For an image sequence, background frame is first generated using the medium pixel values as background values;

对于一个序列，首先用像素点的中间值作为背景的像素值，生成背景帧；

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In the UI thread, populate your tree or table with placeholder values and, in a background Job, retrieve the real values and update the tree as you fetch them.

在UI线程里，用占位符填充树或表，在后台的Job中，检索真实数据并在获得数据后更新树。

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With Zhenezhou area as an example, this paper discusses the application of geochemical exploration to the study of environmental background values and environmental evaluation.

本文以郑州地区为例，讨论了冲积平原区用地球化学勘查方法进行环境背景值和环境评价方面的研究。

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