{"id":9104,"date":"2010-07-04T21:11:00","date_gmt":"2010-07-04T21:11:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=9104"},"modified":"2010-07-04T21:11:00","modified_gmt":"2010-07-04T21:11:00","slug":"%ea%b5%ac%ec%9d%98-%ea%b7%b8%eb%a6%bc%ec%9e%90","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=9104","title":{"rendered":"\uad6c\uc758 \uadf8\ub9bc\uc790"},"content":{"rendered":"<div class=\"desc\">\n        \uc8fc\uc5b4\uc9c4 \ubb38\uc81c<br \/>\n        <br \/>\n        3\ucc28\uc6d0 \uacf5\uac04\uc5d0 \uc810\uad11\uc6d0\uacfc \uad6c\uac00 \uc788\ub2e4. \uc810\uad11\uc6d0\uc740 \ubaa8\ub4e0 \ubc29\ud5a5\uc73c\ub85c \ube5b\uc744 \ubc29\uc0ac\ud558\uba70 \uad6c\ub294 \ube5b\uc744 \uac00\ub9b0\ub2e4. \uad6c\uac00 \ube5b\uc744 \uac00\ub9ac\uae30 \ub54c\ubb38\uc5d0 \uc0dd\uae30\ub294 \uadf8\ub9bc\uc790\uac00 x-y\ud3c9\uba74\uc5d0 \ub9cc\ub4dc\ub294 \uc790\ucde8\uc758 \ubc29\uc815\uc2dd\uc744 \uad6c\ud558\uc5ec\ub77c.<\/p>\n<p>        \uc900\ube44\ub2e8\uacc4.<br \/>\n        <br \/>\n        \uad11\uc6d0\uc774 $A$\uc5d0 \uc788\uace0, \uad6c\uc758 \uc911\uc2ec\uc774 $S$\uc5d0 \uc788\ub2e4\uace0 \ud558\uc790. \uadf8\ub9ac\uace0 \uad6c\uc758 \ubc18\uc9c0\ub984\uc740 $d$\ub77c\uace0 \ud558\uc790.<\/p>\n<p>        $k=|A-S|$\ub77c \ud558\uc790.<\/p>\n<p>        1\ub2e8\uacc4<br \/>\n        <br \/>\n        \uad11\uc6d0\uc744 \uaf2d\uc9c0\uc810\uc73c\ub85c \ud558\ub294 \uc6d0\ubfd4 \uc911, \uad6c\uc5d0 \uc811\ud558\ub294 \uac83\uc744 \uad6c\ud55c\ub2e4.<\/p>\n<p>        1-1\ub2e8\uacc4<br \/>\n        <br \/>\n        \uc6d0\ubfd4\uc774 \uad6c\uc5d0 \uc811\ud55c\ub2e4\uace0 \ud558\uba74, \uad6c\uc640 \uc6d0\ubfd4\uc758 \uc811\uc810\uc740 \uc6d0\uc744 \uc774\ub8ec\ub2e4. \uc774\ub54c, \uc774 \uc6d0\uc758 \uc911\uc2ec\uc744 $C$\ub77c\uace0 \ud558\uace0, \uc6d0\uc758 \ubc18\uc9c0\ub984\uc744 $R$\uc774\ub77c\uace0 \ud558\uc790.<\/p>\n<p>        1-1-1\ub2e8\uacc4<br \/>\n        <br \/>\n        \uad6c\uc5d0 \uc811\ud558\ub294 \uc6d0\uc758 \uc911\uc2ec\uc758 \uc704\uce58\ub294 \uac04\ub2e8\ud55c \ube44\ub840\uc2dd\uc744 \ud1b5\ud574\uc11c \uad6c\ud560 \uc218 \uc788\ub2e4. \ub610\ub294 \ud53c\ud0c0\uace0\ub77c\uc2a4\uc758 \uc815\ub9ac\ub97c \uc774\uc6a9\ud574\ub3c4 \uad6c\ud560 \uc218 \uc788\ub2e4. \uc790\uc138\ud55c \uacc4\uc0b0\uc744 \uc0dd\ub7b5\ud55c \ucc44 \uad6c\ud55c\ub2e4\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4.