{"id":476784,"date":"2023-08-09T07:36:15","date_gmt":"2023-08-09T07:36:15","guid":{"rendered":""},"modified":"2023-09-05T11:13:26","modified_gmt":"2023-09-05T11:13:26","slug":"delta-rule","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/delta-rule\/","title":{"rendered":"quy t\u1eafc delta"},"content":{"rendered":"<p>Quy t\u1eafc Delta, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 quy t\u1eafc Widrow-Hoff ho\u1eb7c quy t\u1eafc B\u00ecnh ph\u01b0\u01a1ng trung b\u00ecnh nh\u1ecf nh\u1ea5t (LMS), l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong h\u1ecdc m\u00e1y v\u00e0 m\u1ea1ng l\u01b0\u1edbi th\u1ea7n kinh nh\u00e2n t\u1ea1o. \u0110\u00e2y l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n h\u1ecdc t\u0103ng d\u1ea7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh tr\u1ecdng s\u1ed1 c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c n\u01a1-ron nh\u00e2n t\u1ea1o, cho ph\u00e9p m\u1ea1ng h\u1ecdc v\u00e0 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c ph\u1ea3n h\u1ed3i c\u1ee7a n\u00f3 d\u1ef1a tr\u00ean d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o. Quy t\u1eafc Delta \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c thu\u1eadt to\u00e1n t\u1ed1i \u01b0u h\u00f3a d\u1ef1a tr\u00ean \u0111\u1ed9 d\u1ed1c v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m nh\u1eadn d\u1ea1ng m\u1eabu, x\u1eed l\u00fd t\u00edn hi\u1ec7u v\u00e0 h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a s\u1ef1 cai tr\u1ecb c\u1ee7a Delta v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n<p>Quy t\u1eafc Delta l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o n\u0103m 1960 b\u1edfi Bernard Widrow v\u00e0 Marcian Hoff nh\u01b0 m\u1ed9t ph\u1ea7n trong nghi\u00ean c\u1ee9u c\u1ee7a h\u1ecd v\u1ec1 c\u00e1c h\u1ec7 th\u1ed1ng th\u00edch \u1ee9ng. H\u1ecd nh\u1eb1m m\u1ee5c \u0111\u00edch ph\u00e1t tri\u1ec3n m\u1ed9t c\u01a1 ch\u1ebf cho ph\u00e9p m\u1ea1ng h\u1ecdc h\u1ecfi t\u1eeb c\u00e1c v\u00ed d\u1ee5 v\u00e0 t\u1ef1 \u0111i\u1ec1u ch\u1ec9nh tr\u1ecdng s\u1ed1 kh\u1edbp th\u1ea7n kinh c\u1ee7a n\u00f3 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u sai s\u1ed1 gi\u1eefa \u0111\u1ea7u ra c\u1ee7a n\u00f3 v\u00e0 \u0111\u1ea7u ra mong mu\u1ed1n. B\u00e0i b\u00e1o mang t\u00ednh \u0111\u1ed9t ph\u00e1 c\u1ee7a h\u1ecd c\u00f3 t\u1ef1a \u0111\u1ec1 \u201cM\u1ea1ch chuy\u1ec3n m\u1ea1ch th\u00edch \u1ee9ng\u201d \u0111\u00e3 \u0111\u00e1nh d\u1ea5u s\u1ef1 ra \u0111\u1eddi c\u1ee7a quy t\u1eafc Delta v\u00e0 \u0111\u1eb7t n\u1ec1n m\u00f3ng cho l\u0129nh v\u1ef1c thu\u1eadt to\u00e1n h\u1ecdc m\u1ea1ng th\u1ea7n kinh.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 quy t\u1eafc Delta: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 Quy t\u1eafc Delta<\/h2>\n<p>Quy t\u1eafc Delta ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean t\u1eafc h\u1ecdc c\u00f3 gi\u00e1m s\u00e1t, trong \u0111\u00f3 m\u1ea1ng \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c c\u1eb7p d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o-\u0111\u1ea7u ra. Trong qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n, m\u1ea1ng so s\u00e1nh \u0111\u1ea7u ra d\u1ef1 \u0111o\u00e1n c\u1ee7a n\u00f3 v\u1edbi \u0111\u1ea7u ra mong mu\u1ed1n, t\u00ednh to\u00e1n l\u1ed7i (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 delta) v\u00e0 c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1 k\u1ebft n\u1ed1i t\u01b0\u01a1ng \u1ee9ng. M\u1ee5c ti\u00eau ch\u00ednh l\u00e0 gi\u1ea3m thi\u1ec3u l\u1ed7i qua nhi\u1ec1u l\u1ea7n l\u1eb7p cho \u0111\u1ebfn khi m\u1ea1ng h\u1ed9i t\u1ee5 v\u1ec1 m\u1ed9t gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a quy t\u1eafc Delta: Quy t\u1eafc Delta ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<p>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a quy t\u1eafc Delta c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ol>\n<li>\n<p><strong>Kh\u1edfi t\u1ea1o<\/strong>: Kh\u1edfi t\u1ea1o tr\u1ecdng s\u1ed1 c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c n\u01a1-ron v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb ng\u1eabu nhi\u00ean nh\u1ecf ho\u1eb7c gi\u00e1 tr\u1ecb \u0111\u1ecbnh tr\u01b0\u1edbc.<\/p>\n<\/li>\n<li>\n<p><strong>Tuy\u00ean truy\u1ec1n chuy\u1ec3n ti\u1ebfp<\/strong>: Tr\u00ecnh b\u00e0y m\u1ed9t m\u1eabu \u0111\u1ea7u v\u00e0o cho m\u1ea1ng v\u00e0 truy\u1ec1n n\u00f3 \u0111i ti\u1ebfp qua c\u00e1c l\u1edbp n\u01a1-ron \u0111\u1ec3 t\u1ea1o ra \u0111\u1ea7u ra.<\/p>\n<\/li>\n<li>\n<p><strong>T\u00ednh to\u00e1n l\u1ed7i<\/strong>: So s\u00e1nh \u0111\u1ea7u ra c\u1ee7a m\u1ea1ng v\u1edbi \u0111\u1ea7u ra mong mu\u1ed1n v\u00e0 t\u00ednh to\u00e1n sai s\u1ed1 (delta) gi\u1eefa ch\u00fang. L\u1ed7i th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ea7u ra d\u1ef1 \u0111o\u00e1n v\u00e0 \u0111\u1ea7u ra m\u1ee5c ti\u00eau.<\/p>\n<\/li>\n<li>\n<p><strong>C\u1eadp nh\u1eadt c\u00e2n n\u1eb7ng<\/strong>: \u0110i\u1ec1u ch\u1ec9nh tr\u1ecdng s\u1ed1 c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i d\u1ef1a tr\u00ean sai s\u1ed1 t\u00ednh to\u00e1n. Vi\u1ec7c c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng:<\/p>\n<p>\u0394W = t\u1ed1c \u0111\u1ed9 h\u1ecdc t\u1eadp * delta * \u0111\u1ea7u v\u00e0o<\/p>\n<p>\u1ede \u0111\u00e2y, \u0394W l\u00e0 c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1, learning_rate l\u00e0 h\u1eb1ng s\u1ed1 d\u01b0\u01a1ng nh\u1ecf \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1ed1c \u0111\u1ed9 h\u1ecdc (ho\u1eb7c k\u00edch th\u01b0\u1edbc b\u01b0\u1edbc) v\u00e0 \u0111\u1ea7u v\u00e0o \u0111\u1ea1i di\u1ec7n cho m\u1eabu \u0111\u1ea7u v\u00e0o.<\/p>\n<\/li>\n<li>\n<p><strong>L\u1eb7p l\u1ea1i<\/strong>: Ti\u1ebfp t\u1ee5c tr\u00ecnh b\u00e0y c\u00e1c m\u1eabu \u0111\u1ea7u v\u00e0o, t\u00ednh to\u00e1n l\u1ed7i v\u00e0 c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1 cho t\u1eebng m\u1eabu trong t\u1eadp d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n. L\u1eb7p l\u1ea1i qu\u00e1 tr\u00ecnh n\u00e0y cho \u0111\u1ebfn khi m\u1ea1ng \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 ch\u00ednh x\u00e1c th\u1ecfa \u0111\u00e1ng ho\u1eb7c h\u1ed9i t\u1ee5 v\u1ec1 m\u1ed9t gi\u1ea3i ph\u00e1p \u1ed5n \u0111\u1ecbnh.