Atom - An atom is a basic logical formula that is not built by combining simpler formulas with logical connectives or quantifiers.
Atomic data types - Atomic data types are types whose values are treated as individual units by a particular data model or type system, rather than as collections or records...
Atomic representation - An atomic representation describes each state as a single indivisible unit for the reasoning method using it.
Atomic sentence - An atomic sentence is a basic statement in a formal logical language that is not built by combining other statements with logical connectives or quantifiers.
Atomicity (database systems) - Atomicity in database systems is the property that a transaction's covered changes succeed as one unit or are discarded as one unit.
ATRANS - ATRANS is a primitive action in Roger Schank's conceptual dependency approach to representing language meaning.
Attachment ambiguity - Attachment ambiguity occurs when a phrase or other constituent can connect to more than one place in a sentence's grammatical structure.
Attack - An attack is a deliberate attempt to compromise a system, its information or its operation.
Attention - Attention is a neural-network mechanism that combines information using weights that depend on the current input or processing context.
Attention coverage mechanism - An attention coverage mechanism keeps a record of how much attention source positions have already received and uses that record during later decoding.
Attention head - An attention head is one attention computation within a multi-head attention mechanism.
Attention mask - An attention mask specifies which positions may participate in an attention calculation.
Attenuation - Attenuation is a weakening of an observed signal or statistical relationship.
Attribute-based access control - Attribute-based access control, or ABAC, is an approach to authorization that evaluates attributes of the requester, the resource, the requested operation...
Attribute-based extraction - Attribute-based extraction is the identification of selected properties, such as price, date or color, in source material and their conversion into...
Attribute Preservation Property - The attribute preservation property requires the relation schemas in a decomposition to contain, collectively, every attribute of the original relation schema.
Attribute sampling - Attribute sampling is a decision-tree training technique that randomly selects a subset of input features to consider when choosing a split.
Attribute - value system - An attribute - value system represents a collection of objects through named attributes and their values.
Attributional calculus - Attributional calculus is a logic and knowledge-representation language developed by Ryszard S.
AUC (Area under the ROC curve) - AUC, when specified as area under the ROC curve, summarizes how well prediction scores separate positive from negative examples across decision thresholds.
Auction algorithm - The auction algorithm is an optimization method that solves assignment problems through a sequence of bids and price updates.
Audio codec - An audio codec is a method, together with an implementation of that method, for encoding and decoding digital audio.
Audio inpainting - Audio inpainting is the reconstruction of missing or damaged parts of an audio signal using information from the available recording and a model of...
Audio mining - Definition: Audio mining is the computational search and analysis of audio collections to find useful content, events or patterns.
Audio-visual speech recognition - Definition: Audio-visual speech recognition, or AVSR, identifies spoken words using both the acoustic signal and visual evidence of speech production...
Audit log - An audit log is a record of selected system events and activities that provides evidence for later review.
Augmentation Rule - The augmentation rule is a basic inference rule for functional dependencies in relational database theory.
Augmented grammar - An augmented grammar is a grammar extended with information or conditions beyond simple phrase-building rules.
Augmented inverse probability weighting - Augmented inverse probability weighting, or AIPW, is a causal estimation approach that combines outcome predictions with corrections weighted by treatment...
Augmented Lagrangian - An augmented Lagrangian is an optimization function that combines the original objective, multiplier terms for constraints and an additional penalty for...
Augmented reality - Augmented reality, or AR, overlays computer-generated images, text or information onto a live view of the real world, usually through a phone, tablet or...
Aumann's agreement theorem - Aumann's agreement theorem states that two Bayesian agents with a common prior must assign the same posterior probability to an event if those posterior...
Authenticity - Authenticity is the property of being genuine with respect to a stated origin or identity.
Author name disambiguation - Author name disambiguation identifies which author mentions in publication records refer to the same person.
Authority - In link analysis, an authority is a page or node that receives strong endorsement through incoming links from useful hub nodes.
Authorship attribution - Authorship attribution is the task of estimating who wrote a text by comparing it with writing associated with candidate authors.
Auto-regressive model - An auto-regressive model predicts or models the next element of a sequence using earlier elements of that sequence.
Autocommit - Autocommit is a database connection or session mode in which successful statements are normally committed automatically, without the application separately...
Autocorrelated errors - Autocorrelated errors are model errors that are correlated with errors at other times or ordered positions.
Autocorrelation - Autocorrelation is the correlation between a variable and a time-shifted version of itself.
Autocorrelation function - The autocorrelation function, or ACF, gives a time series' autocorrelation across different lags.
Autoencoder - An autoencoder is a neural network trained to reconstruct an input from an internal representation of that input.
Autognostics - Autognostics is an uncommon term used in discussions of autonomic networking for a network's ability to monitor and diagnose its own condition and use that...
Autologistic actor attribute models - Autologistic actor attribute models, or ALAAMs, are statistical models for binary attributes of actors connected by a network.
Automated decision-making - Automated decision-making uses a computer system to determine an action or outcome according to rules, model outputs, or both.
Automated essay scoring - Definition: Automated essay scoring, or AES, uses computational methods to estimate scores for written essays according to an assessment framework.
Automated negotiation - Automated negotiation is a process in which software agents exchange, assess or revise proposals to seek an agreement under defined rules.