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Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Rayleigh analysis"

1

Hubral, P., and M. Tygel. "Analysis of the Rayleigh pulse." GEOPHYSICS 54, no. 5 (May 1989): 654–58. http://dx.doi.org/10.1190/1.1442692.

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Seismologists make frequent use of wavelets (also referred to as signals, signatures, or pulses), particularly in such fields as seismic filtering, wavelet processing, wave‐propagation modeling, and trace inversion. Whenever possible, the actual seismic wavelet of the real source should be considered (Hosken, 1988). However, frequently, particularly in wave‐propagation modeling, one must consider a synthetic source wavelet. This should, if possible, be given by a simple mathematical formula and possess an easy description for its most important spectral properties (e.g., amplitude and phase spectrum, main frequency, Hilbert transform, etc.). Moreover, the mathematical expression should be such that with a minimum number of parameters a large flexibility in the form of the wavelet can be obtained.
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2

Cardoso, Fernando, Partially supported by CNP, q. sub, esub Brazil, Fernando Cardoso, Partially supported by CNP, q. sub, and esub Brazil. "Rayleigh Quasimodes In Linear Elasticity." Communications in Partial Differential Equations 17, no. 7 (1992): 87–100. http://dx.doi.org/10.1080/03605309208820888.

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3

Gupta, J. R., and M. B. Kaushal. "Generalized hydromagnetic Rayleigh-Taylor instability." Journal of Mathematical Analysis and Applications 134, no. 1 (August 1988): 51–63. http://dx.doi.org/10.1016/0022-247x(88)90006-6.

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4

Qingling, Du, Liu Zhengping, and Liu Shijie. "Analysis of Influencing Factors and Numerical Simulation of Horizontal-to-Vertical Spectral Ratio Method." Journal of Earthquake and Tsunami 14, no. 01 (September 18, 2019): 2050004. http://dx.doi.org/10.1142/s1793431120500049.

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To improve the calculation accuracy of the horizontal-to-vertical spectral ratio (HVSR) method, this study theoretically analyzed the influencing factors of Rayleigh wave polarizability. The phase difference of the horizontal component and the phase difference of the vertical component are found to play a key role in calculating the polarizability. The influence mechanism of the superposition of body waves and different Rayleigh waves on the polarizability of the Rayleigh wave is derived. The effects of the body wave, amplitude, frequency and Rayleigh wave superposition of different sources on the polarizability are verified by numerical simulation. The results show that the body wave significantly interferes with the polarizability of the Rayleigh wave. When a signal contains more than one set of Rayleigh waves, the superposition of the same-source Rayleigh waves does not affect the ratio. However, the superposition of Rayleigh waves from different sources significantly interferes with the calculation of the polarizability. This provides a technical method and a theoretical basis for accurately extracting the Rayleigh wave polarizability dispersion curve from a seismic record signal. This would help improve the detection accuracy of the HVSR method for ground pulse signals.
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5

Bosner, Nela, and Zlatko Drmač. "Subspace Gap Residuals for Rayleigh–Ritz Approximations." SIAM Journal on Matrix Analysis and Applications 31, no. 1 (January 2009): 54–67. http://dx.doi.org/10.1137/070689425.

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6

Tang, Ping Tak Peter. "Dynamic Condition Estimation and Rayleigh–Ritz Approximation." SIAM Journal on Matrix Analysis and Applications 15, no. 1 (January 1994): 331–46. http://dx.doi.org/10.1137/s0895479892226603.

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7

Batterson, Steve, and John Smillie. "The Dynamics of Rayleigh Quotient Iteration." SIAM Journal on Numerical Analysis 26, no. 3 (June 1989): 624–36. http://dx.doi.org/10.1137/0726037.

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8

Kaminski, Allison, and James McDaniel. "Analysis of modified structures by Rayleigh quotient." Journal of the Acoustical Society of America 150, no. 4 (October 2021): A344. http://dx.doi.org/10.1121/10.0008528.

