Large neighborhood search - LNS
14 important questions on Large neighborhood search - LNS
What is the idea behind LNS (Large Neighborhood Search)?
What is a destroy heuristic?
What is a repair heuristic?
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If the number of variables removed from the current solution is too small what are [2] consequences?
- Less diversification;
- Effect Large neighbourhood is lost;
If the number of variables removed from the current solution is too large what are [3] consequences?
- Less intensification;
- Random re-optimization with poor solution qualities;
- Time consuming;
What are possible destroy strategies considering the degree of destruction in LNS?
- Constant degree;
- Random degree;
- Increasing degree;
- Decreasing degree;
- Increasing and decreasing degree;
Explain the destroy strategy, degree of destruction: increasing degree.
Explain the destroy strategy, degree of destruction: decreasing degree.
What are [4] examples in destroy strategy, destroy heuristic?
- Random removal;
- Worst removal;
- Shaw-removal;
- History-based removal;
In destroy strategy, destroy heuristics what is the history-based removal?
In insert strategy, repair heuristics what is meant with the greedy repair?
Give [6] possible acceptance strategies considering LNS
- SA;
- Tabu search;
- Local search';
- Random accept;
- Treshold accept;
- Level accept;
In acceptance strategies in LNS, explain level accept;
Explain the destroy strategy, degree of destruction: increase and decrease degree.
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