Summaries of the Issue
MODERN STATE AND DEVELOPMENT PERSPECTIVES OF FOREIGN INFRARED IMAGERS Viktor V. Tarasov, Yury G. Yakushenkov
Short information about the foreign infrared imagers (II) development programs and their element base (foremost, about the optical systems and focal plane arrays – FPA) is stated. Main attention is devoted to the third generation of II working in two or more spectral bands with FPA. Some examples of military, civil and «dual assignment» of II are cited. Perspectives of II development during the nearest years are considered.
OPTICAL AND OPTICAL ELECTRONIC SYSTEMS. OPTICAL TECHNOLOGIES
CORRECTION METHOD OF FIELD CURVATURE IN WIDE-ANGLE OBJECTIVE LENS Bezrukov Vyacheslav Alexeevich, Karpova Galina Vasilievna
The article deals with the method of field curvature correction in wide-angle objectives and technique of its implementation. The correctional elements were used with definite values of longitudinal magnification along the chief ray to solve the problem of correcting components synthesis. Design parameters of these elements were related mathematically with its real aberration, in particular, the aberration of astigmatism.
METHOD OF ANGULAR SELECTIVE REGULATION FOR DIRECTIONAL LIGHT Zakirullin Rustam S
The article deals with a method of angular selective regulation for directional light transmission, when a light source moves with respect to the glazed object. An optical filter with grating layers on the two surfaces of the glass substrate provides angular regulation by the relative position of gratings. Both gratings consist of absorptive, scattering or reflective strips, alternating with strips of raw surface of the filter glass. A graphicanalytical method for angular characteristics calculating of light transmission for the plane shape filter is described. At a pre-known trajectory of the light source the light transmission characteristics can be pre-adapted to the change in the incidence angles. The graphic-analytical calculation results are confirmed experimentally. The regulation method potential in architectural glazing, in optical and lighting devices is considered.
CONTINUOUS SPECTRA RESTORATION BY AN ADAPTIVE WAY OF COMPUTING EXPERIMENTS WITH REGULARIZATION Sizikov Valery S , Krivykh Alexander V
The article deals with inverse spectroscopy problem - restoration of continuous spectra by mathematical treatment of measured spectra, distorted by the spectrometer instrument function and noises. The problem is reduced to solution of the first-kind Fredholm integral equation. This problem is illegal; therefore, the Tikhonov regularization method is used for stable numerical solving of the equation. Furthermore, the adaptive way of computing experiments is used, according to which, one treats the model spectrum Q with prescribed true spectrum z and simulated measured spectrum u with regard to additional (a priori) information about the true spectrum P. This makes it possible to choose the regularization parameter a. The proposed technique can be used to enhance the spectrometer resolving power. Numerical illustrations are given.
SOLUTION METHOD OF DYNAMIC ROUTING AND WAVE LENGTH ASSIGNMENT PROBLEM FOR WDM NETWORKS WITH TAKING INTO ACCOUNT FOUR-WAVE MIXING EFFECT Ageyev Dmitry V, Pereverzev Alexander A
The problem of dynamic route selection and wavelengths assignment in WDM networks is solved. This problem is important in WDM network management when requests are serviced for short-term connection installation and excess traffic is transferred. The proposed solution method is heuristic and is an improvement of the previously known method by taking into account the influence of four-wave mixing and using the new metric for finding the routes prospective for application. This makes it possible to reduce the probability of blocking calls during the connections at the average of 13% and the value of Q factor at 0.812.
IMAGE QUALITY FORECASTING FOR SPACE OBJECTS Altukhov Alexander I., Gnusarev Nicholai V, Korshunov Denis S
The article deals with an approach to quality predicting of the space objects images, which can be used to plan optoelectronic systems of remote sensing satellites work programs. The proposed approach is based on evaluation of the optoelectronic equipment transfer properties and calculation of indexes images quality considering the influence of the orbital shooting conditions.
