{"id":477726,"date":"2023-08-09T09:19:17","date_gmt":"2023-08-09T09:19:17","guid":{"rendered":""},"modified":"2024-08-29T06:39:37","modified_gmt":"2024-08-29T06:39:37","slug":"isolation-forest","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/isolation-forest\/","title":{"rendered":"R\u1eebng C\u00e1ch Ly"},"content":{"rendered":"<p>R\u1eebng c\u00e1ch ly l\u00e0 m\u1ed9t thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng. N\u00f3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1edbi \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng trong c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n th\u1ed1ng d\u1ef1a v\u00e0o vi\u1ec7c x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p th\u00f4ng th\u01b0\u1eddng, R\u1eebng C\u00e1ch ly th\u1ef1c hi\u1ec7n m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn kh\u00e1c b\u1eb1ng c\u00e1ch c\u00f4 l\u1eadp tr\u1ef1c ti\u1ebfp c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a R\u1eebng C\u00e1ch Nhi\u1ec7t v\u00e0 nh\u1eefng l\u1ea7n \u0111\u1ea7u \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n<p>Kh\u00e1i ni\u1ec7m Khu r\u1eebng c\u00e1ch ly \u0111\u01b0\u1ee3c Fei Tony Liu, Kai Ming Ting v\u00e0 Zhi-Hua Zhou gi\u1edbi thi\u1ec7u l\u1ea7n \u0111\u1ea7u ti\u00ean v\u00e0o n\u0103m 2008 trong b\u00e0i b\u00e1o c\u1ee7a h\u1ecd c\u00f3 t\u1ef1a \u0111\u1ec1 \u201cPh\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng d\u1ef1a tr\u00ean s\u1ef1 c\u00f4 l\u1eadp\u201d. B\u00e0i b\u00e1o n\u00e0y tr\u00ecnh b\u00e0y \u00fd t\u01b0\u1edfng s\u1eed d\u1ee5ng c\u00e1ch ly \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng trong c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. K\u1ec3 t\u1eeb \u0111\u00f3, Isolation Forest \u0111\u00e3 thu h\u00fat \u0111\u01b0\u1ee3c s\u1ef1 ch\u00fa \u00fd \u0111\u00e1ng k\u1ec3 trong l\u0129nh v\u1ef1c ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng do t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 R\u1eebng C\u00e1ch Ly<\/h2>\n<p>R\u1eebng c\u00e1ch ly l\u00e0 m\u1ed9t lo\u1ea1i thu\u1eadt to\u00e1n h\u1ecdc t\u1eadp kh\u00f4ng gi\u00e1m s\u00e1t thu\u1ed9c nh\u00f3m h\u1ecdc t\u1eadp t\u1ed5ng h\u1ee3p. N\u00f3 th\u00fac \u0111\u1ea9y kh\u00e1i ni\u1ec7m r\u1eebng ng\u1eabu nhi\u00ean, n\u01a1i nhi\u1ec1u c\u00e2y quy\u1ebft \u0111\u1ecbnh \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p \u0111\u1ec3 \u0111\u01b0a ra d\u1ef1 \u0111o\u00e1n. Tuy nhi\u00ean, trong tr\u01b0\u1eddng h\u1ee3p R\u1eebng C\u00e1ch Ly, c\u00e2y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1c.<\/p>\n<p>Thu\u1eadt to\u00e1n ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e2n chia \u0111\u1ec7 quy c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u th\u00e0nh c\u00e1c t\u1eadp con cho \u0111\u1ebfn khi m\u1ed7i \u0111i\u1ec3m d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u00e1ch bi\u1ec7t trong l\u00e1 c\u00e2y c\u1ee7a ch\u00ednh n\u00f3. Trong qu\u00e1 tr\u00ecnh n\u00e0y, s\u1ed1 l\u01b0\u1ee3ng ph\u00e2n v\u00f9ng c\u1ea7n thi\u1ebft \u0111\u1ec3 c\u00e1ch ly m\u1ed9t \u0111i\u1ec3m d\u1eef li\u1ec7u s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t ch\u1ec9 b\u00e1o cho bi\u1ebft li\u1ec7u \u0111\u00f3 c\u00f3 ph\u1ea3i l\u00e0 \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng hay kh\u00f4ng. D\u1ef1 ki\u1ebfn, c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng s\u1ebd c\u00f3 \u0111\u01b0\u1eddng d\u1eabn c\u00e1ch ly ng\u1eafn h\u01a1n, trong khi c\u00e1c tr\u01b0\u1eddng h\u1ee3p b\u00ecnh th\u01b0\u1eddng s\u1ebd m\u1ea5t nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 c\u00e1ch ly.