In this paper, the mathematical foundation study of rough sets and the study of two general rough sets models are mainly researched.

本文主要进行了粗糙集的数学基础研究，与程度粗糙集和变精度粗糙集两个广义粗糙集模型的探讨。

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Nearly a decade later, in 2013, the Education Endowment Foundation funded a bigger study with more than 900 students.

在大约十年后的2013年，教育捐赠基金会资助了一项规模更大的研究，有900多名学生参加。

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This study was supported by the John Templeton Foundation, the National Science Foundation, the National Institutes of Health and J. Epstein.

这项研究得到了约翰·坦普尔顿基金会、美国国家科学基金会、美国国立卫生研究院和 J·爱泼斯坦的支持。

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The foundation also started centers for the study of medical ethics at Harvard University and Georgetown University.

VOA: special.2009.08.23

Marie-Noel Vercambre of the Foundation for Public Health in Paris led the study.

VOA: special.2011.07.27

Americas National Science Foundation paid for the study.

VOA: special.2010.03.02

In fact, a Kauffman Foundation study on business and gender shows women are outperformed by men in many areas of business.

FORBES: Connect

In fact, a recent Kauffman Foundation study found that immigrants were unique in boosting their entrepreneurial activities since the onset of the recession.

FORBES: The Best Cities For Minority Entrepreneurs

Gintaras's experience is echoed by a Joseph Rowntree Foundation study into East European immigration and community cohesion, based around interviews with migrants in Brighton and Hove and the London boroughs of Hackney and Harrow.

BBC: Migrants' road to UK integration