A new loosening model is developed for the faults of bearing caps due to loosening,which were often found in actual operation in view of the advantages and disadvantages of various existing pedestal loosening models.

0 in future 50a were calculated by applying Brownian Passage Time and Possion models.

Improved restoration method based on Poisson model;

Based on the long-term monitoring data of post-construction settlement of the loess subgrade of the Lanzhou-Wuwei Line Ⅱ,the quasi consolidation model was set up and contrasted with other models such as the Poisson model,index model, logarithm model and hyperbolic model.

The characteristics of the modified Poisson model and its applicability were analyzed and a modified Poisson-superposition wavelet neural net model was proposed.

Using an L2 energy method proves that the solutions of the general initial-boundary problem to this relaxation model converges time-asymptotically to a stationary wave or a rarefaction wave or superposition of these two kinds wave for small perturbation.

Under the condition of large initial disturbance, using an L~2 energy method proves that the solutions of the initial-boundary value problem to this relaxation model with one-side boundary effect converges time-asymptotically to a strong rarefaction wave or a weak stationary wave.