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a R\u1eebng C\u00e1ch Ly. R\u1eebng c\u00e1ch ly ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<p>Thu\u1eadt to\u00e1n Isolation Forest c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ol>\n<li><strong>L\u1ef1a ch\u1ecdn ng\u1eabu nhi\u00ean:<\/strong> Ch\u1ecdn ng\u1eabu nhi\u00ean m\u1ed9t t\u00ednh n\u0103ng v\u00e0 gi\u00e1 tr\u1ecb ph\u00e2n t\u00e1ch \u0111\u1ec3 t\u1ea1o ph\u00e2n v\u00f9ng gi\u1eefa gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a c\u1ee7a t\u00ednh n\u0103ng \u0111\u01b0\u1ee3c ch\u1ecdn.<\/li>\n<li><strong>Ph\u00e2n v\u00f9ng \u0111\u1ec7 quy:<\/strong> Ti\u1ebfp t\u1ee5c ph\u00e2n v\u00f9ng d\u1eef li\u1ec7u theo c\u00e1ch \u0111\u1ec7 quy b\u1eb1ng c\u00e1ch ch\u1ecdn c\u00e1c t\u00ednh n\u0103ng ng\u1eabu nhi\u00ean v\u00e0 ph\u00e2n chia c\u00e1c gi\u00e1 tr\u1ecb cho \u0111\u1ebfn khi m\u1ed7i \u0111i\u1ec3m d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u00e1ch bi\u1ec7t trong l\u00e1 c\u00e2y c\u1ee7a ch\u00ednh n\u00f3.<\/li>\n<li><strong>T\u00ednh to\u00e1n \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng d\u1eabn:<\/strong> \u0110\u1ed1i v\u1edbi m\u1ed7i \u0111i\u1ec3m d\u1eef li\u1ec7u, h\u00e3y t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng d\u1eabn t\u1eeb n\u00fat g\u1ed1c \u0111\u1ebfn n\u00fat l\u00e1. C\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng d\u1eabn ng\u1eafn h\u01a1n.<\/li>\n<li><strong>\u0110i\u1ec3m b\u1ea5t th\u01b0\u1eddng:<\/strong> Ch\u1ec9 \u0111\u1ecbnh \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng d\u1ef1a tr\u00ean \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng d\u1eabn \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n. C\u00e1c \u0111\u01b0\u1eddng d\u1eabn ng\u1eafn h\u01a1n nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng cao h\u01a1n, cho th\u1ea5y r\u1eb1ng ch\u00fang c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng l\u00e0 c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng h\u01a1n.<\/li>\n<li><strong>Ng\u01b0\u1ee1ng:<\/strong> \u0110\u1eb7t ng\u01b0\u1ee1ng cho \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m d\u1eef li\u1ec7u n\u00e0o \u0111\u01b0\u1ee3c coi l\u00e0 b\u1ea5t th\u01b0\u1eddng.<\/li>\n<\/ol>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a R\u1eebng c\u00e1ch ly<\/h2>\n<p>R\u1eebng c\u00e1ch ly s\u1edf h\u1eefu 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 \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng:<\/p>\n<ul>\n<li><strong>Hi\u1ec7u qu\u1ea3:<\/strong> R\u1eebng c\u00e1ch ly c\u00f3 hi\u1ec7u qu\u1ea3 t\u00ednh to\u00e1n v\u00e0 c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. \u0110\u1ed9 ph\u1ee9c t\u1ea1p th\u1eddi gian trung b\u00ecnh c\u1ee7a n\u00f3 x\u1ea5p x\u1ec9 O(n log n), trong \u0111\u00f3 n l\u00e0 s\u1ed1 \u0111i\u1ec3m d\u1eef li\u1ec7u.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong> Hi\u1ec7u qu\u1ea3 c\u1ee7a thu\u1eadt to\u00e1n cho ph\u00e9p n\u00f3 m\u1edf r\u1ed9ng quy m\u00f4 t\u1ed1t sang d\u1eef li\u1ec7u nhi\u1ec1u chi\u1ec1u, khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 nhi\u1ec1u t\u00ednh n\u0103ng.