1) quaternion division
四元素体
1.
Arithmetic distance and distance of skew-Hermitian matrices over quaternion division ring with an involution
具有对合的四元素体上斜Hermitian矩阵的距离与算术距离
2) Four element Doctrine
四元素说
1.
The former regarded the Four body Fluid Pathological Doctrine that develoed from the Four element Doctrine as its theoretical tool,the latter regarded the Five element Doctrine as its philosohical base.
西医以四元素说发展而来的四体液病理学说为其理论工具 ,中医以阳阳五行学说为其哲学基础。
4) quaternion
[英][kwə'tə:njən] [美][kwə'tɝnɪən]
四元素
1.
Using four non-coplanar reference points and a CCD camera, the simplified mathematical framework of relations between actual coordinates on the target spacecraft and measured image coordinates is developed by representing the relative parameters using unit quaternion.
利用四个非共面设置的特征光标和单个CCD相机,采用单位四元素来描述航天器相对姿态,基于比例正交投影近似假设,建立目标航天器已知特征光标物理坐标和对应图像点图像坐标之间的简化数学模型,以解析的形式给出了航天器间相对位姿参数(相对位置和姿态),并对解析解进行修正。
2.
The calculation of attitude matrix\'s quaternion differential eguations adopt four-order Range-Kuttle method commonly in strapdown inertial navigation system(SINS),Considered precision and speed,another effective method-four-order Taylor expansion is presented.
在捷联惯导系统中,姿态矩阵的四元素微分方程求解一般采用四阶龙格-库塔法,从运算精度与速度上考虑,提出了另一种有效的四阶泰勒展开法。
6) Quaternary system
四元体系
1.
Study on metastable phase equilibrium of quaternary system Li~+,K~+//CO_3~(2-),B_4O_7~(2-)-H_2O273K;
四元体系Li~+,K~+//CO_3~(2-),B_4O_7~(2-)-H_2O273K介稳相平衡研究
2.
The equilibrium solubilities and phase diagram of the quaternary system KVO3-NaVO3-CO(NH2)2-H2O at 298 K are studied by isothermal dissolution equilibrium method.
作者采用等温溶解平衡法研究了KVO3-NaVO3-CO(NH2)2-H2O四元体系298 K时的溶解度相关系,考察了钾、钠、脲素等共存离子或盐类同偏钒酸根离子的相互作用。
3.
The solubility of saturated solutions of quaternary system RbCl-CeCl3-HCl-H2O at 25 ℃ was determined and the corresponding equilibrium diagram was constructed.
测定了四元体系RbCl-CeCl3-HCl-H2O在25℃时的溶度数据,绘制了相应的溶度图。
补充资料：四元
1.指科举时代州县﹑府﹑省和廷试四级考试均名列第一。 2.数学名词。元朱世杰《四元玉鉴》以天﹑地﹑人﹑物代四个未知数。相当于现代代数的多元式。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条