Vol 20, No 4 (2012)
- Year: 2012
- Articles: 33
- URL: https://journals.eco-vector.com/1991-8542/issue/view/1178
Articles
Development of organizational structure of the vertically integrated telecommunications agency and telecommunications on JSC Rostelecom example
Abstract
Organizational structures of the vertically integrated telecommunication enterprises are considered. Expediency of reorganization of JSC Rostelecom, and creation of two federal branches is shown: «multinetwork» and «multiservice»
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):6-11
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Integrated assessment of the machine-building production operational calendar plan
Abstract
The paper introduces several indices for the integrated operational and calendar production plan assessment: deviation from the resource management uniformity, rhythmicality coefficient, duration of one revolution of labor costs, need for operating assets. The paper represents the general approach to the analysis of alternative variants of calendar production plan on the basis of multi-objective optimization principles.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):12-18
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Self-adapting algorithms for elimination of static errors in automatic linear and self-oscilating non-linear systems of the dynamic objects stabilizing
Abstract
The paper is the analysis of self-adapting control algorithms that provide the elimination of static errors in linear systems as well as symmetry of self-oscillations towards the demanded points in non-linear self-oscillating systems with nonsymmetric restrictions to control actions and with permanent perturbances.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):19-24
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Methods of formation of knowledge in informationsystems analysis of the transport infrastructure of the region
Abstract
Proposed a system model of expertise development of regional transport infrastructure, in particular the construction of development projects, with a view to supporting the regional authorities. This model allows us to describe the interaction of regional governance, the project under consideration of transport infrastructure and the prevailing socio - economic conditions in the region. Describes the formation of the model of road transport network based on data and knowledge gained from the analysis of road transport activities.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):25-30
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Analitical identification of spatiotemporal control in the inverse thermal conductivity problems on the basis of modal description
Abstract
The problem of identification of the spatiotemporal function of internal heat sources in the inverse thermal conductivity problem is solved. Representation of the control action is based on the modal description in the form of the infinite expansion in terms of orthogonal system of eigenfunctions; the coefficients of this series are temporary modes. Searching for the desired control is reduced to the independent identification of restricted set of temporary modes, linear combination of which provides the approximation of the specified temperature state.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):31-38
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Software and analytical tools for multicriterial evaluation of scientific research efficiency
Abstract
This paper discusses the issues of the creation and use of software and analytical tools for multi-criterial evaluation of the effectiveness of scientific research carried out in Samara State Technical University
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):39-45
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Synthesis of time-optimal control system of the induction heating processes with interval of uncertainty characteristics of the object
Abstract
The problem of optimal time control systems synthesis with interval of incompletely characteristics of the object models with distributed parameters is considered. Synthesis of optimal controller of induction heating process was performed and structure identifier parameters of characteristic control object was proposed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):46-57
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Transport network evolution model of the urban area
Abstract
The object-oriented models describing basic concepts of a subject domain «Organization of road traffic», such as a street-road network of city, transport stream, control of a transport stream are introduced. The above taxonomic models are used to set up a computer aided traffic control system.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):58-65
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Raw material placing management on processing plant
Abstract
The paper deals with the problems of ensuring the complete raw material processing in terms of its preliminarily placing at the purveyance stage. The paper gives the theoretical substantiation of the strategy of rational placing of incoming raw material batches at the plant storage facility. The paper also suggests methods of optimal selection of save place for every raw material batch based on this strategy.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):66-72
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Fuzzy optimizing of transfer air transportation system parameters
Abstract
Based on fuzzy set theory the problem of flight timetable optimizing taking account of aircrafts ground handling activity network parameters for hub-and-spokes system is solved. The model example of a problem solution is considered.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):73-80
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Criterion sets of assessments of an investment portfolio management quality with various criteria of risk
Abstract
The issue of modeling and analysis of criterion sets of portfolio management quality assessments is considered. The various risk criteria are investigated. The analysis is carried out for portfolio models with Markowitz's and Black's constraints, and also the Russian legislation constraints for qualified and non-qualified investors.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):81-89
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Double-loop control system by generalized parameter
Abstract
Use of correcting and intercontour circuits with application of various kinds of correction and regulators in double-loop control system by generalized parameter is considered. Various methods of intercontour connection optimization are investigated.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):90-97
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Synthesis of fir digital filters for solving signal reconstruction using criteria of moments
Abstract
The method of constructing the inverse digital filters for solving inverse problems of reconstruction of signals based on an approximation approach. The criterion used criterion of moments.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):98-105
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Test methods using for increasing of rotary viscometers accuracy
Abstract
Accuracy increasing of rotary viscometer is considered. Test methods using for accuracy increasing are suggested.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):106-110
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The increase of measurement’s accuracy of parameters of capacitor gauges due to change of the configuration of measuring circuit
Abstract
Updating of a measuring circuit is offered at realization of a method of measurement of parameters of capacitor gauges. Results of the analysis of an error of the method caused by a deviation of real transient from incorporated in model are resulted.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):111-115
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Method for multiple detection of separation combined chromatographic signals
Abstract
The article focuses on the task of forming a multi-dimensional signal in the chromatographic multidetector system. The article deals with the requirements eligibility criteria for the signals of detectors. An algorithm for processing multi-channel signals in order to improve the reliability determine the qualitative composition of complex multicomponent mixtures.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):116-122
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Determination of fracture toughness of small-size chevron-notched specimens with ultra-fine grain structure
Abstract
