四元数

A ratio spectra derivative spectrophotometry for simultaneous determination of quaternary mixture of aminopyrine, phenobarbital, caffeine and phenacetin was studied.

提出了可应用于四元混合体系同时测定的比光谱-导数分光光度法，阐述了该方法的基本原理，并将其应用于氨基比林、苯巴比妥、咖啡因和非那西丁四元混合体系中各组分的同时测定。

With the experimental data, operation time of contour extraction of binary image represented by rectangle NAM is 0.31 to 0.86 times of that of image represented by matrix, operation time of Euler number computing of binary rectangle NAM image is 0.11 to 0.63 times of that of the pattern algorithm, operation time of connected component labeling of binary image represented by rectangle NAM is 0.08 to 0.37 times of that of image represented by matrix, 0.05 to 0.12 times of that of image represented by quadtree.

实验数据表明，采用矩形NAM表示的二值图像轮廓提取算法的执行时间是矩阵表示的0.31至0.86；矩形NAM表示的欧拉数计算执行时间是模板算法的0.11至0.63；矩形NAM表示的连通区域标记算法执行时间是矩阵表示的0.08至0.37，四元树表示的0.05至0.12。

Two-dimensional "different dollar" and "four-color conjecture"(5)- Mathematics - Mathematical Physics Mechanics World Health ...

二维的"相异元数"与"四色猜想"-数学-数学物理力学天地生。。。

After employing many axle bush experts, we not only successively developed the entire automobile stop-pushing bush, which obtains the National New Products Certification and the complete independent intellectual property right, but also successively developed the materials by burning and the complete independent intellectual property right, but also successively developed the materials by burning and combining copper and lead powder, with quick precise electroplated nickel layer, three electroplated elements,and the electroplating technology of tin layer.

公司承诺&以人为本，求真务&的发展理念，不懈追求上规模，上档次，上质量，先后引进多名轴瓦业高级工程师，研制开发了享有自由知识产权的整体式汽车止推瓦，获国家新产品证书；成功开发了铜铅粉末烧结合金材料，并配以快速精密电镀镍栅层、铅锡铜电镀三元及闪锡层电镀等新科技，最近研制开发出具有国际领先的轴瓦&四元&电镀技术，形成数条铜基、铅基轴瓦生产线。

The even-product of quaternions is also not widely used, but it mentioned due to the similarity between it and the odd product.

四元数偶积也不常用，但是它也会被提到，因为它和奇积的相似性。

Pairs of unit quaternions can represent a rotation in

单位四元数的对可以表示

In this example, Quaternions provides a better interpolation type when blending between the keyframe and motion path animation.

在这个例子中将展示，进行混合关键帧动画和移动路径动画时，四元数提供更好的内插种类。

The second argument that is commonly given for the use of quaternions is the possibility of smoothly interpolating between two orientations.

使用四元数的第二个理由，就是其可实现两个状态间的平滑插值。

SINS is calculated by quaternions and the in-tegrated navigation system is simulated by federated Kalman fil-tering method in this paper.

本文采用四元数法进行SINS计算，并运用联邦滤波的方法对组合导航进行了仿真。

What are quaternions?

什么是四元数？

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。