in this article, multiple-product pvrp with pickup and delivery that is used widely in goods distribution or other service companies, especially by railways, was introduced. a mathematical formulation was provided for this problem. each product had a set of vehicles which could carry the product and pickup and delivery could simultaneously occur. to solve the problem, two meta-heuristic methods...

In the past few decades, cutting-edge information and communication technology has been used in several ways to keep an eye on marine environment. Underwater wireless sensor networks (UWSNs) can measure amount of water soil conditions, such as salinity, moisture, movements, predict landslides. UWSNs are made up many underwater nodes (WSNs) that spread out across thalassic These have uses, inclu...

The demand for high-speed automatic train operation (ATO) system brings new opportunities and challenges the railway field. requirements of energy consumption, punctuality, safety smoothness are also increasing, especially research on saving trains ushers in a broader development space. This paper proposes quantitative functions four energy-saving performance indexes multi-objective optimizatio...