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tree index中文是什么意思

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  • 樹型索引

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  • 例句與用法
  • Hbt lock on a heap or b - tree index
    Hbt =堆或b樹索引的鎖。
  • Nonclustered indexes have a b - tree index structure similar to the one in clustered indexes
    非聚集索引與聚集索引有一個(gè)相似的b樹索引結(jié)構(gòu)。
  • All internal data structures , such as b - tree indexes or doubly - linked lists , must be correct at the end of the transaction
    事務(wù)結(jié)束時(shí),所有的內(nèi)部數(shù)據(jù)結(jié)構(gòu)(如b樹索引或雙向鏈表)都必須是正確的。
  • The clustered index is implemented as a b - tree index structure that supports fast retrieval of the rows , based on their clustered index key values
    聚集索引按b樹索引結(jié)構(gòu)實(shí)現(xiàn), b樹索引結(jié)構(gòu)支持基于聚集索引鍵值對(duì)行進(jìn)行快速檢索。
  • Based on the technology and principle above , a experiment system was developed by the author . it provides the clew and method of building r - trees index based on gis platform . also , this paper introduces a strategy of implement of r - trees based on grass platform
    在上述技術(shù)和原理的基礎(chǔ)上,最終實(shí)現(xiàn)了一個(gè)實(shí)驗(yàn)系統(tǒng),提出了基于grass平臺(tái)建立了空間矢量數(shù)據(jù)的r樹索引的基本思路和實(shí)現(xiàn)方法,同時(shí)總結(jié)了技術(shù)上的不足和改進(jìn)方案。
  • It is a feasible way to manager spatial objects by utilizing relational database in the gis applications . we have brought to octa - tree index structure for managering spatial data efficiently in relational schema . by space filling curve , z - curve , we mapped rsdd to 1 - dimensional linear sp
    為了在關(guān)系模式下有效地對(duì)空間數(shù)據(jù)進(jìn)行處理,論文提出了八分樹的索引結(jié)構(gòu),并利用空間填充z一曲線把rsdd空間映射到一維空間,從而建立起了空間對(duì)象的索引順序。
  • These algorithms lead to optimal join performance : nodes that do not participate in the join can be judged beforehand and then skipped using b - tree index . besides , each element list joined is scanned sequentially once at most . furthermore , output of join results is sorted in document order
    其次,提出了兩個(gè)高效的兄弟關(guān)系的結(jié)構(gòu)連接算法,這兩個(gè)算法具有較好的連接性能:不參與連接的結(jié)點(diǎn)可以事先判斷出來并利用b樹跳過,連接的兩個(gè)列表最多都只需掃描一次,而且連結(jié)結(jié)果按照文檔序有序。
  • In addition , we summarize some spatial join algorithms based on r - tree index and their cost estimation models . we also give out a query optimization algorithm framework based on dynamic programming algorithm , and integrated basic r - tree index method and query optimization mechanism into sadbs ii
    另外,本文還總結(jié)了幾種基于r樹索引的空間連接算法及其代價(jià)評(píng)估模型,利用動(dòng)態(tài)編程算法給出了查詢優(yōu)化的算法框架,并在sadbs中集成了基本的r樹索引方法和查詢優(yōu)化機(jī)制。
  • It also can cooperate with acars system to provide data for oil consume analyse and technique evaluate , etc . this article discuss the working principle and realization of airplane flight safety real time monitor system , the core technology of real time database ( tplus tree index ) in detail , etc . while decoding module is one of the key modules , this article also introduces a high efficiency and easy extending qar data decoding arithmetic , the design and apply to background database , and the relative data load method in this module
    本文對(duì)飛機(jī)飛行安全狀態(tài)實(shí)時(shí)監(jiān)控系統(tǒng)的工作原理、實(shí)時(shí)數(shù)據(jù)庫的關(guān)鍵技術(shù)( tplus樹索引)和飛機(jī)飛行實(shí)時(shí)監(jiān)控系統(tǒng)的實(shí)現(xiàn)等,進(jìn)行了詳細(xì)的探討。由于譯碼模塊是該系統(tǒng)的核心模塊之一,同時(shí)本文也介紹了一種高效的可擴(kuò)展的qar數(shù)據(jù)譯碼平臺(tái)的設(shè)計(jì)和實(shí)現(xiàn),以及后臺(tái)數(shù)據(jù)庫的設(shè)計(jì)和應(yīng)用。同時(shí)本文也介紹了高效的數(shù)據(jù)導(dǎo)入的方法以及數(shù)據(jù)庫的性能優(yōu)化。
  • At first , it establishes the net and tree indexes system of performance appraisal and some new concepts of performance measure , coordination measure and continuity measure . then it interprets basic indexes of various subsystems of green marketing and the logical relations between these indexes . at last , it discusses the integrative appraisal model of index system based on net and tree structure , and develops the appraisal methods and models of developing , continuing and coordinating performance of green marketing
    主要內(nèi)容包括:建立了綠色營銷績效評(píng)價(jià)的網(wǎng)狀和樹形指標(biāo)體系;提出了績優(yōu)度、發(fā)展度、協(xié)調(diào)度和持續(xù)度等新概念;描述了綠色營銷的綜合指標(biāo)和基礎(chǔ)性指標(biāo);剖析了各種指標(biāo)間的邏輯聯(lián)系;研究了基于網(wǎng)狀結(jié)構(gòu)和樹形結(jié)構(gòu)評(píng)價(jià)指標(biāo)體系的集成評(píng)價(jià)模型、評(píng)價(jià)步驟和評(píng)價(jià)思路;提出綠色營銷的發(fā)展績效、持續(xù)績效和協(xié)調(diào)績效的評(píng)價(jià)方法和模型。
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