{"id":26482,"date":"2025-04-02T13:09:18","date_gmt":"2025-04-02T06:09:18","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=26482"},"modified":"2025-04-02T13:09:18","modified_gmt":"2025-04-02T06:09:18","slug":"fasttext-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/","title":{"rendered":"fastText l\u00e0 g\u00ec? \u1ee8ng d\u1ee5ng fastText trong x\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#fastText-la-gi\" >fastText l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Mot-vi-du-don-gian-ve-fastText\" >M\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n v\u1ec1 fastText<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#fastText-hoat-dong-nhu-the-nao\" >fastText ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Mo-hinh-Skip-gram-va-Continuous-Bag-of-Words-CBOW\" >M\u00f4 h\u00ecnh Skip-gram v\u00e0 Continuous Bag-of-Words (CBOW)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Hierarchical-Softmax-va-Negative-Sampling-trong-fastText\" >Hierarchical Softmax v\u00e0 Negative Sampling trong fastText<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Tinh-nang-noi-bat-cua-thu-vien-fastText\" >T\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a th\u01b0 vi\u1ec7n fastText\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Su-khac-biet-giua-fastText-va-Word2Vec\" >S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa fastText v\u00e0 Word2Vec<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Xu-ly-cac-tu-ngoai-tu-vung-OOV\" >X\u1eed l\u00fd c\u00e1c t\u1eeb ngo\u00e0i t\u1eeb v\u1ef1ng (OOV)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Co-che-hoat-dong\" >C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Bieu-dien-tu-ngu\" >Bi\u1ec3u di\u1ec5n t\u1eeb ng\u1eef<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Hieu-qua-huan-luyen\" >Hi\u1ec7u qu\u1ea3 hu\u1ea5n luy\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Ung-dung\" >\u1ee8ng d\u1ee5ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Ung-dung-thuc-te-cua-fastText\" >\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a fastText<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Phan-loai-va-phan-loai-van-ban\" >Ph\u00e2n lo\u1ea1i v\u00e0 ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Nhan-dien-ngon-ngu-va-dich-thuat\" >Nh\u1eadn di\u1ec7n ng\u00f4n ng\u1eef v\u00e0 d\u1ecbch thu\u1eadt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Phan-tich-cam-xuc-va-khai-thac-y-kien\" >Ph\u00e2n t\u00edch c\u1ea3m x\u00fac v\u00e0 khai th\u00e1c \u00fd ki\u1ebfn<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/fasttext-la-gi\/#Nhan-dien-thuc-the-va-gan-the\" >Nh\u1eadn di\u1ec7n th\u1ef1c th\u1ec3 v\u00e0 g\u1eafn th\u1ebb<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>fastText, m\u1ed9t s\u1ea3n ph\u1ea9m c\u1ee7a Facebook AI Research (FAIR), \u0111\u00e3 mang \u0111\u1ebfn m\u1ed9t b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong l\u0129nh v\u1ef1c x\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean (NLP). V\u1edbi kh\u1ea3 n\u0103ng x\u1eed l\u00fd th\u00f4ng tin subword v\u00e0 hi\u1ec7u qu\u1ea3 v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c h\u1ecdc t\u1eeb v\u1ef1ng, fastText \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng NLP. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5<a href=\"https:\/\/interdata.vn\/blog\/fastText-la-gi\/\"><strong> fastText l\u00e0 g\u00ec<\/strong><\/a>, c\u00e1ch n\u00f3 ho\u1ea1t \u0111\u1ed9ng v\u00e0 nh\u1eefng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a n\u00f3 trong ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n, nh\u1eadn di\u1ec7n ng\u00f4n ng\u1eef, ph\u00e2n t\u00edch c\u1ea3m x\u00fac, v\u00e0 nhi\u1ec1u h\u01a1n n\u1eefa.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"fastText-la-gi\"><\/span><strong>fastText l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>fastText, m\u1ed9t s\u1ea3n ph\u1ea9m c\u1ee7a nh\u00f3m Nghi\u00ean c\u1ee9u AI (FAIR) c\u1ee7a Facebook, l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong l\u0129nh v\u1ef1c x\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean (NLP)<\/strong>. Th\u01b0 vi\u1ec7n n\u00e0y, \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o n\u0103m 2016, x\u00e2y d\u1ef1ng tr\u00ean n\u1ec1n t\u1ea3ng c\u1ee7a Word2Vec \u0111\u1ed3ng th\u1eddi mang l\u1ea1i nh\u1eefng \u0111\u1ed5i m\u1edbi quan tr\u1ecdng.