Log in

Relevant bibliographies by topics / Transmission and reflection coefficients / Journal articles

Journal articles on the topic 'Transmission and reflection coefficients'

To see the other types of publications on this topic, follow the link: Transmission and reflection coefficients.

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Transmission and reflection coefficients.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Yang, Chun, Yun Wang, and Yanghua Wang. "Reflection and transmission coefficients of a thin bed." GEOPHYSICS 81, no. 5 (September 2016): N31—N39. http://dx.doi.org/10.1190/geo2015-0360.1.

Full text

Abstract:

The study of thin-bed seismic response is an important part in lithologic and methane reservoir modeling, critical for predicting their physical attributes and/or elastic parameters. The complex propagator matrix for the exact reflections and transmissions of thin beds limits their application in thin-bed inversion. Therefore, approximation formulas with a high accuracy and a relatively simple form are needed for thin-bed seismic analysis and inversion. We have derived thin-bed reflection and transmission coefficients, defined in terms of displacements, and approximated them to be in a quasi-Zoeppritz matrix form under the assumption that the middle layer has a very thin thickness. We have verified the approximation accuracy through numerical calculation and concluded that the errors in PP-wave reflection coefficients [Formula: see text] are generally smaller than 10% when the thin-bed thicknesses are smaller than one-eighth of the PP-wavelength. The PS-wave reflection coefficients [Formula: see text] have lower approximation accuracy than [Formula: see text] for the same ratios of thicknesses to their respective wavelengths, and the [Formula: see text] approximation is not acceptable for incident angles approaching the critical angles (when they exist) except in the case of extremely strong impedance difference. Errors in phase for the [Formula: see text] and [Formula: see text] approximation are less than 10% for the cases of thicknesses less than one-tenth of the wavelengths. As expected, a thinner middle layer and a weaker impedance difference would result in higher approximation accuracy.

APA, Harvard, Vancouver, ISO, and other styles

2

Nardone, P., J. Fortuny, and A. Sieber. "Initial conditions, reflection and transmission coefficients revisited." Journal of Electromagnetic Waves and Applications 10, no. 11 (January 1996): 1527–41. http://dx.doi.org/10.1163/156939396x00900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Simon, María C., and Liliana I. Perez. "Reflection and Transmission Coefficients in Uniaxial Crystals." Journal of Modern Optics 38, no. 3 (March 1991): 503–18. http://dx.doi.org/10.1080/09500349114552751.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Imhof, Matthias G. "Scale dependence of reflection and transmission coefficients." GEOPHYSICS 68, no. 1 (January 2003): 322–36. http://dx.doi.org/10.1190/1.1543218.

Full text

Abstract:

Well logs show that heterogeneities occur at many different depth scales. This study examines the effects of these heterogeneities on the propagation of seismic waves, and specifically the dependence of reflection and transmission on the spatial scale content of the medium. Wavelet transformations are used to filter certain spatial scales from an acoustic sonic log. The scale‐filtered logs are used to construct layerstack models for which reflection and transmission seismograms are computed. The modified logs are also used to calculate frequency dependent reflection and transmission coefficients as functions of scale content. It is observed that features shorter than one‐fourth of the dominant wavelength have little effect on the reflection and transmission of seismic waves. Features larger than the dominant wavelength affect arrival times of individual packets within the wavetrain, but often these features hardly alter the overall appearance of individual wave packets. Reflection and transmission coda are primarily governed by heterogeneity at spatial scales similar to half the propagating wavelength. These scales appear to control the presence and shape of the events within the coda. The study also shows that the arrival times of packets at 1 kHz approach the theoretically expected value obtained from the harmonic velocity average, and the arrival times of packets below 1 Hz approach the theoretical value expected for the Backus average of the velocities.

APA, Harvard, Vancouver, ISO, and other styles

5

Robinson, Enders A. "Seismic time‐invariant convolutional model." GEOPHYSICS 50, no. 12 (December 1985): 2742–51. http://dx.doi.org/10.1190/1.1441894.

