Academic literature on the topic 'Absorbing Boundaries'

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Journal articles on the topic "Absorbing Boundaries"

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Festa, G. "PML Absorbing Boundaries." Bulletin of the Seismological Society of America 93, no. 2 (April 1, 2003): 891–903. http://dx.doi.org/10.1785/0120020098.

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Marchewka, A., and Z. Schuss. "Feynman integrals with absorbing boundaries." Physics Letters A 240, no. 4-5 (April 1998): 177–84. http://dx.doi.org/10.1016/s0375-9601(98)00107-8.

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Ingold, J. H. "Nonequilibrium electron transport near absorbing boundaries." Physical Review A 44, no. 6 (September 1, 1991): 3822–30. http://dx.doi.org/10.1103/physreva.44.3822.

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Kosloff, R., and D. Kosloff. "Absorbing boundaries for wave propagation problems." Journal of Computational Physics 63, no. 2 (April 1986): 363–76. http://dx.doi.org/10.1016/0021-9991(86)90199-3.

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Buchman, Luisa T., and Olivier C. A. Sarbach. "Towards absorbing outer boundaries in general relativity." Classical and Quantum Gravity 23, no. 23 (October 19, 2006): 6709–44. http://dx.doi.org/10.1088/0264-9381/23/23/007.

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SAIGO, Muneharu, Hiroyuki IWAMOTO, and Nobuo TANAKA. "Wave Absorbing Control of Beam Near Boundaries." Transactions of the Japan Society of Mechanical Engineers Series C 73, no. 734 (2007): 2719–25. http://dx.doi.org/10.1299/kikaic.73.2719.

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Hipke, Arthur, Sven Lübeck, and Haye Hinrichsen. "Absorbing boundaries in the conserved Manna model." Journal of Statistical Mechanics: Theory and Experiment 2009, no. 07 (July 10, 2009): P07021. http://dx.doi.org/10.1088/1742-5468/2009/07/p07021.

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Bach, Eric, Susan Coppersmith, Marcel Paz Goldschen, Robert Joynt, and John Watrous. "One-dimensional quantum walks with absorbing boundaries." Journal of Computer and System Sciences 69, no. 4 (December 2004): 562–92. http://dx.doi.org/10.1016/j.jcss.2004.03.005.

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TANIYAMA, Hisashi. "Absorbing Boundaries Using Shape Functions Representing Wave Propagation." Journal of Japan Association for Earthquake Engineering 20, no. 6 (2020): 6_15–6_24. http://dx.doi.org/10.5610/jaee.20.6_15.

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Lee, C. F., R. T. Shin, J. A. Kong, and B. J. McCartin. "Absorbing Boundary Conditions on Circular and Elliptical Boundaries." Journal of Electromagnetic Waves and Applications 4, no. 10 (January 1, 1990): 945–62. http://dx.doi.org/10.1163/156939390x00690.

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Dissertations / Theses on the topic "Absorbing Boundaries"

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Fan, Rong. "Random Walk With Absorbing Barriers Modeled by Telegraph Equation With Absorbing Boundaries." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1588.

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Organisms have movements that are usually modeled by particles’ random walks. Under some mathematical technical assumptions the movements are described by diffusion equations. However, empirical data often show that the movements are not simple random walks. Instead, they are correlated random walks and are described by telegraph equations. This thesis considers telegraph equations with and without bias corresponding to correlated random walks with and without bias. Analytical solutions to the equations with absorbing boundary conditions and their mean passage times are obtained. Numerical simulations of the corresponding correlated random walks are also performed. The simulation results show that the solutions are approximated very well by the corresponding correlated random walks and the mean first passage times are highly consistent with those from simulations on the corresponding random walks. This suggests that telegraph equations can be a good model for organisms with the movement pattern of correlated random walks. Furthermore, utilizing the consistency of mean first passage times, we can estimate the parameters of telegraph equations through the mean first passage time, which can be estimated through experimental observation. This provides biologists an easy way to obtain parameter values. Finally, this thesis analyzes the velocity distribution and correlations of movement steps of amoebas, leaving fitting the movement data to telegraph equations as future work.
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Iyaniwura, Sarafa Adewale. "Mathematical modelling of partially absorbing boundaries in biological systems." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58907.

