查询词典 optically isotropic

To the problem that the isotropy and the technological efficiency of the parallel kinematic machine based on Stewart platform are not satisfactory, a novel architecture of 6-DOF 3-dimensional platform parallel kinematic machine (6-DOF 3-D PPKM) based on the 2-2-2-SPS 3-D PPR is presented. The technological efficiency of design of the parallel kinematic machine is analyzed. Its workspace and the effect of design parameters to the workspace volume are studied. By using the submatrices of Jacobian matrix and force Jacobian matrix, the kinematics/mechanics transmission isotropic indices, kinematics transmission indices, load-bearing capacity indices at any configuration of the parallel kinematic machine are proposed, respectively.

分析其结构和装配工艺性，研究其定位姿工作空间及机床结构参数对工作空间大小的影响，基于Jacobian矩阵和力Jacobian矩阵中同量纲元素构成的子阵，提出该并联机床在任意位姿的运动／力学传递各向同性评价指标、运动学传递能力评价指标和承载能力评价指标；基于柔度矩阵中同量纲元素构成的子阵，提出该并联机床在任意位姿的力-位置柔度评价指标、力-姿态柔度评价指标、力矩-姿态柔度评价指标和力矩-位置柔度评价指标；研究各性能指标在定位姿工作空间内的分布情况。

Based on the method of matrix transformation used in the compound material mechanics, the anisotropic flexibility matrix of the anisotropic sand with a certain stress state is transformed to be an isotopic one of a certain isotropic reference material with the corresponding stress state, and a corresponding stress matrix is obtained simultaneously.

借鉴复合材料力学中矩阵转换的数学方法，将各向异性砂样的柔度矩阵转化为各向同性等效参考砂的柔度矩阵，同时导出与其相当的应力状态的表达式，以使对各向异性岩土材料的分析可转换为对各向同性状态进行分析，由此可将以前基于各向同性假设的强度条件能够用于各向异性土体。

In isotropic medium the wave velocity of these two types of wave is identical; however, their vibration characteristics are different.

实验测试表明无偏振特性的扭转波在各向异性介质中传播时也会出现两种速度不同的扭转波，速度值与剪切横波的快慢横波速度值一致。

Analysis by the elastic-plastic finite element model, taking into account the non-linear geometry and Multilinear Isotropic Hardening material mode, adopting the pipe's strain-damage, have a different shape model to limit the impact load and the stress distribution of defects.

分析采用了弹塑性有限元模型，考虑了几何非线性和材料非线性，采用了多线性等效强化模型和管道破坏的应变准则，得到了不同形状模型对极限荷载的影响以及管壁缺陷处的应力分布状态。

The necking of the thin-walled cylinder specimens at different temperature have been studied for isotropic material using experimental and finite element methods.

采用试验和有限元相结合的方法对不同温度下薄壁圆筒拉伸试样的颈缩问题进行了研究。

Because of the effect of orientation orders on the distribution of the reactive group, which was called the " pseudo-concentration effect ",the concentration of the reactive group in the ordered domain was higher than that in the isotropic domain.

当体系中出现了介晶基元的有序排列时，与之相连的反应基团的分布也受到影响，有序区内的局部浓度将变大，产生假浓度效应，并最终影响扩散控制反应动力学。

In chapter 4, the effects of orientation of rough surfaces on the lubrication behaviors of frictional pairs operating in the isothermal condition were studied and found that: the conclusion that the hydrodynamic load carrying capacity of transversely oriented surface is better than the isotropic surfaces is tenable only if the minimum clearance is relatively large, but the longitudinally oriented surfaces always decrease the load carrying capacity..

第四章在等温条件下，计算了粗糙表面的纹理方向对摩擦副润滑性能的影响，发现横向纹理表面具有比各向同性表面更大流体动力承载能力只有当最小间隙较大时才能显示出来，而纵向纹理表面总是使得流体承载能力下降。

Almost all existed research works fasten on those transversely isotropic media with vertical or horizontal axis of symmetry., but rare are studies of orthotropy that is more common for rocks in sedimentary basin .

而在沉积盆地中较普遍存在着正交各向异性的情况。

By means of solid isotropic material with penalization model and perimeter control method, macro material layout and RVE are optimized.

结合SIMP材料模型和周长控制方法，实现了宏观结构和细观表征体胞的优化设计，获得清晰的材料分布。

By means of the model of solid isotropic material with penalization and the perimeter control method, the macro material layout and RVE are optimized.

结合SIMP材料模型和周长控制方法，实现了宏观结构和细观表征体胞的优化设计，获得清晰的材料分布。

These are places without aristocratic baggage; egalitarian places open to talent, self-improving, engaged in learning and innovation through networks that were at once competitive and cooperative.

这些地方没有贵族遗风作祟，而且对于那些有天分的人是开放的平等之地，这些人善于通过那些曾经很具有竞争力与合作精神的关系网进行自我提高以及学习创新。

Christine: You don't want to see me?

你不想见我？