The paper is concerned with an investigation of a problem of software debugging aimed for a special-purpose computer meant for operating transport facilities in the actual time mode. The proposed approach allows forming of the synchronized flow of commands and data as a data memory file for the scruting program. An evaluation method for the analysis of the effectiveness of the proposed solutions, taking into account the complexity of the hardware and software debugging tools, is also presented.
The paper contributes to a vital problem of enhancement of efficiency of the interval regulation of the traffic working including the modeling of the traffic working and spacing out the block sections. The procedure of step-by-step train movement modelling and the algorithm of the block sections spacing out are investigated.
The paper is concerned with a problem of the reasons and consequences of state redemption of Russian railways in the last quarter of the XIX century and the associated factors, in particular funding sources, profit growth rates and expenses of the national railways. The profit made by the private railways both for passenger and goods carriage exceeded that of the state railways. Russia invested more funds into railway building, and the investments were more effective compared to other countries. The railways reorganization in Russia was followed by intensification of industry development, but the insufficient level of the national economy development resulted in overexploitation of the national railways.
This paper contains investigation of the problem of safe transportation of the particularly dangerous goods. The particularly dangerous goods selection criteria is presented. Then a mathematical model allowing the evaluation of facilities sufficiency for prevention of the emergency situations on the railway transport system, is given. Finally, basic ideas of interaction between the systems of the railway transport and the national emergency are discussed.
V.N. Pupynin, L.A. German
The drawbacks of currently used algorithm of 27.5 kW feeder switch control on the alternating current traction substation, based on the “blind” repeated automatic switching on after switching off without investigation of the reasons which caused switching off, are analyzed. A modern algorithm of switch control by means of digital terminal, taking into account the reason of switching off before the circuit interruption, is proposed.
L.I. Mogilevich, V.S. Popov, E.I. Starovoytov
The problem of hydroelasticity in respect of an isolation pad with impermeable circular concentric walls is considered. The pressure distribution in the fluid layer located in the space between à vibrator and à stator is found. The amplitude phase and frequency curves are analyzed and the resonance frequencies are determined.
E.I. Skovorodnikov, S.M. Ovcharenko
The article is concerned with investigation of the diagnostics technique for a diesel engine by results of the spectral analysis of motor oil. Realization of the suggested technique is based on use of models of wear process of controllable parts of a diesel engine, accumulation of products of wear process in motor oil and an algorithm of division of products of wear process on controllable groups of parts.
Nguen Van Vi
The paper contains results of the statistical modeling of horizontal strain in a poling berth of piling type. The average of distribution and the deviation of the horizontal strain in the longitudinal and transverse bents are determined through statistical modeling based on the given variates of the elasticity modulus, moment of inertia and length of piles.
V.S. Feoktistov, O.V. Lomovskoy
The paper contains results of theoretical and experimental investigations of a cylindrical power unit with a shape memory function subject to external radial pressure. A highly effective technological process of a pipe insertion into the pipe plates of a heat-exchange unit by means of a special tool partly composed of the shape memory material is then developed.
The paper is concerned with the problem of economy of a working fan as a regulating device within the temperature regulation system of a diesel with a variation of the aerodynamic resistance of the cooling radiator sections. Some recommendations for optimal parameters of the fan within the whole working range of the cooling airflow are proposed.
Yu.I. Yudin, S.V. Pashencev
A problem of identification of the watercraft mathematical model is considered. The proposed identification approach settles from the well-known maximum principle formulated by L.S. Pontryagin. A proof is given establishing the application of the maximum principle to the typical watercraft mathematical model identification.