A logarithm mathematical model is used to analyze 702 CVN impact test data and by means of regression, a general equation is obtained for bridge steel and welding seams.
对702个CVN冲击试验数据应用对数数学分析模型进行回归，得到桥梁钢和焊缝的通用计算表达式。
2
The standard logarithm visual acuity chart is applicable to general physical examination, enrollment and recruitment and it can also be referred to in clinical research.