<\/p>\n<p>Kh\u00e1c v\u1edbi c\u00e1c m\u00f4 h\u00ecnh embedding t\u1eeb truy\u1ec1n th\u1ed1ng, th\u01b0 vi\u1ec7n fastText ho\u1ea1t \u0111\u1ed9ng \u1edf c\u1ea5p \u0111\u1ed9 subword (ti\u1ec3u t\u1eeb), s\u1eed d\u1ee5ng n-gram k\u00fd t\u1ef1 \u0111\u1ec3 n\u1eafm b\u1eaft c\u00e1c s\u1eafc th\u00e1i h\u00ecnh th\u00e1i h\u1ecdc. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 l\u1ee3i th\u1ebf r\u00f5 r\u1ec7t trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c t\u1eeb v\u1ef1ng ngo\u00e0i t\u1eeb \u0111i\u1ec3n (out-of-vocabulary) v\u00e0 h\u1ed7 tr\u1ee3 c\u00e1c ng\u00f4n ng\u1eef c\u00f3 c\u1ea5u tr\u00fac h\u00ecnh th\u00e1i ph\u1ee9c t\u1ea1p.<\/p>\n<p>fastText t\u00edch h\u1ee3p c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 Hierarchical Softmax v\u00e0 Negative Sampling, gi\u00fap<strong> t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n<\/strong> v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 t\u00ednh to\u00e1n. K\u1ec3 t\u1eeb khi ra \u0111\u1eddi, fastText \u0111\u00e3 ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, th\u00edch \u1ee9ng v\u1edbi nh\u1eefng xu h\u01b0\u1edbng v\u00e0 kh\u00e1m ph\u00e1 m\u1edbi trong nghi\u00ean c\u1ee9u NLP, c\u1ee7ng c\u1ed1 v\u1ecb th\u1ebf c\u1ee7a m\u00ecnh nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu.<\/p>\n<figure id=\"attachment_26487\" aria-describedby=\"caption-attachment-26487\" style=\"width: 790px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-la-gi.jpg\" alt=\"fastText l\u00e0 g\u00ec\" width=\"790\" height=\"478\" class=\"size-full wp-image-26487\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-la-gi.jpg 790w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-la-gi-300x182.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-la-gi-768x465.jpg 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-la-gi-750x454.jpg 750w\" sizes=\"auto, (max-width: 790px) 100vw, 790px\" \/><figcaption id=\"caption-attachment-26487\" class=\"wp-caption-text\">fastText l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>M\u1ed9t trong nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a th\u01b0 vi\u1ec7n fastText l\u00e0<strong> t\u1ed1c \u0111\u1ed9 v\u00e0 hi\u1ec7u qu\u1ea3 v\u01b0\u1ee3t tr\u1ed9i<\/strong>. Thi\u1ebft k\u1ebf c\u1ee7a n\u00f3 gi\u00fap hu\u1ea5n luy\u1ec7n nhanh ch\u00f3ng tr\u00ean c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn, l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c v\u00e0 c\u00e1c b\u1ed9 d\u1eef li\u1ec7u quy m\u00f4 l\u1edbn.<\/p>\n<p>H\u01a1n n\u1eefa, <strong>kh\u1ea3 n\u0103ng t\u1ea1o ra embeddings cho c\u00e1c \u0111\u01a1n v\u1ecb subword<\/strong> gi\u00fap n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng c\u1ee7a n\u00f3, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p li\u00ean quan \u0111\u1ebfn c\u00e1c t\u1eeb hi\u1ebfm ho\u1eb7c ch\u01b0a t\u1eebng g\u1eb7p. Thu\u1ed9c t\u00ednh n\u00e0y r\u1ea5t c\u00f3 gi\u00e1 tr\u1ecb trong c\u00e1c ng\u1eef c\u1ea3nh ng\u00f4n ng\u1eef \u0111a d\u1ea1ng v\u00e0 c\u00e1c l\u0129nh v\u1ef1c chuy\u00ean bi\u1ec7t.<\/p>\n<p>Ngo\u00e0i vi\u1ec7c t\u1ea1o embeddings t\u1eeb c\u00e1c t\u1eeb, fastText c\u00f2n r\u1ea5t h\u1eefu \u00edch trong c\u00e1c nhi\u1ec7m v\u1ee5 ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n, bao g\u1ed3m ph\u00e2n t\u00edch c\u1ea3m x\u00fac, m\u00f4 h\u00ecnh h\u00f3a ch\u1ee7 \u0111\u1ec1 v\u00e0 ph\u00e2n lo\u1ea1i t\u00e0i li\u1ec7u. L\u00e0 m\u1ed9t th\u01b0 vi\u1ec7n <a href=\"https:\/\/interdata.vn\/blog\/source-code-la-gi\/\">m\u00e3 ngu\u1ed3n<\/a> m\u1edf, fastText th\u00fac \u0111\u1ea9y s\u1ef1 h\u1ee3p t\u00e1c, kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn v\u00e0 s\u1ef1 c\u1ea3i ti\u1ebfn li\u00ean t\u1ee5c trong c\u1ed9ng \u0111\u1ed3ng NLP.<\/p>\n<p>S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa c\u00e1c k\u1ef9 thu\u1eadt \u0111\u1ed5i m\u1edbi, hi\u1ec7u qu\u1ea3 v\u00e0 t\u00ednh linh ho\u1ea1t gi\u00fap fastText tr\u1edf th\u00e0nh m\u1ed9t t\u00e0i s\u1ea3n quan tr\u1ecdng trong b\u1ed9 c\u00f4ng c\u1ee5 NLP.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Mot-vi-du-don-gian-ve-fastText\"><\/span><strong>M\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n v\u1ec1 fastText<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng fastText l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 h\u1ecdc c\u00e1ch hi\u1ec3u c\u00e1c t\u1eeb b\u1eb1ng c\u00e1ch chia ch\u00fang th\u00e0nh c\u00e1c ph\u1ea7n nh\u1ecf h\u01a1n.