| บทคัดย่อ |
This paper presents the Hybrid Particle Swarm Optimization and Neighborhood Strategy Search (HPSO-NS) to
solve a tractor scheduling and routing problem with equipment allocation constraint in sugarcane field preparation,
to help the growers catch the season and ensure advantageous production of sugar from sugarcane.
This problem can be formulated as the flexible flow shop scheduling problem with machine eligibility, time
windows, sequence dependent setup time (SDST), blocking, machine restriction and machine grouping (FFS
|Ssmt ,Mj, Grouping, block, 6-stage, Tool, Tw |). A mixed-integer programming model was developed to solve smallscale
problems. The HPSO-NS was developed for large-scale problems, and three neighborhood strategies were
added to the PSO procedure and developed. Moreover, two new formulae which were used to select the
neighborhood strategy in HPSO-NS are presented in this paper to increase the performance of the proposed
method. The computational results show that the HPSO-NS outperforms the original PSO and the lower bound
obtained from the optimization software, while using 97% less computational time. |
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