Relevant bibliographies by topics / Trains

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Trains'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 May 2025

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Journal articles on the topic "Trains"

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Adamu, A., J. Zhang, F. Gidado, and F. Wang. "An Investigation of Influence of Windshield Configuration and Train Length on High-Speed Train Aerodynamic Performance." Journal of Applied Fluid Mechanics 16, no. 2 (February 1, 2023): 337–52. http://dx.doi.org/10.47176/jafm.16.02.1433.

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The aerodynamic performance of four train models with different windshield configurations (i.e., internal and/or external) in three train marshalling modes (i.e., 3, 6 and 8-car groups) was numerically investigated in this study. The train's airflow characteristics at Re=2.25×106 were determined using the shear stress transport (SST) k- turbulence model. The results were validated by comparing the pressure distributions and drag forces on the streamlined heads with experimental data. The difference in windshield configuration and train length has a substantial influence on the train’s flow field and surface pressure distribution. For the trains with internal windshields, due to non-uniform geometry, the flow is separated and vortices are formed at the windshield area. The boundary layer profile increases with the increased train length, and its thickness varies with windshield configurations. Asymmetric vortices are formed in the wake at a distance close to the tail car’s nose, except for trains with external windshields. The reduction of the flow velocity as the train length increases causes a reduction of the low pressure near the tail car’s streamline transition, thus causing a decrease in the tail car’s drag and lift forces. Consequently, for trains with external windshields, the head car’s drag increases, whereas the total train drag reduces significantly as the train length increases. Therefore, employing external windshields in all the inter-carriage gap sections, irrespective of the train length, demonstrates a good ability to reduce future train’s aerodynamic drag.
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Chen, Kaixin. "The Research of the Fluid Dynamics of Trains." Highlights in Science, Engineering and Technology 37 (March 18, 2023): 299–308. http://dx.doi.org/10.54097/hset.v37i.6085.

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Trains have been the main means of transportation in the world for a long time. Therefore, the progress and design of trains has been a widely debated topic, and how to reduce the wear and tear of trains is a major aspect. There are many factors that can affect the resistance of a train as it moves. Including but not limited to Locomotive shape, the smoothness of the connections between the carriages of a train, the wheel axle and the adsorption device under the train and the train’s relative velocity with respect to air. This paper will study two main aspects of train fluid resistance. The first is the locomotive shape, that is, the effect of differences in the external shape of the train on the surrounding fluid. The other is the speed of the train, which is the influence of the relative speed of the train and the surrounding air flow on the surrounding fluid.
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Verbytskyy, Volodymyr, Vitaly Minakov, Yevhen Misko, and Oleksandr Razboinikov. "Analysis of the construction of a port-storm mathematical model of a articulated two-link road train regarding the vertical storage." Ukrainian Journal of Applied Economics and Technology 8, no. 2 (March 20, 2023): 165–72. http://dx.doi.org/10.36887/2415-8453-2023-2-24.

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The article considers possible ways of development and improvement of a flat mathematical model of the movement of an articulated two-link road train considering the track and bringing this model to a spatial model that could consider the change in vertical loads and the subsequent change in the lateral deflection forces, which affect the indicators of turning and controllability of the articulated vehicle. This article proposes constructing a spatial mathematical model of a two-link road train considering the vertical component. The authors consider the problems associated with the movement of a two-track train over uneven terrain and height differences that may occur on the track. They consider the gravitational force's influence on the train's movement and develop a mathematical model that describes this process. The article presents mathematical equations describing the direction of a two-track train in three-dimensional space. They consider the mass of the train, traction forces, air resistance, gravitational force, and reactions from the ground. The authors use numerical methods to solve these equations and conduct computer simulations to study train motion under various conditions. The results of the study demonstrate that the vertical component significantly impacts the movement of a two-track train. It can affect the train's speed, energy efficiency, and stability. The authors conclude with the need to consider the vertical component when building mathematical models of double-track road trains. This paper is essential for researchers and engineers developing and designing road trains. Considering the vertical part will help improve the accuracy of mathematical models and increase the efficiency of two-track road trains in actual operating conditions. The obtained results are essential for developing and improving control systems for two-track road trains, particularly in transport, logistics, and mobile robots. The proposed model can be used to optimize the traffic trajectory and improve the efficiency and safety of the operation of road trains in natural conditions. The proposed model is designed for circular stationary and transient modes of movement of an articulated road train with the possibility of conducting a comparative analysis with a full-scale experiment. Keywords: spatial mathematical model, circular modes, vertical oscillations, articulated train.
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Hyman, Mario, and Mohd Hasan Ali. "A Novel Model for Wind Turbines on Trains." Energies 15, no. 20 (October 15, 2022): 7629. http://dx.doi.org/10.3390/en15207629.

