中文摘要：

本文讨论了伊辛模型在具有两个模块的网络上的成核相变。对每个模块施加不同的外场强度,在保证平均外场不变的前提下研究外场差异对成核速率的影响。通过平均场理论计算和伞形采样模拟,发现存在一个最优的外场差异对应成核速率最大。

英文摘要：

This paper discusses the nucleation in a first-order phase transition on a network with two modules.By applying two distinct external fields to each module , the effect of the diversity in external fields on nucleation rate is investigated under the constraint that the average external field is unchanged.By mean-field theory and umbrella sampling, we find that there exists an optimal diversity for which the nucleation rate is maximal .