<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_32072853的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_32072853</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_32072853]]></copyright><item><title><![CDATA[QT5中QFileDialog教程]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115666504</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115666504</guid><author>qq_32072853</author><pubDate>Tue, 13 Apr 2021 14:35:45 +0800</pubDate><description><![CDATA[参考链接：
Qt5.5 QFileDialog类的使用方法

]]></description><category></category></item><item><title><![CDATA[页面置换算法]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115608186</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115608186</guid><author>qq_32072853</author><pubDate>Sun, 11 Apr 2021 22:16:48 +0800</pubDate><description><![CDATA[页面置换算法
前言
缓存算法历史已经很久了，但在楼主查询相关资料时，发现知识零碎，且原理介绍的很不详细，遂有了总结常用缓存算法文章的想法，以供广大朋友们查阅。本文是缓存系列的第一篇，知识侧重于初略的介绍，并未深入。
一、Second-chance
1、算法思想
这是FIFO算法的改进版，相对于FIFO算法立刻淘汰对象，该算法会检查待淘汰对象的引用标志位。如果对象被引用过，该对象引用位清零，重新插入队列尾部，像新的对象一样；如果该对象未被引用过，则将被淘汰。
2、工作原理
在FIFO算法的基础上，
*为缓存中]]></description><category></category></item><item><title><![CDATA[C++顺序表]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115319765</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115319765</guid><author>qq_32072853</author><pubDate>Tue, 30 Mar 2021 10:43:08 +0800</pubDate><description><![CDATA[参考链接:
C++顺序表的操作
顺序表(C++实现)–C语言

]]></description><category></category></item><item><title><![CDATA[贝叶斯线性回归]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115313844</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115313844</guid><author>qq_32072853</author><pubDate>Mon, 29 Mar 2021 22:50:57 +0800</pubDate><description><![CDATA[贝叶斯线性回归
参考链接：
贝叶斯分类器–文本分类的C语言实现

]]></description><category></category></item><item><title><![CDATA[机器学习算法]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115288946</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115288946</guid><author>qq_32072853</author><pubDate>Sun, 28 Mar 2021 22:06:37 +0800</pubDate><description><![CDATA[参考链接:
https://blog.youkuaiyun.com/sanjianjixiang/article/details/103467763


]]></description><category></category></item><item><title><![CDATA[QT安装教程]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115275174</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115275174</guid><author>qq_32072853</author><pubDate>Sun, 28 Mar 2021 02:00:34 +0800</pubDate><description><![CDATA[参考链接:
Qt5.9.0安装及更改组件过程

]]></description><category></category></item><item><title><![CDATA[决策树算法java]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115274504</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115274504</guid><author>qq_32072853</author><pubDate>Sun, 28 Mar 2021 00:45:57 +0800</pubDate><description><![CDATA[首先来看下本次案例创建得到的决策树长什么样

用于创建这棵决策树的数据如下（第一行的每一列为特征名称，最后一列为分类）

色泽,根蒂,敲声,纹理,脐部,触感,好瓜
青绿,蜷缩,浊响,清晰,凹陷,硬滑,好瓜
乌黑,蜷缩,沉闷,清晰,凹陷,硬滑,好瓜
乌黑,蜷缩,浊响,清晰,凹陷,硬滑,好瓜
青绿,蜷缩,沉闷,清晰,凹陷,硬滑,好瓜
浅白,蜷缩,浊响,清晰,凹陷,硬滑,好瓜
青绿,稍蜷,浊响,清晰,稍凹,软粘,好瓜
乌黑,稍蜷,浊响,稍糊,稍凹,软粘,好瓜
乌黑,稍蜷,浊响,清晰,稍凹,硬滑,好瓜
乌黑,稍蜷,]]></description><category></category></item><item><title><![CDATA[内存管理]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115223350</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115223350</guid><author>qq_32072853</author><pubDate>Fri, 26 Mar 2021 08:02:34 +0800</pubDate><description><![CDATA[http://www.myexceptions.net/cpp/332679.html
https://blog.youkuaiyun.com/lzm18064126848/article/details/48131425/

]]></description><category></category></item><item><title><![CDATA[Gnuplot 常用命令]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115156879</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115156879</guid><author>qq_32072853</author><pubDate>Wed, 24 Mar 2021 03:42:11 +0800</pubDate><description><![CDATA[之前，在「会画画的乌龟」一文中已对 Gnuplot 作了简单介绍。本文讲述如何使用 Gnuplot 将一组数据以散点图、折线图以及直方图的形式可视化。
数据的准备
下面这组数据是我的一篇论文中的实验数据……为了得到这组数据，折腾了一个多月。第一行文本是注释。第 1 列是 7 份数据的编号。第 2 列是数据量（点数）。第 3～5 列分别是三种数据处理算法所耗时间（秒）。
#ID    N         CR-tree        RR*-tree     MOO R-tree
a    408707   ]]></description><category></category></item><item><title><![CDATA[java实现ADT Heap]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115060124</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115060124</guid><author>qq_32072853</author><pubDate>Mon, 22 Mar 2021 03:20:18 +0800</pubDate><description><![CDATA[参考链接：
优先队列ADT_PrioQueue

