title: 3-HOP: A High-Compression Indexing Scheme for Reachability Query venue: SIGMOD'09 author: Ruoming Jin, Yang Xiang, Ning Ruan, and David Fuhry abstract: Reachability queries on large directed graphs have attracted much attention recently. The e…

Elasticsearchis a great search engine, flexible, fast and fun. So how can I get started with it? This post will go through how to get contents from a SQL database into Elasticsearch. Elasticsearch has a set of pluggable services called rivers. A rive…

Theano和numpy一样,支持基本的下标取值方法和高级的下标取值方法. 因为theano中没有boolean类型,所以不支持boolean类型的masks. # head file support import numpy as np numpy中的 Advanced Indexing: 高级下标取值用于获取非元组序列对象中的元素时,一般为 bdarray结构. 通常可以使用的取值方法包括:integer 和boolean integer indexing >>> x = np.ar…

DATABASE SYSTEM CONCEPTS, SIXTH EDITION11.1 Basic ConceptsAn index for a file in a database system works in much the same way as the indexin this textbook. If we want to learn about a particular topic (specified by a wordor a phrase) in this textbook,…

Wrong practice: Putting sets into an array indexed by the type's ordinal /** * Added demo for the "Use EnumMap instead of ordinal indexing". */ package com.effectivejava.EnumAnnotations; /** * @author Kaibo * */ public class Herb { public enum T…

1.6.1 什么是 Indexing 1.6.2 Uploading Data with Index Handlers 1.6.3 Uploading Data with Solr Cell using Apache Tika 1.6.4 Uploading Structured Data Store Data with the Data Import Handler 1.6.5 Updating Parts of Documents 1.6.6 De-Duplication(重复数据删除) 1…

1. Detecting Languages During Indexing 在索引的时候,solr可以使用langid UpdateRequestProcessor来识别语言,然后映射文本到特定语言的字段.solr支持这个功能的两个实现: Tika的语言解析功能:http://tika.apache.org/0.10/detection.html LangDetect语言解析:http://code.google.com/p/language-detection/ 可以从 http://blo…

转载:http://quweiprotoss.wap.blog.163.com/ Solr Cell是一个针对Tika的简单适配器,它由一个SAX ContentHandler组成,ContentHandler处理SAX事件,并通过指定要抽取的域产生文档. 在索引二制进文件的时候,有些事要注意: l  你可以提供任何Tika支持的文档类型给Tika,Tika会尝试确定文档正确的MIME类型,然后再调用相应的解析器.如果你已经知道了正确的MIME,你可以在stream.type参数中指定. l  …

When data is stored on disk based storage devices, it is stored as blocks of data. These blocks are accessed in their entirety, making them the atomic disk access operation. Disk blocks are structured in much the same way as linked lists; both contai…

On-Merge With Named Windows 功能:对window中的insert.update.delete操作进行组合运用. 格式: 1  "; 14      15  System.out.println("start Name Window select"); 16  EPOnDemandQueryResult sResult=epRuntime.executeQuery(select); 17  EventBean[] arryBeans =sResult…