(1) Earthquakes produce two types of seismic waves.

(2) The fishermen said the company's seismic survey was frightening away fish.

(3) The scientists positioned the seismic activity as being along the San Andreas fault.

(4) I have never seen such a seismic shift in public opinion in such a short period of time.

(5) Both buildings need seismic upgrading and renovation.

(6) In seismic stations throughout the world, modern digital seismometers took their place.

(7) Compared to the slick colored maps of seismic tomography, these cartoons seem like country cousins.

(8) In fact, they are similar to the seismic waves from any other earthquake anywhere in the world.

(9) After 123 a of quiescence, noticeable seismic activity began on 20 March, 1980.

(10) Far from being randomly distributed, nearly all seismic activity is concentrated in relatively narrow zones.

(11) In seismic tomography, as the technique was called, researchers focused on the travel times of waves.

(12) The great dislocation and uprooting that this seismic shift entails have had at least two results.

(13) The seismic jolt to Los Angeles home values appears to have finally settled down, way down.

(14) Although listening devices and seismic instruments were put in place, efforts to pinpoint the source of the noise were unsuccessful.

(15) They were disappointed to find that the seismic snapshots were too blurry to support those kinds of mental leaps.

(16) Similarly burial plots at seismic locations have been constructed by the use of seismic stratigraphy and correlation with adjacent well positions.

(17) The news that the chairman would resign set off seismic waves in the business community.

(18) These records provided a rare opportunity to study the attenuation of strong seismic waves as a means of assessing seismic hazard.

(19) Plans for the three-year exploration phase include drilling three wells and seismic studies at a cost of $ 13 million.

(20) This was a rare opportunity to study the attenuation of strong seismic waves and thereby improve seismic hazard assessment.

(21) The density and elastic properties of rock are both important in affecting the passage of seismic waves.

(22) I bite into the succulent, still-warm-from-the-grill crustacean whose spice factor is near seismic.

(23) No one has ever imaged a hot-spot plume with seismic tomography.

(24) To do that, however, they must run a gantlet of seismic and magnetic sensors buried along the border.

(25) Similarly, mines can be fitted with various types of sensors, whether seismic, magnetic, acoustic or infrared.

(26) As they toured the country showing the fruits of seismic tomography, they fanned the flames of interest in this new technique.

(27) There have been several attempts to explain the reasons for the strong seismic reflections from such zones.

(28) They were submerged more than 1,000 years ago, probably by seismic activity.

(29) In 1984 a similar study was completed in U.K. Quadrant 53 based on a non-exclusive seismic survey.

(30) These stages are a result of the different batches of seismic waves that such a jolt releases.

(1) Earthquakes produce two types of seismic waves.

(2) The fishermen said the company's seismic survey was frightening away fish.

(31) Seismologists can also provide statistical estimates of the long-term seismic hazard.

(32) Seismic acquisition is likely to continue throughout 1992 and drilling activities are expected to recommence early in 1993.

(33) Looking in more detail, it is possible to classify seismic activity into four zones.

(34) Voters approved two bond measures to pay for the seismic retrofit, interior renovations and modernizing the electrical systems.

(35) Competing against time and against one an-other, they tweaked and massaged the raw seismic data with complex computer models.

(36) Also, the short scarps opposite the Caloris impact could be the result of seismic waves acting on such pre-existing faults.

(37) All the major gas discoveries were made between 1965 and 1967 using seismic data similar to that shown in Fig. 4.

(38) A Caltrans appeal would go to an ad hoc seismic retrofit permit review panel.

(39) How far such seismic social pressures come through to a child may be impossible to judge.

(40) The true state of affairs is unlikely to be clear until more and better quality deep seismic data become available.

(41) But the discovery of seismic activity suggests geological activity, which could provide large amounts of heat and minerals.

(42) Seismic tomography showed once and for all that the mantle was indeed in motion.

(43) Burial histories have been plotted at several well locations based on a stratigraphic interpretation of well and seismic data.

