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<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=2">
<meta name="theme-color" content="#222">
<meta name="generator" content="Hexo 4.2.0">
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png">
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<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png">
<link rel="mask-icon" href="/images/logo.svg" color="#222">
<link rel="stylesheet" href="/css/main.css">
<link rel="stylesheet" href="/lib/font-awesome/css/all.min.css">
<link rel="stylesheet" href="/lib/fancybox.min.css">
<script id="hexo-configurations">
var NexT = window.NexT || {};
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</script>
<meta property="og:type" content="website">
<meta property="og:title" content="Hulieu">
<meta property="og:url" content="http://yoursite.com/index.html">
<meta property="og:site_name" content="Hulieu">
<meta property="og:locale" content="zh_CN">
<meta property="article:author" content="雨游璃风猫">
<meta name="twitter:card" content="summary">
<link rel="canonical" href="http://yoursite.com/">
<script id="page-configurations">
// https://hexo.io/docs/variables.html
CONFIG.page = {
sidebar: "",
isHome : true,
isPost : false,
lang : 'zh-CN'
};
</script>
<title>Hulieu</title>
<noscript>
<style>
.use-motion .brand,
.use-motion .menu-item,
.sidebar-inner,
.use-motion .post-block,
.use-motion .pagination,
.use-motion .comments,
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.use-motion .post-body,
.use-motion .collection-header { opacity: initial; }
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.use-motion .site-subtitle {
opacity: initial;
top: initial;
}
.use-motion .logo-line-before i { left: initial; }
.use-motion .logo-line-after i { right: initial; }
</style>
</noscript>
</head>
<body itemscope itemtype="http://schema.org/WebPage">
<div class="page-head">
<div class="index-head-image">
<img src="https://gitee.com/zhou-zikun/hulieu-image/raw/master/2saber1M.jpg"/>
<span>
<a href="#main-body">
<span class="arrow-down">
</span>
</a>
</span>
</div>
</div>
<div id="main-body" class="container use-motion">
<div class="headband"></div>
<header class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-brand-container">
<div class="site-nav-toggle">
<div class="toggle" aria-label="切换导航栏">
<span class="toggle-line toggle-line-first"></span>
<span class="toggle-line toggle-line-middle"></span>
<span class="toggle-line toggle-line-last"></span>
</div>
</div>
<div class="site-meta">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<h1 class="site-title">Hulieu</h1>
<span class="logo-line-after"><i></i></span>
</a>
<p class="site-subtitle" itemprop="description">似曾相识焰归来，小圆香径独徘徊</p>
</div>
<div class="site-nav-right">
<div class="toggle popup-trigger">
</div>
</div>
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<nav class="site-nav">
<ul id="menu" class="main-menu menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section"><i class="fa fa-home fa-fw"></i>优雅的首页</a>
</li>
<li class="menu-item menu-item-about">
<a href="/about/" rel="section"><i class="fa fa-user fa-fw"></i>本站的历程</a>
</li>
<li class="menu-item menu-item-tags">
<a href="/tags/" rel="section"><i class="fa fa-tags fa-fw"></i>随意的标签</a>
</li>
<li class="menu-item menu-item-categories">
<a href="/categories/" rel="section"><i class="fa fa-th fa-fw"></i>严谨的分类</a>
</li>
<li class="menu-item menu-item-archives">