PHOTONICS AND OPTICAL INFORMATICS
COHERENCE TIME CALCULATION OF FEMTOSECOND SPECTRAL SUPERCONTINUUM IN QUARTZ OPTICAL FIBER Melnick Maxim V, Tsypkin Anton N
It is shown that in the case of femtosecond spectral supercontinuum generation in quartz fiber in the areas of normal, abnormal and zero group velocity dispersion, with an increase of the central wavelength of the femtosecond laser pulse at the input, the coherence radiation time with ultra-wide spectrum is significantly reduced. However, in the region of zero group dispersion of quartz fiber there is a "leap" of coherence time. For example, for the initial pulse duration of 40 fs at 800 nm at spectral supercontinuum generation in quartz fiber, the coherence time is 22 fs. With the increase of wavelength, the coherence time is reduced to 4 fs at a wavelength of 1180 nm. In the area of zero group dispersion, the coherence time is increased dramatically to 20 fs, after which it is reduced, reaching a minimum of 4 fs at a wavelength of 1560 nm.
COLLIMATION AND FOCUSING OF PARAXIAL WAVE PACKET OBTAINED BY DIFFRACTION IN THE FAR AREA OF INITIAL SINGLE-CYCLE WAVE Drozdov Arkadiy A, Kozlov Sergei A
It is shown that during the collimation of paraxial wave packet generated by diffraction in the far area of initial single-cycle wave a "W-shaped" 1.5 cycle spatiotemporal structure is formed, and its duration is proportional to the distance from the beam axis, and its central part is moving faster than the peripheral. With the increase of propagated distance by a collimated radiation from the collimating to focusing mirror the wave packet in the focus changes from 1.5 cycle wave to single-cycle and again backwards, the maximum of its spectrum is shifted first to the high frequencies at the beam axis and then back to the low frequencies. Single-cycle wave at the mirror focus is identical to the original one for collimating and focusing mirrors with equal focal lengths and distance between them is equal to twice focal length.
ANALYSIS AND SYNTHESIS OF COMPLEX SYSTEMS
ROBUST SUBOPTIMAL CONTROL OF AIRCRAFT LATERAL MOVEMENT AT LANDING CONDITIONS Furtat Igor Borisivich
The paper considers the robust suboptimal control of lateral movement of the aircraft at landing conditions. The algorithm providing subminimization of the performance index for parametric uncertainty model of the aircraft is developed. Simulation results, illustrating the effectiveness of the algorithm, are considered.
PROCESS OSCILLATIVITY STUDY IN APERIODIC CONTINUOUS SYSTEMS, GENERATED BY EIGENVALUES MULTIPLICATION FACTOR Akunov Taalaybek A, Dudarenko Natalya Alexandrovna, Polinova Nina Alexandrovna, Ushakov Anatoly Vladimirovich
The article deals with the steady aperiodic continuous system with state matrix obtaining the spectrum of multiple eigenvalues which multiplicity is equal to dimension of its state vector. It is shown that if the eigenvalue magnitude is less than unity, in system free transient motion on norm of state vector the oscillativity is found which becomes apparent by initial overshoot, being replaced by monotonous movement to quiescent state. It is established that the less eigenvalue modulo and the more its multiplicity, the more overshoot size.
DESIGN AND ENGINEERING BACKGROUND FOR STATION NETWORKS OF VERTICAL IONOSPHERE SOUNDING Grishentsev Alexey Yu., Korobeynikov Anatoliy Grigorievich
The paper deals with analysis of the network stations structure for ionosphere vertical sounding. Design features and creation principle of the program complexes for automated processing, analysis and storage of ionosphere sounding are considered. Conceptual model of complex database control system is created. The results of work are used in research practice of leading national organizations to study the ionosphere. Obtained application results of suggested algorithms and programs for automated processing and analysis of ionosphere vertical sounding are shown.
COMPUTER SYSTEMS AND INFORMATION TECHNOLOGIES
RELIABILITY OF REDUNDANT COMPUTING COMPLEX WITH RECOVERY LIMITATIONS Bogatyrev Vladimir A, Aleksankov Sergei M , Demidov Daniil Valentinovich, Bezzubov Vladimir F
The article deals with Markov reliability models ofredundant computing systems, making it possible to take into account the effect of the limited recovery capacity from improper data loss or interruptions of the computational process during recovery on the unsteady availability.
EFFICIENCY ANALYSIS OF HASHING METHODS FOR FILE SYSTEMS IN USER MODE Ivanov Evgeniy Yu, Kosyakov Mikhail S
The article deals with characteristics and performance of interaction protocols between virtual file system and file system, their influence on processing power of microkernel operating systems. User mode implementation of ext2 file system for MINIX 3 OS is used to show that in microkernel operating systems file object identification time might increase up to 26 times in comparison with monolithic systems. Therefore, we present efficiency analysis of various hashing methods for file systems, running in user mode. Studies have shown that using hashing methods recommended in this paper it is possible to achieve competitive performance of the considered component of I/O stacks in microkernel and monolithic operating systems.