(44) If the seismic waves miss the plume, their record of it is lost to geophysicists.

(45) The vessel's reputation for excellent data acquisition was well matched by a significant upgrade in our seismic data processing capabilities.

(46) Churchill's best effects are achieved through the sudden injection of shock words which set off seismic disturbances.

(47) The findings could lead to improved seismic safety standards at nuclear plants.

(48) The Bari lands are also threatened by coal mining, and national oil company Maraven has begun seismic tests in the area.

(49) Areas underlain by soft sediments are particularly vulnerable during earthquakes, as the seismic waves can shake the ground more easily.

(50) A major seismic programme was undertaken during 1992 and this work will continue through 1993.

(51) The seismic waves from deeper earthquakes lose much of their energy by the time they reach the surface.

(52) Like light, seismic waves can reflect and refract off a surface.

(53) An initial seismic survey will be completed in 1993 with exploration drilling scheduled to begin early in 1994.

(54) Officials said there was no immediate threat of tsunami, a seismic ocean wave, which could be catastrophic to the area./seismic.html

(55) Some studies showed the seismic waves that passed through it speeding up; others showed them slowing down.

(56) A team of seismic engineers was bought in with equipment normally used in oil exploration to identify unusual objects buried underground.

(57) Spectrum analysis of seismic exploration program.

(58) a seismic shift in the political process.

(59) Detecting fractures by extracting seismic azimuthal anisotropy.

(60) Seismic signals are stored digitally in binary code.

(61) FS Reflexion works with a seismic vibration system.

(62) Airgun is an important active seismic source.

(63) The Eurasian seismic belt still remained in quiescence.

(64) A high - speed seismic data network composed of 700 information nodes has been built.

(65) Practical tests show seismic data can be timely, safely and reliably transmitted to seismic data processing center by using this technique.

(66) Finally, the seismic reliability analysis of Shenyang main gas supply network is performed using the minimal cut based recursive decomposition algorithm.

(67) Using the method of receiver function the S - wave velocity structure under Gansu seismic network is studied.

(68) Particularly, the calculation method of seismic design force and the seismic reduction factor R in Taiwan's code are introduced and explained in details.

(69) Dynamic loading is produced by seismic forces, non - steady wind, blast, reciprocating machinery.

(70) The theory of optimized array filtering is advanced to cope with the multi-channel seismic data which include effective wave and coherent noise.

(71) Seismic risk models are especially useful to develop isoseismal maps in areas where the earthquake data are only partially available.

(72) The Y - eccentrically braced steel frame has excellent seismic resistance and energy - dissipation.

(73) The Tunguska event included seismic waves and infrasonic disturbances that were recorded around the world.

(74) The determination of structure has historically been the fundamental objective of seismic work.

(75) Absorptive boundary condition for absorbing man-made boundary reflection must be required in the numerical modeling of seismic wave.

(76) Attenuation of seismic waves between such surfaces can be similarly diagnostic.

(77) Channel wave seismic detection technique is an ideal method for detecting minor structures in heading stope.

(78) In the method, the mean velocity of certain exploration depth can be calculated making use of the difference of phase from consecutive seismic channels.

(79) Seismic data collected by the CWB ( Central Weather Bureau ) are also included.

(80) Not all kinds of gangue dams can use the pseudo-static method to analyse their seismic stability or great departure may result.

(81) In the seismic survey, random noises with a wide frequency band can strongly influence the ratio of signal to noise.

(82) The seismic assessment and strengthening renovation for the teaching building, office building of Beijing University, completed by IEE.

(83) The effect of explosive characteristic on the amplitude of explosion seismic wave is studied by means of comparing experiments on ground motion caused by FAE and TNT located near the ground.

(84) Mapping a fracture network using wide - azimuth OBC seismic data.

(85) Normal stress influences obviously on seismic shearing behavior in earthquake response.

(86) The meaning of singularity of seismic trace is sketched here. A circulative iteration algorithm of deconvolution and singularity analysis is used to achieve wavelet separation.

