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A large scale evaluation has been conducted by Google in 2006 [2] to compare the performance of Minhash and Simhash [3] algorithms. In 2007 Google reported using Simhash for duplicate detection for web crawling [4] and using Minhash and LSH for Google News personalization.
The duplication detector is a tool used to compare any two web pages to identify text which has been copied from one to the other. It can compare two Wikipedia pages to one another, two versions of a Wikipedia page to one another, a Wikipedia page (current or old revision) to an external page, or two external pages to one another.
Duplicate content is a term used in the field of search engine optimization to describe content that appears on more than one web page. The duplicate content can be substantial parts of the content within or across domains and can be either exactly duplicate or closely similar. [ 1 ]
freedup is a program to scan directories or file lists for duplicate files. The file lists may be provided to an input pipe or internally generated using find with provided options. There are more options to specify the search conditions more detailed.
Check intensity: How often and for which types of document fragments (paragraphs, sentences, fixed-length word sequences) does the system query external resources, such as search engines. Comparison algorithm type: The algorithms that define the way the system uses to compare documents against each other. [citation needed] Precision and recall
A script was run on an offline copy of the database. First, it isolated all pages with duplicate headers. Then, it sliced each remaining page into three-word "chains" or "triplets" and looked to see how many of these chains appeared more than once. The percentage of repeated chains are reported for each article.
Finding duplicate references by examining reference lists is difficult. There are some tools that can help: AutoWikiBrowser (AWB) will identify and (usually) correct exact duplicates between <ref>...</ref> tags. See the documentation. URL Extractor For Web Pages and Text can identify Web citations with the exact same URL but otherwise possibly ...
Date 1 _or_content: Modification of default rule, suitable if you think you have same files with different dates. Files with same date and size are still considered as same, but in addition files with same size and different dates are compared byte-by-byte to check if they are same. Content: Strict rule, which does binary comparison for all ...