QUERIES DISTRIBUTION OPTIMIZATION BETWEEN CLUSTERS OF FAULT-TOLERANT COMPUTING SYSTEM Bogatyrev Vladimir A, Bogatyrev Anatoly Vladimirovich, Golubev Ivan Yu, Bogatyryev Stanislav Vladimirovich
Reliability assessment of distributed computing systems is proposed designed to redistribute requests flow at requests changes, failures and disconnections of system components combined into a set of clusters. Proposed and solved The problem of requests reallocation process optimizing between clusters, based on its impact on the delay of service and reliability, is proposed and solved.
THE ALGORITHM AND PROGRAM OF M-MATRICES SEARCH AND STUDY Balonin Yury N, Sergeev Mikhail B
The algorithm and software for search and study of orthogonal bases matrices – minimax matrices (M-matrix) are considered. The algorithm scheme is shown, comments on calculation blocks are given, and interface of the MMatrix software system developed with participation of the authors is explained. The results of the universal algorithm work are presented as Hadamard matrices, Belevitch matrices (C-matrices, conference matrices) and matrices of even and odd orders complementary and closely related to those ones by their properties, in particular, the matrix of the 22-th order for which there is no C-matrix. Examples of portraits for alternative matrices of the 255-th and the 257-th orders are given corresponding to the sequences of Mersenne and Fermat numbers. A new way to get Hadamard matrices is explained, different from the previously known procedures based on iterative processes and calculations of Lagrange symbols, with theoretical and practical meaning.
AGENT-BASED APPROACH TO BUSINESS PROCESSES SIMULATION IN eEPC NOTATION Lantsev Yevgeniy A, Dorrer Mikhail G
A set-theoretic formalism of models describing for business processes in ARIS eEPC methodology and AnyLogic agent-based simulation models is proposed and developed. Translation method from model in eEPC notation into agent-based AnyLogic simulation model is developed. An experiment is performed of model translating in eEPC notation into AnyLogic agent-based simulation model based on the developed method.
PLANNING MODEL OF TIME-FREQUENCY RESOURCE IN THE DOWNLINK OF LTE TECHNOLOGY Garkusha Sergei V, Vasylenko Yuri A
Development results of planning mathematical model for time-frequency resource of LTE downlink. The proposed model is aimed to ensure quality of service wireless users by providing user stations with required data rates. A comparative analysis of the proposed model with existing methods in terms of the overall performance of downlink, the degree of balancing capacity and the probability of providing selected user stations with required rate. It is shown that the proposed model under high requirements to the transmission rate of user stations, compared with known methods, makes it possible to increase the degree of balance bandwidth downlink up to 5-20%, and increase the probability of providing user stations with desired transmission rate up to 40–-100%.
LASER SYSTEMS AND LASER TECHNOLOGIES
RADIATION CHARACTERISTICS RESEARCH OF THE Q-SWITCHED ER:YLF LASER UNDER CONDITIONS OF THE GAIN SPATIAL INHOMOGENEITY Nazarov Vyacheslav V, Khloponin Leonid V, Khramov Valery Yu., Fedorov Nikita A
A numerical model of the solid-state laser with longitudinal diode pumping making it possible to investigate the properties of Er:YLF laser radiation under conditions of the gain spatial inhomogeneity is developed. Dependence of energy and spatial radiation properties on the spatial parameters of the pumping beam and the activator concentration in the active element is obtained. The relationship between pulse energy and ratio of the fundamental mode radius to the radius of the pump beam is illustrated.
NUMERICAL SIMULATION OF Q-SWITCHED Nd: YAG LASER WITH UNSTABLE RESONATOR AND OUTPUT VARIABLE REFLECTIVITY MIRROR Dubinkin Ilya N, Nazarov Vyacheslav V, Khloponin Leonid V, Khramov Valery Yu.
The article deals with a method of numerical simulation of laser oscillation in the radially symmetric unstable resonator with an output variable reflectivity mirror (VRM). Research results of the VRM parameters influence on the spatial and energy properties of the laser radiation are obtained. Numerical simulation of laser oscillation in active and passive Q-switching and comparative analysis of the spatial and energy radiation characteristics is done for these modes.
