Surface reconstruction is one of key techniques in reverse engineering . based on unorganized discrete points come from finite element analysis triangular mesh on exterior surface of the aeroengine hollow turbine blade , this dissertation studied some related problems , such as scattered data preprocessing , quadrangle partition and surface reconstruction technology 曲面重構是逆向工程研究的重要內容之一,本文基于航空發動機空心渦輪葉片外表面的有限元三角網格離散點,對離散數據點的預處理、四邊域劃分及曲面重構技術進行了研究。
In this text , around the specification of frequency conversion machine , proceed some study , has finished some work as below primarily : this text will study the output characteristic and the output characteristic of variable frequency speed regulation system . the input characteristic include power quadrangle theory , the relation of cos ( ? ) , and f 本文圍繞著變頻系統的特殊性,進行了一些研究,主要完成以下的研究工作:本文對變頻調速系統進行了輸入特性和輸出特性的研究,輸入特性包括:功率四邊形理論,功率因數、效率和頻率三者之間的關系。
A tour to beijing rear lake area . visitors will be arranged to visit the old beijing lanes by rickshaws , hutong tour lasts for 2 hours , led by local guide , visitors will visit the typical chinese quadrangles , primary school , many famous old building , like the bell tower , where you can experience the real life of ordinary people in beijing 驅車20分鐘到達北京什剎海,精彩的北京胡同游開始,游客將乘人力三輪車進入老北京胡同地區,走進普通百姓人家,體驗北京人的傳統生活,參觀該地區著名的古建筑,參觀時間2小時。
Based on the characteristics of the geological exploring data , a method for establishing data model was presented , in which the triangle network was combined with the quadrangle network . at last , the geologic maps needed for geological research were drawn through the gdi ( graphics device interface ) and the 3d visualization system model was established for stratumtous geological body . base on the achievments mentioned above , a software system was developed which can be used independently without relying on any software platform 文中首先介紹了可視化技術以及地質制圖技術的發展,然后對地質構造可視化模型進行了研究,根據地質測量數據的特點,提出了三角形網和四邊形網相結合的數據建模方法,最后通過圖形接口繪制了地質研究所需的地質圖件,構建了層狀地質體三維可視化系統模型,并開發出了可以獨立于任何軟件平臺使用的地質三維可視化軟件系統。