Full text

Abstract:

A layered‐earth seismic model is subdivided into two subsystems. The upper subsystem can have any sequence of reflection coefficients but the lower subsystem has a sequence of reflection coefficients which are small in magnitude and have the characteristics of random white noise. It is shown that if an arbitrary wavelet is the input to the lower lithologic section, the same wavelet convolved with the white sequence of reflection coefficients will be the reflected output. That is, a white sedimentary system passes a wavelet in reflection as a linear time‐invariant filter with impulse response given by the reflection coefficients. Thus, the small white lithologic section acts as an ideal reflecting window, producing perfect primary reflections with no multiple reflections and no transmission losses. The upper subsystem produces a minimum‐delay multiple‐reflection waveform. The seismic wavelet is the convolution of the source wavelet, the absorption effect, this multiple‐reflection waveform, and the instrument effect. Therefore, the seismic trace within the time gate corresponding to the lower subsystem is given by the convolution of the seismic wavelet with the white reflection coefficients of the lower subsystem. The linear time‐invariant seismic model used in predictive deconvolution has been derived. Furthermore, it is shown that any layered subsystem which has small reflection coefficients acts as a linear time‐invariant filter. This explains why time‐invariant deconvolution filters can be used within various time gates on a seismic trace which at first appearance might look like a continually time‐varying phenomenon.

APA, Harvard, Vancouver, ISO, and other styles

6

Norris, Andrew N. "Integral identities for reflection, transmission, and scattering coefficients." Journal of the Acoustical Society of America 144, no. 4 (October 2018): 2109–15. http://dx.doi.org/10.1121/1.5058681.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Khaliullin, D. Y., and S. A. Tretyakov. "Reflection and transmission coefficients for thin bianisotropic layers." IEE Proceedings - Microwaves, Antennas and Propagation 145, no. 2 (1998): 163. http://dx.doi.org/10.1049/ip-map:19981452.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Nechtschein, S., and F. Hron. "Effects of anelasticity on reflection and transmission coefficients." Geophysical Prospecting 45, no. 5 (September 1997): 775–93. http://dx.doi.org/10.1046/j.1365-2478.1997.590288.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Yang, Chun, and Yun Wang. "Reflection and transmission coefficients of poroelastic thin-beds." Journal of Geophysics and Engineering 15, no. 5 (June 29, 2018): 2209–20. http://dx.doi.org/10.1088/1742-2140/aac359.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sabah, Cumali, and Savas Uckun. "Reflection and transmission coefficients of multiple chiral layers." Science in China Series E: Technological Sciences 49, no. 4 (August 2006): 457–67. http://dx.doi.org/10.1007/s11431-006-2010-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Nitsch, Jurgen B., Ronald Rambousky, and Sergey Tkachenko. "Introduction of Reflection and Transmission Coefficients for Nonuniform Radiating Transmission Lines." IEEE Transactions on Electromagnetic Compatibility 57, no. 6 (December 2015): 1705–13. http://dx.doi.org/10.1109/temc.2015.2456098.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Panahi, M., G. Solookinejad, E. Ahmadi Sangachin, and S. H. Asadpour. "Long wavelength superluminal pulse propagation in a defect slab doped with GaAs/AlGaAs multiple quantum well nanostructure." Modern Physics Letters B 29, no. 33 (December 10, 2015): 1550216. http://dx.doi.org/10.1142/s0217984915502164.

Full text

Abstract:

In this paper, long wavelength superluminal and subluminal properties of pulse propagation in a defect slab medium doped with four-level GaAs/AlGaAs multiple quantum wells (MQWs) with 15 periods of 17.5 nm GaAs wells and 15 nm [Formula: see text] barriers is theoretically discussed. It is shown that exciton spin relaxation (ESR) between excitonic states in MQWs can be used for controlling the superluminal and subluminal light transmissions and reflections at different wavelengths. We also show that reflection and transmission coefficients depend on the thickness of the slab for the resonance and nonresonance conditions. Moreover, we found that the ESR for nonresonance condition lead to superluminal light transmission and subluminal light reflection.

APA, Harvard, Vancouver, ISO, and other styles

13

Hao, Qi, and Alexey Stovas. "Approximate reflection coefficients for a thin VTI layer." GEOPHYSICS 83, no. 1 (January 1, 2018): C1—C11. http://dx.doi.org/10.1190/geo2016-0638.1.

Full text

Abstract:

We have developed an approximate method to derive simple expressions for the reflection coefficients of P- and SV-waves for a thin transversely isotropic layer with a vertical symmetry axis (VTI) embedded in a homogeneous VTI background. The layer thickness is assumed to be much smaller than the wavelengths of P- and SV-waves inside. The exact reflection and transmission coefficients are derived by the propagator matrix method. In the case of normal incidence, the exact reflection and transmission coefficients are expressed in terms of the impedances of vertically propagating P- and S-waves. For subcritical incidence, the approximate reflection coefficients are expressed in terms of the contrast in the VTI parameters between the layer and the background. Numerical examples are designed to analyze the reflection coefficients at normal and oblique incidence and investigate the influence of transverse isotropy on the reflection coefficients. Despite giving numerical errors, the approximate formulas are sufficiently simple to qualitatively analyze the variation of the reflection coefficients with the angle of incidence.

