数学模型系以对图解法几何图形的解算为依据，并以逐步逼近计算法求解。
The mathematical model is based on the calculation of geometrical figures by graphic method and the solution is obtained by successive approximation.
多元回归分析在生物科学研究中应用甚为广泛，但至今为止，有关逐步回归方法计算机算法及计算技术方面的讨论却较为鲜见。
The Multivariate Regression Analysis (MRA) is widely used in the Study of biological science recently, but most of us are still not familiar to its algorithm and computation.
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