等值面 的英文怎麼說

中文拼音 [děngzhímiàn]
等值面 英文
contour plane
  • 等 : Ⅰ量詞1 （等級） class; grade; rank 2 （種; 類） kind; sort; type Ⅱ形容詞（程度或數量上相同） equa...
  • 面 : Ⅰ名詞1 （頭的前部; 臉） face 2 （物體的表面） surface; top 3 （外露的一層或正面） outside; the ri...
  • 等值 : equivalent; equivalence
  1. To pin down the size of an orbital, we take a contour surface.

    為束縛住軌道的大小，我們取一等值面。
  2. Current equivalent facet algorithm for linear programming

    線性規劃流動等值面演算法
  3. Because 3d surface model contains huge number of triangles, a mesh simplification algorithm based on triangle edges shrinkages is presented in this paper to speed up the rendering in real time. in chapter four, the cutting of reconstructed 3d models is explored. in order to observe expediently the size and interspaces structure of inner tissues and avoid the discommodiousness of surface reconstruction, a simple cutting methods based on ray - casting algorithm is presented to get the inner images information

    第三章主要對marchingcubes （ mc ）表面重建演算法進行描述， mc演算法是基於規則體數據抽取等值面的經典演算法，本文實現了這種等值面構建表面模型的演算法，並對其演算法的二義性進行了相應的處理；針對其重建速度較慢的問題，提出了體素間相關性處理的方法來加快重建速度；並對其生成的表面幾何模型所包含三角面片數量巨大的問題，提出一種快速有效的三角形邊收縮演算法進行網格簡化，提高了表面模型的繪制速度。
  4. In computation of swept volume approximation, an improved technique to generate the swept volume approximation for arbitrary meshes is presented by introducing generator simplification and path resample using frenet moving frames along the discreted sweeping trajectory. other steps, such as a directed distance field computation on a uniform grid based on the hardware accelerated computation technique and iso - surface extraction using marching cubes algorithm, are also included in this algorithm. in addition, the simplification scheme and smoothing technique are applied to the swept volume generated from iso - surface extraction

    本文的主要貢獻在於：在掃描體逼近計算方面，在原有任意多邊形網格模型沿任意路徑運動生成掃描體逼近演算法的基礎上，提出了加入對掃描母體簡化的預處理和用活動標架對掃描路徑進行重采樣等過程，演算法的其它過程還包括：計算掃描體中幾何基元的排列，用硬體加速構造無符號的有向距離場，將無符號距離場轉化為有符號距離場，從有符號有向距離場提取等值面等。
  5. Volume rendering has a large scale of computing, and highly depends on hardware. both contour rendering and isosurface rendering are menthods of surface rendering

    面繪制的方法有:輪廓拼接法（ contourrendering ）和等值面提取法（ isosurfacerendering ） 。
  6. Because the former has the character of random, complex computing and poor effect of results of reconstruction, we use the method of isosurface rendering to reconstruction tissues and organs here

    由於輪廓拼接法的隨意性很大、計算復雜、重建效果不佳，本文採用基於等值面提取法來重建組織或器官的三維模型。
  7. An accelerated direct rendering algorith of isosurface for 3d data sets is presented. the problem for calculating the intersections of the ray and the bounding cells pierced by the isosurface can be viewed as the problem of sampling alonga 3d discreteray. it is shown that the algorithm is better on memory requirement and speed than traditional algorithm through its realization on pc

    提出等值面直接顯示演算法，充分利用數據空間的相關性，把體素分為邊界體素和內部體素，並採用體數據邊界表示法，降低了內存.繪制等值面時，將視線與邊界體素的求交運算轉化為對離散視線上點的掃描，避開對整個體數據空間的遍歷，從而減少了計算量。
  8. This new method has the capability of calculating complicated 3d grain burning surface. dealing with evolving interface of complicated material and topology change ( splitting. breaking. merging ), based on level set method and burning surface process law. this technique can get accurate area of burning surface each moment and data of geometrical structure that provide access to examination of grain change in the srm working process. 2

