3659639 WPEs wave-particle entities 2 3659633 WPEs Weak polyelectrolytes 2 3659638 WPEs walnut polyphenol extracts 1 3659637 WPEs Wearable Powered Exoskeletons 1 3659640 WPEs weighted permutation entropies 1 3659641 WPEs whole plant extracts 1 3659642 WPEs wind power enterprises 1 3659643 WPEs winter pollution episodes 1 3659644 WPEs wrinkled photonic elastomers 1