月球點 的英文怎麼說
中文拼音 [yuèqiúdiǎn]
月球點
英文
lunar point-
The determination of absolute altitudes on the moon meets with difficulties because of the lack of a definite zero reference.
月球上絕對高度的測定因為沒有一個固定的參照零點,頗有困難。Perhaps the outer part of the moon was heated to the melting point by intense meteoric bombardment.
也許月球外層曾被流星體猛烈的撞擊而加熱到熔點。The moon reaches its absolute perigee once a year.
月球每年有一次達到它的絕對近地點。When perigee and perihelion coincide tidal range is at its greatest.
當月球與地球到達它們的近地點和近日點的時間恰好重合時,就會引起最大的潮汐。It will meet the moon four days after its discharge, precisely at midnight on the 4th december, at the moment of its transit across the zenith.
它將在射出四天後,即十二月四日半夜整,與月球相遇並穿過其頂點。The implementation uses two - dimension images as input. the arrangement of light spots on the lunar rover and the imaging geometry of the camera are used to compute the three - dimension coordinates of the light spots in camera coordinate system, and after transformation, the world coordinate of the light points. we can then easily get the coordinate value of center of mass of the rover after averaging the world coordinate value of light points
本文構造了一種光點配置單目ccd演算法,它以計算機視覺系統採集的二維圖像信息作為輸入,直接利用光點的幾何配置條件和攝像機成像幾何關系,求解出光點在ccd攝像機坐標系下的三維坐標,並經過坐標變換,轉化為在世界坐標系下的坐標,然後取其平均值,從而得出月球車的中心位置。The angular size of the moon viewed from the earth is about 0. 5
從地球看來,月球的視直徑即月面最遠兩點的角距約為0 . 5度。This paper addressed three problems for a nonholonomic mobile robot. first, dynamics model of a six - wheeled rocker lunar rover is built. then based on this model the control strategies are proposed for trajectory tracking control and point stabilization
本文以非完整移動機器人為控制對象,針對六輪獨立驅動搖臂式月球車進行建模,分別對月球車的軌跡跟蹤問題以及輸入受約束的點鎮定問題進行了研究。However, the moon s path is tilted about 5 to the ecliptic, making the alignment of the sun, the earth and the moon in a straight line a relatively rare case. only when the sun and the moon are close enough to the nodes crossing points of the ecliptic and the moon s paths during full moon, a lunar eclipse can occur
要注意的是,由於太陽和月球在天空的軌道稱為黃道和白道並不在同一個平面上,而是有約5度的交角,所以只有太陽和月球分別位於黃道和白道的兩個交點附近,才有機會連成一條直線,產生月食。On the base of kinematics analysis and the relationship of adhesion coefficient of road surface and wheel slip. this paper give a simulation to a single wheel, to show the kinematics characteristics of the wheel in case of fixed torque and fixed wheel slip, and get a conclusion that wheel slip has great influence on kinematics characteristics of lunar rover
在動力學模型的基礎上,根據滑轉率和附著系數的關系,本文對月球車進行了動力學模擬,展示固定轉矩和固定滑轉率兩種情況下的動力學特點,得出了滑轉率影響到車輛驅動性能的結論。This partial eclipse is rather shallow with an umbral magnitude of only 0. 068, meaning that 6. 8 percent of the moon s diameter will enter into the umbra total shadow of the earth at the middle of eclipse
這次月偏食的食分較小,只有零點零六八,即是在食甚時,月球有百分之六點八的直徑進入地球本影。This partial eclipse is rather shallow with an umbral magnitude of only 0. 068, meaning that 6. 8 percent of the moon s diameter will enter into the umbra ( total shadow ) of the earth at the middle of eclipse
這次月偏食的食分較小,只有零點零六八,即是在食甚時,月球有百分之六點八的直徑進入地球本影。Of course, that doesn ' t mean that flying a battleship in the atmosphere of a planet will be safe either : you will have to be careful with your speed and the pressure of “ air ” on the hull, or the temperature ; you will have to carefully watch your fuel as the bottom thrusters will be continuously firing to maintain you in flight ; and if you disable the automatic compensation or have damaged thrusters, you might have to play “ lunar landing ” with your ship
當然,那並不說明在大氣層內用戰列艦也安全:你需要注意你的速度,以及空氣對船身的壓力,還有溫度;當底部推進器持續的點火來維持飛行,你將要小心的注意你的燃料;如果你的推進器損壞,而且解除自動推力補償系統,那麼你只有玩「月球登陸」了。To meet the demand of lunar vehicle, this paper focuses on the stereo matching and its use in the mobile robots navigation
本文結合月球車項目的背景需求,重點研究了立體匹配技術及其在移動機器人導航中的應用。Which after working this speed bag for a month and getting nowhere
.打了這個梨球一個月一點進展也沒有. . which after working this speed bag for a month and getting nowhere.
. . .打了這個梨球一個月一點進展也沒有. .In the stereo vision system of a lunar rover, the parameters of the cameras are fixed in the working and the requirement of precision is relatively low. therefore conventional calibration technique is selected after analyzing the merits and defects of various kinds of calibration methods
在月球車立體視覺中,由於攝像機的參數不經常變化,並且要求精度較高,因此本文通過分析各種攝像機標定方法的優缺點,將傳統的攝像機標定方法作為首選。The configuration of american six - wheel - rocker - bogie rover is studied. its virtual prototype is created, simulated and optimized using adams. the optimal parameters are obtained
基於此模型,分析六輪搖臂月球車的結構特點,在adams中建立典型的虛擬樣機模型,進行模擬分析和優化,得到優化參數。Crotts says this research might lead to optical imaging of the lunar surface that could monitor how, when and where gas escapes from the moon
克勞斯說,這項研究或許會有助於對月球表面氣體噴發現象發生的狀態,時間和地點進行光學描述。Having synthesized the advanced technology of navigation in the world and its own characteristics of the lunar rover, we adopted visual navigation systems as lunar - rover ’ s main work modes
綜合國際上導航的先進技術以及月球車的自身特點,本文採用了基於卡爾曼濾波的視覺導航系統作為主要的工作模式。分享友人