survey the terrain 中文意思是什麼
survey the terrain
解釋
察看地形-
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。 -
Gpr is a newly developed hi - tech survey technique used to detect shallow ground electric differences. we applied gpr to more than 100 projects in zhujiang river delta and hongkong, and obtained good reputations. the application scope involves stratigraphics division, outining of filled stones in the muddly beach, geotechnical prospecting of old wall, karst detecting in the limestone terrain, caving detecting, landslide and slop surveing, the division of wea - thering zone, onion weathering zone, fracture zone and fau - lted zone in the granite area, detecting of buried objects cable, metal nonmetal pipe, channel, air raid she - lter etc. underground in the urban city, archaeology, tracing of orebody, coal measures strata division, testing of the dam and grouting site, quality checking of the surface and foundation of the highway
的一種高新技術。我公司運用世界最先進的探地雷達設備在珠江三角洲地區和香港開展了百余項探地雷達檢測項目，獲得了良好的聲譽，並被作為深圳市建設局1998年度建設科技成果推廣項目。它主要應用於：山體土石方檢測路基不同回填物界面檢測填海回填物巖溶檢測樁基無損檢測地下管道探測地下隱蔽物探測考古斜坡滑體探測地質結構探測湖底探測高速公路路面及路基檢測。 -
Portable multiple beam sonar system is mainly used to survey the underwater terrain of huge reservoir. firstly, the thesis introduces the index of performance. secondly, it explains the ranging principle of sonar system, and simulates the processing procedure on computer, gives the beam pattern
本文首先介紹了地形聲吶的設計指標，然後敘述了多波束地形聲吶的測距原理，並對具體的實現過程進行了計算機模擬，給出了定向波束圖案。 -
Relying on the field survey and data analysis, this article compares the military fortresses and the village fortresses in seven facets, such as the constructing background and the distributing rules, the relation between the fortresses and the districts, the site and the terrain, and so on, trying to parse the deep meaning of the military fortresses and the village fortresses
以實地調研和資料分析為依託，從兩者的興築背景與分佈規律、堡與行政區劃的關系、選址與地形等七個方面進行比較，解析長城軍堡與村堡在物質表現形式與深層內涵上的異同。 -
It becomes possible that digital railway plan be used, which based on 3d terrain environment for the introduction of virtual reality and the wide application of digital photogrammetric survey
虛擬現實技術的引入和數字攝影測量技術的廣泛應用，使得基於三維虛擬地形環境的數字鐵路選線成為可能。 -
The multiple beam sonar system for terrain survey has met the system ' s requirement via the results of pool static experiments
通過水池的初步靜態實驗，我們研製的多波束地形探測聲納系統已經達到了了系統的設計要求。 -
It was a benefit try to apply underwater acoustic on underwater terrain survey for aerial sonar research and development center. it was also the purpose of this thesis
而將水聲技術應用於水下地形探測是航空聲吶研究發展中心在民用方面的一個有益嘗試，也是本文的研究意義所在。
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