Modulation instability of fiber Bragg gratings with the part Gaussian apodization;

The generalized objective function is improved,and Cauchy combination,Cauchy mutation and Gauss mutation are introduced.

Aiming at the disadvantages of Artificial Fish-School Algorithm(AFSA),this paper proposes a novel AFSA based on adaptive Gauss mutation and historical best fish.

In addition,a new crossover operator is proposed and the Gaussian mutation operator is used,which enhance population s diversity and algorithm s local search ability.

Gaussian mutation is applied to the two individuals if necessary in order to balance the lacal search ability and the global search abilty before crossover,thus efficiency of algorithm is improved,which can be showed .

In this paper,a new particle swarm opti-mization is proposed based on the threshold of evolutionary generation,maximal focusing distance and Gaussian mutation among particles.

When the crossover operator which is controlled by the generalized hamming distance have individuals less than the population size,a small local mutation carries on original population,which can avoid inbreeding,expand th.

Through the Yuwangshan fault zone study,the authors propose a qualitative and quantitative evaluation method for macroscopic guiding and local variability of the fault zone hydrogeological processes.