<\/li>\n<li><strong>M\u1ea1nh m\u1ebd \u0111\u1ebfn c\u00e1c ngo\u1ea1i l\u1ec7:<\/strong> R\u1eebng c\u00e1ch ly ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh m\u1ebd tr\u01b0\u1edbc s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb ngo\u1ea1i l\u1ec7 v\u00e0 nhi\u1ec5u trong d\u1eef li\u1ec7u. C\u00e1c ngo\u1ea1i l\u1ec7 c\u00f3 xu h\u01b0\u1edbng \u0111\u01b0\u1ee3c t\u00e1ch bi\u1ec7t nhanh h\u01a1n, gi\u1ea3m t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang \u0111\u1ebfn qu\u00e1 tr\u00ecnh ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng t\u1ed5ng th\u1ec3.<\/li>\n<li><strong>Kh\u00f4ng c\u00f3 gi\u1ea3 \u0111\u1ecbnh v\u1ec1 ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u:<\/strong> Kh\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng kh\u00e1c gi\u1ea3 \u0111\u1ecbnh d\u1eef li\u1ec7u tu\u00e2n theo m\u1ed9t ph\u00e2n ph\u1ed1i c\u1ee5 th\u1ec3, R\u1eebng c\u00e1ch ly kh\u00f4ng \u0111\u01b0a ra b\u1ea5t k\u1ef3 gi\u1ea3 \u0111\u1ecbnh ph\u00e2n ph\u1ed1i n\u00e0o, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean linh ho\u1ea1t h\u01a1n.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i r\u1eebng bi\u1ec7t l\u1eadp<\/h2>\n<p>Kh\u00f4ng c\u00f3 bi\u1ebfn th\u1ec3 ri\u00eang bi\u1ec7t n\u00e0o c\u1ee7a R\u1eebng C\u00e1ch ly, nh\u01b0ng m\u1ed9t s\u1ed1 s\u1eeda \u0111\u1ed5i v\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ho\u1eb7c th\u00e1ch th\u1ee9c c\u1ee5 th\u1ec3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 bi\u1ebfn th\u1ec3 \u0111\u00e1ng ch\u00fa \u00fd:<\/p>\n<ol>\n<li><strong>R\u1eebng c\u00e1ch ly m\u1edf r\u1ed9ng:<\/strong> M\u1ed9t bi\u1ebfn th\u1ec3 c\u1ee7a R\u1eebng c\u00e1ch ly m\u1edf r\u1ed9ng kh\u00e1i ni\u1ec7m ban \u0111\u1ea7u \u0111\u1ec3 xem x\u00e9t th\u00f4ng tin theo ng\u1eef c\u1ea3nh, h\u1eefu \u00edch cho d\u1eef li\u1ec7u chu\u1ed7i th\u1eddi gian.<\/li>\n<li><strong>R\u1eebng c\u00e1ch ly gia t\u0103ng:<\/strong> Bi\u1ebfn th\u1ec3 n\u00e0y cho ph\u00e9p thu\u1eadt to\u00e1n c\u1eadp nh\u1eadt m\u00f4 h\u00ecnh d\u1ea7n d\u1ea7n khi c\u00f3 d\u1eef li\u1ec7u m\u1edbi m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111\u00e0o t\u1ea1o l\u1ea1i to\u00e0n b\u1ed9 m\u00f4 h\u00ecnh.<\/li>\n<li><strong>R\u1eebng c\u00e1ch ly b\u00e1n gi\u00e1m s\u00e1t:<\/strong> Trong phi\u00ean b\u1ea3n n\u00e0y, m\u1ed9t s\u1ed1 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn qu\u00e1 tr\u00ecnh c\u00e1ch ly, k\u1ebft h\u1ee3p c\u00e1c nguy\u00ean t\u1eafc h\u1ecdc t\u1eadp kh\u00f4ng gi\u00e1m s\u00e1t v\u00e0 gi\u00e1m s\u00e1t.<\/li>\n<\/ol>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng R\u1eebng c\u00e1ch ly, 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>R\u1eebng c\u00e1ch ly t\u00ecm th\u1ea5y c\u00e1c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c ngo\u1ea1i l\u1ec7 v\u00e0 s\u1ef1 b\u1ea5t th\u01b0\u1eddng trong d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 giao d\u1ecbch gian l\u1eadn, x\u00e2m nh\u1eadp m\u1ea1ng ho\u1eb7c l\u1ed7i thi\u1ebft b\u1ecb.<\/li>\n<li><strong>Ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp:<\/strong> Ph\u00e1t hi\u1ec7n s\u1ef1 truy c\u1eadp tr\u00e1i ph\u00e9p ho\u1eb7c c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng ng\u1edd trong m\u1ea1ng m\u00e1y t\u00ednh.<\/li>\n<li><strong>Ph\u00e1t hi\u1ec7n gian l\u1eadn:<\/strong> Ph\u00e1t hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng gian l\u1eadn trong giao d\u1ecbch t\u00e0i ch\u00ednh.<\/li>\n<li><strong>Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng:<\/strong> Gi\u00e1m s\u00e1t qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ea3n ph\u1ea9m b\u1ecb l\u1ed7i.