固体与分子经验电子理论(EET理论)
empirical electron theory(EET) of solids and molecules
固体与分子经验电子理论EET理论
empirical electron theory EET of solids and molecu
对称双弹簧振子
symmetric double-spring oscillator
对称双弹簧振子系统
symmetric two-spring oscillator
二自由度两弹簧振子系统
two-spring-two-freedom vibration system
软弹簧duffing振子
softening Duffing oscillator
Duffing oscillators with soft spring
TRIZ发明问题解决理论理论
TRIZ theory of inventive problem solving theory