An Extension-Matter-Element Model-Based Estimation of City Ecosystem Health

City ecosystem is foundation of city development, To preserve city ecosystem health has respect to cities´ sustainable developmen. This thesis constructs an city ecosystem health estimation model based on extension-matter-element theory. And by using this model, this thesis makes an estimation of Shijiazhuang city ecosystem health, in order to provide a theoretical basis and practical guidance for the cities´ sustainable development.