<\/li>\n<\/ul>\n<p>M\u1eb7c d\u00f9 R\u1eebng c\u00e1ch ly l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng hi\u1ec7u qu\u1ea3 nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c:<\/p>\n<ul>\n<li><strong>D\u1eef li\u1ec7u chi\u1ec1u cao:<\/strong> Khi chi\u1ec1u d\u1eef li\u1ec7u t\u0103ng l\u00ean, qu\u00e1 tr\u00ecnh c\u00e1ch ly tr\u1edf n\u00ean k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n. K\u1ef9 thu\u1eadt gi\u1ea3m k\u00edch th\u01b0\u1edbc c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/li>\n<li><strong>M\u1ea5t c\u00e2n b\u1eb1ng d\u1eef li\u1ec7u:<\/strong> Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p hi\u1ebfm khi x\u1ea3y ra d\u1ecb th\u01b0\u1eddng so v\u1edbi c\u00e1c tr\u01b0\u1eddng h\u1ee3p b\u00ecnh th\u01b0\u1eddng, R\u1eebng C\u00e1ch ly c\u00f3 th\u1ec3 g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c c\u00e1ch ly ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. C\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 l\u1ea5y m\u1eabu qu\u00e1 m\u1ee9c ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh ng\u01b0\u1ee1ng b\u1ea5t th\u01b0\u1eddng c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\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 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0111\u1eb7c tr\u01b0ng<\/th>\n<th>R\u1eebng C\u00e1ch Ly<\/th>\n<th>SVM m\u1ed9t l\u1edbp<\/th>\n<th>Y\u1ebfu t\u1ed1 ngo\u1ea1i l\u1ec7 c\u1ee5c b\u1ed9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>H\u1ecdc t\u1eadp c\u00f3 gi\u00e1m s\u00e1t?<\/td>\n<td>KH\u00d4NG<\/td>\n<td>KH\u00d4NG<\/td>\n<td>KH\u00d4NG<\/td>\n<\/tr>\n<tr>\n<td>Ph\u00e2n ph\u1ed1i d\u1eef li\u1ec7u<\/td>\n<td>B\u1ea5t k\u00ec<\/td>\n<td>B\u1ea5t k\u00ec<\/td>\n<td>Ch\u1ee7 y\u1ebfu l\u00e0 Gaussian<\/td>\n<\/tr>\n<tr>\n<td>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/td>\n<td>Cao<\/td>\n<td>Trung b\u00ecnh \u0111\u1ebfn cao<\/td>\n<td>Trung b\u00ecnh \u0111\u1ebfn cao<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec1u ch\u1ec9nh tham s\u1ed1<\/td>\n<td>T\u1ed1i thi\u1ec3u<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<td>T\u1ed1i thi\u1ec3u<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 nh\u1ea1y ngo\u1ea1i l\u1ec7<\/td>\n<td>Th\u1ea5p<\/td>\n<td>Cao<\/td>\n<td>V\u1eeba ph\u1ea3i<\/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 R\u1eebng c\u00e1ch ly<\/h2>\n<p>R\u1eebng c\u00e1ch ly c\u00f3 th\u1ec3 s\u1ebd ti\u1ebfp t\u1ee5c l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng, v\u00ec t\u00ednh hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3 khi\u1ebfn n\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng quy m\u00f4 l\u1edbn. Nh\u1eefng ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Song song h\u00f3a:<\/strong> S\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt x\u1eed l\u00fd song song v\u00e0 t\u00ednh to\u00e1n ph\u00e2n t\u00e1n \u0111\u1ec3 n\u00e2ng cao h\u01a1n n\u1eefa kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a n\u00f3.<\/li>\n<li><strong>Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn lai:<\/strong> K\u1ebft h\u1ee3p R\u1eebng c\u00e1ch ly v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng kh\u00e1c \u0111\u1ec3 t\u1ea1o ra c\u00e1c m\u00f4 h\u00ecnh m\u1ea1nh m\u1ebd v\u00e0 ch\u00ednh x\u00e1c h\u01a1n.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng gi\u1ea3i th\u00edch:<\/strong> N\u1ed7 l\u1ef1c n\u00e2ng cao kh\u1ea3 n\u0103ng di\u1ec5n gi\u1ea3i c\u1ee7a R\u1eebng c\u00e1ch ly v\u00e0 hi\u1ec3u l\u00fd do \u0111\u1eb1ng sau \u0111i\u1ec3m s\u1ed1 b\u1ea5t th\u01b0\u1eddng.