Vol 14, No 1 (2013)
- Year: 2013
- Articles: 51
- URL: https://journals.eco-vector.com/2712-8970/issue/view/7673
Articles
4-7
Development of navigation filter for accuracy increase of coordinates of points of thermal images at remote diagnosis of overhead power lines
Abstract
In the article the authors offer an algorithm of navigation filter which makes possible to obtain the estimations of objects coordinates on the basis of the measured pseudoranges, obtained for signals of the co-located constellation of navigation satellites of GLONASS and GPS.
Siberian Aerospace Journal. 2013;14(1):7-10
7-10
Energy efficiency managment of communication channels
Abstract
The article considers questions of energy efficiency management of communication channels operating in a single communication system. The authors propose data transfer method in wireless networks that can be used for distribution of energy efficiency between communication channels of one communication system. The structures of transmitter and receiver are described. The authors describe a communication system of unmanned aerial vehicle where there is necessity to transmit low-speed telemetry data and to transmit high-speed payload data to ground control unit. The information of low-speed data source is modulated by QAM4 and information of high-speed data source is modulated by QAM16. Synthesized constellation is obtained by summation of QAM4 and QAM16. By adjusting the amplitude of QAM4 we can distribute energy efficiency between communication channels. The proposed method can be generalized for multichannel communication systems. Adaptive distribution of energy efficiency between communication channels allows to improve communication systems energy and spectral efficiency.
Siberian Aerospace Journal. 2013;14(1):11-15
11-15
Calculation of eigenvalues in the problem of unsteady heat transfer through a cylindrical wall with mixed boundary conditions
Abstract
With the use of analytical dependencies, the authors developed an analytical approximate method for calculation of eigenvalues in the problem of non-stationary heat transfer through a cylindrical wall with mixed boundary conditions on the inner and outer surfaces of the hollow cylindrical body. The authors prove that the high accuracy of the calculation can be achieved with the use of the available mathematical transformations, in other words, without resort to complex special Bessel functions.
Siberian Aerospace Journal. 2013;14(1):15-18
15-18
Research of boost converter with switch at zero current
Abstract
Methods of zero-current-switch boost converter control are analyzed in this article. Mathematical model of such converter is proposed. The authors show that the proposed converter under closed loop control has higher damping factor as compared with conventional step-up boost converter under the same conditions.
Siberian Aerospace Journal. 2013;14(1):18-23
18-23
Comparative analysis of edge detection methods for lines search on the basis of Hough transform method
Abstract
The method of Hough transformation for line detection is considered in the article. Methods of edge representation generation and their algorithms are described. Binarization algorithms of an image are presented. The comparative evaluation of methods of formation of edge representation for lines detection, with the account of various ways of binarization, is given. Results of the experiments, carried out under different conditions, are presented.
Siberian Aerospace Journal. 2013;14(1):24-30
24-30
30-35
Study of nonparametric models of dynamic systems
Abstract
The problem of identification and construction of models of stationary linear dynamic objects with delay in conditions of non-parametric uncertainty is observed. The goal of this work was to study models of dynamic objects of the high order. The problem of construction of a model of an object in a state characterized by non-zero initial conditions is considered. Duhamel and Cauchy-Lagrange integrals are used as models of dynamic objects. Non-parametric restoration methods of regression curves are used for construction of models of characteristics of objects. The results obtained demonstrate the possibility of construction of adequate quality models of stationary linear dynamic objects with delay in conditions of non-parametric uncertainty. The results can be applied in the field of automatic process control of production or processing and other fields, where tools for automatic control are used.
Siberian Aerospace Journal. 2013;14(1):36-40
36-40
Model of GERT-networks for different ways of usage of multi-version methodology
Abstract
This article describes different ways of application of multi-version methodology in the development of multi-version fail-safe software, and presents models of multi-version software architectures in the form of basic GERT-networks. With respect to the necessary and sufficient condition for the operation of multi-version module, the node with IOR input and output is selected to provide deterministic network section that describes the module. Formulas for calculation of probabilistic-time characteristics of multi-version modules, that provide fitness of GERT-network models to describe multi-version software, are presented. This allows to use the equivalent conversion and existing methods of calculation of GERT-networks.
