Scanning force microscopy ~SFM! of topography, frictional force, and stiffness on thin gelatin films reveals an entire spectrum of tribological behavior. Images display two distinct phases of gelatin whose characteristics relate to the degree of crystallinity. Dissimilar regimes of velocityand load-dependent friction and wear on each phase indicate glassy, rubbery, or melt behavior. Of fundamen...

This paper presents Neural Network (NN) model of Polymer Electrolyte Membran (PEM) Fuel Cell for electric vehicle. The NN model simplifies the conventional model that considered thermodynamics, electrochemistry, hydrodynamics and mass transfer theory. The NN has a multilayer feed forward network structure and is trained using a back propagation learning rule. The NN model is used to predict the...

A simple two-steps polymerization method was used to prepare a polyacrylamide hydrogel with a full interpenetrating network structure based on the sorption and porous properties of polyacrylamide superabsorbent. In conditions of 10 g acrylamide monomer, 0.04 g crosslinker for the first polymerization and the second polymerization, respectively, and the swelling ratio of 9, the hydrogel possesse...