2024-2025第一学期_软工23级(普).zip
资源内容介绍
2024-2025第一学期_软工23级(普).zip <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89991358/7/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89991358/bg1.jpg"/><div class="c x0 y1 w2 h0"><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">第<span class="ff2">2</span>章<span class="ff2"> </span>关系</div><div class="t m0 x2 h3 y3 ff3 fs1 fc1 sc0 ls0 ws0">•<span class="ff2">xzeng0<span class="_ _0"></span>712@swu.edu.cn</span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div><div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89991358/bg2.jpg"><div class="c x0 y1 w2 h0"><div class="t m1 x3 h4 y4 ff1 fs2 fc2 sc0 ls0 ws0">第<span class="ff4">1</span>页</div><div class="t m0 x4 h5 y5 ff5 fs3 fc3 sc1 ls1 ws0">离散对象虽然离散<span class="ff6">, </span><span class="ls2">但没有<span class="ls0">“</span>关系”是不</span></div><div class="t m0 x5 h6 y6 ff5 fs4 fc3 sc1 ls3 ws0">行的<span class="ff6 ls4">. </span></div><div class="t m0 x4 h5 y7 ff5 fs3 fc3 sc1 ls1 ws0">在信息科学中<span class="ff6 ls2">, <span class="ff5">数据与数据之间总存在一</span></span></div><div class="t m0 x5 h6 y8 ff5 fs4 fc3 sc1 ls3 ws0">定的关系<span class="ff6 ls4">, </span><span class="ls2">主要是</span><span class="fc4 sc2">关联关系</span><span class="ff6 ls0">.</span></div><div class="t m0 x4 h5 y9 ff5 fs3 fc3 sc1 ls1 ws0">科学研究的主要任务就是发现事物之间的</div><div class="t m0 x5 h6 ya ff5 fs4 fc3 sc1 ls3 ws0">内在关系<span class="ff6 ls4">, </span><span class="ls2">特别是</span><span class="fc4 sc2">因果关系</span><span class="ff6 ls4">. </span></div><div class="t m0 x4 h5 yb ff5 fs3 fc3 sc1 ls1 ws0">如何建立关系的数学模型<span class="ff6 ls0">?</span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div><div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89991358/bg3.jpg"><div class="c x0 y1 w2 h0"><div class="t m0 x5 h7 yc ff7 fs3 fc3 sc0 ls0 ws0">•<span class="_ _1"> </span><span class="ff5 sc1 ls1">关系内容对今后学习<span class="fc4 sc2 ls2">模态逻辑、</span><span class="ls2">数据结构</span></span></div><div class="t m0 x5 h8 yd ff5 fs4 fc3 sc1 ls3 ws0">以及数据库等很多课程都是很重要的<span class="ff2 sc0 ls0">.</span></div><div class="t m1 x3 h4 y4 ff1 fs2 fc2 sc0 ls0 ws0">第<span class="ff4">2</span>页</div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div><div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89991358/bg4.jpg"><div class="c x0 y1 w2 h0"><div class="t m1 x3 h4 y4 ff1 fs2 fc2 sc0 ls0 ws0">第<span class="ff4">3</span>页</div><div class="t m0 x6 h8 ye ff2 fs4 fc1 sc0 ls5 ws0">2.1 <span class="ff1 ls6">关系的概念</span></div><div class="t m0 x7 h9 yf ff8 fs1 fc1 sc0 ls0 ws0">n<span class="ff9 sc3">元关系的定义</span></div><div class="t m0 x8 h3 y10 ff2 fs1 fc5 sc0 ls0 ws0">1</div><div class="t m0 x7 h3 y11 ff2 fs1 fc1 sc0 ls0 ws0">2<span class="ff1">元关系的有关概念</span></div><div class="t m0 x9 h3 y12 ff2 fs1 fc5 sc0 ls0 ws0">2</div><div class="t m0 