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Wind turbines that are consistently exposed to the air displaced by moving trains have a high potential for energy generation. Researchers have developed mathematical models to simulate wind energy generation from turbines on moving trains but there are significant gaps in the developed model theory. Most models do not consider the negative effects that additional aerodynamic drag, increased weight, and modified dimensions can have on the train’s operation. To overcome the drawbacks of existing models, this work proposes a novel approach of modeling the wind turbines on trains by considering wind turbine exposure only when the train is decelerating or stationary. There are no models that consider all of these realistic physical effects as a function of time. Real-time analysis and power-system simulations showed that the proposed model could produce over 3 MJ of net energy for favorable train trips. The simulated load profile met the demand of a 1 KW generator connected to onboard electrical components. Some recommendations on possible future research on wind turbines on trains are explained.
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Kuszmaul, William. "Train tracks with gaps: Applying the probabilistic method to trains." Theoretical Computer Science 899 (January 2022): 39–47. http://dx.doi.org/10.1016/j.tcs.2021.11.017.

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Shao, Jing Jing, Lei Shan Zhou, Zi Xi Bai, and Yong Feng Shang. "Determination of the Minimum Departure Interval between Trains with same High-Speed at the Relatively Initial Station." Applied Mechanics and Materials 587-589 (July 2014): 1737–40. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1737.

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Chinese high-speed railway is in a boom and making train diagram with high-density trains to relieve capacity intense and improve operational efficiency has become the research focus. Different kinds of station intervals between adjacent trains are the basis for the train diagram. According to the situation in which trains with different speed run on the same line and the proportion of high-speed trains is much larger than that of middle-speed trains, this paper raises principles and methods to determine the minimum departure interval between trains with same speed at the relatively initial station. The minimum departure interval between trains with same speed at the relatively initial station is a necessary and sufficient condition for making train diagram since there is no overtaking between same-speed trains.
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Li, Yongle, Jiangtao Deng, Bin Wang, and Chuanjin Yu. "Running Safety of Trains under Vessel-Bridge Collision." Shock and Vibration 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/252574.

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To optimize the sensor placement of the health monitoring system, the dynamic behavior of the train-bridge system subjected to vessel-collision should be studied in detail firstly. This study thus focuses on the characteristics of a train-bridge system under vessel-bridge collision. The process of the vessel-bridge collision is simulated numerically with a reliable finite element model (FEM). The dynamic responses of a single car and a train crossing a cable-stayed bridge are calculated. It is shown that the collision causes significant increase of the train’s lateral acceleration, lateral wheelset force, wheel unloading rate, and derailment coefficient. The effect of the collision on the train’s vertical acceleration is much smaller. In addition, parametric studies with various train’s positions, ship tonnage, and train speed are performed. If the train is closer to the vessel-bridge collision position or the ship tonnage is larger, the train will be more dangerous. There is a relatively high probability of running danger at a low speed, resulting from longer stay of the train on the bridge. The train’s position, the ship tonnage, and the train speed must be considered when determining the most adverse conditions for the trains running on bridges under vessel-bridge collision.
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Yang, Lu, Leishan Zhou, Hanxiao Zhou, Chang Han, and Wenqiang Zhao. "A Lagrangian Method for Calculation of Passing Capacity on a Railway Hub Station." Mathematics 11, no. 6 (March 15, 2023): 1418. http://dx.doi.org/10.3390/math11061418.

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This research paper proposes a Lagrangian method to address the passing capacity of the calculation problem (PCCP) for a hub station in a high-speed railway (HSR) system. The passing capacity of a hub station is critical for determining the train timetable and maximizing the number of trains that can operate on different lines. The objective of this study is to determine the maximum number of trains that can pass through, start at, or end at a hub station. To achieve this objective, a mathematical model was introduced to solve the PCCP. The model was decomposed into two parts using a Lagrangian relaxation algorithm. The first part of the model was a simple train arrival problem (TAP) that reflected the timing of trains at the hub station with simultaneous arrival and departure time constraints. The second part of the model was a train spatio-temporal routing problem (TSRP) that aimed to solve the shortest spatio-temporal path of trains with free conflict with the train’s trajectory. A real instance was provided to demonstrate the feasibility of the proposed approach and the effectiveness of the Lagrangian method. The results showed that the proposed method can efficiently solve the PCCP and maximize the passing capacity of a hub station in an HSR system.
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Vakulenko, S. P., and P. A. Kozlov. "Optimization of Locomotives’ Turnover with a «Labyrinth» System." World of Transport and Transportation 14, no. 4 (August 28, 2016): 92–104. http://dx.doi.org/10.30932/1992-3252-2016-14-4-10.

