Results 81 to 90 of about 5,343,110 (254)

Heuristic branch-and-price for building long term trainee schedules. [PDF]

Branch-and-price is an increasingly important technique for solving large integer programming models. Staff scheduling has been a particularly fruitful area since these problems typically exhibit a decomposable structure.
Belien, Jeroen, Demeulemeester, Erik
core  

A variable neighborhood-based heuristic for the heterogeneous fleet vehicle routing problem [PDF]

, 2008
The heterogeneous fleet vehicle routing problem is investigated using some adaptations of the variable neighborhood search (VNS). The initial solution is obtained by Dijkstra's algorithm based on a cost network constructed by the sweep algorithm and the ...
Imran, Arif, Wassan, Niaz A., Salhi, Said   +2 more
core   +1 more source

A hybrid algorithm for coalition structure generation

, 2012
The current state-of-the-art algorithm for optimal coalition structure generation is IDP-IP—an algorithm that combines IDP (a dynamic programming algorithm due to Rahwan and Jennings, 2008b) with IP (a tree-search algorithm due to Rahwan et al., 2009 ...
Nicholas R. Jennings, Rahwan, Talal, Jennings, Nicholas R., Talal Rahwan, Michalak, Tomasz, Tomasz Michalak   +5 more
core   +1 more source

Solving the line planning problem with service-levels using a column generation-based heuristic algorithm

EURO Journal on Transportation and Logistics
This research investigates the strategic design of bus line networks by incorporating the operational objectives and constraints relevant to network operators.
Hector Gatt, Jean-Marie Freche, Fabien Lehuédé, Thomas G. Yeung   +3 more
doaj   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source

Ontology‐Aligned Structuring and Reuse of Multimodal Materials Data and Workflows Toward Automatic Reproduction

Advanced Engineering Materials, EarlyView.
Reproduction of stacking fault energy calculations from literature with a semi‐automated large language model‐assisted extraction procedure: extraction of simulation protocol, atomistic structures, computational parameters, and reported results, ontology alignment, knowledge graph construction and, finally, recomputation forvalidation.
Sepideh Baghaee Ravari, Abril Azocar Guzman, Sarath Menon, Stefan Sandfeld, Tilmann Hickel, Markus Stricker   +5 more
wiley   +1 more source

Column Generation for the Split Delivery VRP [PDF]

In this paper we tackle a variation of the Vehicle Routing Problem (VRP) in which each customer can be served by more than one vehicle, each serving a fraction of its demand. This problem is known as the Split Delivery VRP (SDVRP).
Salani, Matteo, Ceselli, Alberto
core   +1 more source

Bi-Level Hybrid Stochastic/Robust Optimization for Low-Carbon Virtual Power Plant Dispatch

CSEE Journal of Power and Energy Systems
Rapid development of power-to-gas technology provides a potential solution for virtual power plants (VPP) to achieve near-zero carbon emissions. In this paper, a bi-level hybrid stochastic/robust optimization model is proposed for low-carbon VPP day ...
Xuan Wei, Yinliang Xu, Hongbin Sun, Haotian Zhao   +3 more
doaj   +1 more source

Data-Adaptive Robust Transmission Network Planning Incorporating Post-Contingency Demand Response

IEEE Access, 2019
The significant development and increasing deployment of renewable generation in the modern power system introduces the challenge for dealing with uncertainty.
Qianwei Zheng, Xiaomeng Ai, Jiakun Fang, Jinyu Wen   +3 more
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source