通过对最佳状态的稳定性分析，论述了该系统存在倍增周期现象和混沌现象的可能性。
They also analysed the model's period-doubling phenomena and existence of chaotic character, and studied model's optimal control problems.
目的研究不同剂量X射线照射对EL4淋巴瘤细胞周期进程及细胞倍增时间的影响。
In the present study, the effect of X rays on el 4 cell doubling time and cell cycle progression were investigated.
耶鲁大学的组织工程师劳拉·尼克拉森周期性的压力有助于培育中的动脉形成纤维，并使其成倍增强。
The rhythmic stress helps align the fibres of the developing artery, making them twice as strong, says Laura Niklason, a tissue engineer at Yale University.
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