提出应用广义最大熵的方法对结构方程模型的参数进行估计，该方法能够处理有限的或者不完全数据。

IA new method based on generalized maximum entropy is applied in estimating parameters of structural equation model, which is meant for situations with limited or incomplete data.

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本文把不完全乔利斯基——共轭斜量解法用于求解二维二相模型的压力方程。

An incomplete Cholesky-conjugate gradient method is used to solve the pressure equation of two phase bi-dimension model.

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目前通常采用的抛物型方程，也是在射线理论的假设条件推导的。所以，其波动性质也是不完全的。

Also parabolic type equation commonly used now is derived from the hypothetic conditions of ray theory, so it does not include the wave natures completely.

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