01 Package 背包 Dynamic Programming

I've been studied 01 Package for so many times. But I keep forgetting it. It costs me so many energy every time I learn, especially for the optimization of space complexity. So I take notes this time.

Database Project: SQL Grammar Analysis Ⅰ

This is a very simple version of SQL grammar. For the sake of time, I just write some very basic usage.

Database Project: SQL Lexical Analyzer词法分析

数据库项目目前实现了一个简单的词法分析器，其中就是读取SQL语句中的字符，把他们转换成相应的Token。

HEXO主题开发——构建主题框架

主题重构Day1-2，详细地写一些搭建环境和框架遇到的bug，以己如何解决方法。详细记录了一些开发时的心理状态作为日后的乐趣。

Install Basemap of Python(Linux)

Basemap is a plug-in of matplotlib. Matplotlib is a drawing library that helps to draw data in multiple ways using python. And Basemap is used to draw maps. The followings are steps to install basemap.

Numerical Characteristics of Rando variables

第四章 随机变量的数字特征

一、数学期望

1. 离散型
   $$
   E(X)=\sum_{k=1}^{\infty} x_{k} p_{k}
   $$

   当上式发散时，$X$的数学期望不存在。

   
   
   Read More

PicGo+GitHub+Typora for Blog

Recently, while trying to accelerate my blog load speed, I also want to get all my pictures a cdn. Also I’m tired of uploading the picture every time I want to quote a picture in my post, So I found a softeware PicGo.

计算机中的数据表示

最近开课计算机组成原理，由于疫情原因，老师推荐的华中科技大学的秦磊华老师讲的MOOC上的课程。感觉学习难度比较大，因为基础薄弱，所以来总结一下学习的知识，加以巩固。