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The problem of rational use of locomotives is quite acute. Here it is necessary to find the best compromise. In case of excess of locomotives there are less delays of trains, but locomotive costs are higher. In case of insufficient number of locomotives the situation is reversed. A model for calculating the optimal modes of turnover of train locomotives serving train flow isтoffered. The model promotes the further development of the dynamic transport task. The parameters of trains movement and the use of locomotives are provided, work schedules for each of them are built. The impact of the number of locomotives on the train’s mobility is estimated.
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Hou, Tao, Li Tang, Hongxia Niu, and Tingyang Zhao. "Research on speed control of high-speed trains based on hybrid modeling." Archives of Transport 66, no. 2 (June 30, 2023): 77–87. http://dx.doi.org/10.5604/01.3001.0016.3132.

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With the continuous improvement of train speed, the automatic driving of trains instead of driver driving has become the development direction of rail transit in order to realize traffic automation. The application of single modeling methods for speed control in the automatic operation of high-speed trains lacks exploration of the com-bination of train operation data information and physical model, resulting in low system modeling accuracy, which impacts the effectiveness of speed control and the operation of high-speed trains. To further increase the dynamic modeling accuracy of high-speed train operation and the high-speed train's speed control effect, a high-speed train speed control method based on hybrid modeling of mechanism and data drive is put forward. Firstly, a model of the high-speed train's mechanism was created by analyzing the train's dynamics. Secondly, the improved kernel-principal component regression algorithm was used to create a data-driven model using the actual opera-tion data of the CRH3 (China Railway High-speed 3) high-speed train from Huashan North Railway Station to Xi'an North Railway Station of "Zhengxi High-speed Railway," completing the mechanism model compensation and the error correction of the speed of the actual operation process of the high-speed train, and realizing the hybrid modeling of mechanism and data-driven. Finally, the prediction Fuzzy PID control algorithm was devel-oped based on the natural line and train characteristics to complete the train speed control simulation under the hybrid model and the mechanism model, respectively. In addition, analysis and comparison analysis were conduct-ed. The results indicate that, compared to the high-speed train speed control based on the mechanism model, the high-speed train speed control based on hybrid modeling is more accurate, with an average speed control error reduced by 69.42%. This can effectively reduce the speed control error, improve the speed control effect and oper-ation efficiency, and demonstrate the efficacy of the hybrid modeling and algorithm. The research results can provide a new ideal of multi-model fusion modeling for the dynamic modeling of high-speed train operation, further improve control objectives such as safety, comfort, and efficiency of high-speed train operation, and pro-vide a reference for automatic driving and intelligent driving of high-speed trains.
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Dissertations / Theses on the topic "Trains"

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Shapochka, J. S., and N. O. Rudakova. "Maglev trains." Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/45488.

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Maglev trains are wonderful inventions that fly on air. They use magnets to levitate and propel the trains forward. There is no friction between the train and the track! The batteries can levitate the train for 30 minutes without any additional energy. Linear generators in the magnets on board the train use the motion of the train to recharge the batteries.
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Heirich, Oliver [Verfasser]. "Localization of Trains and Mapping of Railway Tracks / Oliver Heirich." München : Verlag Dr. Hut, 2020. http://d-nb.info/1220567655/34.

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Sakuma, Yutaka. "Dynamics of trains and train-like articulated systems travelling in confined fluid." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102162.

