Credibility Model based on Space-Time Information and Interactive Evaluation in sharing model

Existing reputation calculations are mostly based on malicious behavior and other comments. They fail to effectively integrate impacting factors, ignoring the authenticity of evaluation and the complexity of interaction. A user reputation model based on spatio-temporal information and interactive evaluation is presented: user reputation is affected by ontology and evaluation reputation, and they interact with each other. Considering the synthetical influence of time, space and behavior, a time-space-behavior three-layer model is constructed to measure the time-space impact on ontology and the behavior impact on evaluation reputation; distributing weight to ontology and evaluation reputation, the reputation formula is established to obtain the user reputation. Experiments show the reputation model considers the influence of time, space and behavior on the ontology and evaluation reputation. The higher accuracy of the calculated user reputation has a higher application prospect for sharing mode user reputation evaluation.