Studies have shown that the surrogate subgradient method, to optimize non-smooth dual
functions within the Lagrangian relaxation framework, can lead to significant computational …

We study the operational problem of a make-to-order contract manufacturer seeking to
integrate production scheduling and transportation planning for improved performance …

This paper investigates a hybrid flowshop scheduling (HFS) problem in the steelmaking
continuous casting (SCC) process. Firstly, a mathematical model is built for the SCC …

A carrier collaboration problem with pickup and delivery requests is considered, in which
multiple carriers form an alliance to share their pickup and delivery requests and vehicle …

We study a two-stage hybrid flow shop problem arising from a fine chemicals production
facility, where the first stage is a continuous chemical reaction process and the second stage …

Collaborative transportation is achieved when multiple carriers or shippers form a
partnership to optimise their transportation operations by sharing vehicle capacities and …

This paper studies how to generalize Lagrangian relaxation to high-level optimization
models, including constraint-programming and local search models. It exploits the concepts …

This paper is concerned with the qualification management problem of parallel machines
under high uncertainties in the semiconductor manufacturing industry. Product–machine …

This study concerns the problem of controlling multiclass (elastic, inelastic and
unresponsive) Internet traffic without sacrificing quality of service (QoS) by adopting a unified …

The Polyak stepsize formula has been widely used for subgradient methods for convex
optimization. However, calculating the stepsize requires the optimal objective value, which is …