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In structural vibrations, the Rayleigh quotient may be used to calculate the natural frequency (or eigenvalue) of a structure given the corresponding mode shape (or eigenvector). Previous works have shown that the eigenvalue may be calculated relatively accurately using the Rayleigh quotient as long as an appropriate guess is made for the eigenvector. Typically, the Rayleigh quotient is used to predict the eigenvalues when the structure does not change. However, in this work the structure will be modified and the change in the eigenvalue will be predicted using the Rayleigh quotient. In order to use the Rayleigh quotient a guess for the eigenvector must be made. Here, the displacement vector of the nominal structure forced near a resonance will be used as the guess. Analysis and computations will be done for an undamped beam that is harmonically forced. To modify the structure, the stiffness elements will be scaled. Using this approach, it will be demonstrated that changes in the natural frequencies can be predicted relatively quickly for a modified structure. In addition, this method provides insight into which elements should be scaled to get the greatest frequency change. [Work supported by ONR under Grant N00014-19-1-2100.]
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9

Jimenez, Javier, and Juan A. Zufiria. "A boundary-layer analysis of Rayleigh-Bénard convection at large Rayleigh number." Journal of Fluid Mechanics 178 (May 1987): 53–71. http://dx.doi.org/10.1017/s0022112087001113.

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A boundary-layer analysis is presented for the two-dimensional nonlinear convection of an infinite-Prandtl-number fluid in a rectangular enclosure, in the limit of large Rayleigh numbers. Particular emphasis is given to the analysis of the periodic boundary layers, and on the removal of the singularities that appear near the corners of the cell. It is argued that this later step is necessary to ensure the correctness of the boundary-layer assumptions. Numerical values are obtained for the heat transfer and stress characteristics of the flow.
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10

FASANA, A., and S. MARCHESIELLO. "RAYLEIGH-RITZ ANALYSIS OF SANDWICH BEAMS." Journal of Sound and Vibration 241, no. 4 (April 2001): 643–52. http://dx.doi.org/10.1006/jsvi.2000.3311.

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Дисертації з теми "Rayleigh analysis"

1

Swisher, Nora. "Data Analysis of Rayleigh-Taylor Unstable Flows." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/988.

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Rayleigh-Taylor and Richtmyer-Meshkov instabilities (RTI and RMI) occur when afluid interface between fluids of different densities is accelerated against the density gradient. RTI/RMI plays an important role in the dynamics of fluids and plasmas on microscopic scales, such as inertial confinement fusion, through astronomical scales, such as supernova explosions. These problems have been studied for decades, yet it remains a challenge to observe, model, and describe RTI/RMI mathematically. Without the tools used to analyze stable equilibrium, we must find more robust analyses. This work uses robust data analysis techniques to systematically study RT unstable flows. We report a thorough analysis of experimental data in supernova experiments conducted at high powered laser facilities, evaluating what information experiments and simulations may tell us about the fundamentals of RTI and RT mixing in high energy density plasmas by comparing the data with rigorous theoretical approaches. We investigate the statistically unsteadiness of RT mixing by numerically modeling the set of stochastic nonlinear differential equations which govern the rate of change of momentum in a packet of fluid undergoing RT instability. By analyzing the modeled solutions, we measure the influence of fluctuations on measurable quantities, find new characteristic values which may be used as to diagnose the regime of an experiment or simulation, and measure the spectra of fluctuations as they propagate throughout the system. We study the effect of the initial perturbation amplitude on the RMI interfacial dynamics using Single Particle Hydrodynamics simulations. The compound motion of the interface and bulk fluid ow is measured, an empirical model is found to describe data, and we find an upper bound for the amount of energy deposited to the interface. There exists a plethora of data that may still be analyzed systematically, as exemplified in this thesis. Future work may improve the fits of experimental data by exploring well designed parameter spaces, model additional stochastic effects, and measure small scale features of ow quantities in simulations.
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2

Rao, Chaitanya Kumar Hassibi Babak Hassibi Babak. "Asymptotic analysis of wireless systems with Rayleigh fading /." Diss., Pasadena, Calif. : Caltech, 2007. http://resolver.caltech.edu/CaltechETD:etd-04252007-122857.

