Struct vrp_core::solver::search::AdjustedStringRemoval

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pub struct AdjustedStringRemoval { /* private fields */ }
Expand description

Adjusted string removal ruin strategy based on “Slack Induction by String Removals for Vehicle Routing Problems” by Jan Christiaens, Greet Vanden Berghe.

Some definitions from the paper:

  • string is a sequence of consecutive nodes in a tour.
  • cardinality is the number of customers included in a string or tour.

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impl AdjustedStringRemoval

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pub fn new(lmax: usize, cavg: usize, alpha: f64, limits: RemovalLimits) -> Self

Creates a new instance of AdjustedStringRemoval.

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pub fn new_with_defaults(limits: RemovalLimits) -> Self

Creates a new instance of AdjustedStringRemoval with some defaults.

Trait Implementations§

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impl Ruin for AdjustedStringRemoval

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fn run( &self, _: &RefinementContext, insertion_ctx: InsertionContext ) -> InsertionContext

Ruins given solution and returns a new one with less jobs assigned.

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