A new method for determining crack toughness of materials is described based on test data of small-size chevron-notched specimens in terms of commercial titanium BT1-0 and titanium alloy BT6 with ultra-fine grain (UFG) structure, obtained by methods of severe plastic deformation (SPD). A problem of separating a part, connected with variations in specimen ductility under crack propagation, of the total displacement of load application point, is solved. Equations to calculate specific fracture energy are obtained. The calculated values of stress intensity factor K Ic are in good agreement with known test data of standard specimens.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):123-129
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The role of components transfer at the aerosol production composition combustion
Abstract
A review of the transport of components of the heterogeneous systems combustion is given: diffusion, gas-transport reactions, convective motion, the role of melting, evaporation and gasification. The process of producing an aerosol in a combustion mode of pyrotechnic compositions is described. The necessity of solving the problem of obtaining submicron and nano-sized aerosols is shown.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):130-135
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Angular accuracy of profile links
Abstract
Discusses the method of determining the angular accuracy of profile joints with gaps and transitional plantings. Identifies areas requiring special profile control of precision in manufacture. Influence of errors of the profile on the angular precision of the connection.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):136-143
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Welding influence to the mechanical properties of dualphase steels
Abstract
The mechanism of dualphase steels unstrengthening during welding operations is investigated. Mechanical properties of dualphase steel welding joints is determined experimentally.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):144-149
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Mathematical model of electromagnetic field of the multicircuit overhead power line wire operating at stationary mode
Abstract
The paper deals with the problem of mathematical modeling and analysis of quasi-stationary processes in multicircuit overhead power transmission line in a field setting. The paper lists the analytical expressions for determining the components of strength vectors of the magnetic and electric fields at every point.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):150-154
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Mathematical model of the electric arc
Abstract
The paper describes the model with the changing length and cross-section developed within integrated dynamic models of an electric arc. The research shows that it is rational to use arc models with changing geometrical sizes when designing contact-switch systems of switching devices. The paper provides the statistical justification of adequacy of the arc model developed.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):155-162
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Identification of the mathematical model of the induction heating system in plastics moulding
Abstract
The paper performs the research of electromagnetic and thermal fields in the induction system for the plastics production. The paper also lists the results of calculations based on the numerical model. Mathematical model of the induction heater is developed in order to solve the problem of designing the induction systems for injection molding machine
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):163-167
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The efficiency use of a reserv phase on overhead transmission lines 110-330 KV
Abstract
The use of a reserve phase will increase the reliability to power supply, allowing to prevent accidents caused by the single-phase short circuit, and planned outages caused by fuse of the glaze-wind depositions and partially renovated overhead lines. There was did the economic assessment of the use of a reserve phase. The authors present an economic assessment of using a reserve phase.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):168-172
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Increasing of response time of the servo drive with the synchronous motor
Abstract
The structural diagram of the servo drive with the synchronous motor is developed, allowing to increase its response time. Analytical expressions for calculation of parameters of the regulators providing the unidirectional approach to the set coordinate in a combination with small time of transients are received.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):173-181
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Quality research of the way the car antenna is ground to the level of induced radiointerference
Abstract
The paper performs the quality research of the way the car antenna is grounded to the level of electromagnetic interference generated by on-board sources. On the basis of this research the optimal shape of the contact surface between the cable and the car body was defined.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):182-188
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Mathematical simulation of electric fields multielectrode electro-capacity converters at cross – through-flow sensing
Abstract
The paper consider computation of electric field s and parameters multielectrode electro-capacity converters moisture meters of oil in the cross – through-flow sensing. The analytical expressions for the potentials and the components of the electric field in the control zone are obtained.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):189-197
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Transfer functions of heat exchanging process in air-cooling unit of oil
Abstract
The mathematical model of heat exchanging process in air-cooling unit of oil is considered. The linearized block diagram of heat exchanging process as object of control is developed. Transfer functions of object in relation to changes of the volume expense of cooling air and oil and air temperatures on a device input are found.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):198-205
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Optimal control of the manufacturing building magnesite beam based on tree organic waste
Abstract
This paper describes the search for the optimal control action on a mixture of wood in the manufacture wall beam from woody organic waste. The application of the maximum principle, which measures the value of the control actions U for wood blend as best for speed and at the same time providing the greatest stability region.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):206-214
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Calculation the radius of the rolled inserts in during process of repair steel tanks manufacturing by method of rolling
Abstract
In this work provides descriptions mathematic modeling of the repair operation which prevent appearing dents in the wall of the rolling vertical steel tanks for the storing oil. The dent in the wall appear in during eliminate such defects as the awkward, the impermissible wall’s deviations, the dents, the elimination unprotect constrictions with method exchange the part of the wall by rolled leafs with project radius of the tank, which have not inner stress [1].
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):215-220
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The analysis of the method of measurement of parameters of harmonious signals on instant values of their orthogonal components
Abstract
The method of measurement of integrated characteristics on instant values with use of orthogonal making harmonious signals is investigated. Results of the analysis of an error of the method caused by a deviation of a real signal from harmonious model are resulted.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):221-225
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Reduction of electrical energy losses in the high-current connections with plastic electroconductive materials
Abstract
The way of reducing power losses in high-contact connections are transient decrease in resistance by applying a conductive material contact surfaces. Investigate the electrically conductive material, composition, method of manufacture, the results of use.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):226-229
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The synthesis of methods of measurement of integrated characteristics on instant values of orthogonal making harmonious signalS
Abstract
Classification of methods of measurement of integrated characteristics by instant values with use of orthogonal harmonious signals is considered. The new approach to the synthesis of such methods is offered. Four methods synthesized on the basis of the given approach are examined.
Vestnik of Samara State Technical University. Technical Sciences Series. 2012;20(4):230-234
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