APA, Harvard, Vancouver, ISO, and other styles

14

Bautista, Eric-Gustavo, Federico Méndez, and Oscar Bautista. "Asymptotic Formulas for the Reflection/Transmission of Long Water Waves Propagating in a Tapered and Slender Harbor." Journal of Applied Mathematics 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/184147.

Full text

Abstract:

We obtain asymptotic formulas for the reflection/transmission coefficients of linear long water waves, propagating in a harbor composed of a tapered and slender region connected to uniform inlet and outlet regions. The region with variable character obeys a power-law. The governing equations are presented in dimensionless form. The reflection/transmission coefficients are obtained for the limit of the parameterκ2≪1, which corresponds to a wavelength shorter than the characteristic horizontal length of the harbor. The asymptotic formulas consider those cases when the geometry of the harbor can be variable in width and depth: linear or parabolic among other transitions or a combination of these geometries. For harbors with nonlinear transitions, the parabolic geometry is less reflective than the other cases. The reflection coefficient for linear transitions just presents an oscillatory behavior. We can infer that the deducted formulas provide as first approximation a practical reference to the analysis of wave reflection/transmission in harbors.

APA, Harvard, Vancouver, ISO, and other styles

15

Fu, Chong, and Pei Jun Wei. "The Wave Propagation through the Imperfect Interface between Two Micropolar Solids." Advanced Materials Research 803 (September 2013): 419–22. http://dx.doi.org/10.4028/www.scientific.net/amr.803.419.

Full text

Abstract:

in this paper, the reflection and transmission problem of the coupled transverse displacement and transverse rotational waves at the imperfect interface between two different micropolar solids are studied. First, the boundary conditions between two micropolar solids with imperfect interface are used to derive the linear algebraic equation sets. Then, the linear algebraic equation sets are solved numerically and the results are shown graphically. Finally, the influence of the interface parameter reflecting the imperfect degree of interface on the reflection and the transmission coefficients are discussed based on the numerical results.Keyword: reflection and transmission, imperfect interface, micropolar solid, coupled waves.

APA, Harvard, Vancouver, ISO, and other styles

16

Stoyko, Darryl K., Neil Popplewell, and Arvind H. Shah. "Reflection and Transmission Coefficients from Rectangular Notches in Pipes." Strojniški vestnik – Journal of Mechanical Engineering 60, no. 5 (May 15, 2015): 349–62. http://dx.doi.org/10.5545/sv-jme.2014.1836.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Arruda, J. R. F., F. Gautier, and L. V. Donadon. "Computing reflection and transmission coefficients for plate reinforcement beams." Journal of Sound and Vibration 307, no. 3-5 (November 2007): 564–77. http://dx.doi.org/10.1016/j.jsv.2007.06.052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Santos, Juan E., Jaime M. Corbero, Claudia L. Ravazzoli, and Jeffrey L. Hensley. "Reflection and transmission coefficients in fluid‐saturated porous media." Journal of the Acoustical Society of America 91, no. 4 (April 1992): 1911–23. http://dx.doi.org/10.1121/1.403702.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Hsue, Ching-Wen, and Charles D. Hechtman. "Frequency-insensitive transmission and reflection coefficients of multilayer media." Journal of the Optical Society of America A 6, no. 11 (November 1, 1989): 1669. http://dx.doi.org/10.1364/josaa.6.001669.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Fa, Lin, J. P. Castagna, and HeFeng Dong. "An accurately fast algorithm of calculating reflection/transmission coefficients." Science in China Series G: Physics, Mechanics and Astronomy 51, no. 7 (June 22, 2008): 823–46. http://dx.doi.org/10.1007/s11433-008-0076-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Ripoll, J., and M. Nieto-Vesperinas. "Reflection and transmission coefficients for diffuse photon density waves." Optics Letters 24, no. 12 (June 15, 1999): 796. http://dx.doi.org/10.1364/ol.24.000796.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Plona, Thomas J., David Linton Johnson, and Ralph D'Angelo. "Slow waves, boundary conditions, and reflection and transmission coefficients." Journal of the Acoustical Society of America 88, S1 (November 1990): S120. http://dx.doi.org/10.1121/1.2028546.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Latham, R. D., B. J. Rubal, N. Westerhof, P. Sipkema, and R. A. Walsh. "Nonhuman primate model for regional wave travel and reflections along aortas." American Journal of Physiology-Heart and Circulatory Physiology 253, no. 2 (August 1, 1987): H299—H306. http://dx.doi.org/10.1152/ajpheart.1987.253.2.h299.

