Unsupervised translation - Unsupervised translation is learning to translate between languages without externally supplied, paired bilingual training sentences.
Unsupported-claim rate - Unsupported-claim rate is the proportion of evaluated claims in a response that lack adequate grounding under a defined evidence standard.
Unvoiced sound - An unvoiced sound, also called a voiceless sound, is produced without the regular vocal-fold vibration that supplies voicing.
Up-and-down design - An up-and-down design is a sequential experimental design in which the level used for the next observation depends on the preceding response.
Update Anomalies - Update anomalies are problems that arise when a database's representation of facts makes changes difficult, inconsistent or unintentionally destructive.
Uplift modeling - Uplift modeling estimates how an intervention changes an outcome, often as a function of a person's or item's characteristics.
Upper confidence bound - An upper confidence bound is an upper limit intended to cover an unknown quantity with a specified confidence under stated assumptions.
Upper ontology - An upper ontology is a formal framework of very general categories and relationships intended to support more specialized descriptions across multiple domains.
Upweighting - Upweighting increases the contribution of selected examples to a calculation or learning objective.
URL normalization - URL normalization converts a web address into a consistent representation using rules that preserve its intended meaning.
Usability - Usability describes how well particular users can achieve their goals with a system in a particular setting, considering effectiveness, efficiency, and...
Usability testing - Usability testing evaluates a product by observing relevant users attempting realistic tasks with it.
Use And Interpretation Bias - Use and interpretation bias, in the supplied ontology's interpretive sense, is a systematic distortion in how ambiguous information, situations, or events...
User-centered design - User-centered design is an iterative approach to creating systems around an explicit understanding of the people who will use them, their goals, and their...
User-defined function - A user-defined function, or UDF, is a function supplied by a developer or user to perform a reusable operation beyond the system's existing built-in functions.
User Interaction Bias - User interaction bias arises when people's existing biases or patterned behavior shape their interaction with data, AI outputs, or results.
User matrix - A user matrix is the collection of learned user representations in a matrix-factorization recommendation model.
User modeling - User modeling is the process of building and maintaining a representation of a user's characteristics for a system's purposes.
User profile - A user profile is an organized representation of information associated with a user or user account for an application's purposes.
UTF-8 - UTF-8 is a Unicode encoding that represents each Unicode scalar value using one to four bytes.
Utility - Utility is a numerical representation of how desirable an outcome is to a particular decision-maker or agent.
Utility function - A utility function maps possible outcomes, states, or other objects of preference to numerical values that represent a decision-maker's preferences.
Utility independence - Utility independence is a preference condition in multiattribute decision theory.
Utility nodes - Utility nodes are components of a decision network, or influence diagram, that assign numerical desirability values to combinations of their parent variables.
Utility theory - Utility theory studies how preferences can be represented numerically and used to reason about choices.
Utterance - An utterance is a particular instance or segment of language produced in communication, commonly a stretch of speech by a speaker in context.