This paper proposes a tabu search algorithm for the two-echelon vehicle routing problem with time windows and simultaneous pickup delivery (2E-VRPTWSPD), which is new variant of problem. 2E-VRPTWSPD involves three stages routing: (1) first-echelon vehicles start from depot to deliver cargoes satellites; (2) second-echelon satellites serve customers within in simultaneously manner finally return...

The development of convergent technology makes the drone expected to become a commercial delivery method for terminal logistics distribution. Although industry has begun experiment with coordinated transportation drones and vehicles, some limited assumptions have been made reduce complexity synchronization. This paper studies mathematical formulations efficient solution methodologies multi-visi...

This work presents a hybrid approach to solve distribution problem of Portuguese company in the automotive industry. The objective is determine minimum cost for daily operations, such as collecting and delivering goods multiple suppliers. Additional constraints are explicitly considered, time windows loading due limited capacity fleet terms weight volume. An exhaustive review state art was cond...

To maintain the optimum collision condition of the two beams, two special BPMs with 8-button electrodes, called OCTOPOS, were installed inside the super-conducting quadrupole magnets (QCSs) at the interaction region (IR) of KEKB. We have commissioned the OCTOPOS BPMs for simultaneous measurements of both the electron and positron beam positions from their composite signal. A collision orbital f...

In this paper, we address the problem of load selection and pickup-dispatching of multiple-load AGVs. Various load-selection rules and pickup-dispatching rules are proposed and studied. The objective of this study is twofold. We want to understand not only the performance of load-selection rules and pickup-dispatching rules in two performance criteria—throughput and tardiness, but also the effe...