Then expatiate the geometry structure parameter and the ponderance of modification wrap.

阐述了双头涡旋型线几何结构参数及其修正的必要性。

Result: Uncertainty in each ponderance were analyzed and put forward combined standard uncertainty resides of the method.

结果：量化各不确定度分量，提出了该法的合成不确定度评估结果；

Risks of assembly occupancies have source complicacy, intrinsical dualism, effect ponderance, limited calculability and spatiotemporal characteristics.

人员密集场所的风险具有来源的复杂性、本质的双重性、后果的严重性、有限可计算性和时空特性。