quad tree 中文意思是什麼

quad tree 解釋
象限四分樹
  • quad : n 1 四方院子；〈俚語〉監獄。2 ＝【印刷】 quadrat 3 ＝quadruple 4 ＝quadrant 5 【電訊】四心線組。v...
  • tree : n 特里〈姓氏〉。n 1 樹〈主要指喬木，也可指較大的灌木〉。 ★玫瑰可以稱為 bush 也可以稱為 tree 2 木...
  1. The main content is position matrix is set to record the location of wavelet coefficients, scanning the important wavelet coefficients first by using ordered quad - tree, and encoding the sign by using run length coding as well

    主要思想是：設立位置矩陣記錄子帶的位置信息，對高頻子帶內小波系數進行掃描排序形成有序四叉樹，對輸出的符號串採取行程編碼。
  2. In the thesis, compatible data storage fashion and data structure for a large - scale 3d scene is discussed firstly. then the process technique for dem, spatial object geometry data, texture image data and scene metadata are discussed in turn. finally, a new nested index, scene pyramid + sub scene regular dividing quad - tree is brought forward, which consumes less memory and reduces the complexity of spatial data query

    本文首先確定了適用於大規模三維場景可視化的數據結構和存儲方式；然後分別針對dem數據、地物模型數據、紋理影像數據及場景元數據論述了分割與lod處理的方法；最後給出場景金字塔與子場景規則分割四叉樹兩套索引的建立以及具體應用策略，該索引機制減少了內存消耗，降低了數據查找的復雜性。
  3. In the coding scheme, this paper uses the coding method based on quad - tree partition, which increases the speed and veracity of the coding and is useful for object recognition. there are various flags during the quad - tree partition coding. in order to get the best coding, this paper alteres the flags, which include maximum recursion depth, minimum recursion depth, domain pool type, scaling bits, offset bits, number of iterations

    這些參數包括有最小最大深度、 domain集類型、比例系數、偏移系數、匹配域類型；在解碼過程中，有迭代次數、比例系數、偏移系數，針對要編碼的圖像，調節以上參數，得到一組最佳參數，這樣，利用最佳參數可以達到最好的編碼質量，從而提高識別的效果。
  4. All kinds of method used around world and presented approach based on interval arithmetic and quad tree was presented

    總結了消除偏置曲線自交點的各種演算法的優缺點，提出了基於區間算術和四叉樹的演算法。
  5. Based on adaptive quad - tree fractal image encoding scheme, the concept and algorithm of peak signal noise ratio ( psnr ) based on the fractal codes is put forward, and is used to match the similarities between images

    本文以自適應四叉樹分割的分形圖像編碼為基礎，提出了圖像的分形碼峰值信噪比的概念和演算法，在無須解碼的情況下，直接對分形碼來量化圖像間的相似性。
  6. The quad - tree automatic simplification technique is used for that terrain in different " pyramid " levels takes on different resolution, and terrain in the same level has multi - resolution. in order to solve geometry - gaps, the author studies and compares two ways : pattern of restricted quad - tree and mark points and pattern of changing connectivity of vertices for higher resolution

    考慮vrml特點，採用「金字塔」數據結構組織地形數據，通過基於四叉樹的地形數據簡化演算法對地形數據進行簡化，使「金字塔」的不同的層次間具有不同的解析度，同一層次間也具有不同的解析度。
  7. After analyzing the different requirement of points reduction, the nurbs surface reduction and the quad - tree structure - based method of scattered points are presented. the specific algorithms of each are given

    研究了數據分塊技術，結合特徵提取的過程和演算法，提出了基於特徵框架的數據分塊方法。
  8. A quasi - three - dimensional propagation model has been presented for path - loss prediction in a typical urban site, based on ray tracing with quad - tree method of subarea. the model takes into account numerous rays that undergo reflections from ground and wall surfaces and diffraction from corners or rooftops of buildings

    在總結前人工作的基礎上，本文採用四叉樹分區法建立了一種準三維電波傳播模型，並以vc + + 6 . 0作為編程平臺實現模擬。
  9. 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。
  10. In the paper i propose and realize the lod based on transitional band. quad tree algorithm and roam algorithm are depicted in detail

    本文介紹了基於四叉樹lod 、基於二元三角樹結構的法則roam ，而且提出並實現了基於過渡帶的lod 。
  11. This paper presents an algorithm for regular square grid model, which based appropriate criterion and quad tree structure, the multi - resolution representation mechanism, the dynamic terrain simplification, error metrics, deleting cracks, fast generation the triangulation are discussed in the paper

    摘要討論了地形模型的多解析度表示機制、節點評價函數、動態簡化演算法、裂縫的解決方法、三角網快速構建等地形可視化中的關鍵問題。
  12. We first put forward the file system of hierarchy structure through an object - oriented programming approach. to deal with great amount of data from geographic information and the need of fast access, we design a kind of professional embedded gis data structure to combine the quad tree storage format and the deploying mode of the file system. this method can implement the fast access for geographic information data

    通過面向對象的程序設計方法提出層次體系架構的文件系統；並針對地理信息數據量大的特點和快速空間存儲的需求，提出了一種將四叉樹存儲格式與文件系統的調度方式相結合的嵌入式gis專用數據結構，實現了地理信息的快速存取。
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