Integrated Ecological Assessment of Engineering Projects Based on Emergy Analysis

For a long time, the problems of complex system mechanism of major engineering, such as lack of acknowledge, inconsistence of scale, insufficient quantification and lack of valid direct viewing evaluation tools lead to decision failures of major engineering projects. Under the view of engineering ecology, based on system theory and system ecology, employs system analysis method and ecological network analysis method, activates engineering. Given emergy as the uniform scale, adopting emergy analysis methods, building up emergy evaluation index system of major engineering can realize quantitative assessment of major engineering. Employing the integration of computational experiments methods and emergy analysis methods realizes the numerical simulation of complex system mechanism of major engineering; getting help from the integration of BIM, GIS and Multi-agent technique makes the linguistic expressions of space and analog simulation come true, to emerge ecological evolution. The study of this project, with theoretical significance and using value, converting comprehensive assessment to ecological assessment, provides brand-new theory, methods and decision tools for the evaluation of major engineering projects.