<\/p>\n<p>V\u00ed d\u1ee5, h\u00e3y l\u1ea5y t\u1eeb &#8220;apple&#8221;. Thay v\u00ec xem n\u00f3 nh\u01b0 m\u1ed9t th\u1ef1c th\u1ec3 \u0111\u01a1n l\u1ebb, fastText ph\u00e2n t\u00e1ch n\u00f3 th\u00e0nh c\u00e1c th\u00e0nh ph\u1ea7n nh\u1ecf g\u1ecdi l\u00e0 n-gram k\u00fd t\u1ef1, nh\u01b0 \u2018ap\u2019, \u2018pp\u2019, \u2018pl\u2019, \u2018le\u2019, v.v. Nh\u1eefng m\u1ea3nh k\u00fd t\u1ef1 n\u00e0y, hay c\u00f2n g\u1ecdi l\u00e0 \u0111\u01a1n v\u1ecb subword, gi\u00fap fastText hi\u1ec3u c\u1ea5u tr\u00fac v\u00e0 \u00fd ngh\u0129a c\u1ee7a t\u1eeb.<\/p>\n<p>B\u1eb1ng c\u00e1ch h\u1ecdc t\u1eeb m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u l\u1edbn c\u00e1c t\u1eeb v\u00e0 ng\u1eef c\u1ea3nh c\u1ee7a ch\u00fang, fastText <strong>n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c \u0111\u01a1n v\u1ecb subword<\/strong> v\u00e0 c\u00e1ch ch\u00fang k\u1ebft h\u1ee3p \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u00e1c t\u1eeb. Ki\u1ebfn th\u1ee9c n\u00e0y gi\u00fap fastText \u0111\u1ea1i di\u1ec7n cho c\u00e1c t\u1eeb \u0111\u00e3 bi\u1ebft c\u0169ng nh\u01b0 c\u00e1c t\u1eeb ch\u01b0a g\u1eb7p ho\u1eb7c hi\u1ebfm g\u1eb7p b\u1eb1ng c\u00e1ch xem x\u00e9t c\u00e1c th\u00e0nh ph\u1ea7n subword c\u1ee7a ch\u00fang.<\/p>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho ph\u00e9p fastText t\u1ea1o ra c\u00e1c embeddings v\u00e0 \u0111\u1ea1i di\u1ec7n s\u1ed1 c\u1ee7a c\u00e1c t\u1eeb d\u1ef1a tr\u00ean th\u00f4ng tin subword c\u1ee7a ch\u00fang. Nh\u1eefng embeddings n\u00e0y n\u1eafm b\u1eaft s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng v\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c t\u1eeb, gi\u00fap th\u01b0 vi\u1ec7n fastText tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c nh\u1eadn di\u1ec7n ng\u00f4n ng\u1eef, ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n v\u00e0 x\u1eed l\u00fd c\u00e1c ng\u00f4n ng\u1eef phong ph\u00fa v\u1ec1 h\u00ecnh th\u00e1i h\u1ecdc ho\u1eb7c c\u00e1c t\u1eeb v\u1ef1ng chuy\u00ean bi\u1ec7t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"fastText-hoat-dong-nhu-the-nao\"><\/span><strong>fastText ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>C\u00e1c embeddings t\u1eeb trong NLP\u00a0<\/strong><\/p>\n<p>Embeddings t\u1eeb l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a nhi\u1ec1u \u1ee9ng d\u1ee5ng NLP, gi\u00fap <strong>bi\u1ec3u di\u1ec5n c\u00e1c t\u1eeb d\u01b0\u1edbi d\u1ea1ng c\u00e1c vector li\u00ean t\u1ee5c<\/strong> trong kh\u00f4ng gian \u0111a chi\u1ec1u. Nh\u1eefng embeddings n\u00e0y n\u1eafm b\u1eaft m\u1ed1i quan h\u1ec7 ng\u1eef ngh\u0129a gi\u1eefa c\u00e1c t\u1eeb, cho ph\u00e9p c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/thuat-toan-algorithm\/\">thu\u1eadt to\u00e1n<\/a> x\u1eed l\u00fd v\u00e0 hi\u1ec3u ng\u00f4n ng\u1eef m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p>fastText, gi\u1ed1ng nh\u01b0 c\u00e1c ti\u1ec1n th\u00e2n c\u1ee7a n\u00f3, xu\u1ea5t s\u1eafc trong vi\u1ec7c t\u1ea1o ra nh\u1eefng embeddings n\u00e0y nh\u01b0ng n\u1ed5i b\u1eadt nh\u1edd c\u00e1ch ti\u1ebfp c\u1eadn \u1edf c\u1ea5p \u0111\u1ed9 subword.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mo-hinh-Skip-gram-va-Continuous-Bag-of-Words-CBOW\"><\/span><strong>M\u00f4 h\u00ecnh Skip-gram v\u00e0 Continuous Bag-of-Words (CBOW)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>fastText s\u1eed d\u1ee5ng hai m\u00f4 h\u00ecnh ch\u00ednh: Skip-gram v\u00e0 Continuous Bag-of-Words (CBOW). M\u00f4 h\u00ecnh Skip-gram d\u1ef1 \u0111o\u00e1n c\u00e1c t\u1eeb ng\u1eef c\u1ea3nh d\u1ef1a tr\u00ean m\u1ed9t t\u1eeb trung t\u00e2m, trong khi CBOW d\u1ef1 \u0111o\u00e1n t\u1eeb trung t\u00e2m d\u1ef1a tr\u00ean ng\u1eef c\u1ea3nh c\u1ee7a n\u00f3.<\/p>\n<p>Tuy nhi\u00ean, th\u01b0 vi\u1ec7n fastText mang \u0111\u1ebfn m\u1ed9t s\u1ef1 thay \u0111\u1ed5i quan tr\u1ecdng b\u1eb1ng c\u00e1ch coi c\u00e1c t\u1eeb l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c n-gram k\u00fd t\u1ef1, gi\u00fap t\u1ea1o ra c\u00e1c bi\u1ec3u di\u1ec5n cho c\u00e1c t\u1eeb d\u1ef1a tr\u00ean c\u00e1c \u0111\u01a1n v\u1ecb subword n\u00e0y.<\/p>\n<p>C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y cho ph\u00e9p m\u00f4 h\u00ecnh hi\u1ec3u v\u00e0 t\u1ea1o embeddings cho nh\u1eefng t\u1eeb ch\u01b0a g\u1eb7p trong d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n, mang l\u1ea1i l\u1ee3i th\u1ebf l\u1edbn trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c ng\u00f4n ng\u1eef phong ph\u00fa v\u1ec1 h\u00ecnh th\u00e1i h\u1ecdc v\u00e0 c\u00e1c t\u1eeb hi\u1ebfm.