The new way of multirate adaptation is considered. The main idea is the filter ability to change the order of the filter automaticaly by the appropriate algorithm.
The power on the filter output consists of two components. The first one is caused by the impulse response truncation, and the other is caused by weights fluctuations in the adaptive processing. More weights contribute more noise in adaptive signal processing. The result of adaptive procedure is the choice of the best filter orders in every channel of the multi-channel structure.
The main interest of this investigation is in the adaptation of the multirate adaptive filter with the flexible structural self-organization.
Due to the use of dynamical order adaptation procedure in the subbands, it is possible to reduce the total amount of the computational operations without quality reducing. Beside it, decreasing of the filter orders in the separate channel promotes considerable increase of the signal-to-noise ratio in the output signal. These statements are approved by experiments with the equalization problem.
Different results of the computer modeling are supplied with proper comments.
Keywords: adaptation, filter, multirate, signal, dynamical, order
This paper outlines the implementation of computer model of second-order visual mechanisms that are specific to spatial contrast modulations, and represents the results of testing the model. Computer simulation is based on "Filter-Rectify-Filter" model with some important additions. The inhibitory parts of receptive field of simulated mechanism are non-selective to orientation and spatial frequency of texture elements. Texture modulated by orientation or spatial frequency does not reduce flank inhibition and does not activate the mechanism. Unmodulated texture also does not cause activation of the filter because the flanking inhibition will be equal to or exceed the excitation. However, increasing the contrast in the center and reduction it on the flanks leads to the activation of the second order mechanism.
Keywords: Second order visual mechanisms, image filtering, texture, spatial modulation, computer simulation
The work is devoted to the study of algorithms of control subsystem as part of the integrated onboard control system of the aircraft and used in the final part of the trajectory. Algorithms of control subsystems are synthesized on the basis of the theory of optimized delta-transformations of the second order using the principle of the inverted pendulum on a cart. The studies based on the simulation using the developed software model, allowed to estimate as the impact dispersion, and the contribution to it of various subsystems.
Keywords: terminal control, aircraft, on-board integrated control system, optimized delta transformation of the second order, autonomous short range radionavigation system, simulation, software model
The paper gives the definition of reversibility, which can be used in the theory of linear circuits. To determine the conditions of the processes in reverse sequence selected linear second order circuit containing two reactive elements L and C. For a linear circuit at the time of switching current (or voltage ) can be written as the sum of two components : compulsory and free. Conditions for reversibility constrained component current (or voltage ) can be obtained a corresponding change of parameters independent sources of electrical energy. For a free component of the reversibility of the process can be achieved by changing the signs of the circuit elements in such a way that the signs of the roots of the characteristic equation is reversed . This switching can be realized if all the resistors in the multipole synthesized based on analog - digital-analog elements.
Keywords: A reversible process, electrical circuit, current, switching, multipole, input impedance, the characteristic equation
An analysis of new methods and means for a mesurement of parameters of piezoelectric ceramic elements and materials is carried out. These methods and means are based on a digital principle of the construction of devices. An impuls with a linear frequncy modulation therein is used as an signal for exciting. Results of experimental studies on this subject are represented for discussion.
Keywords: piezo ceramic element, piezo, methods and means of measurement, digital signal processing
The atricle considers the problem of finding the best carrier. It describes by the expert method of solving the problem, as well as an algorithm for selecting a carrier. Describes a software module implemented with the involvement of technology ActiveX, which greatly simplifies the process and reduces the development time of projects. The proposed application allows you to define a list of the best carriers, ranked by rating according to the user's request.
Keywords: Carrier selection, expert method, weighting coefficient, rank, user application
Reviews the basic content of the service for military purposes, as a separate type of services aimed at ensuring the military security of the state and playing a considerable role in both the military and civilian sectors of the economy. Based on the analysis of normative-legal documents of the Federal level proposed a definition of the services of military purpose. Classification of defense articles, defense services rendered under the state defense order in accordance with the modern paradigm of marketing services. During the study concluded that the set of services of military purpose has all the characteristics of services, which will continue to develop organizational and economic mechanisms of maintenance of innovative development of services in the field of military security.
Keywords: services for military purposes, the classification of military services, military security, organizational and economic mechanisms for the development of innovative services for military purposes
The dynamic problem of an anisotropic poroelastic plane under an influence of point source in the steady-state oscillation mode is studied. An analytical solution of the problem as a single integrals over a finite interval is given. Numerical experiments on the construction of solutions are made and the results are compared with the known classical solutions.
