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Dissertations / Theses on the topic 'HIGH SPEED TRACK'

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Published: 11 September 2023

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1

Michas, Georgios. "Slab track systems for high-speed railways." Thesis, KTH, Väg- och banteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96507.

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In the last 40 years an increase in train speed and axle load around the world and other challenges in the conventional ballasted track system gave birth to ballastless railway track system. This study examines in depth the various slab track systems that are being used today. Their design characteristics as well as the various requirements for efficient use are thoroughly explained. At least 34 different ballastless systems have been recorded in many railway networks throughout the world. The most significant slab track systems are analysed in detail and compared. Slab track designs have sign
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2

Fesharaki, Mohammad. "3-D Dynamic Analysis of High-Speed Railroad Track." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3366.

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High-Speed Rail (HSR) as a fast, reliable and environmentally friendly mode of transportation has received a lot of attention in recent decades. The International Union of Railways reported that there are more than 18600 miles of HSR in operation and about 1.6 billion passengers per year are carried by them. Although there are plans for HSR in many states including Florida, the United States, however, is still hesitant to develop its own HSR network. One of the main barriers to developing high-speed rail is excessive vibration propagation to the media which may cause annoyance to people who li
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3

Sárik, Veronika. "Decision-making model for track system of high-speed rail lines : Ballasted track, ballastless track or both?" Thesis, KTH, Byggvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226308.

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During the 50 years of existence of high speed railways, the track structure solutions have developed both in number and in type. As of today, in case of conventional railway, there are 2 main types one could mention: ballasted and ballastless track solutions. However, there is no standardized procedure for choosing between these systems and between their respective variants, the decision is made on a case-by-case basis. This thesis aims to create a generic framework for decision making, primarily taking into account technical details. The model, the input parameters and variables can be easil
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Karis, Tomas. "Track Irregularities for High-Speed Trains : Evaluation of their correlation with vehicle response." Thesis, KTH, Järnvägsteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156640.

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5

Shimatake, Masao. "A track maintenance model for high-speed rail : a systems dynamics approach." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43385.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.<br>Vita.<br>Includes bibliographical references (leaves 174-175).<br>by Masao Shimatake.<br>M.S.
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6

Mohlén, Marcus, Jesper Malmberg, and Filip Hahrs. "Dimensioning of slabs for high-speed railway lines." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-54091.

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The Swedish Transport Administration has been giving the task to set up a new standard for concrete slabs for the new high-speed railway in Sweden. They are demanding that the concrete slabs must be dimensioned according to the German Beton Kalender 2000. This report will explore the results when dimensioning a slab track, according to the German Beton Kalender 2000. Moment capacity, deformation, and crack width are calculated according to two structural theories, namely slab and beam theory, and a comparison between the two methods is presented.
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Leung, Joseph, Michio Aoyagi, Donald Billings, Herbert Hoy, Mei Lin, and Fred Shigemoto. "A MOBILE RANGE SYSTEM TO TRACK TELEMETRY FROM A HIGH-SPEED INSTRUMENTATION PACKAGE." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607380.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>As renewal interest in building vehicles based on hypersonic technologies begin to emerge again, test ranges anticipating in supporting flight research of these vehicles will face a set of engineering problems. Most fundamentals of these will be to track and gather error free telemetry from the vehicles in flight. The first series of vehicles will likely be reduced-scale models that restrict the locations and geometric shapes of the telemetr
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8

Scoughton, Troy E., and Robert Danford. "A HIGH DATA RATE TELEMETRY PROCESSING SYSTEM FOR THE HIGH SPEED TEST TRACK AT HOLLOMAN AFB." International Foundation for Telemetering, 1990. http://hdl.handle.net/10150/613480.

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International Telemetering Conference Proceedings / October 29-November 02, 1990 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>The system covered in this paper is the Telemetry Processing System (TPS) designed and installed for processing data acquired from high speed test sleds at Holloman AFB, NM. Because this facility operates as a test range, testing sleds from many different agencies for a variety of different purposes, prior knowledge is not always available concerning the instrumentation on the test sled to be used and therefore the type of data retrieval and processing re
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9

Lia, Anne Margrethe. "Life Cycle Assessment of Technical Solutions for High-Speed Rail: Tunnel and Track designs." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18706.

