tree index造句
例句与造句
- Hbt lock on a heap or b - tree index
Hbt =堆或b树索引的锁。 - Nonclustered indexes have a b - tree index structure similar to the one in clustered indexes
非聚集索引与聚集索引有一个相似的b树索引结构。 - All internal data structures , such as b - tree indexes or doubly - linked lists , must be correct at the end of the transaction
事务结束时，所有的内部数据结构（如b树索引或双向链表）都必须是正确的。 - 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树索引结构实现， b树索引结构支持基于聚集索引键值对行进行快速检索。 - 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
在上述技术和原理的基础上，最终实现了一个实验系统，提出了基于grass平台建立了空间矢量数据的r树索引的基本思路和实现方法，同时总结了技术上的不足和改进方案。 - It's difficult to find tree index in a sentence. 用tree index造句挺难的
- 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
为了在关系模式下有效地对空间数据进行处理，论文提出了八分树的索引结构，并利用空间填充z一曲线把rsdd空间映射到一维空间，从而建立起了空间对象的索引顺序。 - 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，提出了两个高效的兄弟关系的结构连接算法，这两个算法具有较好的连接性能：不参与连接的结点可以事先判断出来并利用b树跳过，连接的两个列表最多都只需扫描一次，而且连结结果按照文档序有序。 - 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，本文还总结了几种基于r树索引的空间连接算法及其代价评估模型，利用动态编程算法给出了查询优化的算法框架，并在sadbs中集成了基本的r树索引方法和查询优化机制。 - 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
本文对飞机飞行安全状态实时监控系统的工作原理、实时数据库的关键技术( tplus树索引)和飞机飞行实时监控系统的实现等,进行了详细的探讨。由于译码模块是该系统的核心模块之一,同时本文也介绍了一种高效的可扩展的qar数据译码平台的设计和实现,以及后台数据库的设计和应用。同时本文也介绍了高效的数据导入的方法以及数据库的性能优化。 - 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
主要内容包括：建立了绿色营销绩效评价的网状和树形指标体系；提出了绩优度、发展度、协调度和持续度等新概念；描述了绿色营销的综合指标和基础性指标；剖析了各种指标间的逻辑联系；研究了基于网状结构和树形结构评价指标体系的集成评价模型、评价步骤和评价思路；提出绿色营销的发展绩效、持续绩效和协调绩效的评价方法和模型。 - In the first place , the paper briefly discusses issues related to the main index mechanisms in spatial and temporal , studies the access methods of spatio - temporal databases which has been presented . furthermore , the paper explains the storage mechanisms in stadbs ( spatio - temporal analysis database system ) and presents a hr - tree index structure based on main memory to realize the index mechanism of stadbs , it ' s main technologies were discussed in detail . lastly , a visual demo of hr - tree based on main memory was introduced in this paper
本文在分析讨论了主要的空间和时间索引技术的基础上，研究、分析了时空数据的存取方法，对已提出的时空索引技术进行了分类、比较；根据时空分析数据库stadbs存储机制的特点，采用基于主存的hr -树作为stadbs时空数据的索引结构，设计与实现了stadbs的时空存取方法，论文对stadbs时空索引机制的设计与实现作了较详细的介绍，同时阐述了基于主存的hr -树可视化演示程序的主要实现方法。 - 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
数据模型方面，在对常见的数据模型进行描述和分析的基础上，提出了满足海量数据高效存储和管理的gde数据模型，通过实验对数据的存放方式和效率进行了测试；数据索引方面，归纳总结了当前提出的较为先进的几种数据索引方法，尤其是着重分析了基于数据库的数据索引的特点，并对gde基于数据库的可排序四叉树索引进行了重点阐述；地理数据管理方面，对数据并发访问、数据查询、数据更新与维护、数据传输以及数据缓存等关键技术进行了阐述和实践；地理数据访问对象方面，介绍了采用面向对象技术设计实现的地理数据访问类。