Design The Model Of Calculating Ecosystem Services Value

The function of Ecosystem Services refers to keep a natural environment condition and effectiveness depend on human beings by Ecosystem. Not only the Ecosystem provides necessary food, medicine and raw material of industry and agriculture for human beings, but also it keeps a life support system that human beings rely on and develop (Daily, 1997; Ouyang Zhiyun; 1999). Ecosystem is a life support system and a foundation of human beings′Economy and society existence and advance.Along with the increasingly of deep research on the function value of Ecosystem Services, the calculation model of the function value of Ecosystem Services comes to fruition. But the calculation methods of the function value of Ecosystem Services develop slow. Abundant and complex calculation not only pays a high degree of difficulty, but also brings errors easily. So that it is inconvenient to check which has been one of the affliction by those who engage in research on the function value of Ecosystem Services. In order to resolve the problem on calculation and boost up the reliability and scientificity of calculation result, the article applies Object-Oriented software design methods, exploits reusable component of the function value of Ecosystem Services, form scientific and feasible calculation methods of automatic calculation on the function value of Ecosystem Services.The main content of the text includes five parts: The first three parts intend to introduce the significance of the research, the current situation of the research and some key technologies used in the research of the task. The reason to write these parts is that the readers could know the background of the text, so that they can know the latter research well. The fourth part introduce a exploitation platform used in the module design, Also the reasonableness of the platform effects the degree of difficulty and the rate of progress in component design directly. The interface of ecological value in calculation model, the function value of Ecosystem Services in database calculation design and the achievement in some key technologies are comprised in the fifth part, which plays a key role in the text. The design of interface take a great link in module design, which connect the module and outside in database exchange and has respect to whether the module is easy to use. The third part plans to validate the rightness, reasonableness and practicality in module design.The feature of my research have three parts:First of all, apply some advanced technologies and methods in computer science to research on the function value of Ecosystem Services. So that achieve a automatic calculation on the function value of Ecosystem Services. Based on the further research on the technology of software reuse , I tightly combine software reuse technique and GIS technique to study the application on the function value of Ecosystem Services calculation of GIS software reuse technique in theory and method aspects and study the exploit method of multiplex technique in GIS software exploitation. The calculational way applied in the research is to achieve automatic calculation on the function value of Ecosystem Services by computer program which can not depend on the database structure defined'by the user in calculating the function value of Ecosystem Services. The user could choose field selection participated in arithmetic in program by himself.In addition, induct the Object-Oriented technique to the process of calculation on the function value of Ecosystem Services. The Object-Oriented technique, used to change entity into abstract, is a computer software exploitation technique. We can get a kind of object with attribute and service through computer abstract. As a result, we can find out if we regard calculation space data element as a kind of object, each element will get its own attribute data and accomplish its ecologic value calculation based on its own attribute through abstract.In the third place, add amendment factors and enhance applicability of model. A prevailing way on calculation model of the function value of Ecosystem Services calculation is generated after studying specific research areas and they are effected much by natural environment. An identical model may not be used in other areas. This article induct amendment factors to this problem because of its flexible generate method and the only thing the user do is to offer final figure.