Tree width - Tree width, commonly written treewidth, measures how small the largest bag can be in a valid tree decomposition of a graph, minus one.
Treebank - A treebank is a collection of sentences annotated with syntactic structures.
Trellis quantization - Trellis quantization chooses quantized values by searching paths through a graph of candidate decisions and states.
Trend analysis - Trend analysis examines how the underlying level or direction of a time series changes over a specified period.
Trend chart - A trend chart displays a measured quantity in time or observation order so that changes, recurring patterns and unusual values can be inspected.
Trend series - A trend series is an estimated time series that shows underlying movement after seasonal variation and irregular fluctuations have been reduced.
Trend-stationary process - A trend-stationary process is a time series that becomes stationary after removing a deterministic trend.
Triangle inequality - The triangle inequality says that the distance directly between two points is no greater than the sum of their distances through a third point.
Triangular network coding - Triangular network coding is a packet-coding approach that combines suitably shifted and zero-padded binary payloads using XOR operations.
Trifocal tensor - The trifocal tensor is a mathematical representation of the projective geometry connecting three camera views.
Trigram - A trigram is a sequence of three consecutive units, usually words or characters.
Trigram search - Trigram search retrieves or compares text using overlapping sequences of three characters.
Trimmed samples - Trimmed samples are samples from which a specified portion of the most extreme observations has been excluded for a particular analysis.
Trimmed statistics - Trimmed statistics are numerical summaries calculated after excluding a specified portion of extreme observations.
Triphone - A triphone is a context-dependent representation of a speech sound that includes its immediate left and right phonetic neighbors.
Triplestore - A triplestore is a database designed to store and query statements represented as subject - predicate - object triples, most commonly using RDF.
Triplet loss - Triplet loss is a training objective that encourages an anchor example to be closer to a related positive example than to an unrelated negative example by a...
Trivial Functional Dependency - A trivial functional dependency is a dependency X → Y in which every attribute of Y is already included in X.
Trivial MVD - A trivial multivalued dependency, or trivial MVD, is a multivalued dependency X →→ Y that holds automatically because Y is contained in X, or because X...
True negative - A true negative is an outcome in which a classifier predicts the negative class and the reference label is also negative.
True online TD(lambda) - True online TD(lambda) is a temporal-difference prediction algorithm whose efficient backward-view updates exactly match a specified online forward view for...
True positive - A true positive is an outcome in which a classifier predicts the positive class and the reference label confirms that class.
True positive rate - True positive rate is the proportion of actual positive cases that a classifier correctly identifies as positive. It is also called recall or sensitivity.
Truncated Newton method - A truncated Newton method approximately solves the Newton equations inside each optimization iteration, stopping the inner solve before full accuracy when...
Truncated normal distribution - A truncated normal distribution is the distribution of a normally distributed variable conditional on its value lying within specified bounds.
Truncated singular value decomposition - Truncated singular value decomposition is a low-rank representation of a matrix obtained by retaining only its largest singular values and associated left...
Trust - Trust is a person's confidence that an AI system can be relied upon in a particular situation.
Trust region - A trust region is a neighborhood around the current point within which an optimization algorithm uses a local model to propose a step.
Trust region policy optimization - Trust region policy optimization, or TRPO, is a policy-gradient reinforcement-learning method that seeks an improved policy while limiting how much its...
Trustworthiness - Trustworthiness is the extent to which an AI system merits reliance for a specified purpose, supported by relevant evidence about its behavior, limitations...
Trustworthy AI - Trustworthy AI is AI developed and used in ways that provide justified grounds for reliance in its intended context.
Truth - In logic-based AI, truth concerns whether a statement holds under a specified interpretation or model.
Truth discovery - Truth discovery is a family of data-integration methods that estimates which claims are most likely to be correct when multiple sources provide conflicting...
Truth-revealing - Truth-revealing describes a mechanism whose incentives make accurately reporting private information an appropriate strategy under specified assumptions.
Truth value - A truth value is the value assigned to a statement according to a logic's semantics. In classical two-valued logic, the possible values are true and false.
Tsallis entropy - Tsallis entropy is a parameterized entropy measure defined for probabilities pi by Sq=k(1−Σpiᑫ)/(q−1), for q≠1.
Tsetlin machine - A Tsetlin machine is a learning model that uses teams of Tsetlin automata to construct propositional-logic clauses.
Tucker decomposition - Tucker decomposition represents a multiway array, or tensor, using a smaller core tensor and one factor matrix for each mode.
Tukey - Duckworth test - The Tukey-Duckworth test is a simple two-sample test that uses counts of nonoverlapping observations at opposite ends of the combined data.
Tukey's B method - Tukey's B method is a multiple-comparison procedure for comparing group means that combines features of Tukey's honestly significant difference procedure...
Tukey's HSD test - Tukey's HSD test, short for honestly significant difference, is a procedure for comparing every pair of group means while controlling the familywise...
Tukey's range test - Tukey's range test is a common name for Tukey's honestly significant difference procedure, which compares group means using the studentized range distribution.
Tukey's test of additivity - Tukey's test of additivity is a one-degree-of-freedom test for a particular form of nonadditivity in a two-way layout.
Tukey's trend test - Tukey's trend test is an approach to detecting a dose-response trend by examining regression slopes under several prespecified dose scales, commonly...
Tunstall coding - Tunstall coding is a lossless variable-to-fixed-length coding method.
Tuple - A tuple is one structured combination of values.
Tuple Constraint - A tuple constraint is a data integrity rule that can be evaluated on each tuple, or row, independently of other tuples.
Tuple-oriented approach - A tuple-oriented approach handles database records one tuple or row at a time at the application or interface level.