This paper presents the field estimation on rock mass quality by means of vibrational decrement. 本文介绍了一种在现场用振动衰减系数来估计岩体质量的新方法。
The analysis of seed quality showed plumpness, mass per thousand, germination capacity, vigor of germination and vital index, similar to the above-mentioned indices, also presented decrement trend with the delay of sowing time. 通过对鸭儿芹在不同播种期所采收的种子进行质量检验,结果表明:随着播种期的延迟,种子的饱满度、千粒重、发芽势、发芽率以及活力指数均有下降的趋势。