6.1　Sensitivity Analysis onα

αand(1-α)respectively represent the weights of Pressure and State which have crucial impact on the sustainable development of Haiti.We select differentα values to analyze the evaluation results as shown in Figure 3.

Figure 3　The influence ofαfor sustainability

It is shown thatα has a basically positive correlation with the evaluation results and greatly affects the results,,we choose has certain inclusiveness and does not produce excessive errors.