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 方位測量定位法是在不同位置測得兩個(gè)以上的方位面相交出一條定位線,由定位線與水平面的相交點(diǎn)實(shí)現(xiàn)二維平面定位。
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 論文還研究了采用toa定位法時(shí), ms與服務(wù)bs相對(duì)位置、參與定位的toa測量值數(shù)目與定位性能的關(guān)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 通過在不同環(huán)境條件下對(duì)這兩種算法的性能仿真,表明只要服務(wù)基站aoa測量值達(dá)到一定精度,采用這兩種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 運(yùn)用區(qū)域經(jīng)濟(jì)學(xué)和發(fā)展經(jīng)濟(jì)學(xué)的基本理論,結(jié)合經(jīng)濟(jì)地理學(xué)和經(jīng)濟(jì)增長階段論的觀點(diǎn),以特定區(qū)域的定位分析為對(duì)象的縱橫綜合定位法,是區(qū)域定位的一種新嘗試。
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 在虹膜圖像預(yù)處理中,采用粗定位和精定位兩步定位法來提取虹膜內(nèi)外圓周的圓心和半徑,從而把虹膜從眼睛中分離出來。
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 然后根據(jù)此模型,詳細(xì)討論了多種定位跟蹤方法的原理,并分別建立觀測方程,對(duì)各個(gè)定位法的性能進(jìn)行分析比較,給出了可觀測條件。
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無源定位技術(shù)的核心,它們決定著系統(tǒng)的定位精度和實(shí)時(shí)性,結(jié)合不同的定位法和定位算法,就能形成多種不同的定位跟蹤方案。
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 人們已經(jīng)發(fā)現(xiàn),某些蝙蝠發(fā)出尖叫聲并靠接受回響來鎖定和避免障礙物? ?或者找到它們賴以為生的昆蟲。蝙蝠這種回響定位法常拿來和原理與之很相近似的雷達(dá)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 本文對(duì)衛(wèi)星定位及相關(guān)技術(shù)作了較為深入的研究,內(nèi)容分為三部分,分別是:多普勒和偽距聯(lián)合定位法及其選星策略;區(qū)域定位的衛(wèi)星星座; gps干擾技術(shù)。
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 對(duì)于電容器優(yōu)化配置采用單電容補(bǔ)償定位法,減小待補(bǔ)償點(diǎn)的個(gè)數(shù),將補(bǔ)償限制在補(bǔ)償效益最好的點(diǎn)上,同時(shí)得到補(bǔ)償?shù)倪B續(xù)量值。