PageRank

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PageRank is a crucial computador[2] algorithm[1], developed by Larry Page and Sergey Brin, that measures the relative importance of web pages. This is done by assigning a numerical weight to each page based on the number of links directed to it, effectively using the internet[3]’s vast linking structure as an indicator of an individual page’s value. The algorithm involves a complex process of refining and adjusting these values through repeated iterations. Beyond its application in web search, PageRank has been used in various other fields such as bibliometrics, social networks, and academic ranking systems. However, it’s also worth noting that attempts to manipulate PageRank for higher rankings have led to the development of detection methods to maintain the algorithm’s reliability. Overall, PageRank has significantly shaped the way we navigate and understand the digital world.

Definições de termos
1. algorithm. An algorithm is a well-defined sequence of instructions or rules that provides a solution to a specific problem or task. Originating from ancient civilizations, algorithms have evolved through centuries and are now integral to modern computing. They are designed using techniques such as divide-and-conquer and are evaluated for efficiency using measures like big O notation. Algorithms can be represented in various forms like pseudocode, flowcharts, or programming languages. They are executed by translating them into a language that computers can understand, with the speed of execution dependent on the instruction set used. Algorithms can be classified based on their implementation or design paradigm, and their efficiency can significantly impact processing time. Understanding and using algorithms effectively is crucial in fields like computer science and artificial intelligence.
2. computador. Um computador é um dispositivo sofisticado que manipula dados ou informações de acordo com um conjunto de instruções, conhecidas como programas. Por conceção, os computadores podem executar uma vasta gama de tarefas, desde simples cálculos aritméticos até ao processamento e análise de dados complexos. Os computadores evoluíram ao longo dos anos, desde as primitivas ferramentas de contagem, como o ábaco, até às modernas máquinas digitais. O coração de um computador é a sua unidade central de processamento (CPU), que inclui uma unidade lógica aritmética (ALU) para efetuar operações matemáticas e registos para armazenar dados. Os computadores também têm unidades de memória, como ROM e RAM, para armazenar informação. Outros componentes incluem dispositivos de entrada/saída (E/S) que permitem a interação com a máquina e circuitos integrados que melhoram a funcionalidade do computador. As principais inovações históricas, como a invenção do primeiro computador programável por Charles Babbage e o desenvolvimento do primeiro computador eletrónico digital automático, o Atanasoff-Berry Computer (ABC), contribuíram grandemente para a sua evolução. Atualmente, os computadores alimentam a Internet, ligando milhares de milhões de utilizadores em todo o mundo, e tornaram-se uma ferramenta essencial em quase todas as indústrias.
PageRank (Wikipédia)

PageRank (PR) is an algorithm used by Pesquisa no Google to rank páginas web in their motor de busca 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:

A simple illustration of the Pagerank algorithm. The percentage shows the perceived importance, and the arrows represent hyperlinks.

PageRank works by counting the number and quality of links to a page to determine a rough estimate of how important the website is. The underlying assumption is that more important websites are likely to receive more links from other websites.

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, all patents associated with PageRank have expired.

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