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3

Bashir, Hussam. "Calculation of Wave Propagation for Statistical Energy Analysis Models." Thesis, Uppsala universitet, Tillämpad mekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-267928.

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This thesis investigates the problems of applying Statistical Energy Analysis (SEA) tomodels that include solid volumes. Three wave types (Rayleigh waves, Pressure wavesand Shear waves) are important to SEA and the mathematics behind them is explainedhere. The transmission coefficients between the wave types are needed for energytransfer in SEA analysis and different approaches to solving the properties of wavepropagation on a solid volume are discussed. For one of the propagation problems, asolution, found in Momoi [6] is discussed, while the other problem remains unsolveddue to the analytical difficulties involved.
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4

Mckay, Mark. "Finite element analysis of isotropic and anisotropic loaded ridge waveguide." Thesis, Heriot-Watt University, 1998. http://hdl.handle.net/10399/618.

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5

Fan, Yichao. "The analysis of surface defects using the ultrasonic Rayleigh surface wave." Thesis, University of Warwick, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495017.

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Surface defects, such as rolling contact fatigue (RCF) cracking, can be a difficult class of surface defects for existing on-line non-destructive testing techniques to detect and size accurately at high speed. Gauge corner cracking on the running surface of the railway track is a type of RCF defect. There are economic and safety benefits to have an accurate, fast and reliable NDT technique to detect such defects. The EMAT pitch-catch ultrasonic testing technique, using the Rayleigh surface wave developed at the laser ultrasound group, has been shown to be able to detect and size surface defects. The pitch-catch geometry also allows this technique to be used at high speed, for on-line NDT applications.
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Yildirim, Cihan. "Numerical Study Of Rayleigh Benard Thermal Convection Via Solenoidal Bases." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613128/index.pdf.

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Numerical study of transition in the Rayleigh-B'
enard problem of thermal convection between rigid plates heated from below under the influence of gravity with and without rotation is presented. The first numerical approach uses spectral element method with Fourier expansion for horizontal extent and Legendre polynomal for vertical extent for the purpose of generating a database for the subsequent analysis by using Karhunen-Lo'
eve (KL) decomposition. KL decompositions is a statistical tool to decompose the dynamics underlying a database representing a physical phenomena to its basic components in the form of an orthogonal KL basis. The KL basis satisfies all the spatial constraints such as the boundary conditions and the solenoidal (divergence-free) character of the underlying flow field as much as carried by the flow database. The optimally representative character of the orthogonal basis is used to investigate the convective flow for different parameters, such as Rayleigh and Prandtl numbers. The second numerical approach uses divergence free basis functions that by construction satisfy the continuity equation and the boundary conditions in an expansion of the velocity flow field. The expansion bases for the thermal field are constructed to satisfy the boundary conditions. Both bases are based on the Legendre polynomials in the vertical direction in order to simplify the Galerkin projection procedure, while Fourier representation is used in the horizontal directions due to the horizontal extent of the computational domain taken as periodic. Dual bases are employed to reduce the governing Boussinesq equations to a dynamical system for the time dependent expansion coefficients. The dual bases are selected so that the pressure term is eliminated in the projection procedure. The resulting dynamical system is used to study the transitional regimes numerically. The main difference between the two approaches is the accuracy with which the solenoidal character of the flow is satisfied. The first approach needs a numerically or experimentally generated database for the generation of the divergence-free KL basis. The degree of the accuracy for the KL basis in satisfying the solenoidal character of the flow is limited to that of the database and in turn to the numerical technique used. This is a major challenge in most numerical simulation techniques for incompressible flow in literature. It is also dependent on the parameter values at which the underlying flow field is generated. However the second approach is parameter independent and it is based on analytically solenoidal basis that produces an almost exactly divergence-free flow field. This level of accuracy is especially important for the transition studies that explores the regions sensitive to parameter and flow perturbations.
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7

Orozco, M. Catalina (Maria Catalina). "Inversion Method for Spectral Analysis of Surface Waves (SASW)." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5124.