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This project presents a mathematical framework for identifying partially permeable biological boundaries, and estimating the rate of absorption of diffusing objects at such a boundary based on limited experimental data. We used partial differential equations (PDEs) to derive probability distribution functions for finding a particle performing Brownian motion in a region. These distribution functions can be fit to data to infer the existence of a boundary. We also used the probability distribution functions together with maximum likelihood estimation to estimate the rate of absorption of objects at the boundaries, based on simulated data. Furthermore, we consider a switching boundary and provide a technique for approximating the boundary with a partially permeable boundary.
Science, Faculty of
Graduate
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Hildebrand, Paul. "The use of absorbing boundaries in the analysis of bankruptcy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ34550.pdf.

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Böhm, Walter. "The Correlated Random Walk with Boundaries. A Combinatorial Solution." Department of Statistics and Mathematics, WU Vienna University of Economics and Business, 1999. http://epub.wu.ac.at/1058/1/document.pdf.

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The transition fundions for the correlated random walk with two absorbing boundaries are derived by means of a combinatorial construction which is based on Krattenthaler's Theorem for counting lattice paths with turns. Results for walks with one boundary and for unrestricted walks are presented as special cases. Finally we give an asymptotic formula, which proves to be useful for computational purposes. (author's abstract)
Series: Forschungsberichte / Institut für Statistik
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Böhm, Walter, and Kurt Hornik. "On Two-Periodic Random Walks with Boundaries." Department of Statistics and Mathematics, WU Vienna University of Economics and Business, 2008. http://epub.wu.ac.at/936/1/document.pdf.

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Two-periodic random walks are models for the one-dimensional motion of particles in which the jump probabilities depend on the parity of the currently occupied state. Such processes have interesting applications, for instance in chemical physics where they arise as embedded random walk of a special queueing problem. In this paper we discuss in some detail first passage time problems of two-periodic walks, the distribution of their maximum and the transition functions when the motion of the particle is restricted by one or two absorbing boundaries. As particular applications we show how our results can be used to derive the distribution of the busy period of a chemical queue and give an analysis of a somewhat weird coin tossing game.
Series: Research Report Series / Department of Statistics and Mathematics
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Feltrin, Glauco. "Absorbing boundaries for the time-domain analysis of dam-reservoir-foundation systems /." Basel ; Boston ; Berlin : Birkhäuser, 1997. http://e-collection.ethbib.ethz.ch/show?type=incoll&nr=808.

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Pasalic, Damir. "Absorbing boundaries in frequency domain TLM method and their application to analysis of planar structures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0014/MQ52805.pdf.

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Olsson, Daniel. "Numerical simulations of energy absorbing boundaries for elastic wave propagation in thick concrete structures subjected to impact loading." Thesis, Umeå universitet, Institutionen för fysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-58015.

