in conventional dea models, decision making units (dmus) are generally assumed as a black-box while the performance of decision making sub-units (dmsus) and their importance play crucial roles in  analyzing the performance of systems which have internal processes. the present paper introduces an ideal network which have efficient processes and next purposes a new approach for evaluating importa...

Both theoretical and empirical findings have suggested that combining different models can be an effective way to improve the predictive performance of each individual model. It is especially occurred when the models in the ensemble are quite different. Hybrid techniques that decompose a time series into its linear and nonlinear components are one of the most important kinds of the hybrid model...

Coal is the dominant source of electric power in the United States, providing nearly 50 percent of all electricity in the country. In comparison, the other major sources of electricity – natural gas and nuclear power – supply only about 20 percent each of the country’s electricity, and renewable energy sources account for less than 10 percent. Until recently, it appeared that coal would retain ...

introduction: with using multiple linear regression (mlr), can simultaneously analyses several different variables, but to get the desirable results from the mlr, the samples must be much and accurate. therefore, this method has high sensitivity and may cause errors in results. in addition, to use this method, the variable must have normal distribution and modification follow from a linear rela...

Introduction Competition policy presents an interesting case of Europeanization, given that the two classic channels which promote the convergence of national regulations in the EU (that is, negative, market-related regulatory competition on the one hand, and positive, state-led harmonization on the other) does not apply to this policy domain (van Waarden and Drahos, 2002: 913). In terms of pos...