Abstract: Systems and methods for generating high-pressure hydrogen are described. The hydrogen generation systems include hybrid electrolyzer systems and catalytic compression systems. The systems can directly generate gaseous hydrogen at a pressure of at least 700 bar.

Abstract: A method for training a knowledge graph alignment model includes selecting first candidate entity pairs from first entity pairs based on a predicted alignment probability of each of the first entity pairs, and calculating an alignment difficulty degree of each of the first candidate entity pairs. The method further includes selecting first target entity pairs from the first candidate entity pairs based on the alignment difficulty degree of each of the first candidate entity pairs, acquiring a labeled alignment result of each of the first target entity pairs, and obtaining a trained knowledge graph alignment model according to the predicted alignment probability and the labeled alignment result of each of the first target entity pairs.

Abstract: One aspect of the present invention is directed to a method of preparing encapsulated ureolytic cells. This method includes blending freeze dried ureolytic cells and an aqueous solution to form a base mixture; mixing the base mixture with a silicate-forming compound to form a blend comprising silica encapsulated ureolytic cells; and freeze drying the silica encapsulated ureolytic cells. The present invention also relates to a method of producing a self-healing concrete. This method comprises providing silica encapsulated freeze-dried ureolytic cells; mixing the silica encapsulated freeze-dried ureolytic cells with cement to form a mixture; and blending the mixture with a calcium salt and a urea solution to form a concrete mixture. Also disclosed are silica encapsulated ureolytic cells, a method of making a concrete form, and a cured concrete product.