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<!DOCTYPE html>
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<title>blog</title>
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<form action="//google.com/search" method="get" accept-charset="UTF-8" class="search-form"><input type="search" name="q" class="search-form-input" placeholder="Search"><button type="submit" class="search-form-submit"></button><input type="hidden" name="sitesearch" value="https://lujiamin.github.io"></form>
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<article id="post-branch" class="article article-type-post" itemscope itemprop="blogPost">
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<a href="/2017/06/21/branch/" class="article-date">
<time datetime="2017-06-21T08:16:48.884Z" itemprop="datePublished">2017-06-21</time>
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<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/21/branch/">branch</a>
</h1>
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<div class="article-entry" itemprop="articleBody">
<h2 id="this-is-from-hexo-branch"><a href="#this-is-from-hexo-branch" class="headerlink" title="this is from hexo branch"></a>this is from hexo branch</h2>
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<article id="post-hello-world" class="article article-type-post" itemscope itemprop="blogPost">
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<a href="/2017/06/21/hello-world/" class="article-date">
<time datetime="2017-06-21T08:15:31.599Z" itemprop="datePublished">2017-06-21</time>
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<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/21/hello-world/">Hello World</a>
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<div class="article-entry" itemprop="articleBody">
<p>Welcome to <a href="https://hexo.io/" target="_blank" rel="external">Hexo</a>! This is your very first post. Check <a href="https://hexo.io/docs/" target="_blank" rel="external">documentation</a> for more info. If you get any problems when using Hexo, you can find the answer in <a href="https://hexo.io/docs/troubleshooting.html" target="_blank" rel="external">troubleshooting</a> or you can ask me on <a href="https://github.com/hexojs/hexo/issues" target="_blank" rel="external">GitHub</a>.</p>
<h2 id="Quick-Start"><a href="#Quick-Start" class="headerlink" title="Quick Start"></a>Quick Start</h2><h3 id="Create-a-new-post"><a href="#Create-a-new-post" class="headerlink" title="Create a new post"></a>Create a new post</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo new <span class="string">"My New Post"</span></div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/writing.html" target="_blank" rel="external">Writing</a></p>
<h3 id="Run-server"><a href="#Run-server" class="headerlink" title="Run server"></a>Run server</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo server</div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/server.html" target="_blank" rel="external">Server</a></p>
<h3 id="Generate-static-files"><a href="#Generate-static-files" class="headerlink" title="Generate static files"></a>Generate static files</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo generate</div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/generating.html" target="_blank" rel="external">Generating</a></p>
<h3 id="Deploy-to-remote-sites"><a href="#Deploy-to-remote-sites" class="headerlink" title="Deploy to remote sites"></a>Deploy to remote sites</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo deploy</div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/deployment.html" target="_blank" rel="external">Deployment</a></p>
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<article id="post-CompilePrinciple" class="article article-type-post" itemscope itemprop="blogPost">
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<a href="/2017/06/19/CompilePrinciple/" class="article-date">
<time datetime="2017-06-19T11:00:00.000Z" itemprop="datePublished">2017-06-19</time>
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<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/19/CompilePrinciple/">the Points of Compile Principle</a>
</h1>
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<div class="article-entry" itemprop="articleBody">
<ul>
<li>语法制导翻译——以语法分析为主导的语义处理，在对源程序进行语法分析的过程中嵌入语义动作</li>
<li>源程序——>中间语言——>目标程序</li>
<li>中间语言的好处<ul>
<li>重新生成目标代码容易</li>
<li>目标代码更容易优化</li>
</ul>
</li>
<li>中间语言的形式<ul>
<li>逆波兰</li>
<li>三元式</li>
<li>四元式
