Relevant bibliographies by topics / Tunnel problem

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

Academic literature on the topic 'Tunnel problem'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Tunnel problem"

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Sui, Chuan Yi, Xu Dong Zhou, and Lin Hui Wang. "The Comparison of Tunnel Engineering Construction Methods for Renhechang Tunnel Crossing Underneath Existing Tunnel on Lanzhou-Chongqing Railway." Applied Mechanics and Materials 405-408 (September 2013): 1330–33. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.1330.

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Problems often exist in construction of transportation tunnels, such as the effect of new tunnels constructed close to existing structures. Solving this magnificent problem by carefully choosing tunnel construction methods will be beneficial to minimize effects on existing structures while ensuring the newly constructed tunnel is both time-consuming and economical. Three representative engineering methods-the benching tunneling method, the Center Diaphragm method and the Cross Diaphragm method-are compared in controlling the settlement of new tunnel vault and the deformation of the existing tunnel. Finally checking the simulation results by comparing with field measurement data.
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Yanli, Qi, Wen Shaoquan, Bai Mingzhou, Shi Hai, Li Pengxiang, Zhou Hao, and He Bohu. "Evaluation and Deformation Control Study on the Bias Pressure of Layered Rock Tunnels." Mathematical Problems in Engineering 2021 (August 5, 2021): 1–20. http://dx.doi.org/10.1155/2021/9937678.

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In the process of tunnel construction, the bias of layered rock mass tunnels has always been a prominent problem that troubles the construction and safe operation of tunnels. In this paper, a comprehensive method that combines monitoring technology and discrete element (3DEC) numerical simulation is proposed to analyze the deformation characteristics of the surrounding rock in the layered rock tunnel and the deformation law of the bias tunnel. The results indicate that the tunnel surrounding rock deformation in the study area showed the characteristics of bias. Based on the bias mechanism, the surrounding rock deformation law, the construction deformation control, and the optimization measures of layered rock mass in the bias tunnel were studied by means of combining monitoring technology with discrete element (3DEC) numerical simulation. Based on the research results, appropriate methods for controlling the deformation of the surrounding rock of the tunnel with comprehensive consideration of the anchor rod length, anchor rod angle, and anchor rod layout spacing were proposed. The method proposed in this paper could visually reveal the deformation characteristics of the surrounding rock of layered rock tunnels and the deformation law of bias tunnels. It could also better solve the problem of deformation control in the tunnel construction process. This approach provides a novel idea for special layered rock mass tunnel bias evaluation and deformation control parameter optimization and serves as a valuable reference for analogous engineering cases through engineering case analysis.
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Krasyuk, Aleksander, Ivan Lugin, and Elena Alferova. "STUDY OF AIR DISTRIBUTION AT ELONGATED TRANSPORT TUNNELS OF BAIKAL-AMUR MAINLINE." Interexpo GEO-Siberia 2, no. 4 (2019): 114–21. http://dx.doi.org/10.33764/2618-981x-2019-2-4-114-121.

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At the paper results of study of air distribution at elongated railway tunnels from piston effect of trains are represented. Simulation was carried out on the example of movement of freight train with length of 1 km at tunnels with length 3 and 6 km by numerical experiment in ANSYS Fluent software pack. As a result of the study, dependences of air pressure to front and rear surfaces of train on its position in the tunnel and on value of aerodynamic resistance of the gap between train and wall of the tunnel are obtained. The results have been used for development of quasi-dynamic model of piston effect of trains for solution of static air distribution problems on network models. Comparison of air discharge at various tunnel cross-sections obtained using ANSYS Fluent pack and network model shows satisfied repeatability. In that case, time of problem solution for a tunnel with length 3km on network model in 4·105 lower than on volume model. It has important practical meaning for multivariant calculations during designing of ventilation systems at railway tunnels.
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Knewtson, Sharon J. B., Rhonda Janke, M. B. Kirkham, Kimberly A. Williams, and Edward E. Carey. "Trends in Soil Quality Under High Tunnels." HortScience 45, no. 10 (October 2010): 1534–38. http://dx.doi.org/10.21273/hortsci.45.10.1534.

