How to keep the original characteristics of the digital media image is quite important in the image segmentation. In this paper, we propose a new algorithm for digital media image segmentation, and it is also can be used in the image processing.The algorithm is based on asynchronous particle swarm optimization algorithm to obtain the adaptive threshold; take the inertia factor into the algorithm, the optimal threshold has been acquired for the image segmentation. Compared with other particle swarm optimization algorithm, the algorithm has the advantages of stable, easy to converge to the optimal solution, and high segmentation speed.

This paper established the Measurement Model of Sustainable Development to determine the level of sustainable development of one country by processing the data with some fuzzy sets methodologies. Then We took Madagascar for an example, using the Principal Component Analysis and the data inside World Bank to get the main integrated indicators of the assessment of Sustainable Development and calculate the overall score. The result shows that environment and society improves slightly, but the population and the economy deteriorate. The improved Model of   1,1 GM Model in Grey Theory was used to predict the level of development of Madagascar. This method selects the Index values in each subsystem every year as the initial sequence and obtains the Time Response Sequence by MATLAB to test if the given policy is valid. Model First,we need to design a model to describe the sustainability of a country. This model should provide a measure to distinguish between countries and policy's sustainability. We will divide the research for a country's sustainability into four aspects, that is, to evaluate the coordinated development about population, resources and environment, economic and social. It is a quantitative analysis to discover the coordinated development about population, resources and environment, economy and society, is by the qualitative analysis stage into the implementation stage, using the quantitative mathematical methods and means to describe and evaluate the coordinated development status and trend of population, resources and environment, economic and social, to provide decisions and practical basis for guiding the coordinated development of the society, in order to better promote the sustainable development of the whole country. Specific contents should include: construction of the assessment indicator system, making sure the comprehensive development level, building the coordination degree and continued degree measure model those three parts. Construction of the assessment indicator system In order to be able to make a comprehensive, objective evaluation to these aspects, according to the connotation of coordinated development, together with the complexity of those systems, based on the scientific principle, realistic principle, system, locality principle and dynamic principle we divide the country's sustainable development evaluation into the evaluation of the following four subsystems.