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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 transport coefficient ： ウィキペディア英語版 transport coefficient A Transport coefficient $\backslash gamma$ can be expressed via a Green-Kubo relation: :$\backslash gamma=\; \backslash int\_0^\backslash infty\; \backslash langle\; \backslash dot(t)\; \backslash dot(0)\; \backslash rangle\; dt$, where $A$ is an observable occurring in a perturbed Hamiltonian, $\backslash langle\; \backslash cdot\; \backslash rangle$ is an ensemble average and the dot above the A denotes the time derivative.〔Water in Biology, Chemistry, and Physics: Experimental Overviews and Computational Methodologies, G. Wilse Robinson, ISBN 9789810224516, p. 80, (Google Books )〕 For times $t$ that are greater than the correlation time of the fluctuations of the observable the transport coefficient obeys a generalized Einstein relation: :$2t\backslash gamma=\backslash langle\; |A(t)-A(0)|^2\; \backslash rangle$ == Examples == * Diffusion constant, relates the flux of particles with the negative gradient of the concentration (see Fick's laws of diffusion) * Heat transport coefficient * Mass transport coefficient * Shear Viscosity $\backslash eta\; =\; \backslash frac\backslash int\_0\; ^\backslash infty\; dt\; \backslash langle\; \backslash sigma\_(0)\; \backslash sigma\_\; (t)\; \backslash rangle$ * Electrical conductivity 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「transport coefficient」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.