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Growers have indicated that changes in soil quality under production in high tunnels is an important problem, but these have not yet been quantified or critically assessed in the central Great Plains of the United States. We conducted surveys of grower perceptions of soil quality in their tunnels (n = 81) and compared selected soil quality indicators (salinity and particulate organic matter carbon) under high tunnels of varying ages with those of adjacent fields at sites in Kansas, Missouri, Nebraska, and Iowa in the United States. Fourteen percent of growers surveyed considered soil quality to be a problem in their high tunnels, and there were significant correlations between grower perceptions of soil quality problems and reported observations of clod formation and surface crusting and to a lesser extent surface mineral deposition. Grower perception of soil quality and grower observation of soil characteristics were not related to high tunnel age. Soil surface salinity was elevated in some high tunnels compared with adjacent fields but was not related to time under the high tunnel. In the soil upper 5 cm, salinity in fields did not exceed 2 dS·m−1 and was less than 2 dS·m−1 under 74% of high tunnels and less than 4 dS·m−1 in 97% of high tunnels. The particulate organic matter carbon fraction was higher in high tunnels than adjacent fields at 73% of locations sampled. Particulate organic matter carbon measured 0.11 to 0.67 g particulate organic matter per g of the total carbon under high tunnels sampled. Particulate organic matter carbon in the soil was also not correlated to age of high tunnel. Soil quality as measured in this study was not negatively impacted by use of high tunnel structures over time.
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Kim, Jaeyoung, and Sehong Min. "Study on Securing Safety Based on Emergency Power Dualization inside Road Tunnel." Journal of the Korean Society of Hazard Mitigation 20, no. 1 (February 29, 2020): 217–21. http://dx.doi.org/10.9798/kosham.2020.20.1.217.

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With continued economic development, movement and logistics to various parts of the country are increasing. Consequently, long tunnels in the mountains and the large city underground road tunnels under construction have become increasingly important. Further, the escalating number of road tunnels has resulted in the deepening of tunnels and an increase in the number of long tunnels. Because it is highly possible fora traffic accident inside a tunnel to cause further accidents, various safety improvement measures should be prepared. To resolve the problem, dualizing the emergency power of CCTVs (which perform the major functions of tunnel safety) is proposed for application in a plan to improve safety. This plan improves safety control inside the tunnel and contributes to its maintenance. This study was prompted by the expressway tunnel accidents that occurred in the Central Region Expressway in October 2015 and February 2016. The safety security system based on the dualization of the emergency power inside the road tunnel is being monitored, with its application in some tunnels as the pilot project of an actual lab concept. Moreover, measures on safety control inside the road tunnel can be prepared through the monitoring.
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Timchenko, R. A., D. A. Krishko, and S. О. Macyshin. "CONSTRUCTIVE SOLUTION OF A TUNNEL UNDER THE EXISTING HIGHWAY." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 2, no. 49 (October 17, 2017): 214–20. http://dx.doi.org/10.26906/znp.2017.49.845.

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Urban underground structures (shallow tunnels), which are usually built in conditions of urban area with heavy traffic, are considered. It was clarified that the reinforced concrete lining are performed of concrete, reinforced concrete, natural and artificial stones in most cases. The types of tunnels road cutting are given. The geometrical dimensions and characteristics of using materials in the construction of tunnels are given. It was established that the existing methods of tunnel construction do not allow to solve the problem in cramped conditions and intense traffic. The new constructive solution of the transverse tunnel under the existing highway was proposed. It is found that the proposed design of the transverse tunnel may be performed in cramped urban environments with the use of modern technological equipment and the proposed method of tunnel meets the requirements of strength, reliability, durability.
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Pan, Fei, and Sheng Guo Cheng. "Analysis of Deformation Mechanism and Control Technology of Soft Rock Tunnel with High Geostress." Applied Mechanics and Materials 638-640 (September 2014): 794–97. http://dx.doi.org/10.4028/www.scientific.net/amm.638-640.794.

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With the development of transportation construction, soft rock tunnel with high geostress construction has become a key problem to overcome of traffic engineering construction. In order to explore the deformation mechanism and control technology of soft rock tunnel with high geostress, Xiakou tunnel engineering as an example, the geological characteristics and deformation characteristics of the tunnel were analyzed, to obtain the deformation mechanism of soft rock tunnels with high geostress, and to develop deformation control technology, the results provide a basis and reference for the domestic and foreign the similar engineering construction.
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Li, Pan, and Xiaobo Qu. "Optimal Allocation of Tunnel Safety Provisions Based on a Quantitative Risk Assessment Model." Scientific Programming 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/9628095.

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This paper addresses the issue of optimally selecting the tunnel safety provisions. Tunnel safety provisions are the assets of urban road tunnels which are installed and implemented to reduce the tunnel risks, which are basically selected by expert judgment in practice. An optimization model is proposed to obtain the optimal solution for the selection of tunnel safety provisions. The objective function is to minimize the life cycle costs of tunnel safety provisions, which is subject to the requirements for tunnel safety provisions and the safety targets. Finally, by taking advantage of the special structure of the optimization model, a Bi-Section Search and Bound Algorithm (BSSBA) is designed to efficiently solve the problem.
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Shi, Zhenyue, Qingbiao Wang, Chuming Pang, Yueming Yuan, Fuqiang Wang, Hongxu Song, Jichang Liu, Zijie Zhang, Rongbo Sun, and Yan Liu. "Establishment and Application of the Spatial Decomposition Method (SDM) for Tunnels Passing Through Large Karst Caves." Applied Sciences 10, no. 20 (October 15, 2020): 7204. http://dx.doi.org/10.3390/app10207204.