Siberian Aerospace Journal. 2013;14(1):41-47
41-47
System of search, analysis and processing of multilinguistic texts, integrated with data retrieval systems
Abstract
Modern machine translation systems are considered, problems of the given systems are revealed, possible decisions are offered. The comparative analysis of six most popular systems is made, conclusions are drawn, on quality of their translation. The system of search, analysis and processing of multilinguistic texts, integrated with data retrieval systems of network Internet, is considered. The structure of the given system is presented, problems to be solved for its developing, are defined.
Siberian Aerospace Journal. 2013;14(1):48-52
48-52
53-56
Influence of network neurons number to network training and forecast accuracy
Abstract
The authors analyze neural network training error dependence on the neurons number. The effect of hard deterioration of training and forecast parameters at some values of neurons number has been found, which can be connected with entry conditions influence, bringing the casual component in the initial configuration of weight factors values of neural network.
Siberian Aerospace Journal. 2013;14(1):56-59
56-59
Method of selection of parameters reactive power compensation in traction ac networks
Abstract
The authors show a program for calculation of normal and resonant modes with a procedure of calculation of a network with nonlinear load on the example of traction substation, which allows, on the basis of the analysis of frequency characteristics of the input resistance Z вх = f(v), to appreciate the range of currents and voltages in the network elements, and to assess the levels of active losses and overloads of compensating devices with currents of higher harmonics.
Siberian Aerospace Journal. 2013;14(1):59-63
59-63
Group-theoretical analysis of Ni 5GeO 4(BO 3) 2 potential magnetic structures
Abstract
The work presents a group-theoretical analysis which makes possible to determine Ni 5GeO 4(BO 3) 2 crystal potential magnetic structures. The obtained information will help to analyze and interpret experimental data, while determining the true magnetic structure and the mechanisms of magnetic transitions in the compound being tested.
Siberian Aerospace Journal. 2013;14(1):63-68
63-68
Modal finite element analysis of shear flexible beams
Abstract
The author considers a problem of free oscillations of a beam with low value of transverse shear stiffness. On the base of Reissner-Midlin plate theory, the finite element of a shear flexible beam is developed. There are transverse shear strains among the basic kinematic nodal variables. The urgency of the model is shown by test modal analysis of beams. Vibrations of sandwich beams and thick layered composite beams under non-classical boundary conditions are investigated.
Siberian Aerospace Journal. 2013;14(1):68-74
68-74
Structure of the infinite sylov subgroup in some Shunkov groups
Abstract
The author studies groups entered by V. P. Shunkov in 1975 and named in his honor Shunkov groups in 2000, for the study the author uses a technique of infinite groups, developed at Krasnoyarsk School on group theory. The aim of the work was to establish the structure of an infinite Sylov 2-subgroup in Shunkov that does not have an almost layer-finite periodic part, when the normalizer of any finite non-trivial subgroup has an almost layer-finite periodic part. The author proves that if a Sylov 2-subgroup of the group is infinite, then it is an extension of a quasi-cyclic 2-group by reversing automorphism. This result will be used in the study of infinite groups with finiteness conditions. The structure of the unknown infinite Sylov 2-subgroup was completely revealed.
Siberian Aerospace Journal. 2013;14(1):74-79
74-79
Current lines for Prandtl solution
Abstract
The authors consider plasticity equations in a stationary two-dimensional case. For Prandtl solution, which describes the compression of plastic layer by rigid plates, the authors consider two velocity fields. The first one is Nadai solution, the second one is the new solution. The authors prove that the current lines in these solutions coincide. Based on the principle of maximum dissipation, the spheres of usage of these velocity fields are defined.
Siberian Aerospace Journal. 2013;14(1):79-81
79-81
82-86
Model of analysis of distributed computing systems reliability
Abstract
The paper presents a model of reliability analysis of distributed computing systems with client-server architecture. The proposed model allows to obtain correlation between reliability parameters of distributed computing system without any assumptions about the random variables distribution laws and the number of system elements
Siberian Aerospace Journal. 2013;14(1):86-91
86-91
91-96
96-100
Secure access to video conference systems
Abstract
The authors present vulnerability analysis "buffer overflow " for software and hardware complex “The label of privileges”. By the CVSS procedure the metrics based vector is constructed, and its components characterize the level of security of the algorithm. Based on these results the authors suggest to modify the existing algorithm.
