reverse boundary 中文意思是什麼
reverse boundary
解釋
邊界方向反向-
Experimental research on the mechanism of reverse transition in turbulent boundary layer
湍流邊界層逆轉捩機制的實驗研究 -
Free form surface reconstruction is a key step in reverse engineering cad modeling. on the basis of segmentation, an approach of b - spline surface reconstruction with complicated boundary constraints is addressed
基於復雜邊界約束和內部散亂逼近的b樣條曲面重構理論和技術的研究是本文的一個重點和創新之處。 -
According to the particular characteristics of cad modeling in reverse engineering and the practical demands from customers, the author made an elaborate and in - depth study on b - spline surface reconstruction in three aspects, including b - spline surface fairing, local b - spline surface designing and b - spline surface approximating based on complicated boundary constraints
本文結合反求工程cad建模自身的特點和用戶的實際需要，主要對b樣條曲面造型三個方面的工作做了較為細致和深入的研究和探討： b樣條曲面光順、 b樣條曲面局部設計和基於復雜邊界約束的b樣條曲面逼近。 -
All of the results indicated the turbulent boundary layer had been turned into the laminar layer. the skin friction coefficient drops rapidly. this result not only proved the phenomenon of reverse transition had occurred, but also showed that this condition was drag - reducing condition
實驗結果表明板面附近的流動已由湍流流動轉變為層流流動，同時平板表面的摩擦系數較沒有溫度梯度時有大幅度下降，不僅證明了邊界層逆轉捩現象的存在，也說明了這種條件起到了減阻的效果。 -
Aiming at the existed problems in reverse engineering techniques concerning triangulation method for scattered data points, display technique of three dimension model based on mesh simplification, and redesign technique for re - constructed surface etc., this paper studies and proposes the relevant solving schemes, key algorithms and realizing technologies. the chief contributions acquired by this paper include : ( 1 ) an effective 3d triangulation algorithm for scattered data points is put forward. this algorithm solves the problem that data points must be partitioned for multi - projection realized by traditional 2d triangulation methods, and can also triangulate the scattered data points of trimmed surface and concave boundary surface
本文工作針對散亂點集的三角網格劃分及優化、基於網格簡化的真實感模型顯示，以及重構曲面再設計等反求工程的關鍵技術中還存在的諸多問題，提出了相應的解決方案，並對關鍵演算法和實現技術進行了深入研究，論文的主要成果包括： （ 1 ）提出了一種有效的散亂數據點集的3d空間直接三角網格劃分演算法。
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