The best air fresheners for home don't just smell great—they also eliminate odor, last for hours, and cover a whole home with just a spritz.

Preconditioned Conjugate Gradient (PCG) method has been demonstrated to be effective in solving large-scale linear systems for sparse and symmetric positive definite matrices. One critical problem in ...

A method of constructing preconditioners for the IEODDM is proposed, and it needs a two-level decomposition, in which level-1 subdomain corresponds to the basic IE-ODDM subdomain, and level-2 ...