The first optimization technique, which is known as steepest descent, goes back to Gauss.

首先优化技术，这是被称为最速下降，可追溯到高斯。

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The first way is classical and consists of determining the parameters of the empirical expressions of the growth rate through the use of a nonlinear programming(NLP)optimization technique.

本论文采用两种方法来描述晶体生长率模型的设计，第一种方法是通过采用非线性规划最优化方法（NLP）决定晶体生长率经验公式的参数；

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The first way is classical and consists of determining the parameters of the empirical expressions of the growth rate through the use of a nonlinear programming(NLP)optimization technique.

本论文采用两种方法来描述晶体生长率模型的设计，第一种方法是通过采用非线性规划最优化方法（NLP）决定晶体生长率经验公式的参数；

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