<\/p>\n<figure id=\"attachment_26486\" aria-describedby=\"caption-attachment-26486\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-hoat-dong-nhu-the-nao.webp\" alt=\"fastText ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o\" width=\"1024\" height=\"576\" class=\"size-full wp-image-26486\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-hoat-dong-nhu-the-nao.webp 1024w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-hoat-dong-nhu-the-nao-300x169.webp 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-hoat-dong-nhu-the-nao-768x432.webp 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/fastText-hoat-dong-nhu-the-nao-750x422.webp 750w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-26486\" class=\"wp-caption-text\">fastText ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Hierarchical-Softmax-va-Negative-Sampling-trong-fastText\"><\/span><strong>Hierarchical Softmax v\u00e0 Negative Sampling trong fastText<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 t\u00ednh to\u00e1n trong qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n, fastText t\u00edch h\u1ee3p hai k\u1ef9 thu\u1eadt quan tr\u1ecdng: <strong>Hierarchical Softmax v\u00e0 Negative Sampling<\/strong>. Hierarchical Softmax t\u1ed5 ch\u1ee9c l\u1edbp \u0111\u1ea7u ra theo c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p, gi\u1ea3m thi\u1ec3u vi\u1ec7c t\u00ednh to\u00e1n c\u00e1c x\u00e1c su\u1ea5t \u0111\u1ea7u ra.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, Negative Sampling n\u00e2ng cao hi\u1ec7u qu\u1ea3 b\u1eb1ng c\u00e1ch hu\u1ea5n luy\u1ec7n m\u00f4 h\u00ecnh \u0111\u1ec3<strong> ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c t\u1eeb \u0111\u00fang v\u00e0 t\u1eeb nhi\u1ec5u<\/strong>. Nh\u1eefng k\u1ef9 thu\u1eadt n\u00e0y gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n, l\u00e0m cho n\u00f3 nhanh h\u01a1n v\u00e0 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng h\u01a1n, ngay c\u1ea3 v\u1edbi c\u00e1c t\u1eeb v\u1ef1ng l\u1edbn.<\/p>\n<p>Hi\u1ec3u c\u00e1ch th\u01b0 vi\u1ec7n fastText s\u1eed d\u1ee5ng th\u00f4ng tin subword, k\u1ebft h\u1ee3p v\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng m\u00f4 h\u00ecnh Skip-gram v\u00e0 CBOW c\u00f9ng c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 Hierarchical Softmax v\u00e0 Negative Sampling, gi\u00fap ta nh\u1eadn th\u1ee9c r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch th\u1ee9c t\u1ea1o ra word embeddings hi\u1ec7u qu\u1ea3 v\u00e0 ch\u00ednh x\u00e1c.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tinh-nang-noi-bat-cua-thu-vien-fastText\"><\/span><strong>T\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a th\u01b0 vi\u1ec7n fastText\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a th\u01b0 vi\u1ec7n fastText:<\/p>\n<ul>\n<li><strong>Embedding t\u1eeb ng\u1eef<\/strong>: fastText h\u1ecdc c\u00e1ch bi\u1ec3u di\u1ec5n t\u1eeb ng\u1eef (embedding) b\u1eb1ng c\u00e1ch ph\u00e2n t\u00e1ch c\u00e1c t\u1eeb th\u00e0nh c\u00e1c n-gram k\u00fd t\u1ef1. \u0110i\u1ec1u n\u00e0y gi\u00fap n\u00f3 n\u1eafm b\u1eaft nhi\u1ec1u th\u00f4ng tin h\u01a1n v\u1ec1 h\u00ecnh th\u00e1i h\u1ecdc c\u1ee7a c\u00e1c t\u1eeb, l\u00e0m cho n\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c t\u1eeb hi\u1ebfm ho\u1eb7c ch\u01b0a t\u1eebng g\u1eb7p.<\/li>\n<li><strong>Ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n<\/strong>: fastText h\u1ed7 tr\u1ee3 h\u1ecdc c\u00f3 gi\u00e1m s\u00e1t cho ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n. Ch\u00fang ta c\u00f3 th\u1ec3 hu\u1ea5n luy\u1ec7n c\u00e1c m\u00f4 h\u00ecnh cho c\u00e1c nhi\u1ec7m v\u1ee5 nh\u01b0 ph\u00e2n t\u00edch c\u1ea3m x\u00fac, ph\u00e2n lo\u1ea1i ch\u1ee7 \u0111\u1ec1 v\u00e0 ph\u00e1t hi\u1ec7n th\u01b0 r\u00e1c.<\/li>\n<li><strong>M\u00f4 h\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n s\u1eb5n<\/strong>: fastText cung c\u1ea5p c\u00e1c vector t\u1eeb \u0111\u00e3 \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n s\u1eb5n cho h\u01a1n 150 ng\u00f4n ng\u1eef, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c nhi\u1ec7m v\u1ee5 NLP kh\u00e1c nhau m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i hu\u1ea5n luy\u1ec7n l\u1ea1i m\u00f4 h\u00ecnh t\u1eeb \u0111\u1ea7u.