摘要
Tackling future global emissions of carbon dioxide is a daunting task. Different black box models have been used to determine the trajectories of CO2 emissions and other carbon stocks. Trajectories are important because climate modelers use them to project future climate under higher atmospheric CO2 concentrations. In this paper, fully connected two-layer feed-forward neural network with tangent activation function that comes with hidden neurons as well as linear output neurons was used. The study applied classical nonlinear least squares algorithm such as LM (Levenberg-Marquardt), to predict potential emissions of selected emerging economies. Building the model on the basis of input variables such as crop production, livestock production, trade imports, trade exports, economic growth, renewable and nonrenewable energy consumption. These variables are considered to affect the ecosystems of high rising economic power states. The main idea is to ensure that emerging economies have a clear understanding of expected future emissions so that appropriate measures can be implemented to mitigate its impact. Data for the analysis were obtained from 1971 to 2013 from World Development Indicators and FAOSTAT database. Results indicate an achievement of training performance at epoch 11 when the value of the MSE (Mean Square Error) is 0.0003345 which indicates that the model errors are less than 0.05. Hence, the study concluded that the applied model is capable of predicting potential carbon dioxide emissions in emerging economies with the greatest precision.
基金
the Korean National Research Foundation Grant,funded by the Korean Government [NRF-2014SIA2027622]
supported in part by the National Science Foundation of China under grants 71471076, 71171099, 71373818 and 71201071
the Joint Research of the NSFC-NRF Scientific Cooperation Program under grant 71411170250
the Research Fund for the Doctoral Program of Higher Education under grant 20123227110011.