The technical terms for the subjects of his studies are anharmonicity, asphericity, inelasticity, as well as anisotropy.
他研究的主题的技术术语是非谐性，非球面性，非弹性以及畸形的。
2
Classical and quantum oscillators of quartic anharmonicity are solved analytically up to the second power of (weak-coupling constant) by using the multiple-scale perturbation theory.