<\/li>\n<li><strong>X\u1eed l\u00fd t\u1eeb ngo\u00e0i t\u1eeb v\u1ef1ng (OOV)<\/strong>: V\u1edbi ph\u01b0\u01a1ng ph\u00e1p subword, th\u01b0 vi\u1ec7n fastText c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c t\u1eeb kh\u00f4ng c\u00f3 trong d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n b\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng c\u00e1c n-gram k\u00fd t\u1ef1 c\u1ee7a ch\u00fang.<\/li>\n<\/ul>\n<p>Nh\u1eefng t\u00ednh n\u0103ng n\u00e0y gi\u00fap fastText tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd cho c\u00e1c t\u00e1c v\u1ee5 x\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean nh\u01b0 h\u1ecdc embedding t\u1eeb ng\u1eef, ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n v\u00e0 x\u1eed l\u00fd nhi\u1ec1u ng\u00f4n ng\u1eef v\u00e0 b\u1ed9 d\u1eef li\u1ec7u kh\u00e1c nhau.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Su-khac-biet-giua-fastText-va-Word2Vec\"><\/span><strong>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa fastText v\u00e0 Word2Vec<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>fastText v\u00e0 Word2Vec \u0111\u1ec1u l\u00e0 hai thu\u1eadt to\u00e1n ph\u1ed5 bi\u1ebfn \u0111\u1ec3 t\u1ea1o ra word embeddings, nh\u01b0ng ch\u00fang c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t v\u1ec1 c\u00e1ch ti\u1ebfp c\u1eadn v\u00e0 kh\u1ea3 n\u0103ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa fastText v\u00e0 Word2Vec:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Xu-ly-cac-tu-ngoai-tu-vung-OOV\"><\/span><strong>X\u1eed l\u00fd c\u00e1c t\u1eeb ngo\u00e0i t\u1eeb v\u1ef1ng (OOV)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Word2Vec<\/strong>: Word2Vec ho\u1ea1t \u0111\u1ed9ng \u1edf c\u1ea5p \u0111\u1ed9 t\u1eeb, t\u1ea1o embeddings cho t\u1eebng t\u1eeb ri\u00eang l\u1ebb. N\u00f3 g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi c\u00e1c t\u1eeb ngo\u00e0i t\u1eeb v\u1ef1ng v\u00ec kh\u00f4ng th\u1ec3 bi\u1ec3u di\u1ec5n nh\u1eefng t\u1eeb ch\u01b0a t\u1eebng th\u1ea5y trong qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n.<\/li>\n<li><strong>fastText<\/strong>: Ng\u01b0\u1ee3c l\u1ea1i, th\u01b0 vi\u1ec7n fastText gi\u1edbi thi\u1ec7u embedding subword b\u1eb1ng c\u00e1ch coi c\u00e1c t\u1eeb \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb c\u00e1c n-gram k\u00fd t\u1ef1. \u0110i\u1ec1u n\u00e0y gi\u00fap fastText x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 c\u00e1c t\u1eeb ngo\u00e0i t\u1eeb v\u1ef1ng b\u1eb1ng c\u00e1ch chia nh\u1ecf c\u00e1c t\u1eeb th\u00e0nh c\u00e1c \u0111\u01a1n v\u1ecb subword v\u00e0 t\u1ea1o embeddings cho c\u00e1c \u0111\u01a1n v\u1ecb n\u00e0y, ngay c\u1ea3 v\u1edbi c\u00e1c t\u1eeb ch\u01b0a g\u1eb7p. Kh\u1ea3 n\u0103ng n\u00e0y gi\u00fap fastText m\u1ea1nh m\u1ebd h\u01a1n khi x\u1eed l\u00fd c\u00e1c bi\u1ec3u th\u1ee9c hi\u1ebfm ho\u1eb7c ph\u1ee9c t\u1ea1p v\u1ec1 h\u00ecnh th\u00e1i h\u1ecdc.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<figure id=\"attachment_26488\" aria-describedby=\"caption-attachment-26488\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/Su-khac-biet-giua-fastText-va-Word2Vec.png\" alt=\"S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa fastText v\u00e0 Word2Vec\" width=\"800\" height=\"390\" class=\"size-full wp-image-26488\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/Su-khac-biet-giua-fastText-va-Word2Vec.png 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/Su-khac-biet-giua-fastText-va-Word2Vec-300x146.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/Su-khac-biet-giua-fastText-va-Word2Vec-768x374.png 768w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/03\/Su-khac-biet-giua-fastText-va-Word2Vec-750x366.png 750w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-26488\" class=\"wp-caption-text\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa fastText v\u00e0 Word2Vec<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Co-che-hoat-dong\"><\/span><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Word2Vec<\/strong>: M\u00f4 h\u00ecnh &#8220;Word2Vec&#8221; (GloVe) t\u00ednh to\u00e1n c\u00e1c vector bi\u1ec3u di\u1ec5n t\u1eeb th\u00f4ng qua vi\u1ec7c s\u1eed d\u1ee5ng x\u00e1c su\u1ea5t \u0111\u1ed3ng xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c t\u1eeb tr\u00ean to\u00e0n b\u1ed9 kho d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n.