<p class="article-more-link">
<a href="/2017/06/19/CompilePrinciple/#more">Read More</a>
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<article id="post-NetPoints" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2017/06/19/NetPoints/" class="article-date">
<time datetime="2017-06-19T11:00:00.000Z" itemprop="datePublished">2017-06-19</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/19/NetPoints/">the Points of Computer Network</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h2 id="网络层"><a href="#网络层" class="headerlink" title="网络层"></a>网络层</h2><ul>
<li>子网划分中，将主机地址划分为子网号和主机号。子网号和主机号都不能是全0或全1</li>
<li>CIDR中，‘/’后面的N表示可以自由分配32-N位</li>
<li>ICMP封装在IP数据报中，再封装在链路层的帧中</li>
<li>对于已经分片的分组，只对第一个分片产生ICMP差错报文</li>
<li>ARP协议中，ARP请求是广播方式，ARP响应是单播</li>
<li>将IP网络划分成子网，好处是减少广播域的大小</li>
<li>CIDR技术的作用是把小的网络汇聚成大的超网</li>
<li>在IP首部的字段中，与分片和重组无关的字段是总长度
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<a href="/2017/06/19/NetPoints/#more">Read More</a>
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<article id="post-ComputerNetwork" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2017/06/16/ComputerNetwork/" class="article-date">
<time datetime="2017-06-16T11:00:00.000Z" itemprop="datePublished">2017-06-16</time>
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<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/16/ComputerNetwork/">the review of Computer Network</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h3 id="试卷附录（掌握各字段含义）"><a href="#试卷附录（掌握各字段含义）" class="headerlink" title="试卷附录（掌握各字段含义）"></a>试卷附录（掌握各字段含义）</h3><ul>
<li>以太网MAC帧结构</li>
<li>IPv4数据报格式</li>
<li>UCP和TCP报文段格式</li>
<li>HDLC三种帧类型</li>
<li>汉明码</li>
</ul>
<h2 id="第1章——计算机网络体系结构"><a href="#第1章——计算机网络体系结构" class="headerlink" title="第1章——计算机网络体系结构"></a>第1章——计算机网络体系结构</h2><ul>
<li>计算机网络的概念<ul>
<li>把分布在不同地点且具有独立功能的多个计算机，通过通信设备和线路连接起来，在功能完善的网络软件运行环境下，以实现网络中资源共享为目标的系统
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<article id="post-DataBase" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2017/06/14/DataBase/" class="article-date">
<time datetime="2017-06-14T11:05:00.000Z" itemprop="datePublished">2017-06-14</time>
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<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/14/DataBase/">the review of the DataBase</a>
</h1>
</header>
<div class="article-entry" itemprop="articleBody">
<h2 id="第1章"><a href="#第1章" class="headerlink" title="第1章"></a>第1章</h2><h4 id="基本概念"><a href="#基本概念" class="headerlink" title="基本概念"></a>基本概念</h4><ul>
<li>DB</li>
<li>DBMS</li>
<li>DBS</li>
<li>DBA</li>
<li>三层模式和两级映像<ul>
<li>DB的数据结构<ul>
<li>逻辑模式</li>
<li>外模式</li>
<li>内模式</li>
</ul>
</li>
<li>两级映像
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<article id="post-PrincipleOfComputerOrg" class="article article-type-post" itemscope itemprop="blogPost">
<div class="article-meta">
<a href="/2017/06/14/PrincipleOfComputerOrg/" class="article-date">
<time datetime="2017-06-14T11:00:00.000Z" itemprop="datePublished">2017-06-14</time>
</a>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="article-title" href="/2017/06/14/PrincipleOfComputerOrg/">the review of the Principle of Computer Organization</a>
</h1>
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<div class="article-entry" itemprop="articleBody">
<h2 id="第1章"><a href="#第1章" class="headerlink" title="第1章"></a>第1章</h2><ul>
<li>计算机性能指标<ul>
<li>机器字长——计算机一次整数运算能够处理的二进制数据的位数</li>
<li>主频、时钟周期</li>
<li>CPI（每条指令周期数）——Clock cycle Per Instruction</li>
<li>MIPS（每秒执行多少百万条定点指令数）——Million Instructions Per Second</li>
<li>FLOPS（每秒执行浮点操作的次数）</li>
</ul>
</li>
<li>传统冯诺依曼体系是单指令流和单数据流系统<ul>
<li>存储器</li>
<li>运算器</li>
<li>控制器</li>
<li>输入设备</li>
<li>输出设备</li>
<li>相关特点<ul>
<li>指令和数据按地址寻访</li>
<li>二进制代码
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<ul class="archive-list"><li class="archive-list-item"><a class="archive-list-link" href="/archives/2017/06/">六月 2017</a></li></ul>
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<a href="/2017/06/21/branch/">branch</a>
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<a href="/2017/06/21/hello-world/">Hello World</a>
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<a href="/2017/06/19/CompilePrinciple/">the Points of Compile Principle</a>
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<a href="/2017/06/19/NetPoints/">the Points of Computer Network</a>
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<a href="/2017/06/16/ComputerNetwork/">the review of Computer Network</a>
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