Current research on wood quality evaluation in standing trees is still limited in China. The mechanism of stress wave propagation in trees is not fully understood yet and the interpretation of stress wave measures is largely through empirical relationships.
本文以评价人工林活立木力学性质为目的,为应力波在立木中传播机理提供基础研究。
参考来源 - 应力波在活立木中传播波形的构建与研究·2,447,543篇论文数据，部分数据来源于NoteExpress
第一节研究低压下热薄固体燃料表面的火焰传播机理。
In the first section, we have done the experiments of flame spread across solid thermal thin fuels in the low ambient pressures.
传播机理；
在此基础上，对科技传播机理进行了分析，为后面科技传播障碍研究作了理论上的准备。
And this is the preparation of further study on obstacles of scientific and technical commutation.
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