simple search engine

Today, the search engine is over and opening up the future. To clarify the third law, let's first review the first and second law.■ Law 1 correlation lawIt sounds like an academic paper. Even the first and second laws have never been mentioned before, but first, the content of the second law has already been recognized by the industry and academia. In fact, this first law has been widely studied by acad

The recall rate is the ratio of the number of retrieved documents to the number of relevant documents in the document library. It measures the query completion rate of the retrieval system (search engine; accuracy is the ratio of the number of retrieved documents to the total number of retrieved documents. It measures the precision of the retrieval system (search

Question 1: When a site has been logged into the major search engines, and the location is good, after a period of time need to re-register it? If yes, how long should it be better? In general, we do not need to re-register, unless the site's ranking in the engine dropped or your site has a relatively large update. For some minor updates, you do not have to re-register because most of the engines that use t

main search Engine Googlehttp://www.google.com/intl/zh-CN/Google's mission is to provide you with the best online search services to facilitate the exchange of global information. Google has developed the world's largest search engine, providing the most convenient online in

With the "eye-catching economy" sweeping across the Internet, thousands of dollars are rapidly flowing to the most eye-catching search engine market. A large number of surveys show that the search engine market is in a period of rapid development and has become one of the most promising industries in the next

In traditional information retrieval, the basic index of the system: Recall (Recall) and precision ratio (pricision), recall is the number of related documents retrieved and the ratio of all relevant documents in the document library; The precision ratio is the percentage of the number of related documents retrieved and the total number of documents retrieved. For a retrieval system, recall rate and accuracy can not be the same: high recall rate, low precision, high precision, low recall. For

Major search engine website logon portals | common search engine website logon Portals Google website logon PortalBaidu website logon PortalYahoo website logon PortalLive website logon PortalDmoz website logon PortalCoodir website directory logon PortalAlexa website logon PortalSogou website recordingChinese

Main news search engine Baidu News Searchhttp://news.baidu.com/Baidu News is currently the world's largest Chinese news search platform, published daily 80000--100000 News, news sources including more than 500 authoritative sites, hot news by the news source site and the media every day "democratic vote" elected, does not contain any artificial editorial componen

No. 365, Python distributed crawler build search engine Scrapy explaining-elasticsearch (search engine) queryElasticsearch (search engine) queryElasticsearch is a very powerful search

Before we uncover those big search engine rules, we want to say that the value of information varies from person to man and may be important to a class of people who may be worthless to another. 　 We have a friend who keeps a few good dogs in his home. Once, we talked about how to make these dogs make money for their owners. We advise him to be a dog's website, which can include dog common sense, dog anecdo

In the early days of Internet development, the site is relatively small, information lookup is easier. However, with the explosive development of the Internet, ordinary network users want to find the necessary information is like a needle in a haystack, then to meet the needs of the public information retrieval of professional search site has emerged. The ancestor of the search

No. 362, Python distributed crawler build search engine Scrapy explaining-elasticsearch (search engine) basic index and document CRUD operationsElasticsearch (search engine) basic index and document CRUD operationsthat is, basic i

Robots.txt and Robots META tagsAs we know, search engines all have their own "search ROBOTS" and use these ROBOTS to link on the web page over the network (generally http and src links) constantly crawl data to build your own database.For website administrators and content providers, there are sometimes some website content that they do not want to be crawled by ROBOTS. To solve this problem, The

Robots.txt and Robots META tagsPing Wensheng 2003-10-29As we know, search engines all have their own "search ROBOTS" and use these ROBOTS to link on the web page over the network (generally http and src links) constantly crawl data to build your own database.For website administrators and content providers, there are sometimes some website content that they do not want to be crawled by ROBOTS. To

Php record the implementation code of Search Engine crawling record, php Search Engine The complete code is as follows: // Record search engine crawling records $ searchbot = get_naps_bot (); if ($ searchbot) {$ tlc_thispage = add

by BOOL # with BOOL including must should must_not filter to complete the # format as follows: #bool: {# "filter": [], the filter of the field, Do not participate in the scoring # "must": [], if there are multiple queries, must meet "and" # " should": [], if there are multiple queries, satisfy one or more of the matching "or" # "Must_not": [], on the contrary, the query word is not satisfied with the match "inverse, non-" #} #获取tags字段值为空或者为null的数据, if the dat

Have you ever thought about the biggest misconceptions people have about search engine optimization (SEO)? I have identified 10 of the most popular, but again and again the wrong point of view to introduce you. This is a must read for those who are looking to hire SEO companies or prepare to do SEO for themselves. Myth # 1: All meta tags are equally important. Some meta tags (meta tags) are really useful, b

Abstract: The competition for search engines in China has reached a fierce level. In addition to Baidu, Google, Sogou, and Yahoo have not yet formed a stable position. In the past 2006, the search engine industry was sometimes the most chaotic year. Yahoo is struggling to cope with the troubles and personnel shocks caused by rogue software; Baidu temporarily igno

Copy the Code code as follows: /*Search Google "Shenzhen photography studio", Lan Horizon LANSJ ranking position; 2009-10-11Lost63.com OriginalSearch in the first 30 pages*/$page = 30; Number of pages$domain = "lansj.com"; Domain name$domain = "lost63.com";for ($n =0; $n $url = ' http://www.google.cn/search?hl=zh-CNnewwindow=1q=%E6%B7%B1%E5%9C%B3%E6%91%84%E5%BD%B1%E5%B7%A5 %e4%bd%9c%e5%ae%a4start= '. $

In most cases, logging on to a search engine is not the only way to advertise and promote your site. To achieve real success, you need to use a lot of other techniques and methods. However, when you properly log on to the search engine, you can also bring a lot of traffic to your site, and you hardly need to spend anyt