(87) Yannan buried hill has been studied and predicted by use of various seismic measures,[http:///seismic.html] previous geological understanding and drilling data of wells in adjacent area.

(88) Wave impedance inversion is essential in predicting reservoir properties and sand-body distribution, and plays an important role in seismic survey.

(89) Then the seismic fortification criteria for the Maglev Guideway Structures is proposed.

(90) In this paper, a direct displacement-based seismic design procedure is implemented and demonstrated through an example to fulfill multiple performance objectives in practical design.

(91) The seismic method of geophysical exploration is the most frequently used method in petroleum exploration.

(92) The NWW and NNW trending seismic zones are controlled respectively by deep crust faulting and the neotectonic faults.

(93) This article deals with the numerical simulation technology of seismic wave based upon elastic wave equation with high-order, staggered-grid finite difference technology.

(94) In order to increase drilling success ratio, the thickness and reservoir of Carboniferous were predicted through model forward by use of the seismic data in combination with synthetic seismogram.

(95) Further research is required on " Intermittent criticality ", " triggers, stress shadows and implications for seismic hazard ".

(96) At present, the vertical incidence of seismic wave is considered in the seismic response analysis of arch dam.

(97) Vertical resolution of reflection seismic record is better to horizontal resolution as opposed to other geophysical methods.

(98) SAC is tool software widely used in seismology research. SAC format also becomes general format of seismic waveform.

(99) The location results of near earthquakes using the waveform data from Panzhihua Seismic Station are compared with that of Telemetered Seismic Network and that of seismic stations nearby.

(100) Earthquake insurance, as an efficient economic method through compensating and apportioning seismic hazard, has very positive function during anti-seismic and reducing hazard program.

(101) In the paper, inversion methods of Lame constant are introduced and used actually in the inversion of 4D seismic monitoring data.

(102) The two-stage method for base isolation structure is put forward based on Code for Seismic Design of Buildings (GB50011-2001).

(103) Noise has always been the most troublesome problem in seismic prospecting.

(104) For that reason, the paper presented geologic target-oriented and forward simulation-based seismic acquisition designing method.

(105) A study of the propagation nature of the seismic wave shows that the wave equation migration method currently used incurs a neglectness of the influence of phase characteristic.

(106) Supercomputing problems that could benefit from more data storage include weather forecasts, seismic processing in the petroleum industry, and molecular studies of genomes or proteins, says Conway.

(107) According to seismic reflection structure, it can be divided into 3 types: slope, plat form and depressed area, including 16 seismic facies.

(108) Using this method, we researched a synthetic discrimination method of nuclear test seismic monitoring with fuzzy logic illation, and listed its theory framework.

(109) In dynamic analysis of complicated structure, critical angle of seismic wave is corresponding to critical response of structure.

(110) Based on the analysis of some seismic test method, a new tentative idea about "Hybrid Test" is proposed.

(111) The analysis of the crustal movement tendency since 1991 have some significance for the judging stress state and large seismic situation in the area.

(112) In geophysics, reflection refers to the seismic energy or signal that returns from an interface of contrasting acoustic impedance, known as a reflector, according to Snell's law.

(113) The research on the joints of rabbet has great significance to the lateral stability of timber frame and Seismic Performance of Chinese history timber structure.

(114) Finally, the seismic data after noise elimination are transformed into time domain again by using S-inverse transformation to achieve the effective signals needed.

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(115) The fourth, the paper studies the seismic muti-attribute's depressed dimension mapping method based on K-L transform and its optimizing forecast strategy based on BP neural network.

(116) This techniqueneeds manual correlation to find out the same seismic horizons for programing.

(117) Similarly, the more stretched tight seismic wind resistance is also the worse.

(118) On the basis of summing up more than 20 years' development of deep reflected seismic technology, the paper presented and completed X2 distribution technique of deep reflected seismic data.

(119) Based on the study the seismic design recommendations of grillage walls are presented.

