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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 rectangular function ： ウィキペディア英語版 rectangular function The rectangular function (also known as the rectangle function, rect function, Pi function, gate function, unit pulse, or the normalized boxcar function) is defined as: :$\backslash mathrm(t)\; =\; \backslash Pi(t)\; =\; \backslash begin$ 0 & \mbox |t| > \frac \\ \frac & \mbox |t| = \frac \\ 1 & \mbox |t| < \frac. \\ \end Alternative definitions of the function define $\backslash mathrm(\backslash pm\; \backslash tfrac)$ to be 0, 1, or undefined. ==Relation to the boxcar function== The rectangular function is a special case of the more general boxcar function: :$\backslash operatorname\backslash left(\backslash frac\; \backslash right)\; =\; u(t\; -\; (X\; -\; Y/2))\; -\; u(t\; -\; (X\; +\; Y/2))\; =\; u(t\; -\; X\; +\; Y/2)\; -\; u(t\; -\; X\; -\; Y/2)$ Where u is the Heaviside function; the function is centered at X and has duration Y, from X-Y/2 to X+Y/2. Another example is this: rect((t - (T/2)) / T ) goes from 0 to T, so in terms of Heaviside function u(t) - u((t-T) / T ) 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「rectangular 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.