Based on a river-crossing tunnel project,a three dimensional nonlinear FE model which includes the interactions between shield tunneling machine,soil and flood levee was established with stiffness transferring method and adaptive contact algorithm.

Self-distribution of Network Security Policy Based on Structure-dissimilarity

The adaptive heuristic critic(AHC) reinforcement learning frame is approximate of the value function and the policy function of Markov decision process(MDP),the stochastic MDPs can be converted to deterministic MDPs by the policy gradient reinforcement learning.

First,the main algorithms,temporal difference, \%Q \%learning and adaptive heuristic critic,are roundly introduced.

The algorithm is used in the adaptive transmitter-receiver isolation system of jammer and simulated with computer,the simulation results indicate the algorithm has fast convergence rate,lower steady .

Aimed at the disadvantage of slow convergence rate in frequency domain LMS algorithm, according to the combine of frequency domain LMS fast algorithm with variable step-size technique,a fast variable step-size adaptive transmitter-receiver isolation algorithm in frequency domain is presented based on a new Sigmoid function.