Siberian Aerospace Journal. 2013;14(1):100-103
100-103
Estimation of the form of a large-sized transformed reflector surface for a spacecraft
Abstract
This article offers a methodology of estimation of a spacecraft large-sized transformable reflector surface form, which allows to define the basic geometrical characteristics of the reflector, such as the focal point deflection and the focal axis deflection, zoom effect of paraboloid of the best fit for a deformable reflector surface, as well as the mean-squared deviation of the points which circumscribe the reflector surface.
Siberian Aerospace Journal. 2013;14(1):106-111
106-111
111-114
Feature of development of “intelligent” constructions of shapeand dimension-stable structures of space vehicles from dielectric polymer materials
Abstract
The paper presents methodology aspects which are the basis for development and design of “intelligent” shape- and dimension- stable structures of space vehicles, made from dielectric polymer materials. Problems of mathematical simulation of such systems are considered, along with approaches connected to experimental investigations of such materials and systems. Methodology of design of “intelligent” structures made from dielectric polymer materials is developed.
Siberian Aerospace Journal. 2013;14(1):114-118
114-118
118-122
Guestions of development of a standard program of certified tests of electric radio products of foreign manufacture applied in domestic spacecrafts of long functioning
Abstract
Problem questions of application of foreign electric radio products, problems of certified test operations, foreign levels of quality of integrated chips of foreign production, as well as questions of development of a standard program of certified tests of foreign electric radio products are considered.
Siberian Aerospace Journal. 2013;14(1):122-125
122-125
Rate making and development of spacecraft onboard equipment to mechanical environment
Abstract
The article considers the problems appearing at rate making and development of spacecrafts onboard equipment of unpressurized type of enclosure on mechanical excitation. Proposed approaches are able to generate test environment of onboard equipment, on the basis of results of measurements at different stages of spacecraft testing, and implement them at the stage of autonomous development of on-board equipment.
Siberian Aerospace Journal. 2013;14(1):125-129
125-129
Technigue for tuning of adaptive phased antenna array of navigation equipment of GLONASS customer
Abstract
The authors consider an adaptive phased antenna array with original equal amplitude distribution and appreciate the efficiency of the algorithm of its adaptation with the use of the basis in the form of partial basis of exponential Fourier series in comparison with the optimal algorithm.
Siberian Aerospace Journal. 2013;14(1):130-134
130-134
Airplanes functional systems reliability calculation method
Abstract
The authors consider a method for systems reliability calculation, with allowance for recovery, and show the structure of formation of mathematical model of time, until simultaneous failure of two and three aggregates in a recoverable system.
Siberian Aerospace Journal. 2013;14(1):134-136
134-136
Research of stress-strain condition of working body of the machine for removal of oxide film from surfaces of aluminium ingots
Abstract
In the work the authors present the results of stress-state simulations analysis of the machine for removal of oxide film from surfaces of aluminium ingots. The presented technique of analysis can be used for analysis of stress-strain states of working bodies of machines, operating at high temperatures, by the method of finite elements.
Siberian Aerospace Journal. 2013;14(1):138-141
138-141
Choice criteria for constructive decisions of optimum low-polar linear induction machines
Abstract
The review of approaches to designing of low-polar linear induction machines of metallurgical appointment is carried out. The choice criteria of constructive decisions and schemes of machine turning on, received on the basis of multiple calculations and mathematical modeling of electromagnetic modes in the environment of Ansys Multiphysics are shown. Variants of priority designs during optimization are correlated to areas of the preferable geometrical sizes and technical parameters of inductors LIM.