<\/p>\n<\/li>\n<\/ol>\n<h2>Ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a quy t\u1eafc Delta<\/h2>\n<p>Quy t\u1eafc Delta th\u1ec3 hi\u1ec7n m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau:<\/p>\n<ol>\n<li>\n<p><strong>H\u1ecdc tr\u1ef1c tuy\u1ebfn<\/strong>: Quy t\u1eafc Delta l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n h\u1ecdc tr\u1ef1c tuy\u1ebfn, c\u00f3 ngh\u0129a l\u00e0 n\u00f3 c\u1eadp nh\u1eadt c\u00e1c tr\u1ecdng s\u1ed1 sau m\u1ed7i l\u1ea7n tr\u00ecnh b\u00e0y m\u1eabu \u0111\u1ea7u v\u00e0o. T\u00ednh n\u0103ng n\u00e0y cho ph\u00e9p m\u1ea1ng th\u00edch \u1ee9ng nhanh ch\u00f3ng v\u1edbi vi\u1ec7c thay \u0111\u1ed5i d\u1eef li\u1ec7u v\u00e0 l\u00e0m cho n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c.<\/p>\n<\/li>\n<li>\n<p><strong>Kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng<\/strong>: Quy t\u1eafc Delta c\u00f3 th\u1ec3 th\u00edch \u1ee9ng v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00f4ng c\u1ed1 \u0111\u1ecbnh trong \u0111\u00f3 c\u00e1c thu\u1ed9c t\u00ednh th\u1ed1ng k\u00ea c\u1ee7a d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo th\u1eddi gian.<\/p>\n<\/li>\n<li>\n<p><strong>S\u1ef1 \u0111\u01a1n gi\u1ea3n<\/strong>: T\u00ednh \u0111\u01a1n gi\u1ea3n c\u1ee7a thu\u1eadt to\u00e1n gi\u00fap d\u1ec5 d\u00e0ng tri\u1ec3n khai v\u00e0 t\u00ednh to\u00e1n hi\u1ec7u qu\u1ea3, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng th\u1ea7n kinh c\u1ee1 nh\u1ecf v\u00e0 v\u1eeba.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed1i \u01b0u h\u00f3a c\u1ee5c b\u1ed9<\/strong>: Vi\u1ec7c c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean l\u1ed7i c\u1ee7a t\u1eebng m\u1eabu, bi\u1ebfn n\u00f3 th\u00e0nh m\u1ed9t h\u00ecnh th\u1ee9c t\u1ed1i \u01b0u h\u00f3a c\u1ee5c b\u1ed9.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i quy t\u1eafc Delta: S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch \u0111\u1ec3 vi\u1ebft<\/h2>\n<p>Quy t\u1eafc Delta c\u00f3 nhi\u1ec1u bi\u1ebfn th\u1ec3 kh\u00e1c nhau d\u1ef1a tr\u00ean c\u00e1c nhi\u1ec7m v\u1ee5 h\u1ecdc t\u1eadp c\u1ee5 th\u1ec3 v\u00e0 ki\u1ebfn tr\u00fac m\u1ea1ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i \u0111\u00e1ng ch\u00fa \u00fd:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Quy t\u1eafc Delta h\u00e0ng lo\u1ea1t<\/td>\n<td>T\u00ednh to\u00e1n c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1 sau khi t\u00edch l\u0169y l\u1ed7i<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>nhi\u1ec1u m\u1eabu \u0111\u1ea7u v\u00e0o. H\u1eefu \u00edch cho vi\u1ec7c h\u1ecdc ngo\u1ea1i tuy\u1ebfn.<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Delta \u0111\u1ec7 quy<\/td>\n<td>\u00c1p d\u1ee5ng c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt \u0111\u1ec7 quy \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi tu\u1ea7n t\u1ef1<\/td>\n<\/tr>\n<tr>\n<td>Lu\u1eadt l\u1ec7<\/td>\n<td>c\u00e1c m\u1eabu \u0111\u1ea7u v\u00e0o, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u1eef li\u1ec7u chu\u1ed7i th\u1eddi gian.<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Delta ch\u00ednh quy<\/td>\n<td>K\u1ebft h\u1ee3p c\u00e1c \u0111i\u1ec1u kho\u1ea3n ch\u00ednh quy h\u00f3a \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c trang b\u1ecb qu\u00e1 m\u1ee9c<\/td>\n<\/tr>\n<tr>\n<td>Lu\u1eadt l\u1ec7<\/td>\n<td>v\u00e0 c\u1ea3i thi\u1ec7n t\u00ednh t\u1ed5ng qu\u00e1t.<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Delta-Bar-Delta<\/td>\n<td>\u0110i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 h\u1ecdc t\u1eadp d\u1ef1a tr\u00ean d\u1ea5u hi\u1ec7u c\u1ee7a l\u1ed7i<\/td>\n<\/tr>\n<tr>\n<td>Lu\u1eadt l\u1ec7<\/td>\n<td>v\u00e0 c\u00e1c b\u1ea3n c\u1eadp nh\u1eadt tr\u01b0\u1edbc \u0111\u00f3.