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wave impedance values
相关语句
  波阻抗值
     Generalized linear inversion is a common method in wave impedance inversion. The method brings high inversion accuracy; but it is very sensitive to noise, so that it will make wave impedance values distorted fully in severe case.
     广义线性反演是波阻抗反演中常用的一种方法,该方法反演精度高,但对噪声非常敏感,严重时可使反演出的波阻抗值完全失真。
短句来源
     The transverse and longitudinal wave velocities of the samples were accurately measured using ultrasonic pulse echo overlap method, so the characteristic wave impedance values of the samples were then obtained.
     采用高精度超声波脉冲回波重合方法,精确测量了超声波在样品中传播的横、纵波声速,并由此得到样品的特性波阻抗值
短句来源
  “wave impedance values”译为未确定词的双语例句
     Model parameters are thus a series of wave impedance values, so that multisolution phenomenon is reduced.
     这样,模型参数仅为一系列波阻抗参数,减少了反演的多解性。
短句来源
     The transverse and longitudinal wave velocities of the samples were accurately measured using the ultrasonic pulse echo overlap method, by which the characteristic wave impedance values of the samples were then obtained.
     采用高精度超声波脉冲回波重合法 ,精确测量了样品的横、纵波声速 ,并由此计算得到其特性波阻抗的实验值。
短句来源
  相似匹配句对
     Seismic wave imPedance
     地震波阻抗反演本身属于多参数的非线性化问题。
短句来源
     Approximate inversion of wave impedance
     波阻抗近似反演
短句来源
     On Wave Picture
     波的图像所反映出的一系列问题
短句来源
     Red Wave
     红色浪潮
短句来源
     impedance plethysmography
     阻抗式测容积法
短句来源
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Seismic lithologic modeling may be used to achieve thin layer inversion. It is realized by using generalized linear inversion. The article takes wave impedance as model parameter because reflections are related to the impedance interfaces of the model. In order to realize inversion of the thinnest layer, I use single layer model, which will be subdivided into equal small intervals we can distinquish. Model parameters are thus a series of wave impedance values, so that multisolution phenomenon is reduced....

Seismic lithologic modeling may be used to achieve thin layer inversion. It is realized by using generalized linear inversion. The article takes wave impedance as model parameter because reflections are related to the impedance interfaces of the model. In order to realize inversion of the thinnest layer, I use single layer model, which will be subdivided into equal small intervals we can distinquish. Model parameters are thus a series of wave impedance values, so that multisolution phenomenon is reduced. In the inversion, singular value decomposition is introduced to solve normal equation so as to obtain model parameter variables. Theoretical computation says this technique brings fast convergence and very accurate solution. Real data computation shows that the wave impedance curve obtained by the inversion is excellently consistent with the wave impedance curve derived from logging data. It is proved that this method results in better thin layer resolution.

地震岩性模拟可用于解决薄层反演问题。本文利用广义线性反演技术实现岩性模拟。由于反射波与模型的波阻抗界面有关,所以本文取波阻抗为模型参数。为了能反演出最小的薄层,初始模型取为一层,再进行等间隔细分层,细分层的间隔取我们所能分辨的薄层厚度。这样,模型参数仅为一系列波阻抗参数,减少了反演的多解性。反演中采用奇异值分解法(SVD)解正规方程,以便得到模型参数修改量。理论模型的试算表明,本方法收敛速度快,能得到非常精确的解。实际资料计算中,将反演得到的波阻抗曲线与测井得到的波阻抗曲线比较,具有很好的一致性。因而证实了该方法分辨薄层的能力较强。

Because of the recursion relation between wave impedance and reflection coefficient in seismic trace inversion based on convolution model, the inversionresult must be influenced by wave impedance recursion formula, particularly,the initial value of wave impedance. Different initial wave impedance values bring multisolution of inversion. Improper initial value will result in errors of low frequency component, relative wave impedance and stratum thickness to cause pitfalls of seismic data interpretation....

Because of the recursion relation between wave impedance and reflection coefficient in seismic trace inversion based on convolution model, the inversionresult must be influenced by wave impedance recursion formula, particularly,the initial value of wave impedance. Different initial wave impedance values bring multisolution of inversion. Improper initial value will result in errors of low frequency component, relative wave impedance and stratum thickness to cause pitfalls of seismic data interpretation. Certain influence due to initial de-viation is proved by some modeling computations of band-limited inversion,sparse pulse inversion and wide-band restrictive inversion. This article de-scribes a practical method for choosing correct initial value to reduce the influ-ence resulting from initial value deviation.

基于襟怀褶积模型的地震道反演中,由于存在波阻抗与反射系数的速推关系式,所以反演结果必定受到波阻抗逆推公式的影响,特别是要受到第一个波阻抗值即初值的影响。初位选择不同会出现反演的多解性;初值选择不当,会导致低频分量、相对波阻抗及岩层厚度的错误,产生地震解释的陷附。本文用带限反演、稀疏脉冲反演和宽带约束庆演方法模型试算,阐明了初值偏差的影响,并提出了实际反演中,选准初值以降低初估偏差影响的实用方法。

Generalized linear inversion is a common method in wave impedance inversion. The method brings high inversion accuracy; but it is very sensitive to noise, so that it will make wave impedance values distorted fully in severe case. Wavelet transform method has obvious frequency division property and noise elimination function. A new method for wave impedance inversion in wavelet domain is thus developed, which has joint advantages of the above two methods. The results of modeling computation...

Generalized linear inversion is a common method in wave impedance inversion. The method brings high inversion accuracy; but it is very sensitive to noise, so that it will make wave impedance values distorted fully in severe case. Wavelet transform method has obvious frequency division property and noise elimination function. A new method for wave impedance inversion in wavelet domain is thus developed, which has joint advantages of the above two methods. The results of modeling computation and real data processing show that the new method has right theory basis and brings good application effect.

广义线性反演是波阻抗反演中常用的一种方法,该方法反演精度高,但对噪声非常敏感,严重时可使反演出的波阻抗值完全失真。小波变换的方法具有十分明显的分频特性和去噪功能。本文采纳了广义线性反演和小波变换方法的优点,提出了小波域的波阻抗反演方法。通过理论模型试算和实际资料处理,结果表明,该方法在理论上是正确的,实际应用效果也是好的

 
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