(120) This method reaped quite good geological effect in the seismic interpretation of thin sand bed in Pucheng area.

(121) The area's seismic prospecting characteristics have tantivy attenuation of seismic waves, strong interference waves, low signal-noise ratio and difficult operational conditions.

(122) All of the foregoing material shows that seismic instrument specifications may be less stringent.

(123) By using the seismic source model of crack containing hyperpressure gas, the course of radioactive heat energy in the earth to accumulate in the focal area and cause for earthquake are studied.

(124) Recalculation and interpretation of the available explosive seismic sounding data in the Tuotuohe-Golmud area has resulted in a two-dimentional velocity structural model and distribution of Q values.

(125) The calculation formulas to effective damping ratio suitable for two kinds of seismic reduction considerations, as well as displacement based calculation formulas are studied.

(126) Along with the urban rapid development, the engineering seismic survey's importance also can unceasingly promote.

(127) This result can offer reference for seismic risk analysis and structural aseismic checking computation.

(128) The paper introduces the constructional and seismic energy dissipation of combined lead rubber dampers.

(129) We intend to reprocess several seismic profiles running across this out-of-sequence thrust in the hope to reveal changes in structural style of the fault as it evolves from aseismic to seismogenic.

(130) The digital field monitor plotter is an important part of seismic acquisition system, and it is one of important means to monitor, process field seismic data and control record quality in time.

(131) In the premise of ensuring the accuracy of seismic wavelet, reduced the model order as much as possible so as to obtain high-efficiency and high-precision seismic wavelet model order determination.

(132) Seismic attribute from seismic data series of characteristic parameters reflecting reservoir body and oil - gas bearing proper - ties .

(133) The elastic wave parameters characteristics of Datong jurassic coal rock bed are analyzed. It will guide the channel wave seismic exploration in future.

(134) circum-Pacific seismic belt, the Mediterranean - Asia earthquake zone is the world's largest two seismic zone.

(135) The importance of seismic design of nonstructural components and equipment in buildings has grown increasingly in China.

(136) Diffractions appear as hyperbolic or umbrella-shaped events on a seismic profile.

(137) It not only use for seismic design of BRBCF but also provides references for seismic retrofit of homogeneous structure.

(138) The dynamical analysis of quadrangular pyramid grid structure modality and seismic response is made by ANSYS.

(139) Further, it gives us some armour against our colleagues, the seismic interpreters.

(140) This technique imposes no chance on the main seismic instruments or detectors.

(141) Based on the above-defined evaluation criteria, the evaluation is carried out for the effects of earthquake dominant frequency ratio (EDFR) on the seismic control performance of the ATMD.

(142) Seismic inversion problems must be solved by non linear global optimization methods.

(143) The western part of Hua-Bei Basin is one of the oil and gas region in China. Seismic exploration has played an important role in the disco- very of various oil and gas traps.

(144) The relative side lobe of sweeping signal is an important factor impacting the seismic data quality acquired by vibrator.

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(145) There are many problems in the ethnic regions of western Sichuan Province, such as seismic active zone, serious water and soil erosion, fragile eco-environment, low level of economy, etc.

(146) Sedimentary system and distribution features of early Tertiary in Liaohe tidal zone are studied by using seismic stratigraphy , sequence stratigraphy , and logging sedimentology.

(147) The dynamic loading resulting from blast, gusts of wind, or seismic forces is generally not harmonic.

(148) The effectiveness of the hybrid control system is discussed based on the seismic dynamic time history response of some specific structures.

(149) First reflection waveform characteristic parameters that exhibit lithologic variation are determined by defining geological characters of seismic horizon with the aid of waveform analysis.

(150) Seismic impedance inversion throve from the 70s of 20 century, and change conventional seismic data into lithology data, which provide important information for oil-gas prospecting.

(151) A method is presented for use in establishing probability model of seismic intensity attenuation in regions with abundant data of isoseismal maps.

