concave key 中文意思是什麼
concave key
解釋
凹面鍵-
The utility model discloses a luminescent computer keyboard key, which comprises : a key body ; a concave groove, which is arranged on the top of the key body and is used for embedding phosphor powder display character layer under night light and transparent protection surface layer ; after embedding into said groove, the surface has a transparent protection layer with thickness leveled as top face of the key body
本實用新型公開了一種夜光計算機鍵盤按鍵，該按鍵結構包括：鍵體；鍵體頂面設置的供鑲嵌熒光粉夜光顯示字元層及透明保護表層的凹槽；具有鑲入所述凹槽后，其表面與鍵體頂面平齊的厚度的透明保護層。 -
This paper also analyzed some key problems in 3d triangulation from scattered points. new determining principles for the relationship of point and line in space and for convexo - concave vertices of space polygon is discussed which corrected the previous method and can be applied in space triangle mesh. at the end of this papar, the future research areaes of triangluation from 3d scattered points are demonstrated
本文還分析了三維空間直接三角剖分所要解決的一些關鍵問題，進而提出了空間中點與直線位置關系判別的新方法及空間多邊形頂點凹凸性判別的新方法，修正了以往演算法在應用上的局限性，使之能夠適用於復雜網格多邊形邊界。 -
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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