3) acoustic far field
远程声场
4) far field
远方场
1.
According to the characteristics of the blood flow and the motion of vessel wall,a dynamic equation of blood pressure on cross section is founded,and then contacting simple wave theory of far field with reductive perturbation method,KdV equation of blood pressure and speed and motion of vessel wall is obtained.
根据血液流动和血管壁运动的特性 ,建立了血管横截面血液压力之间的动力学方程 ,并根据远方场简单波理论 ,采用减缩摄动方法 (reductiveperturbationmethod ,RPM)推导出了血流压力、速度和血管壁运动的KdV方
2.
Based on the far field and simple wave theory,a nonlinear Schrdinger (NLS) equation was established under the assumption of small amplitude and long wavelength.
在小振幅、长波长的一般情况下,根据远方场简单波理论,采用约化摄动法,得到了NLS方程,并讨论了存在NLS孤子的条件。
3.
Based on far field and simple waves theory,using vectorial perturbation method,are the equations transferred into KdV equations of transformation and obtained analytical solutions.
通过建立非线性双曲方程组,在n≥2和小振幅、长波长的一般情况下,根据远方场简单波理论,采用向量摄动法,将方程化为变形KdV方程,并给出了方程的解析解。
5) distance degree equation
远度方程
6) distant-dipole field
远程偶极场
1.
In three-dimensional magnetic resonance imaging,intermolecular multiple-quantum coherences(iMQC) come from distant-dipole field effects.
为了快速、高效地模拟和研究该对比度机理,本文运用如下算法:先对磁共振信号在实空间进行傅立叶变换,从而将磁化量从实空间变换至k空间,计算远程偶极场和扩散效应,然后将其变换回实空间来处理化学位移和弛豫等参数。
补充资料：爱因斯坦引力场方程
见广义相对论。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条