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Principal axes method, was presented to figure out the rotational directions of talus and calcaneus and the angles between them.

采用最大类间方差法与交互式数学形态学方法相结合的手段从活体后足CT序列图像中分割出距骨和跟骨，以移动立方体法重建距下关节复合体的表面并以动画方式显示距骨和跟骨的结构信息，提出力矩主轴法计算距骨和跟骨相对于参考系的旋转方向及它们之间的夹角。

To improve the pointing accuracy of the telescope mount and the capability of daylight tracking, it is necessary to do more study on the error of telescope axes. The present thesis analyses many kinds of factors that cause the pointing error of telescope mount, and discusses the method for correcting the pointing error by setting up telescope mount model in detail.

本文详细分析了望远镜机架指向产生偏差的各种因素，讨论了通过建立望远镜机架指向误差模型的方法来修正望远镜机架指向误差的方法，通过使用CCD观测恒星来求解望远镜机架指向误差模型参数。

In this experiment we use a stationery system with two identical cameras with parallel axes to track a moving object in three dimensional space.

这个实验，我们用一种用平行轴固定的两台同步摄像机定位系统来跟踪一个三维空间中的移动物体。

Branchlets and inflorescence axes with arachnoid tomentum; leaflets abaxially with persistent rubiginous arachnoid tomentum.

有蛛丝状绒毛的小枝和花序轴；小叶背面具宿存的锈红色的蛛丝状绒毛。 37 V。 lanceolatifoliosa 鸡足葡萄

Also users can change parts of the parameters in the control software of topper computers to realize different control axes.

同样，用户也可以通过改变上位机控制软件的参数来实现对运动轴的选择。

When the resistive moment of surrounding soil is less than the torsional moment of eccentric jacking force, stability failure of pipeline occurs and pipes deviates from the designed axes.

管道失稳是由于管道周围土体提供的抵抗力矩小于偏心顶推力而产生的扭转力矩，造成管节偏离设计轴线。

Due to the electro-mechanical coupling, the subsynchronous oscillation occurs in the system,which causes the oscillation of electric current, electric voltage and the torsional oscillation of the set of axes.

网机系统机电耦联失稳振荡的分岔与混沌研究项目，共发表学术论文30篇（期刊论文23篇，会议论文7篇），其中SCI收录3篇，EI收录9篇，ISTP收录3篇，使我们的研究大大超额完成任务。

And then using mass center formula to calculate four parameters of translation axes and rotation coordinate, mathematic model is established.

然后采用重心公式计算出坐标平移旋转的4个参数，建立了坐标平移旋转的数学模型。

Based on the analysis of the affected extent of the neutral-point potential by every space vector on all kinds of voltage and current conditions the concept named neutral point control grade was proposed for the first time in this paper. The calculation formulas of NPCG were presented as well. Based on NPCG, a novel modulation scheme called optimized 3D space vector modulation (O3DSVM) scheme was proposed in a-b-0 coordinates based on the translation principle of axes, by which the space vectors with higher NPCG values are selected to synthesize the object vector to suppress the unbalance of the neutral-point potential.

该文通过对各种电流电压状态下每个三维空间矢量对直流中点电位的影响进行分析，提出了"中点控制度"(neutral-point control grades，NPCG)的概念，并给出了NPCG的计算公式；基于NPCG，在a-b-0坐标系下提出一种基于坐标平移原理的新型"三维矢量优化选择调制策略"(optimized 3D space vector modulation，O3DSVM)，该调制策略能优化选择NPCG值较高的矢量以合成目标矢量，从而达到最大程度控制直流中点电位偏移的目的。

Child growth and development in the eye, the eye grew from a small, axial length gradually increase, if the eyeball as a sphere, it has three axes, namely, longitudinal, transverse, sagittal axis, a sphere is the length of the three-axis equivalent.

儿童的眼睛在生长发育中，眼球由小长大，眼轴逐渐增长，如果将眼球看成一个球体，它有三个轴，即纵轴、横轴、矢状轴，一个正球体的三个轴的长度相等。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。