Extinction probabilities for the single birth chain in Marko-vian environment with an absorption barrier 0 and a reflection barrier m.

求出了0为吸收壁，M为反射壁的马氏环境中单生链的灭绝概率。

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Extinction probabilities for the homogeneous birth and death chain in Markovian environment with an absorption barrier 0 and a reflection barrier m.

求出了0为吸收壁，M为反射壁的马氏环境中齐次生灭链的灭绝概率。

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This paper analysis the acoustic principles of noise barriers, discuss the transmission, reflection and diffraction of the noise barrier, and the influencing factors of the three transmission routes.

本文从分析声屏障的声学原理入手，探讨声屏障的透射、反射和绕射机理以及对这三种传播途径的影响因素。

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This paper analysis the acoustic principles of noise barriers, discuss the transmission, reflection and diffraction of the noise barrier, and the influencing factors of the three transmission routes.

本文从分析声屏障的声学原理入手，探讨声屏障的透射、反射和绕射机理以及对这三种传播途径的影响因素。

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