三角分布 meaning in English

triangle distribution

The achievements achieved in the study are presented as follows : ( l ) to the distribution of construction duration of the pert network , even though every activity duration obeys normal distribution , it is failed to be proved to be in the obedience with normal distribution strictly . however , if there - are a lot of activities in a path of the pert network , for instance , more than 20 activities , without reference to the normal distributions - distribution or triangle distribution which activities duration obeys , the construction duration approximately obeys the normal distribution when the form of distribution is not partiality seriously
通过本文的研究取得的新成果有： ( 1 )对pert网络施工工期的分布，即使每一活动持续时间服从正态分布，也不能证明其严格服从正态分布，但当pert网络线路上的活动较多时，如超过20项，不论活动持续时间服从正态分布、分布，还是三角分布，当偏态不十分明显时，则工期近似服从正态分布。