Parabolic curve function, power function, Richards equation and single molecularequation, related tree height to diameter at breast height and widely used in forest gap model, were analysed.
By means of the equation and scheme of molecular reorientation, the pulsation feature of the diffraction beam was illustrated qualitatively.
给出了液晶分子取向力矩平衡方程从理论上解释了这种现象。
3
The equation of the molecular orientational distribution function was obtained by two-particle cluster approximation and solved by an iterative method.