join vt. 1.接合,连接,使结合。 2.参加,加入,作(团体等的)成员;和(某人)作伴。 3.回(原岗位),归(队)。 4.联合;使结交,使联姻。 5.会合,合流。 6.〔口语〕毗连,接近。 join two points by a straight line 用直线把两点连起来。 J- us in a walk. 和我们一起走走。 join battle 参战。 join the army 参军。 join the Party 入党。 join sb. in the discussion 同某人一起讨论。 join one's ship 回到船上。 The brook joins the river. 小川同河流汇合。 His house joins mine. 他的家就在我家的隔壁。 vi. 1.结合,联合 (with; to)。 2.参加,加入 (in; with)。 3.毗连,接近。 My mother joins with me in congratulating you. 我的母亲跟我一道向你祝贺。 In this point I join with you. 这一点我跟你一致。 join in a conversation 参加谈话。 join forces with 1. 军队会师。 2. 同…合作,同…联合。 join hands with 1. 同…联合。 2. 同…合伙开店。 3. 同…做夫妻。 join issue 【法律】共同起诉;进行辩论。 join [take] issue with sb. on sth. 就某事与某人争论。 join the colours 服兵役。 join the (great 或 silent) majority 死。 join up 〔口语〕 1. 参军,入伍。 2. 联合起来。 n. 1.连接;结合。 2.接合处,接合点,接合线,接合面。 You can hardly see the join in the coat. 你几乎看不出那件外衣的接缝。
The classical r - tree as index is adopted in spatial joining . r - tree is performed by bulk loading 在空间连接处理的算法上采用了经典的r树作为索引,采用批生成算法生成r树。
We summarize that spatial index system should provides three kinds of spatial query , they are , spatial range query , nearest neighbor query , spatial join query 本文总结出空间索引系统应提供的三类空间查询:空间范围查询、最近邻居查询、空间连接查询。
This thesis discusses spatial data index first , shows the history of spatial index structure , introduces the current domestic and foreign main index structure in gis ' s spatial joining , and then makes use of character to express spatial object 本论文首先对空间数据库的索引进行探讨,并给出了空间索引结构的发展演化图,然后介绍了目前国内外gis的空间连接过程中的主流索引结构,最后引入了字符来表达空间对象。
Third , the dissertation specifies the spatial join query processing based on service oriented architecture . two strategies are proposed . the first one , called the ssji strategy , can efficiently reduce the overall costs by precomputing and materializing the spatial semi join results 最后,论文研究了空间数据服务发现问题,基于信息检索理论,提出了基于集合模型和向量模型的服务发现方法,提高了服务发现的查全率和查准率。
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。
Given a query window , spatial range query finds all spatial objects that might conform to certain spatial relationship with the query window . nearest neighbor query finds spatial object nearest to given point . spatial join query always involves two or more than two map layers 空间范围查询在某图层内找出与给定查询窗口满足一定空间关系的所有空间对象;最近邻居查询在某图层内找出距离某点最近的空间对象;空间连接查询往往涉及对两个或两个以上图层中空间对象之间的操作。