Hanjie Xiao (2024) “Research on the Variable Fuzzy Evaluation Model of Ecotourism Resources in National Parks from a Big Data Perspective”, The International Journal of Multiphysics, 18(2), pp. 213 - 230. Available at: https://themultiphysicsjournal.com/index.php/ijm/article/view/1260 (Accessed: 19November2025).