COVID-19 FEM analysis Frenet trihedral GRU Gráficos por ordenador History of engineering & technology Informática Levenberg–Marquardt algorithm Miura-ori pattern NMR reconstruction Pareto front Technology: general issues adaptive rejection control aeroengine air flow medical sensor approximate entropy autoencoder biomechanics compliance compliant joint compliant mechanism convergence coupled motion decoupled motion delayed feedback denoising deployable mechanism differential evolution dimensional synthesis dispersion relation