In the paper, a BP network in which the factors to effect groundwater levels are set as input neurons and the groundwater level is set as output neuron, was established to forecast groundwater level.
本文把影响地下水位的因素集作为网络的输入向量，地下水位本身作为网络的输出向量，构成了预测地下水位的BP网络模型。
Based on 2002 input and output table, this paper discussed the effect of 2008 Olympic Games on Beijing economy.
以投入产出分析方法，根据2002年北京市投入产出表，分析2008年北京奥运会对北京市经济的影响。
While many historical material itself authenticity resembles, nobody can guarantee the micro data not tamper with the composition, 'GIGO effect "(input waste, an example is output waste)."
而很多历史资料本身真伪难辨，谁也不能保证那些微观资料中没有篡改成分，‘GIGO效应’(输入废物，输出废物)便是一例。
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