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Karst tunnels commonly pass through large karst caves during their construction and operation. Although treatment technologies are relatively mature, a systematic treatment method to guide the selection of treatment technologies is lacking. To solve this problem, a spatial decomposition method (SDM) of large karst caves is proposed that is based on analyzing the spatial relationship between tunnels and karst caves and summarizing the relevant treatment techniques. In this method, the space between the tunnel and the cavern is divided into eight parts using a space dividing line (SDL), which makes the spatial position relationship between the tunnel and cavern more intuitive. A geometric model of the SDM is established, and the numerical values of each geometric parameter are determined by field surveys and drawings. Constructing a three-dimensional spatial diagram by applying relevant parameters to the geometric model provides a reference for selecting a treatment technology. The SDM of the arch top, arch bottom, and two wings matching the treatment technology is proposed. Seven principles of technical selection—namely, safety, convenience, scientificity, sustainability, economy, feasibility, and openness—are mentioned in order to overcome the difficulty of technology selection due to such factors as technological diversity, materials, equipment, and environment. Finally, the SDM is used to solve the problem of the Shangyuan tunnel passing through a large karst cave. The implementation of the SDM in tunnel construction would represent a significant breakthrough and has important engineering value in solving the problem of tunnel passes through large karst caves.
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Kiyanitsa, Lavrentiy A., and Ivan V. Lugin. "JUSTIFICATION OF THE PARAMETERS OF CHILLING ZONE OF LINING OF NEAR-ENTRANCE SITE OF LONG RAILWAY TUNNELS IN COLD SEASON." Interexpo GEO-Siberia 2 (July 8, 2020): 57–63. http://dx.doi.org/10.33764/2618-981x-2020-2-57-63.

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When operating long railway tunnels in harsh climatic conditions of Siberia and the Far East, there is a problem of tunnel lining freezing on near-entrance sites in the cold season. Due to the cyclical effects of negative outside temperatures, the surface layer of tunnel lining is constantly freezing and thawing, which causes rapid frost deterioration. This effect is especially pronounced for tunnels with closing near-entrance gates and one-way train traffic on the exit site. This is explained by the fact that at each train passage through the exit site, a significant amount of cold atmospheric air enters the tunnel. The length of chilling zone and the temperature of tunnel lining in the “outside air - tunnel lining” contact zone from the exit site deep into the tunnel, depending on the technological and climatic parameters of the tunnel are justified by analyzing the results of computational experiment. The correctness of obtained regularities is justified by the convergence of experimental results and analytical calculations based on the displacement method.
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Dissertations / Theses on the topic "Tunnel problem"

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Ali, Mehmeti Felix. "Transient tunnel effect and Sommerfeld problem waves in semi-infinite structures /." Berlin : Akad.-Verl, 1996. http://catalog.hathitrust.org/api/volumes/oclc/38144499.html.

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Yu, Chi-Wen. "Creep characteristics of soft rock and modelling of creep in tunnel : determination of creep characteristics of soft rock and development of non-linear creep analysis code for squeezing tunnel problem." Thesis, University of Bradford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.586717.

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Squeezing or time-dependent creep deformation of rock has been encountered frequently in tunnels. It is particularly common in tunnels excavated in very soft rock or heavily fractured rock under significant in-situ stresses. In Taiwan, due to the inferior geological setting and the young sedimentary rock formations, squeezing in tunnels was found to be a very common problem from the recent case histories of some large span road tunnels. This research reviewed the existing rock creep models, and an adequate creep model for representing the creep behaviour of soft rock or a weak rock mass in general was selected based on testing data of some soft rock cores. A numerical code was developed and validated by using tunnel physical model test. Actual tunnel case histories were also used to develop the creep analysis method for practical engineering purpose.
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Brown, Kenneth Alexander. "Understanding and Exploiting Wind Tunnels with Porous Flexible Walls for Aerodynamic Measurement." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/73363.

