Showing papers by "Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan published in 2007"
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: The idea of increase the calculations exactness based on application of universal magnetic characteristic due to value variation of satiation factor is considered in this paper, where the authors considered the problem of increasing the exactness of calculation.
Abstract: The idea of increase the calculations exactness based on application of universal magnetic characteristic due to value variation of satiation factor is considered.
3 citations
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25 Oct 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: The analytical dependence of the time loss from the speed which limits train movement has been defined and the method to estimate this dependence has been developed.
Abstract: The analytical dependence of the time loss from the speed which limits train movement has been defined.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the authors considered issues of experimental research of thermal processes in the anchors of d.c. electrical motors in electrical drives of railway switching points and proposed a method to determine the temperature of winding anchor insulation by the value of its capacity.
Abstract: The article considers issues of experimental research of thermal processes in the anchors of d. c. electrical motors in electrical drives of railway switching points. It has been proposed to determine the temperature of winding anchor insulation by the value of its capacity. This method allows to increase reliability and accuracy ofd.c.electrical motors diagnostics.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, two ways of determining the spectral structure of random functions of the traction current and voltage on electric rolling stock current collectors are considered, and the interharmonic properties of consumed current on a tramcar with rheostatic regulation have been calculated.
Abstract: Two ways of determining the spectral structure of random functions of the traction current and voltage on electric rolling stock current collectors are considered in the article. As an example, interharmonics of consumed current and voltage on the current collector of a tramcar with rheostatic regulation have been calculated.
1 citations
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25 Apr 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the authors deal with the tasks of efficient use of fillers and reusable industrial materials in the concretes with strength less than 20 MPa, the solution of which provides savings of cement consumption.
Abstract: The article deals with the tasks of efficient use of fillers and reusable industrial materials in the concretes with strength less than 20 MPa, the solution of which provides savings of cement consumption.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: The method of calculation of probabilities of discontiguous cuts’ divisions on the switch points is developed and the researches as for connection these probabilities with the parameters of the trains are executed.
Abstract: The method of calculation of probabilities of discontiguous cuts’ divisions on the switch points is developed. The researches as for connection these probabilities with the parameters of the trains are executed. The researches also tackle the problem of the connection between the above mentioned probabilities and the construction of the hump neck.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: The characteristics of the distribution of the random value of time of cuts rolling in the conditions of the action of random factors are determined.
Abstract: There have been executed the researches of process of cuts rolling in the conditions of the action of random factors. There have also been determined the characteristics of the distribution of the random value of time of cuts rolling.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, a mathematical model for the automated definition of parameters of a rail circuit on electro-motive force in locomotive coils proportional to a current in rails was elaborated.
Abstract: The mathematic model, which is allowed us to give a scientific substantiation to the automated method of definition of parameters of a rail circuit on electro-motive force in locomotive coils proportional to a current in rails, was elaborated. The hardware-software complex was developed to realization of proposed method of definition of parameters of rail circuit. It is established on the base of car - laboratory.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: The opportunity of increase of speed of trains was considered due to a reorganization of the plan in borders of an existing earthbed in this article, where the authors considered the possibility of increasing the speed of the trains.
Abstract: The opportunity of increase of speed of trains is considered due to a reorganization of the plan in borders of an existing earthbed.
1 citations
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25 Apr 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, the authors give a brief analysis to the state of transport services market in Ukraine and propose measures of its improvement and propose a model for improving the performance of the transport service market.
Abstract: The article gives a brief analysis to the state of transport services market in Ukraine and proposes measures of its improvement.
1 citations
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01 Jan 2007-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, the authors proposed a method of an establishment of rational speeds of movement in view of change of a condition of objects in time by means of modeling process of operation of a railway as set of objects by use of functions of set.
Abstract: The method of an establishment of rational speeds of movement in view of change of a condition of objects in time by means of modeling process of operation of a railway as set of objects by use of functions of set is offered.