法速曲面 的英文怎麼說

中文拼音 [fǎsùqūmiàn]
法速曲面 英文
normal velocity surface
  • 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...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 曲 : 曲名詞1 （一種韻文形式） qu a type of verse for singing which emerged in the southern song and ji...
  • 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...
  1. In the thesis, the general situation of the domestic and abroad developments in the field of the numerical control interpolation algorithm for aspheric surface machining is reviewed firstly, for the poorness of recent numerical control interpolation algorithm, an numerical control interpolation algorithm that based on the genetic algorithm ( ga ) and neural network ( nn ) is introduced

    在數控系統中，它是生成加工軌跡的一個最基本的子程序，在很大程度上決定了數控機床的加工精度和最大進給速度。本文首先綜述了國內外非球曲面超精密加工中所運用的插補演算法的發展概況。
  2. Reading graphics files and dispersing curves and surfaces. after lucubrating current algorithms dispersing trimmed surfaces, the mapping method is adopted. to avoid unnecessary or repeated calculations, a new tessellation algorithm for trimmed surface is introduced

    在深入分析目前流行的裁剪曲面離散演算法的基礎上，採用映射法對裁剪曲面進行離散，並針對面向網路會議的圖形瀏覽器要求圖形數據、剖分速度快的特點，提出了一種基於編碼的裁剪曲面離散演算法； 3
  3. A fast progressive surface reconstruction algorithm for unorganized points

    散亂數據點的增量快速曲面重建演算法
  4. Abstract : in this paper, a trimming method for subdivision surface is presented. it is applied well in the cad / cae system of plastic injection molding, and also useful for other designing of products and field of fem analysis. experimental results show that the method is highly automatic, quick and stable

    文摘:介紹一種基於離散曲面的裁剪演算法，該演算法適用於注塑模cad / cae或其它產品設計和有限元分析的領域，實踐證明該演算法自動化程度高、速度快、穩定可靠
  5. Based on a systematic discussion on the contents, characteristics and the up - to - now accomplishments of these three operations in cagd, we present our researches in three ways as follows : ( 1 ) efficient evaluation for parametric curves and surfaces based on generalized ball bases based on the generalization of mathematical model of surface lofting program in the consurf system, two generalized ball surfaces and the recursive algorithms for evaluating them are given. furthermore, the conversion algorithms from bezier form of a surface to these two generalized ball forms are presented

    在系統地論述cagd中此三類運算的內容、特點、已有研究成果的基礎上，就以下三方面給出了研究成果： （ 1 ）基於廣義ball基的參數曲線曲面快速求值以前英國航空公司consurf系統機身模線程序數學模型的推廣為基礎，定義了兩類廣義ball基曲面，給出了求值的遞推演算法，推導了b zier曲面到這兩類曲面的轉換演算法
  6. On the basis of these results, the relations of total - pressure recovery coefficient or flow coefficient and flight mach number, angle of attack and the second movable wedge angle of the inlet have been founded by hypersurface fitting, then the mathematical model of the inlet is established

    根據流場計算結果並利用超曲面擬合方法建立了進氣道總壓恢復系數、流量系數與飛行馬赫數、進氣道攻角及二級可調斜板角度之間的關系，由此得到了二元混壓式超聲速進氣道數學模型。
  7. On the other side, based on research on noncircular surface grinding features, this deissertation designs the data structure of simulation driver, then, applies interpolation theory to design the grinding motion simulation module and researches all sorts of cases on constructing the solid swept of grinding wheels in the process of noncircular surfaces grinding, finally, designs nc codes verification simulation module by using design model - based verification technique

    在實體模擬技術方面，詳細研究了非圓曲面磨削加工的特徵並設計了對應的模擬驅動數據結構;應用插補原理設計了體現加工速度的運動過程模擬模塊;詳細研究了非圓曲面磨削加工中砂輪的相對和絕對運動掃掠實體的構造，並採用基於精確實體設計模型的驗證方法構建了數控代碼的模擬驗證模塊。
  8. Basically like “ adaptive approach ”, the method can control triangulation density with respect to the change of normal curvature of the surface generating a small number of triangular facets, and thiny triangles, degenerate triangles and “ cracks ” in 3d space will not occur, but the speed of the algorithm is higher than that of adaptive one