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The aerodynamic behavior of wind tunnels with porous, flexible walls formed from tensioned Kevlar has been characterized and new measurement techniques in such wind tunnels explored. The objective is to bring the aerodynamic capabilities of so-called Kevlar-wall test sections in-line with those of traditional solid-wall test sections. The primary facility used for this purpose is the 1.85-m by 1.85-m Stability Wind Tunnel at Virginia Tech, and supporting data is provided by the 2-m by 2-m Low Speed Wind Tunnel at the Japanese Aerospace Exploration Agency, both of which employ Kevlar-wall test sections that can be replaced by solid-wall test sections. The behavior of Kevlar fabric, both aerodynamically and mechanically, is first investigated to provide a foundation for calculations involving wall interference correction and determination of the boundary conditions at the Kevlar wall. Building upon previous advancements in wall interference corrections for Kevlar-wall test sections, panel method codes are then employed to simulate the wind tunnel flow in the presence of porous, flexible Kevlar walls. An existing two-dimensional panel method is refined by examining the dependency of correction performance on key test section modeling assumptions, and a novel three-dimensional method is presented. Validation of the interference corrections, and thus validation of the Kevlar-wall aerodynamic performance, is accomplished by comparing aerodynamic coefficients between back-to-back tests of models carried out in the solid- and Kevlar-wall test sections. Analysis of the test results identified the existence of three new mechanisms by which Kevlar walls cause wall-interference. Additionally, novel measurements of the boundary conditions are made during the Kevlar-wall tests to characterize the flow at the boundary. Specifically, digital image correlation is used to measure the global deformation of the Kevlar walls under wind loading. Such data, when used in conjunction with knowledge of the pre-tension in the Kevlar wall and the material properties of the Kevlar, yields the pressure loading experienced by the wall. The pressure loading problem constitutes an inverse problem, and significant effort is made towards overcoming the ill-posedness of the problem to yield accurate wall pressure distributions, as well as lift measurements from the walls. Taken as a whole, this document offers a comprehensive view of the aerodynamic performance of Kevlar-wall test sections.
Ph. D.
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Scheidt, João Eduardo Cardoso. "O problema do tunel de congelamento." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306872.

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Orientador: Clovis Perin Filho
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Científica
Made available in DSpace on 2018-07-21T08:33:25Z (GMT). No. of bitstreams: 1 Scheidt_JoaoEduardoCardoso_M.pdf: 2581014 bytes, checksum: c1f985e905d424059b556edf8774af28 (MD5) Previous issue date: 1996
Resumo: Túneis de congelamento são equipamentos utilizados pela industria alimentícia para o condicionamento térmico de produto tais como iogurte, sorvete, leite, carne e derivados. Assim, geralmente estão no fim do processo de produção de produtos altamente perecíveis. Quando um túnel representa m gargalo do processo, ele causa transtornos à produção que podem até interrompê-la. Este trabalho visa a abordagem do problema de operação eficiente e túneis de congelamento quanto ao aspecto de carregamento. Primeiramente abordamos o problema estático e suas relaxações e restrições. No problema estático determinístico, o instante de chegada das bandejas de produtos e o tempo de exposição necessário para seu condicionamento são conhecidos de antemão. Deve-se, então, programar por completo o carregamento do refrigerador definindo, para cada bandeja, em que nível do túnel deve ser colocada ou se deve ser rejeitada. Resultados teóricos são obtidos, particularmente para o caso (relaxado) do refrigerador de gavetas. Várias possibilidades de abordagem do problema estático são discutidas. Em seguida abordamos o problema dinâmico, onde não se dispõe do conhecimento prévio dos parâmetros de cada bandeja. Estes só ficam definidos a partir da chegada de cada bandeja, quando então a decisão quanto ao carregamento ou rejeição da bandeja deve ser tomada. Para o problema dinâmico são apresentadas várias políticas, que são testadas num caso real e em cenários hipotéticos nele baseados. Para avaliação de desempenho das políticas usamos limites' inferiores calculados com base no desenvolvimento teórico do problema estático. Os resultados são muito satisfatórios para uma classe de políticas a que chamamos de encadeamento.
Abstract: Freezing tunnels are food industry facilities for conditioning of meat, ice-cream, milk, yogurt, etc. They are very unwished botlenecks because they are positioned at the end of the production process of highly perishable items (low in-process inventory). The freezing tunnel loading problem is that of maximizing its production in terms of the amount of frozen trays of products. The purpose of this study is to model this problem and develop methods for solving its static and dynamic versions. In the static problem, the arrival time and the conditioning time of each tray are known in advance for the entire loading period. One should then completely schedule the loading of the tunnel. Each tray must be assigned to a position in the tunnel or be rejected. . We discuss several approaches and show some theoretical results for relaxed problems. In the dynamic problem, the arrival and the demand of trays are not known in advance. In this case, the decisions must take place at the arrival times. Several policies are developed. Some real case based scenarios are used for testing the policies. The study shows the potential gains with the application of some policies, mainly those ofthe class we named 'chain policies'.
Mestrado
Mestre em Matemática Aplicada
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Yeung, Min, and 楊勉. "Means to control the traffic problems of the cross harbour tunnel: with focus on traffic management and tollpricing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31951132.

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Smith, David Matthew. "The Channel Tunnel rail link : opportunities and problems for regional economic development." Thesis, University of Plymouth, 1992. http://hdl.handle.net/10026.1/1734.

