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An important type of relation is the subsumption relation (is-a-superclass-of, the converse of is-a, is-a-subtype-of or is-a-subclass-of). This defines which objects are classified by which class. For example, we have already seen that the class Ford Explorer is-a-subclass-of 4-Wheel Drive Car, which in turn is-a-subclass-of Car.
Categorization is a type of cognition involving conceptual differentiation between characteristics of conscious experience, such as objects, events, or ideas.It involves the abstraction and differentiation of aspects of experience by sorting and distinguishing between groupings, through classification or typification [1] [2] on the basis of traits, features, similarities or other criteria that ...
Cluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some specific sense defined by the analyst) to each other than to those in other groups (clusters).
For example, the collective noun "group" can be applied to people ("a group of people"), or dogs ("a group of dogs"), or objects ("a group of stones"). Some collective nouns are specific to one kind of thing, especially terms of venery, which identify groups of specific animals. For example, "pride" as a term of venery always refers to lions ...
A learning object is "a collection of content items, practice items, and assessment items that are combined based on a single learning objective". [1] The term is credited to Wayne Hodgins, and dates from a working group in 1994 bearing the name. [ 2 ]
Vehicle, the class of all vehicles, or the abstract object that can be described by the criteria for being a vehicle. Car, the class of all cars, or the abstract object that can be described by the criteria for being a car. Class, representing the class of all classes, or the abstract object that can be described by the criteria for being a class.
In machine learning, one-class classification (OCC), also known as unary classification or class-modelling, tries to identify objects of a specific class amongst all objects, by primarily learning from a training set containing only the objects of that class, [1] although there exist variants of one-class classifiers where counter-examples are used to further refine the classification boundary.
Or it may refer to the label given to an object by the classifier. Classification is a part of many different kinds of activities and is studied from many different points of view including medicine , philosophy , [ 2 ] law , anthropology , biology , taxonomy , cognition , communications , knowledge organization , psychology , statistics ...