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On the 19th of February 2010, the Ministry of Transport and Communication presented the Norwegian National Rail Administration with the task of assessing different aspects of the future of high-speed rail in Norway. The report, the Norwegian High-Speed Rail Assessment (NHSRA), consist three separate evaluations where the climate assessment by Bergsdal et al. (2012), motivated this thesis. Results from the report identify the railway infrastructure as the dominant emission source for the corridor, with the length of tunnels representing the determining factor. Simultaneously, an ongoing debate
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10

Rashid, Shahbaz. "Parametric study of bridge response to high speed trains, ballasted track on concrete bridges." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99385.

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When a train enters a bridge, passenger sitting inside will feel a sudden bump in the track, which not only affect the riding comfort of the passengers but also put a dynamic impact on the bridge structure. Due to this impact force, we have very serious maintenance problems in the track close to the bridge structure. This sudden bump is produced when train travelling on the track suddenly hit by a very stiff medium like bridge structure. In order to reduce this effect, transition zones are introduced before the bridge so that the change in stiffness will occur gradually without producing any b
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11

Stridfelt, Arvid. "High Speed On-Chip Measurment Circuit." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2764.

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<p>This master thesis describes a design exploration of a circuit capable of measuring high speed signals without adding significant capacitive load to the measuring node. </p><p>It is designed in a 0.13 CMOS process with a supply voltage of 1.2 Volt. The circuit is a master and slave, track-and-hold architecture incorporated with a capacitive voltage divider and a NMOS source follower as input buffer to protect the measuring node and increase the input voltage range. </p><p>This thesis presents the implementation process and the theory needed to understand the design decisions and considerati
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12

Thomas, Jossian, and Barenys Assís Arañó. "Evaluation of 3D dynamic effects induced by high-speed trains on double-track slab bridges." Thesis, KTH, Bro- och stålbyggnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188850.

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In addition to a static design, a dynamic analysis has to be performed for bridges for which the maximum permissible train speed exceeds 200 km/h. This analysis requires a lot of computing time, for this reason Svedholm and Andersson (2016) have developed a simple tool describing the relationship between the first eigenfrequency of the bridge, the span length and the minimum mass to fulfill the regulation specified in EN-1990. However, these diagrams are based on 2D beam models in which the 3D dynamic effects are not considered. An evaluation of the torsional modes has been performed by analyz
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13

Sayeed, Md Abu. "Design of ballasted railway track foundations using numerical modelling with special reference to high speed trains." Thesis, Curtin University, 2016. http://hdl.handle.net/20.500.11937/796.

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A new design method for ballasted railway track foundations was developed based on improved empirical models and sophisticated three-dimensional finite element numerical analyses. The method was developed in the form of simple design charts for use by practitioners. The results obtained from the method were found to be in an excellent agreement with the field observations, and the method is expected to provide a significant contribution to the current railway tack design code of practice.
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Younis, Choudhry Jabbar. "Design and Implementation of a high-efficiency low-power analog-to-digital converter for high-speed transceivers." Thesis, Linköpings universitet, Elektroniksystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-77178.

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Modern communication systems require higher data rates which have increased thedemand for high speed transceivers. For a system to work efficiently, all blocks ofthat system should be fast. It can be seen that analog interfaces are the main bottleneckin whole system in terms of speed and power. This fact has led researchersto develop high speed analog to digital converters (ADCs) with low power consumption.Among all the ADCs, flash ADC is the best choice for faster data conversion becauseof its parallel structure. This thesis work describes the design of such a highspeed and low power flash AD
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15

Orvnäs, Anneli. "Active Lateral Secondary Suspension in a High-Speed Train to Improve Ride Comfort." Licentiate thesis, KTH, Aeronautical and Vehicle Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10432.

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<p>Active secondary suspension in trains has been studied for a number of years, showing promising improvements in ride comfort. However, due to relatively high implementation and maintenance costs, active technology is not being used in service operation to a large extent. The objective of this study is to develop an active lateral secondary suspension concept that offers good ride comfort improvements and enables centring of the carbody above the bogies when negotiating curves at unbalanced speed. Simultaneously, the active suspension concept should be a cost-effective solution for future se
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16

Gillet, Guillaume. "Simply supported composite railway bridge: a comparison of ballasted and ballastless track alternatives : Case of the Banafjäl Bridge." Thesis, KTH, Bro- och stålbyggnad, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36359.

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17

Lestoille, Nicolas. "Stochastic model of high-speed train dynamics for the prediction of long-time evolution of the track irregularities." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1094/document.

