11. 案例 3 : - speed-sensitive wiper Problem : a wiper cannot wipe away rain drops on the windshield effectively when the car is sped up. Task : design a speed-sensitive wiper.
12. 長度變長 打到車窗的 水量 與三角形的 斜邊長 有 正比 關係 v C v R v C v R 水量 雨刷頻率 畢氏定理:
13. 案例 4 : determination of sitter’s motion A smart chair can monitor sitter’s posture and send messages of changing posture as a sitter is not sitting upright or working too long. What is the mathematical model to be implanted in the control chip?
14. Strategy : known- α,β & c a, b x, y α β c a b x y ( x, y ) Define regions of (x, y) for various warning signals