方法利用非参数分段多项式估计和最小二乘法进行讨论。
Methods It is discussed by nonparametric piecewise polynomial estimation and least squares estimation.
这是正常的，因为从微积分可以知道，任一函数都可以用分段多项式来逼近。
This is normal, and the arbitrary function all can approach with dividing section multinomials because can know from infinitesimal calculus.
采用基于最小二乘的分段多项式，建立了不同温度下EGO传感器的静态模型。
The static models of EGO sensors for different temperature were built up using sectioned polynomial based on the least square.
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