The paper reports that sparse regression with Legendre polynomials yields UTCI approximations with lower mean error, lower root-mean-square error, and fewer large errors than the standard sixth-degree polynomial.
An empirical study on leveraging logs for debugging production failures,
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Approximating the universal thermal climate index using sparse regression with orthogonal polynomials
The paper reports that sparse regression with Legendre polynomials yields UTCI approximations with lower mean error, lower root-mean-square error, and fewer large errors than the standard sixth-degree polynomial.