Papers by Author: Ya Ping Li

Abstract: According to the analysis of distributing characteristics which obtained by the investigation of different types vehicles of many freeways, the law is discovered that distributing characteristics of same types of vehicles are similar on different freeways, using test to certificate that distributions of same types of vehicles are submitted to identical normal distribution, and the rationality of this phenomenon is discussed with statistical point of view. Calculated and predicted method of wheelpath distribution and axle load distribution are established that based on traffic flow. In the end, an example is used to confirm the accuracy of this method by contrasting the survey result and the predicted result.

Abstract: Montmorillonite was introduced into the multicomponent epoxy resin by using the intercalation polymerization. Intercalation effect of epoxy/montmorillonite composite system and the influence of the addition of montmorillonite on the glass transition temperature (Tg), mechanical properties and barrier of H2S to coating under high temperature and pressure conditions were investigated. The results showed that it was easy to intercalate epoxy resin into the organic montmorillonite layers, and the interlayer spacing of Montmorillonite was further swelled. In addition, the epoxy/montmorillonite nanocomposite coating with intercalated/ exfoliated structures were prepared. Compared to pure epoxy coating, the heat resistance and mechanical properties of epoxy/montmorillonite nanocomposite coating were slightly improved, and the barrier efficiency to H2S was substantially increased under high temperature and pressure oil-gas environment.