Full text

Abstract:

Arterial pulse transmission and wave reflections were studied in five mature anesthetized baboons (Papio anubis) using multisensor micromanometry. Simultaneous pressures were recorded from the left ventricle and every 10 cm along the aorta and its terminal branches, and flow velocity was measured in the aortic root. Aortic input impedance and regional foot-to-foot and apparent phase velocities were calculated. Aortography provided dimensional data for local reflection coefficients. Regional foot-to-foot wave speeds were somewhat lower than corresponding segments in humans. Proximal aortic pressure waveforms and characteristic impedance (110 +/- 29 dyn X s X cm-5) were not characteristic of middle-aged humans. Reflection coefficients at the terminal aortic bifurcation (0.06) at the level of the renal artery branches (0.09) were less than those found in humans. We conclude that the junction of the renal artery branches and the aorta in the baboon is closely matched and represents much less of a discrete reflection site than in humans. Although the baboon may be used to study pulse transmission characteristics in the baboon, this species is not a good model for the proximal systemic reflective characteristics of normal middle-aged humans.

APA, Harvard, Vancouver, ISO, and other styles

24

Te-Wen Pan and Ching-Wen Hsue. "Modified transmission and reflection coefficients of nonuniform transmission lines and their applications." IEEE Transactions on Microwave Theory and Techniques 46, no. 12 (1998): 2092–97. http://dx.doi.org/10.1109/22.739287.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Araki, Susumu, Daiki Watanabe, Shin-ichi Kubota, and Masaya Hashida. "EVALUATION OF HYDRAULIC PERFORMANCE OF WAVE DISSIPATING BLOCK USING POROSITY." Coastal Engineering Proceedings, no. 36v (December 31, 2020): 29. http://dx.doi.org/10.9753/icce.v36v.papers.29.

Full text

Abstract:

The reflection and transmission of wave dissipating work mainly depend on the shape and porosity of wave dissipating block. However, the influence of the shape and porosity of wave dissipating block on the reflection and transmission has not been investigated sufficiently. The purpose of this study is to investigate the influence of the porosity of wave dissipating block on the reflection and transmission coefficients through a series of hydraulic experiments where four kinds of wave dissipating blocks were used. Wave dissipating blocks with smaller porosity provided a larger reflection coefficient and a smaller transmission coefficient as a whole. However, a wave dissipating block provided a smaller reflection coefficient and a smaller transmission coefficient in spite of relatively larger porosity. The measured reflection and transmission coefficients were compared with those estimated by existing equations.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/lqyzabMw66U

APA, Harvard, Vancouver, ISO, and other styles

26

MKRTCHYAN, A. R., A. G. HAYRAPETYAN, B. V. KHACHATRYAN, and R. G. PETROSYAN. "TRANSFORMATION OF SOUND AND ELECTROMAGNETIC WAVES IN NON-STATIONARY MEDIA." Modern Physics Letters B 24, no. 18 (July 20, 2010): 1951–61. http://dx.doi.org/10.1142/s021798491002433x.

Full text

Abstract:

Transformation (reflection and transmission) of sound and electromagnetic waves are considered in non-stationary media, properties of which abruptly change in time. Reflection and transmission coefficients for both amplitudes and intensities of sound and electromagnetic waves are obtained. Quantitative relations between the reflection and transmission coefficients for both sound and electromagnetic waves are given. The sum of the energy flux reflection and transmission coefficients for both types of waves is not equal to one (for sound waves it is greater than one). The energy of both waves is not conserved, that is, exchange of the energy occurs between the corresponding waves and medium. As a result, the sound wave obtains a notable property: the transmitting wave carries energy equal to the sum of the energies of the incident and reflected waves. A possibility of the amplification of sound waves and transformation of their frequencies is illustrated.

APA, Harvard, Vancouver, ISO, and other styles

27

SINGH, S. S. "TRANSMISSION OF ELASTIC WAVES IN ANISOTROPIC NEMATIC ELASTOMERS." ANZIAM Journal 56, no. 4 (April 2015): 381–96. http://dx.doi.org/10.1017/s1446181115000061.

Full text

Abstract:

The problem of reflection and refraction of elastic waves due to an incident quasi-primary $(qP)$ wave at a plane interface between two dissimilar nematic elastomer half-spaces has been investigated. The expressions for the phase velocities corresponding to primary and secondary waves are given. It is observed that these phase velocities depend on the angle of propagation of the elastic waves. The reflection and refraction coefficients corresponding to the reflected and refracted waves, respectively, are derived by using appropriate boundary conditions. The energy transmission of the reflected and refracted waves is obtained, and the energy ratios and the reflection and refraction coefficients are computed numerically.