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng quy t\u1eafc Delta, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<p>Quy t\u1eafc Delta \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau:<\/p>\n<ol>\n<li>\n<p><strong>Nh\u1eadn d\u1ea1ng m\u1eabu<\/strong>: Quy t\u1eafc Delta \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i cho c\u00e1c t\u00e1c v\u1ee5 nh\u1eadn d\u1ea1ng m\u1eabu, ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u1eadn d\u1ea1ng h\u00ecnh \u1ea3nh v\u00e0 gi\u1ecdng n\u00f3i, trong \u0111\u00f3 m\u1ea1ng h\u1ecdc c\u00e1ch li\u00ean k\u1ebft c\u00e1c m\u1eabu \u0111\u1ea7u v\u00e0o v\u1edbi c\u00e1c nh\u00e3n t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<\/li>\n<li>\n<p><strong>H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n<\/strong>: Trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n, quy t\u1eafc Delta \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c tham s\u1ed1 \u0111i\u1ec1u khi\u1ec3n d\u1ef1a tr\u00ean ph\u1ea3n h\u1ed3i nh\u1eb1m \u0111\u1ea1t \u0111\u01b0\u1ee3c ho\u1ea1t \u0111\u1ed9ng mong mu\u1ed1n c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<\/li>\n<li>\n<p><strong>X\u1eed l\u00fd t\u00edn hi\u1ec7u<\/strong>: Quy t\u1eafc Delta \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng x\u1eed l\u00fd t\u00edn hi\u1ec7u th\u00edch \u1ee9ng, nh\u01b0 kh\u1eed nhi\u1ec5u v\u00e0 kh\u1eed ti\u1ebfng vang.<\/p>\n<\/li>\n<\/ol>\n<p>M\u1eb7c d\u00f9 h\u1eefu \u00edch nh\u01b0ng quy t\u1eafc Delta c\u00f3 m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c:<\/p>\n<ol>\n<li>\n<p><strong>T\u1ed1c \u0111\u1ed9 h\u1ed9i t\u1ee5<\/strong>: Thu\u1eadt to\u00e1n c\u00f3 th\u1ec3 h\u1ed9i t\u1ee5 ch\u1eadm, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong kh\u00f4ng gian nhi\u1ec1u chi\u1ec1u ho\u1eb7c m\u1ea1ng ph\u1ee9c t\u1ea1p.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed1i thi\u1ec3u \u0111\u1ecba ph\u01b0\u01a1ng<\/strong>: Quy t\u1eafc Delta c\u00f3 th\u1ec3 b\u1ecb k\u1eb9t \u1edf c\u1ef1c ti\u1ec3u c\u1ee5c b\u1ed9, kh\u00f4ng t\u00ecm \u0111\u01b0\u1ee3c m\u1ee9c t\u1ed1i \u01b0u to\u00e0n c\u1ee5c.<\/p>\n<\/li>\n<\/ol>\n<p>\u0110\u1ec3 gi\u1ea3i quy\u1ebft nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0:<\/p>\n<ul>\n<li>\n<p><strong>L\u1eadp k\u1ebf ho\u1ea1ch t\u1ef7 l\u1ec7 h\u1ecdc t\u1eadp<\/strong>: \u0110i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 h\u1ecdc m\u1ed9t c\u00e1ch linh ho\u1ea1t trong qu\u00e1 tr\u00ecnh \u0111\u00e0o t\u1ea1o \u0111\u1ec3 c\u00e2n b\u1eb1ng t\u1ed1c \u0111\u1ed9 h\u1ed9i t\u1ee5 v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh.<\/p>\n<\/li>\n<li>\n<p><strong>Qu\u00e1n t\u00ednh<\/strong>: K\u1ebft h\u1ee3p c\u00e1c s\u1ed1 h\u1ea1ng \u0111\u1ed9ng l\u01b0\u1ee3ng trong c\u1eadp nh\u1eadt tr\u1ecdng s\u1ed1 \u0111\u1ec3 tho\u00e1t kh\u1ecfi c\u1ef1c ti\u1ec3u c\u1ee5c b\u1ed9 v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 h\u1ed9i t\u1ee5.