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The dynamical stability, wave propagation, response, and mode localization in a train of flexibly interconnected rigid cylinders travelling in a confined cylindrical "tunnel" subjected to fluid dynamic forces are studied theoretically. Each cylinder, which is coupled and supported by springs and dampers, has two degrees of freedom of translational and rotational motions. The kinetic, dissipation, and potential energies of the system and the generalized forces associated with the fluid dynamic forces acting on the system, such as inviscid fluid dynamic forces, viscous frictional forces, and form drag, are obtained first. Then the equations of motion are derived by application of the Lagrange equation. The principal aim of this study is to investigate the effect of aerodynamic forces on the dynamics of a high-speed train running in a tunnel, or more generally of a train-like system travelling in a coaxial cylindrical tube.
The results of this study show that (a) the system loses stability by flutter; (b) viscous frictional drag has a considerable effect on stability; (c) when the aerodynamic forces act on the train, the frequency bands of the dispersion relation of wave propagation shift, and thus no classical normal modes (standing wave solutions) exist in the system; (d) the wavelength of the travelling sinusoidal force controls phase differences among cylinders in the train: and (e) the imperfections in the supporting springs have a great influence on mode localization and considerably alter the stability of the system.
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Sheng, Xiaozhen. "Ground vibrations generated from trains." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395945.

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Ritteman, Thomas Arthur. "Grains, Trains and Aqua-Mobiles." Thesis, North Dakota State University, 2010. https://hdl.handle.net/10365/29633.

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Grain shippers are constantly faced with making merchandising and logistical decisions while trying to achieve a positive net margin. They have to decide how much grain to sell and when the most opportune time to do so occurs. In addition, decisions regarding how much freight should be acquired and where grain should be shipped need to be addressed. These decisions are met by several sources of risk such as futures spreads, basis levels, transit times, equipment placements, and farmer deliveries. The primary objective of this thesis was to develop a model to determine both the optimal amount of grain that should be sold in the pipeline and the optimal amount of freight that should be hedged by grain shippers through the use of forward shipping mechanisms. Certificates of Transportation (COTs) offered by the Burlington Northern Santa Fe (BNSF) Railway were used to represent forward shipping mechanisms in this thesis. A stochastic simulation model of a prototypical grain shipper containing three country elevators and two export facilities was developed. A sensitivity analysis was conducted on merchandising and logistical variables to evaluate different scenarios. The analysis revealed that committing to too many shuttle COTS limited the shipper's flexibility, forced sales to be made in suboptimal periods, and significantly increased the level of demurrage. The type of freight ordering strategy implemented by each elevator ultimately determined the overall sustainability of the firm; shippers need to diversify the type of freight they commit to because ordering too much long-term freight can result in bad sales decisions, whereas relying only on short-term freight is costly and inefficient. Not being able to quickly adapt to volatile market conditions can result in making bad selling decisions and untimely freight purchases which can hinder the longevity of a firm.
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Heinz, Wiktoria. "Passenger service times on trains." Licentiate thesis, KTH, Infrastruktur, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1657.

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Wong, Wing-sum Angela. "Possibility of the development of high speed train between Hong Kong and Mainland China." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31627699.

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Lopez, Cédric. "Méthodes d'optimisation des trains d'atterrissage d'hélicoptère." Phd thesis, Paris, ENSAM, 2007. http://pastel.archives-ouvertes.fr/pastel-00003600.

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De récentes études expérimentales sur des situations d'atterrissage d'hélicoptères à grande vitesse dit dur (vitesse supérieure à 2 m/s), ont révélé que de par l'effort structural transmis par les trains d'atterrissage couplés mécaniquement au fuselage, la poutre de queue d'un appareil dont le premier mode de flexion se situe dans les basses fréquences pouvait être excitée. Les oscillations de celle-ci génèrent des contraintes mécaniques au niveau de la liaison entre la cabine et la poutre de queue qui portent atteinte à la pérennité de la structure. Afin de lutter contre ce phénomène problématique, une solution passive consiste à rigidifier la liaison entre la cabine et la poutre de queue. Coûteuse en masse et interférente avec le bon fonctionnement des dispositifs anti-vibratoires dimensionnés en fonction des fréquences propres initiales de l'appareil, celle-ci peut être évitée par une optimisation de l'effort transmis par les trains d'atterrissage en agissant sur le comportement dynamique de ceux-ci. Fort de ce constat, les travaux de recherche présentés dans ce mémoire, concernent l'étude et le développement de méthodes d'optimisation passive et active des trains d'atterrissage en vue de minimiser les efforts supportés par la poutre de queue et induits par l'impact de l'appareil sur le sol. Basé sur une constante synergie entre les aspects théoriques et les aspects expérimentaux appuyés par le développement d'un démonstrateur, cette étude formalise tout d'abord la problématique lié aux atterrissages des aéronefs et se propose d'analyser la physique du phénomène des atterrissages via des outils de modélisation utilisant des approches analytique et multi-corps. Ensuite après une analyse et une identification des paramètres d'optimisation de la dynamique des trains d'atterrissage, des méthodes d'optimisation passive et semi-active sont développées et validées expérimentalement sur un démonstrateur mécaniquement équivalent à l'hélicoptère considéré pour cette étude.
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Pratt, Ian. "Active suspension applied to railway trains." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/27621.