APA, Harvard, Vancouver, ISO, and other styles

28

Sukaphone, Phetthanan, and Buonkun Ounlesy Yaxasiht. "Wave Breaker Model of Transmission Waves." Journal La Multiapp 2, no. 1 (April 21, 2021): 35–40. http://dx.doi.org/10.37899/journallamultiapp.v2i1.342.

Full text

Abstract:

The wavelength, the wave height, and the depth of the water under which the waves travel are critical criteria for describing water waves. According to previous research, the depth and period of the waves have a significant effect on the propagation and reflection coefficients. The hollow breakwater's varied model is supposed to minimize wave reflection and propagation in addition to reducing wave reflection, due to its capacity to capture and reduce incident wave energy.

APA, Harvard, Vancouver, ISO, and other styles

29

Hou, Wanting, Li-Yun Fu, and Jose M. Carcione. "Reflection and transmission of thermoelastic waves in multilayered media." GEOPHYSICS 87, no. 3 (March 8, 2022): MR117—MR128. http://dx.doi.org/10.1190/geo2021-0542.1.

Full text

Abstract:

In many cases, multilayered media with flat interfaces are a suitable representation of the geologic features of the crust. In general, the isothermal theory is used, and the transfer-matrix (TM) method is applied to compute the scattering reflection and transmission (R/T) coefficients. We have generalized the TM algorithm to the more general case of thermoelastic layers, in which elastic waves give rise to a temperature field (the thermal [T] wave) and vice versa. The stress-strain relation is based on the Lord-Shulman (LS) thermoelasticity theory. Then, the R/T coefficients of the fast compressional (P), T, and shear (S) waves are computed and verified by the conservation of energy. We also obtain the energy ratios and phase angles for P- and S-wave incidences. We consider a hot dry rock (HDR) geothermal model to study the effects of temperature, frequency, and layer thickness, and we find that the coefficients potentially can be used to obtain information about the characteristics of a multilayered medium.

APA, Harvard, Vancouver, ISO, and other styles

30

Krawczuk, Marek, Magdalena Palacz, Arkadiusz Zak, and Wiesław M. Ostachowicz. "Transmission and Reflection Coefficients for Damage Identification in 1D Elements." Key Engineering Materials 413-414 (June 2009): 95–100. http://dx.doi.org/10.4028/www.scientific.net/kem.413-414.95.

Full text

Abstract:

According to the latest research results presented in the literature changes in propagating waves are one of the most promising parameters for damage identification algorithms. Numerous publications describe methods of damage identification based on the analysis of signals reflected from damage. They also include complicated signal processing techniques. Such methods work well for damage localisation, but it is rather difficult to use them in order to estimate the size of damage. It is natural that propagating wave reflects from any structural discontinuity. The bigger the disturbance the bigger part of a propagating wave reflects from it. The amount of energy reflected and transmitted through any discontinuity can expressed as reflection and transmission coefficients. In the literature different application for these coefficients may be found – the most often cited application is connected with localising changes in the geometry of structures. Changes in the coefficients due to cross section variations in rods and beams or due to existence of stiffeners in plates are well documented. However there are no application of using the reflection and transmission coefficients for damage size identification. For this reason the analysis presented in this paper has been carried out. The article presents a method of damage identification in 1D elements based on the wave propagation phenomenon and changes in reflection and transmission coefficients. The changes in transmission and reflection coefficients for waves propagating in isotropic rods with different types of damage have been analysed. The rods have been modelled with the elementary, two and three mode theories or rods. For numerical modelling the Spectral Finite Element Method has been used. Several examples are given in the paper.

APA, Harvard, Vancouver, ISO, and other styles

31

Gubaidullin, Damir Anvarovich, and Ramil Nakipovich Gafiyatov. "Reflection and Transmission of Acoustic Waves through the Layer of Multifractional Bubbly Liquid." MATEC Web of Conferences 148 (2018): 15001. http://dx.doi.org/10.1051/matecconf/201814815001.

