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ç¢ºçŽ‡è¨ˆç”»æ³•ã¨ãã®å‘¨è¾ºã®ç´¹ä»‹ - Qiita
ã¯ã˜ã‚ã« æ•°ç†æœ€é©åŒ–ã®å…¥é–€æ›¸ã‚’èªã¿ã€ã§ã¯ãƒ‡ãƒ¼ã‚¿ãŒä¸Žãˆã‚‰ã‚ŒãŸçŠ¶æ…‹ã§ã©ã®ã‚ˆã†ã«æœ€é©åŒ–å•é¡Œã‚’æ§‹ç¯‰ã™ã‚Œã°è‰¯ã„ã‹ã¨ç–‘å•ã«æ€ã‚ã‚ŒãŸæ–¹ã‚’å¯¾è±¡ã«ã€å¤å…¸çš„ãªæ‰‹æ³•ã‹ã‚‰è¿‘å¹´æ³¨ç›®ã•ã‚Œã¦ã„ã‚‹ãƒ¢ãƒ‡ãƒªãƒ³ã‚°æ‰‹æ³•ã«ã¤ã„ã¦ç´¹ä»‹ã—ã¾ã™ã€‚ åŸºã¨ãªã‚‹æœ€é©åŒ–å•é¡Œã‚’å¤§å¹…ã«å˜ç´”åŒ–ã™ã‚‹ãŸã‚ã«ä»¥ä¸‹ã§ã¯ä¸»ã« $$ \begin{align} \min_x\quad & c^{\top}x \\ \mbox{s.t.}\quad & Ax\leq b,\\ & x \in \mathbb{R}^n, \end{align} $$ ã®å½¢å¼ã®ç·šå½¢è¨ˆç”»å•é¡Œã‚’å–ã‚Šæ‰±ã„ã¾ã™ãŒã€å¤šãã¯å‡¸æœ€é©åŒ–å•é¡Œã€æ•´æ•°æœ€é©åŒ–å•é¡Œã«æ‹¡å¼µã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ 1. ç¢ºçŽ‡è¨ˆç”»æ³• (Stochastic Programming) ç¢ºçŽ‡çš„ã«æŒ¯ã‚‹èˆžã†ãƒ‘ãƒ©ãƒ¡ãƒ¼ã‚¿ãŒå˜åœ¨ã—ã€ãã®åˆ†å¸ƒãŒåˆ¤æ˜Žã—ã¦ã„ã‚‹ã‹ãƒ‡ãƒ¼ã‚¿ãŒååˆ†ã«å˜åœ¨ã™ã‚‹å ´åˆã‚’å–ã‚Šæ‰±ã„ã¾ã™ã€‚ 1.1. ç›®çš„é–¢æ•°ã®ä¸ç¢ºå®šæ€§ ç›®çš„é–¢æ•°ã®ä¿‚æ•°ã§ã‚
syou6162 2021/01/04
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4. æœ€çµ‚å®Ÿè£…ã‚³ãƒ¼ãƒ‰ ï®ä»Šå›žã®ç›®æ¨™ã¯ã“ã®ã‚³ãƒ¼ãƒ‰ã®æ„å‘³ã‚’ç†è§£ã™ã‚‹ã“ã¨ 2011/8/6 /204 union di { uint64_t i; double d; }; double expd(double x) { di di; di.d = x * 2954.639443740597 + 6755399441055744ULL; uint64_t iax = tbl[di.i & 2047]; double t = (di.d - 6755399441055744ULL) * 0.0003384507717577858 - x; uint64_t u = ((di.i + 2095104) >> 11) << 52; double y = (3.0000000027955394 - t) * (t * t) * 0.16666666685227835 - t + 1; di.i = u
syou6162 2011/10/05
math

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General Topics in R Archive
syou6162 2007/12/19
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Optimizing Machine Learning Programs â€“ Machine Learning (Theory)
Machine learning is often computationally bounded which implies that the ability to write fast code becomes important if you ever want to implement a machine learning algorithm. Basic tactical optimizations are covered well elsewhere, but I havenâ€™t seen a reasonable guide to higher level optimizations, which are the most important in my experience. Here are some of the higher level optimizations I
syou6162 2007/10/17
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Rã§æ•°ç†è¨ˆç”» - RjpWiki
Rã§æ•°ç†è¨ˆç”» (ä¾‹é¡Œãªã©ã€ã©ã‚“ã©ã‚“ä»˜ã‘è¶³ã—ã¦ãã ã•ã„ã€‚) ã“ã“ã§ã¯ã€Rã®é–¢æ•°ã‚’åˆ©ç”¨ã—ãŸæ•°ç†è¨ˆç”»å•é¡Œã®è§£æ³•ã‚’èª¬æ˜Žã—ã¾ã™ã€‚ Rã§ã‚‚æ—¢å˜ã®é–¢æ•°ã‚’åˆ©ç”¨ã—ã¦ã€åˆ¶ç´„æ¡ä»¶ä»˜ãæœ€é©åŒ–å•é¡Œã‚’è§£ãã“ã¨ãŒã§ãã¾ã™ã€‚
syou6162 2006/09/01
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syou6162 2006/09/01
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