Then the Laplace equation of the streamfunction Ψ is dissolved under a proper boundary condition, the value of the streamfunction Ψ at every grid point in the analysis area is obtained through the use of a finite difference method and an finite element method or the like and, then, the isopleth of the value of the streamfunction Ψ is plotted. そして、流れ関数Ψのラプラス方程式を適切な境界条件の下で解法し、有限差分法,有限要素法等を用いて解析領域中の各格子点の流れ関数Ψの値を求めた後、流れ関数Ψの値の等値線を描画する。 - 特許庁
In the analysis area (a silicon oxide area 2) of an electric field vector E where a condition that a divergence and rotation are zero is satisfied, a vector E to be vertical in relation is set in the electric field vector E, the vector E is expressed by usage in a streamfunction Ψ and the Laplace equation of the streamfunction Ψ is derived. 発散及び回転がゼロという条件を満足する電場ベクトルEの解析領域(酸化シリコン領域2)において、電場ベクトルEに垂直の関係となるベクトルEを設定し、ベクトルEを流れ関数Ψに用いて表現し、該流れ関数Ψのラプラス方程式を導出する。 - 特許庁