COVID-19 FEM analysis Frenet trihedral GRU History of engineering & technology 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 distance to a singularity dynamic balancing