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Read e-book online Automatic Text Processing: The Transformation Analysis and PDF

By Gerard Salton

ISBN-10: 0201122278

ISBN-13: 9780201122275

Automated textual content Processing: The Transformation research and Retrieval of data through laptop

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Additional resources for Automatic Text Processing: The Transformation Analysis and Retrieval of Information by Computer

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63). 8, which amounts to a variation of about 50% in f and in the quadratic term as a whole. This could lead to a tangible change in phase velocity provided the quadratic term itself were significant. However, the quadratic term vanishes for 0 - 0 ~ and ~ - 90 ~ and remains relatively small at intermediate angles. 63) can be used. 5. 63) turn out to be overstated because the contribution of the neglected higher-order terms reduces the influence of Vso even further. 6%. 8 shows the influence of Vso on the exact P-wave phase velocity for several combinations of e and 5.

4 Q.. 1. 5 (solid). 23)]. , 2000b), its application in seismic inversion and processing is hampered by the large number of independent stiffness elements. 23)]. If the symmetry planes have to be identified, as is often the case in surface seismic surveys, the number of independent parameters to be found from seismic data increases to 12. Here, we follow Tsvankin (1997c) in introducing a Thomsen-style notation that simplifies considerably the description of a wide range of seismic signatures for orthorhombic media.

5- ................ 8" D e p e n d e n c e of P - w a v e p h a s e v e l o c i t y on t h e s h e a r - w a v e v e r t i c a l v e l o c i t y Vso. T h e d a s h e d c u r v e c o r r e s p o n d s t o V p o / V s o Vpo - 3 k m / s is fixed. 5; 26 C H A P T E R 1. E L E M E N T S OF BASIC T H E O R Y OF A N I S O T R O P I C WAVE P R O P A G A T I O N anisotropies e and 6, and Q denotes the quadratic and other higher-order terms in e and 5, which contain Vso. The negligibly weak dependence of the P-wave phase velocity on the S-wave vertical velocity implies that the influence of Vso should be small in all kinematic problems involving P-waves.

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Automatic Text Processing: The Transformation Analysis and Retrieval of Information by Computer by Gerard Salton

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