dependent1.gv

digraph G {
    rankdir = "LR";
    fontsize=10;
    fontname="serif";
    node [fontsize=10 fontname="serif" shape=box style=rounded width=0.4 height=0.2];
    edge [arrowsize=0.5];
    concentrate=true;
    nodesep = 0.18;
    ranksep = 0.2;
    newrank = true;
    // splines = ortho

    n25 [label="信息技术讲座"];
    n31 [label="金工实习"];

    n01 [label="微积分\n（一）"];
    n02 [label="微积分\n（二）"];
    n03 [label="线性代数"];
    n04 [label="概率统计"];
    n05 [label="工程数学(复变)"];
    n06 [label="普通物理\n（二）（上）"];
    n07 [label="普通物理\n（二）（下）"];
    
    n26 [label="电子实验基础"];
    n09 [label="计算机基础"];
    n10 [label="C语言\n程序设计"];
    n11 [label="电路分析"];
    n12 [label="模拟电路"];
    n13 [label="数字系统与\n逻辑设计"];
    n14 [label="信号与系统"];
    n15 [label="电磁场与电磁波"];

    n16 [label="计算机通\n信与网络"];
    n17 [label="数字信号处理"];
    n18 [label="高频电子线路"];
    n19 [label="通信原理"];
    n27 [label="信号与电路\n基础实验"];

    n20 [label="微波技术与天线"];
    n21 [label="微机原理与\n接口技术"];

    n23 [label="普通物理实验"];
    n28 [label="课程设计"];
    n29 [label="电子线路实验"];
    n32 [label="通信系统综合实验"];
    n33 [label="毕业实习"];
    n34 [label="毕业设计\n（论文）"];

    subgraph cluster_0 {
        style=filled;
        color=lightgrey;
        node [style=filled,color=white,shape=box];
        "term1" [label="第一学期"];
        "term2" [label="第二学期"];
        "term3" [label="第三学期"];
        "term4" [label="第四学期"];
        "term5" [label="第五学期"];
        "term6" [label="第六学期"];
        "term7" [label="第七学期"];
        "term8" [label="第八学期"];
        term1 -> term2 -> term3 -> term4 -> term5 -> term6 -> term7 -> term8 [style=invis];
    }

    {rank = same; term1; n03; n01; n09; }
    {rank = same; term2; n04; n02; n06; n23; n10; n11; }
    {rank = same; term3; n07; n26; n05; n13; n12; n14; }
    {rank = same; term4; n27; n18; n15; n17; }
    {rank = same; term5; n29; n19; n20; n21; n31; n25; }
    {rank = same; term6; n16; n28; }
    {rank = same; term7; n32; n33 }
    {rank = same; term8; n34;}

    n01 -> n02 -> n05; n01 -> n04 -> n19; n01 -> n06 -> n07 -> n15 -> n20 [weight=2];
    n09 -> n10 -> n16 -> n32; n11 -> n12 -> n18 -> n29 [weight=6];
    n11 -> n13 -> n21 -> {n32, n28 } [weight=2];
    {n01, n03} -> n11 -> n14 -> n17 -> n19 -> n32 [weight=2];
    n05 -> n14; n05 -> n15
    n10 -> n21;
    n06 -> n23; n11 -> n26; n14 -> n27;
}