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This research focuses on estimating the shear wave velocity (Vs) profile based on the dispersion curve obtained from SASW field test data (i.e., inversion of SASW data). It is common for the person performing the inversion to assume the prior information required to constrain the problem based on his/her own judgment. Additionally, the Vs profile is usually shown as unique without giving a range of possible solutions. For these reasons, this work focuses on: (i) studying the non-uniqueness of the solution to the inverse problem; (ii) implementing an inversion procedure that presents the estimated model parameters in a way that reflects their uncertainties; and (iii) evaluating tools that help choose the appropriate prior information. One global and one local search procedures were chosen to accomplish these purposes: a pure Monte Carlo method and the maximum likelihood method, respectively. The pure Monte Carlo method was chosen to study the non-uniqueness by looking at the range of acceptable solutions (i.e., Vs profiles) obtained with as few constraints as possible. The maximum likelihood method was chosen because it is a statistical approach, which enables us to estimate the uncertainties of the resulting model parameters and to apply tools such as the Bayesian criterion to help select the prior information objectively. The above inversion methods were implemented for synthetic data, which was produced with the same forward algorithm used during inversion. This implies that all uncertainties were caused by the nature of the SASW inversion problem (i.e., there were no uncertainties added by experimental errors in data collection, analysis of the data to create the dispersion curve, layered model to represent a real 3-D soil stratification, or wave propagation theory). At the end of the research, the maximum likelihood method of inversion and the tools for the selection of prior information were successfully used with real experimental data obtained in Memphis, Tennessee.
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Thiele, Sebastian. "Air-coupled detection of Rayleigh surface waves to assess material nonlinearity due to precipitation in alloy steel." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50276.

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Nonlinear ultrasonic waves have demonstrated high sensitivities to various microstructural changes in metal including coherent precipitates; these precipitates introduce a strain field in the lattice structure. The thermal aging of certain alloy steels leads to the formation of coherent precipitates, which pin dislocations and contribute to the generation of a higher harmonics in an initially monochromatic wave. The objective of this research is to develop a robust technique to perform nonlinear Rayleigh wave measurements in metals using a non-contact receiving transducer. In addition a discussion about the data processing based on the two-dimensional diffraction and attenuation model is provided in order to calculate the relative nonlinearity parameter. A precipitate hardenable material, 17-4 PH stainless steel, is used to obtain different precipitation stages by thermal treatment and the influence of precipitates on the ultrasonic nonlinearity is assessed. Conclusions about the microstrucutural changes in the material are drawn based on the nonlinear Rayleigh surface wave measurement and complementary measurements of thermo-electric power, mircohardness and ultrasonic velocity. The results show that the nonlinearity parameter is sensitive to coherent precipitates in the material and moreover that precipitation characteristics can be characterized based on the obtained experimental data.
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9

Seet, Siong Leng Henry. "Analysis of noncoherent orthogonal modulation for mobile computing." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/55206.

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Approved for public release; distribution is unlimited.
Wireless communication is employed to connect mobile computers in a networked environment for information exchange. In a tactical space, sensors and computers typically need to operate on-the-move while transmitting data over both short and long distances in different terrain and conditions. The wireless communication is thus susceptible to effects of Doppler shift and channel fading. In addition, when security and anti jamming features are required, such as frequency-hopping techniques, then coherent signal detection is difficult and noncoherent modulation is used instead. Our study will focus on the bit error rate (BER) performance analysis of noncoherent orthogonal modulation, specifically M-ary frequency-shift keying (MFSK) and code-shift keying (CSK) modulation, in both additive white Gaussian noise (AWGN) and for a Rayleigh fading channel with Doppler shift. The potential applications include communications between mobile computer-sensor devices, such as a mobile ground control station maintaining a datalink with UAV.
Civilian
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10

Shao, Xiaofei. "A receiver structure for frequency-flat time-varying rayleigh channels and performance analysis." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121487.

