Learning from Data Streams in Evolving Environments by Moamar Sayed-Mouchaweh

Author:Moamar Sayed-Mouchaweh
Language: eng
Format: epub, pdf
ISBN: 9783319898032
Publisher: Springer International Publishing

2 User Preference Dynamics

We present background definitions that ground the applicability of our proposed model in this article for processing evolving network stream. The following concepts have been proposed in [18].

2.1 User Preferences

According to [14], a preference is a comparative opinion that establishes an order relation between two objects. For example, when a user says “I prefer to read news about politics than sports” we can identify a preference of politics over sports.

A preference relation on a finite set of objects on a running domain A = {a1, …, an} is a strict partial order over A, represented by ≻. We denote by a1 ≻t a2 the fact that a1 is preferred to a2 at time t. The transitive closure (TC) of all preference relations of a user u at t composes u preferences at t, denoted by . As example, let A = {sports, politics, religion} be the set of objects in our running domain. We have and .

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.