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The regional economic impact of the Channel Tunnel has engendered much public and private sector interest. Previous studies examining the regional implications of the Tunnel have argued that related development pressures will be largely confined to South East England, further widening the "North-South" divide. Economic Potential Analysis was earlier employed by Clark el. al. (1969) and Keeble et. al. (1982a) to model the geographical impact of the Tunnel on the relative accessibility of the UK regions. The conclusions drawn from these studies support the proposition that the South East would gain at the expense of the more peripheral regions. However, the important implications of a rail-only Tunnel have yet to be modelled. The results of the present study show that opportunities created by the Tunnel could be spread more evenly than had previously been predicted. However, following a review of the legislative and policy environment of the Tunnel and related infrastructure, it is argued that as a result of British Government inaction the more peripheral UK regions are likely to be unable to maximise any potential benefits created. Nonetheless, the overall regional economic impact of the Tunnel will depend ultimately on the reactions of the business community (Pieda 1989a&b). The findings of a questionnaire survey carried out for this thesis reveal a considerable degree of similarity in perceptions and anticipated usage of the Tunnel for companies in the South East and South West, including the "Far South West". If this similarity is apparent after the Tunnel opens, the regional economic structure of the UK might only be marginally affected.
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Buckingham, Richard James. "Problems associated with water ingress into hard rock tunnels." Thesis, Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B42577184.

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Chiu, Shuk-han. "A study of the problem of imbalance distribution of traffic amongst the three road harbour crossings." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36445423.

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Shrestha, Gyanendra Lal. "Stress Induced Problems in Himalayan Tunnels with Special Reference to Squeezing." Doctoral thesis, Norwegian University of Science and Technology, Department of Materials Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1802.

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There is a huge potential of underground constructions in the Himalayan region for hydropower, transport systems and conservation of environment. However, the tectonic activities have resulted with a fragile regional geology. Moreover, the high mountainous topography causes high overburden pressure in the underground structures causing squeezing and other stability problems. Thus the huge tunnelling potential can only be materialised by applying professional and scientific approaches.

This thesis focuses on the stress induced problems with special reference to squeezing. Main objectives of this study were to review and check validity of the available tunnel stability assessment methods, to carry out relevant laboratory tests and interpret the results, and to use a numerical modelling code. In the present study, two projects have been used as case studies, both located in Nepal Himalayan region. These are Khimti1 hydropower project - a completed project; and Melamchi water supply project - yet to be constructed. Both projects include tunnels through series of weak rock mass strata with high overburden stress.

One of the factors that may cause stability problems in a tunnel is the stress level acting around the opening. A tunnel fails when the stress exceeds the strength of rock mass. If the stress level does not exceed the rock mass strength, but is sufficient up to a critical level to cause creep, it may lead to rock failure after some time. In a tunnel stability assessment, the determination of the critical stress level is important. Creep tests were carried out on the Melamchi gneiss and the critical stress level has been determined.

The resulted creep test curves were calibrated to obtain rheological parameters. Tunnel deformations including time-effect, were calculated for a given stress level. Based on the creep test results at various uniaxial stress levels, an equation is obtained for the relation between the strain rate and stress level. Back analyses have been carried out using the available empirical, semi-analytical and analytical methods and FLAC3D code; the results have been found to be in close agreement with the tunnel convergence measurements in the Khimti tunnel. So these methods were used in the Melamchi tunnel design.

In the 66 squeezing tunnel cases from around the world and the Khimti case study, it was observed that the rock mass strength (corresponding to rock type) has a significant influence on squeezing phenomena. Thus the available squeezing prediction criteria based on the rock mass classification alone, need to be updated by including rock mass strength as well. Similarly, ‘valley side effect of topography’ has been found to influence the tunnel deformation in the Khimti project. It has opened an area for a further study to correlate the valley side effect of topography to the stress increase in the tunnel.

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Yeung, Min. "Means to control the traffic problems of the cross harbour tunnel : with focus on traffic management and toll pricing /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19668788.

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Books on the topic "Tunnel problem"

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Transient tunnel effect and Sommerfeld problem: Waves in semi-infinite structures. Berlin: Akad.-Verl., 1996.

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Molewski, Paweł. Rynna Gopła--problem jej genezy i roli w odpływie wód roztopowych podczas zlodowacenia vistuliańskiego = Gopło subglacial channel (tunnel valley)--problem of its origin and participation in meltwater outflow during Vistulian glaciation. Toruń: Tow. Nauk. w Toruniu, 1999.

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Britcher, Colin P. Applications of magnetic suspension technology to large scale facilities: Progress, problems and promises. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Dubner, Stephen J. Think Like a Freak: How to think smarter about almost everything. Great Britain: Allen Lane, 2014.

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Fried, Scott M. Light at the end of the carpal tunnel: A guide to understanding and relief from the pain of nerve problems. East Norriton, PA: Healing Books, 1998.

