FEAT: add CS201, improve SDM263

courses/CS201.md

@@ -0,0 +1,12 @@
+# CS201 Discrete Mathematics
+
+## Notes
+- [XDZhelheim/CS201-Discrete-Math-Notes](https://github.com/XDZhelheim/CS201-Discrete-Math-Notes)
+
+## Projects
+Optional. It counts as –1~5% points towards your final grade (If your report is too hard to follow, you may even get –1 point for wasting professor's time).
+
+Detailed requirements can be found in Blackboard.
+
+## Exams
+You can find the past exam papers in the QQ group "牛蛙卷饼屋".

courses/SDM263.md

@@ -14,7 +14,7 @@ This course is the basis for the more advanced courses in control theory.
 Use NCSLab to do some very simple control experiments.
 
 ## Tools
-- NCSLab
+- [NCSLab](https://www.powersim.whu.edu.cn/) @Wuhan University
 - [root-locus](https://github.com/squarezhong/root-locus)
 
 ## Books
@@ -23,3 +23,10 @@ Use NCSLab to do some very simple control experiments.
 - Automatic Control Systems, 10th (Farid Golnaraghi , Benjamin C.Kuo)
 
 ## Links
+### Online Courses
+- [快 准 狠，只讲最有用的【自控原理】](https://www.bilibili.com/video/BV1dq4y1U77E)
+    适合考前复习或者夏令营准备
+- [【自动控制原理】_DR_CAN合集](https://space.bilibili.com/230105574/channel/collectiondetail?sid=1814627)
+    适合系统学习
+- [哈工大-自动控制原理](https://www.bilibili.com/video/BV1fV411n7Xz)
+    可能适合考研选手