Full text

Abstract:

The mathematical model that determines reflection and transmission of acoustic wave through a medium containing multifractioanl bubbly liquid is presented. For the water-water with bubbles-water model the wave reflection and transmission coefficients are calculated. The influence of the bubble layer thickness on the investigated coefficients is shown. The theory compared with the experiment. It is shown that the theoretical results describe and explain well the available experimental data. It is revealed that the special dispersion and dissipative properties of the layer of bubbly liquid can significantly influence on the reflection and transmission of acoustic waves in multilayer medium

APA, Harvard, Vancouver, ISO, and other styles

32

Klimeš, Luděk. "Weak‐contrast reflection–transmission coefficients in a generally anisotropic background." GEOPHYSICS 68, no. 6 (November 2003): 2063–72. http://dx.doi.org/10.1190/1.1635060.

Full text

Abstract:

Explicit equations for approximate linearized reflection–transmission coefficients at a generally oriented weak‐contrast interface separating two generally and independently anisotropic media are presented. The equations are derived also for all singular directions and are thus valid in degenerate cases (e.g., in an isotropic background). The equations are expressed in general Cartesian coordinates, with arbitrary orientation of the interface. The explicit equations for linearized reflection–transmission coefficients have a very simple form—much simpler than the equations published previously. The equations for all reflection–transmission coefficients, with the exception of the unconverted transmitted wave, have a common form. The form of the equations is very suitable for inversion and for analyzing the sensitivity of seismic data to discontinuities in individual elastic moduli. The factors of proportionality of the contrasts of elastic moduli and density are expressed in terms of the slowness and polarization vectors of the corresponding generated wave and incidentwave.

APA, Harvard, Vancouver, ISO, and other styles

33

Panda, Srikumar, and Subash C. Martha. "WATER-WAVES SCATTERING BY PERMEABLE BOTTOM IN TWO-LAYER FLUID IN THE PRESENCE OF SURFACE TENSION." Mathematical Modelling and Analysis 22, no. 6 (November 27, 2017): 827–51. http://dx.doi.org/10.3846/13926292.2017.1386239.

Full text

Abstract:

In the present paper, reflection and transmission phenomena of water waves due to undulating permeable bottom in a two-layer fluid system are investigated using two-dimensional linearized theory. The effect of surface tension on the free surface is included in this work. In two-layer fluid system, there exist waves with two different wave numbers (modes). When a wave of a particular wave number encounters the undulating bottom, reflection and transmission phenomena occur in both the layers. The reflection and transmission coefficients in both layers due to incident waves of both modes are analyzed with the aid of perturbation analysis along with Fourier transform technique. It is found that these coefficients are obtained in terms of integrals which depend on the shape function of the undulating bottom. Two different kinds of undulating bottoms are considered to determine these coefficients. For a particular undulating bottom, namely sinusoidal bottom undulation the effect of various physical parameters such as number of ripples, surface tension and porous effect parameters are demonstrated graphically. The study further elaborates the energy balance relations associated with the reflection and transmission coefficients to ascertain the correctness of all the computed results.

APA, Harvard, Vancouver, ISO, and other styles

34

Wapenaar, Kees. "Seismic reflection and transmission coefficients of a self-similar interface." Geophysical Journal International 135, no. 2 (November 1998): 585–94. http://dx.doi.org/10.1046/j.1365-246x.1998.00679.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Boonserm, P., T. Ngampitipan, and K. Sansuk. "Reflection and transmission coefficients from the superposition of various potentials." Journal of Physics: Conference Series 1366 (November 2019): 012035. http://dx.doi.org/10.1088/1742-6596/1366/1/012035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Oughstun, Kurt E., and Christopher L. Palombini. "Fresnel Reflection and Transmission Coefficients for Temporally Dispersive Attenuative Media." Radio Science 53, no. 11 (November 2018): 1382–97. http://dx.doi.org/10.1029/2018rs006646.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Mallick, Subhashis, and L. Neil Frazer. "Reflection/transmission coefficients and azimuthal anisotropy in marine seismic studies." Geophysical Journal International 105, no. 1 (April 1991): 241–52. http://dx.doi.org/10.1111/j.1365-246x.1991.tb03459.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Krebes, E. S., and P. F. Daley. "Difficulties with computing anelastic plane-wave reflection and transmission coefficients." Geophysical Journal International 170, no. 1 (July 2007): 205–16. http://dx.doi.org/10.1111/j.1365-246x.2006.03349.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Yazarloo, B. H., and H. Mehraban. "The Relativistic Transmission and Reflection Coefficients for Woods-Saxon Potential." Acta Physica Polonica A 129, no. 6 (June 2016): 1089–92. http://dx.doi.org/10.12693/aphyspola.129.1089.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Jeong, Woo Chang, and Yong Sik Cho. "Estimation of reflection and transmission coefficients with finite element method." KSCE Journal of Civil Engineering 6, no. 3 (September 2002): 359–64. http://dx.doi.org/10.1007/bf02829158.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Pšenčík, Ivan, Miłosz Wcisło, and Patrick F. Daley. "SH plane-wave reflection/transmission coefficients in isotropic, attenuating media." Journal of Seismology 26, no. 1 (November 22, 2021): 15–34. http://dx.doi.org/10.1007/s10950-021-10052-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Achenbach, J. D. "An Application of Elastodynamic Reciprocity to Reflection by an Obstacle in a Waveguide." Journal of Mechanics 16, no. 2 (June 2000): 97–101. http://dx.doi.org/10.1017/s1727719100001660.

