矢的

Equations and boundary conditions for tilt angle and twist angle of director are obtained with variation theory.

通过变分理论得到指向矢倾角和扭曲角满足的方程和边界条件。

Tilt angle and twist angle of director with applied voltage at certain δ/λ are calculated with finite-difference iterative method.

根据这些方程和边界条件，利用差分迭代方法计算出指向矢倾角和扭曲角对应某一个δ/λ值在不同电压下的分布。

METHODS: Analysis of the pelvis in the sagittal plane is commonly assessed by 3 angular measurements: the pelvic incidence (morphologic parameter directly linked to sagittal morphotypes), the pelvic tilt (or pelvis retroversion used to maintain an upright posture in the setting of spinal deformity), and the sacral slope.

矢状面骨盆的分析一般包括3个角度的测量：骨盆下陷度(与矢状面形态直接相关的形态学参数)，骨盆倾斜度(脊柱畸形时为维持直立姿势骨盆的后倾角度)，及骶骨斜度。

Both approximate and calculated results of fundamental wave and second harmonic wave for intensity variation with phase aberrated coefficient have been presented. It is applicable to designs of harmonic generation for high power lasers.

第三部分：把准晶态结构引入到非线性光学介质中，得到所谓的超晶格，当这种超晶格的倒格矢与光波矢可以相比拟时，光波在其内的传播将与传统情况有很大的不同。

The need for a precise and reproducible planning tool for the correction of sagittal imbalance prompted us to apply a simple trigonometric equation to achiee the desired sagittal alignment of the spine.

目的：矫正矢状面的畸形需要一种精确的、可重复性的方法，这促使我们运用一种三角函数的计算方法来达到脊柱理想的矢状面序列矫正。

Spondylolysis were showed in sagittal images. Conclusion: The scan range were increased for the fourth lumbar to first sacroiliac interverteral disc and contained vertebral arch for conventional intervertebral disc. The spiral scanning were performed for lumbar spondyloschisis and with MPR along the direction of vertebral arch. The method is simple and useful for the patients suffered low-back pain.

对常规椎间盘扫描采用对L(下标 4~5)及L5~S1，椎间盘加大扫描范围，包括椎弓根层面的方法，对于轴位扫描发现或可疑峡部裂的患者再做相应椎体螺旋扫描，行平行于峡部的椎弓长轴多平面斜矢状面和矢状面重建，是腰腿痛病人CT检查的简单、实用的有效方法。

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

采用基于边界构形的内缩法，实现了三维畸变网格的重新划分；提出了初矢修正法对触模节点的位置进行修正，解决了由于离散的模具网格的法矢不连续造成的&死锁&问题；采用准静态迭代法简化了速度场和温度场耦合计算过程；特别是针对减速因子β的选取，建立了适用于三维复杂成形过程刚粘塑性罚函数法有限元三次因子法的计算公式，并结合进退搜索法提出了改进的三次因子快速算法，提高了模拟计算效率和稳定性，在此基础之上，开发了面向叶片精锻过程的三维刚粘塑性热力耦合有限元模拟分析系统(3D-CTM)，系统的可靠性得到了圆柱体镦粗的验证。

Shoulder angle in sagittal view was increase sustained, but elbow angle in sagittal view was from increase to decrease in second pull phase of snatch. This result indicated that the upper arm was leaving forward the trunk, and the movement of elbow was from extention to flexion, in second pull phase of snatch.

肩关节矢状面角度在发力过程中持续增加时，肘关节矢状面角度则是先增加而后减少，这意谓著参与者的上臂在发力的过程中是有向前逐渐偏离躯干的情况产生，并且肘部的动作是先伸展而后屈曲。

The odontoid vertebra space in the model was divided into lattices and the stress area of the odontoid vertebra was identified by force loading and analyses. It was found that the structure of the stress concentration area was closely related to the development of split sections. Therefore,when the odontoid process is attacked by the external force along its vertical plane,its waist is likely to break and type II fracture occurs. And the break also possibly appears in its base,in this way,type HI fracture occurs.

确定其材料性质、单元类型并控制好网格划分精度后，通过力的加载与分析，找出枢椎的结构应力区，根据结构的应力集中区与其断裂时断裂面走向的密切关系，从而判断出当外部载荷沿齿突中性矢状面不同角度作用，即齿突受到来自其矢状面的外部冲击时，容易在齿突腰部发生断裂，形成枢椎齿突Ⅱ型骨折，也可能在基底部发生断裂，形成枢椎齿突Ⅲ型骨折。

The wave propagation and refraction of type "O" irregularities in the counter-electrojet conditions is investigated with a model electrojet in terms of the linear theory of the electrojet instability.

本文分析了反向赤道电射流条件下的不均匀性的对流放大特性。根据电射流不稳定性的线性理论，对一个分层均匀的电射流的模式的数值计算表明：在反向电射流条件下，电射流不均匀性有如下的特性：在波的传播过程中，在上电射流区内，波矢向下旋转，在下电射流区内，波矢向上旋转；在驱动电场E_D数值相同的情况下，反向电射流条件下的射线路径积分增长率r比正常电射流情况的要小得多。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。