Ant colony algorithm is a new heuristic optimization method and it has many merits.

蚁群算法是一种新型启发式优化算法，具有较多优点。

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The method gives out the presentation be constrained to objects into pipeline by using collision matrix, and findsout scheduling model with goal-oriented optimization by heuristic search.

该方法给出冲突矩阵表示对象流入流水线的限制，通过启发式搜索寻找面向目标优化的调度策略。

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Second, combining with the result of first step, it carries out branch exchange by using heuristic rule to reduce the defect due to using a method independently and improve the optimization effect.

结合第一步的计算结果，第二步运用启发式规则进行支路交换，从而减少单独运用一种方法的不足，提高优化效果。

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