bbb search engine

I have been engaged in search engine related work has been 11 years, today with you talk about search engine core algorithm: Natural language and Boolean search. The discussion leads to the following conclusion: Search crawler and

Label:Project Objective: Oschina a simple package framework for full-text search License:public Domain Content included: Rebuild Index Tool, Indexrebuilder.java Incremental build Index tool, Indexupdater.java Full-Text Search framework Http://git.oschina.net/oschina/search-framework Tngoudb backgroundTngoudb is a Chinese

and recall rate can be considered. Literally, it seems that there is still a spectrum of accuracy, but how can we explain the recall rate?Accuracy and recall rateSometimes, accuracy is also called accuracy. For example, a database contains 500 documents, 50 of which comply with the definition. The system has retrieved 75 documents, but only 45 of them comply with the definition. Recall rate R = 45/50 = 90% Precision P = 45/75 = 60% In this example, the system

year 3 month ( Friday )Yin, South Wind, the sky is still no sun.The progress of the project is like the weather, quicker. The meeting of the search engine was finished. At the end of the meeting, it was announced that the development of the engine project last year ended in failure. There is no thought, no planning, no plan, and the failure of the project is ine

Project Objective: Oschina a simple package framework for full-text searchLicense:public DomainContent included: Rebuild Index Tool, Indexrebuilder.java Incremental build Index tool, Indexupdater.java Full-Text Search framework Http://git.oschina.net/oschina/search-frameworkTngoudbBackgroundTngoudb is a Chinese search

Blog search engine listing | a brief comparison of blog search engines Today, I suddenly wanted to use the "blog search engine", so I found this article for translation. O (partition _ partition) o... Features (Fast pushing new articles): The purpose of the blog

To facilitate query information, the search engines also provide additional search features (some can be selected in the search engine's Advanced Search Advanced page). Like what: Word Derivation form Query When input "thought", if this feature is selected, search

asp.net|server|sql|web| Full-text Search | search engine 1 Introduction 21st century, China's Internet search engine domain can be described as crowded, Baidu, Yahoo, search, Sogou and so on have resorted to the attention of netiz

=preg_match ("/\b{$search _5}\b/", $url); $bing =preg_match ("/\b{$search _6}\b/", $url); $youdao =preg_match ("/\b{$search _7}\b/", $url); $s _s_keyword= ""; $bul =$_server[' Http_referer ']; Get the no parameter domain name Preg_match (' @^ (?:/HTTP//)? ( [^/]+) @i ', $bul, $matches); $burl = $matches [1]; Match Domain n

The following uses the C # language as an example:Using System; Using System. Collections. Generic; Using System. Text; Using System. Text. RegularExpressions; Namespace Util{Public class SearchKeyword{Public SearchKeyword (){} // Search Engine FeaturesPrivate string [] [] _ Enginers = new string [] []{New string [] {"google", "utf8", "q "},New string [] {"baidu", "gb2312", "wd "},New string [] {"yahoo", "u

Search market, expand the territory of the people, competition between each other to rise to "white-hot." This is because search has become the second largest application of the Internet, and is called "the cornerstone of E-commerce", "the strategic core of the Internet", and Google's fame and fortune demonstration effect, but also exacerbated the fanatical chase. If the world is divided up, the story of th

PreviousAs soon as we entered the scientific research circle, we ushered in the software engineering project, which lasted for nearly three months. The Team Project composed of five members for nearly two months is indeed not a trivial matter, it is very difficult to determine a project that is practical, innovative, and suitable for the team. At present, Microsoft academic search and Bing search

10 tips to know about using Google The content of this article is taken from IMOOC WebTo find the ladder of the small partner, this technique Baidu search engine I have not tried There are a lot of times, in the use of search engines, search results are not satisfactory, below I introduce a few

Functions of php to obtain the source of search engine keywords (support for Baidu, Google, and other search engines) // Obtain the keyword from the search engine inbound // By bbs.it-home.org Function get_keyword ($ url, $ k

Search engine work process is very complex, we simply introduced how the search engine is to achieve the page rank. The introduction here is relative to the real search engine technology is only fur, but for SEO personnel is enoug

Basic search skills1. Search with logical wordsLarge search engines support the use of logical words for more complex search definitions, commonly used: AND (AND), OR (OR), NOT (no, AND some are and not) and NEAR (the closeness of the two words). Apply them appropriately to make the results very accurate. In addition,

Bytes Institute of Computing Technology Li RuiColin719@126.com Summary: This paper briefly introduces the knowledge of meta-search engine, and puts forward a design concept of a meta-search engine system. The system uses a feedback mechanism to learn and adjust the results online. In the system design, the design of th

follows: // Obtain keywords from the search engine Function get_keyword ($ url, $ kw_start) { $ Start = stripos ($ url, $ kw_start ); $ Url = substr ($ url, $ start + strlen ($ kw_start )); $ Start = stripos ($ url ,''); If ($ start> 0) { $ Start = stripos ($ url ,''); $ S_s_keyword = substr ($ url, 0, $ start ); } Else { $ S_s_keyword = substr ($ url, 0 ); } Return $ s_s_keyword; } $ Url = isset ($ _ SE