    該方法基本上可以像「自適應」方法一樣，根據曲面的法曲率變化來控制三角化剖分的密度，生成的三角片數量較少，並且可以避免在三維空間產生狹長的三角形、退化三角形與「裂縫」 ，運行速度明顯比自適應方法快。
  9. In this paper, the waterway curve plane function is established with move fit method to calculate the depth value of grid points, and in part fields linear method is adopted because of the distributing scrambling of waterway measure points. as a result of the use of two methods, not only the calculating precision is high but also the calculating speed is very fast

    本文選用移動擬合法建立航道曲面函數，插值計算航道測量區網格點的深度值，並且根據航道測量點分佈的不規則性進行了優化，即在測量點稀少的地方運用了線形內插法代替移動擬合法來進行插值計算，兩種插值方法的合理結合，不僅保證了插值的精度，特別是提高了插值的計算速度。
  10. With energy method, we can conveniently control the precision of the objective surface and add boundary constraints for preserving the model ' s global geometric continuity, but this method is very time - consuming. stiffness adjustment is the easiest method to be implemented and the fairing result is always satisfying except that the acquired surface editing is awkward. based on wavelets decomposition, the surface model ' s data size can be compressed efficiently and this method is running fast, however, the error and boundary constraints are difficult to be considered

    其中基於能量原理的光順方法能夠方便地控制目標曲面的精度和邊界條件，從而能夠實現曲面模型的全局連續性，但是能量法的運算速度還有待提高；剛度調整法實現簡單，但是生成的曲面的可編輯性較差；小波分解方法計算速度很快，能夠有效地實現數據壓縮，但是其逼近誤差和邊界條件卻難于控制。
  11. We use bezier - shaped displacement reference curves to determine the new position of the vertices on the deforming surfaces. the proposed approach is fast and robust, and can support real - time interactive mesh editing and handle arbitrary meshes thanks to re - sampling and subdivision operations

    這種變形方法計算快速便捷，可以方便地集成到現有曲面造型系統中，結合重新采樣以及曲面細分等技術，這種曲面造型方法可以應用在任意拓撲結構的網格曲面編浙江大學碩士學位論文摘要輯上。
  12. The method takes advantage of bezier curve to work out a set of blade profiles of centrifugal pump, using thickening law to thicken the profiles. then the pressure and suction lines of the blade can be obtained. it takes advantage of bezier surface to create pressure and suction surface and makes use of mdt software to create the three - dimensional blade entity

    首先採用速度系數法計算得到離心泵葉輪的基本參數，再由b zier曲線生成一組葉輪葉片型線，按照加厚原理對型線進行加厚，得到正背葉片線，再採用張量積b zier曲面生成葉片正背面，由mdt進行三維實體造型得到葉片，從而得到流場計算區域的模型。
  13. In order to generate tool - path quickly, another method is presented. it can generate interference free tool - path directly from the section line of the triangulated surface model. search each vertex of the model to get the triangles which may be interfered using the radius of the cutter

    為了解決這一問題，本文又提出了基於加工曲面的截平面法，通過刀具投影和曲面模型節點坐標的位置關系確定可能發生干涉的小三角片的集合，以加快乾涉檢測的速度，然後在這個集合上生成無干涉刀位點。
  14. From the aspect of geometry, structure design, manufacture and examine, this paper generally summarizes the gcm ' s study progress in detail, discusses its kinetic rule and the determination of its primary structure parameter, and educes its surface equation and pressure angle equation based on the homogeneous matrix transformation and the conjugate engagement theory of spatial surface. on the basis of geometry study of gcm, the paper makes a comprehensive analysis to the interference phenomenon that will possible exist in the assemble course of two different structure of gcm with the help of matlab software

    本文從運動幾何學、結構設計、動力學、製造和檢測等方面對國內外弧面凸輪機構的研究進展進行了全面綜述，詳細論述了高速凸輪機構的運動規律和弧面凸輪機構基本尺寸的確定，基於空間曲面共軛嚙合原理，通過齊次變換推導了外弧面凸輪的曲面方程和壓力角方程，並提出了對應的廓面修形演算法；提出了內弧面凸輪機構的構想，推導了內弧面凸輪的曲面方程和壓力角方程。
  15. Secondly, analysed the approach model, described circular arc approximation method, approaching blade curved surface with this method and realized raise of the approach speed

