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- If the norm is 1, you have a so-called unit quaternion (just as you would have a unit vector). 假如平均值为1，你就得到所谓的单位四元数（正象单位矢量）。
- Based on the unit quaternion decomposition of rotation matrix, this paper puts forward an algorithm to estimate motion parameters from the space position vectors of 3D feature points. 本文基于旋转矩阵单位四元数分解定理,提出一种由3D特征点空间位置估计运动参数的算法。
- First, according to the tracking error dynamics and kinematics described by unit quaternion error and angular velocity error, a sliding mode controller is derived based on Lyapunov theory. 首先根据由误差四元数和误差角速度描述的跟踪误差动力学和运动学方程，设计了基于李亚普诺夫方法的滑模变结构控制律。
- Only unit quaternions represent rotations, so normalize your quaternions if you have to. 唯一的是四元数需要表现旋转，因此你必须对现有的四元数进行归一化。
- Interpolation of Unit Quaternion Curve with High Order Continuity 高阶连续的单位四元数插值曲线
- Direct Solution of Absolute Orientation Based on Unit Quaternion 基于单位四元数的绝对定向直接解法
- Attitude Regulation of a Rigid Body Using Unit Quaternion 基于四元数的刚体姿态调节问题
- B. K. P. Horn,“Closed-form solution of absolute orientation using unit quaternions,”Optical Society of America, Vol.4, pp.629-642, April 1987. 陈信宏;“雷射探头整合于电脑控制四轴机台做小型元件之逆向工程量测;”国立台湾科技大学机械工程系;硕士论文;民国九十二年.
- Keywords photogrammetry spin matrix unit quaternion human upper-limb; 摄像测量;旋转矩阵;单位四元数;人体上肢;
- The luminous intensity on unit area. 单位面积上的发光强度。
- The family is the smallest social unit. 家庭是社会最小的单位。
- Pressure is force per unit area. 压力就是电单位面积上的力。
- A set of data elements which are handled as a unit. 作为一个单元来处理的一组数据元素。
- The family is the basic unit of society. 家庭是社会的基本单位。
- A metric unit of area equal to 10 ares. 十公亩面积的公制单位之一，等于十公亩。
- A metric unit of mass equal to 100 grams. 百克公制质量单位，等于100克。
- A unit of power equal to 1,000 watts. 千瓦功率的单位，等于1,000瓦。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Orientation-Singularity Analysis of 6-SPS Parallel Manipulator Using Unit Quaternion 基于四元数的6-SPS并联机器人姿态奇异研究
- A unit of currency in Chile, Panama, and Uruguay. 分智利、巴拿马和乌拉圭的货币单位
