Geophysics
IntroBooks
feb. 2018 · IntroBooks
5,0star
1 mnenjereport
E-knjiga
40
Strani
family_home
Primerno
info
reportOcene in mnenja niso preverjeni. Več o tem
O tej e-knjigi
In the decade and a half since the preparation of the first edition of this script there have been few fundamental changes in the methods used in various geophysical surveys conducted within the small scale range. Not only that, the past few years has been witness to great changes in applications and sophistication of instrumentation. Surface energy sources used in VSP surveys are much the same as those used in surface seismic surveys. They include dynamite, vibrators, air guns, and mechanical impulse source. Buried dynamite charges are widely used as the surface energy source for VSP because of their effectiveness in producing seismic body waves. However, maintaining a consistent wavelet shape when shooting several tens of shots requires a great deal of care. Vibrators are attractive for use in VSP work. A pilot sweep can be designed and input to the ground that satisfies whatever resolution is required in VSP recording. Sweep parameters such as number of units, length of sweep, and number of sweeps can be selected that provides the desired signal-to-noise ratio. Also, cross-correlation of Vibroseis sweeps enhances signal-to-noise ratio by discriminating against noise outside of the sweep frequency range. Coherent noise with frequencies in the sweep bandwidth may present a problem but these can usually be solved in the data processing stage.
Ocene in mnenja
5,0
1 mnenje
Ocenite to e-knjigo
Povejte nam svoje mnenje.
Informacije o branju
Pametni telefoni in tablični računalniki
Namestite aplikacijo Knjige Google Play za Android in iPad/iPhone. Samodejno se sinhronizira z računom in kjer koli omogoča branje s povezavo ali brez nje.
Prenosni in namizni računalniki
Poslušate lahko zvočne knjige, ki ste jih kupili v Googlu Play v brskalniku računalnika.
Bralniki e-knjig in druge naprave
Če želite brati v napravah, ki imajo zaslone z e-črnilom, kot so e-bralniki Kobo, morate prenesti datoteko in jo kopirati v napravo. Podrobna navodila za prenos datotek v podprte bralnike e-knjig najdete v centru za pomoč.
