cluster random sampling 整群随机抽样
cluster sample 整群样本
overall approximation 整体逼近法
所以个人猜想大概是整群逼近的意思
至于n-cluster method,实在是不好查,查出来的都有点莫名其妙
这是查出来最接近的一段东东
The results of mean-field theory can be improved systematically by the so-called
n-cluster approximation. The n-cluster method takes into account correlations
between neighbouring sites and reduces to mean-field theory for n = 1. In order
to get a closed set of equations one uses conditional probabilities for the overlap
of neighbouring clusters.
你是从哪里看到的?可否贴出原文?
http://www.physics.uc.edu/~jarrell/vit/node13.html
http://www.physics.uc.edu/~jarrell/vit/node14.html
大体介绍The Dynamical Mean Field Approximation和Dynamical Cluster Approximationd 的文章,概念性的东西有一点
http://cnls.lanl.gov/People/ebn/pubs/contact/contact.pdf
讲的是Cluster Approximation for the Contact Process
3. 更加漫无边际的资料
http://arxiv.org/PS_cache/cond-mat/pdf/0304/0304453.pdf
Mean-field solution of the parity-conserving kinetic phase transition in one dimension,大概与问题有点联系吧