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Les voies ferrées sont de plus en plus sollicitées: le nombre de trains à grande vitesse, leur vitesse et leur charge ne cessent d'augmenter, ce qui contribue à la formation de défauts de géométrie sur la voie. En retour, ces défauts de géométrie influencent la réponse dynamique du train et dégradent les conditions de confort. Pour garantir de bonnes conditions de confort, les entreprises ferroviaires réalisent des opérations de maintenance de la voie, qui sont très coûteuses. Ces entreprises ont donc intérêt à prévoir l'évolution temporelle des défauts de géométrie de la voie pour anticiper l
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18

Li, Xiangtao. "High-speed analog-to-digital conversion in SiGe HBT technology." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24652.

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Thesis (Ph.D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Cressler, John D.; Committee Member: Laskar, Joy; Committee Member: Lee, Chin-Hui; Committee Member: Morley, Thomas; Committee Member: Papapolymerou, John
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19

Black, Brian C., Laura H. Bollock, Sinene Bouabid, et al. "Sea TENTACLE: Track, Engage, & Neutralize Threats - Asymmetric & Conventional - in the Littoral Environment." Thesis, Monterey, California : U.S. Naval Postgraduate School, 2006. http://hdl.handle.net/10945/7275.

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Includes supplementary material.<br>Sea TENTACLE is a proposed afloat platform whose primary mission is to utilize the state-of-the-art technology of unmanned vehicles to monitor and neutralize all subsurface enemy threats in the littorals. This mission can be specified further as anti-submarine warfare, mine warfare and maritime surveillance. The design philosophy of Sea TENTACLE embodies the ideal of providing a multi-mission capable sea frame extending network-centric warfare into the littorals. The design goals of the TSSE team were first to develop a platform to deploy, recover, and mai
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20

Pasciak, Alexander Samuel. "The development of a high speed solution for the evaluation of track structure Monte Carlo electron transport problems using field programmable gate arrays." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2558.

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21

Perrin, Guillaume. "Random fields and associated statistical inverse problems for uncertainty quantification : application to railway track geometries for high-speed trains dynamical responses and risk assessment." Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-01001045.

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Les nouvelles attentes vis-à-vis des nouveaux trains à grande vitesse sont nombreuses: on les voudrait plus rapides, plus confortables, plus stables, tout en étant moins consommateur d'énergie, moins agressif vis-à-vis des voies, moins bruyants... Afin d'optimiser la conception de ces trains du futur, il est alors nécessaire de pouvoir se baser sur une connaissance précise de l'ensemble des conditions de circulations qu'ils sont susceptibles de rencontrer au cours de leur cycle de vie. Afin de relever ces défis, la simulation a un très grand rôle à jouer. Pour que la simulation puisse être uti
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22

Serrano, González Irene. "LCC approach for High-speed ballastless tracks." Thesis, KTH, Transportplanering, ekonomi och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191159.

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An approach of life cycle cost analysis (LCCA) for high-speed ballastless tracks in Spain is carried out in this document based on an approximation of the present value behaviour through the Electre II Multi criteria method. A review of other LCC researches has been done analysing their results in order to adapt previous experimental tracks costs to the present study which is focused on construction and maintenance costs in Spain. Even though several ballastless systems are introduced and analysed in terms of costs, and environmental impacts; only four of them are deeply compared with ballaste
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23

Forsgren, Niklas. "Sampling Ocsilloscope On-Chip." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1563.

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<p>Signal-integrity degradation from such factors as supply and substrate noise and cross talk between interconnects restricts the performance advances in Very Large Scale Integration (VLSI). To avoid this and to keep the signal-integrity, accurate measurements of the on-chip signal must be performed to get an insight in how the physical phenomenon affects the signals. </p><p>High-speed digital signals can be taken off chip, through buffers that add delay. Propagating a signal through buffers restores the signal, which can be good if only information is wanted. But if the waveform is of import
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Merelle, Vincent. "Concept de radars novateurs pour la vision à travers les milieux opaques." Thesis, La Rochelle, 2018. http://www.theses.fr/2018LAROS017/document.

