The acoustical wave equation is presented a serial spatial and time iterative equations and room acoustics field is simulated using finite difference time domainmethod.
时域有限差分法将声波基本方程表示为一个时间和空间的迭代方程组，实现对室内声场中低频段的模拟计算。
2
Based on single magnetic dipole model, the spatial filtering method of cardiac magnetic signal in the frequency domain was investigated.
本文利用心脏磁场单磁偶极子模型研究了心脏磁场强度检测信号的频域空间滤波法。
3
The basic theories and procedure of the MAP method and POCS method in spatialdomain are summarized.