Composite materials have been widely used in many industries due to their excellent mechanical properties. It is difficult analyze the integrity and durability of composite structures because own characteristics complexity load environments. Structural health monitoring (SHM) based on built-in sensor networks has evaluated as a method improve safety reliability reduce operational cost. With rap...

We show that a k k -stable set in finite group can be approximated, up to given error alttext="epsilon greater-than 0"> ϵ<!...