邊界表示法 的英文怎麼說

中文拼音 [biānjièbiǎoshìfǎ]
邊界表示法 英文
boundary representation （b-rep）
  • 邊 : 邊Ⅰ名詞1 （幾何圖形上夾成角的直線或圍成多邊形的線段） side; section 2 （邊緣） edge; margin; oute...
  • 界 : 名詞1 （相交的地方; 劃分的界限） boundary 2 （一定的范圍） scope; extent 3 （按職業、工作或性別等...
  • 表 : Ⅰ名詞1 （外面;外表） outside; surface; external 2 （中表親戚） the relationship between the child...
  • 示 : Ⅰ動詞（擺出或指出使人知道; 表明） show; indicate; signify; instruct; notify Ⅱ名詞1 [書面語] （給...
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  • 邊界 : boundary; frontier; border; borderline; edge range line; periphery
  • 表示 : show; express; mean; indicate; expression; presentation; signifying; remark; representation
  1. A patch antenna with etched holes on the ground plane is also studied. the performance of the antenna at the resonant frequency is analyzed by using the fdtd method together with the pml boundary treatment. the results show that the surface waves are suppressed greatly, the bandwidth is improved and a 1 odb reduction on the sidelobe level is achieved at the 110 and 260 directions in the e plane

    全面地研究了地面腐蝕周期圓孔結構的電磁晶體貼片天線在基波頻率處的性能，用fdtd方法並結合pml邊界處理技術對該天線所取得的研究結果顯示，本文設計的地面腐蝕型電磁晶體結構抑制了貼片天線中的表面波，增加了天線的帶寬，並有效地削弱了旁瓣，使天線的e面方向圖上110和260方向的兩個旁瓣被削弱了10db 。
  2. The key techniques for reverse engineering based on ct image are introduced. 3d reconstructed surface model does n ' t possess full geometry and topology information as solid geometry model. this dissertation presents an algorithm for rebuilding solid model from triangulated patch surface mod

    介紹了基於ct圖象反求的主要技術；針對重建三維表面模型不具備象實體幾何模型的數據那樣的完備信息的特點，提出一種基於ct圖象的反求技術的實體幾何造型方法，將重建模型轉換為邊界表示的實體模型，並將其作為本研究所開發的特徵造型系統3dmodeler中的一種反求工程實體造型手段。
  3. He says he would prefer to have mexican laborers remain here rather than cross the border illegally to work in the united states

    他還表示他更希望墨西哥勞動力在本地就業，而不是非法越過邊界到美國工作。
  4. From mathematical models for inverse scattering in two dimensional inho - mogenous media including variable impedance, all kinds of probable mixed variable impedance boundaries and cracks, from interior and exterior trans - mission problems and radiation condition, ill - posed integral equation and indicator function method are formulated for the diverse of boundary iden - tification. it is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solving it by virtual of regularity method, meanwhile, some numerical tests are given. 3

    在二維非均勻介質逆散射邊界識別的數學模型（包括一般的非均勻介質，正交各向異性介質，變阻抗介質，各種可能的混合變阻抗邊界問題）下，由內透射問題和外透射問題以及輻射條件，推導了上述介質的邊界識別的積分方程和指示函數方法，由於積分方程的核充分表徵了散射物的邊界，由此說明只要利用正則化方法求解該積分方程，就可以確定散射物的邊界。
  5. From mathematical models for inverse scattering in two dimensional homoge - nous media including dirichlet, neumann, robin, all kinds of probable mixed boundaries and cracks, direct and inverse scattering are discussed, and ill - posed integral equation and indicator function method are formulated for the diverse of boundary identification. it is shown that the kernel of the integral equation characters the boundary of scatterer, which is determined by solv - ing it by virtual of regularity method, meanwhile, some numerical tests are given. 2

    在二維均勻介質逆散射各種邊界識別的數學模型（包括dirichlet ， neumann ， robin ，各種可能的混合邊界問題，裂紋問題）下，分別考慮了正散射問題和逆散射問題，推導了上述各種邊界識別的不適定積分方程以及指示函數方法，由於積分方程的核充分表徵了散射物的邊界，由此說明只要利用正則化方法求解該積分方程，就可以確定散射物的邊界，並給出了一些數值實驗。
  6. On the basis of the work in xie et al. 5, xie et et al. 7 and liang et al. 8 established a dynamic repre - sentation of the groundwater table in a land surface model through reducing it to a moving boundary problem and solving it by the mass - dumped finite element method