<\/li>\n<\/ul>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi Isolation Forest<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt tr\u00ean internet. B\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng c\u1ee7a Isolation Forest, c\u00e1c nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy c\u00f3 th\u1ec3 n\u00e2ng cao c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt c\u1ee7a h\u1ecd. V\u00ed d\u1ee5:<\/p>\n<ul>\n<li><strong>Ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng trong Nh\u1eadt k\u00fd truy c\u1eadp:<\/strong> R\u1eebng c\u00e1ch ly c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch nh\u1eadt k\u00fd truy c\u1eadp v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng ng\u1edd ho\u1eb7c \u0111\u1ed9c h\u1ea1i \u0111ang c\u1ed1 g\u1eafng v\u01b0\u1ee3t qua c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt.<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh proxy v\u00e0 VPN:<\/strong> Isolation Forest c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n bi\u1ec7t ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p v\u1edbi nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng ti\u1ec1m n\u0103ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng proxy ho\u1eb7c VPN \u0111\u1ec3 che gi\u1ea5u danh t\u00ednh c\u1ee7a h\u1ecd.<\/li>\n<li><strong>Ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n m\u1ed1i \u0111e d\u1ecda:<\/strong> B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng R\u1eebng c\u00e1ch ly trong th\u1eddi gian th\u1ef1c, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c m\u1ed1i \u0111e d\u1ecda ti\u1ec1m \u1ea9n, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS v\u00e0 c\u00e1c n\u1ed7 l\u1ef1c b\u1ea1o l\u1ef1c.<\/li>\n<\/ul>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 R\u1eebng c\u00e1ch ly, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/cs.nju.edu.cn\/zhouzh\/zhouzh.files\/publication\/icdm08b.pdf\" target=\"_new\" rel=\"noopener nofollow\">Ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng d\u1ef1a tr\u00ean s\u1ef1 c\u00f4 l\u1eadp (B\u00e0i nghi\u00ean c\u1ee9u)<\/a><\/li>\n<li><a href=\"https:\/\/scikit-learn.org\/stable\/modules\/generated\/sklearn.ensemble.IsolationForest.html\" target=\"_new\" rel=\"noopener nofollow\">T\u00e0i li\u1ec7u Scikit-learn v\u1ec1 R\u1eebng c\u00e1ch ly<\/a><\/li>\n<li><a href=\"https:\/\/towardsdatascience.com\/outlier-detection-with-isolation-forest-3d190448d45e\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng t\u1edbi khoa h\u1ecdc d\u1eef li\u1ec7u - Gi\u1edbi thi\u1ec7u v\u1ec1 R\u1eebng bi\u1ec7t l\u1eadp<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/blog\/isolation-forest-enhanced-security\/\" target=\"_new\" rel=\"noopener\">Blog OneProxy \u2013 S\u1eed d\u1ee5ng R\u1eebng c\u00e1ch ly \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt<\/a><\/li>\n<\/ol>\n<p>T\u00f3m l\u1ea1i, R\u1eebng c\u00e1ch ly \u0111\u00e3 c\u00e1ch m\u1ea1ng h\u00f3a vi\u1ec7c ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng b\u1eb1ng c\u00e1ch gi\u1edbi thi\u1ec7u m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn m\u1edbi v\u00e0 hi\u1ec7u qu\u1ea3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c ngo\u1ea1i l\u1ec7 v\u00e0 s\u1ef1 b\u1ea5t th\u01b0\u1eddng trong c\u00e1c b\u1ed9 d\u1eef li\u1ec7u l\u1edbn. T\u00ednh linh ho\u1ea1t, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 kh\u1ea3 n\u0103ng x\u1eed l\u00fd d\u1eef li\u1ec7u nhi\u1ec1u chi\u1ec1u khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 c\u00f3 gi\u00e1 tr\u1ecb trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau, bao g\u1ed3m c\u1ea3 b\u1ea3o m\u1eadt m\u00e1y ch\u1ee7 proxy. