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 Âûïóñê 38
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- Kulba V., Kosyachenko S., Shelkov A. Methodology of research of railway transport safety problems
We consider methodological basis for research of railway transport safety problems, including: establishment of methodology of abnormal situations research and scenario generation for railway facilities (RwF) operation in abnormal situations, optimal scenario choice for RwF development, creation of common information space for Russian Railways to solve efficiently problems of transport safety management.
- Matiukhin V. Conceptual modeling of control processes for railway transport
General control problems of contemporary railway transport are considered, such as technological principle of control, real-time control, integral and intelligent control. The main conceptual approaches to development and design of control systems for railway transport are defined.
- Akhmetzyanov A., Bakhtadze N., Vlasov S., Devyatkov V., Maximov E. Management decision support based on intellectual processing and analysis of open joint stock company “russian railways” monitoring data
We suggest decision support techniques for production control and business process management of Open Joint Stock Company “Russian Railways”. The techniques are based on the indices’ dynamic predictive forecasting, simulation, and parallel computing. Potential of Radio Frequency Identification Technology (RFID) application for data mining in the transportation process is discussed.
- Dorofeyuk A., Dorofeyuk J., Mandel A., Chernyavsky A., Levin D. Up to date rail transport safety requirements and intellectual analysis technique to design expert-analytical model for condition of railway and right-of-way forecasting
We elicit contemporary transport safety requirements from the official strategy of “Russian Railways” Corporation and state the problem of forecasting railway and right-of-way condition. We employ expert-classification and expert-statistical analysis technique (including data classification analysis methods) to set and solve the problem. Algorithm of railway and right-of-way condition forecast relies on structural predicting method.
- Karkishchenko A., Grechuhin I. Statistical recognition of faces based on feature points geometry for transport security systems
We consider a formal statement of the face feature points construction problem in terms of statistical identification. The process of feature points construction based on the training set is described. The formal definition of statistical classes is given. We suggest a method for face identification using statistical classes and feature points. In conclusion the results of experiments and comparison with the known methods are given.
- Pavlov V., Umansky V. Design of decision support system for railway lines throughput assessment
We develop a decision support system for assessment of railway lines throughput on the basis of train movement simulation. We explain DSS functions, structure, typical usage scenarios, and provide the GPSS World (language for discrete-event processes modeling) code of the train movement simulation model. We consider functions of a web-based version of the system, describe details of the railway lines throughput assessment procedure, and explain software and hardware requirements.
- Khanychev V., Maksim M. Development of intelligent monitoring and situation control system for railway infrastructure objects protection from adjoining water area
We describe an intelligent monitoring and situation control system for security safeguarding of railway infrastructure objects from the adjoining water area. The system uses interconnected information came from optoelectronic and hydro-acoustic sensors.
- Yavna V., Kasprzhitsky A., Kruglikov A., Lazorenko G., Khakiev Z., Shapovalov V. Design stages of intelligent system for transport infrastructure monitoring
We develop data collection, processing and analysis methods for transport infrastructure condition assessment, which take into account its interaction with the rolling stock. Analytic methods combine express (real-time) and detailed (including laboratory tests of physical and mechanical properties of materials) diagnostic routines. These methods are used in computer simulations, which give estimates of critical regimes for typical infrastructure objects as well as the critical values of basic physical and mechanical properties of materials. These estimates form the basis of requirements for a transport infrastructure monitoring and management system.
- Ambartsumyan A., Branishtov S. Modeling train routes at passenger station
Planning problems for a large train station are considered. We propose a discrete event (DE) modeling of a railway station and methods of supervisory control. The main purpose of DE-modeling of a complex system is to study dynamics of a process as a sequence of events (language model). This model is very productive for many problems in transport systems with complicated structure, such as routing problems, platforming, scheduling. DE-model describes both the structure of a transport system and its behavior, it is determined by the language; the specification sets limits on behavior of a system, and a supervisor provides implementation of this specification. Separate modeling of structure, conditions and control reduces the complexity of algorithms.
- Kibzun A., Naumov A., Ivanov S. Bilevel optimization problem for railway transport hub planning
We suggest a mathematical model for railway transport hub planning. The model is based on a two-stage bilevel stochastic programming problem with quantile criterion, and accounts for competition with a road carrier. In the case of a single-direction road we obtain a deterministic equivalent of the original problem. In the case of no competition we suggest an approximate method for this problem. We also suggest a model for unknown competitor traffic volume assessment.
- Lazarev A., Musatova E. Integer formulations of freight train design and scheduling problems
We consider the problem of cars-to-train assignments, routing and scheduling, which is to minimize the weighted average time of transportation orders execution by consistently choosing the compound of trains, their routes from origins to destinations, and schedules. We offer the new integer problem settings to account for different cases of practical constraints.
- Kaplunov S., Valles N., Fursov V., Belostotsky A., Dubinsky S. Condition diagnostics of russian railway infrastructure constructions under intensive aerodynamic loads from high-speed trains
We implement a composite procedure on the basis of combined approach for modeling aerodynamic loads on infrastructure elements (station constructions and designs, pedestrian crossings, bridges and tunnels) at passage of high-speed trains. We develop and implement in specialized software powerful methods of viscous liquid or gas currents modeling for research of aerohydrodynamic loads on a movable body of varying shape, and for problems of body movement in the presence of aerodynamic forces.
- Karabutov A., Zharinov A., Ivochkin A., Kaptil’ni A., Karabutov (jr.) A., Ksenofontov D., Kudinov I., Simonova V., Mal’tsev V. Laser-ultrasound evaluation of longitudinal stress in rails
New laser-ultrasonic method for evaluation of residual stress in rails was developed. It is based on laser generation of sub-surface ultrasonic wave and its registration with piezoelectric transducer. The values of residual stress in rails are determined by measuring the velocity of the ultrasonic pulse. The laser-ultrasonic transducer which induces and registers sub-surface ultrasonic waves was constructed. We theoretically analyzed relation between ultrasound wave propagation velocity and the value of residual stress, and used these results to suggest and implement experimentally the method of absolute calibration based on formation of stress in a sample with the hydrotension device UNG-75.
Calibration allowed us to justify the linear dependency between relative velocity change (in the range of percent deciles) and applied tension/compression stress in the range of reversible deformations.
- Kolesnikov V., Myasnikova N., Zhukova Y., Builo S., Ivanochkin P. Diagnostics techniques for multilayer antifriction coating on rail side head
At the present moment a new system of lubrication is being tested: a side head of a rail is coated with a multilayer antifriction nanomodified film obeying property of blocking undesired segregation phenomena. We investigate techniques of condition monitoring for such coating. The method is suggested for catastrophic destruction danger diagnostics based on assessment of flow rate and detection of a large number of discrete frequencies in a spectrum of acoustic emission.
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