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语言：python3
框架：Scikit-learn 内置数据集或通过其可以直接下载的数据集
其他：numpy,matplotlib,…
IDE:Jupyter Notebook,pycharm
以上有ANACONDA集成

人工智能>机器学习>深度学习
内容：KNN 、线性回归、多项式回归、逻辑回归、模型正则化、PCA、SVM、决策树、随机森林、集成学习、模型选择、模型调试
排名前三的算法：逻辑回归、决策树、随机森林、神经网络（深度学习基础）

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计算机的总线

总线的概述：
解决不同设备之间的通讯问题
USB = Universal Serial Bus 通用串行总线
PCI ISA总线 Thunderbolt总线
总线的作用：提供了对外连接的接口；不同设备可以通过USB接口进行连接；连接标准，促使外围设备接口的统一
分类：
-片内总线：高集成度芯片内部的信息传输线
-系统总线：CPU、主内存、IO设备、各组件之间的信息传输线

a、数据总线：双向传输各个部件的数据信息，数据总线的位数（总线宽度）一般与CPU位数相同（32位、64位）

b、地址总线：指定源数据或目的数据在内存中的地址，地址总线位数=n，寻址范围：0~𝟐𝒏

c、控制总线：控制总线是用来发出各种控制信号的传输线，监视不同组件之间的状态（就绪/未就绪）

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计算机发展简史

计算机发展的四个阶段

1946-1957 电子管计算机（埃尼阿克ENIAC）

  • 集成度小，空间占用大
  • 功耗高，运行速度慢
  • 操作复杂，更换程序需要接线
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