Results 61 to 70 of about 5,343,110 (254)
Combining Column Generation and Lagrangian Relaxation [PDF]
Although the possibility to combine column generation and Lagrangian relaxation has been known for quite some time, it has only recently been exploited in algorithms. In this paper, we discuss ways of combining these techniques.
Jans, R.F. +3 more
core
Journal of Advanced Transportation, 2018 A Synchronous Optimization for Multiship Shuttle Tanker Fleet Design and Scheduling is solved in the context of development of floating production storage and offloading device (FPSO).
Zhenfeng Jiang +2 more
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Hereditary Spastic Paraplegia (HSP) comprises a group of rare genetic diseases characterized by length‐dependent axonal degeneration of the corticospinal tracts and dorsal columns, whose main clinical feature is spastic gait. Pathogenic variants in the SPG4 gene cause Spastic Paraplegia Type 4 (SPG4‐HSP), the most common form of HSP.
Gaia Fattorini +12 more
wiley +1 more source
Column generation approaches to ship scheduling with flexible cargo sizes [PDF]
We present a Dantzig-Wolfe procedure for the ship scheduling problem with flexible cargo sizes. This problem is similar to the well-known pickup and delivery problem with time windows, but the cargo sizes are defined by an interval instead of a fixed ...
Nygreen, Bjørn +2 more
core
Asynchronous Column Generation
, 2017 In this paper we face a very fundamental problem in Operations Research: to find good dual bounds to generic mixed integer mathematical programs (MIPs) as quickly as possible.
S. Basso, A. Ceselli
core +1 more source
Data‐Driven SuStaIn Model of Disability Progression in Amyotrophic Lateral Sclerosis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To determine whether ordinal Subtype and Stage Inference (SuStaIn) applied to routine ALSFRS‐R item scores can identify reproducible disability progression patterns in amyotrophic lateral sclerosis (ALS) and provide clinically meaningful staging.
Giammarco Milella +5 more
wiley +1 more source
On the trade-off between staff-decomposed and activity-decomposed column generation for a staff scheduling problem. [PDF]
In this paper a comparison is made between two decomposition techniques to solve a staff scheduling problem with column generation. In the first approach, decomposition takes place on the staff members, whereas in the second approach decomposition takes ...
Belien, Jeroen, Demeulemeester, Erik
core
Acceleration of Lagrangian Method for the Vehicle Routing Problem with Time Windows
International Journal of Industrial Engineering and Production Research, 2012 The analytic center cutting plane method (ACCPM) is one of successful methods to solve nondifferentiable optimization problems. In this paper ACCPM is used for the first time in the vehicle routing problem with time windows (VRPTW) to accelerate ...
Hadi Karimi, Abbas Seifi
doaj
Systemic Extracerebral Atherosclerotic Burden and Dementia Risk After Incident Stroke
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Stroke survivors are at increased risk of dementia, but clinically accessible markers of risk heterogeneity remain limited. Previous studies have largely examined atherosclerotic disease in individual vascular beds rather than the overall burden of systemic extracerebral atherosclerosis.
Zhexuan Yu +4 more
wiley +1 more source
A column generation approach to solve the crew re-scheduling problem [PDF]
When tracks are out of service for maintenance during a certainperiod, trains cannot be operated on those tracks. This leads to amodified timetable, and results in infeasible rolling stock andcrew schedules. Therefore, these schedules need to be repaired.
Huisman, D.
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