    基於以上工作，謝正輝等7 ， liang等8通過將地下水位動態表示問題歸歸結為運動邊界問題，用有限元集中質量法直接求解，建立了地下水位的動態表示模型
  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. The main results in this paper as follows : first, a prototype of a shape - based image database retrieval system is completed, it can receive the query mode both by giving an example image and by sketching the desired object on the screen, second, five shape - based image retrieval methods are realized ; third, an algorithm based on triangulation for shape - based image retrieval is brought forward. in this algorithm, firstly, the edge of the original image is followed and the candidate corners in the original image are detected. then the counterpoints of the candidate corners in the result of edge follow are found, and the boundary corners whose counterpoints have been found are queued in the order of their counterpoints in edge follow

    同時本文中主要完成了以下三方面的工作：完成了一個基於形狀特徵的圖象檢索的原型系統，可實現例子圖象或徒手繪草圖兩種查詢方式；實現了五種利用形狀特徵進行圖象檢索的具體方法，並對其進行了分析比較；並且在繼承將三角剖分引入形狀檢索的思想基礎上提出了利用三角剖分進行形狀檢索的一種新演算法：先對原圖象進行邊界跟蹤和角點檢測；然後尋找初始角點在邊界跟蹤中的對應點，並對找到對應點的角點按其對應點在邊界跟蹤中的順序進行排序；再對排序后的角點進行德洛內三角剖分，得到能表示目標真實形狀的三角形序列；最後計算三角形序列的角度直方圖作為形狀特徵，並進行相似性匹配。
  9. After reviewing wavelet theory, pyramid wavelet decomposition was introduced to texture representation, we discussed the problem of optimal window size for texture feature extraction method ; the problem of local statistical feature value refinement has been studied, and a refinement method has been given which can decrease the boundary effect in calculating the feature value

    在敘述小波分析理論的基礎上，把金字塔小波分解引入到紋理表示中來，討論了提取紋理特徵值時選取窗口大小的問題；研究了局部統計特徵值的改進問題，給出了一種對所提取的紋理特徵值的改進演算法，一定程度上克服了計算紋理特徵時的邊界效應。
  10. To illustrate the procedure and to lend concreteness to the ideas expressed in this section, a specific boundary-value problem is studied.

    為了說明方法和對本節所表示的概念的具體化，將研究一個特殊的邊界值問題。
  11. This thesis concentrates its research mainly on the method of rule learning base on bp neural network which definition of rules are combined the web pages ’ features of path, left / right boundary and semantic

    本文的工作重點是基於bp神經網路的規則學習方法，規則的表示結合網頁的路徑特徵、左右邊界特徵和語義特徵來定義。
  12. In addition, several way are adopted to optimize the one dimensional transform architecture. improving the architecture resulting from the standard lifting scheme reduces the critical path delay ; an embedded boundary extension algorithm is adopted instead of the standard symmetric extension and it ’ s easier to implement ; the pipeline technique is adopted to increase the speed of processing ; coefficients of the multipliers are transformed into csd forms and the multiplications are substitute by minimum shift - add operations

    改進了由標準的提升演算法得到的變換結構，減小了關鍵路徑上的延時;採用內嵌的邊界延拓來代替標準的對稱延拓，實現更加簡單;採用流水線技術顯著提高了處理的速度;把乘法器系數表示為csd形式，將常系數乘法優化為最少的移位加操作。
  13. In this paper, on the base of paraxial approximations, we present a set of absorbing boundary conditions of 3d elastic wave equations and apply to the 3d elastic wave numerical modeling in isotropic medium

    本文基於傍軸近似法提出了計算三維彈性波方程的吸收邊界條件公式，表示了各邊界面、邊棱和角點處波場所滿足的單程波方程，並在三維彈性波數值模擬中進行了應用。
  14. Under opengl environment, we use four - side grids to reconstruct a worm surface and gain a solid modeling of worm. under the computer virtual reality environment, we simulate the manufacturing process of dual generating method

    在此基礎上，在opengl編程環境下，以四邊形網格構造蝸桿理論型面，以邊界表示法中的半邊數據結構表達蝸桿實體，獲得蝸桿的三維實體模型及其型面數據。
  15. This provide a basis for further application such as feature editing and so on. unlike traditional method which modifies b - rep or csg to adapt feature - based modeling, the feature - based represent model for the product which based on identifying system is presented. the represent method need not change the b - rep of solid model and can map feature - based model to b - rep - based model