<\/li>\n<li><strong>FastText<\/strong>: M\u00f4 h\u00ecnh &#8220;FastText&#8221; x\u00e2y d\u1ef1ng c\u00e1c vector bi\u1ec3u di\u1ec5n cho t\u1eeb d\u1ef1a tr\u00ean vi\u1ec7c ph\u00e2n t\u00edch c\u1ea5u tr\u00fac th\u00e0nh ph\u1ea7n b\u00ean trong c\u1ee7a t\u1eeb \u0111\u00f3 (v\u00ed d\u1ee5: c\u00e1c c\u1ee5m k\u00fd t\u1ef1 con &#8211; character n-grams).<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Bieu-dien-tu-ngu\"><\/span><strong>Bi\u1ec3u di\u1ec5n t\u1eeb ng\u1eef<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Word2Vec<\/strong>: Word2Vec t\u1ea1o embeddings cho t\u1eeb d\u1ef1a tr\u00ean c\u00e1c t\u1eeb m\u00e0 kh\u00f4ng xem x\u00e9t c\u1ea5u tr\u00fac b\u00ean trong hay th\u00f4ng tin h\u00ecnh th\u00e1i h\u1ecdc.<\/li>\n<li><strong>fastText<\/strong>: fastText n\u1eafm b\u1eaft th\u00f4ng tin subword, gi\u00fap hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a t\u1eeb d\u1ef1a tr\u00ean c\u00e1c n-gram k\u00fd t\u1ef1 c\u1ea5u th\u00e0nh ch\u00fang. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p fastText bi\u1ec3u di\u1ec5n c\u00e1c t\u1eeb b\u1eb1ng c\u00e1ch xem x\u00e9t c\u1ea5u tr\u00fac h\u00ecnh th\u00e1i c\u1ee7a ch\u00fang, t\u1ea1o ra m\u1ed9t bi\u1ec3u di\u1ec5n phong ph\u00fa h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi c\u00e1c ng\u00f4n ng\u1eef c\u00f3 h\u00ecnh th\u00e1i h\u1ecdc ph\u1ee9c t\u1ea1p ho\u1eb7c c\u00e1c l\u0129nh v\u1ef1c c\u00f3 t\u1eeb v\u1ef1ng chuy\u00ean ng\u00e0nh.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Hieu-qua-huan-luyen\"><\/span><strong>Hi\u1ec7u qu\u1ea3 hu\u1ea5n luy\u1ec7n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Word2Vec<\/strong>: Qu\u00e1 tr\u00ecnh hu\u1ea5n luy\u1ec7n trong Word2Vec nhanh h\u01a1n so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u0169 nh\u01b0ng c\u00f3 th\u1ec3 ch\u1eadm h\u01a1n so v\u1edbi fastText do c\u00e1ch ti\u1ebfp c\u1eadn \u1edf c\u1ea5p \u0111\u1ed9 t\u1eeb.<\/li>\n<li><strong>fastText<\/strong>: fastText n\u1ed5i b\u1eadt v\u1edbi t\u1ed1c \u0111\u1ed9 v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u01b0\u1ee3t tr\u1ed9i, \u0111\u1eb7c bi\u1ec7t khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn, v\u00ec n\u00f3 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 \u1edf c\u1ea5p \u0111\u1ed9 subword.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Ung-dung\"><\/span><strong>\u1ee8ng d\u1ee5ng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Word2Vec<\/strong>: Embedding c\u1ea5p \u0111\u1ed9 t\u1eeb c\u1ee7a Word2Vec r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c t\u00e1c v\u1ee5 nh\u01b0 t\u00ecm t\u1eeb t\u01b0\u01a1ng t\u1ef1, hi\u1ec3u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c t\u1eeb v\u00e0 n\u1eafm b\u1eaft s\u1ef1 t\u01b0\u01a1ng \u0111\u1ed3ng ng\u1eef ngh\u0129a.<\/li>\n<li><strong>fastText<\/strong>: Embedding subword c\u1ee7a th\u01b0 vi\u1ec7n fastText gi\u00fap n\u00f3 linh ho\u1ea1t h\u01a1n trong c\u00e1c t\u00ecnh hu\u1ed1ng li\u00ean quan \u0111\u1ebfn c\u00e1c t\u1eeb ngo\u00e0i t\u1eeb v\u1ef1ng, ph\u00e2n t\u00edch c\u1ea3m x\u00fac, nh\u1eadn di\u1ec7n ng\u00f4n ng\u1eef v\u00e0 c\u00e1c t\u00e1c v\u1ee5 y\u00eau c\u1ea7u hi\u1ec3u s\u00e2u v\u1ec1 h\u00ecnh th\u00e1i h\u1ecdc.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, m\u1eb7c d\u00f9 c\u1ea3 hai thu\u1eadt to\u00e1n \u0111\u1ec1u t\u1ea1o ra word embeddings, nh\u01b0ng vi\u1ec7c fastText k\u1ebft h\u1ee3p th\u00f4ng tin subword gi\u00fap n\u00f3 x\u1eed l\u00fd c\u00e1c t\u1eeb OOV hi\u1ec7u qu\u1ea3 h\u01a1n, l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0a th\u00edch trong c\u00e1c t\u00ecnh hu\u1ed1ng c\u00f3 d\u1eef li\u1ec7u h\u1ea1n ch\u1ebf ho\u1eb7c ng\u00f4n ng\u1eef c\u00f3 c\u1ea5u tr\u00fac t\u1eeb ph\u1ee9c t\u1ea1p.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ung-dung-thuc-te-cua-fastText\"><\/span><strong>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a fastText<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Phan-loai-va-phan-loai-van-ban\"><\/span><strong>Ph\u00e2n lo\u1ea1i v\u00e0 ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>fastText xu\u1ea5t s\u1eafc trong c\u00e1c nhi\u1ec7m v\u1ee5 ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n, gi\u00fap ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0o c\u00e1c l\u1edbp ho\u1eb7c danh m\u1ee5c \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh s\u1eb5n.