Extenics Evaluation Method Research On Ecological Security Of Tourist City

Ecological problems of the tourist city should be analysised from two aspects, that the tourist and urban ecological environmental problems, these problems have an adverse impact on maintaining tourist city ecological security, thereby constraining the sustainable development of the tourist city. Therefore, we need evaluate tourist city ecological security, determine analysis the ecological security situation, not only can we perfect the tourism sustainable development theory, but provide a scientific basis for tourist cities with ecological environment planning, construction, management and regulation, so it has important theoretical and practical significance.Taking ecological security theory and methods as research basis, combined with the characteristics of tourism to further deepen the concept, connotation and characteristics of tourism city ecological security. Based on he sustainable development theory, urban complex system theory and ecological economic theory, the influencing factors of the tourist city ecological security are analyzed, includes economic ecological factors, natural ecological factors and social ecological factors, the analytic hierarchy process and travel urban ecological security pressure-state-response model are combined to construct tourist city ecological security evaluation index system, and entropy theory is used to optimize the index system by calculating the degree of distinction and excluding indicators contain overlap and duplication information. Propose a new method to determine the combined weight, the gray and AHP are combined to determine the objective and subjective weight, finally used the Lagrange function equation to derive the comprehensive weight. Adopting the extenics evaluation method of resolving the incompatibility problem to built the matter-element matrix, established the matter-element and extension theory evaluation model of ecological security in tourist city. The model is used to the empirical research to detecte the scientific, take Taiyuna city as a case study, previous studies and related official documents and statistical yearbook are used to obtain original data, and calculated the correlation of the tourist city ecological safety level.The survey results show, Taiyuan tourism comprehensive correlation degree of ecological security in2011and2012are-0.0238and-0.0430, both in "good" condition,comparatively speaking, the2012tourism development in environmental and ecological security situation is better, shows that Taiyuan tourism economy and ecological environment presents a constantly good trend continuation by improving related measures.The innovation in this thesis may be the following aspects:This thesis used the information entropy to screen and optimizate theevaluation index system by calculating the entropy, to determine the size of discrimination, discarded indicators that contains overlap and duplication of information and less impact on the evaluation results, which greatly reduces the noise caused by the data evaluation distortion; applying a new way-the combination weighting method to determine the comprehensive weight, using AHP method and gray correlation method to determine the index of subjective and objective weights, through the establishment of Lagrange function to determine indicators comprehensive weight, which considering the researcher’s subjective experience and reducing the objective factors, and we can get more scientific evaluation results;implanting matter-element analysis and extension theory to tourism urban ecological security evaluation in the first time, expand the application scope of the extenics theory, open up a new ideas for tourism urban ecological security evaluation. This thesis considers that,through scientific analysis the evaluation results, earnestly implement the maintenance of urban ecological security tourism development strategies and proposal that can promote tourism city rational development of tourism resources, enhance tourism urban ecological environment evaluation capacity, standardize the ecological security management of the tourist city,which has important theoretical and practical significance to achieve sustainable development of ecological security in tourist city.