The high homogeneity and isotropy shown in the cosmic microwave background ( cmb ) prove that the universe has been in existence for around 15 billion years 微波背景辐射显示的宇宙高度的均匀性和各向同性说明，宇宙已经存在了约150亿年左右。
Since the isotropy of such laminates holds only for the elastic properties , but not for the strength behavior , their strength largely depends on the stacking structure 在板内发生损伤之后，其各向同性性质不再保留，最终强度将依赖于加载方向以及叠层顺序。
Scattering of sh - wave by a radial collinear crack at the edge of arbitrary - shape - cavity in isotropy media is studied . the solution of dsif at crack tips is obtained 研究了各向同性介质中任意形孔边径向裂纹对sh波的散射，求解了裂纹尖端的动应力强度因子。
On the contrary , the fractal in space - time evolution in e + e - collisions turns out to be self - similar , which is due to the isotropy of qcd dynamics 另一方面，在e ~ + e ~ -对撞所产生的末态粒子阶乘矩的分布中呈现出各向同性，表明时空演化中的分形结构为自相似。
Furthermore , ga method also overcomes the shortcoming of the " isotropy " method that can be only used for laminate composed with one kind of material 另外应用遗传算法对由多种材料组成的层合板进行了零膨胀系数的设计，弥补了工程设计方法只能对由单一材料构成的层合板进行设计的不足。
It defines the 6 - axis f / t sensor ' s sensitivity and its sensitivity isotropy , and studies the influence on them when the coordinate system changing , and plots their atlases respectively 定义了六维力传感器的灵敏度和灵敏度各向同性指标，研究了坐标系的变化对两者产生的影响，并绘制了相应的图谱。
The stewart platform based 6 - axis f / t sensor ' s force and torque isotropy indices are studied , and the influence on these two indices when coordinate system changing is also studied in the thesis 对stewart平台六维力传感器的力和力矩各向同性指标进行了研究，并具体研究了坐标系的变化对该性能指标的影响。
For a given harmonic map . it is natural to ask that when the harmonic map is " - irreducible or " - irreducible , and when is isotropic ? if is non - isotropic , how to calaulate its isotropy order ? these are all the elementary topics for harmonic maps 如果它是非迷向的，又如何确定它的迷向阶?这些都是关于调和映照的基本问题。料的主要目的就是要解决这些问题。
By a hundred of years development , the study on slope stability has experienced such progression : from statistic to dynamic , confirming to unconfirming , double dimensions to three - dimension and from isotropy to anisotropy 经过近百年的发展，边坡的稳定性研究经历了一个由静态到动态、确定性到非确定性、二维到三维、均质各向同性到非均质各向异性的发展历程。
Considering all the factors of the force sensor together , such as isotropy indices , generalized amplifying coefficients , physical size and so on , a series of prior data is selected to be as configuration parameter 在综合考虑六维力传感器的各向同性指标、广义放大倍数指标以及传感器的整体外形尺寸等多方面因素的情况下，选出了一组较优的数据作为传感器的结构尺寸参数。