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La « vision » à travers les milieux opaques (murs, cloisons, décombres, ou plus généralement tout milieu qui occulte la vision humaine) est l’un des problèmes clefs du contrôle et de la sécurité. Il apparaît à l’heure actuelle un réel besoin de disposer de dispositifs d’observation à travers ces milieux pour des applications tant militaires (lors des assauts, des prises d’otages, etc.) que civiles (recherche de personnes enfouies dans des décombres, dans un incendie, etc). Les avancées sur cette problématique ont conduit à mettre en place des systèmes radars à très courte portée, opérationnels
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Gry, Laurent. "Modélisation du comportement dynamique d'une voie TGV pour la réduction du bruit de roulement." Châtenay-Malabry, Ecole centrale de Paris, 1995. http://www.theses.fr/1995ECAP0419.

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Un modèle de voie périodique a été développé afin de réduire le bruit émis dans l'environnement durant le passage d'un train. Ce modèle, prenant en compte les déformations de la section du rail, couvre une large gamme de fréquences, 0 - 5000 Hz. La considération d'un appui discret le rend cependant moins performant dans les hautes fréquences, pour lesquelles les ondes propagatives émises sur une travée ont une longueur d'onde proche de la longueur d'appui. Une méthode générale d'analyse des milieux périodiques unidimensionnels est alors proposée afin de prendre en compte l'effet de la longueur
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Буряковський, Сергій Геннадійович. "Наукові основи вибору електроприводів стрілочних переводів для швидкісних та високошвидкісних залізниць". Thesis, Український державний университет залізничного транспорту, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29744.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.22.09 – "Електротранспорт". Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена створенню теоретичних основ вибору та оцінки типу електроприводів стрілочних переводів, що працюють в оптимальних режимах з урахуванням нелінійностей навантаження та електрофізичних властивостей двигунів, на основі рішення задачі мінімізації основних показників якості як: час переводу, величина імпульсу удару гостряка об рамну рейку, величина пружної сили в робочій тязі, а т
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Буряковський, Сергій Геннадійович. "Наукові основи вибору електроприводів стрілочних переводів для швидкісних та високошвидкісних залізниць". Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29739.

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Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.22.09 – "Електротранспорт". Національний технічний університет "Харківський політехнічний інститут", Харків, 2017. Дисертація присвячена створенню теоретичних основ вибору та оцінки типу електроприводів стрілочних переводів, що працюють в оптимальних режимах з урахуванням нелінійностей навантаження та електрофізичних властивостей двигунів, на основі рішення задачі мінімізації основних показників якості як: час переводу, величина імпульсу удару гостряка об рамну рейку, величина пружної сили в робочій тязі, а та
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CARRERA, DANNY HERNAN ZAMBRANO. "DETERMINATION OF THE TRAJECTORY OF HIGH SPEED GROUND VEHICLES IN PREDEFINED TRACKS THROUGH OPTIMIZATION TECHNIQUES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9352@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Em veículos de competição com velocidades elevadas, o principal objetivo é chegar em primeiro lugar, o que significa percorrer um determinado número de voltas em uma trajetória fechada fazendo algumas manobras para cumprir o circuito no menor tempo possível, dentro das limitações impostas pelas caracteristicas dinâmicas e de condução destes veículos. A otimização é uma metodologia que pode ser usada para reproduzir trajetórias e técnicas de condução usadas pelos pilotos de corrida, e também para investigar os efeitos de vár
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Liu, Kaiyi. "Characterization and Control of an Electrospinning Process." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1355239985.

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Гусак, Марина Анатоліївна, Марина Анатолиевна Гусак та Marina A. Gusak. "Підвищення ефективності роботи залізничної колії РїСЂРё спеціалізації напрямків для вантажних С– пасажирських перевезень". Thesis, Видавництво Дніпропетровського національного університету залізничного транспорту імені академіка Р’. Лазаряна, 2012. http://eadnurt.diit.edu.ua:82/jspui/handle/123456789/1349.

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Гусак, Рњ. Рђ. Підвищення ефективності роботи залізничної колії РїСЂРё спеціалізації напрямків для вантажних С– пасажирських перевезень : авт. РґРёСЃ. Рє. С‚. РЅ.: 05.22.06 / Рњ. Рђ. Гусак ; Дніпропетр. нац. СѓРЅ-С‚ залізн. трансп. С–Рј. акад. Р’. Лазаряна. - Р”. : Р’РёРґ-РІРѕ Днiпропетр. нац. СѓРЅ-ту залізн. трансп. iРј. акад. Р’. Лазаряна, 2012. УДК 625.1:656.222.1 ГРНТР? 73.29.11 Захи
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SHIH, CHENG-HUA, and 施承華. "The Research on High-speed Rail Track Deformation Survey." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2645bj.