Keywords: poroelasticity, vibrations, anisotropy
Recently, BiFeO3 multiferroics have drawn a great deal of attention due to their superior ferroelectric properties in epitaxial thin film form in comparison to counterpart bulk single crystals or ceramics. In this work we present the results on magnetic properties of multiferroic ultrathin films (30-300 nm) of BiFeO3, (BiLa)FeO3 and (BiNd)FeO3 obtained by sputtering in transverse high frequency discharge, vacuum laser oblation and metalorganic chemical vapour deposition on monocrystalline substrates of (001) SrTiO3, (100) MgO and (100) Al2O3. The concentration of Bi, La и Nd in dodecahedral sublattices was varied. A novel effect of treatment of multiferroic films in a negative corona discharge has been investigated. It is demonstrated that the magnetisation may be increased by up to 35% whilst the change in is not noticeable. This effect does not depend on neither film composition no technological method.
Keywords: multiferroics, magneto-electric materials, methods of preparation, the films of bismuth ferrite, pseudomorphic structure, magnetic properties, corona discharge
For miniaturized vacuum klystron type devices utilization of a double- gap strip-line cavity with suspended ceramic substrate is very promising.
The two-mode operating mode of such cavities practically isn't studied enough; so there is the great scientific and practical interest for research of electrodynamic characteristics of cavities during multi-mode operation that correspond to simultaneous excitement of anti-phase and co-phase modes in a double gap.
In this article results of the 3-D numerical modeling by means of the Ansoft HFSS code are presented, and also the experimental results of the electrodynamic properties of the half-wave double- gap cavity with the suspended ceramic substrate are submitted. Optimum parameters of this design, allowing to carry out simultaneous excitement at multiple frequencies with frequency rate (K=2) are determined.
In such cavity high values of unloaded Q factors isn’t need because dielectric losses and conductor losses can be compensated at the expense of the negative electronic conductivity that brought by modulated electronic beam. The operating mode with frequency rate can be used for increasing of efficiency of generating and amplifying micro devices with filament cathode and matrix field emission cathodes.
Keywords: double-gap cavity, electrodynamic parameters, mathematical simulation, resonance frequency, characteristic impedance, method of planned experiment
At present, the development of algorithms is particularly relevant high-level analysis of video sequences, including tracking of objects in a video stream and their implementation in information and communication systems. In the proposed approach the pretreatment step uses optical flow calculation for each frame video sequence, as well as low-level features (such as a representation of each pixel in the color space YIU). For moving objects optical flow is more important than for a stationary background and allows you to find the foreground objects in video sequences and adjust the weighting function in determining the histogram similar to the adjacent frames, taking into account the motion of objects.
Keywords: computer vision, tracker, tracking of object, optical flow, motion tracking
The paper presents a method of detecting distortions in the archival photo documents by texture analysis based on local binary patternss. The proposed approach consists of the following stages: pre-treatment and detection of scratches. Pre-treatment is used to reduce the effects of noise and small defects in the image. To recognize the class of defects using a support vector machine. The effectiveness of the new approach on several examples in the detection of defects.
Keywords: digital image processing, detection of defects, archival photographs, local binary patterns
The paper proposes to perform quality control of the production work on the consolidation of soil foundation with the use of the method. Application of geo-radiolocation sensing allows to specify and complement the results of engineering and geological surveys, as well as capture the changes taking place in the grounds of foundations after work on fixing them. This will provide a comprehensive picture of the grouting in the underlying foundation of the building and provide a reliable and simple quality control work.
Keywords: Geophysical methods,monitoring of the geological environment, landslide hazard.
The synthesis of nanocomposite FeNi3/C based on the PAN, FeCl3 · 6H2O and NiCl2 · 6H2O, whereby the first time by the IR heating at 400 ÷ 700 ° C obtained nanocomposite FeNi3/C FeNi3 particle size of 10 to 80 nm are uniformly distributed UM. Using thermodynamic calculations based on the minimization of the Gibbs energy, confirmed the synthesis of nanocomposite FeNi3/C at T=400 ° C reduction of Fe and Ni with H2, produced during the process of carbonization of polyacrylonitrile with infrared heating. Designed as a nano material of the films can be effectively used as a carrier material for a magnetic information recording superdense. Recording density is achieved in such a carrier (85-100) Gb/dyuym2.
Keywords: nanocomposite, polyacrylonitrile, infrared heating, recording information, the magnetic properties, the carbon matrix
The main maintenance of a diversification of production as activity of subjects of managing is considered. being shown in purchase of the operating enterprises, the organizations of the new enterprises, redistribution of investments in interests of the organization and development of new production on available floor spaces. The most important organizational economic targets of a diversification of management are presented by innovative activity of the industrial enterprise.
Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production