一种改进X-best引导个体和动态等级更新机制的鸡群算法

在群智能算法的改进中，常利用优秀个体加速算法收敛，但对其依赖过度会导致种群多样性和算法全局收敛性下降的现象。对此，提出一种改进X-best引导个体和动态等级更新机制的鸡群算法。首先，在个体更新阶段不仅引入优秀个体加速收敛，并且通过普通个体对优秀个体的影响进行适当平衡，因此，优秀个体与普通个体的信息都能得到利用，进而种群多样性和算法全局收敛性得到提升。其次，通过对等级更新参数进行动态优化，加强了种群等级更新机制对算法收敛的促进作用。最后，经过时间复杂度与收敛性分析，证明了改进算法仍具有简单性和全局收敛性。仿真结果表明:所提出的改进算法较其他对比算法在寻优精度、寻优成功率和收敛速度等方面都具有明显优势。 

A chicken swarm optimization algorithm based on improved X-best guided individual and dynamic hierarchy update mechanism

In the improvement process of swarm intelligence algorithms, elite individuals are often used to accelerate the convergence, but excessive dependence on them will lead to the decline of population diversity and global convergence. In this regard, a chicken swarm optimization algorithm based on improved X-best guided individual and dynamic hierarchy update mechanism is proposed in this paper. Firstly, in the individual update stage, elite individuals are introduced into the search equation to accelerate the convergence, while the ordinary individuals are also introduced into the search equation to balance the influence of the elite individuals. Therefore, the information of elite and ordinary individuals can be fully used, and the population diversity and global convergence are improved. Secondly, by dynamically optimizing the hierarchy update parameter, the promotion effect of the population hierarchy update mechanism on the convergence is strengthened. Finally, through complexity and convergence analysis, the simplicity and global convergence of IDCSO are proved. The simulation results show that IDCSO has obvious advantages over other comparative algorithms in terms of optimization accuracy, optimization success rate and convergence speed.