Showing papers by "Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan published in 2008"
25 Feb 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, an analysis of three specific processes of accumulating the train sets has been performed taking into consideration their varieties, and the calculation formulas for wagon-hours of such an accumulating according to each scheme are given.
Abstract: This paper is devoted to the problem of accumulating the train sets at a sorting station. An analysis of three specific processes of accumulating the train sets has been performed taking into consideration their varieties. The calculation formulas for wagon-hours of such an accumulating according to each scheme are given. The dependence between the train set accumulation parameter and the quantity of wagons in the train set that is departing from a station has been determined. It has been also determined the influence of the above mentioned parameter on the duration of lost time of wagons at a sorting station.
1 citations
25 Apr 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the authors show that the destruction of a railroad wheel is caused by formation of high local stresses produced by the inhomogeneous elastic-plastic deformation when the cyclic temperature change takes place during and after braking using brake shoes.
Abstract: The destruction occurrence in a railroad wheel is caused by formation of the high local stresses produced by the inhomogeneous elastic-plastic deformation when the cyclic temperature change takes place during and after braking using brake shoes.
1 citations
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, the authors propose an approach to improve the quality of the information provided by the users by using the information of the user's interaction with the service provider, such as:
Abstract: В статье рассматривается постановка задачи определения продолжительности зон H –характеристики с учетом свойств функции среднего числа отказов и функции интенсивности отказов. Постановка задачи сформулирована как задача на определение структуры.
1 citations
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: The possibility of determination of the required clearance widening by not on tables but on formulas is under consideration in this paper, where the possibility of determining the required widening widening by using formulas is discussed.
Abstract: The possibility of determination of the required clearance widening by not on tables but on formulas is under consideration.
1 citations
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, the influence of the increase of train speed on the consumption of power resources is investigated and the effect of the train speed increase on the power consumption of the railway network is discussed.
Abstract: Influence of the increase of train speed on the consumption of power resources is under consideration.
1 citations
25 Apr 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the authors propose an approach to deal with the problem of the lack of information in the context of data sharing. But this approach is limited to the following domains:
Abstract: В статье приведены теоретические основы определения напряженно-деформированного состояния глинистого массива с позиций теории вязко-упруго-пластической среды.
1 citations
25 Feb 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the results of research of influence of parameters of thermomechanical hardening on the structure, complex of physico-mechanical and service properties of hardened railway wheels are presented.
Abstract: The results of research of influence of parameters of thermomechanical hardening on the structure, complex of physico-mechanical and service properties of hardened railway wheels are presented.
1 citations
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the results of experimental estimation of functioning efficiency of the passive ripple filters of traction d.c. substations are presented and compared with the results obtained by the same authors.
Abstract: In this article the results of experimental estimation of functioning efficiency of the passive ripple filters of traction d.c. substations are presented.
1 citations
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, the technique for establishment of rational sequence of elimination of restrictions on train traffic speed is offered. But this technique is not suitable for the case of large numbers of vehicles.
Abstract: The technique for establishment of rational sequence of elimination of restrictions on train traffic speed is offered.
1 citations
25 Oct 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
1 citations
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this paper, the authors considered ways of power factor increase for electric drives installed at railway machinery repair enterprises with taking into account the specific conditions of technological processes, and the following problem has been considered:
Abstract: In this article the following problem has been considered: ways of power factor increase for electric drives installed at the railway machinery repair enterprises with taking into account the specific conditions of technological processes.
01 Jan 2008-Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport
TL;DR: In this article, the numerical estimation of the electric energy quality parameters of voltage on a current collector of the DC electric rolling stock is executed, where the current collector is equipped with a voltage sensor.
Abstract: The numerical estimation of the electric energy quality parameters of voltage on a current collector of the DC electric rolling stock is executed.