Using the ECMWF ensemble forecasting system as an example, a deterministic forecast case and a probability forecast case are discussed, respectively.

以欧洲中期天气预报中心的集合预报系统的控制预报和集合预报为例，对确定性预报和概率预报的情况分别进行了说明。

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Sepa - ration of the two probability distribution functions allows the use of the three-month running mean of ULTA as a criterion for forecasting El Nino.

国家环保总局-定量的概率分布函数的两个可以使用其中的三个月平均UL TA运行为准则预测厄尔尼诺现象。

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A double forecasting model is proposed by using conditional mathematical expectation, based on probability distribution of port cargo throughput.

在得出港口货物吞吐量概率分布的基础上，利用条件数学期望提出了港口货物吞吐量的双层预测模型。

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