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As many of the world’s nuclear power plants are near the end of their supposed life span a need arise to assess the components crucial to the safety of these plants. One of these crucial components is the concrete reactor confinement; to assess its condition, non-destructive testing (NDT) is an attractive method. Traditional testing of concrete structures has comprised of drilling out a sample and performing stress tests on it, but because of the radioactive environment inside the containment this method is far from ideal. NDT is of course possible to use at any structure but at reactor containments the benefits from not creating holes in the structure are prominent; NDT is also an attractive option from an esthetical point of view because it leaves the structure intact. The NDT method pertaining to this study is the impact echo method which comprise of applying a force on the structure, usually a hammer blow, and measuring the response with a receiver. The impact will excite waves propagating in the structure which gives rise to Lamb modes. Lamb modes are structural oscillations of the wall and it is the frequency of these modes that are used to determine the thickness of the wall. The elastic properties of the structure can in turn be obtained by measuring the velocities of the waves propagation. It is also possible to use the impact echo method to detect irregularities in the structure such as cracks or delamination. To simulate the dynamics of a system using NDT numerical methods such as finite element modeling (FEM) is often used. The purpose of this study is to assess the possibility to utilize absorbing layers using increasing damping (ALID) in models to reduce the computational time of FEM analyses. ALIDs are used at the edges to simulate an infinite system and are thus supposed to cancel out incoming waves to prevent unwanted reflection from the edges. The models in this study have all pertained to two dimensional plates utilizing infinitesimal strain theory; the decrease in computational time is significant when using ALIDs and for three dimensional models it would be even more so. The ALIDs are specified by length and maximum mass proportional Rayleigh damping (CMmax), in this study three different lengths are tested, 0.5, 1.5 and 4.5 m for CMmax ranging from 103 to 2*105 Ns/m. The damping is increased with increasing distance into the ALID with specified maximum value at the back edge. However, it should be noted that the increase in damping causes difference in impedance between elements and if this difference is too large it will cause reflections of waves at the boundary between the elements. The ALID must thus be defined so that it sufficiently cancels out the wave without causing unwanted reflections due to impedance differences. The conclusion is that the 0.5 m long ALID does not provide good results for any choice of maximum mass proportional Rayleigh damping. Both the 1.5 and 4.5 m long ALIDs are, however, concluded to be applicable; the 1.5 m ALID having 2*104 < CMmax <5*104 Ns/m and the 4.5 m ALID having 5*103 < CMmax < 104 Ns/m are choices that have shown promise in the performed simulations. The hope is that the results obtained in this study will aid in the development of numerical analysis techniques for NDT methods that can be used in the construction of new reactor confinements and/or maintenance of existing reactor confinements and other thick concrete structures.
Många av världens kärnkraftverk närmar sig slutet på sin beräknade livslängd och ett behov uppstår då att kunna utvärdera de komponenter som är väsentliga för säkerheten på dessa verk. Reaktoromslutningen i betong är en av dessa komponenter och oförstörande provning (NDT) är en attraktiv metod för att bedöma dess tillstånd. Traditionellt har utvärdering av betongkonstruktioner bestått av stresstester på borrprover men p.g.a. den radioaktiva miljön på insidan av omslutningen är denna metod ej att föredra. NDT är självklart möjligt att använda på allsköns betongkonstruktioner då det ger både konstruktionsmässiga och estetiska fördelar. NDT metoden som rör denna studie kallas impact echo och går ut på att man med en hammare slår till en punkt på väggen och mäter responsen en bit därifrån. Lasten ger upphov till vågor i form av deformation som propagerar i väggen och dessa ger i sin tur upphov till Lamb moder. Lamb moderna är strukturella oscillationer av väggen och genom att studera dess frekvenser kan väggens tjocklek bestämmas. Elastiska egenskaper i väggen erhålls utifrån de olika vågornas propageringshastigheter. Impact echo metoden kan även användas för att finna strukturella oegentligheter inuti väggen så som sprickor och delaminering. För att utföra numeriska simuleringar av dynamiska system med NDT-metoder är finita elementmetoden (FEM) användbar. Syftet med denna studie är att bedöma vilka möjligheter som finns för att implementera absorberande ränder med ökande dämpning (ALID) i datamodeller för att minska beräkningstiden av FEM-analyser. ALID används vid kanterna för att simulera ett oändligt system, dess uppgift är att dämpa bort inkommande vågor så att dessa ej reflekteras tillbaka och stör mätningarna. Samtliga modeller i denna studie är två-dimensionella med antagen oändligt liten spänning i normalriktningen. Vinsten i beräkningstid av att använda ALID är stor och ökar ytterligare om modellen utökas till tre dimensioner. Ett ALID definieras genom dess längd och maximala massproportionerlig Rayleigh-dämpning (CMmax). I denna rapport har längderna 0.5, 1.5 and 4.5 m använts med CMmax i intervallet från 103 till 2*105 Ns/m. Dämpningen ökar med ökat avstånd in i ALID med det specificerade maxvärdet vid den bakre kanten. Det bör noteras att skillnad i dämpning mellan element leder till skillnad i impedans; reflektioner av vågorna uppstår vid övergång från ett element med lägre impedans till ett med högre impedans. Ett ALID måste således vara definierat så att det dämpar bort tillräckligt av de inkommande vågorna utan att oönskade reflektioner i ALID uppstår. Studien pekar på att ett 0.5 m långt ALID inte åstadkommer önskvärda resultat för något av valen för CMmax som använts i denna rapport. Både det 1.5 och 4.5 m långa ALID har däremot get bra resultat; ett 1.5 m långt ALID bör ha 2*104 < CMmax <5*104 Ns/m och ett 4.5 m långt ALID 5*103 < CMmax < 104 Ns/m. Förhoppningen med studien är att resultaten skall underlätta utvecklingen av NDT-metoder som kan användas vid konstruktion och underhåll av reaktoromslutningar och andra tjocka betongkonstruktioner.
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Arnold, Andreas. "Including reservoirs in ab initio transport calculations for single molecules The model of absorbing boundaries: implementation and application to the variation of the conductance with gate and bias voltage /." [S.l. : s.n.], 2007. http://digbib.ubka.uni-karlsruhe.de/volltexte/1000006955.

