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PageRank
PageRank (PR) is an algorithm used by Google Search to rank webpages, web pages in their search engine results. It is named after both the term "web page" and co-founder Larry Page. PageRank is a way of measuring the importance of website pages. According to Google: Currently, PageRank is not the only algorithm used by Google to order search results, but it is the first algorithm that was used by the company, and it is the best known. As of September 24, 2019, PageRank and all associated patents are expired. Description PageRank is a Network theory#Link analysis, link analysis algorithm and it assigns a numerical weighting to each element of a hyperlinked Set (computer science), set of documents, such as the World Wide Web, with the purpose of "measuring" its relative importance within the set. The algorithm may be applied to any collection of entities with reciprocal link, reciprocal quotations and references. The numerical weight that it assigns to any given element ''E'' is r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Google Search
Google Search (also known simply as Google) is a search engine provided by Google. Handling more than 3.5 billion searches per day, it has a 92% share of the global search engine market. It is also the List of most visited websites, most-visited website in the world. The order of search results returned by Google is based, in part, on a priority rank system called "PageRank". Google Search also provides many different options for customized searches, using symbols to include, exclude, specify or require certain search behavior, and offers specialized interactive experiences, such as flight status and package tracking, weather forecasts, currency, unit, and time conversions, word definitions, and more. The main purpose of Google Search is to search for text in publicly accessible documents offered by web servers, as opposed to other data, such as Image search, images or Database search engine, data contained in databases. It was originally developed in 1996 by Larry Page, Serg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incoming Link
A backlink is a link from some other website (the referrer) to that web resource (the referent). A ''web resource'' may be (for example) a website, web page, or web directory. A backlink is a reference comparable to a citation. The quantity, quality, and relevance of backlinks for a web page are among the factors that search engines like Google evaluate in order to estimate how important the page is. PageRank calculates the score for each web page based on how all the web pages are connected among themselves, and is one of the variables that Google Search uses to determine how high a web page should go in search results. This weighting of backlinks is analogous to citation analysis of books, scholarly papers, and academic journals. A Topical PageRank has been researched and implemented as well, which gives more weight to backlinks coming from the page of a same topic as a target page. Some other words for ''backlink'' are incoming link, inbound link, inlink, inward link, and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Search Engine
A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a line of results, often referred to as search engine results pages (SERPs). When a user enters a query into a search engine, the engine scans its index of web pages to find those that are relevant to the user's query. The results are then ranked by relevancy and displayed to the user. The information may be a mix of links to web pages, images, videos, infographics, articles, research papers, and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories and social bookmarking sites, which are maintained by human editors, search engines also maintain real-time information by running an algorithm on a web crawler. Any internet-based content that can't be indexed and searc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Larry Page
Lawrence Edward Page (born March 26, 1973) is an American business magnate, computer scientist and internet entrepreneur. He is best known for co-founding Google with Sergey Brin. Page was the chief executive officer of Google from 1997 until August 2001 (stepping down in favor of Eric Schmidt) then from April 2011 until July 2015 when he moved to become CEO of Alphabet Inc. (created to deliver "major advancements" as Google's parent company), a post he held until December 4, 2019. He remains an Alphabet board member, employee, and controlling shareholder. Creating Google helped Page build a significant amount of wealth. As of November 2022, Page has an estimated net worth of $84 billion according to the Bloomberg Billionaires Index, making him the ninth-richest person in the world. He has also invested in flying car startups Kitty Hawk and Opener. Page is the co-creator and namesake of PageRank, a search ranking algorithm for Google. He received the Marconi Prize in 2004 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HITS Algorithm
Hyperlink-Induced Topic Search (HITS; also known as hubs and authorities) is a link analysis algorithm that rates Web pages, developed by Jon Kleinberg. The idea behind Hubs and Authorities stemmed from a particular insight into the creation of web pages when the Internet was originally forming; that is, certain web pages, known as hubs, served as large directories that were not actually authoritative in the information that they held, but were used as compilations of a broad catalog of information that led users direct to other authoritative pages. In other words, a good hub represents a page that pointed to many other pages, while a good authority represents a page that is linked by many different hubs. The scheme therefore assigns two scores for each page: its authority, which estimates the value of the content of the page, and its hub value, which estimates the value of its links to other pages. History In journals Many methods have been used to rank the importance of scienti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jon Kleinberg
