The research background of the article, the content of study, the technique means of study.

本文的研究背景、国内外研究的现状、本文研究的内容和意义，以及技术路线。

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The content of study comprise the theory of image model, morphology filter , background correlation and so on.

研究内容包括图像模型理论、形态滤波和背景相关特性等相关内容。

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The first part is about the problem, the significance of research, the relevant concepts, research targets, and the content of study, the basic ways and research methods.

第一部分阐述了问题提出、研究意义、相关概念、研究综述、研究目标、研究内容、研究的基本思路与方法。

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Lehmann, the lead author of the paper which is published in the journal Nature Geosciences, said that the black carbon content of soils in the study ranged from zero to 82 percent of soil organic carbon.

CNN: Soil study hints at climate model revision

The authors of the study warned of the high sugar and fat content of chocolate.

BBC: Chocolate may protect the brain from stroke

Commissioned as part of the UNESCO-USA-Brazil project Teaching Respect for All and carried out in cooperation with the Centre of Human Rights Education, Lucerne, Switzerland, the study also makes recommendations in terms of content, methodology, usability and process for the future development of education materials against racism, discrimination and intolerance.

UNESCO: EDUCATION