In this paper, we establish two coupled fixed point theorems for multivalued nonlinear contraction mappings in partially ordered fuzzy metric spaces. The theorems presented extend some corresponding results due to ordinary metric spaces. An example is given to illustrate the usability of our results.
Plastic is a multi-purpose material produced in large quantities. However, the non-degradability of plastic waste also brings many negative effects. In order to solve the problem of plastic production waste, we first analyze which factors have a greater impact on the production of plastic waste, and for this reason, a multiple linear regression has been established. We quantify abstract influencing factors. After that, the data is put into Statistical Product and Service Solutions (SPSS) for processing, and the influence of different factors on plastic waste is calculated. We find that the production of plastics has the greatest impact on the increase of plastic waste, while mainland policies have the greatest impact on the reduction of plastic waste. Finally, we have a sensitivity analysis on this model to analyze the impact of various factors on the output of plastic waste.
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