更重要的是二维体系有望将红利贴现模型、CAPM、Fama&French的三因素模型和APT模型统一，形成一个包含二维定价因子的新资产定价模型。
But most importantly, it can unify all the asset-pricing models to get a new asset-pricing model containing pricing factors of the two dimensions.
未知背景的灰色体系的定量分析通常需要二维数据。
The two-way data is usually necessary for the quantitative analysis of the gray system.
以有限体积法为核心，建立了求解二维浅水方程和对流扩散方程的模型体系。
Based on the Finite Volume Methods (FVM), model system is developed to solve the 2d shallow water equation and convection-diffusion equation.
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