{"id":163841,"date":"2020-10-05T13:10:40","date_gmt":"2020-10-05T05:10:40","guid":{"rendered":"http:\/\/4563.org\/?p=163841"},"modified":"2020-10-05T13:10:40","modified_gmt":"2020-10-05T05:10:40","slug":"%e5%85%b3%e4%ba%8emit-6-006-introduction-to-algorithms-lecture-2-models-of-computation-document-distance%e7%9a%84%e7%96%91%e9%97%ae","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=163841","title":{"rendered":"\u5173\u4e8e\u201cMIT 6.006 Introduction to Algorithms &#8211; Lecture 2: Models of Computation, Document Distance\u201d\u7684\u7591\u95ee"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  \u5173\u4e8e\u201cMIT 6.006 Introduction to Algorithms &#8211; Lecture 2: Models of Computation, Document Distance\u201d\u7684\u7591\u95ee               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span>  <span><i><\/i> 0<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>MIT 6.006 Introduction to Algorithms &#8211; Lecture 2: Models of Computation, Document Distance\u4ecb\u7ecd\u4e86\u4e00\u4e2a\u8ba1\u7b97\u4e24\u4e2a\u6587\u6863\u5dee\u5f02\u7684\u65b9\u6cd5\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/10\/20201006_5f7c0b5099fd7.png\" alt=\"\u5173\u4e8e\u201cMIT 6.006 Introduction to Algorithms - Lecture 2: Models of Computation, Document Distance\u201d\u7684\u7591\u95ee\" \/><\/p>\n<p>\u8981\u8ba1\u7b97\u201ccosine of the angle between two vectors\u201d\uff0c\u4e0d\u662f\u5e94\u8be5\u50cfAngle between two vectors\u6240\u8bf4\u7684\u90a3\u6837\u8ba1\u7b97\u5417\uff1f<\/p>\n<blockquote>\n<p>The cosine of the angle between two vectors is equal to the dot product of this vectors divided by the product of vector magnitude.<\/p>\n<\/blockquote>\n<p>\u4e3a\u4ec0\u4e48\u5728\u8bfe\u7a0b\u6240\u4ecb\u7ecd\u7684\u65b9\u6cd5\u4e2d\uff0c\u201cThe cosine of the angle between two vectors\u201d\u662f\u201cthe dot product of this vectors\u201d\u9664\u4ee5\u201cthe product of the number of words in document\u201d\uff1f<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>0<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>\u5173\u4e8e\u201cMIT 6.006 Intr&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/163841"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=163841"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/163841\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=163841"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=163841"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=163841"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}