Sewer network design: Heuristic algorithm for hydraulic optimisation

A Heuristic Transit Network Design Algorithm for Medium Size Towns

Optimisation Of Pressure Sewer Operation

The paper deals with the new control method developed for the pressure sewer systems. This method eliminates the disadvantages of currently common used on-off regulation. The major disadvantage is a transition of inconstancies of the effluent production into the sewage system. The propose method is primarily based on the principle of an allocation of the drawing off into the given time slots. T...

Reliable multi-product multi-vehicle multi-type link logistics network design: A hybrid heuristic algorithm

This paper considers the reliable multi-product multi-vehicle multi-type link logistics network design problem (RMLNDP) with system disruptions, which is concerned with facilities locating, transshipment links constructing, and also allocating them to the customers in order to satisfy their demand on minimum expected total cost (including locating costs, link constructing costs, and also expect...

A Simulated Annealing Algorithm for Unsplittable Capacitated Network Design

The Network Design Problem (NDP) is one of the important problems in combinatorial optimization. Among the network design problems, the Multicommodity Capacitated Network Design (MCND) problem has numerous applications in transportation, logistics, telecommunication, and production systems. The MCND problems with splittable flow variables are NP-hard, which means they require exponential time t...

Heuristic optimisation

1. The computational complexity of many problems means that optimal solutions are unlikely to be found in reasonable time in larger instances. 2. Problems may be ill-defined or data imprecise, so that an optimal solution based on estimated data will almost certainly not be optimal for the actual data. In such a situation it is preferable to obtain a robust solution that will be near-optimal ove...