預先計算曲線 的英文怎麼說

中文拼音 [yùxiānjìsuànqūxiàn]
預先計算曲線 英文
precomputed curve
  • 預 : Ⅰ副詞（預先; 事先） in advance; beforehand Ⅱ動詞（參與） take part in
  • 先 : 名詞1 （時間或次序在前的） earlier; before; first; in advance 2 （祖先; 上代） elder generation; ...
  • 計 : Ⅰ動詞1 （計算） count; compute; calculate; number 2 （設想; 打算） plan; plot Ⅱ名詞1 （測量或計算...
  • 算 : Ⅰ動詞1 （計算數目） calculate; reckon; compute; figure 2 （計算進去） include; count 3 （謀劃;計...
  • 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...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 預先 : in advance; beforehand
  • 計算 : 1 （求得未知數） count; compute; calculate; reckon; enumerate 2 （考慮; 籌劃） consideration; pla...
  • 曲線 : [數學] curve; bight; bought; profile; net曲線板 french curve; irregular curve; curve board; splin...
  1. Finally, a method is put forward to construct the nurbs curves on sphere, which extends the de boor recursive algorithm in r3 to one on the sphere by replacing the geodesic distances for the lines and studies their many geometric properties analogous to those in euclidean spaces, such as the differential property, the local property, the parameter invariance under a projective transformation, and so on

    兩種方法均給出誤差估計，使逼近螺線可達到任何預先給定的精確階。最後，給出球面nurbs曲線生成演算法：用球面上測地線? ?劣大圓弧代替直線段，將歐氏空間r ~ 3中的deboor遞推演算法推廣到球面上構造麯線。
  2. A novel method of content - based image segmentation using deformable template matching is proposed. a two - dimensional ( 2 - d ) deformable template based on orthogonal curves is built by pre - computing extensions of the deformable template along orthogonal curves and sampling the curves uniformly. then the definitions of internal and external energy functions are given according to the image segmentation problem, and genetic algorithm is used to obtain globally optimal solutions. the proposed method uses a lower - dimensional search space than conventional methods and reduces the sensitivity of the algorithm to initial placement of the template. experiments on real - world images and in simulations at low signal - to - noise ratio show the robustness and good performance of the method

    本文提出一種採用可變形模板匹配技術進行基於內容的圖像分割演算法.通過預先計算出可變形模板沿著變形的正交曲線，並對模板曲線及正交曲線進行離散抽樣，建立一基於正交曲線的二維（ 2 - d ）可變形模板，針對圖像分割問題定義控制可變形模板進行變形的內、外部能量函數，本文採用遺傳演算法搜索能量函數最小的全局最優解.該新演算法比傳統的可變形模板匹配方法降低了搜索空間的維數，減少了演算法對模板初始位置的敏感.對實際圖像及模擬低信噪比圖像處理的結果表明，新演算法具有良好的分割精度及穩定性
  3. ( 4 ) the application of artificial neural network in the field was studied. by bp ( back - propagation networks ) neural network and rational choice of the calculation factor, the relation between the improved mixture composition and combustion rate, and that between the charge of ignition rocket and p - t curve were simulated. the model could exhibit in essence the inherent relation and the forecasted results were in good agreement with the actual testing results, which showed that the model could be used as a guide for the design of the composition and the ignition engine, and that artificial neural network could be employed in the field for the purpose of reducing experimental work of hazardous materials

    （ 4 ）對人工神經網路在該領域的應用進行了研究，先後利用誤差反傳神經網路（ bp網路） ，並選擇合理的計算因子，分別對改進耐水點火藥配方與燃燒速度以及點火發動機裝藥與p - t曲線進行了模擬，模型基本能夠反應它們之間的內在聯系，預測結果與實際測試結果基本吻合，模型基本能夠指導藥劑配方和點火發動機的設計，表明了人工神經網路可以應用於該領域以期達到減少危險品試驗的目的。
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