tracing point 中文意思是什麼
tracing point
解釋
軌跡點-
Pseudo orbit tracing property and almost periodic point
偽軌跟蹤性與幾乎周期點 -
The solution algorithm involves tracing the characteristic lines backwards in time from a upwind element of an interior point. two advanced mehtods, quasi - consistence and consistence hexahedral element method, for three - dimensional advective problem are developed. and comparison of these two methods with linear interpolating function method is implemented
當re 400時，流動明顯地具有二維性； re 800時，流動具有一定程度的三維性，而且出現了次迴流區； re 1000時，流動則具有明顯的三維性。 -
In order to utilize the frquency resource adequately and increase the capacity of mobile communication system, the wireless electric wave propagation of existing mobile system always adopts the microcell structure. forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network, at the same time it is a precondition for the research on the microcell mobile system. the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond, that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method, that is establish the deterministic model based on theoretical analyse. the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth, and introduce the common path loss transmition model in land mobile communication system, also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網路規劃、設計提供了必要條件，同時也是研究微蜂窩移動通信系統性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據實驗、統計所得數據建立經驗性傳播預測模型；另一種是用射線跟蹤方法，即依據理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Geometry parameter selection was optimized. firstly we discuss gauss ray tracing and the two - point ray racing
本文的研究首先討論了高斯射線束正演和兩點射線路徑追蹤正演。 -
Retrieval spatial database by using the position of two point specified by user, complete the navigation automatically ; tracing and real - time display user current location depending on navigation map ; accomplish the query based on spatial relationship and property feature
解決的問題有：根據用戶指定的任意兩點位置檢索空間數據庫，完成自動游覽；利用導航圖跟蹤和實時顯示用戶的當前位置；結合vrml與java技術完成基於空間關系特徵的查詢和基於屬性特徵的查詢。 -
We select a common feature in the image - edge of the object as our research content and from this point we spread our work including the contrast enhancing technologies, using mathematical morphology to restrain noises in image, extracting of the geometric primitives, dwt in edge detection and the border thinning and tracing technologies
我們重點針對圖像物體的最直觀特徵?邊緣進行研究，以此為出發點，研究了包括水下圖像對比度增強，利用同態學進行水下圖像噪聲去除，直線和橢圓基元的提取，利用小波變換進行邊緣提取以及基於多邊形近似原則的邊緣追蹤技術在內的各種演算法。 -
In this paper, on the basis of existing tracing method and differential coefficient method, five new methods are put forward, superposing of infinitesimal element - tangent method, differential coefficient - tangent method and equation method, by taking advantage of fast calculating ability of the computer. two - dimensional planar electrostatic field of complicated charged bodies are simulated successfully with these methods. the changing trend of electric field along a certain direction of a set of point charges are also given in this paper
本文利用計算機快速準確的計算能力及其強大的圖形處理功能，在現有循跡法和微分法的基礎上，提出了微元疊加一切線法、微分一切線法以及方程法方法，成功地模擬了一些復雜帶電體的二維平面靜電場以及平面分佈的點電荷系的電場沿空間某方向的變化趨勢。 -
It can be used in any complex environment, can locate all paths from transmitter to receiver which avoid redundant calculation, and it is a standard 3 - d forecast model ; in addition, it is a point to point ray tracing method based on specular theory which do n ' t carry out the receive test ; furthermore the model adopt the reverse arithmetic which exert the tree concept in data frame and establish a virtual fountain tree permanently, the proagmme can back - search the virtual fountain tree when it is running. these operation increase the calculate speed and it result in the higher receive efficiency and precision. the thesis design a programme to compare the prediction results based on ray tracing method of virtual fountain tree between the measurement results and prediction results based on the other transmittion models. the comparsion result indicate the new model is a better model
它可應用於任何復雜的傳播環境中，能找到發射機到接收機之間的所有電波傳播路徑而無須冗餘的計算，是一種準三維的預測模型；另外，從本質上講，它仍然是一種基於鏡像理論的點對點的射線跟蹤法，所以它無須進行接收測試；而且由於採用了反向演算法，運用數據結構中多叉樹的概念，先確定需要計算的場點位置，找出所有能從源點到達場點的射線，並且可一次性建立一個虛擬源樹，以後每次的計算只要通過對該樹進行後序遍歷即可，大大提高了運算速度，因而有較高的接收效率與精度。本文對該模型進行了相應的模擬，並將其預測結果與實測結果以及基於cost231經驗性模型和基於強力射線跟蹤確定性模型的預測結果進行了比較，結果表明了該模型的優越性。 -
The two point ray tracing is based on the snell theory and the fermat " minimum travel time principle ", which advantages is that it can calculate the accurate ray path from the source to the receiver
兩點射線追蹤主要是通過snell定理和費馬最小時間原理確定激發點和接收點之間精確的射線路徑。其優點是能夠精確得出反射點的位置。 -
Arrow point tracing
箭頭描記法 -
