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The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...
It disregards word order (and thus most of syntax or grammar) but captures multiplicity. The bag-of-words model is commonly used in methods of document classification where, for example, the (frequency of) occurrence of each word is used as a feature for training a classifier. [1] It has also been used for computer vision. [2]
Frequency analysis has been described in fiction. Edgar Allan Poe's "The Gold-Bug" and Sir Arthur Conan Doyle's Sherlock Holmes tale "The Adventure of the Dancing Men" are examples of stories which describe the use of frequency analysis to attack simple substitution ciphers. The cipher in the Poe story is encrusted with several deception ...
Word2vec can use either of two model architectures to produce these distributed representations of words: continuous bag of words (CBOW) or continuously sliding skip-gram. In both architectures, word2vec considers both individual words and a sliding context window as it iterates over the corpus.
A more complex example is the lexer hack in C, where the token class of a sequence of characters cannot be determined until the semantic analysis phase since typedef names and variable names are lexically identical but constitute different token classes. Thus in the hack, the lexer calls the semantic analyzer (say, symbol table) and checks if ...
Some sources distinguish "diacritical marks" (marks upon standard letters in the A–Z 26-letter alphabet) from "special characters" (letters not marked but radically modified from the standard 26-letter alphabet) such as Old English and Icelandic eth (Ð, ð) and thorn (uppercase Þ, lowercase þ), and ligatures such as Latin and Anglo-Saxon Æ (minuscule: æ), and German eszett (ß; final ...
In natural language processing and information retrieval, explicit semantic analysis (ESA) is a vectoral representation of text (individual words or entire documents) ...
Stock characters from Commedia dell'Arte — which gave each character a standard costume, so easily identifiable — continued across many types of theater, dramatic storytelling, and fiction. A stock character is a dramatic or literary character representing a generic type in a conventional, simplified manner and recurring in many fictional ...