Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… … Wikipedia
substitution — 1. In chemistry, the replacement of an atom or group in a compound by another atom or group ( e.g., s. of H by Cl in CH4 to give CH3Cl). 2. In psychoanalysis, an unconscious defense … Medical dictionary
Sensory substitution — means to transform the characteristics of one sensory modality into stimuli of another sensory modality. It is hoped that sensory substitution systems can help handicapped people by restoring their ability to perceive a certain defective sensory… … Wikipedia
Digit symbol substitution test — DSST is a neuropsychological test sensitive to brain damage, dementia, age and depression. It isn’t sensitive to the location of brain damage (except for damage comprising part of the visual field)[1]. It consists of (e.g. nine) digit symbol… … Wikipedia
Command substitution — In computing, command substitution is a facility originally introduced in the Unix shells that allows a command to be run and its output to be pasted back on the command line as arguments to another command. Shells typically do this by creating a … Wikipedia
animal learning — ▪ zoology Introduction the alternation of behaviour as a result of individual experience. When an organism can perceive and change its behaviour, it is said to learn. That animals can learn seems to go without saying. The cat that… … Universalium
distance learning — n. any system of individualized, esp. postsecondary instruction for students at a distance from a campus, utilizing the Internet, videoconferencing, preprogrammed courses, etc. * * * ▪ education Introduction also called distance education , e… … Universalium
Natural language understanding — Learning to read by Sigurður málari, 19th century. Natural language understanding is a subtopic of natural language processing in artificial intelligence that deals with machine reading comprehension. The proc … Wikipedia
Word-sense disambiguation — Disambiguation redirects here. For other uses, see Disambiguation (disambiguation). In computational linguistics, word sense disambiguation (WSD) is an open problem of natural language processing, which governs the process of identifying which… … Wikipedia
Разрешение лексической многозначности — Необходимо проверить качество перевода и привести статью в соответствие со стилистическими правилами Википедии. Вы можете помочь … Википедия
Japanese cryptology from the 1500s to Meiji — The cipher system that Uesugi used is basically a simple substitution usually known as a Polybius square or “checkerboard.” The i ro ha alphabet contains forty eight letters, so a seven by seven square is used, with one of the cells left blank.… … Wikipedia