<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[hitWeek的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/hitWeek</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; hitWeek]]></copyright><item><title><![CDATA[PyTorch入门笔记-matmul函数详解]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/120961517</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/120961517</guid><author>hitWeek</author><pubDate>Mon, 25 Oct 2021 21:58:37 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[linux shell 指令 诸如-d, -f, -e之类的判断表达式]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/120718141</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/120718141</guid><author>hitWeek</author><pubDate>Tue, 12 Oct 2021 10:16:51 +0800</pubDate><description><![CDATA[文件比较运算符
-e filename  如果 filename存在，则为真  [ -e /var/log/syslog ]
-d filename  如果 filename为目录，则为真  [ -d /tmp/mydir ]
-f filename  如果 filename为常规文件，则为真  [ -f /usr/bin/grep ]
-L filename  如果 filename为符号链接，则为真  [ -L /usr/bin/grep ]
-r filename  如果 filename可读，则为真]]></description><category></category></item><item><title><![CDATA[为什么区间要写成左闭右开？]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/120696436</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/120696436</guid><author>hitWeek</author><pubDate>Mon, 11 Oct 2021 09:12:17 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[Java Queue中 add/offer，element/peek，remove/poll区别]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/115175763</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/115175763</guid><author>hitWeek</author><pubDate>Wed, 24 Mar 2021 14:07:27 +0800</pubDate><description><![CDATA[Java Queue中 add/offer，element/peek，remove/poll中的三个方法均为重复的方法，在选择使用时不免有所疑惑，这里简单区别一下：
1、add()和offer()区别:
add()和offer()都是向队列中添加一个元素。一些队列有大小限制，因此如果想在一个满的队列中加入一个新项，调用 add() 方法就会抛出一个 unchecked 异常，而调用 offer() 方法会返回 false。因此就可以在程序中进行有效的判断！
2、poll()和remove()区别：
remo]]></description><category></category></item><item><title><![CDATA[协方差矩阵(covariance matrix)是半正定的(positive semi-definite)证明]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/109235355</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/109235355</guid><author>hitWeek</author><pubDate>Fri, 23 Oct 2020 09:11:03 +0800</pubDate><description><![CDATA[原文链接：https://zhuanlan.zhihu.com/p/44860862

]]></description><category></category></item><item><title><![CDATA[理解最小二乘解]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/108975292</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/108975292</guid><author>hitWeek</author><pubDate>Fri, 09 Oct 2020 11:13:39 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[numpy中的rand, randn, randint,random_sample用法]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/108904857</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/108904857</guid><author>hitWeek</author><pubDate>Fri, 02 Oct 2020 21:06:20 +0800</pubDate><description><![CDATA[import numpy as np

x1 = np.random.rand(3,4)  # 生成(0,1)均匀分布随机数，形状 = (3行，4列）
x2 = np.random.randn(2,3,4)    # 生成标准正态分布随机数，形状 =(2层，3行，4列）
x3 = np.random.randint(1,4,(5,3))      # 生成[1,4)随机整数，形状 =(5行,3列）
x4 = np.random.random_sample(5)  # 生成[0,1)随机数，形状 =1行(5个]]></description><category></category></item><item><title><![CDATA[对软件构造课程的小结]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/107283838</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/107283838</guid><author>hitWeek</author><pubDate>Sat, 11 Jul 2020 14:22:01 +0800</pubDate><description><![CDATA[世事难料，没想到以全部线上的方式完成《软件构造》这门非常硬核的课程，这为本科学习生活增添了难忘的记忆。明天就是这门课的期末考试，祝自己能取得一个好成绩。
对于这门课的硬核，我早有耳闻。学长们说大二有两门引进国外的课程——Introduction to Computer Systems 和Software Construction，对于前者，上学期已经见识到了它的威力；而后者，据学长们介绍实验量巨大，并且这句话得到了有效的印证。不过值得庆幸的是，我们这学期较以往去掉了一些章节和实验，任务量有所减轻。
我觉得，]]></description><category></category></item><item><title><![CDATA[【第三章】《深入理解计算机系统》学习笔记]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/103587429</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/103587429</guid><author>hitWeek</author><pubDate>Tue, 17 Dec 2019 20:51:59 +0800</pubDate><description><![CDATA[临近期末，懒得排版，就把截图发上来了:(










]]></description><category></category></item><item><title><![CDATA[【第二章】《深入理解计算机系统》学习笔记]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/103587233</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/103587233</guid><author>hitWeek</author><pubDate>Tue, 17 Dec 2019 20:36:49 +0800</pubDate><description><![CDATA[临近期末，懒得排版，就把截图发上来了:(






]]></description><category></category></item><item><title><![CDATA[概率论《随机变量及其分布》笔记]]></title><link>https://blog.youkuaiyun.com/hitWeek/article/details/103586992</link><guid>https://blog.youkuaiyun.com/hitWeek/article/details/103586992</guid><author>hitWeek</author><pubDate>Tue, 17 Dec 2019 20:21:54 +0800</pubDate><description><![CDATA[]]></description><category></category></item></channel></rss>