| 1. | The bar directions are conveniently specified by direction cosines .
杆的方向通常用方向余弦来表示。 |
| 2. | 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。 |
| 3. | We simply introduce the application of quaternion numbers in inertial measurement , research the calculation of direction cosine array and introduce equal rotating vector to analyze cone error
介绍了四元数法在惯性测量中的应用,研究了方向余弦矩阵的计算方法,并引入等效旋转矢量对圆锥误差进行了分析。 |
| 4. | 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。 |
| 5. | 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。 |
| 6. | 2 . 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。 |
| 7. | In the latter , that is in two - position alignment , the method of wavelet analysis is used to filter the output signal of optic fiber optic gyro , at last , the direction cosine matrix is gotten , the inertial components are demarcated ,
在自对准中，利用二位置初始对准，运用小波分析对光纤陀螺的输出信号进行滤波，并且确定初始方向余弦矩阵并对惯性元件进行标定。 |
| 8. | This direction finding algorithm may resolve uncorrelated monochromatic sources , but it assumes that all signal frequencies are distinct . it requires no a priori knowledge of the signals " frequencies , suffers no frequency - doa ambiguity , and pairs automatically the x - axis direction cosines with the y - axis direction cosines
该算法用单矢量水听器，在无需知道信号先验信息的条件下，可以实现对多个不相关信号的方位角估计，并且不受频率模糊度的影响，自动匹配x轴、 y轴的方向余弦。 |