LASER AND BIOMEDICAL TECHNOLOGIES
TERAHERTZ REFLECTANCE SPECTRA OF SKIN DERMATITIS AND MORPHOLOGICAL CHANGES Smolyanskaya Olga A, Ezerskaya Anna A, Prozheev Igor V, Strepitov Evgeniy A
The article deals withthe diagnostics possibility of dermatitis and morphological changes of human skin using terahertz frequency range equal to 2,0¸0,05 THz. Features of different types of human skin diseases occur in vivo over the entire frequency range, especially in the field of vibration: 2,0¸1,5 THz. They were caused by the backscattering on skin new formations in its upper layers. In terahertz reflection spectra spectral lines of different dermatitis, age spots, haematoma are well distinguishable. Terahertz radiation penetrates well through the medical bandages. At the same time in a single scan, lasting about one minute, the spectrum is processed not only of the bandages, but of different skin layers.
COMPUTATIONAL MODELING OF AIRFLOW IN NONREGULAR SHAPED CHANNELS Voronin Aleksei A, Lukyanov Gennadiy N, Roman Neronov
The basic approaches to computational modeling of airflow in the human nasal cavity are analyzed. Different models of turbulent flow which may be used in order to calculate air velocity and pressure are discussed. Experimental measurement results of airflow temperature are illustrated. Geometrical model of human nasal cavity reconstructed from computer-aided tomography scans and numerical simulation results of airflow inside this model are also given. Spatial distributions of velocity and temperature for inhaled and exhaled air are shown.
THE METHOD FOR MEASUREMENT AND CALCULATION OF BREATH CHARACTERISTICS Khankov S.I., Kormilitsin Alexander Yu, Skorubskiy Vladimir I
The article deals with thethermo physical model of air flow energy exchange forinhalation and exhalation, which uses turbulence properties. On the base ofthis model,measurement sensors and calculation methods can be built for air flow parameters, characterizing volume of the lungs and speed of air flow. Impaired lung function and cardiovascular system affect the parameters of air flow. Research results form the basis for design of air flow parameters sensorand development of algorithms for portable devices functional diagnostics.
BREATH PARAMETERS MEASUREMENT BY AIR FLOW SENSOR Kormilitsin Alexander Yu, Khankov S.I., Skorubskiy Vladimir I
The article deals with parameters research and analysis for a new type of air flow sensor (AFS). The experimental results are given for comparison with sensors existing in clinical practice. AFS were compared by a number of parameters: spectral density distribution of signal, sensor response to acoustic influence, linearity and inertial properties of sensor, response of the AFS to the energy flow with an adjustable temperature, influence of structural rigidity.
MATERIALS TECHNOLOGY AND NANOTECHNOLOGIES
IDENTIFICATION OF LUMINESCENT CENTRES IN GLASS WITH COPPER AND CHLORINE IONS Babkina Anastasia N., Nikonorov Nikolay V. , Sidorov Alexander Ivanvich, Shakhverdov Teimur Azimoich, Shirshnev Pavel S.
Research results of luminescent and excitation spectra of potassium-alumina-borate glass with copper and chlorine ions luminescence are submitted. It is shown, that before the heat treatment glass luminescence is connected with molecular clusters Cun (n < 10). The broadband luminescence in the visible spectral region, appearing after the heat treatment, is due to the appearance of (CuCl)n and (Cu2O)n molecular clusters in glass matrix.
MODIFICATION OF SILICON ABSORPTIVITY UNDER FEMTOSECOND LASER PULSE Igor Guk, Shandybina Galina D., Yakovlev Yevgeniy Borisivich
The article deals with theoreticalmodeling results of the combined influence of nonlinear absorptivity and absorption coefficient on the spatial and temporal distribution of the electron-hole plasma and the dynamics of the specific absorption flux in silicon under femtosecond laser pulse. It is shown thatincreased absorption of the hot electron gas makes the main contribution to the change in specific absorption flux. Obtained results were compared with the known views about the polariton mechanism,which is usedfor the interpretation of femtosecond laser silicon microstructuring. There aredemonstratedThe need to consider absorption capacity dynamics in the regimes assessment of ultra short laser semiconductor processing.