Siberian Aerospace Journal. 2013;14(1):142-146
142-146
Cluster model of martensitic transformations in the alloy Fe 86Mn 13C
Abstract
Fe 86Mn 13C alloy has unique mechanical, electrical and magnetic properties due to the special modulated structure. Due to the combination of these properties in thin films, we study Fe 86Mn 13C as a possible material for spintronics problems. The results of electron diffraction patterns transcripts obtained from the alloy films Fe 86Mn 13C are presented in the article. The films were cryomechanicaly processed. The authors show that deformation martensites observed in the films has structure characteristics similar to the characteristics of alloy Fe 86Mn 13C. The authors offer a model of structure formation of deformation martensites in the form of self-organization of clusters in the transition of FCC-BCC structures under the influence of criomechanical processing. The inhomogeneous structure of the cluster causes the effects of magnetic aftereffect in the investigated materials.
Siberian Aerospace Journal. 2013;14(1):146-149
146-149
149-152
Theoretical research of sorption of atoms of lithium on carbon nanostructures
Abstract
In the work the authors present theoretical research of various carbon nanostructures (fullerenes, defects of the carbon planes) as potential material for production of anodes in lithium - ion batteries. Processes of sorption of atoms and lithium clusters in the volume and on the surfaces of these materials are considered as well.
Siberian Aerospace Journal. 2013;14(1):152-158
152-158
Heat capacity, thermal expansion and caloric effects in ferroelectric-ferromagnetic composite 0.82(PbTi 0.3) - 0.18(La 0.7Pb 0.3Mn0 3)
Abstract
Heat capacity and thermal expansion measurements on ceramic composite 0,82(PbTi0 3) - 0,18(La 0,7Pb 0,3Mn0 3) were performed at a wide temperature range. The cross impact of ferroelectric and ferromagnetic components on electro-, magneto- and barocaloric efficiency of the material was studied in phase transition regions.
Siberian Aerospace Journal. 2013;14(1):159-162
159-162
Antagonism of phases in multi-component mixtures
Abstract
The phase composition of multi-component systems is analyzed. In the process of the study the effect of phase antagonism was observed, the effect revealed itself in the form of correlation between the percentage composition of individual phases in a multi-component mixture, with the percentage composition of the other phases remaining almost unchanged. On the basis of experimental studies, the examples of such phases in multi-phase mixtures are pairs of monoclinic pyrrhotite and somolnokit, goethite and troilite, hexagonal pyrrhotite of different composition and monoclinic pyrrhotite.
Siberian Aerospace Journal. 2013;14(1):162-166
162-166
Thermistor thermometry
Abstract
In the article we consider the problem of thermistor thermometry and increase of accuracy of such measurements. Such accuracy increase is achieved by means of temperature being attached to the inflection point T inf of functional dependence of the logarithm of thermistor resistance, and the account of the timing drift of expansion coefficients.
Siberian Aerospace Journal. 2013;14(1):167-172
167-172
Assessment of coagulation influence on index of purification of water from metal ions
Abstract
The article presents the results of experimental studies of water purification, consisting of passing through it asymmetric alternating current with application of insoluble heterogeneous electrodes, introducing coagulating agent and settling.
Siberian Aerospace Journal. 2013;14(1):172-174
172-174
Features of electro-discharge-chemical machining with vibrating electrode-tool
Abstract
In the paper the authors present estimation of speed of connection and disconnection of electrodes in the process of their contact in each oscillation period. Physical effects occurring in the changing electrode gap are considered. Expressions for calculation of the parameters of surface roughness are presented. The results of the experiments are offered.
Siberian Aerospace Journal. 2013;14(1):175-177
175-177
Loss of cutting ability of metal bound diamond wheels at grind of composite materials
Abstract
The article dwells upon the reasons of loss of cutting ability of metal bound diamond wheels in different conditions of grind of composite materials. The attention is paid to detection of deficiencies of traditional methods of diamond grind, which in most cases do not allow to reach the requited quality of composite materials processing. The researches were performed with the use of methods of raster, optical microscopy and interferometry. The problems under discussion and methods of their solution are directed to technological advancement of machine-building enterprises, for the purpose of rise of profitability and capacity of processing, as well as quality assurance of items made of composite materials.