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碩士<br>建國科技大學<br>土木與防災研究所<br>107<br>This research is primarily dealing with the influence on the high-speed rails from the increasing service time, artificial activities, and other environmental elements. Also, it will deal with the influence on its running safety and riding comfort from the problems of deterioration and distortion of the rails. All the data obtained in this research came from the collection made by the orbital examination vehicle, and the sections which need adjusting are determined by the High-speed Railroad Company. With the help of the high-precision electronic level and th
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Chia-Hsien-Ho and 何家賢. "Optimization Model for Track Alignment in High-speed Railway System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/17965729966697647802.

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碩士<br>國立中興大學<br>土木工程學系所<br>103<br>The alignment of high-speed rail tracks change as the time passes. The tracks continuously face with detrimental conditions and cause irregularity, such as earthquake, degrade of pre-stressed concrete bridges, soil subsidence and so on. Track alignment deterioration will affect not only the comfort of passengers but also the safety of train operations. On the other hand, irregularity of tracks cause vibration and impact between tracks and wheels which seriously reduces the life of train system and track components as well as increase the consumption of energy.
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Huang, Ren-Jeng, and 黃仁政. "Dynamic Response of Track System under High-Speed Moving Loads." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/39448068420857608614.

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碩士<br>國立成功大學<br>土木工程學系碩博士班<br>95<br>With the trend of increasing speed and capacity, the railway structures are facing more and more challenges. When the train speed approach the critical wave velocities of the track structure, the deformations of track systems may increase dramatically due to resonance and result in track failure and even derailments. This study applied the finite element analysis package, ABAQUS, to model track structures loaded by high speed moving suspended mass to investigate the interactions among track structure parts and track responses. 　　The results of this study sho
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Chi-FongHuang and 黃啟峰. "Research of Track Alignment Managnment Technology in High Speed Railway." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40478675055875543161.

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碩士<br>國立成功大學<br>工學院工程管理專班<br>98<br>High speed railway requirement is growing up around the world in recent year. Following the tendency towards of high speed railway technology, it is necessary to upgrade the requirement of safety and riding quality in the view of track. Track alignment deterioration will be influenced by revenue operation time, environment or 3rd party construction…The deterioration will become track alignment irregularity and operation safety and riding quality concern caused. How to keep riding quality in good condition? It is necessary to create good track alignment manage
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Liu, Yu-Wei, and 劉鈺韋. "High Speed Frame Grabber and Sleepers Positioning for Track Monitoring System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/45344297730003781871.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>98<br>In recent years, along with the improvement of the image processing technology, image recognition has already become the mainstream method of object inspection. The quality of images will directly affect the image-recognition rate. In track monitoring systems, track conditions will affect driving security of trains. Therefore, the conditions of track systems are very important. In this research, a high speed frame grabber system and the triggering rate of its line scan camera can be adjusted to match the vehicle speed so that the pixels per inch of an image are
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Araújo, Nuno Miguel Faria. "High-speed trains on ballasted railway track : dynamic stress field analysis." Doctoral thesis, 2011. http://hdl.handle.net/1822/12388.

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Tese de doutoramento em Engenharia Civil (área do conhecimento em Geotecnia)<br>The analysis of ballasted railway structures still demands many improvements towards preceding an accurate estimate of its global behavior, i.e, towards reproducing the real performance of the materials and the structure. Furthermore, in the design process, ultimate/serviceability limit states and life cycle costs should be attended. As a result, a wide range of research works are being introduced. This work contributes to the improvement of these processes throughout laboratory and numerical experiments aimi
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Chen, Wen-liang, and 陳文亮. "A Study of Rail Irregularity Measurement of High Speed Rail Slab Track－A case Study of Taiwan High Speed Rail Project." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/44379771190148646236.

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碩士<br>逢甲大學<br>交通工程與管理所<br>95<br>Taiwan High Speed Rail started its operation on March 2, 2007. To ensure the safe operation and comfortable rides, the inspection of rail irregularity is crucially important. The Japanese AF-55 slab track and the German Rheda 2000 slab track are both used in Taiwan High Speed Rail. These two kinds of slabs are very different from each other in their construction methods, rehabilitation, and maintenance.Due to the repeated high speed heavy load, the irregular deformation of the rail geometry, such as irregularity in gauge, alignment, superelevation, surface and t
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RANI, PRITI. "STATIC ANALYSIS AND PARAMETRIC INVESTIGATION OF BALLASTLESS RAILWAY TRACK FOR HIGH SPEED RAIL." Thesis, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16767.