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This thesis proposes a receiver structure for frequency-flat time-varying Rayleigh channels, consisting of two parts: a receiver front-end and Maximum A-Posteriori (MAP) detector. Discretization of the received continuous time signal is an essential stage in the front-end, and for such application this thesis presents a new framework for discrete representation of continuous time signals. A key point of this framework is the representation of the fading autocorrelation function in the form of a finite dimensional separable kernel. The Fast Haar Transform (FHT) algorithm is used in the front-end to reduce complexity. Analysis of our receiver structure for slow-fading channels shows that it is optimal for certain modulation schemes. Computed and Monte-Carlo simulated performance results are presented for three binary modulation schemes over time-varying Rayleigh fading channels. By comparison with literature, it is shown that our receiver can achieve optimal performance for Time-Orthogonal modulation. For Minimum Shift Keying (MSK) modulation, our receiver using four basis functions can lower the error floor by more than one order of magnitude with respect to reported techniques of comparable complexity. Orthogonal Frequency Shift Keying (FSK) modulation can achieve the same performance as Time-Orthogonal for the slow-fading case but performs worse over fast-fading channels, and suffers from an error floor. However, compared to MSK, Orthogonal FSK has a better performance.
Dans la présente thèse, nous proposons une structure de récepteur pour des canaux de Rayleigh à variation temporelle et à réponse uniforme en fréquences, comprenant deux parties : un étage d'entrée du récepteur et un détecteur a posteriori maximum (MAP, pour Maximum A-Posteriori). La discrétisation du signal reçu et continu dans le temps représente une étape essentielle de l'étage d'entrée et pour une telle application, nous présentons un nouveau cadre pour la représentation discrète des signaux continus dans le temps. L'un des aspects clés de ce cadre est la représentation de la fonction d'autocorrélation de l'évanouissement sous la forme d'un noyau séparable dimensionnel fini. On utilise l'algorithme de la transformée de Haar rapide (FHT, pour Fast Haar Transform) à l'étage d'entrée dans le but d'atténuer la complexité. Une analyse de notre structure de récepteur pour canaux à évanouissement graduel révèle que cette structure convient de façon optimale à certains schémas de modulation. Les résultats de rendement, simulés par ordinateur et à l'aide de la méthode de Monte-Carlo, sont présentés pour trois schémas de modulation binaire appliqués à des canaux à évanouissement de Rayleigh à variation temporelle. Une comparaison avec la littérature scientifique démontre que notre récepteur peut offrir un rendement optimum dans le cas de la modulation orthogonale temporelle. En ce qui concerne la modulation à déplacement minimum (MSK, pour Minimum Shift Keying), notre récepteur, qui fait appel à quatre fonctions de base, est en mesure d'abaisser le plancher d'erreur d'un ordre de grandeur pour ce qui est des techniques signalées présentant une complexité similaire. La modulation par déplacement de fréquence orthogonale (FSK, pour Frequency Shift Keying) peut offrir le même rendement que la modulation orthogonale temporelle dans le casdes canaux à évanouissement graduel, mais son rendement est médiocre avec des canaux à évanouissement rapide, en plus de subir les répercussions d'un plancher d'erreur. Par contre, comparativement à la modulation à déplacement minimum, la modulation par déplacement de fréquence orthogonale procure un rendement supérieur.
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Книги з теми "Rayleigh analysis"

1

Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. The Rayleigh-Ritz Method for Structural Analysis. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.

