<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[severe777777的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/severe777777</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; severe777777]]></copyright><item><title><![CDATA[惠普进不去制作的系统盘ubuntu22.04]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/163541885</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/163541885</guid><author>severe777777</author><pubDate>Thu, 06 Aug 2026 19:12:32 +0800</pubDate><description><![CDATA[通过 USB 硬盘盒启动时，内核读取根分区需要额外等待时间，否则会因硬盘响应超时而失败。你的 Ugreen 硬盘是 /dev/sda。，上面安装了 Ubuntu22.04 系统。的自动引导路径识别不完整：它只查找默认的。选择 Boot From EFI File。上：开机无法识别为系统盘，无法启动。，而 Ubuntu 的引导文件实际在。拦截了 Ubuntu 的引导程序。→ 选中 grubx64.efi。在 GRUB 菜单出现时，按 E。上：可以正常识别并启动。，EFI 分区是 sda2。]]></description><category></category></item><item><title><![CDATA[ubuntu22.04终端：安装Terminator后切换回默认终端]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/149283854</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/149283854</guid><author>severe777777</author><pubDate>Fri, 11 Jul 2025 22:14:15 +0800</pubDate><description><![CDATA[【代码】ubuntu22.04终端：安装Terminator后切换回默认终端。]]></description><category></category></item><item><title><![CDATA[docker安装ros]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/130291004</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/130291004</guid><author>severe777777</author><pubDate>Fri, 21 Apr 2023 17:06:42 +0800</pubDate><description><![CDATA[在另一个终端进入同一个容器：rostest是容器的名字。]]></description><category></category></item><item><title><![CDATA[参考文献.]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/130039964</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/130039964</guid><author>severe777777</author><pubDate>Sun, 09 Apr 2023 11:37:44 +0800</pubDate><description><![CDATA[[1]Howard A G, Zhu M, Chen B, et al. Mobilenets: Efficient convolutional neural networks for mobile vision applications[J]. arXiv preprint arXiv:1704.04861, 2017. 
[2]Sandler M, Howard A, Zhu M, et al. Mobilenetv2: Inverted residuals and linear bottlenecks]]></description><category></category></item><item><title><![CDATA[ubuntu下安装vscode]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/129333719</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/129333719</guid><author>severe777777</author><pubDate>Sat, 04 Mar 2023 14:04:49 +0800</pubDate><description><![CDATA[ubuntu下安装vscode]]></description><category></category></item><item><title><![CDATA[ubuntu20.4安装谷歌输入法]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/129332821</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/129332821</guid><author>severe777777</author><pubDate>Sat, 04 Mar 2023 12:37:05 +0800</pubDate><description><![CDATA[ubuntu20.4安装谷歌输入法]]></description><category></category></item><item><title><![CDATA[记录-前端相关学习网站]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/116740120</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/116740120</guid><author>severe777777</author><pubDate>Thu, 13 May 2021 10:36:44 +0800</pubDate><description><![CDATA[js:https://www.w3school.com.cn/js/index.asp
ts:https://www.tslang.cn/docs/handbook/typescript-in-5-minutes.html
es6:https://es6.ruanyifeng.com/

vue:https://cn.vuejs.org/v2/guide/computed.html
vuex:https://vuex.vuejs.org/zh/guide/state.html

ant desv...]]></description><category></category></item><item><title><![CDATA[python学习过程中遇到的bug(持续更新)]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/116653197</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/116653197</guid><author>severe777777</author><pubDate>Tue, 11 May 2021 14:36:44 +0800</pubDate><description><![CDATA[1、xlrd.biffh.XLRDError: Excel xlsx file; not supported

xlrd升级到2.0.1版本后，只支持.xls文件。要不然卸载了重新装个1.2.0的xlrd吧


pip uninstall xlrd
pip install xlrd==1.2.0




]]></description><category></category></item><item><title><![CDATA[ubuntu下安裝flameshot]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/113059079</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/113059079</guid><author>severe777777</author><pubDate>Sat, 23 Jan 2021 17:42:23 +0800</pubDate><description><![CDATA[sudo apt-get install flameshot




]]></description><category></category></item><item><title><![CDATA[配置mkvirtualenv环境时报错]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/112983928</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/112983928</guid><author>severe777777</author><pubDate>Fri, 22 Jan 2021 14:21:37 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[Ubuntu16开机蓝屏]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/112945478</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/112945478</guid><author>severe777777</author><pubDate>Thu, 21 Jan 2021 14:45:42 +0800</pubDate><description><![CDATA[ubuntu 16，蓝屏，只出现鼠标

step 1.Ctrl + Alt + F4, 进入命令行

step 2. 输入自己的账号和密码

step 3. sudo apt-get install xserver-xorg-lts-utopic

step 4. 根据提示输入 sudo dpkg --configure -a

step 5. 等执行完，在命令行输入reboot
...]]></description><category></category></item><item><title><![CDATA[Python metaclasses]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/111255568</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/111255568</guid><author>severe777777</author><pubDate>Wed, 16 Dec 2020 12:01:58 +0800</pubDate><description><![CDATA[https://blog.youkuaiyun.com/wwx890208/article/details/80644400

https://blog.ionelmc.ro/2015/02/09/understanding-python-metaclasses/
]]></description><category></category></item><item><title><![CDATA[git-创建分支]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/109802659</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/109802659</guid><author>severe777777</author><pubDate>Thu, 19 Nov 2020 10:12:02 +0800</pubDate><description><![CDATA[查看分支


git branch

创建本地分支


git branch Branch_Name

将本地的分支push上去


git push origin Branch_Name






]]></description><category></category></item><item><title><![CDATA[JZ5 - 用两个栈实现队列]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106616108</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106616108</guid><author>severe777777</author><pubDate>Mon, 08 Jun 2020 12:17:20 +0800</pubDate><description><![CDATA[题目描述