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Institut teoreticheskoĭ i prikladnoĭ mekhaniki (Akademii͡a︡ nauk SSSR), ed. Mezhdunarodnyĭ seminar Problemy modelirovanii͡a︡ v aėrodinamicheskikh trubakh, 25-29 ii͡u︡li͡a︡ 1988 g., Novosibirsk, SSSR. Novosibirsk: Akademii͡a︡ nauk SSSR, Sibirskoe otdelenie, Institut teoreticheskoĭ i prikladnoĭ mekhaniki, 1989.

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Tunceli'de Sünni olmak: Ulusal ve yerel kimlik öğelerinin Tunceli-Pertek'te etnolojik tetkiki. Cağaloğlu, İstanbul: Berfin Yayınları, 2010.

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Mehemeti, Felix Ali, and Felix Ali Mehmeti. Transient Tunnel Effect and Sommerfield Problem: Waves in Semi-Infinite Structures (Mathematical Research). John Wiley & Sons Ltd (Import), 1997.

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Morshead, Anne. Blind drunk: Light at the end of the tunnel for anyone living with a loved one's alcohol problem. 2013.

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Cornblath, David R., and Richard A. C. Hughes. Peripheral neuropathy. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199658602.003.0013.

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Disorders of peripheral nerves are one of the most common neurological problems today and include the increasing number of people with diabetes worldwide and those with inherited neuropathy, toxic neuropathy, carpal tunnel syndrome, inflammatory neuropathy, radiculopathies, and, increasingly, traumatic nerve injuries. Neuropathic pain is a growing problem without solution. In this chapter, ten landmark papers in peripheral nerve disorders have been selected, covering Bell’s palsy, Charcot-Marie-Tooth disease, carpal tunnel syndrome, paraneoplastic neuropathy, neurophysiology, familial amyloid polyneuropathy, chronic inflammatory demyelinating polyradiculoneuropathy, toxic neuropathy, diabetic neuropathy, and Guillain–Barré syndrome. These important papers set the stage for many subsequent advances in the field but may be forgotten now, so they are brought to the reader’s attention.
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Book chapters on the topic "Tunnel problem"

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Jahed Armaghani, Danial, and Aydin Azizi. "Developing Statistical Models for Solving Tunnel Boring Machine Performance Problem." In Applications of Artificial Intelligence in Tunnelling and Underground Space Technology, 33–53. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1034-9_3.

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Youngs, E. G. "The seepage exclusion problem for tunnel cavities in the saturated capillary fringe." In Environmental Mechanics: Water, Mass and Energy Transfer in the Biosphere, 71–78. Washington, D. C.: American Geophysical Union, 2002. http://dx.doi.org/10.1029/129gm07.

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Hurteau, R., G. Chevrette, and A. Piche. "Tunnel Following Problem of an Autonomous LHD Vehicle Operating in an Underground Mine." In CAD/CAM Robotics and Factories of the Future, 120–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-52326-7_21.

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Hurteau, R., G. Chevrette, and A. Piche. "Tunnel Following Problem of an Autonomous LHD Vehicle Operating in an Underground Mine." In CAD/CAM Robotics and Factories of the Future, 120–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-39962-0_21.

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Toklu, Yusuf Cengiz, Gebrail Bekdaş, Aylin Ece Kayabekir, Sinan Melih Nigdeli, and Melda Yücel. "Total Potential Optimization Using Hybrid Metaheuristics: A Tunnel Problem Solved via Plane Stress Members." In Advances in Structural Engineering—Optimization, 221–36. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-61848-3_8.

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Ledesma, A., and A. Gens. "Inverse Analysis of a Tunnel Excavation Problem from Displacement and Pore Water Pressure Measurements." In Material Identification Using Mixed Numerical Experimental Methods, 163–72. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-1471-1_17.

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Yano, T., Kazuaki Hatanaka, and Tsutomu Saito. "Investigation of Nozzle Starting Problem and Its Application to Construct a Supersonic Wind Tunnel." In 29th International Symposium on Shock Waves 1, 379–84. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16835-7_59.

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Spekreijse, S. P. "Nonequilibrium Flow in a Hypersonic Wind Tunnel Nozzle." In Hypersonic Flows for Reentry Problems, 1159–73. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76527-8_76.

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Cetto, A. M., and L. de la Peña. "Stochastic Approach to the Tunnel Effect." In New Developments on Fundamental Problems in Quantum Physics, 85–101. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5886-2_12.

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Henningsen, Dierk. "Geologische Probleme beim Talsperren-, Tunnel- und Kavernenbau." In Geologie für Bauingenieure, 75–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-97377-2_6.

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Conference papers on the topic "Tunnel problem"

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Hsieh, Y. M., and A. J. Whittle. "Efficient Computation for a Complex Tunnel Excavation Problem." In GeoCongress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40803(187)183.

