选择呼叫设备的“呼叫概率”和“虚呼概率”是反映其性能的综合指标。不仅生产选择呼叫设备时十分重视这些指标,而且它们是直接关系用户使用要求的指标。因此搞清楚呼叫概率和虚呼概率的含义及评价方法是十分必要的。一、呼叫概率的一般概念呼叫概率是随机变量的统计值。它定义为期望成功的选择呼叫次数与总试验次数之比。所谓“期望成 The “call probability” and “virtual call probability” of the selective calling device are comprehensive indicators reflecting their performance. Not only do these metrics stand out when producing select-call devices, but they are indicators that directly relate to user requirements. Therefore, it is necessary to clarify the meaning and evaluation method of call probability and virtual call probability. First, the general concept of call probability Call probability is the statistical value of random variables. It is defined as the ratio of the number of selective calls expected to be successful to the total number of trials. The so-called "expectations into