2 citations · 5 across the 10 of their papers we have counts for
10 papers
A New Class of Compact Formulations for Vehicle Routing Problems
Udayan Mandal, Amelia Regan, Louis Martin Rousseau +1
This paper introduces a novel compact mixed integer linear programming (MILP) formulation and a discretization discovery-based solution approach for the Vehicle Routing Problem wit…
Graph Master and Local Area Routes for Efficient Column Generation for the Capacitated Vehicle Routing Problem with Time Windows
Udayan Mandal, Amelia Regan, Louis Martin Rousseau +1
In this research we consider the problem of accelerating the convergence of column generation (CG) for the weighted set cover formulation of the capacitated vehicle routing problem…
Local Area Routes and Valid Inequalities for Efficient Vehicle Routing
Udayan Mandal, Amelia Regan, Julian Yarkony
In this research we introduce Local Area (LA) routes for improving the efficiency and tightness of column generation (CG) methods for solving vehicle routing problems (VRP). LA-rou…
Local Area Routes for Vehicle Routing Problems
Udayan Mandal, Amelia Regan, Julian Yarkony
We consider an approach for improving the efficiency of column generation (CG) methods for solving vehicle routing problems. We introduce Local Area (LA) route relaxations, an alte…
Principled Graph Management
Julian Yarkony, Amelia Regan
Graph Generation is a recently introduced enhanced Column Generation algorithm for solving expanded Linear Programming relaxations of mixed integer linear programs without weakenin…
Graph Generation: A New Approach to Solving Expanded Linear Programming Relaxations
Julian Yarkony, Naveed Haghani, Amelia Regan
In this article we introduce Graph Generation, an enhanced Column Generation (CG) algorithm for solving expanded linear programming relaxations of mixed integer linear programs. To…
Detour Dual Optimal Inequalities for Column Generation with Application to Routing and Location
Julian Yarkony, Naveed Haghani, Amelia Regan
We consider the problem of accelerating column generation (CG) for logistics optimization problems using vehicle routing as an example. Without loss of generality, we focus on the…
Clustering of Time Series Data with Prior Geographical Information
Reza Asadi, Amelia Regan
Time Series data are broadly studied in various domains of transportation systems. Traffic data area challenging example of spatio-temporal data, as it is multi-variate time series…
Family Column Generation: A Principled Stabilized Column Generation Approach
Naveen Haghani, Julian Yarkony, Amelia Regan
We tackle the problem of accelerating column generation (CG) approaches to set cover formulations in operations research. At each iteration of CG we generate a dual solution that a…
Multi-Robot Routing with Time Windows: A Column Generation Approach
Naveed Haghani, Jiaoyang Li, Sven Koenig +4
Robots performing tasks in warehouses provide the first example of wide-spread adoption of autonomous vehicles in transportation and logistics. The efficiency of these operations,…