本文将二阶矩两相湍流模型和颗粒动力学理论结合，提出了各向异性的二阶矩稠密两相湍流模型。
Finally an anisotropic two-phase turbulence model for dense gas-particle flows combining the usm model with the particle kinetic theory is proposed.
通过对模型中的参数进行模糊化处理，用改进一次二阶矩法计算了地下水过量开采的模糊风险率。
The parameters of the model are fuzzily processed and the fuzzy risk can be evaluated by using the modified first order second moment method.
本文以尺寸链理论为基础，通过对二阶矩可靠性指标的应用到装配尺寸链的研究，建立计算机辅助公差优化设计的尺寸模型。
Thus a kind of computer aided optimum tolerance design model is built, by the reliability index of second moment based on the Dimension chain theory.
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