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Xiao Chen, Yuntian Pan, Yiming Wu, and Guoxin Zheng. "Research on Doppler spread of multipath channel in subway tunnel." In 2014 IEEE International Conference on Communication Problem-Solving (ICCP). IEEE, 2014. http://dx.doi.org/10.1109/iccps.2014.7062216.

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Xiaoyu Yin, Yuntian Pan, Yiming Wu, and Guoxin Zheng. "Analysis of spread spectrum sliding correlator channel sounding under subway tunnel environment." In 2014 IEEE International Conference on Communication Problem-Solving (ICCP). IEEE, 2014. http://dx.doi.org/10.1109/iccps.2014.7062223.

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Sivaprasad, G., R. Ramprakash, G. Rajesh, and R. Arun Kumar. "Starting Shock Swallowing in a Supersonic Wind Tunnel: A Shock Transition Problem?" In Proceedings of the 32nd International Symposium on Shock Waves (ISSW32 2019). Singapore: Research Publishing Services, 2019. http://dx.doi.org/10.3850/978-981-11-2730-4_0312-cd.

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Lin, Sheam-Chyun, Hsien-Chang Shih, Fu-Sheng Chuang, Ming-Lun Tsai, Harki Apri Yanto, and Cheng-Ju Chang. "Derivation of Position-Probability Density for the Transient Nano-Tunnel Problem in SET." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24769.

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This theoretical investigation intends to study the nano-tunnel problem of the single electron transistor (SET), which is one of the most important components in the nano-electronics industry. With a combined effort of quantum mechanics and similarity parameter, the partial differential equation of transient position-probability density is attained and can be applied to predict the electron’s position inside the nano tunnel. Also, an appropriate set of the initial and the boundary conditions is set up in accordance to the actual electron behavior for solving this PDE of probability density function. Thereafter, a simple, closed-form solution for the probability density is obtained and expressed in terms of the error function for a new similarity variable η. Note that this analytic similarity solution is easy to perform the calculation and suitable for any further mathematical operation, such as the optimization applications. In addition, it is shown that these predications are reasonable and in good agreement to the physical meanings, which are evaluated from both microscopic and macroscopic viewpoints. In conclusions, this is an innovative approach by using the Schro¨dinger equation directly to solve the nano-tunnel problem. Moreover, with the aids of this analytic position-probability-density solution, it is illustrated that the free single electron in the SET’s tunnel can only appear at some specified regions, which are defined by a dimensionless parameter η within a range of 0 ≤ η ≤ 2. This result can be served as a valuable design reference for setting the practical manufacture requirement.
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Yamada, Kentaro, Akiyoshi Iida, and Akisato Mizuno. "Numerical Estimation of Exhaust Gas Emission From Tunnel Portal With Forced Extraction System." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37126.

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In recent years, exhaust gas emission out of tunnel portals has been a problem. In order to maintain the environment around the tunnel portal, a concentrated exhaustion system is installed in some tunnels. In the area between the suction port and the portal, the air flows in the opposite direction to the traffic, so that the pollutant is sucked toward the exhaustion port. In order to grasp the detailed phenomena, the authors investigated quantitatively the extent of the pollutant, which is brought out of the tunnel portal, in terms of a three-dimensional numerical analysis. This simulation system includes a sliding mesh algorithm in order to express the movement of vehicles. A typical result of the suction velocity of 1.0 m/s showed that almost no emission out of the tunnel is observed in small car traffic.
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Deng, Tao, Lingxiao Wu, and Jingwen Lin. "Complex Variable Solution for a Tunnel Excavation Problem by Considering Lining Inner Pressure." In Geo-Shanghai 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413449.012.

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Ning, DU, XU Wen-jia, XIANG Zu-tao, HAN Ya-nan, ZHOU Pei-peng, YANG Da-ye, and XIANG Chang-yuan. "Research on Key Technical Problem of System Commissioning of Sutong GIL Utility Tunnel Project." In 2020 5th Asia Conference on Power and Electrical Engineering (ACPEE). IEEE, 2020. http://dx.doi.org/10.1109/acpee48638.2020.9136418.

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Zheng, Ruixiang, Mian Li, Zhaoguang Wang, and Qiang Zhang. "Control of Blow-Down Wind Tunnel Using Combined Extended and Nonlinear Predictive Filters." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42908.

