КРИТИКА     

Karel Pěč  Gustáv Siráň 《Studia Geophysica et Geodaetica》1985,29(3):317-318

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Induction vector estimates in the Bohemian Massif and in the transition zone to the Carpathians     

Václav Petr  Jana Pěčová  Oldřich Praus  Reviewer A. Janáčková 《Studia Geophysica et Geodaetica》1984,28(2):172-177

u¶rt;m mam m u¶rt;uu n n mau au u n¶rt; anama. am m auu u au am aua ¶rt;a, m m unam ¶rt; u¶rt;au ua aau mn¶rt;mu n.  相似文献   

Transfer impedance of a probe in a drifting plasma     

Vladimŕ Fiala  František Blahák  Reviewer G. Siráň 《Studia Geophysica et Geodaetica》1984,28(2):178-187

au un¶rt;a umu ¶rt;a na nu nauuu ¶rt;a uam mmu amm na aa. amau aa auum m mnam u mu ¶rt;a, m unam ¶rt; ¶rt;uamuu u na.  相似文献   

Simple method for combined studies of macroseismic intensities and focal mechanisms     

J. Zahradník 《Pure and Applied Geophysics》1989,130(1):83-97

A simple method is presented for the computation of theoretical models of the macroseismic field, approximately valid close to the epicentre of a weak crustal earthquake. It is assumed that the intensity is logarithmically proportional to the energy flux of a complete directS wave. A circular source is used, whose energy-flux directivity is weak and thus simply predictable. The focal mechanism influences the solution through standard far-field double-couple radiation patterns. For the wave propagation in the layered crust the ray method is used, and a simple absorption correction is applied. Conversion coefficients at the earth's surface are included. To speed up repeated computations of the theoretical macroseismic fields for varying focal mechanisms, the ray quantities are computed (and stored) separately. This makes the program fast and simple enough even for routine applications on small microcomputers, whenever observed macroseismic fields, focal mechanisms, and hypocentre locations need joint interpretation.  相似文献   

Spherical harmonic expansion of the continents and oceans distribution function     

Uwe Koppelt  Martin Biegel  Reviewer K. Pěč 《Studia Geophysica et Geodaetica》1989,33(4):315-321

Summary An algorithm is derived to compute the coefficients of a spherical harmonic series for the functionE(, ) representing the distribution of continents and oceans with the least-squares method. Some properties of the system of normal equations, when measuring points are distributed in a regular grid, are discussed. The fully normalized complex coefficients to the ninth degree are given in the table.

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m mam nuam n uu uum ¶rt; uau ¶rt;a ¶rt; uu (, ), ma nm n¶rt;um an¶rt;u mum u a nu nu m¶rt;a auu a¶rt;am. ¶rt;am m ma um a au ¶rt; a, ¶rt;a uum mu an mu. m aua n um ¶rt;o ¶rt;m mnu nu¶rt;m mau.

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Bilateral recursive restitution of true ground motion from near-field and far-field seismograms     

V. Vavryčuk  A. Plešinger  Reviewer K. Pěč 《Studia Geophysica et Geodaetica》1989,33(2):133-145

Summary A two-sided recursive inverse filtering procedure, originally proposed by R. Vích, is used to restore the true ground motion from digital records of inertial electromagnetic seismographs. Numerical simulations of far-field and near-field P-wave seismograms are used to test the performance of the procedure and to derive criteria for recognizing successful restorations. The procedure is applied to seismograms of local microearthquakes as well as of teleseismic events, and the restored signals are compared with those obtained by causal (one-sided) inverse filtering. In all cases the two-sided approach proved to have fundamental advantages: a higher accuracy of the approximation of the true ground motion, a faster convergence to the best attainable approximation, a lower sensitivity to incoherent noise, and a more reliable discrimination between veracious and dubious results.  相似文献   

Higher-degree reference field in the generalized Stokes-Helmert scheme for geoid computation     

Petr Vaníček  Mehdi Najafi  Zdeněk Martinec  Lars Harrie  Lars E. Sjöberg 《Journal of Geodesy》1995,70(3):176-182

In this paper we formulate two corrections that have to be applied to the higher-degree reference spheroid if one wants to use it in conjunction with the Stokes-Helmert scheme for geoid determination. We show that in a precise geoid determination one has to apply the correction for the residual topographical potential and the correction for the earth ellipticity. Both these corrections may reach several decimetres; we show how their magnitudes vary within Canada and we give their global ranges.  相似文献   

Propagation velocity and radiation properties of induced tensile cracks     

Jan Kozák  Tomáš Lokajíček  Jan Šílený  Reviewer K. Pěč 《Studia Geophysica et Geodaetica》1983,27(2):133-142

nua ¶rt;u a¶rt;am m aa ¶rt;uaaa . ¶rt;u aam ¶rt; ¶rt; uu umuo au uu m a u a u am mu ma. mu anmau mu ma n¶rt; auumu m a aa u anau nu au. num ma uu nu un u n mu ma n¶rt;mauu n¶rt;um uu m umua. mam ¶rt;umum mu u aua n au muna ma a umua uu un. ¶rt; aauua am na mu ma, m uam ua u.  相似文献   

Motions of the rotational axis in an absolutely rigid earth     

Ján Hefty  Reviewer J. Vondrák 《Studia Geophysica et Geodaetica》1983,27(4):315-323

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Amplitude curves of seismic waves on the basis of hms: Observations, comparisons, conceptions     

J. Van k  N. V. Kondorskaya  I. V. Fedorova  L. Christoskov 《Tectonophysics》1983,93(3-4)

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