基于遗传蚁群算法的S盒构造

提出一种基于遗传蚁群算法的S盒构造方法,算法中两次插入遗传算法,利用遗传算法前期收敛速度较快及交叉变异操作避免陷入局部最优的特性,加快蚁群算法的收敛速度,提高求解的效率。基于该方法,给出了构造S盒的完整算法流程图,并获得一批高非线性度和低差分均匀度的S盒。实验结果表明,与利用遗传算法构造S盒的方法相比,该构造方法能有效地减少冗余计算量、加快收敛速度。

基于遗传禁忌算法的S盒优化算法

提出了一种基于遗传禁忌算法的S盒优化方法,算法中引入了小生境技术用来保持种群的多样性,防止早熟收敛.将S盒的雪崩准则和扩散特性等其他性能亦作为演化的目标,对S盒的优化进行更为深入的研究.实验结果表明基于改进遗传禁忌算法构造S盒是有效可行的,不但能获得一批高非线性度和低差分均匀度的S盒,并且能有效地减少冗余计算量、加快收敛速度.

The mechanism and criterion of tectonic zone around karstic collapse column reactivation-induced water-conducting

In order to study the mechanism of tectonic zone around karstic collapse col-umn reacts to leak water and prevent water invasion in mine. According to the character of the surrounding cracks- penetrated water KCC, The fracture mechanics theory can be used to study the propagation and perforation process of cracks and hitches around the KCC. The criterion of crack start rupture and the length of secondary crack and criterion of crack propagation have been attained. The influencing factors of KCC reacts to water con-duction were analyzed.