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<!DOCTYPE html>
<html lang="en">
<!-- Head tag (contains Google-Analytics、Baidu-Tongji)-->
<head>
<!-- Google Analytics -->
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async="async" src="https://www.googletagmanager.com/gtag/js?id=UA-xxxxxx-xx"></script>
<script type="text/javascript">
window.dataLayer = window.dataLayer || [];
function gtag() {
dataLayer.push(arguments);
}
gtag('js', new Date());
gtag('config', 'UA-xxxxxx-xx');
</script>
<!-- Baidu Tongji -->
<script type="text/javascript">
// Originial
var _hmt = _hmt || [];
(function () {
var hm = document.createElement("script");
hm.src = "https://hm.baidu.com/hm.js?xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
<!-- Baidu Push -->
<script>
(function () {
var bp = document.createElement('script');
var curProtocol = window.location.protocol.split(':')[0];
if (curProtocol === 'https') {
bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
} else {
bp.src = 'http://push.zhanzhang.baidu.com/push.js';
}
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(bp, s);
})();
</script>
<meta charset="utf-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="google-site-verification" content="lxDfCplOZbIzjhG34NuQBgu2gdyRlAtMB4utP5AgEBc"/>
<meta name="baidu-site-verification" content="PpzM9WxOJU"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<meta name="description" content="It's a blog :)"/>
<meta name="keyword" content="livemylife,IT blog,Blog,Ryo"/>
<link rel="shortcut icon" href="/img/avatar/favicon.ico"/>
<!-- Place this tag in your head or just before your close body tag. -->
<script async="async" defer="defer" src="https://buttons.github.io/buttons.js"></script>
<!-- Bootstrap Core CSS -->
<link rel="stylesheet" href="/css/bootstrap.min.css"/>
<!-- Custom CSS -->
<link rel="stylesheet" href="/css/beantech.min.css"/>
<!-- Pygments Highlight CSS -->
<link rel="stylesheet" href="/css/highlight.css"/>
<link rel="stylesheet" href="/css/widget.css"/>
<link rel="stylesheet" href="/css/rocket.css"/>
<link rel="stylesheet" href="/css/signature.css"/>
<link rel="stylesheet" href="/css/catalog.css"/>
<link rel="stylesheet" href="/css/livemylife.css"/>
<!-- wave start -->
<link rel="stylesheet" href="/css/wave.css"/>
<!-- wave end -->
<!-- top start (article top hot config) -->
<link rel="stylesheet" href="/css/top.css"/>
<!-- top end -->
<!-- ThemeColor start -->
<link rel="stylesheet" href="/css/scroll.css"/>
<!-- ThemeColor end -->
<!-- viewer start (Picture preview) -->
<link rel="stylesheet" href="/css/viewer.min.css"/>
<!-- viewer end -->
<!-- Search start -->
<link rel="stylesheet" href="/css/search.css"/>
<!-- Search end -->
<!-- ThemeColor start -->
<link rel="stylesheet" href="/css/themecolor.css"/>
<!-- ThemeColor end -->
<!-- Custom Fonts -->
<!-- <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css" rel="stylesheet" type="text/css"> -->
<!-- Hux change font-awesome CDN to qiniu -->
<link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/4.5.0/css/font-awesome.min.css" type="text/css">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<!-- Hux Delete, sad but pending in China <link href='http://fonts.googleapis.com/css?family=Lora:400,700,400italic,700italic' rel='stylesheet' type='text/css'> <link
href='http://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800' rel='stylesheet' type='text/ css'> -->
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]> <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script> <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script> <![endif]-->
<!-- ga & ba script hoook -->
<link rel="canonical" href="https://squirrelune.github.io/">
<title>
RyoCY的后花园
</title>
<meta name="generator" content="Hexo 5.4.2"><style>mjx-container[jax="SVG"] {
direction: ltr;
}
mjx-container[jax="SVG"] > svg {
overflow: visible;
}
mjx-container[jax="SVG"][display="true"] {
display: block;
text-align: center;
margin: 1em 0;
}
mjx-container[jax="SVG"][justify="left"] {
text-align: left;
}
mjx-container[jax="SVG"][justify="right"] {
text-align: right;
}
g[data-mml-node="merror"] > g {
fill: red;
stroke: red;
}
g[data-mml-node="merror"] > rect[data-background] {
fill: yellow;
stroke: none;
}
g[data-mml-node="mtable"] > line[data-line] {
stroke-width: 70px;
fill: none;
}
g[data-mml-node="mtable"] > rect[data-frame] {
stroke-width: 70px;
fill: none;
}
g[data-mml-node="mtable"] > .mjx-dashed {
stroke-dasharray: 140;
}
g[data-mml-node="mtable"] > .mjx-dotted {
stroke-linecap: round;
stroke-dasharray: 0,140;
}