<br \/>\n        <br \/>\n        $C = (S-A)(1-\\frac{d^2}{k})+X$<\/p>\n<p>        1-1-2\ub2e8\uacc4<br \/>\n        <br \/>\n        \uad6c\uc5d0 \uc811\ud558\ub294 \uc6d0\uc758 \ubc18\uc9c0\ub984\uc744 $R$\uc774\ub77c\uace0 \ud558\uba74, \ud53c\ud0c0\uace0\ub77c\uc2a4\uc758 \uc815\ub9ac\ub97c \uc774\uc6a9\ud574\uc11c \uc27d\uac8c \uad6c\ud560 \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        $R = d^2(1-\\frac{1}{k})$<\/p>\n<p>        1-2\ub2e8\uacc4<br \/>\n        <br \/>\n        \uc6d0\ubfd4\uc774 \uad6c\uc5d0 \uc811\ud558\uba74\uc11c \uc0dd\uae30\ub294 \uc6d0\uc758 \ubc29\uc815\uc2dd\uc744 \ucc3e\ub294\ub2e4. \uc6d0 \uc704\uc5d0 \uc788\ub294 \uc810\uc744 $B$\ub77c\uace0 \ud558\uc790. \uadf8\ub7fc, \uc6d0 \uc704\uc5d0 \uc788\ub294 \uc810\uc740 \ub2e4\uc74c\uc758 \ub450 \ubc29\uc815\uc2dd\uc744 \ubaa8\ub450 \ub9cc\uc871\ud574\uc57c \ud55c\ub2e4.<\/p>\n<p>        \ud3c9\uba74\uc758 \ubc29\uc815\uc2dd<br \/>\n        <br \/>\n        $(A-C)\\cdot (B-C) = 0$<\/p>\n<p>        \uc6d0\uc758 \ubc29\uc815\uc2dd<br \/>\n        <br \/>\n        $|B-C|^2 = R^2$<\/p>\n<p>        \uc774 \ubc29\uc815\uc2dd\uc740 \ubbf8\uc9c0\uc218\uac00 3\uac1c\uc778 2\ucc28 \uc5f0\ub9bd \ubc29\uc815\uc2dd\uc774\ub2e4. A, C, R\uc744 \uc54c\uace0 \uc788\uc73c\ubbc0\ub85c B\ub3c4 \uc54c \uc218 \uc788\ub2e4. \ud558\uc9c0\ub9cc &#8220;\uc6d0&#8221;\uc740 1\ucc28\uc6d0 \ub3c4\ud615\uc774\uae30 \ub54c\ubb38\uc5d0, 1\uac1c\uc758 \ub9e4\uac1c\ubcc0\uc218\ub97c \ub0a8\uaca8\ub450\uace0 \ub098\uba38\uc9c0 2\uac1c\ub294 \uadf8 \ub9e4\uac1c\ubcc0\uc218 1\uac1c\ub85c \ud45c\ud604\ud574\uc57c \ud55c\ub2e4. (\uadf8\ub807\uac8c \ud574\uc57c\ub9cc \uc55e\uc73c\ub85c \uadf8\ub9bc\uc790\uac00 \ub9cc\ub4dc\ub294 \uc790\ucde8\uc758 \ubc29\uc815\uc2dd\uc744 \uad6c\ud560 \ub54c \uadf8 \ub9e4\uac1c\ubcc0\uc218\ub97c \uc4f8 \uc218 \uc788\ub2e4.)<\/p>\n<p>        $B=(b_x(\\theta), b_y(\\theta), b_z(\\theta))$<\/p>\n<p>        \ub77c\uace0 \ud558\uc790.