The theory on the implicit TVD schemes of second order time accuracy that is preferred in solving unsteady problems has been an open question for a long time.
用于非定常问题的时间二阶精度的隐式TVD格式的理论多年来一直是个空白。
It has second order accuracy in time.
该算法在时间上具有二阶精度。
Various borehole and formation conditions were simulated using the fourth order accuracy in space and second order accuracy in time centered finite difference method.
利用空间上具有四阶精度、时间上具有二阶精度的中心差分方法，数值模拟了几种复杂井眼条件下的波场。
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