force-constant
2.Planar Force-constant Model for Phonons in Wurtzite GaN and AIN: Application to Hexagonal GaN/AIN Superlattices
3.Based on the lattice dynamics with force-constant matrix, we investigated the vibrational properties of GaAs/AlAs superlattice.
4.And then we study the thermal properties of GaAs/AlAs superlattice by lattice dynamics with force-constant matrix and first principle.
5.This method can be used to determine the force constant of adsorbate molecule itself and the interaction force constants between adsorbate molecules with the help of the IRAS, EELS and LEED experimental data of adsorbate. The vibrational coupling effcts of CO molecules on Cu(111) face with (3~(1/2) ×3~(1/2))R30° structure are discussed in detail.
6.In order to investigate the behavior of steel beam to concrete wall(SBCW) joints in steel concrete mixed structures under constant shear force and constant moment exerted by gravity, as well as cyclic axial force exerted by earthquakes, experiments on 3 full scale specimens of SBCW joints were conducted.