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There has been an impetus in recent years to increase railway train speeds and reduce journey times. As train speeds have increased, other problems have manifested themselves, in particular the consequent deterioration in ride quality at these higher operating speeds. Improvement in suspension design is one option which can circumvent this problem. Suspension design for a modem high-speed train has hitherto been a heuristic procedure directed towards optimising the passive components of the suspension. Performance limits are now being reached with passive suspensions due to the inherent trade-offs which need to be made in the design process. Active suspension, which eases this inherent trade-off, has received a great deal of interest in both academia and industry over recent years. A number of theoretical and experimental studies have highlighted the potential benefits of active suspension technology. Theoretical studies have concentrated on using simple vehicle models and although providing the initial impetus to active suspension they have not given the industry full confidence in them. In contrast, experimental studies have highlighted a number of problems, most notably the significant effect actuators can have on the overall performance.
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Peter, Marco. "The future of night trains. : JIYUKŪKAN." Thesis, Umeå universitet, Institutionen Designhögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-79499.

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Books on the topic "Trains"

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Cooper, Jason. Trains. Vero Beach, Fla: Rourke Enterprises, 1991.

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Tiner, John Hudson. Trains. Mankato, MN: Creative Education, 2003.

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Johnstone, Michael. Trains. New York: Dorling Kindersley, 1995.

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Rogers, Hal. Trains. Mankato, Minn: Child's World, 2007.

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Megarry, Jacquetta. Trains. London: Kingfisher, 1985.

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Johnstone, Michael. Trains. New York: Dorling Kindersley, 1995.

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Rogers, Hal. Trains. Mankato, Minn: Child's World, 2007.

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Barton, Byron. Trains. New York: HarperFestival, 1998.

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Corporation, British Broadcasting. Trains. Princeton, N.J: Films for the Humanities & Sciences, 1997.

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Ian, Graham. Trains. Somerville, Massachusetts: Candlewick Press, 2017.

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Book chapters on the topic "Trains"

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Keppel, E. "Trains." In Acquisition, Analysis and Use of Clinical Transplant Data, 114–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-51003-8_8.

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Ahmadian, Amir, Angela E. Downes, and A. Samy Youssef. "Trains." In Encyclopedia of Otolaryngology, Head and Neck Surgery, 2845. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-23499-6_200116.

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Logan, Kathryn G., Astley Hastings, and John D. Nelson. "Trains." In Transportation in a Net Zero World: Transitioning Towards Low Carbon Public Transport, 51–58. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96674-4_4.

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Kapp, Tanja. "Oliver East’s Trains Are … Mint: Walking Train Tracks." In Self-Published Psychogeographies, 81–118. Cham: Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-65831-0_4.

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Fisher-Høyrem, Stefan. "Railways: Tracks, Trains, and Travellers." In Rethinking Secular Time in Victorian England, 69–112. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09285-5_3.

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AbstractThe Victorian railway network of technologies and associated practices was a prime site of secularization. A secular time independent of motion was the condition of possibility underpinning railway travellers’ ability to negotiate timetables formally locating all spaces within the same temporal grid, or to engage in conducts allowing their bodies to be relatively at rest while in transit. The electric telegraph helped towards expanding this temporal grid on a national scale, enveloping the entire national (eventually imperial) territory as an increasingly temporally synchronized whole. In this way, and to the degree that it succeeded in moving human bodies without deterioration, the Victorian railway network mediated secular time.
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Roth, Lawrence O., and Harry L. Field. "Power Trains." In An Introduction to Agricultural Engineering: A Problem-Solving Approach, 48–62. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-1425-7_6.

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Roth, Lawrence O., and Harry L. Field. "Power Trains." In Introduction to Agricultural Engineering, 48–62. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3594-2_6.

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Rao, J. S. "Gear Trains." In Kinematics of Machinery Through HyperWorks, 249–77. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1156-3_8.

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Fujiwara, Shunsuke. "Maglev Trains." In Advances in Superconductivity II, 41–46. Tokyo: Springer Japan, 1990. http://dx.doi.org/10.1007/978-4-431-68117-5_7.