g[data-mml-node="mtable"] > svg {
overflow: visible;
}
[jax="SVG"] mjx-tool {
display: inline-block;
position: relative;
width: 0;
height: 0;
}
[jax="SVG"] mjx-tool > mjx-tip {
position: absolute;
top: 0;
left: 0;
}
mjx-tool > mjx-tip {
display: inline-block;
padding: .2em;
border: 1px solid #888;
font-size: 70%;
background-color: #F8F8F8;
color: black;
box-shadow: 2px 2px 5px #AAAAAA;
}
g[data-mml-node="maction"][data-toggle] {
cursor: pointer;
}
mjx-status {
display: block;
position: fixed;
left: 1em;
bottom: 1em;
min-width: 25%;
padding: .2em .4em;
border: 1px solid #888;
font-size: 90%;
background-color: #F8F8F8;
color: black;
}
foreignObject[data-mjx-xml] {
font-family: initial;
line-height: normal;
overflow: visible;
}
.MathJax path {
stroke-width: 3;
}
mjx-container[display="true"] {
overflow: auto hidden;
}
mjx-container[display="true"] + br {
display: none;
}
</style><link rel="alternate" href="feed.xml" title="RyoCY的后花园" type="application/atom+xml">
</head>
<!-- hack iOS CSS :active style -->
<body ontouchstart="" class="body--light body--light">
<!-- loading -->
<!-- ThemeColor -->
<!-- ThemeColor -->
<style type="text/css">
.body--light {
--light-mode: none;
--dark-mode: block;
}
.body--dark {
--light-mode: block;
--dark-mode: none;
}
i.mdui-icon.material-icons.light-mode {
display: var(--light-mode);
}
i.mdui-icon.material-icons.dark-mode {
display: var(--dark-mode);
}
</style>
<div class="toggle" onclick="document.body.classList.toggle('body--dark')">
<i class="mdui-icon material-icons light-mode"></i>
<i class="mdui-icon material-icons dark-mode"></i>
</div>
<script>
//getCookieValue
function getCookieValue(a) {
var b = document.cookie.match('(^|[^;]+)\\s*' + a + '\\s*=\\s*([^;]+)');
return b
? b.pop()
: '';
}
let themeMode = 'light';
if (getCookieValue('sb-color-mode') && (getCookieValue('sb-color-mode') !== themeMode)) {
let dbody = document.body.classList;
themeMode === 'dark' ? dbody.remove('body--dark') : dbody.add('body--dark');
}
//setCookieValue
var toggleBtn = document.querySelector(".toggle");
toggleBtn.addEventListener("click", function () {
var e = document.body.classList.contains("body--dark");
var cookieString = e
? "dark"
: "light";
var exp = new Date();
exp.setTime(exp.getTime() + 3 * 24 * 60 * 60 * 1000); //3天过期
document.cookie = "sb-color-mode=" + cookieString + ";expires=" + exp.toGMTString() + ";path=/";
});
</script>
<!-- Gitter -->
<!-- Gitter -->
<!-- Docs:https://gitter.im/?utm_source=left-menu-logo -->
<script>
((window.gitter = {}).chat = {}).options = {
room: 'your-community/your-room'
};
</script>
<script src="https://sidecar.gitter.im/dist/sidecar.v1.js" async defer></script>
<!-- Navigation (contains search)-->
<!-- Navigation -->
<nav class="navbar navbar-default navbar-custom navbar-fixed-top">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header page-scroll">
<button type="button" class="navbar-toggle">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">RyoCY的后花园</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<!-- Known Issue, found by Hux: <nav>'s height woule be hold on by its content. so, when navbar scale out, the <nav> will cover tags. also mask any touch event of tags, unfortunately. -->
<div id="huxblog_navbar">
<div class="navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li>
<a href="/">首页</a>
</li>
<li>
<a href="/about/">
关于
</a>
</li>
<li>
<a href="/archive/">
归档
</a>
</li>
<li>
<a href="/categories/">
分类
</a>
</li>
<li>
<a href="/tags/">
标签
</a>
</li>
<li>
<a class="popup-trigger">
<span class="search-icon"></span>搜索</a>
</li>
<!-- LangSelect -->
<!-- LangSelect start -->
<!-- LangSelect -->
<li>
<a id="lang-select-label"><i class="fa fa-globe"></i>
<span>
简体中文
</span>
<select id="lang-select" data-canonical="index.html">
<option value="cn" selected >
简体中文
</option>
</select>
</a>
</li>
<!-- LangSelect end -->
</ul>
</div>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
<!-- progress -->
<div id="progress">
<div class="line" style="width: 0%;"></div>
</div>
<script>
// Drop Bootstarp low-performance Navbar Use customize navbar with high-quality material design animation in high-perf jank-free CSS3 implementation
var $body = document.body;
var $toggle = document.querySelector('.navbar-toggle');
var $navbar = document.querySelector('#huxblog_navbar');
var $collapse = document.querySelector('.navbar-collapse');
$toggle.addEventListener('click', handleMagic)
function handleMagic(e) {
if ($navbar.className.indexOf('in') > 0) {
// CLOSE
$navbar.className = " ";
// wait until animation end.
