The least square method in the determination of thermal diffusivity using a flash method
نویسندگان
چکیده
2014 This paper is devoted to the description of a fitting method of experimental data for the model of Parker et al. [1] used in thermal diffusivity measurements by a laser flash method. The presented method is adapted to the fitting case when the noise frequencies are in the spectral band of the transient signal, thus making the filtering by a low-pass band filter difficult if not impossible. The method of numerical minimization of the least square function shown by Booth and Booth [2] is used and an example of its application is presented. Tome 21 No 2 FÉVRIER 1986 Revue Phys. Appl. 21 (1986) 83-86 FÉVRIER 1986, Classification Physics Abstracts 44.10 65.90 66.70
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