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Duguid, Andrew. "Hidden Trains." In On the Brink, 31–66. London: Palgrave Macmillan UK, 2014. http://dx.doi.org/10.1057/9781137299307_2.

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Conference papers on the topic "Trains"

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Liang, Jialei, Ming Chai, Qi Wang, Dong Xie, Haoyuan Liu, Hongjie Liu, and Yong Zhang. "A Reachable Set-Based Train Safety Protection Method for Virtually Coupled Trains." In 2024 IEEE 27th International Conference on Intelligent Transportation Systems (ITSC), 4102–7. IEEE, 2024. https://doi.org/10.1109/itsc58415.2024.10920059.

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Susu, Huang. "An Innovative Combined Train Speed Measurement Method for Medium-Low Speed Maglev Trains." In 2024 International Conference on Electromagnetics in Advanced Applications (ICEAA), 211–15. IEEE, 2024. http://dx.doi.org/10.1109/iceaa61917.2024.10701617.

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Abbas-Turki, A., O. Grunder, A. El Moudni, and E. Zaremba. "Sequence Optimization for Timetabling High Frequency Passenger Trains." In 2012 Joint Rail Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/jrc2012-74137.

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Recently, Harrod has revealed that the occupancy constraints are not sufficient to timetable rail traffic. This insufficiency occurs when opposite movements of trains share the same route. In this paper, we propose a quick algorithm that considers overtaking and opposite train’s movements. This algorithm builds a train timetable from a proposed sequence of trains. It is based on an elementary model of an invariant resource sharing system. The algorithm is proposed in order to extend the genetic algorithm that calculates the sequence of trains for maximizing the frequency of passenger’s train.
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Jaumard, Brigitte, Thai Hoa Le, Huaining Tian, Ali Akgunduz, and Peter Finnie. "An Enhanced Optimization Model for Scheduling Freight Trains." In 2013 Joint Rail Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/jrc2013-2465.

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We propose a new dynamic row/column management algorithm for the schedule of freight trains in a single/double track railway system. While many works have already been devoted to train scheduling, previously published optimization models all suffer from scalability issues. Moreover, very few of them consider the number of alternate tracks in the sidings for train meets, as well as the delay incurred by trains that take sidings. We propose a non time-indexed model, which takes into account such constraints, and we design a solution scheme with iterative additions/removals of constraints/variables in order to remain with a manageable sized mathematical program, while still ensuring convergence to an optimal solution. Numerical results are presented on data instances of Canada Pacific Railway. We evaluate the performance of the optimization model, and the sensitivity of the train schedules to the length of the operation hours, the length of the trains, and the departure times.
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Wang, Yeteng, and Zhenxu Sun. "Influence of the Topological Structures of the Nose of High-Speed Maglev Train on Aerodynamic Performances." In ASME 2021 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/fedsm2021-65711.

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Abstract In the past few years, considerable attention has been paid to high-speed maglev train in the field of rail transit. The design speed of the high-speed maglev train is 600km/h, which is significantly higher than that of the high-speed train. With the increase in operating speed, high-speed maglev trains have higher requirements for aerodynamic shape. Superior performance, the beautiful aerodynamic shape is an important direction for the development of high-speed maglev trains. Based on the Vehicle Modeling Function (VMF) method, the current research has developed a parametric shape design method suitable for the aerodynamic shape of the maglev train’s nose. This method can obtain different topological structures of the high-speed maglev train’s nose. The current research uses this method to generate four maglev train noses with large appearance differences and uses these train noses to construct four simplified high-speed maglev models. Then this study numerically analyzes the flow fields of different train models and compares the differences in aerodynamic performance including aerodynamic drag, aerodynamic lift and wake characteristics. The Q-criterion is used to study the vortex structure and mechanism of different train wake regions, and the vortex propagation process is studied by turbulence kinetic energy (TKE). Studying the difference in the aerodynamic force of different topological shapes will help to improve the aerodynamic performance of high-speed maglev trains.
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Fang, Changzheng, Jing Yang, Quan Liu, Furen Feng, and Jianyong Zuo. "Research on an Intelligent Diagnostic Equipment Suitable for Rail Traffic Braking System." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97600.

