说明：  鸽群算法的思想是模拟鸽群利用地球磁场和地标组合来归巢的过程。鸽群算法具有原理相对简单、所需调整的参数较少、比较容易实现等特点。
(The idea of pigeon colony algorithm is to simulate the homing process of pigeons using the combination of geomagnetic field and landmark. Pigeon colony algorithm has the characteristics of relatively simple principle, less parameters to be adjusted and easy to implement.)