<br \/>\n        <br \/>\n        1-2-1\ub2e8\uacc4<br \/>\n        <br \/>\n        $A-C = G$<br \/>\n        <br \/>\n        $B-C = H$<br \/>\n        <br \/>\n        \ub77c\uace0 \ud558\uc790. \uadf8\ub7fc \uc704\uc758 \ubc29\uc815\uc2dd\uc740<br \/>\n        <br \/>\n        $G\\cdot H = 0$<br \/>\n        <br \/>\n        $|H|=R$<br \/>\n        <br \/>\n        \uc73c\ub85c \ubcc0\uc2e0\ud55c\ub2e4. \uc6b0\ub9b0 H\uac00 \ubb54\uc9c0 \uc54c\uc544\ub0b4\uba74 \ub41c\ub2e4.<\/p>\n<p>        \uc774\uac78 \uc27d\uac8c \ud480\ub824\uba74, \uc77c\ub2e8 \uc774\uac8c \uc6d0\uc758 \ubc29\uc815\uc2dd\uc774\ub77c\ub294\uac78 \uc54c\uace0 \uc788\uc73c\ub2c8\uae4c, \uc6d0\uc758 \uadf9\uc88c\ud45c \ud615\uc2dd\uc744 \uc0dd\uac01\ud574 \ubcf4\uc790. \uac00\ub839 $\\alpha$\uc640 $\\beta$\uac00 \ud06c\uae30\uac00 1\uc774\uace0 \uc11c\ub85c \uc218\uc9c1\uc778 \ubca1\ud130\ub77c\uace0 \ud558\uba74<br \/>\n        <br \/>\n        $R(\\alpha\\cos(\\theta) +\\beta \\sin(\\theta)) = H$<br \/>\n        <br \/>\n        \uc774\uc81c $\\alpha$\uc640 $\\beta$\uac00 G\uc5d0 \uc218\uc9c1\uc778 \ubca1\ud130\uc774\uae30\ub9cc \ud558\uba74 \ub41c\ub2e4. \uadf8\ub7f0\ub370, G\uc758 \uc218\uc9c1\uc778 \ubca1\ud130\ub294 \uc27d\uac8c \ucc3e\uc544\ub0bc \uc218 \uc788\ub2e4.<\/p>\n<p>        1-2-2\ub2e8\uacc4<br \/>\n        <br \/>\n        \ub2e4\uc74c\uc758 \ubcf4\uc870\uc815\ub9ac\ub97c \uc124\uba85\ud558\uace0 \ub118\uc5b4\uac04\ub2e4.<br \/>\n        <br \/>\n        K\uc640 L\uc774 \uadf8\ub0e5 \uc5b4\ub5a4 \ub450 \ubca1\ud130\ub77c\uace0 \ud558\uc790. \ub2e8, \uc774\ub54c K\ub294 $|K|=1$\uc744 \ub9cc\uc871\ud55c\ub2e4. \uadf8\ub7fc L\ub85c\ubd80\ud130 \ud56d\uc0c1 K\uc5d0 \uc218\uc9c1\uc774\uba74\uc11c \uc11c\ub85c \uc9c1\uad50\ud558\ub294 \ub450 \ubca1\ud130 M\uacfc N\uc744 \ucc3e\uc544\ub0bc \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        \ubca1\ud130 M\uc744 \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ud558\uc790.<br \/>\n        <br \/>\n        $M = L &#8211; (K \\cdot L)$<br \/>\n        <br \/>\n        \ubca1\ud130 M\uc774 K\uc640 \uc9c1\uad50\ud558\ub294 \uac83\uc740 \uc27d\uac8c \uc54c \uc218 \uc788\ub2e4. (\ub0b4\uc801 \ud574\ubcf4\uba74 \ub41c\ub2e4.)<br \/>\n        <br \/>\n        \uc774\uc81c K\uc640 M\uc5d0 \ub3d9\uc2dc\uc5d0 \uc9c1\uad50\ud558\ub294 \ubca1\ud130\ub3c4 \ub2e4\uc74c\uacfc \uac19\uc774 \uc54c \uc218 \uc788\ub2e4.