A new approximate model or the earths gravity field is presented in this paper. We call it a mascon model.
本文给出了一个新的重力场近似模型，称之为质聚模型。
The model downloaded to a smart phone finds an approximate solution for a new set of parameters by reference to the precomputed solutions.
这个模型会被下载到智能手机上，通过引用预先计算好的结果来找到一个对应新的参数组的近似结果。
A new approximate iterative approach, QDA method, for the steady solution of flexible mechanism is put forward, based on the finite element analysis on the distributed parameter model.
在以分布质量为模型的仃限元分析基础，上提出了一种用以求解弹性机构稳态解的新的迭代近似方法（QDA方法）。
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