    不同於通常的對邊界表示法或csg法進行改造的模型表示方法，提出了一種基於標識子系統的特徵表示模型，一個零件的特徵表示模型和其低層的幾何實體模型通過標識子系統進行映射，從而不必修改現有的邊界表示模型而能滿足特徵造型的需要並能充分利用已有的實體造型功能。
  16. Border panoramas try to construct a novel flexible representation of 3d plenoptic function by combining the mature panorama technique with the approximate means of ignoring vertical parallax

    邊界全景圖方法把常用的全景圖技術與忽略垂直視差的近似方法結合起來，構造了一種新的靈活的三維光場表示形式。
  17. This thesis develops research on efficiency issue for reconstruction based on the b - rep method. it primarily resolves low efficiency issue of judging and removing pseudo elements and decision - making

    本文針對基於邊界表示方法的二維視圖重建三維實體重建過程中存在的效率問題展開研究，主要解決了假元判定與刪除演算法和決策求解演算法的低效率問題。
  18. Finally in chapter 6, the problems of boundary conditions and incident wave, as the most valuable problem of mrtd as a time - domain method, are studied. this chapter presents the simulation results of the electromagnetic propagation and its interactions with the dielectric slab and analyse of the graph of the reflection coefficient in frequency. compared with fdtd results, the numerical results, obtained using the mrtd method, show the directness and conciseness of mrtd as a time - domain method and the advantages in grid enlargement and saving computer resource etc.

    最後，第六章討論了mrtd作為時域數值技術最具實際應用價值的邊界條件設置和入射波加入等問題，並給出模擬電磁波傳播過程和介質板反射系數頻譜分析，其數值結果表明了mrtd作為時域方法的直觀簡練，與fdtd方法的結果比較，顯示了其在擴大網格、節省計算資源等方面的優勢。
  19. The moment method is used to calculate the rcs of three - dimensional targets in this paper. these targets include conducting targets, dielectric targets and coat targets. triangular patches are used to model the surface of the target, then electric field integral equation ( efie ) and magnetic field integral equation ( mfie ) are built which satisfy the boundary conditions. the rwg vector base functions are used to denote equivalent electric current and magnetic current on the surface of the target. finally use the galerkin method ( rwg vector base functions are basis function and test function ) to transform integral equations into matrix equation. when obtain the equivalent electric current and magnetic current, we can calculate the scattering field and the rcs of the target

    本文利用矩量法計算了三維導體目標、介質目標、塗層目標的雷達散射截面。首先採用三角形面元對物體表面幾何形狀進行模擬，然後建立滿足邊界條件的電場積分方程（ efie ）和磁場積分方程（ mfie ） ，將物體表面的等效電磁流用rwg矢量基函數表示，最後利用伽略金法（ rwg矢量基函數既作為基函數又作為檢驗函數）將電磁場積分方程轉化為矩陣方程求解未知電磁流系數，得到了表面的等效電磁流后，可以計算散射場和目標的雷達散射截面。
  20. The formulation for the error analysis of acoustic radiation problem calculated by the boundary point method ( bpm ) is put forward ; the physical explanation of the boundary point analysis of the acoustic radiation problem is given ; the influence of the particular solution on the calculation stability of the bpm is studied ; the etthanced volume source boundary point method ( evsbpm ) is presented ; a test for the effectiveness of the evsbpm is carried out on the aspects of its calculation precision, calculation speed, calculation stability, adaptation to the geometric shape of vibrating body as well as its ability to overcome the non - uniqueness problem through various examples with different boundary shapes and different boundary value distributions

    第三章導出了邊界點方法分析振動聲輻射問題的誤差估計理論公式，揭示了邊界點方法分析振動聲輻射問題的物理本質；研究了特解場的局部特性對邊界點方法的數值穩定性的影響；改進了現有的特解場構造方法，提出了改進體積源邊界點方法；通過諸多不同邊界曲面和不同邊界量分佈的聲輻射算例，從計算精度、計算速度、計算穩定性、對振動體表面幾何形狀的適應性以及克服解的非唯一性等方面，對改進體積源邊界點方法的有效性進行了考證。
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