Rubik’s Cube is a widely popular mechanical puzzle that has attracted attention around the world because of its unique characteristics. As a classic brain-trai
<正>Kinematics~([1–3]) has evolved with and contributed significantly to human demands.For example,slider-crank mechanisms have been widely used in engines sin
THE Yi Nationality of Yun-nan and Sichuan Provinceswear colorful costumes andornaments.Take women’s hats forexample:they include lotus leafcloth hats,square ha