setTimeout(function() {
// prevent frequently toggle
if ($navbar.className.indexOf('in') < 0) {
$collapse.style.height = "0px"
}
}, 400)
} else {
// OPEN
$collapse.style.height = "auto"
$navbar.className += " in";
}
}
</script>
<!-- Post Header (contains intro-header、signature、wordcount、busuanzi、waveoverlay) -->
<!-- Modified by Yu-Hsuan Yen -->
<!-- Post Header -->
<style type="text/css">
.body--light {
/* intro-header */
--intro-header-background-image-url-home: url('/img/header_img/head_bg.jpg');
--intro-header-background-image-url-post: url('');
--intro-header-background-image-url-page: url('/img/header_img/head_bg.jpg');
}
.body--dark {
--intro-header-background-image-url-home: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.2)), url('/img/header_img/head_bg.jpg');
--intro-header-background-image-url-post: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.2)), url('');
--intro-header-background-image-url-page: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.2)), url('/img/header_img/head_bg.jpg');
}
header.intro-header {
/*config*/
background-image: var(--intro-header-background-image-url-home);
/* background-image: url('/img/header_img/head_bg.jpg'); */
}
#signature {/*signature*/
background-image: url('/img/signature/sign.png');
}
</style>
<header class="intro-header">
<!-- Signature -->
<div id="signature">
<div class="container">
<div class="row">
<div class="col-lg-8 col-lg-offset-2 col-md-10 col-md-offset-1">
<div class="site-heading">
<h1>Hello World</h1>
<!-- 更改首页图片上文字 -->
<!-- <h1>RyoCY的后花园</h1> -->
<!--<hr class="small">-->
<span class="subheading">O ever youthful, O ever weeping</span>
</div>
</div>
</div>
</div>
</div>
<!-- waveoverlay start -->
<div class="preview-overlay">
<svg class="preview-waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto">
<defs>
<path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z"></path>
</defs>
<g class="preview-parallax">
<use xlink:href="#gentle-wave" x="48" y="0" fill=var(--gentle-wave1)></use>
<use xlink:href="#gentle-wave" x="48" y="3" fill=var(--gentle-wave2)></use>
<use xlink:href="#gentle-wave" x="48" y="5" fill=var(--gentle-wave3)></use>
<use xlink:href="#gentle-wave" x="48" y="7" fill=var(--gentle-wave)></use>
</g>
</svg>
</div>
<!-- waveoverlay end -->
</header>
<!-- Main Content (Post contains
Pager、
tip、
socialshare、
gitalk、gitment、disqus-comment、
Catalog、
Sidebar、
Featured-Tags、
Friends Blog、
anchorjs、
) -->
<!-- Main Content -->
<div class="container">
<div class="row">
<!-- USE SIDEBAR -->
<!-- Post Container -->
<div class="
col-lg-8 col-lg-offset-1
col-md-8 col-md-offset-1
col-sm-12
col-xs-12
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<a href="/cn/形式语言与自动机笔记/形式语言与自动机笔记/">
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形式语言与自动机笔记
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简介
NJU 2025fall 形式语言与自动机 课程笔记，按个人理解整理，不保证完全正确！
参考资料：课程讲义
DFA，NFA与正则语言
DFA：每个状态对每个输入符号有唯一的下一状态
DFA和NFA语言表达上是等价的：
能够用 NFA 表达的语言，一定存在某个 DFA，能够表达出相同的语言；
能够用 DFA 表达的语言，一定存在某个 NFA，能够表达出相同的语言。
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Posted by RyoCY on
2026-01-18
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<a href="/cn/ARK-Runtime源码阅读/源码阅读 ARK-Runtime/">
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源码阅读 ARK-Runtime
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源码阅读 ARK-Runtime
NJU 2025Fall源码阅读笔记
对应项目：OpenHarmony/ark_runtime_core
panda：CLI工具，用于执行方舟字节码文件（*.abc）文件
程序入口
文件路径：panda/panda.cpp 从这里开始执行。
1234int main(int argc, const char **argv){ return p......