    結合固體火箭發動機燃面推移規律，在等值面函數法基礎上開發的裝藥燃面演算法能夠成功計算任意復雜三維裝藥燃面，並且具有處理復雜物質邊界及其拓撲結構發生變化（如分裂、破碎、合併）的能力，能夠準確計算出發動機工作過程中各個時刻裝藥的燃燒面積，同時輸出裝藥幾何構形數據直觀地觀察裝藥的變化情況； 2
  9. Level set method was used in this paper to attain burning surface variety regulation of arbitrary configuration grain by tracing interface of grain surface burnback. the work of this thesis can be summaried as follow : 1

    本文運用等值面函數法（ levelset ） ，追蹤固體推進劑燃燒界面的變化，從而獲得了任意結構型面裝藥的燃面變化規律，本文的主要工作及創新點概括如下： 1
  10. The doctors can observe the relationship and geometry of the organs and the tumors, from the 3d model of the human body, which can help them create the therapy plan. the radiation dosimetry is built using monte carlo method. after we extract the iso - surfaces from the volume of the doses, the relationship between radiation doses and the cancer is represented on a 3d model, which is greatly helpful for the doctors to improve their therapy plan

    通過建立三維人體模型，可以幫助醫生直觀的觀察人體內部病灶及組織器官的形態位置尺寸，並獲得其量化指標，從而更加準確的制定治療計劃：根據初步的放療計劃，使用montecarlo方法建立模擬的放射劑量分佈數據場，再通過等值面提取方法獲得等劑量面，顯示並量化劑量分佈情況和病灶（靶區）的關系；根據模擬的結果對放療計劃進行適當修改，並最終獲得最佳的放射治療計劃。
  11. In the area of isosurface rendering, mc ( marching cubes ) is the classical algorithm

    在等值面提取法中最經典的演算法是mc （ marchingcubes ）演算法。
  12. Several 3 - d rendering methods and their characters are analyzed. marching cubes, a kind of surface rendering method, is introduced. through the experiment on this method, the theory about cutting cubes and constructing isovalue surfaces is discussed

    在對基於表面重建技術的marchingcubes （ mc ）演算法的研究中，著重討論了其中剖分立方體構造等值面的原理，通過演算法的實踐，掌握其特點。
  13. We scan photographs of tissue slices to get 2d data and then these data are classified and transfer into 3d data which are saved into database. we do geometric construction by contour connection algorithm and render the tissue using volume data based on surface. some algorithms used widely are compared in this article and implemented in the experimental system : simulating lost datum by linear interpolation, adjusting surface profile by twice bezier interpolation, dealing with some special normalized vector

    通過掃描輸入的人體組織的切片圖象，獲得組織的二維信息，再將這些二維數據經過分類和轉換，把它們轉換成對應的三維體數據，在數據庫中保存：然後採用contourconnection演算法進行幾何重構，用三角面進行等值面擬合，實現基於等值面的體數據的三維圖像繪制。
  14. But the standard mc has some shortcomings : firstly, the standard mc picks up isosurfaces by threshold, however, threshold segmentation is invalid for picking up tissues or organs from some medical images ; secondly, the standard mc pocesses cubes one by one, that is to say, all the cubes will be checked, and the algorithm spents 30 % - 70 % of time to check the null units, so we need a reasonable data structure to travel the space data and accelerate the checking or filting of null units ; thirdly, the standard mc has a large scale of triangles, normally, the tissue or organ reconstructed includes hundreds of thousands so much as millions of triangles, this means it hardly to execute real - time rendering or interaction ; lastly, the standard mc can not get the very smoothly surface mesh, and there will be some unexpected accidented cases, especially in the case of big errors in oringinal data

