At the same time, the main content, research method and step of real estate preliminary planning and its function and status and the question existing have deeply analysed at present.
Then the new stepfunction space is introduced and stability problem for the finite difference scheme is discussed by means of variational approximation method.
然后引入新的步长函数空间，并在这个空间上，采用变分近似法讨论该格式的稳定性问题。
3
The reconstruction of signed distance function (SDF) is an imperative and time-consuming step in level set method.