差事件

经济衰退则表现为高波动性、高不确定性以及高离差事件。

Recessions are high-volatility , high-uncertainty and high-dispersion events .

只要复制一下它的风险模型便可发现，它是在一个9个标准差事件（概率极低，以至于基本不会发生）中损失了一半多资本的。

One attempt to reproduce its risk metrics suggests that it lost more than half its capital from a nine sigma event – a probability so low that such events simply do not happen .

当前的RFID中间件产品事件处理方面普遍存在着事件处理能力差、事件处理规则简单和事件处理实时性差等问题，这些问题在很大程度上制约了RFID技术的发展速度。

There are several problems in event handling for RFID middleware products currently . For example , event handling abilities are bad , event processing rules are simple and event handling real-time is poor . These problems largely restricted the pace of development of RFID technology .

对称差在事件运算中的应用

Symmetric Difference Applying in the Operation of Events

假如你在100万年的时间里每天都按市值计算自己的头寸，遇到一次标准差为25的事件的几率仍不到一百万分之一。

If you marked your position to market every day for a million years , there would still be a less than one in a million chance of experiencing a 25-standard deviation event .