Constrained optimization plays an important role in many decision-making problems and various real-world applications. In the last two decades, evolutionary algorithms (EAs) were developed still are developing under umbrella of computation. general, EAs mainly categorized into nature-inspired swarm-intelligence- (SI-) based paradigms. All these have some merits also demerits. Particle swarm (PS...

The vector-clock size necessary to characterize causality in a distributed computation is bounded by the dimension of the partial order induced by that computation. In theory the dimension can be as large as the number of processes in the computation, but in practice it is much smaller. We present an online algorithm to compute the dimension of a distributed computation. This algorithm requires...

This paper considers the parcel hub scheduling problem (PHSP) with unequal batch size inbound trailers, which is a combinatorial optimization problem commonly found in a parcel consolidation terminal in the parcel delivery industry (PDI). The problem consists of processing a large number of inbound trailers at a much smaller number of unload docks. The parcels in the inbound trailers must be un...

This article presents the preliminary results on a new branch-and-bound algorithm proposed for the single machine total tardiness problem with arbitrary release dates. The algorithm relies on dominance properties from the literature as well as a new branching condition. A new lower bounding technique for the problem is also introduced. The performance of the algorithm is compared to the perform...

In this paper, we propose a vibration damping optimization algorithm to solve a fuzzy mathematical model for the single-item capacitated lot-sizing problem. At first, a fuzzy mathematical model for the single-item capacitated lot-sizing problem is presented. The possibility approach is chosen to convert the fuzzy mathematical model to crisp mathematical model. The obtained crisp model is in the...