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An extension of word vectors for creating a dense vector representation of unstructured radiology reports has been proposed by Banerjee et al. [23] One of the biggest challenges with Word2vec is how to handle unknown or out-of-vocabulary (OOV) words and morphologically similar words. If the Word2vec model has not encountered a particular word ...
Given a presentation it is possible to add a new generator that is expressed as a word in the original generators. Starting with G = 〈 x | x 3 = 1 〉 and letting y = x 2 the new presentation G = 〈 x,y | x 3 = 1, y = x 2 〉 defines the same group.
Regular languages are a category of languages (sometimes termed Chomsky Type 3) which can be matched by a state machine (more specifically, by a deterministic finite automaton or a nondeterministic finite automaton) constructed from a regular expression.
The words in a lexicon (the set of words used in some language) have a conventional ordering, used in dictionaries and encyclopedias, that depends on the underlying ordering of the alphabet of symbols used to build the words. The lexicographical order is one way of formalizing word order given the order of the underlying symbols.
The system is similar to a well-known trick of some stage mnemonists employed for memorizing huge lists of words suggested by spectators to repeat them in any given order, forwards, backwards, even ones, etc., known as mnemonic peg system. A mnemonist has his own "counting list" of words.
This is necessary in order to avoid information loss in the case where numbers may also be valid identifiers. Tokens are identified based on the specific rules of the lexer. Some methods used to identify tokens include regular expressions , specific sequences of characters termed a flag , specific separating characters called delimiters , and ...
Thus words will only appear when other words can be made from the same letters. Anagram dictionaries were formerly produced by hand, but can now be trivially generated from any machine-readable word list by computer by sorting words in order of their sorted letter-strings.
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