple 3ω1and combination 2ω2- ω1. Interference between these two components leads to spectrum modulation at 3ω1frequency while the time delay changing between the incident pulses.
Investigation results of a scaling method for digital images based on discrete wavelet transform (DWT) are presented. Estimates of image distortions under image interpolation using the DWT are obtained. Influence of the basis wavelets choice on the transform errors of images under scaling is investigated.
INVESTIGATION OF MATERIALS INTERNAL MICROSTRUCTURE BY OPTICAL COHERENCE MICROSCOPY WITH A TUNABLE WAVELENGTH Gurov Igor P, Zhukova Ekaterina V., Margaryants Nikita B.
The studying possibilities of materials internal microstructure by optical coherence tomography with tunable wavelength (1305 ± 75 nm) on an example of biological and artificial origin tissues are discussed. The images of tomograms (B-scans) and 3D-image of research areas are given.
ANALYSIS OF CHARACTERISTICS AND OPTIMIZATION OF IMAGE REPRESENTATION FOR OPTICAL COHERENT TOMOGRAPHY Skakov Pavel Sergeevich
The choice of optimal image representation format is examined for data obtained by methods of optical coherent tomography in microstructure researches for random inhomogeneous mediums. Formats analysis is done meeting the requirements of knowledge domain and experimental results of efficiency test for images representation in different formats are considered. Efficient formats and choice of their parameters are recommended.
LASER AND BIOMEDICAL TECHNOLOGIES
LASER CLEANING: ASPECTS OF INDUSTRIAL APPLICATION Veiko Vadim Pavlovich, Anton A. Kishalov, Timofey Mutin, Смирнов В. Н.
The article deals with the main mechanisms of a metal surface laser cleaning. Experimental results of the metal surface cleaning with using of two laser types are given. The first laser works on 1,07 μm wavelength and has a 200 ns pulse duration and a 1 mJ pulse energy, the second laser works on 1.064 μm wavelength and has a 10 ns pulse duration, and 20 mJ pulse energy. Additionally, ranges of the laser cleaning application and its perspectives are given.
OPTICAL COHERENCE TOMOGRAPHY METHOD APPLICATION FOR ART OBJECTS INVESTIGATING PERFORMED IN TARSIA TECHNIQUE Gurov Igor P, Zhukova Ekaterina V., Anna Levshina
Possibilities of optical coherencetomography method application with tunable wavelength (1305 ± 75 nm) for decorative and applied arts objects research, made by wood tarsia technique are considered. The images of B-scans and 3D-images of research areas are presented.
TERAHERTZ ABSORPTION SPECTRA OF 2,3- BIPHOSPHOGLYCERATE IN RED BLOOD CELLS AND THEIR PRACTICAL SIGNIFICANCE Lyudmila Kamysheva , Yaroslav Grachyov, Lyudmila Kiseleva, Vashurin Nikita S, Oleg Lopatiev, Ivan Zeldi, Popov Ivan I, Bespalov Viktor G
The article deals with the study of 2,3-bifosfoglitserata diagnosis - an important organic phosphorus compound in the red blood cells of mammals. Experimentally obtained transmission spectra of blood with the addition of riboxin, which is an inhibitor of 2,3-biphosphoglycerate (2,3-BFG) mutase, in the range of 0.1 to 1 THz are presented.
ANALYSIS AND SYNTHESIS OF COMPLEX SYSTEMS
NONLINEAR SYSTEMS CONTROL ON THE BASE OF HYBRID MODELS WITH ADAPTATION Sergey A. Kolyubin, Efimov Denis V., Nikiforov Vladimir O, Bobtsov Alexey Alexeevich
The paper deals with the task of hybrid model synthesis for approximating of nonlinear systems dynamics. The model should be accurate as well as easy to implement for control algorithms development. Proposed approach provides real-time hybrid model adjustment. Combined control scheme has been considered.