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Increasing population and high population density of India has put intense pressure on existing railway track. The are operating at a way more than their capacity and this has strained many rail lines which leads to derailment and other mishaps. This high population density suits High speed railway. To fight with increased traffic with regard to speed and loading, the stresses variation in various components must be known accurately to evaluate useful life of each component for its life assessment. To asses this detailed analysis is necessary to develop methodology for every track component un
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CHIEH, CHEN SHENG, and 陳聖杰. "The Analysis of Vibration Caused by High-speed Train Passing the Slab Track." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/75016938871689803845.

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CHIN-CHANG, CHIU, and 邱欽璋. "A Study of the " Slab Track Rail " in Taiwan High Speed Rail construction." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/05481644486400482780.

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碩士<br>中華大學<br>土木工程學系碩士班<br>92<br>Taiwan High Speed Rail (THSR) has proposed NT$500 Billion on BOT Rail Transportation System which makes it the first and ever highest budget in the world of its kind. Furthermore, THSR adopt the Slab Track Rail Transportation System with speed over 300 km per hour (Km/Hr) which will only take 90 minutes from Taipei to Kao-hsiung with the total distance of 345 km; this makes Taiwan a metropolis throughout entire island. The major structures of the Slab Track System include roadbed, stopper, cement asphalt, tract slab,rail,railslab and faste
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Hsu, Jia-Lun, and 許家綸. "Analysis of Signal Leakage of Audio Frequency Track Circuit for High-Speed Rail." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/52206397064649999142.

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碩士<br>中原大學<br>電機工程研究所<br>100<br>The audio frequency(600Hz) signal is transmitted by the signalling system on the high speed track circuit, which can specify whether the track circuit being occupied. If any, the next train can not enter the occupied track circuit(about one kilometer) to prevent from the head-on collision. When the rail fastening assembly(RFA) is polluted badly or is covered with heavy rain, the audio frequency signal may leak out of the RFA as to the signalling system making the incorrect judgement that the track circuit were occupied. This thesis intends to simulate the leakag
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MING, SHIU TZ, and 徐子明. "Dynamics Characteristics Of Slab Track And It''s Dynamics Responses Under High -Speed Railway." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/70420480212181298242.

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碩士<br>國立臺灣大學<br>造船及海洋工程學研究所<br>89<br>The study of modeling and structural analysis of the dynamic characteristics of the slab track and its dynamics responses under high-speed railway is presented. The slab track is modeled by layered beam with viscoelastic foundation and the natural frequency; mode shape and resonance velocity can be solved with dynamic stiffness matrix of the layered beam structure. With the derivation of the dynamic response under single moving load it can be obtained by applying the same theory that a high-speed railway passed through. Furthermore, the Japanese A-51 slab t
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Wang, Yi-Cheng, and 王翊丞. "Dynamic response of track structures in transitional sections induced by high speed moving trains." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/91509268167166951951.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>99<br>Taiwan High Speed Rail passes through the west side of Taiwan. In other to match up varied elevation of landforms, most of the rail structure are layed on viaduct, some of them are layed on tunnel or on land. The track structure between two type sections is called a transitional section, e.g., tunnel and land, or land and bridge. This thesis focuses on the dynamic response of transitional section induce by high speed passing train. 　　In this thesis, the transient dynamic finite element method code – LS-DYNA was used to analyze the dynamic response of trac
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Huang, Guan-Lin, and 黃冠霖. "Low Droop Rate, High Speed Broadband Track-and-Hold Amplifiers Using Silicon Based Technique." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/jd5h2k.

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碩士<br>國立中央大學<br>電機工程學系<br>106<br>This thesis focus on the design and analysis of the low droop rate, high speed broadband track-and-hold amplifiers. The design goals of the proposed circuits are broadband, low droop rate and low dc power consumption. The circuit design, analysis, simulation, and measurement are completely presented in this thesis, and the discussion and conclusion are also addressed for the future works. The introduction and design principle of the THA will be presented in Chapter 2. A differential cancellation technique is proposed for the track-and-hold stage to reduce the f
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BHARDWAJ, SAURABH. "BONDGRAPH ANALYSIS OF DYNAMIC INTERACTION BETWEEN THE CONCRETE SLAB AND SUBGRADE FOR HIGH SPEED TRACK." Thesis, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16703.

