Research On Nonlinear Of Coastal Ecological Economy Based On Copula And SFA

Coastal zone is the combination part of the location advantages of land and ocean in the Earth's surface. Coastal ecological system not only produces high ecological, economic and social value, but also provides the mankind with the most valuable habitat. Study of the construction and analysis of coastal ecological economic model, research on the state transition of coastal ecological and economic system, and evaluation of input-output efficiency of Coastal urban ecological economy, provide theoretical basis for the sustainable development of coastal ecological economy and there is a widely application field.The text used nonlinear dynamics theory to do some research on the relationship of coastal ecology, environment and economy. First, The text constructed a coastal ecological economic model and analyzed it. Second, Copula method was used to fit the parameters of the coastal ecological economic model and do some research on the state transition of the model. Finally, Stochastic Frontier analysis (SFA) and Factor analysis were used for the evaluation of the input-output efficiency of Coastal urban ecological economy.1. Based on nonlinear dynamics theory, the text combined the characteristics of coastal ecological economy and constructed a coastal ecological economic model, and then did some research on the system nonlinear characteristics effect on the change of discharge intensity and environmental protection investment.Based on this, the state areas of coastal ecological economic system were divided, and the text did some research on the evolution process of coastal ecological economic system in each state areas. Therefore, it is important for the scientifical management of coastal ecological economy.2. Copula method was used to do some research on the control parameters of coastal eco-economic model. And the joint distribution function and correlation between discharge intensity and environmental protection investment were calculated, and the text combined the results of Copula with Markov method to adjust the control parameters to improve the state transition process of coastal ecological economic system. It is very meaningful to control discharge intensity reasonably and arrange environmental protection investment scientifically. 3. Construction of coastal urban ecological economy development index system and evaluation of input-output efficiency can reflect the level of coastal urban ecological economy development. Therefore, the text constructed coastal urban ecological economy development index system firstly, and used Factor analysis and Stochastic Frontier analysis to evaluate the input-output efficiency of ecological economy of 48 coastal cities, and give suggestions for the improvement of the level of Coastal ecological economy to ensure the sustainable development of coastal ecological economy in our country.