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Abstract In order to meet the increasing requirements of train safety in the rail transit industry, it is important for the operators to monitor the running status and health status of the train in real time. Based on train on-broad data, using big data analysis method for data mining to study the health status of trains and change rules, it will be helpful to realize the informationization and intelligence of train operation. This paper designs and introduces a smart device for the brake system of rail transit trains. It reads the required data through the train CAN Bus network, and uses the wireless transmission device DTU to remotely send the analysis result to the cloud server. The user can easily browse the train’s device status and system health analyzed by the server through the webpage anytime and anywhere, which is helpful for the health operations and management of trains. The equipment passed the relevant tests of the Changsha subway train in China, which can meet the needs of functional design.
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Thomet, Michel A. "Powering the Trains." In ASME 2012 Rail Transportation Division Fall Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/rtdf2012-9414.

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Electric trains exhibit some of the highest performance among all surface modes of transportation in terms of speed, acceleration, control precision and reliability. This is so because of the very large amount of power that can be delivered to each train by means of a third rail or an overhead wire. Also, like all rail vehicles, trains have a very small friction/drag to overcome, even at high speed. To make this high performance possible, the train power distribution system has to be designed so that it can be highly reliable and deliver the power to the trains even when some of the systems components are out or are degraded. Because of the complexity of the power distribution system, a simulation approach is generally followed to model the trains operating in different modes and headways under different component failure scenarios. This process is illustrated using a real life project, namely the Dulles Corridor Metrorail project. A Bechtel proprietary simulation program is used to model the new rail line. A series of failure scenarios is investigated and the impact on train operations is evaluated. The purpose of this exercise was to verify that the systems components have been properly sized and specified.
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Cantone, Luciano. "Application of UIC 421 procedure to Freight Trains fitted with a Distribute Power System." In EuroBrake 2021. FISITA, 2021. http://dx.doi.org/10.46720/1225127eb2021-ibc-011.

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Within the Innovative Programme 5 (IP5) of Shift 2 Rail (S2R) initiative (“Moving European Railway Forward”), The Open Call Project, Marathon2Operation (M2O), has cooperated with the FR8RAIL II Project to demonstrate the feasibility of freight trains equipped with Distributed Power System (DPS), using wireless communication to control the Traction Units (TUs). At this aim, the TrainDy software has been used as computational tool for Longitudinal Train Dynamics (LTD) and the Leaflet UIC 421 was applied as methodology in order to compare simulation results. The TrainDy software is considered the state-of-the-art tool for LTD computation by major European Railway Undertakings and the Leaflet UIC 421 provides a statistical methodology to accept new or modified operational scenarios for freight trains, which are beyond current regulations in terms of hauled mass and/or train length. The basic idea of UIC 421 is the “relative approach”, even if it does not discard the “absolute approach”. In short, the “relative approach” considers a train acceptable for regular operation if the risk level of the train is lower than the risk level of trains already in service; “the absolute approach” considers a train acceptable for regular operation if in-train forces are lower than (reliably) computed or measured admissible in-train forces. Since the cooperation among M2O and FR8RAIL II was based on the “relative approach”, only this approach will be discussed in this paper. The computation of in-train forces is crucial for new train consists to avoid derailment or disruption.</p><p>The paper shows the application of the relative approach in a particular way: the same trains (randomly generated) are simulated with and without the DPS system, considering different train operations and assuming communication among the TUs successful or not. In this way, the effects on in-train forces of DPS and wireless communication are immediately emphasized.</p><p>This paper reports the comparison between experimental measurements and TrainDy simulations and a series of analyses performed to compare the LTD of reference train against DPS train on level track, but also on up/down hill. The interesting conclusion that comes from this study is that the comparison among the reference and DPS trains does not depend on the track gradient, but rather on the train operations. Of course, the track gradient, especially when it is as steep as the one considered in this analysis, has a considerable effect on in-train forces as well as the exact train configuration (i.e., the wagon order within the train). </p><p>This paper could be used as guideline for similar analyses about in-train forces of new types of trainsets, e.g., implementing a new technology as radio DPS.
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Scales, Brian T. "The Hi-Lo Bi-Track System." In ASME/IEEE 2004 Joint Rail Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/rtd2004-66008.

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The Hi-Lo Bi-Track System is an innovative technology that provides appropriate superelevations on curves to suit both high-speed passenger trains and low-speed freight trains. Adoption of the Hi-Lo Bi-Track System would provide the following benefits: • Permit creation of high-speed lines for passenger trains over existing freight train rights-of-way without compromising performance of either train technology. • Provide improvement in typical train trip times due to reduced need for speed reduction at curves. • Provide savings in energy consumption due to less braking for curves and subsequent acceleration back to line speed. • Provide better performance then “tilting trains” in reducing typical train trip times. • Avoid high vertical and lateral track forces resulting from operation of “tilting trains.” • Applicable to high-speed mail and express freight trains in addition to high-speed passenger trains.
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Shrestha, Pradhumna Lal, Michael Hempel, Jose Santos, and Hamid Sharif. "A Multi-Sensor Approach for Early Detection and Notification of Approaching Trains." In 2014 Joint Rail Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/jrc2014-3729.