Full text

Abstract:

ABSTRACTThe reciprocal identity which connects two elastodynamic states, denoted by A and B, is used in this paper to obtain two results for an elastic layer. The first is an orthogonality condition for wave modes. For that case the states A and B are wave modes propagating in the same direction. The second result concerns reflection and transmission of wave motion by an obstacle in the layer. Now state A is defined by a superposition of incident wave modes and its reflection and transmission by the obstacle. Expressions for the reflection and transmission coefficients are obtained by selecting counter propagating wave modes for state B. It is also shown that the reflection by an obstacle in a layer can be extended to obtain the reflection and transmission coefficients for a planar array of obstacles in an unbounded elastic solid. For clarity all results are presented for horizontally polarized transverse wave motion.

APA, Harvard, Vancouver, ISO, and other styles

43

Razavy, M. "Reflection and Transmission Coefficients for Two- and Three-Dimensional Quantum Wires." International Journal of Modern Physics B 11, no. 23 (September 20, 1997): 2777–90. http://dx.doi.org/10.1142/s0217979297001350.

Full text

Abstract:

The problem of a quantum wire connected smoothly on both sides to leads of variable cross section is studied. A method for solving this problem in terms of a set of nonlinear first order matrix differential equations for the variable reflection amplitude is discussed. The reflection coefficient obtained in this way is directly related to the conductivity, and is calculated as a function of the energy of the ballistic electrons. This formulation can be applied to three-dimensional as well as two dimensional quantum wires. For two specific cases the reflection coefficient is obtained as a function of the wave number of the incident electron, and the contribution of quantum tunneling to the transmission in each case is demonstrated. Also a model with a dissipative force is introduced and its effect on the transmission of the electrons is investigated.

APA, Harvard, Vancouver, ISO, and other styles

44

Qi, Qiaomu, Jun-Xin Cao, Xing-Jian Wang, and Jiajia Gao. "Influence of interface condition on reflection of elastic waves in fluid-saturated porous media." GEOPHYSICS 86, no. 4 (July 1, 2021): MR223—MR233. http://dx.doi.org/10.1190/geo2020-0624.1.

Full text

Abstract:

The characteristics of P-wave reflection coefficients can be dependent on the properties of the interface separating the two dissimilar poroelastic media. To evaluate the influence of the interface condition, we have developed a general theoretical formulation of seismic reflection and transmission of waves at arbitrary incidence angles in fluid-saturated porous media. The formulation is derived based on the quasistatic Biot’s theory and incorporates a more general boundary condition for fluid pressure. Simple analytic expressions are obtained for reflection and transmission coefficients at normal incidence. The equations incorporate an interfacial impedance that can be used to effectively characterize the interface condition. Based on the new formulation, we study the coupled effects of dynamic fluid flow and the interface condition on the reflection and transmission coefficients. Two pertinent reflection scenarios in exploration geophysics are considered in the numerical analysis, i.e., a gas-water contact and a free fluid overlying a gas-saturated medium. We examine the corresponding P-wave reflection coefficient resulting from different interface conditions such as imperfect hydraulic contact, capillary pressure, and open- and sealed-pore interfaces. Our results reveal that the interface condition can affect the frequency dependence and amplitude-versus-angle signatures of the reflection coefficient.

APA, Harvard, Vancouver, ISO, and other styles

45

Abdoulatuf, A., V.-H. Nguyen, C. Desceliers, and S. Naili. "A numerical study of ultrasonic response of random cortical bone plates." Vietnam Journal of Mechanics 39, no. 1 (March 30, 2017): 79–95. http://dx.doi.org/10.15625/0866-7136/9342.