<\/p>\n<\/li>\n<\/ul>\n<h2>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1: \u1ede d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch<\/h2>\n<table>\n<thead>\n<tr>\n<th>Quy t\u1eafc Delta so v\u1edbi<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Lan truy\u1ec1n ng\u01b0\u1ee3c<\/td>\n<td>C\u1ea3 hai \u0111\u1ec1u l\u00e0 thu\u1eadt to\u00e1n h\u1ecdc c\u00f3 gi\u00e1m s\u00e1t cho h\u1ec7 th\u1ea7n kinh<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>m\u1ea1ng, nh\u01b0ng Backpropagation s\u1eed d\u1ee5ng quy t\u1eafc chu\u1ed7i d\u1ef1a tr\u00ean<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>ph\u01b0\u01a1ng ph\u00e1p c\u1eadp nh\u1eadt tr\u1ecdng l\u01b0\u1ee3ng, trong khi quy t\u1eafc Delta s\u1eed d\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>sai s\u1ed1 gi\u1eefa \u0111\u1ea7u ra th\u1ef1c t\u1ebf v\u00e0 \u0111\u1ea7u ra mong mu\u1ed1n.<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Quy t\u1eafc Perceptron<\/td>\n<td>Quy t\u1eafc Perceptron l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n ph\u00e2n lo\u1ea1i nh\u1ecb ph\u00e2n<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>d\u1ef1a tr\u00ean d\u1ea5u hi\u1ec7u c\u1ee7a \u0111\u1ea7u ra. Ng\u01b0\u1ee3c l\u1ea1i, quy t\u1eafc Delta<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho c\u00e1c t\u00e1c v\u1ee5 \u0111\u1ea7u ra v\u00e0 h\u1ed3i quy li\u00ean t\u1ee5c.<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Ph\u01b0\u01a1ng ph\u00e1p b\u00ecnh ph\u01b0\u01a1ng t\u1ed1i thi\u1ec3u<\/td>\n<td>C\u1ea3 hai \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u00e0i to\u00e1n h\u1ed3i quy tuy\u1ebfn t\u00ednh, nh\u01b0ng<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>Ph\u01b0\u01a1ng ph\u00e1p b\u00ecnh ph\u01b0\u01a1ng t\u1ed1i thi\u1ec3u gi\u1ea3m thi\u1ec3u t\u1ed5ng sai s\u1ed1 b\u00ecnh ph\u01b0\u01a1ng,<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>trong khi quy t\u1eafc Delta s\u1eed d\u1ee5ng l\u1ed7i t\u1ee9c th\u1eddi.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn quy t\u1eafc Delta<\/h2>\n<p>Quy t\u1eafc Delta \u0111\u00e3 m\u1edf \u0111\u01b0\u1eddng cho c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc t\u1eadp v\u00e0 ki\u1ebfn tr\u00fac m\u1ea1ng th\u1ea7n kinh n\u00e2ng cao h\u01a1n. Khi l\u0129nh v\u1ef1c h\u1ecdc m\u00e1y ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111ang kh\u00e1m ph\u00e1 nhi\u1ec1u h\u01b0\u1edbng kh\u00e1c nhau \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc t\u1eadp:<\/p>\n<ol>\n<li>\n<p><strong>H\u1ecdc k\u0129 c\u00e0ng<\/strong>: Vi\u1ec7c k\u1ebft h\u1ee3p quy t\u1eafc Delta v\u1edbi ki\u1ebfn tr\u00fac h\u1ecdc s\u00e2u cho ph\u00e9p h\u1ecdc bi\u1ec3u di\u1ec5n theo c\u1ea5p b\u1eadc, cho ph\u00e9p m\u1ea1ng x\u1eed l\u00fd c\u00e1c t\u00e1c v\u1ee5 ph\u1ee9c t\u1ea1p h\u01a1n v\u00e0 d\u1eef li\u1ec7u l\u1edbn h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>H\u1ecdc t\u0103ng c\u01b0\u1eddng<\/strong>: Vi\u1ec7c t\u00edch h\u1ee3p quy t\u1eafc Delta v\u1edbi c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc t\u0103ng c\u01b0\u1eddng c\u00f3 th\u1ec3 mang l\u1ea1i h\u1ec7 th\u1ed1ng h\u1ecdc t\u1eadp hi\u1ec7u qu\u1ea3 v\u00e0 d\u1ec5 th\u00edch \u1ee9ng h\u01a1n.<\/p>\n<\/li>\n<li>\n<p><strong>Si\u00eau h\u1ecdc t\u1eadp<\/strong>: C\u00e1c k\u1ef9 thu\u1eadt si\u00eau h\u1ecdc t\u1eadp nh\u1eb1m m\u1ee5c \u0111\u00edch c\u1ea3i thi\u1ec7n qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp, l\u00e0m cho c\u00e1c thu\u1eadt to\u00e1n nh\u01b0 quy t\u1eafc Delta hi\u1ec7u qu\u1ea3 h\u01a1n v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng kh\u00e1i qu\u00e1t h\u00f3a gi\u1eefa c\u00e1c nhi\u1ec7m v\u1ee5.