<br \/>\n        <br \/>\n        $N = K\\times M$<br \/>\n        <br \/>\n        \uc774\ub54c $\\times$\ub294 \ud1b5\uc0c1\uc758 3\ucc28\uc6d0 Cross product\ub97c \uc758\ubbf8\ud55c\ub2e4.<\/p>\n<p>        \uc5ec\uae30\uc11c \uc5bb\uc740 M\uacfc N\uc744 \ud06c\uae30\ub97c 1\ub85c \ub9cc\ub4e4\uc5b4 \uc8fc\uba74 1-2-1\ub2e8\uacc4\uc758 $\\alpha$\uc640 $\\beta$\ub97c \uc54c\uc544\ub0bc \uc218 \uc788\ub2e4.<\/p>\n<p>        1-3\ub2e8\uacc4<br \/>\n        <br \/>\n        \uad11\uc6d0\uacfc \uc6d0 \uc704\uc5d0 \uc788\ub294 \uc810\uc744 \uc9c0\ub098\ub294 \uc9c1\uc120\uc758 \ubc29\uc815\uc2dd\uc744 \uad6c\ud55c\ub2e4. \uacf5\uac04\uc5d0\uc11c \ub450 \uc810 A\uc640 B\ub97c \uc9c0\ub098\ub294 \uc9c1\uc120\uc758 \ubc29\uc815\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<br \/>\n        <br \/>\n        $\\frac{x-a_x}{b_x &#8211; a_x} = \\frac{y-a_y}{b_y-a_y} = \\frac{z-a_z}{b_z &#8211; a_z}$<\/p>\n<p>        \uc774\ub54c, B\uc758 \uac01 \uc131\ubd84\uc740 \ub9e4\uac1c\ubcc0\uc218 $\\theta$\uc5d0 \ub530\ub77c\uc11c \ubc14\ub00c\ubbc0\ub85c \uc2e4\uc9c8\uc801\uc73c\ub85c \uc704\uc758 \uc9c1\uc120\uc758 \ubc29\uc815\uc2dd\uc740 \uc6d0\ubfd4\uc758 \ubc29\uc815\uc2dd\uc774\ub2e4!<\/p>\n<p>        2\ub2e8\uacc4<br \/>\n        <br \/>\n        \uadf8\ub9bc\uc790\uac00 \ub9cc\ub4dc\ub294 \uc790\ucde8\uc758 \ubc29\uc815\uc2dd\uc744 \uc54c\uc544\ub0b8\ub2e4.<\/p>\n<p>        2-1\ub2e8\uacc4<br \/>\n        <br \/>\n        1\ub2e8\uacc4\uc5d0\uc11c \uc54c\uc544\ub0b8 \uc6d0\ubfd4\uc758 \ubc29\uc815\uc2dd\uc5d0 z=0\uc744 \ub300\uc785\ud574\uc11c \uadf8 \uc870\uac74\uc744 \ub9cc\uc871\ud558\ub294 $(x(\\theta), y(\\theta))$\ub97c \ucc3e\uc544\ub0b8\ub2e4.<\/p>\n<p>        2-2\ub2e8\uacc4<br \/>\n        <br \/>\n        \ud544\uc694\ud558\ub2e4\uba74 \uc704\uc5d0\uc11c \uc54c\uc544\ub0b8 \ub9e4\uac1c\ubcc0\uc218 \ubc29\uc815\uc2dd\uc744 $y=f(x)$ \uaf34\ub85c \ubc14\uafd4\uc900\ub2e4.<\/p>\n<p>        \uc774 \ubaa8\ub4e0 \uacc4\uc0b0\uc5d0 A, S, d\ub97c \ubb38\uc790\ub85c \ub300\uc785\ud574\uc11c \ud480\uc5b4\ub0bc \uc218\ub3c4 \uc788\ub2e4. \uc5ec\ubc31\uc774 \ubd80\uc871\ud55c\uac74 \uc544\ub2c8\uc9c0\ub9cc \uc77c\ub2e8 \uadf8\ub0e5 \ub454\ub2e4.