Full text

Abstract:

A probabilistic study on ultrasound wave reflection and transmission from cortical bone plates is proposed. The cortical bone is modeled by an anisotropic and heterogeneous elastic plate sandwiched between two fluids and has randomly varied elastic properties in the thickness direction. A parametric stochastic model is proposed to describe the elastic heterogeneity in the plate. Reflection and transmission coefficients are computed via the semi-analytical finite element (SAFE) method. The effect of material heterogeneity on reflected and transmitted waves is investigated from a probabilistic point of view. The parametric study highlights effects of the uncertainty of material properties on the reflection and transmission coefficients by varying the frequency, angle of incidence and bone thickness.

APA, Harvard, Vancouver, ISO, and other styles

46

Busatti, E., A. Ciucci, M. De Rosa, V. Palleschi, S. Rastelli, M. Lontano, and N. Lunin†. "Propagation of electromagnetic waves in inhomogeneous plasmas." Journal of Plasma Physics 52, no. 3 (December 1994): 443–56. http://dx.doi.org/10.1017/s0022377800027240.

Full text

Abstract:

The reflection and transmission coefficients for an electromagnetic beam propagating in an inhomogeneous plasma are calculated analytically using the Magnus approximation in different physical configurations. The theoretical predictions for such coefficients are expressed in simple analytical form, and are compared with the exact results obtained by numerical solution of the wave propagation equations, using the Berreman 4 × 4 matrix method. It is shown that the theoretical approach is able to reproduce the correct results for reflection and transmission coefficients over a wide range of physical parameters. The accuracy of the theoretical analysis, at different orders of approximation, is also discussed.

APA, Harvard, Vancouver, ISO, and other styles

47

Nikiforov, A. A. "Propagation and interaction with obstructions of acoustic waves in vapor-gas-liquid media." Proceedings of the Mavlyutov Institute of Mechanics 9, no. 1 (2012): 121–24. http://dx.doi.org/10.21662/uim2012.1.023.

Full text

Abstract:

Transmission and reflection of acoustic waves from a layer of a bubble medium into a liquid is theoretically studied, with subsequent reflection of the waves that arise from the rigid wall. The amplitudes of the emerging waves are determined through the amplitude of the initial wave, analytical expressions are obtained for the coefficients of reflection and transmission of waves across the interfaces.

APA, Harvard, Vancouver, ISO, and other styles

48

Simon, María C., and Rodolfo M. Echarri. "Internal Reflection in Uniaxial Crystals, III: Transmission and Reflection Coefficients for an Extraordinary Incident Wave." Journal of Modern Optics 37, no. 6 (June 1990): 1139–48. http://dx.doi.org/10.1080/09500349014551161.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Alkhalidi, Mohamad, Noor Alanjari, and S. Neelamani. "Wave Interaction with Single and Twin Vertical and Sloped Slotted Walls." Journal of Marine Science and Engineering 8, no. 8 (August 6, 2020): 589. http://dx.doi.org/10.3390/jmse8080589.

Full text

Abstract:

The interaction between waves and slotted vertical walls was experimentally studied in this research to examine the performance of the structure in terms of wave transmission, reflection, and energy dissipation. Single and twin slotted barriers of different slopes and porosities were tested under random wave conditions. A parametric analysis was performed to understand the effect of wall porosity and slope, the number of walls, and the incoming relative wave height and period on the structure performance. The main focus of the study was on wave transmission, which is the main parameter required for coastal engineering applications. The results show that reducing wall porosity from 30% to 10% decreases the wave transmission by a maximum of 35.38% and 38.86% for single and twin walls, respectively, increases the wave reflection up to 47.6%, and increases the energy dissipation by up to 23.7% on average for single walls. For twin-walls, the reduction in wall porosity decreases the wave transmission up to 26.3%, increases the wave reflection up to 40.5%, and the energy dissipation by 13.3%. The addition of a second wall is more efficient in reducing the transmission coefficient than the other wall parameters. The reflection and the energy dissipation coefficients are more affected by the wall porosity than the wall slope or the existence of a second wall. The results show that as the relative wave height increases from 0.1284 to 0.2593, the transmission coefficient decreases by 21.2%, the reflection coefficient decreases by 15.5%, and the energy dissipation coefficient increases by 18.4% on average. Both the transmission and the reflection coefficients increase as the relative wave length increases while the energy dissipation coefficient decreases. The variation in the three coefficients is more significant in deep water than in shallower water.

APA, Harvard, Vancouver, ISO, and other styles

50

Reinisch, R., M. Neviere, G. Tayeb, and E. Popov. "Symmetry relations for reflection and transmission coefficients of magneto-optic systems." Optics Communications 205, no. 1-3 (April 2002): 59–70. http://dx.doi.org/10.1016/s0030-4018(02)01322-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!