The second method is using the bearing from the aircraft to the buoy , this report develops an algorithm which employs extended kalman filters to determine estimated position 方位测量定位法是在不同位置测得两个以上的方位面相交出一条定位线，由定位线与水平面的相交点实现二维平面定位。
Besides , when toa location method is applied , the relative position between the ms and the serving bs , the relationship between the location performance and the number of toa measurements are studied 论文还研究了采用toa定位法时， ms与服务bs相对位置、参与定位的toa测量值数目与定位性能的关系
Simulation under different environments shows that , if the accuracy of aoa measurement delivered by the . serving bs is relatively high , better performance can be obtained 通过在不同环境条件下对这两种算法的性能仿真，表明只要服务基站aoa测量值达到一定精度，采用这两种混合定位法就能取得更好的性能。
This article tends to introduce briefly the method of determining the orientation of regional development by synthesizing comprehensively the data from a central region 运用区域经济学和发展经济学的基本理论，结合经济地理学和经济增长阶段论的观点，以特定区域的定位分析为对象的纵横综合定位法，是区域定位的一种新尝试。
In image preprocessing of iris , two steps of coarse location and exact location is used to locate the center and radii of the inner and outer circle of iris , thus iris could be separated from the eye image 在虹膜图像预处理中,采用粗定位和精定位两步定位法来提取虹膜内外圆周的圆心和半径,从而把虹膜从眼睛中分离出来。
Based on this model , the principle of many kinds of localization methods is discussed , and measure equation is set up . then the performances and observability of different localization methods are analyzed 然后根据此模型,详细讨论了多种定位跟踪方法的原理,并分别建立观测方程,对各个定位法的性能进行分析比较,给出了可观测条件。
They are the two key points of passive localization technology , which decide the precision and rapidity . combining different localization measures and algorithms can bring in many kinds of localization methods 定位法和定位算法是无源定位技术的核心,它们决定着系统的定位精度和实时性,结合不同的定位法和定位算法,就能形成多种不同的定位跟踪方案。
It has been found that certain bats emit squeaks and by receiving the echoes , they can locate and steer clear of obstacles - - - - - - or locate flying insects on which they feed . this echo - location in bats is often compared with radar , the principle of which is similar 人们已经发现，某些蝙蝠发出尖叫声并靠接受回响来锁定和避免障碍物? ?或者找到它们赖以为生的昆虫。蝙蝠这种回响定位法常拿来和原理与之很相近似的雷达相比。
The paper is about satellite positioning and it ’ s related technology . it is divided into three subaspects , which are : doppler - range positioning algorithm and the rule to select satellite ; the constellation of a regional satellite navigation system ; gps interference technology 本文对卫星定位及相关技术作了较为深入的研究,内容分为三部分,分别是:多普勒和伪距联合定位法及其选星策略;区域定位的卫星星座; gps干扰技术。
To optimize capacitors placement in the distribution system for reducing power losses , the single capacitor compensation method is used to reduce the numbers of locations and to find the locations with best economic profits , meanwhile , the value of continuous variables is gained at the same time 对于电容器优化配置采用单电容补偿定位法，减小待补偿点的个数，将补偿限制在补偿效益最好的点上，同时得到补偿的连续量值。
