翻訳と辞書 Words near each other ・ Concerning Flight ・ Concerning Hobbits ・ Concerning Mr. Martin ・ Concerning Specific Forms of Masturbation ・ Concerning the Entrance into Eternity ・ Concept (disambiguation) ・ Concept (generic programming) ・ Concept album ・ Concept and object ・ Concept art ・ Concept car ・ Concept Centaur GT ・ Concept class ・ Concept Composites MD03 Transat ・ Concept development and experimentation ・ Concept drift ・ Concept driven strategy ・ Concept Foundation ・ Concept Ice Vehicle ・ Concept image and concept definition ・ Concept inventory ・ Concept learning ・ Concept map ・ Concept mining ・ Concept musical ・ Concept note ・ Concept of Life ・ Concept of One ・ Concept of One (album) ・ Concept of operations Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Concept drift ： ウィキペディア英語版 Concept drift In predictive analytics and machine learning, the concept drift means that the statistical properties of the target variable, which the model is trying to predict, change over time in unforeseen ways. This causes problems because the predictions become less accurate as time passes. The term ''concept'' refers to the quantity to be predicted. More generally, it can also refer to other phenomena of interest besides the target concept, such as an input, but, in the context of concept drift, the term commonly refers to the target variable. ==Examples== In a fraud detection application the target concept may be a binary attribute FRAUDULENT with values "yes" or "no" that indicates whether a given transaction is fraudulent. Or, in a weather prediction application, there may be several target concepts such as TEMPERATURE, PRESSURE, and HUMIDITY. The behavior of the customers in an online shop may change over time. For example, if weekly merchandise sales are to be predicted, and a predictive model has been developed that works satisfactorily. The model may use inputs such as the amount of money spent on advertising, promotions being run, and other metrics that may affect sales. The model is likely to become less and less accurate over time - this is concept drift. In the merchandise sales application, one reason for concept drift may be seasonality, which means that shopping behavior changes seasonally. Perhaps there will be higher sales in the winter holiday season than during the summer, for example. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Concept drift」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.