研究了半马氏过程的一维分布，构造及积分型随机泛函。

We study the one-dimensional distribution, integral type random functional and construction of the semi Markov processes.

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研究表明，低伽马泥岩是在湖泛时期由于富含放射性的钾长石和云母等矿物受到抑制而沉积形成的。

The results show that the low gamma shale were deposited in the lake-flooding stage which inhibited the deposition of minerals with high radioactivity such ask-feldspar and mica.

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