    其次，分析了逼近模型，推導了單圓弧逼近方法，用這一方法來逼近葉片曲面，提高了逼近速度。
  16. Through numerous experiment and analysis of scattering characteristic about fat and protein in milk, we find their characteristic about fat and protein in milk, we find their scattering law and establish the correlative scattering model of fat and protein in milk. especially, we adopt surface fitting to break through this problem from theory and technology, without isolating protein from milk, we can directly measure the protein in milk, that is to say, completely realizing the quickly accurate measurement of protein in milk. furthermore, we bring prosperity for the field of measuring multi - ingredient in milk through light scattering theory

    經過大量實驗和對牛乳脂肪蛋白質的散射特性分析，我們找到了他們的散射規律，並建立了牛乳脂肪和蛋白質的關聯散射模型，並採用多元線性回歸的曲面擬合法徹底突破了這一難關，無需把蛋白質從牛乳中分離出來，可直接對牛乳這一復合體中的蛋白質進行測量，完全實現了快速而準確的牛乳蛋白質測試，為利用光散射原理同時測量牛乳多成份這一研究領域開辟了光明而廣闊的前途。
  17. The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller. the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution. for highly skewed propeller, the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface, which result easily in incorrect calculation results of velovity on blade surface, even in iteration divergence and calculation failure. a “ non - conventional grid ” is developed to acoid these problems. this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller. the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure. by sample calculating, the obtained results are satisfied the experimental data

    採用面元法預報大側斜螺旋槳水動力性能，螺旋槳表面及尾渦面離散為四邊形雙曲面元，每個面元上布置等強度源匯和偶極子分佈.對于大側斜螺旋槳而言，槳葉表面採用常規的等半徑網格劃分方法在近葉梢處將導致大展弦比、大側斜和扭曲面元，這容易使槳葉表面速度的計算結果不正確，甚至會導致迭代過程發散及計算失敗.文中建立了一種「非常規網格」劃分方法，能有效地解決大側斜螺旋槳的計算和收斂問題.槳葉隨邊處通過迭代實現非線性等壓庫塔條件
  18. In lifting - surface theory, the non - liner phenomena of the trailing vortex in the transition wake area and of the tip vortex separation are considered. in surface panel method hyperboloidal quadrilateral panels are employed and the morino ' s analytical formulation is used to determine the influence coefficients. the more reasonable pressure kutta condition is satisfied at the trailing edge of propeller blade

    在計算中，對于升力面理論，本論文考慮了過渡區尾渦收縮和葉梢分離的非線型現象的影響；對于面元法，本論文採用的是計算較為簡便的基於擾動速度勢的基本公式及雙曲面形狀的面元，在槳葉隨邊滿足更趨合理的壓力kutta條件，並用morino導出的解析公式計算面元的影響系數的快速有效的數值預報方法。
  19. Finally, the reconstructed surfaces were used in computer aided visualization of electrical design of airborne radome. on contrary to the traditional way of computing the angles of incidence by solving the problem that where the ray of electromagnetic waves intersected with the surface of radome, our method can express the distribution of the value of the angle of incidence on airborne radome succinctly and efficiently

    最後將重塑曲面應用在某型飛機雷達罩電性能參數的計算機輔助可視化設計中，改進了原有方法通過雷達電磁波入射線同雷達罩表面曲面求交解方程獲得入射角的繁瑣設計方式，快速直觀有效地表達了入射角參數在雷達罩表面的分佈情況。
  20. This paper emphatically researched the problem how to calculate the intersection point between workpiece that rotated with variational angle velocity and milling cutter that moved with complicated track and rotated with high speed. furthermore it adopted the discrete curve surface method for every milling cutter, and treated image frame as the control parameter of position of milling cutter during the intersection calculation process, so the algorithm of intersection between workpiece and milling cutter was obtained. the paper also discussed further three - dimension graphic problem of manufacture process

    文中對做變角速度運動的工件和運動軌跡復雜的高速自轉中的銑刀求交問題進行了重點研究，採用將銑刀上的每個刀尖劃出的曲面離散化的方法，以圖像顯示的幀數作為求交計算過程的銑刀位置的控制參量，得出了銑刀與工件的求交演算法。
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