moving a single point 中文意思是什麼
moving a single point
解釋
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Motivated by this observation, this paper studies the problem of efficiently processing k nn k - ge 1 search on r - tree - like structures storing historical information about moving object trajectories. two algorithms are developed based on best - first traversal paradigm, called bfp k nn and bft k nn, which handle the k nn retrieval with respect to the static query point and the moving query trajectory, respectively. both algorithms minimize the number of node access, that is, they perform a single access only to those qualifying nodes that may contain the final result
例如，若已知動物的軌跡，則動物學家可能提出如下兩種查詢： i在時間區間ti ， tj內找到離一個給定的靜態點譬如食物源實驗室等最近的k條動物軌跡ii在時間區間ti ， tj內找到離一條預先指定的動物軌跡最近的k條動物軌跡。 -
When it arrives at the predetermined destination, the robot controls multi - putting - ball mechanisms and puts the game - ball into the drum simultaneously. on the other side, on the basis of the theory and experiment, we subjoin a line - tracking device in the robot system, ensuring the correct moving of the robot along the white index line on the venue, in order to increase the accuracy of orientation. during the automatic moving, the robot measures the position on the venue by itself, moreover, judging its direction and automatic cut - away with the single - chip microcomputer. this system has been finished the experiment, and find credibility, be in point
同時，為了保證機器人正確地沿著比賽場地上的指示線行走，提高機器人定位的準確性，還從理論和實驗的角度，在機器人上增加了一套尋線系統，以便機器人在其自動行走的過程中，隨時檢測自身的位置狀態，判斷偏離方向，進行自動的糾正。這一套尋線系統已完成了實驗，且比較可靠、適用。 -
In this paper, the concepts, the historical background, the importance and current application of scientific computing and visualization of scientific computing are introduced and the visualization of computational detonation mechanics is specially expounded. based on the sumarization of the visualization software visc2d and visc3d directing at the mmic ( multi _ material in cell ), the key point of the improvement and the research contents are listed. based on the basic visualization reference model and the data file format of mmic, the file format of vector data is defined. the 2 - d data field visualization technology is described in detail. include the visualization of scalar field and vector field. the weak points of the visc2d software is overcome, and we propose the full - frame coloring mapping method and the visualization of the vector data using the clic ( coloring _ noise line integral convolution ). in addition, the method to draw and display shock wave by edge probing operator is introduced. in the design of the program, in order to overcome the shortcoming of visc2d with sdi ( single document interface ), the software vsv ( visualization of scalar and vector ) with mdi ( multi document interface ) is designed. compared with visc2d, the advantage of vsv includes : ( l ) vsv is a mdi applied software which can be used to view various kind of data, ( 2 ) vsv resolves the flash during displaying moving images which are produed by full - frame coloring method used to the visualization of scalar fields, and ( 3 ) vsv can be used to visualize vector field such as velocity. at last, the visualization of the output data from mmic in explosion and shock is realized by vsv
首先簡要介紹了科學計算與科學計算可視化的概念、歷史背景、意義及應用現狀，重點說明了計算爆炸力學中的可視化問題，在總結多流體網格程序mmic的可視化軟體visc2d和visc3d的基礎上提出了改進要點和本文的研究內容。在介紹可視化基本參考模型和mmic程序的數據文件結構的基礎上，給出了矢量數據文件的結構，詳細闡述了二維數據場的可視化技術，包括標量場和矢量場的可視化，針對原visc2d軟體的不足，給出了改進方法，提出了全幀著色映射方法和用於矢量數據可視化的基於噪聲著色的線積分卷積方法，以及提出了利用邊緣檢測運算元提取和顯示沖擊波的方法。在程序設計上，針對原visc2d軟體只適用於單文檔窗口的缺點，本文利用多文檔mdi窗口，研製了標量場與矢量場的可視化軟體vsv （ visualizationofscalarandvector ） 。
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