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Arnold, Andreas [Verfasser], and F. [Akademischer Betreuer] Evers. "Including reservoirs in ab initio transport calculations for single molecules. The model of absorbing boundaries: implementation and application to the variation of the conductance with gate and bias voltage / Andreas Arnold ; Betreuer: F. Evers." Karlsruhe : KIT-Bibliothek, 2007. http://d-nb.info/1186011297/34.

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Books on the topic "Absorbing Boundaries"

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Feltrin, Glauco. Absorbing Boundaries for the Time-Domain Analysis of Dam-Reservoir-Foundation Systems. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-7610-0.

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Feltrin, Glauco. Absorbing boundaries for the time-domain analysis of dam-reservoir-foundation systems. Zurich: Institut für Baustatik und Konstruktion ETH Zürich, 1997.

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(Editor), L. Tourrette, and Laurence Halpern (Editor), eds. Absorbing Boundaries and Layers, Domain Decomposition Methods: Applications to Large Scale Computers. Nova Science Publishers, 2001.

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L, Tourrette, and Halpern Laurence, eds. Absorbing boundaries and layers, domain decomposition methods: Applications to large scale computers. Huntington, N.Y: Nova Science Publishers, 2001.

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McDermott, Rachel Fell. A “Muslim” Poet in the Lap of a “Hindu” Mother. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198767022.003.0014.

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An intriguing twist in the devotional culture of Kālī in modern India is its spread across religious boundaries, of which a notable example is the poetry of Kazi Nazrul Islam, a twentieth-century poet who has left a dual legacy in West Bengal and Bangladesh. The absorbing attachment to Kālī of this Muslim poet who had a Tantric guru manifested itself in some of the finest lyrics that comprise the Śyāmā Saṅgīt genre. While they underscore Kālī’s command over an individual’s spirituality and poetry, they also problematize religious identities by assailing Muslim sensibilities, especially in Bangladesh, where this Hindu voice of its National Poet troubles the Bangladeshi sense of what Bangladeshi Islam is or should be. This chapter addresses the complex issue of why and how a Hindu goddess could have exercised so strong a pull on a Muslim poet possessing so powerful an imagination and so clear a voice.
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Book chapters on the topic "Absorbing Boundaries"

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Fichtner, Andreas. "Absorbing Boundaries." In Full Seismic Waveform Modelling and Inversion, 89–110. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15807-0_6.

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Halpern, Laurence. "Absorbing Boundaries and Layers." In Encyclopedia of Applied and Computational Mathematics, 10–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-540-70529-1_366.

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Bielak, Jacobo, Loukas F. Kallivokas, and Richard C. MacCamy. "Absorbing Boundaries for Acoustic Wave Propagation Problems." In Fluid Mechanics and Its Applications, 43–51. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9095-2_5.

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Ingold, John. "Nonequilibrium Motion of Electrons and Ions Near Absorbing Boundaries." In Microwave Discharges, 407–26. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1130-8_26.

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Bielak, J., R. C. MacCamy, and A. M. Trochanis. "On Time Domain Absorbing Boundaries for Wave Propagation Problems with Nonlinearities." In Computational Mechanics ’88, 87–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-61381-4_20.

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Feltrin, Glauco. "Linear time-invariant systems." In Absorbing Boundaries for the Time-Domain Analysis of Dam-Reservoir-Foundation Systems, 99–124. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-7610-0_5.

