By using the mean-field approximation method, the critical behavior of the mixed-spin XXZ model with DM interaction on the cubic lattice is studied.

利用平均场近似的方法，研究了立方晶格上具有DM相互作用的混合XXZ模型的相变和临界性质。

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In the first chapter, we shall give a simple introduction to the mean-field theory and its history, research status and applications of chaos in BEC.

第一章简单介绍了平均场理论以及玻色-爱因斯坦凝聚领域中有关混沌的研究历史，现状和应用。

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Besides, the applicability of Relativistic mean field theory in this region was tested.

同时，也检验了相对论平均场理论在该区域的适用性。

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I mean as an undergraduate, I majored in a field -Harvard still has it-- called History and Literature.

我在本科时，专业是,历史和文学，哈佛还有这个专业。

普林斯顿公开课 - 人性课程节选

He also argues that avoiding all development on risky areas would mean forgoing some of the brown-field land which the government is keen to use: Mr Prescott wants 60% of new homes built on brown-field sites.

ECONOMIST: A hard rain

Projected boosts in infrastructure-related construction mean there is a bright future in this field, with the BLS predicting 19% job growth from 2010 to 2020.

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Record-breaking world oil prices mean prospects are bright for Halliburton's oil field services business, which had profit margins of 14.2% in the three months to June 2004, up 1% on year-earlier.

BBC: NEWS | Business | Halliburton hopes for better days