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- The angle displacement of tested body is confirmed with the method of direction cosine, the mathematical model of angle displacement is established. 以方向余弦法来确定被测体的角位移，建立其角位移数学模型。
- The quaternion is extracted from the direction cosine matrix;it"s a simple way of optimizing initial extraction of the quaternion. 通过最佳归一化处理，避免了姿态角方向余弦矩阵正交规范化计算，优化了四元数初始提取算法。
- 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. 采用D-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。
- The sub-bands are coded and the information of direction cosine is used for iris matching, by means of which this method overcomes zoom, shift and illuminance and obtains approving effect. 将分解后子带作为特征编码，利用空间向量的方向夹角余弦作为匹配方法，有效克服了缩放、平移、光照等影响，达到了较好的识别效果。
- The bar directions are conveniently specified by direction cosines. 杆的方向通常用方向余弦来表示。
- The updating algorithm of Strapdown matrix is one of the crucial techniques of SINS. There are several kinds of attitude updating algorithms of SINS,such as direction cosine algorithm and quaternion algorithm. 捷联矩阵更新算法是捷联系统的关键技术之一，捷联惯导系统姿态算法有欧拉角法、方向余弦法、四元数法和圆锥补偿算法等几种方法。
- The kinematical equations for the direction cosine parameters and for the Cay-ley-Klein parameters are derived by means of the isomorphic relation between the several kinds of parameters. 本文通过对四元数矩阵求导的方法,首先推得四元数参数的运动学方程,再依据几种参数间的同构关系,即很方便地直接得到了方向余弦和凯里-克莱茵参数的运动学方程。
- By the analysing method of direction cosine matrix ,we set up motion analysing model of spherical gear and fluted disc of this gear, thus provide the theoretical basis for control system design of actuating mechanism. 利用方向余弦矩阵分析法建立了球齿轮机构和球齿轮齿盘机构的运动分析模型，为执行机构的控制系统设计提供了理论依据。
- The so called indirect integral operation means that Eular angles can be gotten from the direction cosine matrix which is received by the integral operation of quaternions or direction cosine. 飞行器导航中,姿态角的获取可以通过直接或间接的积分运算求得的,所谓间接获取即是指通过四元数或方向余弦的积分运算求得姿态矩阵,再从姿态矩阵中提取姿态角。
- The pressure hydrophone array manifold can be divided into two subarray manifolds, which constitute a rotation pair, and the rotational invariant factors comprise the source's direction cosine. 其中声压水听器阵可以被划分为2个子阵，它们构成旋转对，旋转因子为包含某一轴方向余弦信息的相位延迟因子。
- She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。
- I'll book you on a direct flight to London. 我将为你预订直飞伦敦的航班。
- He has chosen the most direct route. 他选取了最直的路线。
- She's very direct, believes in speaking her mind. 她为人直率，喜欢有什么说什么。
- Can you direct me to the shoe department? 请告诉我卖鞋部在哪里。
- Be there a direct train for Beijing to Nanning? 从北京到南宁有直达车吗？
- It has excellent estimation precision, pairs automatically the x-axis direction cosines with the y-axis direction cosines and suffers no DOA ambiguity. 具有较好的估计精度，能实现方向余弦的自动配对，不造成波达方向的模糊性。
- See that direct heat does not play on it. 当心别让它直接受热。
- It's a long way by road the train is more direct. 走公路很远--乘火车近。
- Would you please direct me to the zoo? 请问去动物园怎么走?
