Seek the b ( t ) fieldwork curve and the time derivative curve dbz ( t ) / dt from the voltage decrease data generalized from field current that eliminating noise treated by wavelet ; 3 由经过小波消噪处理过的野外归一化的电压衰减数据求出b _ z ( t )实测曲线和它的时间导数曲线(
2.
The momentum equations are integrated in time using the four - stage explicit jameson runge - kutta algorithm and discretized in space using fourth order accurate compact scheme as well as the pressure poisson equation 动量方程的时间导数采用四步jamesonrunge - kutta法，空间导数和压力poisson方程均采用四阶高精度紧致格式。
3.
Nonphysical time is introduced and the lower - upper symmetric successive over - relaxation ( lu - ssor ) scheme is modified in navier - stokes equations . an application to natural unsteady viscous flow is presented to check for the capability of the procedure 在原控制方程中引入伪时间导数项，对上下对称逐次超松弛( lu - ssor )格式进行了修正。
