This paper examines the information sources and information content of analyst forecast revision, as well as whether investors could use this information efficiently.

文章研究了证券分析师盈利预测修正的信息源和信息含量以及市场对盈利预测修正所含信息的吸收效率。

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It is a very important content of disaster prevention and reduction to describe and forecast the distribution of urban rainfall (rainstorm).

如何准确描述和预测降雨(暴雨)的空间分布，已成为城市减灾防灾的重要内容。

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Because the BP neural network may realize the free linearity or the non-linear function mapping, it may satisfy the request of the forecast for the endpoint oxygen content.

由于BP神经网络可以实现任意线性或非线性的函数映射，所以可以满足终点氧含量的预报要求。

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