polynomial approximation
...多项式近似法 [gap=953] pulverized coal;mixing;Hardgrove grindability index;least square approximation;polynomial approximation ...
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在求解域上，利用迦辽金法，将泊松方程的非齐次部分用一个5阶多项式近似表示，而这些多项式对应的方程特解可以很容易获得。
In the solution domain, thePoisson equation is approximated with the 5-order polynomial using Galerkin method, and the particular solution of the polynomial can be determined easily.
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