Pagerank - pro - an improved page rank algorithm 一种改进的网页排序算法
Ranking algorithm based on decision tree 基于决策树的排序学习算法
The focus of successive research is concentrated on the reduced - rank algorithms and many reduced - rank methods have been proposed 人们在降维算法的研究上做了大量的工作,提出了很多种方法,也发表了大量的文章。
Some contingency screening and ranking algorithms for voltage security analysis are reviewed . based on that , a new method is proposed 论述了几种主要故障选择和筛选的算法,在此基础上进行了改进,提出了一种新的算法。
The goal of web information retrieval is to find all web pages for a user query in a collection of web pages and the task of ranking algorithm is evaluating related web pages for users Web信息检索的目的是在网页集合中找到与用户查询相关的所有网页,而网页评估算法将对这些网页进行评估后显示给用户。
It can dynamically determine the structure information need to index according to real query loads and opti mization of index . second , to consider the effects of structural information on result relevance ranking , this dissertation proposes a ranking algorithm that consider both the frequency distribution and structural distribution of keywords in the result , and a dynamic element - oriented method to compute the weight of keywords 第二,为考虑xml数据中的结构信息对查询结果相关度值的影响,本文提出了一种综合考虑关键字频率分布特征和结构分布特征的查询结果相关度算法,以及一种基于节点的关键字权重计算法,取得了更优的检索性能。
First , a locating and ranking algorithm , based on theory of constraints ( toc ) , is put forward . then , other methods aimed at different traffic measures of effectiveness are respectively advanced , which are the capacity method , delay method , speed method , investigation vehicle method , queue length method and density method respectively 文章首先提出了基于约束理论( toc )的瓶颈定位与排序方法,然后针对具体的指标提出了通行能力法、延误法、速度法、调查车法、车辆排队长度法、密度法等六种方法。
To manage large - scale xml documents with complicated structure , this dissertation focus on the efficient structural indexing algorithm for xml data , result size estimation problem for xml structure based query optimization , result relevance ranking algorithm , and infrastructure for xml query processing for both text - rich and data - rich xml documents . to address the aforementioned issues , this dissertation makes the following contributions . first , it investigates the drawbacks of existing indexing algorithm for xml data , and propose a dynamic indexing algorithm for xml data based on d - bisimilarity , difx 为满足结构复杂、大规模的xml数据管理需要,本文深入研究了xml信息检索系统中的结构索引算法设计和结构化查询优化中的查询代价估计问题,以及查询结果和查询条件间的相关度算法,主要取得了4个方面的成果:第一,分析了已有的xml数据索引算法中存在的问题,提出了一种高效的动态xml结构索引算法difx ,它采用动态后向结构相似性( d - bisimilarity )的概念,可以根据实际查询需求以及索引最优化的要求动态决定索引中保存的结构信息。