由導航 的英文怎麼說

中文拼音 [yóudǎoháng]
由導航 英文
under the pilotage of
  • 由 : causereason
  • 導 : 動詞1. （引導） lead; guide 2. （傳導） transmit; conduct 3. （開導） instruct; teach; give guidance to
  • 航 : Ⅰ名詞（船） boat; shipⅡ動詞（航行） navigate （by water or air）; sail
  1. With the development of airmanship, people aren ’ t satisfied with navigation systems that are based upon personal computer, because they are expensive and high - power. now, embedded navigators have been developed rapidly, but most of them are based on wince operation system, which increases the cost of navigation systems

    隨著導航技術的發展，基於pc機的導航定位系統由於其價格及功耗較高己不能滿足社會發展的需要，脫離pc端的嵌入式導航定位技術迅速發展起來，但這些嵌入式導航系統一般採用wince等商業操作系統，需交納使用費，增加了產品成本，造成產品價格居高不下。
  2. Radar and automatic pilots make maritime navigation less hazardous

    由於雷達和自動導航這些現代設備，航行變得安全多了。
  3. Other navigational keys are referred to by their specific names

    其他導航鍵由其特定的名稱表示。
  4. Gps receivers belong to the user equipment, mainly used to receive satellite signals and telegraphese, measure the distance from receiver to the satellites by the wireless signals, compute the position and speed of satellites by telegraphese, then compute the position and speed of user

    Gps衛星接收機屬于衛星導航定位系統中的用戶設備，主要用於接收衛星信號和電文，由無線電信號測定用戶至衛星的距離，或多普勒頻移等觀測量;根據導航電文，計算觀測衛星的位置和速度，根據觀測量和衛星的位置、速度，解算出用戶的位置和速度。
  5. 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。
  6. The first algorithm is low precise but simple and credible, the second is high precise but complex and incredible. 4 ) developed four kinds of methods aimed to improve precision and credibility of navigation system. the first is parallel sandia inertia terrain - aided navigation ( psitan ) ; the second is tercom + sitan, it can restrain two important disadvantages of sitan ; the third is particle filter - based terrain - aided navigation ( pftan ), the particle filter can reduce the error of navigation ; the last is tercom + pftan, where tercom is looked as monitor to ensure the credibility of navigation system

    採用并行sitan方法來提高導航精度，並克服奇異值問題；提出了tercom + sitan方法，綜合利用兩者的優點，在保持sitan導航精度的前提下，有效地克服了sitan的兩個缺點；提出了一種基於連續蒙特卡洛濾波（常被稱為particlefilter ）的地形匹配演算法（ pftan ） ，有效地克服了利用sitan時由於地形隨機線性化帶來的誤差，使導航精度有較大的提高；提出了tercom作為監視器的地形輔助導航思想，並將其應用到連續蒙特卡洛方法上，較大地增加了系統的可靠性和精度。
  7. To further facilitate the progress of the project, a hong kong cnsatm committee was set up in march 2000. chaired by cad, the committee comprises representatives from the international air transport association ( iata ), international federation of air line pilots associations ( ifalpa ), cpa, hong kong observatory and telecommunications services providers

    為進一步推展上述計劃，由民航處領導的香港衛星通訊、導航及監察系統航空交通管理系統委員會於二零零零年三月成立，其他成員來自國際民航運輸協會、國際航空公司飛行員協會、國泰航空公司、香港天文臺和電訊服務機構。
  8. In fact, most of the collision accidents are caused by the navigator ' s carelessness, fault and those operations violating the international regulations for preventing collision at sea

    咎其原因，不難發現絕大多數碰撞事故都是由於航海者的疏忽、過失以及嚴重違反海上避碰覿則所導致。
  9. Because of a navigational error, the anzacs came ashore about a mile north of the intended landing point

