四元

This paper proposes a flexible and reliable camera calibration of stereo vision measurement system based on unit quaternions with optical reference bar, which has three small collinear infrared LED feature points and the lengths between these feature points have been precisely calibrated.

提出了一种利用光学参考棒，基于单位四元数法的灵活、有效的立体视觉测量系统现场校准技术。

Company in Beijing with Quaternion Bridge 4S stores, provide Istana commercial vehicle sales and service.

公司在北京四元桥设有4S店，提供伊思坦纳商务车销售和服务工作。

Keep in mind that, as is the case with matrices, quaternion multiplication is not commutative!

紧记，矩阵在此种情况下，四元数的乘法是不可进行交换的。

"We must fight for racial equality ," continued the speaker.

两个四元数相等的准则是，它们的数量部分相等。

A new structure theory of intelligent control .

智能控制的四元结构的研究。

This paper makes further research on the error,caused by use of a single step or a variable step of Runge Kutta to solve the Euler equation of quaternion method, find that the large error results from cumulated error with single step, and when using the variable step,the cumulative error is less.

结果表明，定步长时有很大的累积误差，单位四元数的"单位"性不能得到满足，而变步长有明显的改观，对一般的飞行模拟状态，都能得到较好的模拟结果，可以在实际中使用。

In this paper, decomposition of a quaternion matrix is systemically studied.

本文系统的研究了四元数矩阵分解理论。

Jerome's "Prologus Galeatus" and his prefaces to individual books; the capitula, or summaries of contents; and, in the first quaternion, certain materials which have been much discussed and have proved of the greatest service in tracing the history of the codex, among them dedicatory verses, a list of the books contained in the codex, a picture of the Tabernacle (formerly thought to be Solomon's Temple), a division of the Biblical books according to Jerome, another according to Hilary and Epiphanius, and a third according to Augustine.

除了文圣经的书籍，它包含了圣杰罗姆的" prologus galeatus "，而他的序跋，以个别书籍； capitula ，或摘要的内容，以及在第一次四元，某些材料，其中已有不少讨论，并已证明的最大的服务，追查历史上的法典，其中有奉献小诗，赠书书单载于法典，图片的帐幕的一个事业部，圣经书籍据杰罗姆，另据希拉里和epiphanius ，和第三条根据奥古斯丁。

Finally, carry on the effect of pour point depressant and viscosity reducer.

在此基础上合成三元共聚物AVM和四元共聚物ASMV。

For coplanar quadrilateral patterns,the initial values of iteration are given by coordinates of virtual image of the intersection point of two diagonal lines.

获得测距后即可应用四元数估算法确定相对姿态与相对位置。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。