As shown in the practical applications, the average relative error of high resolution acoustic slowness log predicted is 6.80%, the maximum average relative error is 24.8% at 1.631 km while the minimum average relative error is 0.06% at 1.629 km. Therefore,it has wide application perspective.
The Capital Digital Seismic Network,covering Beijing,Tianjin and central Hebei province,has recorded 1186 new earthquakes with M≥1.0 during May 2002 to Dec.2003,in which the arrival time differences between longitudinal wave and transverse wave are 2~25 s.
The multi-correlation of the time differences of press wave and shear wave, density and clay content and the correlation of dynamic parameters and static parameters were established in order to do preparation for conventional logging data being used in engineering.
receiver functions were provided from three component broadband seismograms recorded in the 18 stations in China and adjacent areas for the far earthquakes. The observed arrival time differences of P 410 S and P 660 S with P were obtained in these receiver functions.
The buried depths of 410km and 660km discontinuities under a station are acquired by the way of adjusting the depths of these two discontinuities in the velocity model until the theoretical arrival time differences of P 410 S and P 660 S with P well conformed to the observed.
At the same time multicomponent data acquisition may make the exploration of fracture oil reservoirs possible since it can reflect the major direction and density of the fracture development using the time differences between quick and slow shear waves which resulted from the shear wave splitting.
According to the working principle of compensation acoustic wave,the similar triangle principle is used to accurately calculate the arrival time of first wave of acoustic wave,the automatic baseline open door and the automatic threshold scope methods are used to enhance the antijamming ability to calculate first wave arrival time,thus guaranteeing slowness-time measuring accuracy of the compensation acoustic wave.
In dense target and false detection scenario of four time difference of arrival (TDOA) for multi-passive-sensor location system, the global optimal data association algorithm has to be adopted.
By using the database, cues relating to sound source localization, including interaural time difference (ITD), interaural level difference (ILD), and spectral features introduced by pinna, are analyzed.
The efficiency of the sinks, among which the formation of bivacancies seemingly dominates, is not high, which predetermines the slowness of relaxation processes in the solid-phase diffusion zone.
The integral with respect to the slowness is transformed to a contour integral in the complex slowness plane and then reduced to the integral over the edges of the cut of the vertical slowness function and the semiresidues at the poles.
One year following admission to school he received an oral vaccine against poliomyelitis and in the months thereafter he developed hyperkinesia, ataxia, and dystonia of limbs associated with extreme mental slowness.
Experimental data are presented for the cross-correlation coefficients and travel time differences of audible signals measured at distances of ～60 and ～120 km in an oceanic waveguide.
The small fluctuations of the travel time differences (≤0.43 ms for the "water" signals and ≤0.63 ms for the signals reflected from the sea surface) testify to their high stability.
The ability to detect the motion of an auditory target based on dynamic changes in interaural time differences was measured as a function of interaural correlation and acoustic spectrum in a single-interval forced-choice design.
The residual static correction plays a very important role in seismic data processing. Toobtain reasonable results,it is necessary to trace the correct reflection zones and to pick ac-curate time shifts between traces. A commonly used method is the correlation method.If the signal-to-noise ratio is relatively low, it is often necessary to choose one more reasonable re-sult from two completely different ones.A wrong choice may seriously distort the seismicprofile. This is the so-called multiple value prob...
ith five or nine points combination, a log curve of digital sonic integral transit time is handled by the method Of successive discrimination and interPOlation of distortion POints. According to the high-lower limites of sonic Speed of local area stratas, whether or not suddenly changes of the current and nearby POints are distinguished in the combination, and the unnormal points of interval transit time are deleted. After rejecting the distortion POint, the current distortion interval transit time POint is...
Well-logging is the most effetive way to check old-well hydrocarbon zone. In recent years, the oil fields in the cast part of China check the old-well hydrocarbon zone by using logging technology and exploit potentialies of hydrocarbon resource in fault block reservoir.the satisfactory result of increasing reserve and production has ben obtained. This paper demonstrates the examples of checking old-well hydrocarbon zone by well-logging in the east pert of China. Reader can draw lessons from these examples.
时差
time difference 
查询“时差”译词为其他词的双语例句
查询“时差”译词为用户自定义的双语例句
其他
相关查询:
2008 CNKI－中国知网