四元的

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。

The equilibrium solubilities of the quaternary system EuCl3-CdCl2-HCl-H2O was determined at 25 ℃ and the corresponding equilibrium diagram was constructed.

测定了四元体系EuCl3-CdCl2-HCl-H2O(25℃)的相平衡溶度数据，绘制了相应的溶度图。

Simulation shows the algorithm validity and the attitude motion equation in error quaternion are effective to omnidirectional attitude control.

仿真表明了全角度算法的正确性，以及基于文中的四元数姿态误差方程可有效进行导弹全方位姿态控制。

Quaternions do not suffer from gimbal lock, because they do not express rotations relative to three separate axes.

四元数就不会遭受万向节锁的痛苦，因为它不用三个分离的轴表示旋转。

Based on a brief review on developments of number system, a new developed pattern is proposed. The quaternion is extended to a matrix form aI+bA+cB+dC, in which the identity matrix I and three special matrices A, B, C correspond to number 1 and three units of imaginary number i, j, k, respectively.

在数系发展的基础上，提出了一种新的发展模式：四元数推广为矩阵形式aI+bA+cB+dC，其中单位矩阵I和3个特殊矩阵A，B，C分别相应于数1和虚数单位i，j，k。

We know that examples of special Lagrangian submanifolds are very important for studying these submanifolds.

我们也采取相应的思想，得到一些四元数欧式空间中有关极小拉格朗日的伯恩斯坦型定理。

Vibration frequency modes of quasi-one-dimensional SiO2 clusters with one chain, two chain, three- and four- membered ring structures were calculated according to the density-functional theory.

运用密度泛函理论，计算了4～24个单元的准一维单链、双链、三元环、四元环管状构型SiO2团簇的振动频率。

The existence and forms of the generalized righteigenvalues of real nonsingular quaternion matrix were put forward.

给出了实四元数矩阵正则对的广义右特征值的存在性和表达形式。

The former is an iterative method, and quaternion was utilized to simplify the matrix orthogonalization procedure.

改进的单点估计算法是一种迭代算法，它计算简单，收敛速度快，同时由于采用四元数表示姿态矩阵，简化了矩阵的正交化过程。

This principle is to compile the use of recursive descent of DO-WHILE statement translation output four ...

这个是编译原理中的利用递归下降法对DO-WHILE语句进行翻译输出四元式的完整程序。

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。