(152) Numerical analyses of seismic behavior have been completed on a steel frame structure with a T-shaped core plate frictional damper by applying ANSYS in Tianjin city in the present paper.

(153) The key of AVO processing is to keep amplitude feature to obtain high fidelity seismic section.

(154) In the paper , we have introduced the acquisition and processing method of three component seismic survey.

(155) Experimental research and analysis of the seismic behavior of reinforced concrete eccentricbeam-column joints with eccentricity larger than one-fourth of the column width are introduced.

(156) But to layered strata, the seismic wave path is complicated when reservoir changes, and it is difficult to directly define vertical time difference by pre stack far offset seismic data.

(157) The phase problem is one of the important factors that effect seismic reflective signal stack in same phase.

(158) In original seismic data, surface wave interference often conceals the effective signal and reduces the S/N ratio of data.

(159) In Jiyang depression, the locations of exploration well given by3D seismic allow useful-life possible about 5years.

(160) The difficulties of multi-component seismic data processing are converted wave dissymmetrical ray path and anisotropy.

(161) In order to spread this technique, I have made trial VSP modeling during shothole drilling: shallow seismic velocity survey during shothole drilling.

(162) The vertical pendulum tiltmeter in Karamay seismic station was transformed digitally with EDAS-3 16 digit data acquisition unit and MDS-2710 data radio.

(163) Simultaneously, the assessment is also carried out for the effects of earthquake dominant frequency ratio (EDFR) on the seismic control performance of the passive tuned mass damper (PTMD).

(164) The formation of the seismic landslide is complex and factors influencing the seismic landslide are multitudinous.

(165) The seismic analysis is carried out by step-by-step method in the time domain with inputting the three-dimensional earthquake ground motion for a K8 type cable-supported lattice shell.

(166) The seismic gap, belt distribution and frequency variation before this event are discussed in this paper, serving as a useful means of monitoring future activities in the area.

(167) The model DSQ water tube tiltmeter is a digital seismic precursory instrument developed in the 9th 5-year-plan.

(168) Fast Fourier Translation and FRF of impulse function are applied to research the transverse seismic response of shield tunnel, with step-by-step integral procedure being compared.

(169) One method used in a geophysical exploration is called seismic method.

(170) For the processing of seismic data with low signal-to-noise ratio, it is important to eliminate the coherent and random noises.

(171) Migration of the seismic activity is found before a big event.

(172) Wavelet transform involves the two-variate function of frequency and time, which makes it convenient to simultaneously compensate for attenuation of seismic energy in frequency and time domains.

(173) To raise vertical resolution, reservoir feature reconstruction is an effective method and seismic attribution interpretation is also very important.

(174) By means of the full-scale model on the shaking table for simulation earthquake action, the researches have been on the anti seismic ability of stone curtain wall connected by anchors.

(175) A formula is derived for calculating the lateral seismic response of 1-storied industrial building with a gable wall at one end under the action of travelling waves.

(176) Zero drift in main amplifier is one of the important factors which affects the stability and accuracy of the digital seismic data acquisition system.

(177) Many uncertain factors are involved in seismic performance evaluation and the probabilistic results drawn from inadequate information are suspectable .

(178) The technology of observing production performance by using micro - seismic method in swept region is concerned worldwide.

(179) The other is to make quantitive description of reservoir and recognition of reservoir fluids by using the series of seismic and its combination with petrophysics.

(180) In seismic data, it is often associated with bottom simulating reflectors ( BSR ) and blanking zone.

(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.

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(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.

(211) On the basis of expounding the basic principle using 2-D wavelet transform for seismic attributes data, the paper built up the effective flow used for multi-scale edge detection of image.

(212) The gas range of Bao - 1 block is also predicted by using the seismic pattern recognition.

(213) This paper illustrates good prospective to seek gas hydrate in the Continental Slope and Okinawa Trough in the East China Sea, according to the research of 2D seismic profiles surveyed by our bureau.

