Using two-flow model, small perturbation theory and solvable conditions of one-order linear equations, a dispersion equation of pressurewave in horizontal air-liquid bubbly flow was proposed.
利用两流体模型、小扰动原理和线性一阶齐次方程组有解的条件，得到了气液泡状流型下的压力波色散方程。
2
Through sifting the characteristic parameters of artery pulse wave, a multiple regression equation to measure the rat artery pressure was developed indirectly.
通过提取动脉脉搏波特征参数，建立了间接测定大鼠动脉血压的多元回归方程。
3
The equation of displacement wave and sound pressure wave in the sound velocity experiment are derived. And their relation is analyzed.