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A blow-down wind tunnel is a typical nonlinear time-variant system facing the coupling of the pressure and temperature during a short duration. The control of blow-down wind tunnels has been discussed for long time and a satisfactory general solution to this problem is still under developing. This paper aims to model the internal relationship of the state variables of the wind tunnel by using thermodynamic theories. With the developed model, a new control method combining Extended Kalman Filter (EKF) together with auxiliary Nonlinear Predictive Filter (NPF) is proposed to improve the control performance of the blow-down wind tunnel controller in terms of precision and robustness. The transient coupling effects between the pressure and temperature are fully considered by the proposed approach. The results both from the simulation and experiments are consistent and prove that the EKF combined together with NPF can work better than previously proposed EKF-based method.
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Blanco, Eduardo, Javier Cueto, Joaqui´n Ferna´ndez, and Rau´l Barrio. "Numerical Simulation of the Backlayer Critical Velocity in the Memorial Tunnel Test (MTFVTP)." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55256.

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Road tunnels constitute key elements in the traffic net, especially for the long distance road transportation but also in the large urban areas. Although security preventions have permitted a relatively low index of accidents in tunnels, the analysis of the accidents in road tunnels during the last years shows an increment in both the number of cases and their gravity. In the case of fires, the control of the smoke propagation becomes crucial because the major risk for people is smoke inhalation rather than the direct exposure to the fire itself. Besides, a quick control of the fire requires that the access and evacuation routes are maintained without smoke. However, research in this field has been limited by the difficulties inherent in the problem, and so there are few experimental data available. This paper pursues the study of the control of the smoke propagation in tunnel roads with a longitudinal air stream. The methodology is based on the numerical simulation of the time evolution of the air and smoke flows induced after the onset of localized fires of different magnitude. Specifically, 10, 20, 50 and 100 MW fires were simulated. A general purpose computational fluid dynamics software is used for this investigation, due to its ability to model multi-species three-dimensional unsteady flows. The general purpose of the paper is the refinement and contrast of a numerical procedure for the simulation of fire tunnels with natural and longitudinal ventilation, as the particular case with the most complex and restrictive conditions, and the use of such procedure to study the backlayering phenomenon. The obtained results were compared with the natural and longitudinal ventilation tests of the Memorial Tunnel test as well as with previous studies.
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Reports on the topic "Tunnel problem"

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Sloan, Steven, Shelby Peterie, Richard Miller, Julian Ivanov, J. Schwenk, and Jason McKenna. Detecting clandestine tunnels by using near-surface seismic techniques. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40419.

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Geophysical detection of clandestine tunnels is a complex problem that has been met with limited success. Multiple methods have been applied spanning several decades, but a reliable solution has yet to be found. This report presents shallow seismic data collected at a tunnel test site representative of geologic settings found along the southwestern U.S. border. Results demonstrate the capability of using compressional wave diffraction and surface-wave backscatter techniques to detect a purpose-built subterranean tunnel. Near-surface seismic data were also collected at multiple sites in Afghanistan to detect and locate subsurface anomalies (e.g., data collected over an escape tunnel discovered in 2011 at the Sarposa Prison in Kandahar, Afghanistan, which allowed more than 480 prisoners to escape, and data from another shallow tunnel recently discovered at an undisclosed location). The final example from Afghanistan is the first time surface-based seismic methods have detected a tunnel whose presence and location were not previously known. Seismic results directly led to the discovery of the tunnel. Interpreted tunnel locations for all examples were less than 2 m of the actual location. Seismic surface wave backscatter and body-wave diffraction methods show promise for efficient data acquisition and processing for locating purposefully hidden tunnels within unconsolidated sediments.
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Nakibly, G., and F. Templin. Routing Loop Attack Using IPv6 Automatic Tunnels: Problem Statement and Proposed Mitigations. RFC Editor, August 2011. http://dx.doi.org/10.17487/rfc6324.

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Elhadj, S. Materials response under hypersonic flow conditions probed by multi-modal diagnostics in a benchtop wind tunnel. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1669239.

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Zachry, Anne, J. Flick, and S. Lancaster. Tune Up Your Teaching Toolbox! University of Tennessee Health Science Center, 2016. http://dx.doi.org/10.21007/chp.ot.fp.2016.0001.

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Occupational therapy (OT) educators strive to prepare entry-level practitioners who have the expertise to meet the diverse health care needs of society. A variety of instructional methods are used in the University of Tennessee Health Science Center (UTHSC) MOT program, including traditional lecture-based instruction (LBI), problem-based learning (PBL), team-based learning (TBL), and game-based learning (GBL). Research suggests that active learning strategies develop the critical thinking and problem-solving skills that are necessary for effective clinical reasoning and decision-making abilities. PBL, TBL, GBL are being successfully implemented in the UTHSC MOT Program to enhance the learning process and improve student engagement.
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Ahrens L., J. Gabusi, and W. van Asselt. To Study problems associated with maintaining circulating beam on a 1 GeV flattop, in particular to construct such a flattop, accelerate beam across it, and measure tunes and chromaticities if possible. Office of Scientific and Technical Information (OSTI), November 1985. http://dx.doi.org/10.2172/1130933.

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