用两个栈来实现一个队列，完成队列的Push和Pop操作。 队列中的元素为int类型。

解题思路

栈1 用来作入队列
	栈2 用来出队列，当栈2为空时，栈1全部出栈到栈2，栈2再出栈（即出队列）

# -*- coding:utf-8 -*-
class Solution:
    def __init__(self):
        self.st1 = []
        self.st2 = []
    def push(self, node):
        # write c]]></description><category></category></item><item><title><![CDATA[JZ18 - 二叉树的镜像]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106614955</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106614955</guid><author>severe777777</author><pubDate>Mon, 08 Jun 2020 11:59:07 +0800</pubDate><description><![CDATA[题目描述

操作给定的二叉树，将其变换为源二叉树的镜像。

输入描述:


二叉树的镜像定义：源二叉树 
    	    8
    	   /  \
    	  6   10
    	 / \  / \
    	5  7 9 11
    	镜像二叉树
    	    8
    	   /  \
    	  10   6
    	 / \  / \
    	11 9 7  5

解题思路

递归 python/JS

# -*- coding:utf-8 -*-
# class Tree]]></description><category></category></item><item><title><![CDATA[JZ38 - 二叉树的深度]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106614166</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106614166</guid><author>severe777777</author><pubDate>Mon, 08 Jun 2020 11:16:16 +0800</pubDate><description><![CDATA[题目描述

输入一棵二叉树，求该树的深度。从根结点到叶结点依次经过的结点（含根、叶结点）形成树的一条路径，最长路径的长度为树的深度。

递归 JS

/* function TreeNode(x) {
    this.val = x;
    this.left = null;
    this.right = null;
} */
function TreeDepth(pRoot)
{
    // write code here
    if(pRoot == null){
        retur]]></description><category></category></item><item><title><![CDATA[JZ12-数值的整数次方]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106538154</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106538154</guid><author>severe777777</author><pubDate>Thu, 04 Jun 2020 10:41:03 +0800</pubDate><description><![CDATA[题目描述

给定一个double类型的浮点数base和int类型的整数exponent。求base的exponent次方。

保证base和exponent不同时为0



解题思路

笨方法

# -*- coding:utf-8 -*-
class Solution:
    def Power(self, base, exponent):
        # write code here
        ans = 1
        e = exponent
        if e&lt...]]></description><category></category></item><item><title><![CDATA[树-1-对称的二叉树]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106449085</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106449085</guid><author>severe777777</author><pubDate>Sat, 30 May 2020 23:43:46 +0800</pubDate><description><![CDATA[题目描述

请实现一个函数，用来判断一颗二叉树是不是对称的。注意，如果一个二叉树同此二叉树的镜像是同样的，定义其为对称的。



解题思路

对称二叉树，也就是说当前节点的左右节点的左右分支也都必须是对称的，即每个节点的左子树和右子树都是镜像。

递归比较左右节点，然后对左右节点的左右分支进一步递归比较


# -*- coding:utf-8 -*-
# class TreeNode:
#     def __init__(self, x):
#         self.val = x
#      .]]></description><category></category></item><item><title><![CDATA[发散思维-2-不用加减乘除做加法]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106419793</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106419793</guid><author>severe777777</author><pubDate>Fri, 29 May 2020 10:48:30 +0800</pubDate><description><![CDATA[题目描述

写一个函数，求两个整数之和，要求在函数体内不得使用+、-、*、/四则运算符号。

解题思路

利用位运算
两个二进制的相加结果是用一个异或门实现的；
两个二进制的进位结果是用一个与门来实现的。


result = num1 ^ num2;       // 每位相加，不带进位，在十进制中相当于 5+6得1
temp = (num1 &amp; num2) &lt;&lt; 1; // 进位，如果全为0，表示无需进位了

代码为


# -*- coding:utf-8 -*-
class So]]></description><category></category></item><item><title><![CDATA[发散思维-1-求1+2+3+...+n]]></title><link>https://blog.youkuaiyun.com/severe777777/article/details/106419428</link><guid>https://blog.youkuaiyun.com/severe777777/article/details/106419428</guid><author>severe777777</author><pubDate>Fri, 29 May 2020 10:09:09 +0800</pubDate><description><![CDATA[题目描述

求1+2+3+...+n，要求不能使用乘除法、for、while、if、else、switch、case等关键字及条件判断语句（A?B:C）。

解题思路

迭代，利用短路去掉if。当n为0或者负数时，自动忽略之后的递归

# -*- coding:utf-8 -*-
class Solution:
    def Sum_Solution(self, n):
        # write code here
        return n and (n+self.Sum_Solution(]]></description><category></category></item></channel></rss>