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi quy t\u1eafc Delta<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c thu th\u1eadp v\u00e0 ti\u1ec1n x\u1eed l\u00fd d\u1eef li\u1ec7u, \u0111\u00e2y l\u00e0 nh\u1eefng b\u01b0\u1edbc c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u00e0o t\u1ea1o c\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y nh\u01b0 m\u1ea1ng d\u1ef1a tr\u00ean quy t\u1eafc Delta. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e1ch c\u00f3 th\u1ec3 li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi quy t\u1eafc Delta:<\/p>\n<ol>\n<li>\n<p><strong>Thu th\u1eadp d\u1eef li\u1ec7u<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thu th\u1eadp v\u00e0 \u1ea9n danh d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau, gi\u00fap thu th\u1eadp c\u00e1c b\u1ed9 d\u1eef li\u1ec7u \u0111a d\u1ea1ng \u0111\u1ec3 \u0111\u00e0o t\u1ea1o.<\/p>\n<\/li>\n<li>\n<p><strong>C\u00e2n b\u1eb1ng t\u1ea3i<\/strong>: M\u00e1y ch\u1ee7 proxy ph\u00e2n ph\u1ed1i y\u00eau c\u1ea7u gi\u1eefa nhi\u1ec1u t\u00e0i nguy\u00ean, t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh thu th\u1eadp d\u1eef li\u1ec7u cho ch\u1ebf \u0111\u1ed9 h\u1ecdc t\u1eadp tr\u1ef1c tuy\u1ebfn c\u1ee7a quy t\u1eafc Delta.<\/p>\n<\/li>\n<li>\n<p><strong>Quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m trong qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a th\u00f4ng tin \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh \u0111\u00e0o t\u1ea1o quy t\u1eafc Delta.<\/p>\n<\/li>\n<\/ol>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 quy t\u1eafc Delta v\u00e0 c\u00e1c ch\u1ee7 \u0111\u1ec1 li\u00ean quan, vui l\u00f2ng tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/ieeexplore.ieee.org\/document\/1113663\" target=\"_new\" rel=\"noopener nofollow\">M\u1ea1ch chuy\u1ec3n m\u1ea1ch th\u00edch \u1ee9ng \u2013 Gi\u1ea5y g\u1ed1c<\/a><\/li>\n<li><a href=\"https:\/\/www.cs.cornell.edu\/courses\/cs4780\/2018fa\/lectures\/lecturenote07.html\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1edbi thi\u1ec7u v\u1ec1 Quy t\u1eafc Delta \u2013 \u0110\u1ea1i h\u1ecdc Cornell<\/a><\/li>\n<li><a href=\"https:\/\/www.geeksforgeeks.org\/machine-learning-delta-rule-and-perceptron-rule\/\" target=\"_new\" rel=\"noopener nofollow\">H\u1ecdc m\u00e1y: Quy t\u1eafc Delta v\u00e0 Quy t\u1eafc Perceptron \u2013 GeeksforGeeks<\/a><\/li>\n<\/ol>\n<p>T\u00f3m l\u1ea1i, quy t\u1eafc Delta l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n n\u1ec1n t\u1ea3ng \u0111\u00e3 g\u00f3p ph\u1ea7n \u0111\u00e1ng k\u1ec3 v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a m\u1ea1ng l\u01b0\u1edbi th\u1ea7n kinh nh\u00e2n t\u1ea1o v\u00e0 h\u1ecdc m\u00e1y. Kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng v\u1edbi m\u00f4i tr\u01b0\u1eddng thay \u0111\u1ed5i v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c c\u1eadp nh\u1eadt gia t\u0103ng khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb cho nhi\u1ec1u \u1ee9ng d\u1ee5ng. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, quy t\u1eafc Delta c\u00f3 th\u1ec3 s\u1ebd ti\u1ebfp t\u1ee5c truy\u1ec1n c\u1ea3m h\u1ee9ng cho c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc t\u1eadp m\u1edbi v\u00e0 th\u00fac \u0111\u1ea9y s\u1ef1 ti\u1ebfn b\u1ed9 trong l\u0129nh v\u1ef1c tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o.<\/p>","protected":false},"featured_media":476785,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476784","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Delta Rule: A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is the Delta rule?","answer":"<p>The Delta rule, also known as the Widrow-Hoff rule or the Least Mean Square (LMS) rule, is a fundamental concept in machine learning and neural networks. It is an incremental learning algorithm that adjusts the weights of connections between artificial neurons based on input data, enabling the network to learn and adapt its responses.<\/p>"},{"question":"Who introduced the Delta rule?","answer":"<p>The Delta rule was first introduced by Bernard Widrow and Marcian Hoff in 1960 as part of their research on adaptive systems. Their groundbreaking paper titled \"Adaptive Switching Circuits\" marked the birth of the Delta rule and laid the foundation for neural network learning algorithms.<\/p>"},{"question":"How does the Delta rule work?","answer":"<p>The Delta rule operates on supervised learning principles. During training, the network compares its predicted output with the desired output, calculates the error (delta), and updates the connection weights accordingly. The process is repeated for each input pattern until the network converges to a suitable solution.<\/p>"},{"question":"What are the key features of the Delta rule?","answer":"<p>The Delta rule exhibits features like online learning, adaptability to non-stationary environments, simplicity in implementation, and local optimization for weight updates.<\/p>"},{"question":"What are the types of Delta rule?","answer":"<p>There are several types of Delta rule variations, including Batch Delta Rule, Recursive Delta Rule, Regularized Delta Rule, and Delta-Bar-Delta Rule. Each type serves specific learning tasks and network architectures.<\/p>"},{"question":"Where is the Delta rule used?","answer":"<p>The Delta rule finds application in various fields, including pattern recognition, control systems, and signal processing. It is used to solve problems where the network needs to learn from data and adapt to changing conditions.<\/p>"},{"question":"What are the challenges with the Delta rule?","answer":"<p>Some challenges with the Delta rule include convergence speed, potential for getting stuck in local minima, and the need for careful tuning of hyperparameters like the learning rate.<\/p>"},{"question":"How can proxy servers be associated with the Delta rule?","answer":"<p>Proxy servers play a role in data collection and preprocessing, providing a way to gather diverse datasets for training, optimize data acquisition, and ensure data privacy and security during the training process.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476784","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476784\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476785"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476784"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}