<a href="/archives/" rel="section"><i class="fa fa-archive fa-fw"></i>最终的归档</a>
</li>
<li class="menu-item menu-item-friends">
<a href="/friends/" rel="section"><i class="fa fa-heartbeat fa-fw"></i>永远的朋友</a>
</li>
</ul>
</nav>
</div>
</header>
<!-- 切换背景（还在施工）-->
<div class="control">
<div class="control-gear" style="visibility: visible" onclick=open_control_menu()>
<span id="open-control-menu"> 主题 | SCHEME
<i class="fa fa-cog faa-spin animated" aria-hidden="true" style="font-size: 16px;"></i>
</span>
</div>
<div class="control-menu">
<ul class="control-menu-list">
<li id="saber-bg"> <i class="fa fa-bell" aria-hidden="true" onclick=saber_bg() title="默认背景"></i></li>
<li id="white-bg"> <i class="fa fa-mouse" aria-hidden="true" onclick=white_bg() title="纯白背景"></i></li>
<li id="cat-bg"> <i class="fa fa-cat" aria-hidden="true" onclick=cat_bg() title="猫咪背景"></i></li>
<li id="sun-mode"> <i class="fa fa-sun" aria-hidden="true" onclick=sun_mode() title="日间模式"></i></li>
<li id="dark-mode"> <i class="fa fa-moon" aria-hidden="true" onclick=dark_mode() title="夜间模式"></i></li>
</ul>
<!--
<ul class="control-menu-list">
<li id="totem-bg"> <i class="fa fa-bell" aria-hidden="true"></i></li>
<li id="pixiv-bg"> <i class="fa fa-pizza-slice" aria-hidden="true"></i></li>
<li id="white-bg"> <i class="fa fa-cog" aria-hidden="true"></i></li>
<li id="KAdots-bg"> <i class="fa fa-car" aria-hidden="true"></i></li>
</ul>
-->
</div>
</div>
<div class="back-to-top">
<i class="fa fa-arrow-up"></i>
<span>0%</span>
</div>
<main class="main">
<div class="main-inner">
<div class="content-wrap">
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<h2 class="post-title" itemprop="name headline">
<a href="/2021/02/21/Greece/" class="post-title-link" itemprop="url">Greece</a>
</h2>
<div class="post-meta">
<span class="post-meta-item">
<span class="post-meta-item-icon">
<i class="far fa-calendar"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="创建时间：2021-02-21 22:27:56" itemprop="dateCreated datePublished" datetime="2021-02-21T22:27:56+08:00">2021-02-21</time>
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，
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<div class="post-body" itemprop="articleBody">
<h2 id="希腊历史"><a href="#希腊历史" class="headerlink" title="希腊历史"></a>希腊历史</h2><p>青铜时代</p>
<ul>
<li>米诺斯文明 前2700-前1450 </li>
<li>迈锡尼文明 前1600-前1100</li>
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<a href="/2020/09/13/photoshop/" class="post-title-link" itemprop="url">小刁猫的PS小本本</a>
</h2>
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<time title="创建时间：2020-09-13 17:08:24" itemprop="dateCreated datePublished" datetime="2020-09-13T17:08:24+08:00">2020-09-13</time>
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<time title="修改时间：2020-09-23 23:14:10" itemprop="dateModified" datetime="2020-09-23T23:14:10+08:00">2020-09-23</time>
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<a href="/categories/%E5%B0%8F%E9%B1%BC%E5%B9%B2/" itemprop="url" rel="index"><span itemprop="name">小鱼干</span></a>
</span>
</span>
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<div class="post-body" itemprop="articleBody">
<ul>
<li>找问题对症下药</li>
<li>先整体后局部</li>
<li>先影调后色彩</li>
<li>反复微调</li>
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<a href="/2020/06/12/light-weapons/" class="post-title-link" itemprop="url">轻兵器</a>
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<time title="创建时间：2020-06-12 20:41:09" itemprop="dateCreated datePublished" datetime="2020-06-12T20:41:09+08:00">2020-06-12</time>
