KING

First something about training the data

• Training set –> learning algorithm –> hypothesis –> estimated data
• And we will use multiple features.
  • 

What is linear regression

• To say the idea in normal, we will have n feature
• And what we are going to do is to observe them and suppose that they should be in a linear method.
• And we should develop a way to find out the parameter to suit the hypothesis function.

What is machine learning?

• Machine learning is is a system that decide the system what to do next
  • but also improve the system with the answer that exist
• It is focus more on a feedback framework.
  • That is to say, the system may be not very smart at first
    • but it may be smarter after training
• What’s more, this area is one of the most important part in AI.
  • And the first aim to develop this method is that the scientist want to make the computer system ot have enough intelligence to develop AI.

ERP Note

ERP theory
Business workflow
ERP system modules
Benefits of ERP
ERP  system selection & implementation
ERP project evaluation
Application

Tree-based ensemble methods

random forest
gradient boosted decision trees

• main idea is greedy algorithm
  • 通过构造一棵决策树分类器
• 随机森林是通过构造10000课树

What is MVC?

• MVC模式（Model-View-Controller）是软件工程中的一种软件架构模式，把软件系统分为三个基本部分：模型（Model）、视图（View）和控制器（Controller）。
• MVC在这几年应该被非常多的人所熟悉了，因为相当多的web框架采用的是这套架构，此外，早在MFC横行的年代，MFC所采用的document/view架构也是MVC架构的变种。包括QT，它的model/view亦是如此。只不过它们都将MVC中的view和controller的功能整合到了一起。
• MVC的全称是model-view-controller architecture，最早被用在了smalltalk语言中。MVC最适合用在交互式的应用程序中。

First is the basic

• About #
  • these code are processed by the preprocessor
  • After the preprocessor read the code, the preprocessor directives will deal with it
  • then give the main code that are dealed with by the preprocessor directives to the complier
  • like #include <stdio.h>
    • It means that use the content in the stdio.h to replace the #
• About const
  • the value that is named const can not be modified
  • and it would be better to use const than define to define some const value.

• About passing the value

  • in C programming language
    • all the array is passed using reference(if the value change in the function, it will change.)
    • and all the value and const value are passed using value(if the value change in the function, it will not change.)

• About string I/O

  • gets
    • it is used to read a line in the content and store it as a parameter to pass to the array
    • the input line contains: a string and a newline
  • puts