Results 1 to 10 of about 44,963 (303)

Branch and price for submodular bin packing

open access: yesEURO Journal on Computational Optimization, 2023
The Submodular Bin Packing (SMBP) problem asks for packing unsplittable items into a minimal number of bins for which the capacity utilization function is submodular.
Liding Xu   +3 more
doaj   +5 more sources

Temporal Trend and Fluctuation Learning via Enhanced Attention Mamba for Carbon Price Interval Forecasting [PDF]

open access: yesEntropy
Accurate carbon price forecasting is essential for transforming complex carbon trading markets into efficiently managed and stably operating systems. Existing long-term time series forecasting methods struggle to capture the nonlinear and non-stationary ...
Lijun Duan   +5 more
doaj   +2 more sources

A Branch-and-Price Algorithm for the Online Scheduling of Valet Drivers

open access: yesAlgorithms, 2023
In the present paper, the online valet driving problem (OVDP) is studied. In this problem, customers request a valet driving service through the platform, then the valets arrive on e-bikes at the designated pickup location and drive the vehicle to the ...
Lei Zhang, Zhi Pei
doaj   +1 more source

A Novel Energy Efficient Multi-Dimensional Virtual Machines Allocation and Migration at the Cloud Data Center

open access: yesIEEE Access, 2023
Due to the rapid utilization of cloud services, the energy consumption of cloud data centres is increasing dramatically. These cloud services are provided by Virtual Machines (VMs) through the cloud data center. Therefore, energy-aware VMs allocation and
Neeraj Kumar Sharma   +5 more
doaj   +1 more source

Close-Enough Facility Location

open access: yesMathematics, 2021
This paper introduces the concept of close-enough in the context of facility location. It is assumed that customers are willing to move from their homes to close-enough pickup locations.
Alejandro Moya-Martínez   +2 more
doaj   +1 more source

Solving Linear Integer Models with Variable Bounding

open access: yesForecasting, 2023
We present a technique to solve the linear integer model with variable bounding. By using the continuous optimal solution of the linear integer model, the variable bounds for the basic variables are approximated and then used to calculate the optimal ...
Elias Munapo   +2 more
doaj   +1 more source

A political argument for inefficiency under severe political pressure

open access: yesJournal of Government and Economics, 2023
Who watches the watchmen? In order to examine the role of the governance separation of powers principle in economics, we developed a theoretical model of a structurally failed market with and without political pressure.
Doron Nisani
doaj   +1 more source

Assigning lifetime occupation domains for older Mexicans: MHAS-O*NET linkage protocol

open access: yesSalud Pública de México, 2023
Objective. We developed a MHAS (Mexican Health and Aging Study) and O*NET (Occupational Information Network) linkage to allow global researchers using MHAS data to assign lifetime occupation domains for older Mexicans. Materials and methods.
Chih-Ying Li   +6 more
doaj   +1 more source

A Three-Stage Optimization Method for Assembly Line Balancing Problem

open access: yesIEEE Access, 2020
Considering the characteristics of multimodels production pattern on assembly line, the assembly line balancing problem which is non-deterministic polynomial hard becomes more challenging to complete. In this article, we propose a reformulation of simple
Qidong Yin, Xiaochuan Luo
doaj   +1 more source

A branch-and-price algorithm for the robust single-source capacitated facility location problem under demand uncertainty

open access: yesEURO Journal on Transportation and Logistics, 2022
We consider the robust single-source capacitated facility location problem with uncertainty in customer demands. A cardinality-constrained uncertainty set is assumed for the robust problem.
Jaehyeon Ryu, Sungsoo Park
doaj   +1 more source

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