Abstract
Introduction: When Ant Colony Optimization algorithm (ACO) is adept at identifying
the shortest path, the temporary solution is uncertain during the iterative process. All temporary
solutions form a solution set.
Methods: Where each solution is random. That is, the solution set has entropy. When the solution
tends to be stable, the entropy also converges to a fixed value. Therefore, it was proposed in this
paper that apply entropy as a convergence criterion of ACO. The advantage of the proposed criterion
is that it approximates the optimal convergence time of the algorithm.
Results: In order to prove the superiority of the entropy convergence criterion, it was used to cluster
gene chip data, which were sampled from patients of Alzheimer’s Disease (AD). The clustering
algorithm is compared with six typical clustering algorithms. The comparison shows that the
ACO using entropy as a convergence criterion is of good quality.
Conclusion: At the same time, applying the presented algorithm, we analyzed the clustering characteristics
of genes related to energy metabolism and found that as AD occurs, the entropy of the
energy metabolism system decreases; that is, the system disorder decreases significantly.
Keywords:
Ant colony algorithms, entropy, Alzheimer’s disease, gene chip data analysis, entropy convergence criterion, energy metabolism system.
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