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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 Photon diffusion equation ： ウィキペディア英語版 Photon diffusion equation Photon diffusion equation is a second order partial differential equation describing the time behavior of photon fluence rate distribution in a low-absorption high-scattering medium. Its mathematical form is as follows. $\backslash nabla(D(r)\backslash cdot\backslash nabla)\backslash Phi(\backslash vec,t)-v\backslash mu\_a(\backslash vec)\backslash Phi(\backslash vec,t)+vS(\backslash vec,t)=\backslash frac$ where $\backslash Phi$ is photon fluence rate (W/cm2), $\backslash mu\_a$ is absorption coefficient (cm−1), $D$ is diffusion constant, $v$ is the speed of light in the medium (m/s), and $S$ is an isotropic source term (W/cm3). Its main difference with diffusion equation in physics is that photon diffusion equation has an absorption term in it. ==Application== 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「Photon diffusion equation」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.