OUTPUT CONTROL ALGORITHM WITH DISTURBANCE CANCELLATION FOR LINEAR PLANT WITH PARAMETRIC AND STRUCTURAL UNCERTAINTIES Bobtsov Alexey Alexeevich, Sergey A. Kolyubin, Pyrkin Anton Alexandrovich
The paper deals with an output stabilization problem for a linear plant disturbed by an external unknown sinusoidal perturbation. The solution is obtained for a class of linear systems with parametric and structural uncertainties.
IINFRARED TELESCOPE SCANNING AXIS ELECTRIC DRIVE CONTROL SYSTEM ACCURACY IMPROVING PROBLEM Tolmachov Valeriy, Dmitriy Subbotin
The accuracy improving problem of scanning axis electric drive control system based on the contactless electromagnetic converter with limited rotationangle wasdiscussed. Vector-matrix model and modeling methodologyof the closed speed control loop with proportional differential regulator was proposed. Scanning process simulation was performedandlong-term structural solutions for the control system were proposed.
COMPUTER SYSTEMS AND INFORMATION TECHNOLOGIES
EVALUATION METHOD OF SPEECH SIGNAL CLIPPING LEVEL Sergey V. Aleinik, Matveev Yuri Nikolaevich, Andrey Raev
The article deals with different evaluation methods of speech signal clipping level. A new method for a speech signal clipping level evaluation is presented. It is shown that the new method has better characteristics than other well-known methods.
INITIALIZATION PROBLEMS OF SPEAKERS’ SEGMENTATION SYSTEMS BASED ON VARIATION BAYESIAN ANALYSIS Kydashev Oleg Yu, Timur Pekhovsky
This paper presents a model description used for the speakers’ segmentation task. The iterative formulas approximating distribution of a posteriori speakers’ model parameters based on the made assumptions are given and the new original method for initializing model parameters is offered. The scheme of a speakers’ segmentation system based on developed approach is presented. The application of developed system gives relative reduction in error rate up to 26% both at Russian and English speech data bases.
THE USE OF DICTIONARY INFORMATION IN TEXT ANALYSIS Boyarsky Kirill , Evgeniy A. Kanevskiy, Stafeev Sergey K.
Approaches to some problems solving at computer analysis of Russian text are described. The issues associated with lexical and morphological ambiguity removal, with complex objects-phrases allocation in the text and using features of the context to improve the accuracy of text analysis are considered. It is shown that the use of dictionary information can play a crucial role in removing both morphological and part of speech and lexical homonymy.
MTBEAM SOFTWARE PRODUCT FOR VISUALIZATION OF THE OPTICAL WAVE PACKETS DYNAMICS FROM A FEW OSCILLATIONS Dmitry Kislin, Knyazev Mikhail Alexandrovich, Victor Zvyagin, Kozlov Sergei A
A software product is developed including a visualizer and calculation management program, able to solve the evolution fields modeling problem and spectra of electromagnetic wave packets that can have both spatial and temporal superbroadening spectra. The software package allows calculating not only locally, but on a remote computer or a supercomputer, and display calculation results in the form of charts and graphs. Examples of calculation visualization for diffraction on one-period terahertz pulse slit.
DYNAMIC PROPERTIES OF A NEURAL NETWORK MODEL OF SPATIAL MEMORY Lyakhovetskiy Vsevolod A. , Potapov Alexey Sergeevich
A model for movements sequences memorizing (spatial positions) based on the hetero-associative neural network is considered. An estimating criterion for correctness of memorized data is proposed as the number of iterations necessary for transition into some steady state. This criterion is in good agreement with psychophysiological facts and can be utilized for unsupervised training of the neural network model. Interpretation of different error types from the position of nonlinear dynamics is given.