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, Isolation Forest c\u00f3 th\u1ec3 v\u1eabn l\u00e0 nh\u00e2n t\u1ed1 ch\u1ee7 ch\u1ed1t trong l\u0129nh v\u1ef1c ph\u00e1t hi\u1ec7n s\u1ef1 b\u1ea5t th\u01b0\u1eddng, th\u00fac \u0111\u1ea9y nh\u1eefng ti\u1ebfn b\u1ed9 v\u1ec1 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 trong nhi\u1ec1u ng\u00e0nh kh\u00e1c nhau.<\/p>","protected":false},"featured_media":505895,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477726","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Isolation Forest: An Innovative Approach to Anomaly Detection<\/mark>","faq_items":[{"question":"What is Isolation Forest and how does it work?","answer":"Isolation Forest is a machine learning algorithm used for anomaly detection. Unlike traditional methods, Isolation Forest isolates anomalies directly by recursively partitioning data points into subsets until each data point is in its own tree leaf. Shorter paths to isolation indicate anomalies, while longer paths represent normal instances."},{"question":"When was Isolation Forest introduced?","answer":"Isolation Forest was first introduced in 2008 by Fei Tony Liu, Kai Ming Ting, and Zhi-Hua Zhou in their paper \"Isolation-Based Anomaly Detection.\""},{"question":"What are the key features of Isolation Forest?","answer":"Isolation Forest is known for its efficiency, scalability, and robustness to outliers. It requires minimal parameter tuning and doesn't assume any specific data distribution."},{"question":"What are the types of Isolation Forest?","answer":"There are no distinct types, but some adaptations include Extended Isolation Forest, Incremental Isolation Forest, and Semi-Supervised Isolation Forest."},{"question":"How is Isolation Forest used for anomaly detection?","answer":"Isolation Forest finds applications in anomaly detection, intrusion detection, fraud detection, and quality control. It identifies outliers and anomalies in various datasets."},{"question":"What challenges might Isolation Forest face?","answer":"Isolation Forest might face challenges with high-dimensional data and data imbalance. Techniques like dimensionality reduction and threshold adjustments can address these issues."},{"question":"How does Isolation Forest compare to other anomaly detection methods?","answer":"Isolation Forest outperforms One-Class SVM and Local Outlier Factor in terms of efficiency, scalability, and outlier sensitivity."},{"question":"What is the future outlook for Isolation Forest?","answer":"The future of Isolation Forest may involve parallelization, hybrid approaches, and efforts to enhance interpretability for even better anomaly detection."},{"question":"How can proxy servers benefit from Isolation Forest?","answer":"Proxy servers can enhance security measures using Isolation Forest for anomaly detection in access logs, identifying proxies and VPNs, and preventing potential threats like DDoS attacks."}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477726","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":1,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477726\/revisions"}],"predecessor-version":[{"id":505896,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477726\/revisions\/505896"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/505895"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}