论文基于“煤结构决定煤的性质”这一学术思想，在研究煤的结构和演化特征的基础上，从煤的微观结构来研究煤的瓦斯吸附、放散特性。
Based on the academic thought that "coal structure decides the nature of coal", which is from the microstructure of coal to study the gas adsorption, emission characteristics.
本文讨论了材料退化失效的基本概念，给出了微观结构随机演化的动力学方程，统一导出了失效几率，可靠性、失效几率密度、失效率和平均寿命。
Some key concepts in degradated failure of materials is discussed. The stochastic evolution equation of defect clusters is given and the failure probability reliability and failure rate are derived.
焊接热影响区微观结构演化与诸多因素密切相关，是一个复杂的过程。
The microstructure evolution in HAZ of Welds is a complex procedure, which associates with many factors.
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