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math.OC2025
On the Convexification of a Class of Mixed-Integer Conic Sets
Guxin Du, Rui Chen, Linchuan Wei
We investigate mixed-integer second-order conic (SOC) sets with a nonlinear right-hand side in the SOC constraint, a structure frequently arising in mixed-integer quadratically con…
math.OC2025
Learning Large Neighborhood Search for Maritime Inventory Routing Optimization
Rui Chen, Defeng Liu, Nan Jiang +3
Maritime inventory routing optimization is an important yet challenging combinatorial optimization problem. We propose a machine learning-based local search approach for finding fe…
math.OC2025
Efficient Branching Rules for Optimizing Range and Order-Based Objective Functions
Bart van Rossum, Rui Chen, Andrea Lodi
We consider range minimization problems featuring exponentially many variables, as frequently arising in fairness-oriented or bi-objective optimization. While branch and price is s…