波爾卡基亞 的英文怎麼說
中文拼音 [bōěrkǎjīyǎ]
波爾卡基亞
英文
porcacchia-
Capovilla was born in guayaquil in western ecuador on september 14, 1889, the same year that adolf hitler was born and the eiffel tower was inaugurated
卡波比亞1889年9月14日出生在厄瓜多西部的瓜亞基爾市，與希特勒出生和埃菲爾鐵塔竣工同年。Ecuadorean maria esther capovilla poses for a photo in guayaquil december 9. the 116 - year - old ecuadorean woman was declared by guinness world records as the oldest person in the world on december 9 ， 2005
12月9日，在厄瓜多港口城市瓜亞基爾， 116歲的瑪麗亞?埃絲特?卡波維拉安詳地坐在椅子上。當天，吉尼斯世界紀錄宣布瑪麗亞?埃絲特?卡波維拉為目前仍在世的年齡最大的人。In this paper, the main research works are as follows : 1 ) survey and analysis previous work in auv navigation and summarize : as the cumulate error, the dead - reckoning and inertial navigation systems ca n ' t be used without other modified system ; the acoustic navigation system is used only in small range, and is very expensive. 2 ) two important approaches in geophysical navigation techniques are summarized, one is terrain contour based navigation, this approach is investigated keystone today ; the other is image based navigation, due to no perfect image sensors and image seabed map, this approach has seldom been practised. 3 ) two important terrain contour based navigation algorithms has been applied to auv, one is match algorithm - based terrain contour match ( tercom ) ; the other is kalman filter - based sandia inertia terrain - aided navigation ( sitan )
主要研究內容包括：一、總結分析了當前水下導航的常用方法和不足之處，指出基於航位推算的導航方法，存在著最大的問題就是導航誤差的積累問題，如果沒有修正系統，這種方法很難滿足使用要求；其次指出基於聲學的導航方法，造價昂貴，導航范圍有限，難以滿足自主水下航行器大范圍導航的需求；二、總結了當前水下地形輔助導航的主要技術路線，一是基於地形高程的匹配方法，這是當前研究的重點；二是基於地形圖像的匹配方法，由於缺乏良好的圖像傳感器，和可用的海底圖像地圖，目前這種方法還有待研究發展；三、將兩種地形高程匹配的常用方法應用到自主水下航行器上：以相關演算法為前提的地形輪廓匹配（ tercom ）方法和以卡爾曼濾波為基礎的桑迪亞慣性地形輔助導航（ sitan ）方法，前者演算法簡單可靠，但是導航精度不高，後者雖然精度比較高，但存在著演算法較為復雜、有可能發散和出現奇異值等問題。
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