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Posted by RyoCY on
2025-12-28
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<a href="/tags/#ARK-Runtime" title="ARK-Runtime">ARK-Runtime</a>
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<a href="/cn/Redis笔记/Redis笔记01/">
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Redis笔记01
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基础篇
NoSQL
分类
键值类型（Redis）
文档类型（MongoDB）
列类型（HBase）
Graph类型（Neo4j）
与SQL区别
----------
SQL
NoSQL
数据结构
结构化
非结构化
数据关联
关联的
无关联
查询方式
SQL查询
非SQL
事务特性
ACID
BASE
存储方式
磁盘
内存
拓展性
垂直
水......
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Posted by RyoCY on
2025-08-01
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<a href="/tags/#Redis" title="Redis">Redis</a>
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<a href="/cn/折腾日志/Win11使用WSL2安装Ubuntu时出现error解决记录/">
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Win11使用WSL2安装Ubuntu时出现error解决记录
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记录出错以及解决的流程。
先以管理员身份运行 PowerShell，执行命令wsl --install -d Ubuntu-22.04。
命令行提示如下信息：12345678请求的操作需要提升。部署映像服务和管理工具版本: 10.0.22621.2792映像版本: 10.0.22631.5335启用一个或多个功能[==========================100.0%=======......
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Posted by RyoCY on
2025-06-24
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<a href="/tags/#Ubuntu" title="Ubuntu">Ubuntu</a>
<a href="/tags/#WSL2" title="WSL2">WSL2</a>
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编译原理07
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ch9.2-12
期末周完全按照重点整理的笔记，比较草率
符号执行
符号执行是一种经典的路径敏感分析技术，它通过枚举并分析程序的每一条路径来实现程序分析。
符号执行作为一种重要的形式化方法和软件分析技术，采用抽象符号代替程序变量，程序计算的输出被表示为输入符号值的函数，根据程序的语义，遍历程序的执行空间。其在软件测试和程序验证中发挥着重要作用，并可以应用于程序漏洞和脆弱性的检测中。
𝝈......
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Posted by RyoCY on
2025-06-19
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<a href="/tags/#编译原理" title="编译原理">编译原理</a>
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编译原理06
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根据中间表示(IR)生成代码
代码生成器之前可能有一个优化组件
代码生成器的三个任务
指令选择: 选择适当的指令实现IR语句
寄存器分配和指派: 把哪个值放在哪个寄存器中
指令排序: 按照什么顺序安排指令执行
ch8-8.2
目标机模型
常见指令：
指令
解释
LD dst, addr
把位置 addr 上的值加载到位置 dst
LD r1, r2
寄存器到寄存......
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<p class="post-meta" style="margin: 10px 0;">
Posted by RyoCY on
2025-06-02
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<div class="tags">
<a href="/tags/#编译原理" title="编译原理">编译原理</a>
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编译原理05
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ch6.2
静态单赋值
静态单赋值（SSA）是一种中间代码表示形式，在该形式下，每个变量在程序的每个控制流路径上都仅被赋值一次。SSA 形式通过在适当的地方插入 φ 函数 来处理控制流合流点，使得代码既具有数据流分析的简洁性，又能够有效优化。
如果某个变量需要被重新赋值，会创建一个新的变量名称，例如 x1, x2, x3。
由于控制流可能发生分支和合流，因此在合流点需要一个 φ 函数来选择正......
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Posted by RyoCY on
2025-04-21
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