<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[crayfish104的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/crayfish104</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; crayfish104]]></copyright><item><title><![CDATA[常用学术工具及网站（持续更新中）]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/167586700</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/167586700</guid><author>crayfish104</author><pubDate>Sun, 11 Oct 2026 17:40:37 +0800</pubDate><description><![CDATA[学术工具]]></description><category></category></item><item><title><![CDATA[手写一个X86操作系统实战：从零开始构建一个U盘启动的自制操作系统]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/132470105</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/132470105</guid><author>crayfish104</author><pubDate>Thu, 24 Aug 2023 11:13:02 +0800</pubDate><description><![CDATA[转自：https://www.cnblogs.com/bombless/archive/2010/12/28/writing-x86-os-part1.html
]]></description><category></category></item><item><title><![CDATA[各种编程语言编写的硬件端口程序教程]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/125873632</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/125873632</guid><author>crayfish104</author><pubDate>Tue, 19 Jul 2022 15:45:25 +0800</pubDate><description><![CDATA[端口编写程序教程网站]]></description><category></category></item><item><title><![CDATA[UML状态图和活动图（图文并茂）]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/124111712</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/124111712</guid><author>crayfish104</author><pubDate>Mon, 11 Apr 2022 22:41:35 +0800</pubDate><description><![CDATA[转自：UML状态图和活动图 - dy9776 - 博客园https://www.cnblogs.com/nucdy/p/5453207.html
]]></description><category></category></item><item><title><![CDATA[python中的int到底占几个字节？是无限的吗？]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/120639226</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/120639226</guid><author>crayfish104</author><pubDate>Thu, 07 Oct 2021 18:06:15 +0800</pubDate><description><![CDATA[理论是无限的，但不能超过当前所用PC的内存（除OS占用外）剩余量。



请参考：

1.python进行两个大数相加 - _天枢 - 博客园

2.小白学python第1问： int 占几个字节？ - hobotree - 博客园

3.python—大数加法_vivenn的博客-优快云博客

4.
...]]></description><category></category></item><item><title><![CDATA[汇编语言教程]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/120511360</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/120511360</guid><author>crayfish104</author><pubDate>Mon, 27 Sep 2021 16:22:49 +0800</pubDate><description><![CDATA[转自：汇编语言入门教程：汇编语言程序设计指南（精讲版）
]]></description><category></category></item><item><title><![CDATA[Lemon测评软件使用说明 （对比cena）]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/120511108</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/120511108</guid><author>crayfish104</author><pubDate>Mon, 27 Sep 2021 16:15:10 +0800</pubDate><description><![CDATA[转自：

Lemon测评软件使用说明 （对比cena） - lcdxjsj - 博客园
]]></description><category></category></item><item><title><![CDATA[编写bat文件教程]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/119943447</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/119943447</guid><author>crayfish104</author><pubDate>Fri, 27 Aug 2021 00:49:20 +0800</pubDate><description><![CDATA[转自：https://www.cnblogs.com/gered/p/10682741.html#autoid-1-0-0

目录

【1】简介

	【1.1】一般形式
		【1.2】基本了解
		【1.3】核心参数/d /l /r /f
	
	【2】最佳实践
	【2.1】获取文件每行内容
		【2.2】在for中执行多条命令
		【2.3】for的常用遍历
	
	【3】for查看文件与目录
	【3.1】目录结构
		【3.2】获取该目录下所有层级目录和文件
		【3.3】获取某个路径下递归的所有文件
..]]></description><category></category></item><item><title><![CDATA[用clock()函数计时的坑]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/119912464</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/119912464</guid><author>crayfish104</author><pubDate>Wed, 25 Aug 2021 15:31:13 +0800</pubDate><description><![CDATA[程序中经常用time()函数来返回当前系统时间的秒数，来计时或计算时间差。如果需要用到更高精度的时间，就会自然想到用clock()函数。想当然的认为它返回从程序开始tick数，用clock()/CLOCKS_PER_SEC就能得到以秒计数的时间了。然而结果不是这样，看下面的程序log。一行开头是系统时间，后面是clock()算出来的，明显比系统时间要慢不少。

2019-03-06 17:47:55.865 16213-18332/ E/jniUtil-jni: cur_time 3.399163
2019]]></description><category></category></item><item><title><![CDATA[endnote怎样才能高效将PDF论文添加到已导入的文献信息?]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/119305594</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/119305594</guid><author>crayfish104</author><pubDate>Sun, 01 Aug 2021 23:20:18 +0800</pubDate><description><![CDATA[转自：https://www.zhihu.com/question/389538134/answer/1177788328
]]></description><category></category></item><item><title><![CDATA[中国余数定理(Chinese Remainder Theorem)]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/118057544</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/118057544</guid><author>crayfish104</author><pubDate>Sat, 19 Jun 2021 18:30:56 +0800</pubDate><description><![CDATA[中国余数定理也叫孙子定理记录在《孙子算经》中：“今有物不知其数，三三数之剩二（除以3余2），五五数之剩三（除以5余3），七七数之剩二（除以7余2），问物几何？”