    1915年，澳紐軍團在土耳其愛琴海灣的加里波利登岸，但由於導航錯誤致使軍團在原定地點一英里以北登睦。
  10. Again, this is possible because sql uses set - level processing and db2 optimizes the query to determine the data - navigation logic

    同樣，由於sql使用集合級別的處理以及db2優化查詢來確定數據導航邏輯，所以這是可能的。
  11. So the drift error of gyro is always the main source of error in the control and navigation system, the study of technology of measurement and compensation plays more and more important part in this field

    由於陀螺的漂移誤差是整個控制和導航系統的重要誤差源，所以，對陀螺儀漂移的測試及補償技術的研究具有越來越重要的意義。
  12. The microwave landing system ( mls ) has higher performance and more advantages than the instrument landing system ( ils ), which will be adopted as the international standard landing system to replace ils in this year

    並且，由於微波著陸系統工作于微波段，還可以減小多徑效應。因此，和儀表著陸系統相比，微波著陸系統是一種性能比較優越的著陸導航系統。
  13. A brief survey on the state - of - the - art research of determining geographic location of ip addresses is presented. the problem of determining the geographic location of routers in internet service provider topology measurement is discussed when there is inadequate information such as domain names that could be used

    Ip地址定位技術在internet拓撲測量internet路由性質刻畫與地理位置相關的應用服務例如定向廣告web個性化搜索以及web地理空間導航geo - spatial navigating等方面具有重要作用。
  14. The simulation results show that the feature point detection and tracking algorithm is feasible. next, matched points based essential matrix estimation is studied. the spacecraft attitude and position parameters are derived from essential matrix and the scale of motion is recovered with range information from laser ranger taken in account

    再次，研究基於匹配特徵點對的本質矩陣的估計演算法，給出了由本質矩陣求取空間探測器的姿態信息和位置信息的方法，並且結合激光測距儀信息，得到探測器的運動比例參數，實現軟著陸過程的導航。
  15. The pilot homed in by means of radar, despite the poor visibility

    盡管能見度極差，飛機由雷達導航返航了。
  16. Resistance raged as the navigators charted the map of the corporation, and a pots - and - pans struggle in argentina created the take to occupy, create, and seize future from the bottom up

    其中，導航員描繪了大企業的航圖，亞根延的飯碗奮抗路線如何行進至一個由下而上的工人當家去回奪，開創以至掌握將來的標示。
  17. Abstract : the attitude error performance of electrostatic gyro should be understood and the relevant error equations must be set up in order to ensure the navigation precision of esgm. the relation between the navigation errors and the attitude errors of gyro was derived by use of spherical triangle. the simulation results show that the temporal performances of the longitudinal and distance errors which come from the initial alignment errors are periodically variational. they also show that the longitudinal and distance errors resulted from gyro drifts are not convergent in time. thus, the effects of initial alignment errors and gyro drifts can not be neglected and must be estimated and compensated

    文摘:為了保證靜電監控器的導航定位精度，需要了解靜電陀螺的姿態誤差特性，建立相應的誤差方程.本文採用球面三角形原理推導了導航定位誤差與陀螺姿態誤差的關系式.模擬結果表明，由初始定向誤差引起的經度誤差和距離誤差的時間特性是周期變化的；由陀螺漂移引起的經度誤差和距離誤差是隨時間發散的.因此，初始定向誤差和陀螺漂移的影響不能忽略，必須對其進行估計和補償
  18. Gps is a satellite positioning system that was developed by the united states army in the 1970 ' s

    Gps是本世紀70年代由美國陸海空三軍聯合研製的新一代空間衛星導航定位系統。
  19. At the beginning of design, the central controlling communicating tragedy was taken, navigation, localization, control, user communication, routing, routed and wireless resource management of whole network are all controlled by the network controller

    系統設計之初，採用集中控制的通信策略，全網的導航、定位、控制以及用戶間的通信都由網控節點進行路由和無線資源分配管理。
  20. A label for the node, often displayed by navigation controls

    節點的標簽，通常由導航控制項顯示。
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