]]></description><category></category></item><item><title><![CDATA[java.util.Comparator详解]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115060113</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115060113</guid><author>qq_32072853</author><pubDate>Mon, 22 Mar 2021 02:54:53 +0800</pubDate><description><![CDATA[参考链接:
http://www.360doc.com/content/08/0928/10/16915_1686535.shtml

]]></description><category></category></item><item><title><![CDATA[java反射总结]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115060098</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115060098</guid><author>qq_32072853</author><pubDate>Mon, 22 Mar 2021 02:13:56 +0800</pubDate><description><![CDATA[java反射总结
参考链接：
Java反射机制详解（一）

]]></description><category></category></item><item><title><![CDATA[centos常用命令]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/115040375</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/115040375</guid><author>qq_32072853</author><pubDate>Sun, 21 Mar 2021 08:55:24 +0800</pubDate><description><![CDATA[查看软件安装时间
rpm -qi 软件名 #查看软件安装时间


]]></description><category></category></item><item><title><![CDATA[scanf读取含空格的字符串]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114960004</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114960004</guid><author>qq_32072853</author><pubDate>Thu, 18 Mar 2021 04:55:11 +0800</pubDate><description><![CDATA[scanf读取含空格的字符串

]]></description><category></category></item><item><title><![CDATA[源码编译安装Postgresql 12.5]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114959911</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114959911</guid><author>qq_32072853</author><pubDate>Thu, 18 Mar 2021 01:55:28 +0800</pubDate><description><![CDATA[1 环境
操作系统： Centos 7.6 (cat /etc/redhat-release)
postgresql版本： 11.4（因为12还是beta版）
2 准备工作
2.1 安装gcc编辑器
[root@localhost postgresql-11.4]# gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
Copyright © 2015 Free Software Foundation, Inc.
本程序是自由软件；请参看源代码的]]></description><category></category></item><item><title><![CDATA[软件开发 java教程]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114959907</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114959907</guid><author>qq_32072853</author><pubDate>Thu, 18 Mar 2021 01:52:37 +0800</pubDate><description><![CDATA[软件开发请留言，程序代写请留言
]]></description><category></category></item><item><title><![CDATA[xv6]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114913689</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114913689</guid><author>qq_32072853</author><pubDate>Wed, 17 Mar 2021 03:01:23 +0800</pubDate><description><![CDATA[xv6 改变这个系统内置的scheduler  作业请联系本人

]]></description><category></category></item><item><title><![CDATA[C++11的内存序总结]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114908569</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114908569</guid><author>qq_32072853</author><pubDate>Wed, 17 Mar 2021 00:18:08 +0800</pubDate><description><![CDATA[对于C++11的6种并发查了不少相关资料，这里作一个总结和理解
std::memory_order_relaxed,std::memory_order_consume,std::memory_order_acquire
std::memory_order_release,std::memory_order_acq_rel,std::memory_order_seq_cst

粗浅理解（了解大概）
编译器优化而产生的指令乱序，cpu指令流水线也会产生指令乱序，总体来讲，编译器优化层面会产生的指令乱序，cpu层]]></description><category></category></item><item><title><![CDATA[C++类型转换]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114855184</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114855184</guid><author>qq_32072853</author><pubDate>Mon, 15 Mar 2021 22:18:53 +0800</pubDate><description><![CDATA[C++四种类型转换
C风格的强制类型转换(Type Cast)很简单，不管什么类型的转换统统是：
TYPE b = (TYPE)a
C++风格的类型转换提供了4种类型转换操作符来应对不同场合的应用。

static_cast                 静态类型转换。如int转换成char
reinterpreter_cast     重新解释类型
dynamic_cast            命名上理解是动态类型转换。如子类和父类之间的多态类型转换。
const_cast，             ]]></description><category></category></item><item><title><![CDATA[互斥锁 条件变量 信号量]]></title><link>https://blog.youkuaiyun.com/qq_32072853/article/details/114737434</link><guid>https://blog.youkuaiyun.com/qq_32072853/article/details/114737434</guid><author>qq_32072853</author><pubDate>Sat, 13 Mar 2021 11:40:53 +0800</pubDate><description><![CDATA[线程同步
为允许在线程或进程间共享数据，同步通常是必须的。常见的同步方式有：互斥锁、条件变量、读写锁、信号量。另外，对于进程间的同步，也可以通过进程间通信的方式进行同步，包括管道（无名管道、有名管道）、信号量、消息队列、共享内存、远程过程调用，当然也可以通过Socket来进行网络控制。
一.  互斥锁和条件变量是同步的基本组成部分
　　互斥锁和条件变量出自Posix.1线程标准，多用来同步一个进程中各个线程。但如果将二者存放在多个进程间共享的内存区中，它们也可以用来进行进程间的同步。

互斥锁

用于保护临]]></description><category></category></item></channel></rss>