Then regression of mathematical models is used to study the distribution of population and the evolution of spatial structure of Beijing Metropolitan Area.
继而，通过数学模型的回归研究北京都市区人口分布及空间结构的演化趋势。
This paper presents two algorithms of linear feature selection used for the study of strong earthquake zoning in Beijing area.
本文介绍两种线性特征选择算法，并用于北京地区强震危险区划的研究。
Objective to monitor the distribution and resistance of enteric pathogenic bacteria in Beijing area to offer the data for guiding epidemiologic study and clinical treatment.
目的监测北京地区肠道致病菌的组成及耐药状况，为本地区的流行病学研究及临床合理用药提供依据。
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