[数]方向余弦

direction cosines───[数]方向余弦

direction finding───[测][雷达]测向；[测]定向

direction angle───[数]方向角；坐标方位角

direction finder───[航][水运]探向器；方位仪

direction finders───[航][水运]探向器；方位仪

directional microphone───[电子]定向传声器

direct cost───n.[会计]直接成本

Thetheory includes Euler angular algorithm, direction cosine algorithm, quaternion algorithm and rotation vector algorithm.───基本理论包括欧拉角算法 、 方向余弦算法 、 四元数算法和等效旋转矢量算法.

kinematics model by post D-H method for 4R-robot was offered in this paper, which derived the manipulator finger position and its attitude with unit vectors of direction cosine.───H后置法建立了4R机器人运动方程，建立机器人执行机构在空间相对位置关系的数学模型，由此可解出手部位置和用单位矢量方向余弦表示的姿态。

This paper presents a new method named "Analytic Orthogonalization", for orthogonalizing direction cosine matrix.───本文提出方向余弦矩阵正交化的一种新方法——解析正交化。

coordinate transformation matrix based on the direction cosine parameters from the object coordinate system to the world coordinate system is derived by vector algebra.───矢量代数的方法，推导出以方向余弦为参量的物坐标系到世界坐标系的坐标变换矩阵；利用矩阵求逆的方法，推导出世界坐标系到物坐标系的坐标变换矩阵。

In this case the rotation tensor R is equal to the direction, cosine L. Example 10.

This paper presents a new method named "Analytic Orthogonalization", for orthogonalizing direction cosine matrix.

Thetheory includes Euler angular algorithm, direction cosine algorithm, quaternion algorithm and rotation vector algorithm.

Methods of spherical trigonometry and direction cosine matrix were applied respectively to derive the bracket error, and the two methods had the same error formula and the same calculation results.

A kinematics model by post D-H method for 4R-robot was offered in this paper, which derived the manipulator finger position and its attitude with unit vectors of direction cosine.

Introduce the principium and method of Euler angle algorithm, direction cosine algorithm, Quaternion algorithm, and Rotation Vector algorithm.

The coordinate transformation matrix based on the direction cosine parameters from the object coordinate system to the world coordinate system is derived by vector algebra.