<\/p>\n<p>Kh\u1ea3 n\u0103ng <strong>n\u1eafm b\u1eaft th\u00f4ng tin subword<\/strong> c\u1ee7a n\u00f3 gi\u00fap hi\u1ec3u s\u00e2u h\u01a1n, cho ph\u00e9p ph\u00e2n lo\u1ea1i ch\u00ednh x\u00e1c ngay c\u1ea3 khi c\u00f3 \u00edt d\u1eef li\u1ec7u hu\u1ea5n luy\u1ec7n. Kh\u1ea3 n\u0103ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong vi\u1ec7c l\u1ecdc th\u01b0 r\u00e1c, ph\u00e2n lo\u1ea1i ch\u1ee7 \u0111\u1ec1 v\u00e0 g\u1eafn th\u1ebb n\u1ed9i dung trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nhan-dien-ngon-ngu-va-dich-thuat\"><\/span><strong>Nh\u1eadn di\u1ec7n ng\u00f4n ng\u1eef v\u00e0 d\u1ecbch thu\u1eadt<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c embedding \u1edf c\u1ea5p \u0111\u1ed9 subword trong th\u01b0 vi\u1ec7n fastText gi\u00fap n\u00f3 <strong>nh\u1eadn di\u1ec7n v\u00e0 l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c ng\u00f4n ng\u1eef<\/strong> ngay c\u1ea3 khi ch\u1ec9 c\u00f3 c\u00e1c \u0111o\u1ea1n v\u0103n b\u1ea3n ho\u1eb7c m\u1eabu d\u1eef li\u1ec7u h\u1ea1n ch\u1ebf. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch trong c\u00e1c nhi\u1ec7m v\u1ee5 nh\u1eadn di\u1ec7n ng\u00f4n ng\u1eef, h\u1ed7 tr\u1ee3 c\u00e1c \u1ee9ng d\u1ee5ng \u0111a ng\u00f4n ng\u1eef v\u00e0 x\u1eed l\u00fd ng\u00f4n ng\u1eef ri\u00eang bi\u1ec7t.<\/p>\n<p>Th\u00eam v\u00e0o \u0111\u00f3, c\u00e1c embedding c\u1ee7a fastText \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n h\u1ec7 th\u1ed1ng d\u1ecbch m\u00e1y, n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh d\u1ecbch.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Phan-tich-cam-xuc-va-khai-thac-y-kien\"><\/span><strong>Ph\u00e2n t\u00edch c\u1ea3m x\u00fac v\u00e0 khai th\u00e1c \u00fd ki\u1ebfn<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong ph\u00e2n t\u00edch c\u1ea3m x\u00fac, fastText v\u1edbi kh\u1ea3 n\u0103ng n\u1eafm b\u1eaft c\u00e1c s\u1eafc th\u00e1i ng\u1eef ngh\u0129a tinh t\u1ebf gi\u00fap ph\u00e2n lo\u1ea1i c\u1ea3m x\u00fac m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n<p><strong> Kh\u1ea3 n\u0103ng hi\u1ec3u v\u00e0 bi\u1ec3u di\u1ec5n t\u1eeb ng\u1eef d\u1ef1a tr\u00ean c\u00e1c \u0111\u01a1n v\u1ecb subword<\/strong> gi\u00fap hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1c bi\u1ec3u th\u1ee9c mang c\u1ea3m x\u00fac, g\u00f3p ph\u1ea7n v\u00e0o vi\u1ec7c khai th\u00e1c \u00fd ki\u1ebfn tinh t\u1ebf h\u01a1n trong ph\u00e2n t\u00edch m\u1ea1ng x\u00e3 h\u1ed9i, \u0111\u00e1nh gi\u00e1 s\u1ea3n ph\u1ea9m v\u00e0 ph\u1ea3n h\u1ed3i t\u1eeb kh\u00e1ch h\u00e0ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Nhan-dien-thuc-the-va-gan-the\"><\/span><strong>Nh\u1eadn di\u1ec7n th\u1ef1c th\u1ec3 v\u00e0 g\u1eafn th\u1ebb<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Nh\u1eadn di\u1ec7n th\u1ef1c th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c x\u00e1c \u0111\u1ecbnh v\u00e0 ph\u00e2n lo\u1ea1i c\u00e1c th\u1ef1c th\u1ec3 trong v\u0103n b\u1ea3n, nh\u01b0 t\u00ean ng\u01b0\u1eddi, t\u1ed5 ch\u1ee9c, \u0111\u1ecba \u0111i\u1ec3m, v\u00e0 h\u01a1n th\u1ebf n\u1eefa. C\u00e1c embedding subword c\u1ee7a fastText gi\u00fap <strong>x\u1eed l\u00fd t\u1ed1t h\u01a1n c\u00e1c th\u1ef1c th\u1ec3 ch\u01b0a g\u1eb7p ho\u1eb7c hi\u1ebfm g\u1eb7p<\/strong>, <strong>n\u00e2ng cao \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng<\/strong> nh\u1eadn di\u1ec7n th\u1ef1c th\u1ec3. Kh\u1ea3 n\u0103ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong vi\u1ec7c tr\u00edch xu\u1ea5t th\u00f4ng tin, c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm v\u00e0 ph\u00e2n t\u00edch n\u1ed9i dung.<\/p>\n<p>T\u00ednh linh ho\u1ea1t c\u1ee7a fastText trong c\u00e1c \u1ee9ng d\u1ee5ng n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb <strong>kh\u1ea3 n\u0103ng x\u1eed l\u00fd th\u00f4ng tin subword hi\u1ec7u qu\u1ea3<\/strong>, gi\u00fap hi\u1ec3u s\u00e2u s\u1eafc c\u00e1c s\u1eafc th\u00e1i ng\u00f4n ng\u1eef. Kh\u1ea3 n\u0103ng c\u1ee7a fastText l\u00e0m n\u1ed5i b\u1eadt t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong c\u00e1c \u1ee9ng d\u1ee5ng NLP \u0111a d\u1ea1ng, g\u00f3p ph\u1ea7n v\u00e0o vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u v\u0103n b\u1ea3n ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p>fastText l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd trong l\u0129nh v\u1ef1c NLP, v\u1edbi kh\u1ea3 n\u0103ng x\u1eed l\u00fd c\u00e1c t\u1eeb v\u1ef1ng ngo\u00e0i t\u1eeb \u0111i\u1ec3n, ph\u00e2n lo\u1ea1i v\u0103n b\u1ea3n v\u00e0 ph\u00e2n t\u00edch c\u1ea3m x\u00fac m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa c\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 n-gram k\u00fd t\u1ef1 v\u00e0 m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y gi\u00fap fastText v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c t\u1eeb hi\u1ebfm v\u00e0 c\u00e1c t\u00e1c v\u1ee5 ng\u1eef ngh\u0129a ph\u1ee9c t\u1ea1p.