中文说明：带有QoS约束的组播路由问题是一个NP完全问题，遗传模拟退火算法是遗传算法和模拟退火算法的一种融合，可以为这类问题提供一个解决方案
English Description：
Multicast routing problem with QoS constraints is a NP complete problem. Genetic simulated annealing algorithm is a combination of genetic algorithm and simulated annealing algorithm, which can provide a solution for this kind of problem