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Orthogonal Polynomial Fitting for Pump Characteristic Curves |
ZHOU Long-cai, QIU Chuan-xin |
School of Water Resource and Hydropower, Wuhan University, Wuhan, Hubei 430072, China |
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Abstract Orthogonal polynomial is used to fit the characteristic curves of pump with rand om data to avoid the ill-conditioned system of equations that probably appears i n ordinary polynomial fitting. The Forsythe Recurrence Method is adopted to gene rate the orthogonal polynomial, and the degree of the polynomial is determined b y significance test. Using drawing program to make intuitive analysis for the co mputation, the method is shown to be practical by several actual examples.
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Received: 07 August 2013
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