Based on that, the article gives a general rating on the industrial cluster in Beijing CBD and the analysis of the existing problem.
以此为基础，结合北京CBD内的实际情况对北京CBD产业集群进行了总体评价并对存在问题进行了分析。
Our problem began with the analysis of an existing Web site.
我们首先分析现有的Web站点。
Based on the analysis of existing models, the problem of empty wagon distribution is abstractly described from varied studying viewpoint, TP model and EWDCO model are constructed.
在分析已有模型的基础上，从不同的研究角度，对空车调配问题进行抽象描述，建立了TP模型和EWDCO模型。
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