翻訳と辞書 Words near each other ・ Sigmo (woreda) ・ SIGMOBILE ・ Sigmocycloceras ・ SIGMOD ・ SIGMOD Edgar F. Codd Innovations Award ・ Sigmodal ・ Sigmodontinae ・ Sigmodontomys ・ Sigmodontomys alfari ・ Sigmodontomys aphrastus ・ Sigmoepilachna ・ Sigmoid ・ Sigmoid arteries ・ Sigmoid colon ・ Sigmoid colon volvulus ・ Sigmoid function ・ Sigmoid mesocolon ・ Sigmoid sinus ・ Sigmoid sulcus ・ Sigmoidal ・ Sigmoideomycetaceae ・ Sigmoidocele ・ Sigmoidoscopy ・ Sigmoidotropis ・ Sigmoilina ・ Sigmoilinita ・ Sigmoilopsis ・ Sigmophora ・ Sigmops ・ Sigmuncus 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 Sigmoid function ： ウィキペディア英語版 Sigmoid function A sigmoid function is a mathematical function having an "S" shape (sigmoid curve). Often, ''sigmoid function'' refers to the special case of the logistic function shown in the first figure and defined by the formula :$S(t)\; =\; \backslash frac\{1\; +\; e^\{-t\}\}.$ Other examples of similar shapes include the Gompertz curve (used in modeling systems that saturate at large values of t) and the ogee curve (used in the spillway of some dams). A wide variety of sigmoid functions have been used as the activation function of artificial neurons, including the logistic and hyperbolic tangent functions. Sigmoid curves are also common in statistics as cumulative distribution functions, such as the integrals of the logistic distribution, the normal distribution, and Student's ''t'' probability density functions. ==Definition== A sigmoid function is a bounded differentiable real function that is defined for all real input values and has a positive derivative at each point. 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「Sigmoid function」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.