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弱横向
相关语句
  weak transversely
     P-WAVE TRAVEL TIME INVERSION AND VELOCITY ANALYSIS IN WEAK TRANSVERSELY ISOTROPIC MEDIA
     弱横向各向同性介质中P波旅行时反演及速度分析
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  “弱横向”译为未确定词的双语例句
     A plate bending element on the use of bubble functions (depending on Reissner- Mindlin Plate theory for assuming strain) is based on the Hu-Washizu function revised.
     基于修正的Hu-Washizu广义变分列式,使用泡沫函数构造不协调位移,引入消弱横向剪切应变能的约束,假设剪切应变沿厚度h二次分布,构造了具有克服薄板分析自锁的Reissner-Mindlin板弯曲单元。
短句来源
     The multi-reference velocity extrapolation operator can cope with severe lateral velocity variations and improve image accuracy. However, the calculation cost is large.
     单参考速度波场外推算子,适应地下介质弱横向变速,而多参考速度波场外推算子可以提高横向变速的适应能力和成像精度,但要以大量计算为代价。
短句来源
  相似匹配句对
     (weak)in width.
     宽()。
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     sorokiniana in different growing time of wheat.
     sorokiniana
短句来源
     STABILITY Of THE PERPENDICULAR MOVEMENT OF CHARGED PARTICLE IN INFIRM FOCUSING MAGNETIC FIELD
     聚焦磁场中带电粒子横向运动的稳定性
短句来源
     Ion acoustic solitary waves in a weakly relativistic plasma under transverse perturbations
     相对论等离子体横向扰动下的离子声孤波
短句来源
     Suppression of transverse stimulated Brillouin scattering
     横向受激布里渊散射的抑制
短句来源
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Generally speaking, wave equation forward modeling is closely related to wave equation migration except that no forward modeling corresponds to Stolt's f-k migration. It is found that severe superposed-frequency effect occurs in f-k forward seismic modeling. Hence,we put forward an improved forward formula and the corresponding calculation method that includes the following clever measures:(1)to remove the periodical influence of finite discrete Fourier transform by using amplitude attenuation factor,(2)to use...

Generally speaking, wave equation forward modeling is closely related to wave equation migration except that no forward modeling corresponds to Stolt's f-k migration. It is found that severe superposed-frequency effect occurs in f-k forward seismic modeling. Hence,we put forward an improved forward formula and the corresponding calculation method that includes the following clever measures:(1)to remove the periodical influence of finite discrete Fourier transform by using amplitude attenuation factor,(2)to use two Sine interpolations in interpolation mapping so as to eliminate false event noise for improved calculation efficiency,and(3)to adopt time-depth and depth-time conversions to make f-k forward modeling suitable for the case where there is weak lateral velocity variation besides vertical one. Experimental results show f-k forward seismic modeling is a practical method for wave equation forward modeling because it has some advantages similar to those in f-k wave equation migration,such as high efficiency,no restriction on formation dip angle,good stability and so on.

通常波动方程正演与波动方程偏移有密切的关系,唯有Stolt的f-k偏移没有相应的正演方法。经研究发现,f-k正演中存在严重的折返效应。为此,本文提出一种改进的正演公式及相应的算法:①利用振幅衰减因子克服有限离散傅氏变换的周期性影响;②在插值映射中使用两项Sinc插值,消除假同相轴的干扰和提高计算效率;③利用时—深和深—时变换方法使f-k域正演适用于垂向变速和弱横向变速的正演情况。试验结果表明,f-k域正演记录具有与f-k波动方程偏移相似的快速、高效、对地层倾角无限制、稳定性好等优点,是一种有实用价值的波动方程正演模拟方法。

The characteristics of flow around Y-shape prisms under various wind directions and its wind loading were studied by means of wind tunnel test. The results show that as the wind is along one leg of the model, the vibrations which are mainly caused by turbulence of oncoming flow are weak, and as the wind is along the angular bisector of two legs, the vibrations induced by vortex are strong. Increasing turbulence intensity in oncoming flow will cause both fluctuating lift and drag forces to increase significantly,...

The characteristics of flow around Y-shape prisms under various wind directions and its wind loading were studied by means of wind tunnel test. The results show that as the wind is along one leg of the model, the vibrations which are mainly caused by turbulence of oncoming flow are weak, and as the wind is along the angular bisector of two legs, the vibrations induced by vortex are strong. Increasing turbulence intensity in oncoming flow will cause both fluctuating lift and drag forces to increase significantly, whereas the vortex induced vibration will be somewhat restricted relatively.

通过风洞实验研究了二种典型尺寸的二维Y型柱体在不同风向角下的绕流特性及风荷载。实验结果表明:当风向顺Y型柱体某一肢时主要是来流脉动引起柱体较弱横向振动;当风向顺Y型柱体两肢分角线时则由涡脱落而引起柱体强烈的横向振动。来流湍流度的增加使脉动升力和阻力都大幅度增加,然而却使涡脱落引起的振动相对减弱。

A plate bending element on the use of bubble functions (depending on Reissner- Mindlin Plate theory for assuming strain) is based on the Hu-Washizu function revised.Examples of 4-node plate bendng strain hybird element show that the element presents a good numerical charaterastic.

基于修正的Hu-Washizu广义变分列式,使用泡沫函数构造不协调位移,引入消弱横向剪切应变能的约束,假设剪切应变沿厚度h二次分布,构造了具有克服薄板分析自锁的Reissner-Mindlin板弯曲单元。数值例证表明该单元具有良好的数值特性,适用于较宽的厚跨比,由C0问题解决了C1不连续的问题,并研究了单元不变性和单元的收敛性。弯曲率采用独立的不耦合假设解决了杂交单元分析列式考虑平衡而带来的求逆矩阵计算量大的问题。分析了零能。单元构造列式简单明了,节点自由度少,适于工程实际应用。

 
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