A Nonlinear Least Squares Fit procedure for analysis of immittance data of electrochemical systems

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Boukamp, Bernard A. (1986) A Nonlinear Least Squares Fit procedure for analysis of immittance data of electrochemical systems. Solid State Ionics, 20 (1). pp. 31-44. ISSN 0167-2738

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Abstract:A Nonlinear Least Squares Fit (NLLSF) program is described, with which frequency dispersion data of electrochemical systems can be analyzed in terms of an equivalent circuit. The NLLSF procedure uses a combination of an analytical and gradient search according to the Marquardt algorithm. Through the use of an unique Circuit Description Code (CDC) different equivalent circuits may be used with the program. The use of an analytical derivatives routine enhances the execution speed. The power of such a fit procedure is demonstrated in multi parameter fits, on synthetic and real data, performed by the program “EQIVCT”.
Item Type:Article
Copyright:© 1986 Elsevier Science
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/69721
Official URL:http://dx.doi.org/10.1016/0167-2738(86)90031-7
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