MICROSTRUCTURING MECHANISM OF SiO2/Si SYSTEM UNDER IRRADIATION BY A SCANNING PULSED FIBER LASER BEAM Skvortsov Albert Matveevich, Huynh Cong Tu , Roman Khalestkiy
Microstructuring mechanism of SiO2/Si system under irradiation with a pulsed fiber ILI-1-50 laser using laser beam scanning mode is considered.The results of microstructuring are given with such radiation power when there is local melting - crystallization of silicon, but not SiO2 film destruction. It is shown that at low radiation dose (radiation with convergent laser beams) silicon melting is localized on the silicon surface at structural defects, in particular, in places where the dislocations generated with laser irradiation exit on surface. It is also shown that by increasing the radiation dose the area of the melt zone increases at first, then the closure of these areas occurs and the formation of long narrow "channels" of the melt takes place. In this case SiO2 film acquires morphology of a structured silicon surface.
AL2O3 NANOSTRUCTURED FILMS CREATION BY METHOD OF ELECTROCHEMICAL ANODIZING Zhukov Mikhail V, Vadim Levichev
Thin oxide films of aluminum were investigated by method of scanning probe microscopy. Electrical parameters of anodizing process were studied on different samples of aluminum to get the most structured oxide. The comparison of surface structure topography was held on oxide films by NTegra scanning probe microscope.
INSTRUMENT-MAKING TECHNIQUE. ORGANIZATION OF PRODUCTION
EFFECT OF SURFACE ROUGHNESS ON THE STRENGTH OF PRESS CONNECTIONS Ivanov Andrey Yu, Leonov Dimilyan B
The article deals withthe influenceof experimental study ofthe surface roughness effect on thestrengthof pressconnections by nonparametric criteria for evaluatingand monitoring the surface microgeometry. The techniquegives the possibility to determine the best surface roughness feasible in specific production conditions, which provides the necessary effort of connections decompression.
INFORMATION SECURITY METHODS AND SYSTEMS
ANALYSIS METHOD OF INFORMATION SECURITY SYSTEMS ARCHITECTURE BASED ON STANDARD ELEMENTS Mikhail Sukhoparov, Igor Solovyov, Lebedev Ilya S, Igor I. Komarov
The article deals with a method of system architecture of information security based on standard elements. The approach is based on the probabilistic characteristics of standard security features, takes into account the flow of events for a typical element of GIS, which makes it possible to do comparative analysis and architecture choice validation in the early stages of the life cycle. The paper presents An example of the system architecture analysis is given.
NEW TECHNOLOGIES IN EDUCATION
AUTOMATED PREPARING OF MATHEMATICAL TASKS BY THE PARAMETER VARIATION METHOD Evgeniy Kostyuchenko
The article deals with the methodological aspects of the automatic parameters selection in the preparing of standard tasks in mathematics. As a consequence, the requirements for automated technical system are formulated necessary from the point of view of mathematician-methodologist. The considered approach can be used in other disciplines with the similar formalization of the control and measuring materials.
PHOTO DESTRUCTION OF SILVER NANOPARTICLES IN PHOTO-THERMO-REFRACTIVE GLASS Ignatiev Dmitriy A, Ignatiev Alexander I , Nikonorov Nikolay V.
Silver nanoparticles destruction process in photo-thermo-refractive glass under nanosecond pulsed laser irradiation (532nm) depending on exposure dose is investigated. It is shown that photo fragmentation of silver nanoparticles and formation of silver clusters as well as the photoionization of silver neutral atoms with their transition into ion state takes place under laser radiation.
OPTICAL-ELECTRONIC SYSTEM FOR EXPRESS ANALYSIS OF ORE DRESSABILITY FOR MINERAL RAW MATERIALS BY OPTICAL METHOD Artem A. Alekhin
The article deals with creation results of experimental prototype of optical-electronic complex, designed to assess ore dressability of mineral raw materials by optical sorting method.
ORGANIZATION OF LIBRARIES IN ALTIUM DESIGNER Kuznetsova Olga V, Romanova Eva B.
The structure of libraries in Altium Designer is described. Approaches to naming of library electronic components – conditionally graphic signs and slots- are offered. Advantages of recommended approaches application are described.
HYPER-LISTS APPLYING TO WEB-PORTAL DEVELOPMENT Bessmertny Igor Alexandrovich, Ekaterina Ponomareva
The paper describes the authors’ experience in hyper-lists technique applying of the MS SharePoint framework to a corporate web portal development. The key issue of the proposed approach is storage in hyper-lists not just the content of the web portal but also the configuration data. This significantly simplifies the maintenance of the web portal.