Jon Michael Kleinberg (born 1971) is an American computer scientist and the Tisch University Professor of Computer Science and Information Science at Cornell University known for his work in algorithms and networks. He is a recipient of the Nevanlinna Prize by the International Mathematical Union. Early life and education Jon Kleinberg was born in 1971 in Boston, Massachusetts to a mathematics professor father and a computer consultant mother. He received a Bachelor of Science degree in computer science from Cornell University in 1993 and a PhD from Massachusetts Institute of Technology in 1996. He is the older brother of fellow Cornell computer scientist Robert Kleinberg. Career Since 1996 Kleinberg has been a professor in the Department of Computer Science at Cornell, as well as a visiting scientist at IBM's Almaden Research Center. His work has been supported by an NSF Career Award, an ONR Young Investigator Award, a MacArthur Foundation Fellowship, a Packard Foundation Fel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RankDex
Baidu, Inc. ( ; , meaning "hundred times") is a Chinese multinational technology company specializing in Internet-related services and products and artificial intelligence (AI), headquartered in Beijing's Haidian District. It is one of the largest AI and Internet companies in the world. The holding company of the group is incorporated in the Cayman Islands. Baidu was incorporated in January 2000 by Robin Li and Eric Xu. The Baidu search engine is currently the sixth largest website in the Alexa Internet rankings. Baidu has origins in RankDex, an earlier search engine developed by Robin Li in 1996, before he founded Baidu in 2000. Baidu offers various services, including a Chinese search engine, as well as a mapping service called Baidu Maps. Baidu offers about 57 search and community services, such as Baidu Baike (an online encyclopedia), Baidu Wangpan (a cloud storage service), and Baidu Tieba (a keyword-based discussion forum). Baidu Global Business Unit (GBU) is responsi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TrustRank
TrustRank is an algorithm that conducts link analysis to separate useful webpages from spam and helps search engine rank pages in SERPs (Search Engine Results Pages). It is semi-automated process which means that it needs some human assistance in order to function properly. Search engines have many different algorithms and ranking factors that they use when measuring the quality of webpages. TrustRank is one of them. Because manual review of the Internet is impractical and very expensive, TrustRank was introduced in order to help achieve this task much faster and cheaper. It was first introduced by researchers Zoltan Gyongyi and Hector Garcia-Molina of Stanford University and Jan Pedersen of Yahoo! in their paper "Combating Web Spam with TrustRank" in 2004. Today, this algorithm is a part of major web search engines like Yahoo! and Google. One of the most important factors that help web search engine determine the quality of a web page when returning results are backlinks. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Webgraph
The webgraph describes the directed links between pages of the World Wide Web. A graph, in general, consists of several vertices, some pairs connected by edges. In a directed graph, edges are directed lines or arcs. The webgraph is a directed graph, whose vertices correspond to the pages of the WWW, and a directed edge connects page X to page Y if there exists a hyperlink on page X, referring to page Y. Properties * The degree distribution of the webgraph strongly differs from the degree distribution of the classical random graph model, the Erdős–Rényi model: in the Erdős–Rényi model, there are very few large degree nodes, relative to the webgraph's degree distribution. The precise distribution is unclear, however: it is relatively well described by a lognormal distribution, as well as the Barabási–Albert model for power laws. * The webgraph is an example of a scale-free network. Applications The webgraph is used for: * computing the PageRank of the WWW-pages; * c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eigenvalue
In linear algebra, an eigenvector () or characteristic vector of a linear transformation is a nonzero vector that changes at most by a scalar factor when that linear transformation is applied to it. The corresponding eigenvalue, often denoted by \lambda, is the factor by which the eigenvector is scaled. Geometrically, an eigenvector, corresponding to a real nonzero eigenvalue, points in a direction in which it is stretched by the transformation and the eigenvalue is the factor by which it is stretched. If the eigenvalue is negative, the direction is reversed. Loosely speaking, in a multidimensional vector space, the eigenvector is not rotated. Formal definition If is a linear transformation from a vector space over a field into itself and is a nonzero vector in , then is an eigenvector of if is a scalar multiple of . This can be written as T(\mathbf) = \lambda \mathbf, where is a scalar in , known as the eigenvalue, characteristic value, or characteristic ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Google Hummingbird
Hummingbird is the codename given to a significant algorithm change in Google Search in 2013. Its name was derived from the speed and accuracy of the hummingbird. The change was announced on September 26, 2013, having already been in use for a month. "Hummingbird" places greater emphasis on natural language queries, considering context and meaning over individual keywords. It also looks deeper at content on individual pages of a website, with improved ability to lead users directly to the most appropriate page rather than just a website's homepage. The upgrade marked the most significant change to Google search in years, with more "human" search interactions and a much heavier focus on conversation and meaning. Thus, web developers and writers were encouraged to optimize their sites with natural writing rather than forced keywords, and make effective use of technical web development for on-site navigation. History Google announced "Hummingbird", a new search algorithm, at a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robin Li
Robin Li Yanhong (; born 17 November 1968) is a Chinese software engineer and billionaire internet entrepreneur. He is the co-founder of the search engine Baidu. As of March 2022, his net worth was estimated at US$8.5 billion. Li studied information management at Peking University and computer science at the University at Buffalo. In 1996, he created RankDex, the first web search engine with page-ranking and site-scoring algorithms."About: RankDex" rankdex.com; accessed 3 May 2014. In 2000, he founded Baidu with Eric Xu. Li has been CEO of Baidu since January 2004. The company was listed on on August 5, 2005. Li was included as one of the ''15 Asian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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