The confidence is at least 95% on calculating velocity ratio when considering station factor.
考虑台站因素，计算波速比的置信度最低达到95%。
In the meantime, fracture developing frequency of Fuyu oil pay zone is analyzed and calculated by using ratio of vertical wave velocity - "crocodile factor" method.
同时，运用纵波波速的比值——“龟裂系数”方法对扶余油层储层的裂缝发育频率进行了分析、计算。
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