In 3-D exploration by multiple component,the vertical velocity of P wave,Thomsen parameter δ and azimuth angle of the cracks is inversed through P-P wave NMO velocity that varies with azimuth. S 1-S 1 NMO velocity in different azimuth angle can be obtained by using P-P and P-S 1 NMO velocity and the vertical velocity of S 1 wave and the Thomsen parameter γ is inversed.
In this paper,the processing and analyzing method of mean P-wave emergence angle and azimuth angle from the digital seismic records is given,and the anomalous variations of mean P-wave emetgence and azimuth angle before Datong(ML=6.1) and Tangshan(ML=5.6) earthquakes have emphatically been studied. Finally,the seismic wave dynamical characteristics are preliminarily discussed as a kind of precursory phenomena before large earthquake.
Firstly,this paper gave out definationsof parameters, the well inclination, azimuth angle, high-edge face angle of the drlling tool and magnetic face angle for the analysis of the MWD tool. Then a series of mathematical models on determining bore-hole pa-rameters were studied.
1. The effect of Faraday rotation on the azimuths of transverse fields observed by the Solar Magnetic Field Telescope at the Huairou Solar Observing Station.
In order to adapt to the observational condition of magnetic declination and inclination with the high resolution and precision magnetograph,the azimuths among 7 measurement platforms and 4 azimuth marks in reconstructed Jinghai station,Seismological Bereau of Tianjing,are precisely measured by using classical astrogeodetic method,and 38 parameters with average error ±1.2″are gained. After the measurements, 7 sets of instrument can be used at same time in allweather.
The generalized directional function DG is defined as the ratio of P amplitude spectrums recorded at station 1 and station 2 DG= , through Gomparison between the recorded DG curve and theoretical curves, the ratio of fracture lengths in two opposite directions of a bilateral fracture, and the angle between the station 1 and the main rupturing propagating direction can be determined simultaneously.
Through coordinate transforming, a common-azimuth prestack tau migration technology that recursively continues the source and receiver wavefields and picks up the migrated results in the two-way vertical traveltime (tau) direction is developed.
The migrations of synthetic data sets of SEG/EAGE salt model prove that our common-azimuth migration approaches are effective in both depth and tau domains.
Mismatch negativity has been studied under the conditions of dichotic stimulation by deviant stimuli that either changed their azimuth from zero to 4.5°, 13.5°, and 22.5° or moved with small velocities from the head midline to one of the ears.
The dependences of the diffraction efficiency, ellipticity, and polarization orientation of the diffraction beam on the azimuth angle of polarization of an incident Bragg beam are derived.
As a result, the current distributions along the hexagonal loops are expressed analytically in terms of the azimuth angle for various sizes of large loops.
A method is proposed for the determination of the position and inclination angles of the plane of a spiral galaxy based on the assumption that every spiral arm is a monotonic function of the radius and/or the azimuthal angle.
The coefficient α(θ) of ultrasound transmission from liquid 4He to an aluminum single crystal in intermediate, superconducting, and normal states at a temperature T ≈ 0.1 K is measured as a function of the polar angle θ at the azimuthal angle φ = 0.
In the second resonance region of photon energies, the differential yields of neutral and charged pions are measured in the (γ, πp) reactions on Li, C, and Al nuclei versus the proton energy and the azimuthal angle of pion emission.
It is shown that, unlike the lowest order mode, the higher order modes, which primarily depend on the curvature of the boundary, demonstrate a weak nonreciprocity of propagation in directions with opposite azimuths.
The polarization-interference method for direct measurements of the spread in the polarization azimuths of the object field for the rough surface is considered.
The calculation of invariants and the tensor ratio can also be used for the development of procedures enabling automatic estimation of the axis strike azimuths of elongated anomaly-forming bodies.
The geomagnetic effects of solar flares of importance 3 and 3~+ in the sunspot regions of magnetic classes γ and β_γ during 1938—1958, are examined statistically according to the declination of the sun, the position angle of the sun's axis of rotation from the north point of the disk, and the heliographic coordinates of the flare. The results of correlation and regression analysis are drawn on the heliographic chart as isolines of geomagnetic disturbance. The data of the solar wind velocity, measured by the...
In this paper, a model for flare-produced shock wave near the Earth's orbit is obtained based on the east-west asymmetry of Forbush decrease amplitude with the longitudinal distribution of parent flares. It is found that the shock wave propagates anisotropically and shows the east-west asymmetry. A region of intensive magnetic field is in the west part of shock wave and weak in the east. Contrary to this, distri-bution of dynamic parameters and plasma parameters are such that the east part is higher than th...
The influence of interplaneatry propagation upon the peak spectrum of the solar cosmic say events are discussed in terms of the dimensional solution for the propagation equation with emphasis on the importance of the propagation correction of spectrum.Solar wind convection is one of the probable causes of flattening in low energy spectrum.Under certain conditions,an injected power-law spectrum may change into an observed exponential one,and a kinetic energy spectrum into a rigidity one.The power index of sp...
方位角
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