In this paper, the strong extremal principles have been proved for second or der linear elliptic equations on the domain which satisfies an interior cone condition.
本文对一般的二阶线性椭圆型方程，在满足内部锥条件时，证明了其强极值原理。
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The experiment for the noise at the area around the driver' s ears is conducted, the results show that this model can predict very well the interior noise around particular point in frequency domain.