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。
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。
The effective barrier to indoor storm hit, with wind rain, due to the reflection of the airflow, even if the air conditioning is not turn off the screen, can be a free exchange of fresh air.
有效阻隔风雨对室内的侵袭，具有防风挡雨的功能，由于气流的反射作用，即使开空调也不用关闭纱窗，可自由交换新鲜空气。
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。
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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