导航

To seek a new-style autonomous navigation method based on the characteristic of geomagnetic field.

利用地磁场的特性来寻找一种新型的自主导航方法。

The third chapter studies the process of dynamic simulation and assembly based upon geometric constraints and probability set. Improvements of the constraint recognition and confirmation, as well as movement navigation are proposed. Real time interference detection is implemented.

第三章研究了基于几何约束可能集合的动态仿真装配零件的过程，改进了约束识别、约束确认和运动导航的算法，实现了实时干涉检测。

Based on this method of dividing data into blocks in the horizontal and the multi-levels in the vertical direction, the modelling and representation of geometric and topological road data are set out in detail. As well, their support for the core functions of the navigation system is analyzed.

通过应用这种水平方向分块、垂直方向分层的方法，研究了几何道路数据和拓扑道路数据的建模与表达，并分析了它们对导航系统核心功能的支持。

In this step, the workpiece surface data such as the chamfering point P; the normal vector N; the feed vector F and the tool axis vector D are converted to the tool attitude data such as the tool axis vector D; the geometrical tool vector Tg and the functional tool vector Tf .

在这步，制件表面数据例如斜切的点P；正常传染媒介N；饲料传染媒介F和工具轴传染媒介D被转换成工具态度数据例如工具轴传染媒介D；几何工具传染媒介Tg和功能工具导航Tf。

This field is essential to navigation, communication, geophysical exploration and many others.

地壳磁场是地磁场的重要组成部分，对导航、通信、地球物理勘探等有重要意义。

Hamilton discovered the quaternion ,to the middle period of last century,the application of the quaternion and the quaternion matrix are discovered widely in geostatics,the theory of ped-top using, strap-down inertial ,naviation, enginery and organ,robot technology and artificial satellite attitude control,and so on.

R。 Hamilton发现四元数到上世纪中叶，四元数和四元数矩阵方法在刚体动力学、陀螺使用理论、捷联惯性导航、机器与机构、机器人技术、人造卫星姿态控制等领域应用非常广泛。

The navigation constellation composed of eight inclined globosity synchronous orbit satellites is designed.

设计了由八颗倾斜圆轨道地球同步卫星组成的导航星座。

GPS (Navigation Satellite Timing and Ranging Golbal Positioning System) is of properties for its high precision,quick speed for observations , cheapness and simplicity for its operation and so on. It s widely used many areas including surveying and mapping.

GPS(Navigation Timing and Ranging Global Positioning System)全球导航定位系统以其定位精度高、观测时间短、实施费用省、仪器操作简便等优良特性被广泛应用于测绘等众多领域。

For the first time, I had the opportunity to use a GPS Navigator.

这是我第一次有机会可以使用GPS导航仪。

I can't even find you on my GPS.

我在我个导航仪上找不到你

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。