关于孙子算经这道题的解法宋朝数学家秦九韶于1247年《数书九章》卷一、二《大衍类》对“物不知数”问题做出了完整系统的解答。明朝数学家程大位将解法编成易于上口的《孙子歌诀》：

三人同行七十稀，五树梅花廿一支，七子团圆正半月，除百零五使得知。

即：先找到5与7公倍数中余3为1的数=70，3与7公倍数中余5为1的数=21，3与5公倍数中余7为1的数]]></description><category></category></item><item><title><![CDATA[位图文件大小的精准计算方法]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/118031793</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/118031793</guid><author>crayfish104</author><pubDate>Fri, 18 Jun 2021 18:28:16 +0800</pubDate><description><![CDATA[8位（bit）位图：彩色版中有2^8=256种颜色，具体哪256种颜色可由调色板灵活规定，因此每个像素点最多有256种情况（颜色），故刚好可用两位十六进制码（16^2=256）表示，占1字节。一幅512×512的8位位图大小计算方法：位图文件头（14字节）+位图信息头（40字节）+调色板（256×彩色表4字节）+实际像素点占内存（512×512×1字节）=263 222字节（Byte）。

 24位位图：又名RGB真彩色图，含2^24=16 777 216=16M色，没有彩色表，原因上文已说明。每...]]></description><category></category></item><item><title><![CDATA[旅行商(TSP)问题专题——多种方法对比]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/117020671</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/117020671</guid><author>crayfish104</author><pubDate>Wed, 19 May 2021 11:09:06 +0800</pubDate><description><![CDATA[转自：https://www.jianshu.com/p/43aa80069265
]]></description><category></category></item><item><title><![CDATA[0-1背包问题——回溯法]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/117020589</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/117020589</guid><author>crayfish104</author><pubDate>Wed, 19 May 2021 11:08:08 +0800</pubDate><description><![CDATA[转自：https://www.jianshu.com/p/5fb5dca10bb0


]]></description><category></category></item><item><title><![CDATA[TSP问题—近似算法]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/115936299</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/115936299</guid><author>crayfish104</author><pubDate>Wed, 21 Apr 2021 10:01:23 +0800</pubDate><description><![CDATA[这篇文章讲得很好并有图例、代码说明。

转自：https://www.jianshu.com/p/d1e004bdea8d
]]></description><category></category></item><item><title><![CDATA[Static全局变量（函数）与普通的全局变量（函数）的区别]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/115877150</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/115877150</guid><author>crayfish104</author><pubDate>Mon, 19 Apr 2021 23:05:39 +0800</pubDate><description><![CDATA[转自：https://www.cnblogs.com/love-yh/p/7507630.html
]]></description><category></category></item><item><title><![CDATA[Python学习资源（持续更新中...）]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/115831209</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/115831209</guid><author>crayfish104</author><pubDate>Sun, 18 Apr 2021 15:27:39 +0800</pubDate><description><![CDATA[1.49个Python学习资源（从基础到高级应用都有）：https://mp.weixin.qq.com/s/hIMwss4h5k10oLanCYYS1g




]]></description><category></category></item><item><title><![CDATA[【解释比较形象好理解】你稀里糊涂学的算法复杂度，原来这么简单！]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/115830910</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/115830910</guid><author>crayfish104</author><pubDate>Sun, 18 Apr 2021 15:19:05 +0800</pubDate><description><![CDATA[转自：https://mp.weixin.qq.com/s/aFdpF2uk4UP5lKMmyZ8t9g
]]></description><category></category></item><item><title><![CDATA[【中文字幕】快速傅里叶变换(FFT)——有史以来最巧妙的算法？]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/115611971</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/115611971</guid><author>crayfish104</author><pubDate>Mon, 12 Apr 2021 09:14:05 +0800</pubDate><description><![CDATA[转自：

https://www.bilibili.com/video/BV1za411F76U?share_source=copy_web
]]></description><category></category></item><item><title><![CDATA[各种模拟仿真系统收集汇总（不断更新.....）]]></title><link>https://blog.youkuaiyun.com/crayfish104/article/details/113954835</link><guid>https://blog.youkuaiyun.com/crayfish104/article/details/113954835</guid><author>crayfish104</author><pubDate>Mon, 22 Feb 2021 20:50:54 +0800</pubDate><description><![CDATA[1.RTSim实时系统模拟器（开源）:http://rtsim.sssup.it/

它是用C ++编写的用于模拟实时控制系统的编程库的集合，它主要用于试验新的调度算法和解决方案。因此，它包含了已经实施的Retis Lab开发的大多数调度算法。适用于比较新调度算法性能的通用仿真平台。RTSim当前与许多系统兼容，包括Linux的多个发行版，最新的FreeBSD，Mac OS X和Cygwin。此外，该软件已经在GCC的所有主要版本（从2.96到4.0.1）中进行了测试。在Windows下，也可以使用MinG]]></description><category></category></item></channel></rss>