One challenge in today’s district heating systems is the relatively high distribution heat loss. Lowering temperatures one way to reduce operational costs resulting from losses, while changing system steel pipes plastic and concept can investment costs. The result that overall life cycle cost of reduced, leading improved competitiveness versus individual options. main aim this study was determi...

Abstract The generalizations of rough sets based on topological structures have become the hot topic set theory. In present article, notion $$j$$ j -neighborhood space and related concept -simply open sets, three new methods for generalizing Pawlak are proposed their properties studied. These compared with so...