Siberian Aerospace Journal. 2013;14(1):178-183
178-183
Analysis of stock market state theories
Abstract
The authors carry out analysis of classical stock market state theories, define their analytical opportunities and allocate the unresolved problems and make a conclusion that none of the stock market state theories considers its internal arrangement, which is a key to its correct understanding.
Siberian Aerospace Journal. 2013;14(1):186-190
186-190
International market of educational services as the sphere of interests of Russian higher school
Abstract
The article considers actual problems of integration of Russian higher school into the world educational space. The authors give full determination of international market of educational services and analyze the basic problems, which home VUZes (Institutes of Higher Education) face in the process ofjoining the global market.
Siberian Aerospace Journal. 2013;14(1):190-196
190-196
Instruments for analysis of effective use of intellectual capital in the conditions of innovative economy at the enterprises of the rocket and space complex
Abstract
The author presents the analysis of the current state of science-driven enterprises, defines the ways of development of competence at the enterprises and offers the technique for estimation of economical efficiency of the strategy of intellectual capital development at the enterprises of the rocket and space complex.
Siberian Aerospace Journal. 2013;14(1):196-201
196-201
201-206
The methodology of managemental effect and the scientific concept of reforms in the national economy of Russia
Abstract
The paper shows that Russian economy has particularly acute need to increase the share of advanced competitive products in the annual product and to make changes in the industries producing these products by replacing the fixed assets involved in the sector of the economy, involving highly professional management, etc. In this regard, practically important becomes scientific search for new approaches to the conceptual basis of management of reforms in the national economic system, aimed at innovative transformations of the economical structure developed in the previous period and the reproduction ratios of the national economy. The author offers new variants of the management of reforms require development of new methodologies and instruments for solving actual problems.
Siberian Aerospace Journal. 2013;14(1):206-211
206-211
Toolkit of planning and automated control of balance of material resources in logistical systems of the industrial enterprises
Abstract
The author considers technique of making out a balance of material resources and control of material and cash flows on the example of mining on the basis of activity networks and materials norm costs control according to uniform arrays of the input data, as far as statistics is accumulated.
Siberian Aerospace Journal. 2013;14(1):211-217
211-217
Peculiarities of the innovative developments of the educational complexes
Abstract
The article describes peculiarities of innovative development of educational complexes in formation of strategies and tactics for innovative development in the Russian Federation. The theories of formation of educational-scientific-innovative complexes on the base of educational institution are presented. Reorganization of Universities into Innovative Universities, which meet the needs of the modern society, is estimated. The authors prove practicability of creation of educational scientific innovative complexes on the basis of higher educational institutions, since it will give the opportunities to quicken the process of modernization of higher-technological elaborations in all spheres of Russian economy in the future with the help of active reduction in practice and carrying forward the products of the scientific-technical and innovational activities.
Siberian Aerospace Journal. 2013;14(1):218-220
218-220
Principles of formation of regional innovative infrastructure
Abstract
The author describes the role and importance of innovative infrastructure in the development of regional economy and principles of its formation: priority development of effective subjects of innovative infrastructure, use of instruments of horizontal and vertical integration, compliance to the environmental conditions and account of typology of implemented innovations, use of not only regional, but branch and technological principle as well, and application of complex approach to formation of set of subjects of the infrastructure.
Siberian Aerospace Journal. 2013;14(1):221-223
221-223
Integrated management as a component of quality assurance system in production of welded metal constructions
Abstract
The article considers problems and principles of integrated management of welding process and participaive technologies from the standpoint of international standards. The authors describe the schemes of formation of uniform policy of an organization in the sphere of quality and comprehensive scheme of the process approach QMS and plan of development of IMS.
Siberian Aerospace Journal. 2013;14(1):224-230
224-230
Compliance as a function of anti-trust policy of subjects in investment and construction activity
Abstract
The authors reveal the basis of formation of compliance policy in investment and construction companies, describe the main problems and mechanisms of the compliance function realization in management of subjects of investment and construction complex. Along with this the authors suggest a formalized structure of commercial policy of subjects of investment and construction complex.
Siberian Aerospace Journal. 2013;14(1):231-233
231-233