(214) An automatic seismic signal detector based on a fast algorithm of energy spectrum has been developed for digital accelerograph.

(215) Evacuation is an important the study of seismic emergency and succor.

(216) Limited by the seismic scale resolution, how to forecast the distribution of reservoir by rule and line is a pivotal condition of the strong reservoir heterogeneity carbonate exploration activity.

(217) In this paper, field seismic wave fields were simulated with seismic physical modeling technique.

(218) The coherent noise is main obstacle for improving S/N ratio, correctly conducting the velocity analysis and migration in 3D seismic exploration of complex areas.

(219) The curvature effect of wave rays in vertically and horizontally-nonuniform medium must be considered in making joint tomography of interborehole seismic data and inverse VSP data.

(220) The authors generalized the basic rules for isochronic correlation by using seismic reflection profile in the SZ36-1 oil field.

(221) There is a certain functional relation between seismic interval velocity and formation porosity asas residual porosity.

(222) The maximum seismic force ratio of the shell reaches 0.22.

(223) Surface-related multiple(SRM) is a coherent noise with strong energy especially in marine seismic data.

(224) It is shown by the tests that, under seismic action, the soft soil presents a gradually increasing residual settlement(), while the cohesionless soil shows an abrupt settlement.

(225) This paper describes the reservoir distribution in wells and predicts 3-D reservoir distribution of Archaeozoic reservoir in the Chengbei-30 burried hill with 3-D seismic inversion.

(226) In this paper, the damper control is applied to the horizontal seismic responses of multistorey buildings, and the theoretical analysis and experimental research are performed.

(227) In the experiments, the acceleration and displacement reaction of the wooden structure houses were obtained by the role of transmitting several different peaks of the seismic waves to it.

(228) The structure modeling achieves the intercalibration process of fault-point data and individual layer data derived from seismic interpretation and drilling.

(229) The experiments on artificial synthetic seismogram and actual seismic records show that this method is of practical use in proper accuracy range.

(230) Some changes in reservoir lithology and physical properties usually reflect in seismic wave form characteristics.

(231) Through seismic wave analysis it is inferred that the Hualian quake was probably caused by double offsets in the seismic source.

(232) As the results of eustatic changes, the deep-water sedimentary systems with unique seismic face architecture were developed in the low-stand stages corresponding to the third order sequence.

(233) Numerical value show: circular-ring energy dissipater can control seismic response and uplift.

(234) Three-dimension accelerometer, which is composed of a seismic mass, push-pull cylinders and Michelson interferometer with double light paths, has been designed.

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(235) We can imagine a seismic detector being bombarded by myriads of grains of sand.

(236) Study of a number of small seismic swarms also gives us the preliminary understanding that the attenuation rate of seismic coda waves of swarms does not change considerably.

(237) The tomographic inversion of seismic data is better shown in the Talimu Basin and it revealed obvious lateral velocity variation in shallow levels.

(238) This paper provides an example of the application of seismic S-wave reflection method and S-wave velocity to engineering investigation.

(239) By directly measuring the acoustic velocity of each formation encountered in a well, the well logs and borehole seismic data can be correlated to surface seismic data more easily.

(240) According to shallow seismic survey results the boreholes are placed on the fractured zone of a fault and the required quality and quantity of water are obtained.

(241) Reasonable ground treatment scheme selection will direct affect treatment purpose and project schedule when constructing large coal yard on soft and liquefiable ground in a highly seismic area.

(242) This paper reviewed the results concerning the precise measurement of seismic velocity variation and application, discussed the principle and application of the correlated detection.

(243) The results show that the methods developed in this paper are reliable, which can reasonably simulate the seismic collapse process of reinforced concrete frame structures with shear type deformation.

(244) Large—scale seismic belts andnetworks in the crustal seismogenic layer is a response to plastic—flow network in the lower lithosphere.

(245) In this thesis, based on the status of stratum, explaining and analyzing many pieces of seismic cross section plane, and getting structural styles and structural pattern of working area.

