论文标题
逆点问题的密度一致性方法
A Density Consistency approach to the inverse Ising problem
论文作者
论文摘要
我们提出了一种新的方法来解决逆iSing问题,该方法采用了最近引入的密度一致性近似(DC)来确定模型参数(耦合和外部场),从而最大程度地提高了给定的经验数据的可能性。该方法允许将推断参数的闭合形式表达作为第一和第二经验矩的函数。这种表达式的结构与Sessak和Monasson得出的小相关扩展相似,在低温下以及存在随机的外部磁场的情况下,它们在非零磁化情况下提供了改善。本工作提供了与最常见的推理方法进行的广泛比较,用于在几个制度中重建模型参数,即通过改变网络拓扑以及字段和耦合的分布。比较表明,没有任何方法比其他任何方法都要好,但是DC似乎是从第一和第二矩中,在重要范围的参数中,推断耦合和字段的最准确,最可靠的方法之一。
We propose a novel approach to the inverse Ising problem which employs the recently introduced Density Consistency approximation (DC) to determine the model parameters (couplings and external fields) maximizing the likelihood of given empirical data. This method allows for closed-form expressions of the inferred parameters as a function of the first and second empirical moments. Such expressions have a similar structure to the small-correlation expansion derived by Sessak and Monasson, of which they provide an improvement in the case of non-zero magnetization at low temperatures, as well as in presence of random external fields. The present work provides an extensive comparison with most common inference methods used to reconstruct the model parameters in several regimes, i.e. by varying both the network topology and the distribution of fields and couplings. The comparison shows that no method is uniformly better than every other one, but DC appears nevertheless as one of the most accurate and reliable approaches to infer couplings and fields from first and second moments in a significant range of parameters.