Papers by Keyword: Polynomial Approximation

Abstract: Jackson's theorem is an important result in the theory of approximation of function. The purpose of this article is to introduce a new kind of Qp spaces in the unit polydiscs. Jackson's approximation theorem is established in Qp spaces.

Abstract: In this paper, the computation method of the strip crown is analyzed using the measured strip thickness data on a hot strip product line. The better quality of the strip is achieved for the smaller crown and the closer of the mean thickness to the nominal thickness. The polynomial approximation method for the transverse thickness distribution of the strip is used, and the different degrees of the polynomial are selected for calculating the strip crown. The calculated results are compared with the output of the measuring system in a rolling factory.

Abstract: An AGPS (assisted global positioning system) positioning method was researched with polynomial approximation in this paper. Linear positioning errors were found through the analysis of an AGPS positioning algorithm with mobile station (MS) clock error. These errors were engendered to induce a bias of reference moment. The value of an objective function can be quadratically related to the deviation of reference time. Thus, the objective function curve was fitted with three reference time values, and the lowest point of curve to amend the reference time is determined. This method can eliminate linear positioning error.