(246) Two-step approximate formula of seismic velocity in sand and shale formation is given on the basis of core analysis. logging data interpretation and wave velocity mechanism analysis.

(247) It is pointed out that we shall give full consideration to the millisecond delay detonator′s error, design method and checking computation method on seismic wave.

(248) To improve the function of plotter can make seismic acquisition quality up to a new level.

(249) While performing the seismic modelling experiment, it needs to have tens to hundreds of kilohertz and well-distributed orientation-dependent narrow pulse acoustic wave as simulation source.

(250) A seismic trace calculated from well - log data is called a synthetic seismogram.

(251) Starting off seismic convolution model, the author expatiate on the conception and design way of deconvolution.

(252) It is then pointed out that both major charge and minor shot hole which is plugged at top for good coupling should be used in high resolution seismic exploration.

(253) Channel capacity, which is the largest channel number to receive seismic data, is an important indicator of the hardware performance of seismic instruments.

(254) The seismic reflection signatures of gas hydrate-bearing strata are defined and the lithologic parameter closely related with gas hydrate, i. e. acoustic velocity, is identified.

(255) Vietnam alleges that Chinese boats cut a cable from a seismic survey boat off its coast in late May and impeded another last week, while China accuses Vietnam of illegally entering its waters.

(256) Beginning with an analysis of the complex wave fields in the seismic model experiment, this paper tries to provide some theoretical bases for the seismic method in metallic ore exploration.

(257) The paper studied the issue of low frequency in shallow parts of cross-hole seismic reflection sections using imaging principle and deduced frequency variation factor.

(258) The seismic methods, reflection and refraction, are currently used in mining exploration.

(259) The viscoelasticity of a medium makes seismic wave have a constant phase delay when u...

(260) The inversion of seismic wavefield based on elastic wave equations is an interesting issue for seismology.

(261) The discovery of abnormal pre - seismic phenomena, a great leap in perceptual knowledge.

(262) Seismic location by P wave is realized by means of locating program of single phase when a larger shock occurred in or near the seismic station network and S wave was limited signal .

(263) High - resolution seismic method is an indispensably method of detecting active fault in city.

(264) The third part is about the anisotropy analysis of apparent resistivity at seismic stations.

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(265) Some contents in the paper have reference value for frequency shaping circuit in seismic data system.

(266) Field experimental seismic sounding permitted us to obtain optimal shallow seismic reflection sounding parameters.

(267) According to the modern seismic conception, the critical zone of the RC member can be in the state of inelastic deformation after yield under strong motion.

(268) The field profile observation, indoor geological profile analysis, seismic profile analysis and the fission-track dating were used to study the formation age of dustpan fault depression.

(269) D prestack depth migration is an ideal seismic data imaging technique for the area where there occur very complicated geologic structure and severe lateral velocity variation.

(270) Numerical tests using the SEG-EAGE salt model suggest that this method is useful for confirming the special seismic acquisition geometry layout for target-oriented imaging.

(271) Rock wool is used a variety of natural ore made of inorganic fiber, has excellent fire, sound insulation, heat insulation, water repellency seismic characteristics.

(272) The seismic amplifier of ARA type is a integrated amplifier which can be shifted automatically.

(273) The seismic subduction zones have shown signs of rapid movement recently.

(274) The thesis mainly discussed the realization with software and hardware of the seismic signals detecting and target identifying microsystem.

(275) The stress distribution of gangboard is analyzed briefly to get stress distribution law under seismic action.

(276) The over - all seismic behavior of D - type Eccentrically Braced Frames is studied by the method.

(277) From the analysis of time-varying filtering characteristic oof stratums[/seismic.html], a multiscale model of seismic Wavelet is presented.

(278) Seismic callosity ground each fresh life put an end to at Acheron , how many family to destroy?

(279) The extract of seismic wavelet is the base of wave impedance inversion and forward modeling.

(280) The latest seismic activity was also felt in northern Kenya.