x7 ha y13 ff1 fs1 fc1 sc0 ls0 ws0">关系的定义域<span class="_ _2"></span>和值域</div><div class="t m0 x9 h3 y14 ff2 fs1 fc5 sc0 ls0 ws0">3</div><div class="t m0 xa hb y15 ff1 fs5 fc1 sc0 ls0 ws0">关系的表示</div><div class="t m0 xb hc y16 ff2 fs6 fc5 sc0 ls0 ws0">4</div><div class="t m0 xc ha y17 ff1 fs1 fc1 sc0 ls0 ws0">函数的关系定<span class="_ _2"></span>义</div><div class="t m0 xd hc y18 ff2 fs6 fc5 sc0 ls0 ws0">5</div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div><div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89991358/bg5.jpg"><div class="c x0 y1 w2 h0"><div class="t m1 x3 h4 y4 ff1 fs2 fc2 sc0 ls0 ws0">第<span class="ff4">4</span>页</div><div class="t m0 x4 hd y19 ff2 fs5 fc3 sc0 ls0 ws0">2.1.1 <span class="ff8 fc1">n<span class="ff5 sc3">元关系的<span class="_ _0"></span>定义</span></span></div><div class="t m0 x4 h3 y1a ff5 fs1 fc3 sc1 ls0 ws0">日常生<span class="_ _0"></span>活中存在<span class="_ _0"></span>各种各<span class="_ _0"></span>样的<span class="_ _0"></span>关系<span class="_ _0"></span><span class="ff2 sc0 ls7">, <span class="_ _2"></span><span class="ff5 sc1 ls2">数学中也已经</span></span></div><div class="t m0 x5 h3 y1b ff5 fs1 fc3 sc1 ls0 ws0">学习<span class="_ _0"></span>过很<span class="_ _0"></span>多关系<span class="_ _0"></span><span class="ff2 sc0 ls8">. </span>如何建立<span class="_ _0"></span>关系<span class="_ _0"></span>的数学模型<span class="_ _3"></span><span class="ff2 sc0">?</span></div><div class="t m0 x4 he y1c ff5 fs1 fc6 sc4 ls1 ws0">引例</div><div class="t m0 x4 h3 y1d ff8 fs1 fc3 sc0 ls0 ws0">A<span class="_"> </span><span class="ff2">= {<span class="ff5 sc1 ls9">张三</span><span class="ls8">, <span class="_ _2"></span><span class="ff5 sc1 lsa">李四<span class="ff2 sc0 ls8">, <span class="_ _4"></span><span class="ff5 sc1 ls9">王五<span class="ff2 sc0 lsb">};</span></span></span></span></span></span></div><div class="t m0 x4 h3 y1e ff8 fs1 fc3 sc0 ls0 ws0">B<span class="_"> </span><span class="ff2">= {<span class="ff5 sc1 ls9">英语</span>, <span class="_ _2"></span>C<span class="ff5 sc1 ls9">语言</span><span class="lsc">, </span><span class="ff5 sc1">离散数<span class="_ _0"></span>学<span class="_ _0"></span></span><span class="lsc">, </span><span class="ff5 sc1">数据结<span class="_ _0"></span>构<span class="_ _0"></span></span><span class="ls8">, <span class="_ _4"></span><span class="ff5 sc1 ls9">算法<span class="ff2 sc0 lsb">};</span></span></span></span></div><div class="t m0 x4 h3 y1f ff8 fs1 fc3 sc0 ls0 ws0">C<span class="_"> </span><span class="ff2">= {<span class="ff5 sc1">优<span class="_ _0"></span></span><span class="ls8">, </span><span class="ff5 sc1">良</span><span class="ls8">, <span class="ff5 sc1 ls9">合格</span>, <span class="_ _4"></span><span class="ff5 sc1 ls9">不合格<span class="ff2 sc0 lsb">}.</span></span></span></span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>