In network function virtualization, resource allocation is one of the key techniques to ensure QoS service requests in face uncertain traffic demand and fluctuation user services. The previous related works usually assume that a deterministic value then reallocate substrate resources deal with uncertainty during operation. response performance degradation caused by fluctuation, paper models cha...

Nowadays, due to the high expectations of customers in meeting their demand and the competition environment among service providers, employers are working to provide customers with new methods in the shortest possible time and in the best possible way to attract customer’s satisfaction and maximize profits. In this paper, the orienteering problem with variable profits, fractional objective func...