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Personnel safety is a cornerstone of railroad operations. However, various activities such as track maintenance and repair require workers to be physically present on or near railroad tracks that are potentially active. This creates a significant risk to the workers, especially at very high train speeds and in places where the geographical topography reduces direct line of sight. In fact, fatalities and injuries continue to be reported. A common approach to lessen this problem is to employ workers specifically to act as lookouts — to observe approaching trains and report them back to the work site. However, maintenance operations are often lengthy and it is common for the lookouts to lose concentration and thus the possibility arises that they fail to report incoming trains. Another possibility is the failure of the communication link between the observer and the workers. In an attempt to remove the human element and the associated risks, commercial vendors have developed automated systems to detect approaching trains and trigger alarms. However, the current commercial solutions available have several drawbacks. Firstly, deploying the available solutions requires procedures that are invasive and possibly destructive for the railroad tracks. They often involve digging underneath the tracks to install devices. This also requires significant installation effort and makes the solution often nonportable. This has serious operating concerns for the railroads since maintenance operations are temporary and installing permanent devices becomes inefficient. Also, since the solutions are not portable, deploying them on a large scale is not cost effective. Secondly, the solutions have limited sensing capabilities, employing only a single detection approach such as mechanical treadles, and do not provide comprehensive information about the trains being detected. For example, if the maintenance is occurring on parallel tracks, the sensors may fail to detect which of the tracks the train is currently operating on. Also, they cannot accurately capture all the characteristics of the approaching train, such as length, velocity, identifying signature, etc. And thirdly, they often have high false detection rates as they lack methods to differentiate the signature of a train from other events, such as drilling and heavy machinery operation. With the objective of addressing all these issues, we have proposed a multi-sensor based system that can integrate the abilities of the different sensors so as to reliably predict all the essential characteristics of a train. In this paper we present the architecture of our multi-sensory system. We also report our findings and analysis of evaluating our sensor systems on tracks at the Transportation Technology Center, Inc. (TTCI) in Pueblo, CO.
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Reports on the topic "Trains"

1

Allen, J. F., and L. K. Schubert. The TRAINS Project. Fort Belvoir, VA: Defense Technical Information Center, May 1991. http://dx.doi.org/10.21236/ada247447.

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Stent, Amanda J., and James F. Allen. TRAINS-96 System Evaluation. Fort Belvoir, VA: Defense Technical Information Center, March 1997. http://dx.doi.org/10.21236/ada329865.

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Heeman, Peter A., and James F. Allen. The TRAINS 93 Dialogues. Fort Belvoir, VA: Defense Technical Information Center, March 1995. http://dx.doi.org/10.21236/ada301012.

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Talley, John. Management of Secondary Treatment Trains. Fort Belvoir, VA: Defense Technical Information Center, December 2001. http://dx.doi.org/10.21236/ada406592.

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Peacock, Richard D. Fire safety of passenger trains :. Gaithersburg, MD: National Bureau of Standards, 1994. http://dx.doi.org/10.6028/nist.tn.1406.

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Kaertner, F. X., and D. Kielpinski. Laser Cooling With Ultrafast Pulse Trains. Fort Belvoir, VA: Defense Technical Information Center, September 2005. http://dx.doi.org/10.21236/ada442315.

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Kielpinski, David. Laser Cooling with Ultrafast Pulse Trains. Fort Belvoir, VA: Defense Technical Information Center, July 2010. http://dx.doi.org/10.21236/ada524694.

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Kielpinski, David. Laser Cooling with Ultrafast Pulse Trains. Fort Belvoir, VA: Defense Technical Information Center, August 2011. http://dx.doi.org/10.21236/ada547504.

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9

Cummings, D. I., A. L. Bergen, M. D. Pyne, and H. A. J. Russell. Glacial dispersal trains in Arctic Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/311186.

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Marzen, Sarah, Michael R. DeWeese, and Jim Crutchfield. Statistical Complexity of Neural Spike Trains. Fort Belvoir, VA: Defense Technical Information Center, August 2014. http://dx.doi.org/10.21236/ada618984.

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