M. Schyns ∗ Abstract. We present an algorithm based on an Ant Colony System to deal with a broad range of Dynamic Capacitated Vehicle Routing Problems with Time Windows, (partial) Split Delivery and Heterogeneous fleets (DVRPTWSD). We address the important case of responsiveness. Responsiveness is defined here as completing a delivery as soon as possible, within the time window, such that the c...

This paper addresses a large-scale power plant maintenance scheduling and production planning problem, which has been proposed by the ROADEF/EURO Challenge 2010. We develop two lower bounds for the problem: a greedy heuristic and a flow network for which a minimum cost flow problem has to be solved. Furthermore, we present a solution approach that combines a constraint programming formulation o...

In the early stages of development, alternative-fuel vehicles will tend to have shorter driving ranges than conventional vehicles, and the availability of stations will be limited. Given these conditions, it is important to consider the willingness of drivers to deviate to some extent from their shortest paths in order to refuel their vehicles and complete their trips. Previously, we proposed t...

Aerial refueling is an important technology of great military significance. It can effectively boost aircraft's performance owing to the longer period time and endurance range aircraft maintain in air. To solve problem that it hard for a receiver track drogue during its docking phase, trajectory prediction method based on multi-head convolutional long-short-term memory network proposed. First, ...

In this paper, we describe the Barrel Allocator, a scheduling tool developed for day-to-day allocation and management of airlift and tanker resources at the USAF Air Mobility Command (AMC). The system utilizes an incremental and con gurable constraint-based search framework to provide a range of automated and semi-automated scheduling capabilities, including generating an initial solution to th...

Technical Barriers This project addresses the following technical barriers from the Hydrogen Storage section of the Hydrogen, Fuel Cells and Infrastructure Technologies Program Multi-Year Research, Development and Demonstration Plan: • A. Cost • B. Weight and Volume • D. Durability • E. Refueling Time • M. Hydrogen Capacity and Reversibility • O. Test Protocols and Evaluation Facilities • Q. Th...

Author: Chi Xie and Nan Jiang Journal: Computer-Aided Civil and Infrastructure Engineering, Volume 31, Issue 8, pages 580–598, August 2016 Abstract: This article defines, formulates, and solves a new equilibrium traffic assignment problem with side constraints—the traffic assignment problem with relays. The relay requirement arises from the driving situation that the onboard fuel capacity of ve...

Abstract Traditional artificial gas station come on all the required 5 to 6 minutes, peak even 10 minutes or so, along with our country automobile holdings continued increase, how improve fuel efficiency become an important problem of station, according above problem, non-inductive refueling “AI” is put forward cooperate mechanical arm instead gas, this scheme can make time reduced 3 Greatly ef...

Although automobile refueling represents the major source of benzene exposure among the nonsmoking public, few data are available regarding such exposures and the associated uptake of benzene. We repeatedly measured benzene exposure and uptake (via benzene in exhaled breath) among 39 self-service customers using self-administered monitoring, a technique rarely used to obtain measurements from t...