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(181) Japan and the United States have invested in computer technology to monitor and analyze seismic activity .

(182) Applying three-dimensional seismic data and seismic explanation, on the basis of drilling data, we analyze and describe the structural feature and fracture feature.

(183) The author demonstrated the time depth conversion method in detail by using geometry and gave practical calculation steps, and this fulfilled the conversion from seismic image to geological image.

(184) The paper discusses the principle of porosity prediction with seismic data based on the propagation theory of seismic wave in diphase medium.

(185) The " pre - seismic anomalous activity " is a relatively short burst.

(186) The lithology seismic inversion technique utilizes logging data with high vertical resolution, and accomplishes the constrained inversion of seismic data nearby wells.

(187) The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity, dominant frequency of seismic wavelet and aperture angle of migration processing.

(188) This is bad for seismic data processing, and it will inevitable result in low vertical resolution.

(189) A seismograph produces wavy lines that reflect the size of seismic waves passing beneath it.

(190) Wave equation time migration fails to image subsurface geological structure correctly in the case of obvious lateral seismic velocity variation.

(191) In forward modeling, seismic soiree is simulated by giving displacement boundary condition in form of time function. The migration algorithm is alike to that in finite difference method.

(192) The results show seismic amplitudes can be correlated to log lithologies and the interpretation accuracy can be improved by using 90?phase seismic data.

(193) The propagation velocity of seismic wave is dependent on the property of formations, such as formation component, elasticity, density, depth, geologic age, porosity and tectonic activity.

(194) PSU6B is a kind of unit that consists of seismic data acquisition unit and power supply unit in SN388 seismic data acquisition system.

(195) Chaotic seismic reflection configuration - is a discontinuous, discordant seismic reflection patterns.

(196) The extended ray tracing method can be applied to further researches on depth migration and seismic tomography for TI media.

(197) ARAM - ARIES is a new nel - link telemetry seismic data acquisition system.

(198) The characteristic analysis of stack velocity spectrum applied to seismic interpretation, especially to predicting oil and gas deposits is introduced in this paper.

(199) Ten small sized concrete block walls are tested under cyclic revers load, in order to investigate the functions of the inner columns and the axial load on the seismic behavior of these walls.

(200) According to the result, it is possible to make a mid or short term prediction of big earthquakes in the adjacent region of seismic source after huge earthquake occurs.

(201) The results show that it is feasible to use Lame constant inversion into 4D seismic monitoring.

(202) Anti - Seismic design for key projects is an important subject in engineering seismology.

(203) By using the data of seismic velocity spectrum, formation pressure may be predicted, which can direct the research work of drilling and other explorations.

(204) This is the manipulation or processing of the received seismic data.

(204) Sentencedict.com try its best to gather and make good sentences.

(205) The world's greatest earthquake belt, the circum-Pacific seismic belt, is found along the rim of the Pacific Ocean, where about 81 percent of the world's largest earthquakes occur.

(206) Using the gas zone seismic reflection character incorporated with drilled wells to predict its lateral distribution, we have obtained better predicting effects.

(207) Result indicates: Structural displacement response is largest as inputting Tianjin seismic waves, for its characteristic period is closed to the natural period of vibration of the model.

(208) As the common mid-point (CMP) stacking is hard to get a good effect in the complicated geological structure in seismic data processing, the common reflection point(CRP) stacking is used.

(209) Displacement-based seismic design of RC frames is based on the displacement shape of the RC frame, and multi-degree-of-freedom system is transformed into an effective single-degree-of-freedom system.

(210) On another hand, the seismic performance got from inelastic demand spectrum was increasingly popular because it avoids the complicated nonlinear time history analysis.