COMPRESSION OF THREE-DIMENSIONAL BIOMEDICAL IMAGES BASED ON OCTREE REPRESENTATION Innokenty Zhdanov, Potapov Alexey Sergeevich, Oleg Scherbakov
The method of compression without losses based on octree representation in application to three-dimensional biomedical images was considered. The modification of this method that implements compression with losses using noises pre-filtering was suggested. It is shown that this method is better in quality of compression than methods of two-dimensional compression with losses or without them (PNG and JPEG) applied to three-dimensional images layer-by-layer.
MATERIALS TECHNOLOGY AND NANOTECHNOLOGIES
MEASUREMENT OF STEEL MAGNETIC SUSCEPTIBILITY UNDER CRYOGENIC CONDITIONS Ilya Yu. Ivanov, Alexander A. Vasiliev, Marat E. Vznuzdaev, Sergey Vorobyov, Alexander Getalov, Sergey Kotov, Peter A. Kravtsov, Alexander V. Nadtochy, Viktor A. Trofimov
Device for investigation of steel magnetic susceptibility at the cryogenic conditions has been designed and created in Petersburg Nuclear Physics Institute (PNPI). Experimental setup gives the possibility to measure the dynamic magnetic susceptibility in a wide range of temperatures (10-300K). Different types of stainless steel were tested and results are presented in the paper. Practical aim of the measurements was to find materials for the experiment MuSun with low magnetic susceptibility.
POLARIZED ATOMIC BEAM SOURCE FOR POLFUSION EXPERIMENT Sergey N. Terekhin, Alexander A. Vasiliev, Maxim Mikirtychyants, Peter A. Kravtsov, Marat E. Vznuzdaev
Laboratory forCryogenic and Superconducting of Petersburg Nuclear Physics Institute in collaboration with Saint Petersburg National Research University ITMO is creating a source of polarized atoms of hydrogen and deuterium for the international experiment to study nuclear fusion reaction of polarized deuterons (PolFusion). The experiment is taking place inRussia. Specialexperimental system will be done in frame of the project at Petersburg Nuclear Physics Institute. This article describes thebasic design principles of one set module - a source of polarized deuterium atoms. Radiofrequency dissociator and beam parameters control system are described in details.
THERMODYNAMIC ANALYSIS OF TWO-COMPONENT POLYMER BLENDS FORMATION Aleksander Podshivalov, Zuev Vyacheslav Viktorovich, Sergei Bronnikov
The method of electronic microscopy is used to investigate morphology of the polymer blends containing polyethylene of low density (LDPE)/polyamide-6 (PA-6) in 75 %/25 % proportion with emulsifier and compatibilizer additives. Histograms of the PA-6 particles size, obtained at statistical analysis of the blend microphotographs are described using the model of aggregation, constructed within thermodynamics of irreversible processes. It is established that at the components blending the PA-6 particles are dispersingin the LDPE phase and subsequently coalescence. The influence of the quantity of both compatibilizer and emulsifier entered into the blend and on the mean size of the PA-6 particles and on the mechanical properties of the blends is revealed.
THERMAL PHYSICS AND THEORETICAL HEAT ENGINEERING
THERMAL MODE OF A TWO-RANGE FLOATING GYRO Gromov Dmitry S
The results of a thermal mode investigation of a two-range floating gyro are described. Calculations of stationary and non-stationary thermal modes of a gyro are carried out, its thermal model is presented and recommendations to design optimization for reducing of temperature perturbations influence are given. The direction of further researches for present investigation development is proposed.
COMPUTER-AIDED DESIGN SYSTEMS
CONVERGENCE IMPROVING OF THE FINITE DIFFERENCE METHOD BY INTERIM SOLUTION CALCULATING Grishentsev Alexey Yu., Korobeynikov Anatoliy Grigorievich
The article deals with application currency ofthe finite difference method for differential equations solving with boundary conditions. A method for interim solution calculating for efficiency improvement of the finite difference method is suggested. Software implementation results of this method are given. Algorithmic implementation of the method in two-dimensional space is considered.