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In the last few years there has been a major shift from petrol, diesel vehicles to electric vehicles and other alternate fuel vehicles, because of the limited availability of fossil fuels. High speed train is one such example of electric vehicles, that have witnessed an increasing demand in present times, specially in urban cities, due to its various advantages, namely, ease of use, economical, time saving, and comfortable. As a result of these factors, analysis and study of such systems, for their optimal performance and more economical operation, is of paramount concern. The present-day s
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Lin, Yu-An, and 林俞安. "Design and Analysis of High Speed High Linearity High Resolutoin Track-and-Hold Amplifier in III-V andSilicon-Based Processes." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/d7b9d4.

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碩士<br>國立中央大學<br>電機工程學系<br>106<br>Several microwave and millimeter wave (MMW) high linearity track-and-hold amplifiers (THAs) for high speed data conversion systems are presented in this dissertation. Design, investigation and analysis of THAs shown in this dissertation are verified by the experimental results. The introduction and design considerations of THA are demonstrated in Chapter 2 in details. A compact DC-to-82.4-GHz broadband amplifier using 0.15 μm　GaAs E-mode PHEMT process is demonstrated in Chapter 3. The amplifier is implemented in common-source (CS) configuration with bandwidth e
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Chung, Yu-Lun, and 鍾毓倫. "Design of High-Speed ADC with distributed Track-and-Hold Pre-comparator in CMOS 0.18µm." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/12828813510875106840.

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碩士<br>中原大學<br>電子工程研究所<br>97<br>This work presents a new flash analog-to-digital converter (ADC) with distributed track-and-hold pre-comparators (THPCs). Utilizing the proposed architecture, the loading capacitances of the ADC front-end sampling sub-circuits can be markedly reduced, thereby improving operation speed. In a standard 0.18µm CMOS process, a 1.6GS/s 6-bit flash ADC is implemented to demonstrate the feasibility of the proposed distributed THPC architecture. The equivalent input capacitance of each input port of the proposed flash ADC is only 400fF, which is an easily driven interface
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48

Cunha, J. P. "Modelling of ballasted railway tracks for high-speed trains." Doctoral thesis, 2013. http://hdl.handle.net/1822/24858.

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Tese de doutoramento em Engenharia Civil<br>Ballasted railway tracks are one of the most common structures travelled by high-speed trains. The high circulation speeds of these trains lead to increased vibrations in the tracks and nearby structures, which can affect the serviceability and maintenance costs of the tracks. There is a growing demand for a means of accurately predicting the performance of ballasted railway tracks in train circulation. Numerical simulations are a highly effective means of predicting track response and the propagation of vibrations to the free field. However,
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Li, Chang-Ray, and 李承叡. "Research on Linearity And Droop Rate for Silicon Based High Speed Broadband Track-and-Hold Amplifiers." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/th2xvx.

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碩士<br>國立中央大學<br>電機工程學系<br>107<br>This thesis mainly discusses the application of high-linearity track and hold amplifiers for high-speed data conversion systems in microwave and millimeter-wave bands, and focuses on the improvement of rate-of-change and linearity. The proposed design, research and theoretical calculations will be verified with on wafer measurement results. The introduction and design considerations of THA includes the operating principle, important parameter descriptions, design considerations, and frequency-down sampling applications will be presented in Chapter 2. The propos
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Liu, Yu-Cheng, and 劉育誠. "Research on high-speed broadband amplifiers for track-and-hold applications and millimeter-wave active integrated antennas." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/3kkxez.

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博士<br>國立中央大學<br>電機工程學系<br>104<br>Research on the broadband amplifiers, track-and-hold circuits, and active integrated antennas in microwave and millimeter-wave (MMW) are presented in this dissertation. Design and analysis of the broadband cascode distributed amplifiers (DAs) using GaAs heterojunction bipolar transistor (HBT) / high electron mobility transistor (HEMT) process are completely presented with experimented results in Chapter 2. The gain-bandwidth analysis of cascode gain cell is presented using HEMT-HEMT, HEMT-HBT, HBT-HEMT, and HBT-HBT configurations to improve circuit performance.
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