a	Acceleration
Δx1, Δx2	Displacement
$F_f$ ($F_x F_y F_z$)	Friction (direction vectors)
$\Delta E$	Energy change
$T_g$	Glass transition temperature
${\theta }_0$	Bond angle
$r_0$	Bond length
$\phi$	Dihedral angle
$K_b$	Bond stretching force constant
$K_{\theta }$	Bond angle bending force constant
$C_i$	Dihedral angle polyharmony coefficient
${\sigma }_{ij}$	The collision diameter
${\epsilon }_{ij}$	The minimum of the potential for the interaction
$E_{bond}$ $E_{angle} E_{dihedral}$	Bond length, bond angle, dihedral angle energy
$E_{i-j}\left(r\right)$	Interaction energy
$C$	Energy displacement coefficient
${\left(E_K\right)}_{tol}$	Total kinetic energy
${\left(E_K\right)}_{com}$	Centroid kinetic energy
$m_i$	Atomic mass
$\overline{v_x}$ $\overline{v_y}$ $\overline{v_z}$	Average speed
${\left(E_K\right)}_j$	Atomic kinetic energy
$T_j$	Temperature