feature ordering 中文意思是什麼
feature ordering
解釋
特徵排序-
Selection and ordering of working procedure and working step are realized based on gt ( group team ) principle and part feature bom and deriving method, and automatic selection of process data and equipment are realized by using logic determination method
基於成組原理，結合零件特徵bom ，用派生法實現了零件工序工步的自動選擇和排序；採用邏輯決策的方法實現了工藝參數和設備的自動選取。 -
In the case of data index, the paper generalizes several advanced data index at the present time and analyzes the feature of data index based on database emphatically. then it illustrates the spatial ordering quad - tree index based on database of gde. in the case of geographic data management, the paper studies and tests several primary technologies, such as data concurrent access, data storage, data query, data update and maintenance, data transmission and data buffer, and so on
數據模型方面，在對常見的數據模型進行描述和分析的基礎上，提出了滿足海量數據高效存儲和管理的gde數據模型，通過實驗對數據的存放方式和效率進行了測試；數據索引方面，歸納總結了當前提出的較為先進的幾種數據索引方法，尤其是著重分析了基於數據庫的數據索引的特點，並對gde基於數據庫的可排序四叉樹索引進行了重點闡述；地理數據管理方面，對數據並發訪問、數據查詢、數據更新與維護、數據傳輸以及數據緩存等關鍵技術進行了闡述和實踐；地理數據訪問對象方面，介紹了採用面向對象技術設計實現的地理數據訪問類。
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