    但是標準mc演算法存在較大的問題:標準mc演算法實質上是通過閾值分割來提取等值面，閾值分割對某些醫學圖像的組織或器官的提取難以得到較好的效果;標準mc演算法是逐個移動立方體來進行處理，就是說對所有的立方體都要進行一次檢測，演算法執行中30 % ~ 70 %的時間用在對空單元的檢測上，因此需要有一種合理的數據結構對空間數據進行有效的遍歷，以加速對空單元的檢測和過濾;標準mc演算法產生了大量的三角面片，一般重建的組織或器官包含數十萬甚至上百萬的三角面片，難以實現實時的繪制和交互操作;標準mc演算法得到的表面網格並不光滑，會有一些不期望的凹凸，特別是在原始數據有較大誤差的情況下尤其突出。
  15. Because the mc algorithm will examine all over the cubes in the data field, the speed of reconstructing model is very long

    由於傳統的mc演算法在生成等值面的過程中，要遍歷數據場中的所有體素，所以重建的速度很慢。
  16. Secondly, some techniques for image segmentation, such as edge - detection, grayscale thresholding and texture, are represented in detail. in the third part, two primary ways are designed for 3d modeling, one is based on the contours triangularization while the other is based on the iso - surfaces extraction. we use a condensed history monte carlo method to calculate and build up the radiation dosimetry, which is a regular data set suitable for creating the iso - surfaces

    論文首先介紹了醫學影像的獲取和預處理的方法，包括dicom標準、醫學影像的圖像增強及圖像校正等內容；提出了基於邊緣提取、灰度閥值和紋理信息等原理的器官分割方法；為了建立三維人體模型，介紹了兩類方法；基於輪廓線的方法和基於等值面提取的方法；在建立放射劑量場時，使用了經典的montecarlo方法；最後，詳細介紹了傳統的等值面提取方法（ marchingcubes ） ，並提出了一種啟發式搜索的marchingcubes方法。
  17. The present research status and some methodologies about the 3d reconstruction and visualization are introduced in this paper, while three important contents, i. e., image pre - processing, 3d reconstruction and 3d reveal are more concerned. image pre - processing includes interpolating, filtering, gray adjusting, rotating, zooming, selecting voi and reducing elements which are very important for the next step. the work of this paper use marching cubes ( mc ) algorithm to reconstruct the 3d object after analyzing the volume rendering method and the surface rendering method

    在二維圖像預處理方面討論了濾波、灰度修正、旋轉和縮放、感興趣區域voi （ volumeofinterest ）的提取、減少體數據集中象素的數目、層間插值等，這些處理可以減少噪聲的干擾，使物體的特徵更加突出、需要處理的數據大大減少、節省存儲空間、加快繪制速度，這些處理對於後一步的三維重建是非常必要的；在三維重建方面，分析了面繪制和體繪制各自的優點和缺點，選取了面繪制中經典的mc演算法實現三維重建；在三維顯示中實現對體數據的顯示、剝離顯示、旋轉、等值面顯示、沿x 、 y軸的剖切顯示、光照顯示等效果。
  18. Secondly, in this dissertation also introduces a new concept of " connected surface projection region ", and proposes a new algorithm for surface reconstruction based on projection. the zero isosurface is extracted using mt ( marching tetrahedras ) algorithm. in accordance with the intersection feature between isosurface and voxel, this dissertation made improvement in mt algorithm

    然後在分析輪廓投影關系特性的基礎上，給出「連接表面投影區域」的概念以及一種基於投影的體數據轉化表面重建方法，選擇marchingtetrahedras （ mt ）演算法進行基於體素的等值面重建，並根據重建的要求對mt演算法進行改進。
  19. They difined and kept the moving interface as zero level of level set function

    他們把運動界面定義成levelset函數的零等值面，然後始終保持它是零等值面。
  20. A note on the limit behaviour of solutions to boundary value problem with equivalued surface

    關于等值面邊值問題解的極限性態的注記
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