potentially polluting activity

Recoguizing the Importance of ADR Monitoring of Drugs Available on the Market From PPA Event;

从PPA事件认识上市药品不良反应监测的重要性

Applying the constructing rules for operators of probability type derived from power series (for short, PPA operators), a new PPA operator has been constructed.

根据幂级数导生的概率型算子 (即PPA算子 )的构造规律 ,利用导源函数S(x)和扩充因子λ(x)的不同配对方法 ,构造出一种新的PPA算子 ,系统给出它的收敛性、逼近度量化估计、渐近公式及饱和性质 ,并给出它较一般的推广形式 。