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<h3 id="切分数据集"><a href="#切分数据集" class="headerlink" title="切分数据集"></a>切分数据集</h3><p> <code>ls -l DATA_DIR | awk 'BEGIN{srand();} {printf "%s %s\n", rand(), $0}' | sort -k1n | awk '{gsub($1FS,""); print $0}' | awk '{print $9}' | awk 'FNR<=2000' | xargs -i sudo mv DATA_DIR/{} TEST-DIR/.</code></p>
<p><code>ls -l DATA_DIR | awk 'BEGIN{srand();} {print rand(), $0}' | sort -k1n | awk '{print $10}' | awk 'FNR<=2000' | xargs -i sudo mv DATA_DIR/{} TEST-DIR/.</code>【魏武精修版】</p>
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<h1 id="导论：分子结构和化学键模型"><a href="#导论：分子结构和化学键模型" class="headerlink" title="导论：分子结构和化学键模型"></a>导论：分子结构和化学键模型</h1><p>原子的<strong>Bohr模型</strong>认为电子在特定轨道上运行。原子轨道是解<strong>Schrodinger方程</strong>得来的。</p>
<p>薛定谔方程的解是波函数。包括四个量子数，<strong>主量子数</strong>（决定该原子的价层），<strong>角量子数</strong>（或者描述为spdf，定义空间分布），<strong>磁量子数</strong>（决定轨道在空间中的方向），<strong>自旋量子数</strong>（可以取$\pm 1/2$）</p>
<p><strong>能量最低原理</strong>要求电子填充能量较低的轨道，<strong>Pauli原理</strong>要求同一轨道需要<strong>自旋配对</strong>，<strong>洪特规则</strong>告诉我们<strong>简并轨道</strong>只需要逐个填充保持自选方向一致。</p>
<p><strong>Lewis结构</strong>和<strong>形式电荷</strong>只是一种记录方法。</p>
<p><strong>价电子互斥规则（VSEPR）</strong>：配基在空间上会尽量互相原理，这决定了分子的<strong>几何构型</strong>。孤对电子比较“大”一些，只是对观察现象的一个合理解释。</p>
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<h1 id="古典密码学"><a href="#古典密码学" class="headerlink" title="古典密码学"></a>古典密码学</h1><h2 id="几种古典密码"><a href="#几种古典密码" class="headerlink" title="几种古典密码"></a>几种古典密码</h2><p>移位密码（K=3即为凯撒密码）</p>
<script type="math/tex; mode=display">
e_k(x)=(x+K)\:mod\:26\\
d_k(y)=(x-K)\:mod\:26</script><p>代换密码</p>
<script type="math/tex; mode=display">
e_\pi(x)=\pi(x)\\
d_\pi(x)=\pi^{-1}(x)</script>
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<h1 id="C语言输入输出"><a href="#C语言输入输出" class="headerlink" title="C语言输入输出"></a>C语言输入输出</h1><h2 id="scanf"><a href="#scanf" class="headerlink" title="scanf"></a>scanf</h2><p>参数可变的函数</p>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">scanf</span><span class="params">(<span class="keyword">const</span> <span class="keyword">char</span> * , ...)</span></span>;</span><br></pre></td></tr></table></figure>
<p>第一个参数是格式字符串，后面的参数是变量的地址，函数作用是按照第一个参数指定的格式，将数据读入后面的变量</p>
<p>返回值</p>
<ul>
<li>>0 成功读入的数据个数</li>
<li>0 没有被赋值</li>
<li>EOF 第一个尝试输入的字符是EOF</li>
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<p>P/NP</p>
<h3 id="PCP-History"><a href="#PCP-History" class="headerlink" title="PCP History"></a>PCP History</h3><p>PCP Theorem begins at MIT in the early 1980s: <em>The Knowledge Complexity of Interactive Proof Systems(Goldwasser, Micali, Rackoff)</em>，文中给出如下定义：</p>
<p>定义 1：<strong>IP（Interactive Proofs）</strong>定义为一个验证者（verifier）和全能的证明者（prover）进行多项式轮交互，正确的论述一定通过 (“completeness”)，错误的论述会有至少1/2的概率不通过 (“soundness”) </p>
<p>独立于上述工作的<em>Arthur-Merlin Games: A Randomized Proof System, and a Hierarchy of Complexity Classes(Babai, Moran)</em>，定义如下：</p>
<p>定义 2：<strong>AM[k]</strong>是k轮的交互过程。</p>
<p>Babai证明了（定理 1）对任何常数k，AM[k]=AM[2]，因此AM[2]也被写作AM。AM[poly]和IP很相似，区别在于coin是否public，Goldwasser和Sipser很快证明了他们等价。</p>
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<p>两种手段</p>
<ul>
<li>抽象</li>
<li>分解</li>
</ul>
<p>八大原则</p>
<ul>
<li>依赖倒置原则（DIP）</li>
<li>开放封闭原则（OCP）</li>
<li>单一职责原则（SRP）</li>
<li>Liskov替换原则（LSP）</li>
<li>接口隔离原则（ISP）</li>
<li>对象组合优于类继承</li>
<li>封装变化点</li>
<li>面向接口编程</li>
</ul>
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