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在解决多元非线性回归问题时,如果根据问题的物理性质,总结过去的大量试验,能够经验的定出函数y和多因子x_i(i=1,2,…n)之间有(1)~1式表达的关系
In solving multiple nonlinear regression problems, if we summarize a large number of experiments in the past according to the physical properties of the problem, we can empirically determine that there are (1) ~ (2) between the function y and the multifactor x_i 1 expression