This paper advances that the unknow error in deterministic function and the random error which don't cause randomly fluctuation of measuring data can deal with uncertainty of B class.
文中提出未定的确定函数误差与未引起测量数据作随机变动的随机误差宜作为B类不确定度处理。
The deterministic method, which USES the safety factor decided by experience to describe the effects of random uncertainty on the structure, doesn't solve the random problem.
传统的结构设计和强度校核，是建立在确定性方法的基础上，只是利用经验确定的安全系数来描述各种随机不确定性对结构性能的影响。
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