各向异性

This thesis focuses on inverse problems of heat conduction in anisotropic materials which are of great importance in practice.

鉴于各向异性材料在实际应用中的重要性，本文考虑的是有关各向异性热传导方程的反问题。

For the anisotropism problem in the viscoplastic constitutive model, a four-step anisotropic tensor is generally used to describe it, but there are some difficulties to determine the tensor's components.

为此，本文引用传统塑性力学中各向异性当量屈服应力的概念，在现有Walker模型的基础上得到了一个更加便于工程应用的正交各向异性粘塑性损伤统一本构方程。

In addition,the degree of anisotropy of tensile strength is largest compared with that of other physical properties.

而且，实验结果也表明，抗压强度的各向异性程度比其他各种物性指标的各向异性程度都要大。

In addition, we also investigated polarization anisotropy and SKS wave spliting for comparison.

此外，我们还对面波的偏振各向异性作了探讨，用SKS波分裂方法作了各向异性的对比研究。

In this paper, this method is extended into the orthotropic media. The parameterβ=μxμy is introduced to perform coordinate transformation. The basic equations of antiplane crack problem for orthotropic media can be transformed in terms of those of isotropic media.

本文将这一方法推广应用于正交各向异性材料，首先引入参数β=μxμy，利用坐标变换，将正交各向异性板反平面裂纹问题的基本问题转换为各向同性的形式进行求解，然后经过反变换求得问题的一般解。

Since the atomic radius of cerium or yttrium is at the border between the Th〓Ni〓-type and the rhombohedral Th〓Zn〓type structure, the influence of different annealing temperatures on the crystal structure of Ce〓Co〓 and Y〓Co〓 compound was clarified.

测量并获得了这些化合物的晶体结构类型、点阵常数、晶胞体积、居里温度、在5K和300K时化合物的饱和磁化强度和每个Co原子的平均磁矩、各向异性场、各向异性常数、自旋重取向温度以及补偿温度等，并获得了相应化合物的磁相图。

The anisotropy of phase velocity, quality factor and attenuation were studied, and then, the effect of attenuation anisotropy of the cap rock on AVO analysis was investigated.

目前，对介质衰减各向异性性质的研究主要集中在均匀介质中，而衰减各向异性对反射地震数据的影响则较少考虑。

The velocities of ultrasonic wave and rock drillability are measured in perpendicular and parallel directions of the bedding plane of core samples which were cut from the approach hole of Chinese continental scientific drilling. Rock drillability index and P-wave velocity anisotropy coefficient are calculated from the testing data; and the results are discussed.

通过室内实验分别测定了岩芯垂直于和平行于地层层面方向的可钻性及声波速度，得到了岩石可钻性各向异性指数和波速各向异性系数，并对结果进行了讨论。

For example, in the design of antenna, it is always involve the imaginaries Bessel function, so these work are belonged to the base research work, but it is important.

本文对各向异性介质偶极天线辐射场的数值计算的研究以及各向异性介质波参数的数值计算的研究目前还没有文献系统介绍，但这些内容对进一步研究探地雷达辐射场的规律是必不可少的，尤其是传播常数，它在探地雷达的研究中仍然是一个非常重要的公式，对其的深入研究有利于对探地雷达资料的正确解释。

It results from the fact that the biquadratic coupling fieldand uniaxial anisotropy of the ferromagnetic counteract each other, so the oscillationsare weakend and the curves are smoothened.

这是由于双二次耦合体现的单轴各向异性与铁磁层单轴各向异性具有相反的符号，二者互相抵消，因此使振荡减弱，曲线变的光滑。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。