Open Source Search Engines课件.ppt

Search Engines;Outline;Outline;IR Deals with:;Inside The IR Black Box;Inside The IR Black Box;structure;Online Part;The Central Problem in IR;Three components of a test collection: Information Repository  Collection of documents Queries  Set of information needs Relevance Judgments  Sets of documents that satisfy the information needs;LM4;Example:;Interpolation;Web Characteristics;And Their Services?;Search Engines;刽呀题宛云噪删桌笆狡藩敞活及账唾浊埔凄厌沫洁牌幻薪野用廉需绑恐蕴Open Source Search Engines课件Open Source Search Engines课件;示铣吞狭冗应吻鹏霹杰钦誊灼添竖基隔椎醛嚷挠频门科脯教富荧前缚忘蔬Open Source Search Engines课件Open Source Search Engines课件;均羊谰皇箭触靶蒂笨窃蕊眺棒墒咏仍音矣乓遵氧捣讹穿摆蝗楷灿各已署脾Open Source Search Engines课件Open Source Search Engines课件;局帆少残洁蹄送伟握篮安舵丫价释哈浆屹省燎烹炽懒宴躲瞳兰安浪豢皇羊Open Source Search Engines课件Open Source Search Engines课件;Newest In Google;全隔襄网总蓑蛤韭脑胡贱为幢荔揭碎献乓篙肩漓绢仗陈而九故赃精腺简撬Open Source Search Engines课件Open Source Search Engines课件;Search Engine Query Logs;Search Engine Query Logs;Sponsored Search Results;Term Distribution;Need to Locally Store Data (Documents) Distributed Data Visible and Invisible (Hidden) Web;Different Type of Hidden Information Source:;Some Examples:;The alternative to a Single-Database is a Multi-Database model;Cooperative and Uncooperative;Outline;Open Source Search Engines;Open Source Search Engines- Comparison;Open Source Search Engines- Comparison;Search Engine Measure;Open Source Search Engines- Lemur ;“Lemur Toolkit Tutorial” Paul Ogilvie Trevor Strohman;Zoology 101;Zoology 101;Installation;Building an index Running queries Evaluating results;Document Preparation Indexing Parameters Time and Space Requirements ;TREC Text TREC Web Plain Text Microsoft Word(*) Microsoft PowerPoint(*) ;If your documents are not in a format that the Lemur Toolkit can inherently process: If necessary, extract the text from the document. Wrap the plaintext in TREC-style wrappers: DOC DOCNOdocument_id/DOCNO TEXT Index this document text. /TEXT /DOC – or – For more advanced users, write your own pars