<\/p>\n<p>        \ucc38\uace0\ub85c, \ubb38\uc790\ub85c \ub300\uc785\ud574\uc11c \uba85\uc2dc\uc801\uc73c\ub85c(Explicitely) \ud480\uace0 \uc2f6\ub2e4\uba74 1-3\ub2e8\uacc4 -> 2-1\ub2e8\uacc4 -> 2-2\ub2e8\uacc4\ub97c \uba3c\uc800 \ud574\uacb0\ud55c \ud6c4, 1-2\ub2e8\uacc4\ubd80\ud130 1-1\ub2e8\uacc4\ub85c \uac70\uafb8\ub85c \uac70\uc2ac\ub7ec \uc62c\ub77c\uac00\ub294 \uac83\uc774 \uc26c\uc6b8 \uac83\uc774\ub2e4.<br \/>\n        <\/p>\n<div style=\"width:100%;margin-top:30px;clear:both;height:30px\">\n<div style=\"width:31px;float:left;\">\n<a href=\"\/toolbar\/popup\/abuseReport\/?entryId=1932\" onclick=\"window.open(this.href, 'tistoryThisBlogPopup', 'width=550, height=510, toolbar=no, menubar=no, status=no, scrollbars=no'); return false;\"><br \/>\n<img data-recalc-dims=\"1\" decoding=\"async\" alt=\"\uc2e0\uace0\" src=\"https:\/\/i0.wp.com\/t1.daumcdn.net\/tistory_admin\/static\/ico\/ico_spam_report.png\" style=\"border:0\"\/><br \/>\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc8fc\uc5b4\uc9c4 \ubb38\uc81c 3\ucc28\uc6d0 \uacf5\uac04\uc5d0 \uc810\uad11\uc6d0\uacfc \uad6c\uac00 \uc788\ub2e4. \uc810\uad11\uc6d0\uc740 \ubaa8\ub4e0 \ubc29\ud5a5\uc73c\ub85c \ube5b\uc744 \ubc29\uc0ac\ud558\uba70 \uad6c\ub294 \ube5b\uc744 \uac00\ub9b0\ub2e4. \uad6c\uac00 \ube5b\uc744 \uac00\ub9ac\uae30 \ub54c\ubb38\uc5d0 \uc0dd\uae30\ub294 \uadf8\ub9bc\uc790\uac00 x-y\ud3c9\uba74\uc5d0 \ub9cc\ub4dc\ub294 \uc790\ucde8\uc758 \ubc29\uc815\uc2dd\uc744 \uad6c\ud558\uc5ec\ub77c. \uc900\ube44\ub2e8\uacc4. \uad11\uc6d0\uc774 $A$\uc5d0 \uc788\uace0, \uad6c\uc758 \uc911\uc2ec\uc774 $S$\uc5d0 \uc788\ub2e4\uace0 \ud558\uc790. \uadf8\ub9ac\uace0 \uad6c\uc758 \ubc18\uc9c0\ub984\uc740 $d$\ub77c\uace0 \ud558\uc790. $k=|A-S|$\ub77c \ud558\uc790. 1\ub2e8\uacc4 \uad11\uc6d0\uc744 \uaf2d\uc9c0\uc810\uc73c\ub85c \ud558\ub294 \uc6d0\ubfd4 \uc911, \uad6c\uc5d0 \uc811\ud558\ub294 \uac83\uc744 \uad6c\ud55c\ub2e4. 1-1\ub2e8\uacc4 \uc6d0\ubfd4\uc774 \uad6c\uc5d0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-9104","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-2mQ","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/9104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9104"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/9104\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9104"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}