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This is a list of file signatures, data used to identify or verify the content of a file. Such signatures are also known as magic numbers or Magic Bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.
The Internet Archive is an American nonprofit digital library founded in 1996 by Brewster Kahle. [1] [2] [4] It provides free access to collections of digitized materials including websites, software applications, music, audiovisual and print materials. The Archive also advocates for a free and open Internet.
- Introduction
- Definition
- Imbalanced Data
- F-Measure
- Limitations as Goals
- See Also
- External Links
In a classification task, the precision for a class is the number of true positives (i.e. the number of items correctly labelled as belonging to the positive class) divided by the total number of elements labelled as belonging to the positive class (i.e. the sum of true positives and false positives, which are items incorrectly labelled as belongin...
For classification tasks, the terms true positives, true negatives, false positives, and false negatives (see Type I and type II errors for definitions) compare the results of the classifier under test with trusted external judgments. The terms positive and negative refer to the classifier's prediction (sometimes known as the expectation), and the ...
Accuracy can be a misleading metric for imbalanced data sets. Consider a sample with 95 negative and 5 positive values. Classifying all values as negative in this case gives 0.95 accuracy score. There are many metrics that don't suffer from this problem. For example, balanced accuracy(bACC) normalizes true positive and true negative predictions by ...
A measure that combines precision and recall is the harmonic meanof precision and recall, the traditional F-measure or balanced F-score: This measure is approximately the average of the two when they are close, and is more generally the harmonic mean, which, for the case of two numbers, coincides with the square of the geometric mean divided by the...
There are other parameters and strategies for performance metric of information retrieval system, such as the area under the ROC curve (AUC) or pseudo-R-squared.
Operation Paperclip. Kurt H. Debus, a former V-2 rocket scientist who became a NASA director, sitting between U.S. President John F. Kennedy and U.S. Vice President Lyndon B. Johnson in 1962 at a briefing at Blockhouse 34, Cape Canaveral Missile Test Annex.
Google Search (also known simply as Google or Google.com) is a search engine operated by Google. It allows users to search for information on the Internet by entering keywords or phrases. Google Search uses algorithms to analyze and rank websites based on their relevance to the search query. It is the most popular search engine worldwide.
localhost. In computer networking, localhost is a hostname that refers to the current computer used to access it. The name localhost is reserved for loopback purposes. [1] . It is used to access the network services that are running on the host via the loopback network interface.
The YES stroke alphabetical order, also called YES stroke-order sorting, briefly YES order or YES sorting, is a Chinese character sorting method based on a stroke alphabet and stroke orders. It is a simplified stroke-based sorting method free of stroke counting and grouping. [1] [2] [3] YES order has been applied to the indexing of Xinhua ...
