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The value computed with the CG function is unaffected by changes in the ordering of search results. That is, moving a highly relevant document above a higher ranked, less relevant, document does not change the computed value for CG (assuming ,). Based on the two assumptions made above about the usefulness of search results, (N)DCG is usually ...
Sum; Others include: Nanmean (mean ignoring NaN values, also known as "nil" or "null") Stddev; Formally, an aggregate function takes as input a set, a multiset (bag), or a list from some input domain I and outputs an element of an output domain O. [1] The input and output domains may be the same, such as for SUM, or may be different, such as ...
MongoDB, Inc. is an American software company that develops and provides commercial support for the source-available database engine MongoDB, a NoSQL database that stores data in JSON-like documents with flexible schemas. MongoDB, Inc. is a member of the MACH Alliance. [2]
Kim Kardashian is having a picture-perfect holiday season! On Monday, Dec. 30, the SKIMS founder, 44, shared a selection of sweet images from her festive family time.. Among them were several ...
New York City woke up to its first white Christmas in 15 years. But only a few areas of the U.S. are likely to see snow in the weather forecast for Christmas 2024.
This story was updated to reflect the Wizards' last win.. Losing has become an epidemic for some of the bottom-dwellers in the NBA. Just last year, the Detroit Pistons tied the NBA record for most ...
MongoDB is a source-available, cross-platform, document-oriented database program. Classified as a NoSQL database product, MongoDB utilizes JSON -like documents with optional schemas . Released in February 2009 by 10gen (now MongoDB Inc. ), it supports features like sharding , replication , and ACID transactions (from version 4.0).
A document-oriented database is a specialized key-value store, which itself is another NoSQL database category. In a simple key-value store, the document content is opaque. A document-oriented database provides APIs or a query/update language that exposes the ability to query or update based on the internal structure in the document. This ...