查询词典 inversion

The results of the interval velocities inversion in synthetic and real data are positive to the efficience of the inverse system presented in the thesis.

合成地震数据和实际地震数据的计算实例都表明，本文提出的层速度tomography反演的方法是行之有效的。

Calculating formula of wave impedance is obtained by main values of the inverse tangent function of phase_shift at two neighboring frequencies and the corresponding integral character of phase_shift is denoted as the convergent criterion of wave impedance inversion.

利用复合反射系数中多个频率点的相移反正切函数主值，给出了波阻抗的计算公式，并把套管-地层环空间介质中波的相移的整、实特性作为波阻抗反演收敛的判据。

Then we prove the isometrical identity and inversion formula of the solution of the wave equation.

然后，证明这个二阶波动方程的解具有反演公式及等距恒等式。

By singular value decomposition method, we obtain inversion formula of the generalized Radon transform with weight function, and study the support and range condition of it.

用奇异值分解的方法对带权的广义Radon变换的反演作了讨论，得到了反演公式并对其支集定理和值域条件进行了研究。

The method of FSSP is used to classify corrosion, a feature is extracted for the detection of corrosion, and an inversion mathematic formula to inversely evaluate the depth and volume is derived.

采用"频谱分离点"的方法对腐蚀缺陷进行了分类识别，提取了对腐蚀缺陷进行检测的特征量，得到了对腐蚀缺陷深度和体积进行反演计算的数学公式。

We can obtain the n-dimensional inversion reconstruction formula of the image convolution-back projection by one-dimensional wavelet transform on Radon transform.

在医学上，问题的一种重要方式是从多个X射线投影值获得人体内部的密度分布，这个过程被称为计算机断层扫描。

The simulated data show that the time-lapse seismic AVO inversion is feasible. The formula derived in this paper is effective for discriminating the variations of oil saturation and effective pressure and for improving the precision of time-lapse seismic interpretation.

试验结果表明，在S油田进行时移地震AVO反演是可行的，推导的时移地震AVO反演计算方法能有效地分离油藏含油饱和度和有效压力的变化，真正实现对油藏的定量解释。

The eigenvalues of circulant matrices compose of the discrete Fourier transform of the first line, on the contrary, the elements of the first line can recovered from the Fourier inversion formula, all circulant matrices have the same eigenvector that with the same order.

循环矩阵的特征值由其第一行元素的离散傅里叶变换组成，并且第一行元素是特征值的傅里叶变换的逆，而且所有同阶循环矩阵的特征向量相同。

By means of hydration experiment and immersing by actual drilling fluid in field, the inversion formula of previous acoustictime is setted up based on the acoustictime after hydration and hydration time.

通过实验室水化实验以及矿场实际钻井液浸泡规律建立了基于水化后声波时差和水化时间的原状声波时差反演公式。

Since any approximations, such as numerical Laplace inversion, backward differentiation formula, nonlinear model of switch, do not exist, the new algorithms are accurate.

由于该方法不存在任何极限近似问题（数值拉普拉斯反变换法，后向差分法，非线性开关模型法等），因而它是一种精确计算方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。