INFORMATION SECURITY METHODS AND SYSTEMS
DYNAMIC BAYESIAN NETWORK APPLICATION IN THE INTRUSION DETECTION SYSTEMS Arustamov Sergei A, Dayneko Vyacheslav Y
Issues of knownintrusion detection systems operation are stated. Architecture description of the developed intrusion detection system is given. The descriptions of used dynamic Bayesian network, learning algorithms and test domain network are cited. Errors of the first and second kind are defined during the operation of intrusion detection system. Comparative test results are given after the application of developed system and Snort system
INTERNET USER IDENTIFICATION METHOD Bessonova Ekaterina E, Igor A. Zikratov, Yuri Kolesnikov, Vladislav Roskov
The article deals with mechanisms for user identification in the Internet. A way of feature space forming for user identification is suggested and an identification method based on secondary characteristics of working environment is proved. A computational experiment was conducted for results verification.
ECONOMICS AND FINANCES. MANAGEMENT
INFORMATION TECHNOLOGIES FOR SYSTEM-DYNAMIC MODELS DEVELOPMENT OF REGIONAL INFORMATION AND COMMUNICATION SYSTEMS Igor Datyev
For the purpose of information support efficiency enhancement of regional information and communication systems (RICS) development forecasting a comprehensive analysis method of RICS development dynamics in view of socio-economic environment characteristics has been proposed. Information technologies and software toolkits for RICS system-dynamic models automated engineering have been developed.
STAKEHOLDERS INTERACTION DURING FORMATION AND REALIZATION OF THE COMMERCIAL POLICY IN SAINT PETERSBURG Roman Lugovskoy, Denis Solovyov, Vitaliy Sysoev
Interested parties in formation and realization of an effective commercial policy are revealed. The analysis of stakeholders modern mutual relations is carried out and directions of their interaction are offered.
CASCADE REDUCTION APPROACH FOR IDENTIFICATION PROBLEMS Aranovskiy Stanislav V., Bobtsov Alexey Alexeevich, Pyrkin Anton Alexandrovich
Identification problem of the partial set of unknown parameters in the linear regression model was considered. The reduction procedure was proposed allowing rewriting of the original model in the reduced form containing less unknown parameters. The existence conditions of the reduced model were investigated coming to the linear independence of the exciting signals.
FEATURE SELECTION FOR SPEAKER’S EMOTION RECOGNITION Sholokhov Alexey Vladimirovich
The article deals with the problem of the most informative features selecting for automatic emotional speaker’s state recognition. Genetic algorithm was used to obtain the optimal subset of features for a given quality criterion of recognition.
HIDDEN MARKOV MODELS-BASED RUSSIAN SPEECH SYNTHESIS Pavel Chistikov
This paper presents the approach to speech synthesis based on hidden Markov models for the Russian language. State clusterization algorithm is used to improve the flexibility of the system. The scheme of excitation generation is also presented.
The article deals with construction and functioning of the automated gathering and performance estimation of homework carrying out with Internet technologies in remote leaning.
AUTOMATED SYSTEM DEVELOPMENT FOR NEUROSURGERY Yuri Skupov, Kiselev Sergey S., Andrey Anichkov, Yury Z. Polonsky , Alexander Seregin
The article deals with analysis of modern systems for stereotactic surgery. Calculation method for brain aims coordinates and pointing method are described. A new automated system and its operation principles are described.
АPPLICABILITY СRITERIA OF THE COLOR SPACES FOR OPTICAL-ELECTRONIC MINERALS COLOR ANALYSIS SYSTEMS Anatoly Vakulenko, Gorbunova Elena V., Chertov Alexander N.
Evaluation criteria of the color space applicability for mineral objects color description in terms of analysis, identification, and automatic separation efficiency by optical-electronic methods in automatic mode are discussed
SYNCHRONIZATION PROBLEMS OF FLOW PROCESSES IN THE SUPPLY CHAINS Vladimir Fetisov, Dmitriy Golovtsov
This paper discusses the causes of errors in production planning and management policy at customer order intake in the supply chains.