This paper proposes a method for optimizing the parameters of geometry system. based on the ray tracing for the built - model, discussing and analyzing the parameters of geologic aim such as the bin size, calculating the fold of aim layer ' s common reflection point, comparing the fold of crp with the fold of common mid - point, the geometry system ' s parameters are adjusted to improve the low fold bins, the quality of data collection and effect of exploration
本文提出了首先建立目標地質體的數字模型，根據射線追蹤正演分析，目標地質體的參數分析（面元分析等） ，統計求取復雜地質模型目標層真正的共反射點覆蓋次數，比較cmp面元與實際crp面元的覆蓋次數差異， cmp道集對應的共反射點面元分析，針對覆蓋次數較低的目標層面元調整和優化觀測參數，提高目標層的採集質量和勘探效果。 -
Making use of the ridge tracing results, the algorithm can obtain some attributes of the feature points. combining the attributes and the local structural information, it can identify and eliminate the false feature structures, so as to eliminate the false features. ( 3 ) in the matching section, a reference point orientation algorithm based on block direction and its sine component is given at first
前者把8鄰域編碼技術和查表法引入到紋線跟蹤中，提高了紋線跟蹤的速度；後者利用紋線跟蹤的結果，提取指紋特徵點的屬性，並結合特徵點的局部結構信息，總結出各種偽特徵結構的特徵，進而對其進行識別和濾除，達到濾除偽特徵點的目的。 -
On the basis of the geochemistry digital model arithmetic of triangulated irregular network, i change the arithmetic of auto - tracing isoline. in process of auto - tracing isoline, the proplem of tracing - crossand and mini - heave was resolved. the isoline is smoothec by linear overlap algorithm. in addtion, the model can build other unit of map such as extramum point, polygon
在不規則三角網數字模型的基礎上，改進並實現了等值線生成演算法，解決了等值線生成中的分叉問題，解決了等值線上的小凸起問題；對等值線採用線性迭代演算法進行了圓滑處理；提出延伸三角網演算法，用於實現了開等值線的閉合；生成用於地學分析的區域圖元，等值線圖元，極值點圖元等。 -
Armstrong is a single source and a central point of accountability for detailed engineering, procurement, construction and installation - all adding up to turn - key steam tracing solutions that streamline projects, saving you time and money
Armstrong提供的蒸汽伴熱系統發行服務是包括詳盡的工程設計、采購、施工和設備安裝在內的一攬子型負責到底的工程服務，旨在提高您能源系統的效率，節約您的時間和資金。 -
In this paper, i will present some algorithms of polyhedral visual hull reconstruction : ( 1 ) polyhedral v isual h ull generation a igorithm b ased one dge - pool - searching, which constrains the 3 - d intersections into the 2 - d planes intersection via the epipolar theory to reduce the complexity a nd c an r educe t he t imes f or c ones t o b e p rejected o nto t he i mage p lanes, i n which we induced the index list to every points on the surface of object, and connected the related points to get sub polygons on surface and in turn get the mesh model, we replace triangulation process of disordered points cloud by edge - pool searching. ; ( 2 ) reconstruction based on degenerated - polygon - intersection, which have the following improvements on traditional bull intersection : using degenerated polygon to orga nize intersected area on cone face, which may be discontinuous ; a fast intersection algorithm of polygons on the cone face based on degenerated polygons, which is consistent between the continuous polygons and the discontinuous ones. the intersection of degenerated polygons is similar to the convergence of two ordered lists, which is comparably simple to the bull operation ; ( 3 ) reconstruction algorithm based on ray - tracing, in which all the rays that run through the vertex on silhouette of object will intersect with all the cones correspondent to other silhouette, and we have to calculate the intersection of all such line segments, the endpoints of which are considered to lie on the surface of object and we will get the point cloud on the surface of object
同時利用共極線原理把三維計算投影到二維平面以降低求交計算的復雜度，該演算法可以減少光錐向圖像平面投影計算的次數，以邊池搜索取代散亂點集上進行的三角剖分； （ 2 ）基於退化多邊形求交的多面體可見殼模型重構，系統引入退化多邊形的概念，把錐體平面的交集中不連通的部分用一個退化多邊形來表示，並引入了新的基於退化多邊形的求交演算法，與傳統多面體可見殼重構相比，該演算法有以下幾點創新：在圖像平面以退化多邊形組織投影錐體和物體輪廓的交集，把任意錐面與物體輪廓的交集歸一到一個退化多邊形；基於退化多邊形的二維平面上多邊形快速相交演算法，該演算法在一定程度上就是兩個有序鏈表的合併，大大簡化了先前的布爾求交計算； （ 3 ）基於光線跟蹤的演算法，該演算法中所有通過輪廓頂點的光線和對應其它圖像輪廓的光錐進行求交計算，最後得到每次求交計算得到線段的交集，該線段的頂點就認為是物體表面點，從而得到物體表面的點雲。 -
The quasi - fixed - point tracing method for mulit - periodic - solutions of a nonlinear dynamic system
非線性動力系統多重周期解的偽不動點追蹤法 -
Because the mirror image method is basing on the point - to - point ray tracing method, the computational solution precision is higher
鏡像法是基於點對點的射線追蹤法，所以計算結果精度較高。 -
First, the authors uses regional growing algorithm based on seeds point selected by manual work to ascertain the main area awaits to be segmented, then taking advantage of the precision of the edge tracing method to precisely define the boundary and thus to attain the precise segmentation
先用人工選取種子點的區域增長演算法確定待分割組織的主體區域，再利用邊緣跟蹤法對細節處理較好的特點精確定位邊界，從而達到準確分割的目的。
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