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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This course offers an introduction to the history, theory, and construction of basic structural systems as well as an introduction to energy issues in buildings.

本课程介绍了基本结构体系的历史、理论和构造，还有建筑物的能源问题。

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