翻訳と辞書 Words near each other ・ Simon of Wells ・ Simon of Worcester ・ Simon Ogar Veron ・ Simon Ok Hyun-jin ・ Simon Okker ・ Simon Okwi ・ Simon Oliver ・ Simon Olivier Fecteau ・ Simon Oosterman ・ Simon Orchard ・ Simon Osborn ・ Simon Osborn Giffin ・ Simon Ostrach ・ Simon Ostrovsky ・ Simon Mitton ・ Simon model ・ Simon Mol ・ Simon Molesworth ・ Simon Molitor ・ Simon Monjack ・ Simon Monroe ・ Simon Montacute ・ Simon Moon ・ Simon Moore ・ Simon Moore (cricketer, born 1973) ・ Simon Moore (cricketer, born 1974) ・ Simon Moore (footballer) ・ Simon Moore (Royal Navy officer) ・ Simon Moore (writer) ・ Simon Mopinot 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 Simon model ： ウィキペディア英語版 Simon model In applied probability theory, the Simon model is a class of stochastic models that results in a power-law distribution function. It was proposed by Herbert A. Simon〔Simon, H. A., 1955, Biometrika 42, 425.〕 to account for the wide range of empirical distributions following a power-law. It models the dynamics of a system of elements with associated counters (e.g., words and their frequencies in texts, or nodes in a network and their connectivity $k$). In this model the dynamics of the system is based on constant growth via addition of new elements (new instances of words) as well as incrementing the counters (new occurrences of a word) at a rate proportional to their current values. == Description == To model this type of network growth as described above, Bornholdt and Ebel〔Bornholdt, S. and H. Ebel, Phys. Rev. E 64 (2001) 035104(R).〕 considered a network with $n$ nodes, and each node with connectivities $k\_i$, $i\; =\; 1,\; \backslash ldots,\; n$. These nodes form classes $()$ of $f(k)$ nodes with identical connectivity $k$. Repeat the following steps: (i) With probability $\backslash alpha$ add a new node and attach a link to it from an arbitrarily chosen node. (ii) With probability $1-\backslash alpha$ add one link from an arbitrary node to a node $j$ of class $()$ chosen with a probability proportional to $k\; f(k)$. For this stochastic process, Simon found a stationary solution exhibiting power-law scaling, $P(k)\; \backslash propto\; k^$, with exponent $\backslash gamma\; =\; 1\; +\; \backslash frac.$ 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「Simon model」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.