elastic waves in solids applications to signal processing

... non-principal Rayleigh waves in incompressible, transversely isotropic, pre-stressed elastic half-spaces is obtained in Section 3.2 The results are illustrated in respect of the so-called reinforcing ... A2312,A2321,A3212andA3221 3 Surface waves The analysis is specialized to Rayleigh waves propagating in a principal plane of the pre-strain, the plane x2= 0, but not in a principal direction The incremental equation ... fibre-reinforced elastic composites is common in engineering applications because these materials have a higher strength-to-weight ratio than classical isotropic materials used in the past Fibre-reinforced

Ngày tải lên: 16/12/2017, 07:04

... functions using the same transforms as in digital signal processing and a more extreme example is the processing of the information coded in the DNA sequence using signal processing techniques ... important role in many applications in signal processing and logic design In recent years the interest in developing methods that are based on Finite non-Abelian groups has been steadily growing, and ... for signal processing and logic design However, we believe that in due time there will be many more applications in the vast range of topics in which signal processing methods are applied 1.2 SIGNALS

Ngày tải lên: 24/05/2018, 08:11

... textbook address further topics in the study of meaning: domain, accounting for the ways in which simpler semantic units combine into larger configurations, the problems of domain matrix, semantic ... Cognitive Linguistics introduces and also tries to fulfill the following (i) Long - standing presence of an empirical methodology of investigation of linguistic matters (ii) Growing interest in an ... vision and imagination need careful and empirical investigation in years to come 4 Recent studies of cognitive linguistics in Vietnam In Vietnam, together with the advances in linguistic studies

Ngày tải lên: 28/03/2014, 11:20

... for Detecting Photo Realistic Images 9 Binary Image Watermarking Using Wavelet Domain of the Audio Signal 9-2 M-file for Binary Image Watermarking in Wavelet Domain of the Audio Signal Trang ... type of Genetic operators The Examples for every operators are listed below Note that the crossover point is selected by combining all the binary string into the single string 2.3.2 Heuristic ... global decision point to reach the destination faster Thus the final decision taken by A is to move to the point, which is the linear combination of OA, AA’ and AB’ Similarly the final decision taken

Ngày tải lên: 08/04/2014, 09:57

... array containing M elements suitably spaced is capable of increasing the information rate of a system by the factor M This increase is due to the increase in data fed into the system in an M-element ... improving the signal-to-interference ratio is to average signals This assumes that the interference is in- coherent and that the averaging will only increase the power associated with the interference ... to the square of the sum of the magnitudes Ideally, this results in an increase in signal-to-interference ratio prop- ortional to the number of samples averaged Correlation processing comes in

Ngày tải lên: 27/05/2014, 02:44

... 4Chapter- 1 Audio Signal Processing Audio signal processing, sometimes referred to as audio processing, is the intentional alteration of auditory signals, or sound As audio signals may be electronically ... film to use digital image processing to pixellate photography to simulate an android's point of view Trang 8Intelligent Transportation Systems Digital image processing has a wide applications in ... wider range of algorithms to be applied to the input data and can avoid problems such as the build-up of noise and signal distortion during processing Since images are defined over two dimensions

Ngày tải lên: 05/06/2014, 11:40

... University of Valencia Spain Trang 13Part 1 Elastic Waves in Solids Trang 151 Acoustic Waves in Layered Media - From Theory to Seismic Applications Alexey Stovas1 and Yury Roganov2 In practice, the ... viewpoints Shear waves (S-wave) are essential in the field of seafloor geotechnical applications as they propagate in solids More specifically interface waves and the use of the interface waves ... acoustic phenomena in PTC and PNC, including the studies of spectra of non-elastic scattering of light together with the experiments to observe the stimulated light scattering accompanying by the coherent

Ngày tải lên: 19/06/2014, 12:20

... due to scattering Note that for propagating waves,  This indicates that there is no scattering in the low frequency limit The low and high frequency limits In the low-frequency asymptotic ... propagating waves which is frequency independent This can be shown by considering the single mode plane k k k This equation defines the vertical slowness for a single mode transmitted wave initiated ... number of propagating wave modes will be changed In Figure 2, we show using the points M i i  with the initial position 0, 5 M0 defined by p and the 0 following positions crossing the boundaries

Ngày tải lên: 19/06/2014, 12:20

... for up-scaling within the centimetre scale (the intrinsic net-to-gross value controls the acoustic properties of the ultra-thin layers) It results in pseudo-log data including the intrinsic anisotropy ... seismic modelling is given by the matrix propagator method allows us to take into account all pure mode multiples, and resulting AVO attributes become frequency dependent Within this ultra-thin model ... modelling can also be used for inversion of real seismic data into net-to-gross and fluid saturation for ultra-thin reservoirs 11.1 SBED model The SBED software is based on manipulating sine-functions,

Ngày tải lên: 19/06/2014, 12:20

... (1951) 316 Mindlin R.D Influence of rotatory inertia and shear on flexural motions of isotropic, elastic plates, J Appl Mech., 18 (1951) 316 Mindlin R.D Vibrations of an infinite elastic plate ... Mindlin R.D Waves and vibrations in isotropic, elastic plates In Structural Mechanics (Editors J.N Goodier and N Hoff) (1960) 199 – 232 Mindlin R.D and McNiven H.D Axially symmetric waves in ... Dispersion of Rayleigh Waves in a Layer (in Russian), Publ Inst Seism Acad Sci U.R.S.S 119 (1947) 27 – 38 Graff K F Wave Motion in Elastic Solids, Dover Inc., N.Y., 1975 Hartman P Ordinary differential

