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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Exponential-logarithmic distribution ： ウィキペディア英語版 Exponential-logarithmic distribution )} | mean = $-\backslash frac$ | median = $\backslash frac$ | mode = 0 | variance = $-\backslash frac$ $-\backslash frac$ | skewness = | kurtosis = | entropy = | mgf = $-\backslash frac\; \backslash text\_$ $((),(),1-p)$ | cf = | pgf = | fisher = }} In probability theory and statistics, the Exponential-Logarithmic (EL) distribution is a family of lifetime distributions with decreasing failure rate, defined on the interval [0, ∞). This distribution is parameterized by two parameters $p\backslash in(0,1)$ and $\backslash beta\; >0$. == Introduction == The study of lengths of organisms, devices, materials, etc., is of major importance in the biological and engineering sciences. In general, the lifetime of a device is expected to exhibit decreasing failure rate (DFR) when its behavior over time is characterized by 'work-hardening' (in engineering terms) or 'immunity' (in biological terms). The exponential-logarithmic model, together with its various properties, are studied by Tahmasbi and Rezaei (2008)〔Tahmasbi, R., Rezaei, S., (2008), "A two-parameter lifetime distribution with decreasing failure rate", ''Computational Statistics and Data Analysis'', 52 (8), 3889-3901. 〕 This model is obtained under the concept of population heterogeneity (through the process of compounding). 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「Exponential-logarithmic distribution」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.