给出了线性算子逼近球面函数的逼近阶。
The approximation estimates of spherical functions by linder operators are given.
构造一个三层BP神经网络，实现了连续函数的逼近。
This paper introduced a three layer BP neural network, and realized the approximation of a continuous function.
最后将所提出的方法用于解决非线性函数的逼近问题。
Finally, the proposed method is applied to the problem of nonlinear function approximation.
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