Ngày tải lên: 19/06/2014, 12:20

... shown in Fig 9 F = Fres in both cases Trang 7A half-wavelength corresponds to a distance between neighbouring points with zero stress In a case a) this distance is 1 m and corresponds to a resonance ... resonators with any quantity of any layers, including the resonators with Bragg reflector For example, Fig 15a shows a frequency response of the resonator, containing an AlN active layer (1 m), two ... resonator with a Bragg reflector, containing three pairs of layers SiO2/W A thickness of a Bragg reflector layer is 0.38 m for SiO2 and 0.33 m for W (a quarter-wavelength in a corresponding material

Ngày tải lên: 19/06/2014, 12:20

... an intercalated layer between two semi-infinite crystal lattices We consider an infinitely long chain which contains a substitution impurity atom weakly coupled to the matrix atoms (see model in ... axis into a structure consisting of stacked layers of the closely packed .A - B - B - A - B - B - type To describe the interatomic interaction we shall restrict our attention to the central interaction ... These minima points to a slowdown of acoustic phonons due to their localization on the defect clusters and due to the scattering of additional phonons, remaining delocalized on the resulting quasi-localized

Ngày tải lên: 19/06/2014, 12:20

... the late-arriving coda waves inthe lunar seismograms bear a striking resemblance to the multiple scattering of elastic waves in the dry granular packing Some features of the laboratory experiments ... packings we need to take into account the internalreflections In this way, there will be some incoming flux due to the reflection at the boundaries and appropriate boundary conditions will require introducing ... presented the main steps to build up a theory for thepropagation of elastic waves in disordered granular packings Now we proceed to develop therigorous basis to modeling the multiple scattering and the

Ngày tải lên: 19/06/2014, 12:20

... of interface waves are discussed The techniques for using interface waves to estimate the seabed geoacoustic parameters are introduced and discussed including signal processing for extracting ... seafloor to generate both vertical and horizontal shear waves in the seafloor This enabled to measure both Scholte and Love waves and to inverse S-wave speed profile jointly, thereby obtaining information ... thick lines bracket the arrivals of the interface waves The slopes of the lines with respect to the time-axis define the speeds of the interface waves In this case the speeds appear to be in the

Ngày tải lên: 19/06/2014, 12:20

... related to the second dispersion branch of PNC containing the atmospheric air (see Fig 6) is equal to m0 = -24⋅10-30 kg; for PNC containing water we have m0 = -3,64⋅10-30 kg; and for PNC containing ... particles are implanted into the crystal pores by the technique of laser ablation As is seen in this Figure, the implantation of metal into the pores results in shifting the band-gap to higher frequencies, ... medium, e.g., the Raman scattering, the Brillouin scattering, the Bragg scattering etc In the case of Raman scattering the oscillatory quanta corresponding to the molecular vibrations are excited (or

Ngày tải lên: 19/06/2014, 12:20

... cases are listed in Table 1 From these error curves and Table 1 ( x       ), we find that E y z h r increases corresponding to the increase in the time and/or spatial increments for all ... discretization schemes hinges on their ability to minimize this effect In this section, following the analysis methods presented in Vichnevetsky (1979), Dablain (1986), and Yang et al (2006), we investigate ... force-source included in equation (20) is located at the centre point of the computational domain, and ∂f/∂x and ∂f/∂z are set to be zero in this example and other experiments in the following section

Ngày tải lên: 19/06/2014, 12:20

... generator ; with 1024±point cosine table range(0Àp) ; ; Prototype: void cos_sin(int, int *, int *) ; Entry: arg0: T0 À a (alpha) ; arg1: AR0 À pointer to cosine ; arg2: AR1 À pointer to sine .def ... of dual tones can be implemented by using two sinewave generators connected in parallel. Each sinewave generator can be realized using the polynomial approximation technique introduced in Section ... sine .def _cos_sin .ref tab_0_PI .sect "cos_sin" SINEWAVE GENERATORS AND APPLICATIONS 401 9 Practical DSP Applications in Communications There are many DSP applications that are used in our...

Ngày tải lên: 06/11/2013, 18:15

... 5,up to 35*/ { gain = gain_parameter; /*vary gain of sine*/ } FIGURE 1.6. GEL file to slide through different gain values in the sine generation program (gain.gel). FIGURE 1.7. Slider window ... generated has increased. Press the up-arrow key again to continue increasing the slider, incrementing by 5 up to 30. The amplitude of the sine wave should be about 2.5V p-p with a gain value set ... Software Pipelining 98 3.20 Constraints 99 3.20.1 Memory Constraints 99 3.20.2 Cross-Path Constraints 99 3.20.3 Load/Store Constraints 100 3.20.4 Pipelining Effects with More Than One EP within an FP...

Ngày tải lên: 15/03/2014, 17:20

... Continuous Signal Processing 243 DIGITAL FILTERS Chapter 14. Introduction to Digital Filters 261 Chapter 15. Moving Average Filters 277 Chapter 16. Windowed-Sinc Filters 285 Chapter 17. Custom ... science and engineering is done, and there is no better example of this than Digital Signal Processing. In the early 1980s, DSP was taught as a graduate level course in electrical engineering. A decade ... person making the application. Extensive and detailed testing is essential where incorrect functioning could result in personal injury or damage to property. The material in this book is intended...

Ngày tải lên: 13/09/2012, 10:21

... Sons, Inc. 32 x CONTENTS 9.1.7 Control Flow 402 9.1.8 Edit Window and M-file 403 9.2 Signal Processing Toolbox 405 9.2.1 List of Functions in Signal Processing Toolbox 406 References 414 Index ... shown in Figure 1.16; if so, what are the advantages of digital signal processing instead of analog signal processing, even though digital signal processing requires more circuits compared to analog ... purpose of signal processing is to modify the given signal such that the quality of information is improved in some well-defined meaning. For example, in mixing consoles for recording music, the...

Ngày tải lên: 13/09/2012, 10:21