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Based on the description of three-COMERO operational principle and the direction cosine of geometric element, a thought that uses direction cosine to analyze reasons of oversize geometric tolerance is advanced and relevant example is showed, which can expand the way of analyzing quality and direct to produce an eligible machine part.

在描述三坐标测量机工作原理和几何元素方向余弦的基础上,提出了利用方向余弦进行形位公差超差原因分析的总体思路,并辅以实例,拓宽了产品质量分析手段,有助于指导制造出合格的机械零部件。

Several common description methods for rotational kinematics are discussed in control point, such as direction cosine matrix, Euler angles, quaternions and Rodrigues/Modified-Rodrigues parameters. Transformation relationships, advantages and disadvantages among those methods are discussed.

从控制角度综评方向余弦、欧拉角、四元数和Rodrigues/修正Rodrigues参数几种常用姿态描述动态方程,指出各种方法的优缺点,及相互转化。

Directive on the arm of the development of a detailed description.

对arm的开发指令做了详细的描述。

On the other hand, if the damage position and the damage size are used for description of the structural damage, the mathematical model is actually stated as a discrete structural optimization problem with unknown number of design variables, since the number of damages can not be given in advance.

本文采用极大极小问题构造损伤识别的优化模型,通过凝聚函数将极大极小问题转化为一个目标函数连续可微的无约束优化问题,采用基于灵敏度分析的序列线性规划方法求解。

The key point in this model is the description of the particle emissions from discrete levels to discrete levels in pre-equilibrium state.

在预平衡发射过程中关键在于描述从分立能级到分立能级的粒子发射。

The auxiliary technologies for hexahedral mesh generation are studied thoroughly in this article. The technologies mainly cover the parametric description of three-dimensional geometric solid boundary, the controlling of mesh precision by imposing maximum geometric discretization error, the topology analysis of mesh, the optimization of node labeling and the display of mesh with removed hidden lines.

对六面体网格生成的辅助技术进行了较深入的研究,其中主要讨论了三维空间几何实体边界的参数化描述、利用最大几何离散误差来控制网格的离散精度、在对网格的拓扑关系进行正确分析的基础上提出改进的节点编号优化算法以及快速的网格消影显示等技术。

A reasonable description of the latent heat is given by first introducing the discriminant function δ.

通过首次引入δ判别函数,给出一种合理的潜热描述。

Methods:The patient data of 63 cases (76 ears) in the hospital last five years were collected and treated with description statistical analysis as well as multiply discriminatory analysis with the aid of computer.

收集近 5 年突聋住院患者 63 例计 76 耳,将资料录入微机进行描述性统计分析和多类判别分析。

It makes empirical description of the insider trading in the follows : the effect of insider trading on the stock price , the abnormal return or disgorgement of insider traders , the impact of insider trading on the information asymmetry in trading .

本文首先以我国股票市场发生过内幕交易的股票为样本,分析了我国股票市场内幕交易的特征,从内幕交易对股票价格的影响,内幕交易者的超常收益,内幕交易对交易过程中信息不对称的影响等几个方面对内幕交易进行了实证分析。

American Tragedy" is the description of the "American Dream" and the pursuit of "American Dream disillusionment.

美国的悲剧》描写的正是对"美国梦"的追求以及"美国梦"的幻灭。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。