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2

Eidson, T. M. Filtering analysis of a direct numerical simulation of the turbulent Rayleigh-Benard problem. Hampton, Va: Institute for Computer Applications in Science and Engineering, 1990.

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3

Shore, Charles P. Reduction method for thermal analysis of complex aerospace structures. Washington, D.C: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1985.

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4

Shirinzadeh, B. Study of cluster formation and its effects on Rayleigh and Raman scattering measurements in a Mach 6 wind tunnel. Washington, D. C: American Institute of Aeronautics and Astronautics, 1991.

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5

Dan bai nong du guang dian ce shi ji shu. Beijing: Beijing li gong da xue chu ban she, 2014.

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6

Conka, Tahir. Performance analysis of noncoherent differential phase shift keying using Post-Detection Selection Combining over a Rayleigh fading channel. Monterey, Calif: Naval Postgraduate School, 1998.

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7

Graglia, Roberto D., Giuseppe Pelosi, and Stefano Selleri, eds. International Workshop on Finite Elements for Microwave Engineering. Florence: Firenze University Press, 2016. http://dx.doi.org/10.36253/978-88-6655-968-9.

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When Courant prepared the text of his 1942 address to the American Mathematical Society for publication, he added a two-page Appendix to illustrate how the variational methods first described by Lord Rayleigh could be put to wider use in potential theory. Choosing piecewise-linear approximants on a set of triangles which he called elements, he dashed off a couple of two-dimensional examples and the finite element method was born. … Finite element activity in electrical engineering began in earnest about 1968-1969. A paper on waveguide analysis was published in Alta Frequenza in early 1969, giving the details of a finite element formulation of the classical hollow waveguide problem. It was followed by a rapid succession of papers on magnetic fields in saturable materials, dielectric loaded waveguides, and other well-known boundary value problems of electromagnetics. … In the decade of the eighties, finite element methods spread quickly. In several technical areas, they assumed a dominant role in field problems. P.P. Silvester, San Miniato (PI), Italy, 1992 Early in the nineties the International Workshop on Finite Elements for Microwave Engineering started. This volume contains the history of the Workshop and the Proceedings of the 13th edition, Florence (Italy), 2016 . The 14th Workshop will be in Cartagena (Colombia), 2018.
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8

Pattern formation in viscous flows: The Taylor-Couette problem and Rayleigh-Benard convection. Basel: Birkhäuser, 1999.

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9

Pattern formation in viscous flows: The Taylor-Couette problem and Rayleigh-Bénard convection. Basel: Birkhäuser, 1999.

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10

Mochida, Yusuke, Luis Monterrubio, and Sinniah Ilanko. Rayleigh-Ritz Method for Structural Analysis. Wiley & Sons, Incorporated, John, 2014.

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Частини книг з теми "Rayleigh analysis"

1

Kaptsov, A. V., and S. V. Kuznetsov. "Eigensolutions for Rayleigh Wave Analysis." In IUTAM Symposium on Diffraction and Scattering in Fluid Mechanics and Elasticity, 329–36. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-0087-0_36.

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2

Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "The Rayleigh-Ritz Method and Simple Applications." In The Rayleigh-Ritz Method for Structural Analysis, 21–31. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch3.

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3

Ching, Emily S. C. "Statistical Analysis of Turbulent Fluctuations." In Statistics and Scaling in Turbulent Rayleigh-Bénard Convection, 9–35. Singapore: Springer Singapore, 2013. http://dx.doi.org/10.1007/978-981-4560-23-8_2.

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4

Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "Principle of Conservation of Energy and Rayleigh's Principle." In The Rayleigh-Ritz Method for Structural Analysis, 1–9. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch1.

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5

Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "Natural Frequencies and Modes of Plates of Rectangular Planform." In The Rayleigh-Ritz Method for Structural Analysis, 113–31. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch10.

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Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "Natural Frequencies and Modes of Shallow Shells of Rectangular Planform." In The Rayleigh-Ritz Method for Structural Analysis, 133–48. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch11.

