Markets might be undermined by what Nassim Taleb, an author, has described as a “black swan”—an event with a small probability of happening, but a big impact if it does.
市场有可能被作家塔雷伯所描述的“黑天鹅”（发生几率很小，但可造成重大影响的事件）所击垮。
The small probability event has a wide range of applications in daily life.
小概率事件在日常生活中有着很广泛的应用。
The more the small probability events happen, the more the impact to text categorization results.
小概率事件发生的情况越多，对文本分类的结果影响也就越大。
Therefore, the small probability of extreme events of great value-the tail risks should call peoples' attention.
所以，对小概率大数值的极端尾部风险事件要引起人们的高度重视。
The calculation amount is huge and the convergence velocity is low, especially in the calculating of small probability events.
但是该法计算量大，收敛速度慢，尤其是对小失效概率问题。
The risk of the US slow down turning into an outright recession exists, but at this stage we would place only a small probability on such a risk.
美国经济的放缓演变成一次大萧条的可能性是存在的，但现阶段我们认为这种风险发生的可能性比较低。
Using the way, the sampling efficiency for small-probability events can be improved considerably, as can be seen from the contrasts shown in a group of results of simulation.
应用该方法可以大大提高小概率事件的抽样效率，文中给出一组仿真结果对照。
Using the way, the sampling efficiency for small-probability events can be improved considerably, as can be seen from the contrasts shown in a group of results of simulation.
应用该方法可以大大提高小概率事件的抽样效率，文中给出一组仿真结果对照。
应用推荐