It is a partialdifferential equation satisfied by the electric field e.
这是一个,由电场e确定的偏微分方程。
2
Parameter identification problems belong to the partialdifferential equations inverse problems. They are also common in the field of natural science and engineering.
参数识别反问题是偏微分方程反问题的一类,也是在自然科学与工程技术的各领域比较常见的问题。
3
The research on multi-dimensional conservation laws is one of the most challenging direction in the field of nonlinear partialdifferential equation, it is very important and very difficult.