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Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "Natural Frequencies and Modes of Three-Dimensional Bodies." In The Rayleigh-Ritz Method for Structural Analysis, 149–59. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch12.

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Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "Vibration of Axially Loaded Beams and Geometric Stiffness." In The Rayleigh-Ritz Method for Structural Analysis, 161–79. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch13.

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Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "The RRM in Finite Elements Method." In The Rayleigh-Ritz Method for Structural Analysis, 181–96. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch14.

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Ilanko, Sinniah, Luis E. Monterrubio, and Yusuke Mochida. "Rayleigh's Principle and Its Implications." In The Rayleigh-Ritz Method for Structural Analysis, 11–19. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118984444.ch2.

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Тези доповідей конференцій з теми "Rayleigh analysis"

1

Jiang, Naibo, Paul S. Hsu, Daniel Loriorla, Paul M. Danehy, and Sukesh Roy. "10-kHz rate tomographic Rayleigh scattering imaging." In Laser Applications to Chemical, Security and Environmental Analysis. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/lacsea.2020.ltu4c.3.

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2

Pugsley, Deborah Nassif, and Lutz Hüwel. "Rayleigh and Raman Diagnostic of Laser Generated Plasmas." In Laser Applications to Chemical and Environmental Analysis. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/lacea.1996.lwd.13.

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Laser-produced plasmas have long attracted the attention of researchers because of their unusual properties coupled with ease of generation. With laser power densities above approximately 1013 W/cm2 high electron densities and temperatures can be achieved and here x-ray lasers and laser fusion are important applications. At lower intensities, among other applications plasma etching and spectrochemical analysis make use of laser plasmas. We have found1 that for laser power densities of about 1010 W/cm2 the temperatures in the aftermath of Q-switched laser sparks in air (or other gases) can be several thousand degree Kelvin, even at times as late as 100 μs after ignition. Obviously, the plasma must eventually decay and approach ambient temperature. At least in principle, this opens the possibility to access conditions relevant for combustion and other high temperature chemical processes-even if only on a small spatial scale and during short time intervals. To study the feasibility of such high rep rate generation of temperatures in the range from say 300 to 3000 K we have investigated the spatial and temporal structure of Nd:YAG laser generated sparks in air and other gases during their final stages of decay, i.e. when their temperature and pressure approaches that of the surrounding gas.
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3

Baranec, Christoph J., Michael Lloyd-Hart, N. Mark Milton, Thomas Stalcup, Miguel Snyder, Nicole Putnam, and Roger Angel. "Ground layer wavefront reconstruction using dynamically refocused Rayleigh laser beacons." In Adaptive Optics: Methods, Analysis and Applications. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/aopt.2005.atha3.

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4

Střelec, Luboš, and Milan Stehlík. "On simulation of exact tests in Rayleigh and normal families." In NUMERICAL ANALYSIS AND APPLIED MATHEMATICS ICNAAM 2012: International Conference of Numerical Analysis and Applied Mathematics. AIP, 2012. http://dx.doi.org/10.1063/1.4756162.

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5

Lainscsek, Claudia S. M., and Ferdinand Schürrer. "Spatio-temporal analysis of Rayleigh-Bénard convection." In Chaotic, fractal, and nonlinear signal processing. AIP, 1996. http://dx.doi.org/10.1063/1.51049.

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6

Peng, Shia-Hui, Lars Davidson, and Kemo Hanjalic. "NUMERICAL ANALYSIS OF RAYLEIGH-BERNARD CONVECTION USING LARGE EDDY SIMULATION AT HIGH RAYLEIGH NUMBERS." In Fourth International Symposium on Turbulence and Shear Flow Phenomena. Connecticut: Begellhouse, 2005. http://dx.doi.org/10.1615/tsfp4.1630.