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Feltrin, Glauco. "Introduction." In Absorbing Boundaries for the Time-Domain Analysis of Dam-Reservoir-Foundation Systems, 1–12. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-7610-0_1.

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Feltrin, Glauco. "Applications." In Absorbing Boundaries for the Time-Domain Analysis of Dam-Reservoir-Foundation Systems, 227–46. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-7610-0_10.

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Feltrin, Glauco. "Closure." In Absorbing Boundaries for the Time-Domain Analysis of Dam-Reservoir-Foundation Systems, 247–50. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-7610-0_11.

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Feltrin, Glauco. "Abstract." In Absorbing Boundaries for the Time-Domain Analysis of Dam-Reservoir-Foundation Systems, 251–52. Basel: Birkhäuser Basel, 1997. http://dx.doi.org/10.1007/978-3-0348-7610-0_12.

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Conference papers on the topic "Absorbing Boundaries"

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Dai, N., E. R. Kanasewich, and A. Vafidis. "Composed absorbing boundaries for seismic modeling." In SEG Technical Program Expanded Abstracts 1993. Society of Exploration Geophysicists, 1993. http://dx.doi.org/10.1190/1.1822293.

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Charles, S., Sotiris Kapotas, and Suhas Phadke. "Absorbing boundaries with Huygens' secondary sources." In SEG Technical Program Expanded Abstracts 1994. Society of Exploration Geophysicists, 1994. http://dx.doi.org/10.1190/1.1822784.

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Mueller, Ulf, Matthias Rittweger, and Adalbert Beyer. "Influence of Absorbing Boundaries in Time Domain Iterative Methods." In 22nd European Microwave Conference, 1992. IEEE, 1992. http://dx.doi.org/10.1109/euma.1992.335835.

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Antuna-Herrera, V. "Improvement of a RTM Algorithm with Convolutional Absorbing Boundaries." In First EAGE Workshop on High Performance Computing for Upstream in Latin America. Netherlands: EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201803078.

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Eswarappa, Channabasappa, and Wolfgang J. R. Hoefer. "Absorbing boundaries for 3D-TLM modelling of microstrip patch antennas." In 23rd European Microwave Conference, 1993. IEEE, 1993. http://dx.doi.org/10.1109/euma.1993.336871.

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Ney, Michel M., and Sandrick Le Maguer. "Absorbing layers for the simulation of open boundaries in TLM field computation." In 1998 Symposium on Antenna Technology and Applied Electromagnetics. IEEE, 1998. http://dx.doi.org/10.1109/antem.1998.7861746.

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Drozdz, M. "Efficient Numerical Modelling of Absorbing Regions for Boundaries Of Guided Waves Problems." In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2006. http://dx.doi.org/10.1063/1.2184520.

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TenPas, Peter, Stephen Schwalm, and Ramesh Agarwal. "Development of a high-order compact algorithm for aeroacoustics employing PML absorbing boundaries." In 4th AIAA/CEAS Aeroacoustics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-2221.

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Wellens, Peter R., Roel Luppes, Arthur E. P. Veldman, and Mart J. A. Borsboom. "CFD Simulations of a Semi-Submersible With Absorbing Boundary Conditions." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79342.

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The CFD tool ComFLOW is suitable for simulations of two-phase flows in offshore applications. ComFLOW solves the Navier-Stokes equations in both water and (compressible) air. The water surface is advected through a Volume-of-Fluid method, with a height-function approach for improved accuracy. By employing Absorbing Boundary Conditions (ABC), boundaries can be located relatively close to an object, without influencing outgoing waves or generating numerical reflections that affect the waves inside the flow domain. Traditionally, boundaries are located far from the obstacle to avoid reflections; even when numerical damping zones are used. Hence, with the ABC approach less grid points are required for the same accuracy, which reduces the computing time considerably. Simulations of a semi-submersible model are compared to measurements. The overall agreement is reasonably good, for a wide range of wave conditions. The ABC performs well; numerical reflections are almost absent. Moreover, computing times reduce with a factor four compared to damping zone techniques.
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Dai, N., A. Vafidis, and R. Kanasewich. "Seismic migration and absorbing boundaries with a one-way wave system in heterogeneous media." In 55th EAEG Meeting. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609.201411668.

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