polygonal approximation 中文意思是什麼
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By the polygonal approximation method, a global approximation solution is constructed for the initial - boundary value problem of nonconvex scalar conservation laws with two - side boundary effect, and its convergence to the global weak entropy solution of the corresponding problem is proved
摘要使用折線逼近法，對具有兩條邊界影響的非凸單個守恆律初邊值問題構造了整體近似解，並證明其收斂到初邊值問題的整體弱熵解。 -
Firstly, in the reproducing kernel space, the spline function is discussed and its equivalent relations are gived ; we prove that the 2 - th differential operator interpolation spline function in the space can be expressed not only by the reproducing kernels but also by polygonal functions. so it is easy to prove its best approximation properties in theory and is convenient for numerical calculation in applications, too
首先，在再生核空間中討論樣條函數，給出其等價性條件；證明了空間中的一個二階微分運算元插值樣條既可由再生核函數表示又可由折線函數表示，這不僅在理論上便於獲得此種插值樣條函數的最佳逼近性質，而且在應用上也便於數值計算。 -
Contraposed those characteristics of leather, after studying all kinds of algorithms of image segmentation, this dissertation chooses the techniques of thresholding methods of parallel region segmentation and edge tracing methods of serial edge segmentation to detect the contour of the leather image. then by using polygonal approximation method, we can convert the contour ' s form from image into graphics. it will make following arrangement works more convenient
本論文針對皮革圖象的上述特點，在對各種圖象分割演算法進行研究后，選用了并行區域分割中的閾值化技術及串列邊界分割中的輪廓跟蹤技術，將皮革圖象的邊緣輪廓檢測出來，並對該輪廓進行多邊形擬合，使其由圖象轉換為圖形，以便為后續排樣工作提供方便。 -
The new ideas of this dissertation mainly lie in two points. based on the research on the traditional edge tracing techniques, this dissertation presents an improved method according to lml rule. at the same time, studying the polygonal approximation methods, this dissertation also presents an improved and based on mergence method to image contour, and implements the transform of the contour from image to graphics preferably
本文的主要創新點在於：在研究傳統輪廓跟蹤技術? ? 「爬蟲」法的基礎上，提出了基於lml規則的改進的輪廓跟蹤方法；同時，研究了多邊形擬合法，提出了基於聚合的改進的多邊形擬合物體圖象輪廓線方法，較好地實現了對邊緣輪廓線的從圖象到圖形的轉換。
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