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T, Vishnu V., and Arnab Kumar De. "ANALYSIS OF PERIODIC RAYLEIGH BÉNARD CONVECTION WITH MODERATE ROTATION RATES AT LOW RAYLEIGH NUMBERS." In Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017). Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihmtc-2017.110.

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Charney, Finley A. "Unintended Consequences of Modeling Damping in Structures: Rayleigh Damping." In 17th Analysis and Computation Specialty Conferenc at Structures 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40878(202)12.

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Kurek, Igor, Pierre Lecomte, Thomas Castelain, Emmanuel Jondeau, and Christophe Bailly. "Interferometric Rayleigh Scattering for flow analysis : Fabry-Pérot interferogram analysis." In 28th AIAA/CEAS Aeroacoustics 2022 Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2022. http://dx.doi.org/10.2514/6.2022-2957.

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10

Andreozzi, Assunta, Bernardo Buonomo, and Oronzio Manca. "Parametric Analysis for Thermal and Fluid Dynamic Management of Natural Convection in a Channel-Chimney System." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95585.

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In this paper a parametric analysis of natural convection in air in a channel-chimney system symmetrically heated at uniform heat flux, obtained by means of a numerical simulation, is carried out. The analysed regime is two-dimensional, laminar and steady-state. The numerical procedure employs the full Navier-Stokes and energy equations in terms of the stream function-vorticity approach. Results are presented in terms of wall temperature profiles in order to show the more thermally convenient configurations which correspond to the channel-chimney system with the lowest maximum wall temperature. The analysis is obtained for a Rayleigh number in the range between 102 and 105, for a channel aspect ratio equal to 5, 10 and 20 and the extension and expansion ratios between 1.0 and 4.0. Correlations for dimensionless mass flow rate, maximum wall temperature and average Nusselt number in terms of Rayleigh number, aspect ratio, extension and expansion ratios are presented. Geometric optimal configurations, for assigned Rayleigh number and aspect ratio, are estimated as a function of the extension ratio. For considered Rayleigh number the difference between the highest and the lowest maximum wall temperatures increases increasing the channel aspect ratio. This behaviour is as greater as the extension ratio is. These differences decrease significantly for the highest Rayleigh number value. The optimal expansion ratio values depend strongly on Rayleigh number and extension ratio values and slightly on the aspect ratio.
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Звіти організацій з теми "Rayleigh analysis"

1

Meiron, D. I., and P. G. Saffman. Analytical and numerical analysis of finite amplitude Rayleigh-Taylor instability. Office of Scientific and Technical Information (OSTI), September 1987. http://dx.doi.org/10.2172/5585523.

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Kamath, C., A. Gezahegne, and P. Miller. Analysis of Rayleigh-Taylor Instability Part I: Bubble and Spike Count. Office of Scientific and Technical Information (OSTI), August 2006. http://dx.doi.org/10.2172/900052.

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Kamath, C., A. Gezahegne, and P. Miller. Analysis of Rayleigh-Taylor Instability: Statistics on Rising Bubbles and Falling Spikes. Office of Scientific and Technical Information (OSTI), October 2007. http://dx.doi.org/10.2172/923126.

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Kamath, C., A. Gezahegne, and P. Miller. Analysis of Rayleigh-Taylor Instability: Statistics on Rising Bubbles and Falling Spikes. Office of Scientific and Technical Information (OSTI), December 2007. http://dx.doi.org/10.2172/924000.

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5

Herbert, John M. Symbolic derivation of high-order Rayleigh-Schroedinger perturbation energies using computer algebra: Application to vibrational-rotational analysis of diatomic molecules. Office of Scientific and Technical Information (OSTI), January 1997. http://dx.doi.org/10.2172/491448.

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6

Hussey, T. W., and S. S. Payne. Analytic theory of the Rayleigh-Taylor instability in a uniform density plasma-filled ion diode. Office of Scientific and Technical Information (OSTI), April 1987. http://dx.doi.org/10.2172/6488379.

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