有限元模型采用单元边长比接近于1的高精度四边形单元划分网格。
Finite element model mesh use the high-precision rectangular unit which aspect ratio close to 1.
晶片的大小以边长表示，大晶片LED的品质比小晶片的要好。价格同晶片大小成正比。
The size of the wafer to wafer side said, the quality of LED is better than small chip. The price is proportional to the size of isomorphous.
结果表明，单元边长相同时，常数边界元比三角形线性有限元的精度要商。
The results show that constant boundary elements have higher accuracy than linear triangular finite elements when they have the same length of side.
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