本文构造了一种混合样条函数，它是用一次多项式函数及指数函数的结合来表示的。
In this paper we describe the construct ion of a new type of blend spline and study their interpolation formulas and estimation of error.
对每个候选变化点，经过一次判断即可确定多项式的合适阶次。
At each candidate change point, a reasonable order of the polynomial function can be determined by once estimating.
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