<\/p>\n<p>D\u00f9 b\u1ea1n \u0111ang l\u00e0m vi\u1ec7c v\u1edbi d\u1eef li\u1ec7u l\u1edbn hay c\u00e1c ng\u00f4n ng\u1eef ph\u1ee9c t\u1ea1p, fastText s\u1ebd l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong b\u1ed9 c\u00f4ng c\u1ee5 NLP c\u1ee7a b\u1ea1n.<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm gi\u1ea3i ph\u00e1p l\u01b0u tr\u1eef hi\u1ec7u qu\u1ea3 cho c\u00e1c \u1ee9ng d\u1ee5ng NLP nh\u01b0 fastText, <a href=\"https:\/\/interdata.vn\/thue-vps\/\">thu\u00ea VPS ch\u1ea5t l\u01b0\u1ee3ng gi\u00e1 r\u1ebb<\/a> v\u00e0 <a href=\"https:\/\/interdata.vn\/cloud-server\/\">Cloud Server gi\u00e1 r\u1ebb t\u1ed1c \u0111\u1ed9 cao<\/a> t\u1ea1i InterData l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p. V\u1edbi ph\u1ea7n c\u1ee9ng th\u1ebf h\u1ec7 m\u1edbi nh\u01b0 <a href=\"https:\/\/interdata.vn\/blog\/cpu-amd-epyc\/\">CPU AMD EPYC<\/a> v\u00e0 Intel Xeon Platinum, k\u1ebft h\u1ee3p SSD NVMe U.2, b\u1ea1n s\u1ebd tr\u1ea3i nghi\u1ec7m hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i, \u0111\u1ea3m b\u1ea3o c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng m\u01b0\u1ee3t m\u00e0 v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p>\n<p>D\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/blog\/vps-la-gi\/\">VPS<\/a> v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/cloud-server-may-chu-dam-may\/\">Cloud Server<\/a> s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng x\u1eed l\u00fd c\u00e1c b\u1ed9 d\u1eef li\u1ec7u l\u1edbn v\u00e0 c\u00e1c m\u00f4 h\u00ecnh NLP ph\u1ee9c t\u1ea1p. C\u1ea5u h\u00ecnh t\u1ed1i \u01b0u, dung l\u01b0\u1ee3ng linh ho\u1ea1t v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/bang-thong-la-gi\/\">b\u0103ng th\u00f4ng<\/a> cao s\u1ebd gi\u00fap b\u1ea1n t\u1ed1i \u0111a h\u00f3a hi\u1ec7u qu\u1ea3 c\u00f4ng vi\u1ec7c.<\/p>\n<p>H\u00e3y li\u00ean h\u1ec7 v\u1edbi ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 v\u00e0 t\u00ecm ra gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>INTERDATA<\/strong><\/p>\n<ul>\n<li><strong>Website:<\/strong>\u00a0Interdata.vn<\/li>\n<li><strong>Hotline:<\/strong>\u00a01900-636822<\/li>\n<li><strong>Email:<\/strong>\u00a0Info@interdata.vn<\/li>\n<li><strong>VP\u0110D:<\/strong>\u00a0240 Nguy\u1ec5n \u0110\u00ecnh Ch\u00ednh, P.11. Q. Ph\u00fa Nhu\u1eadn, TP. Ho\u0302\u0300 Ch\u00ed Minh<\/li>\n<li><strong>VPGD:<\/strong>\u00a0S\u1ed1 211 \u0110\u01b0\u1eddng s\u1ed1 5, K\u0110T Lakeview City, P. An Ph\u00fa, TP. Th\u1ee7 \u0110\u1ee9c, TP. H\u1ed3 Ch\u00ed Minh<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>fastText, m\u1ed9t s\u1ea3n ph\u1ea9m c\u1ee7a Facebook AI Research (FAIR), \u0111\u00e3 mang \u0111\u1ebfn m\u1ed9t b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong l\u0129nh v\u1ef1c x\u1eed l\u00fd ng\u00f4n ng\u1eef t\u1ef1 nhi\u00ean (NLP). V\u1edbi kh\u1ea3 n\u0103ng x\u1eed l\u00fd th\u00f4ng tin subword v\u00e0 hi\u1ec7u qu\u1ea3 v\u01b0\u1ee3t tr\u1ed9i trong vi\u1ec7c h\u1ecdc t\u1eeb v\u1ef1ng, fastText \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong<\/p>\n","protected":false},"author":11,"featured_media":26495,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[],"class_list":["post-26482","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/26482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=26482"}],"version-history":[{"count":3,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/26482\/revisions"}],"predecessor-version":[{"id":26496,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/26482\/revisions\/26496"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/26495"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=26482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=26482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=26482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}