The studying results show that the classical elastic wave equation of spherical wave is only true for fixed amplitude phase and described only kinematic equation of phase velocity.
研究揭示经典的球面波波动方程只对固定振幅相成立，即只描述了相的运动方程，其波速为相速度。
2
The equations can be used to study both interactions of fixed-phase and random-phase gravity wave packets.
这组方程是研究固定相位和随机相位重力波相互作用问题的出发点。
3
Through a new feeding construction with phase-shifter, the main lobe of the pattern of the microstrip leaky-wave antenna can scan at a fixed frequency.