中文摘要：

为进一步揭示DNA凝聚物理机制,基于凝聚反离子强关联性质,本文建立DNA分子凝聚强关联模型并利用Monte Carlo模拟方法研究DNA分子凝聚的相关性质。凝聚过程中,凝聚构象回转半径出现＂台阶式＂变化,DNA凝聚过程呈现不连续性;片段自相关定量用来表征DNA凝聚构象中成环数目。凝聚相图表明,DNA凝聚构象大多数为复杂花样结构,凝聚成环的概率较小。凝聚反离子强关联模型较好地揭示了DNA凝聚机制。

英文摘要：

In order to identify the mechanism of DNA condensation further,a strong correlation model is established based on the strong correlation of condensed counterios and Monte Carlo simulation is employed to study the properties of DNA condensation.During the condensation process,gyration radii of condensed conformation appear step-wise manner indicating the discontinuousness of process of DNA condensation.Autocorrelation of the segment reflects the number of loop structure in the condensed conformation,the condensed phase diagram shows the complexity of the condensed conformation,the majority of condensed conformations take on the complex flower structure,and in comparison with flower structure,the occurrence rate of the toroidal structure is small.All the results mentioned above show strong highlight into the mechanism of DNA condensation.