“…In this paper, the guiding ideology of building 3E decision support platform includes the focus of the 3E sustainable development (You et al, 2011), the integration of Beijing and China Major cities' 3E indicator data in ten years (Wang et al, 2009b), the OLAP analysis tools, common computing analysis tools, the latest achievement of scientific research, as well as policies and regulations in the recent years. Figure 2 describes the framework of the 3E decision support platform (Wang and Shen, 2009 This paper provides a definition for the specific functions of the 3E decision support platform, including the mathematical computation software, the comparative analysis (Liu et al, 2012b), the OLAP analysis, the prediction and warning (Wang et al, 2009a), and the applied research (Wang et al, 2011a).…”