When training set is very large,espetially,SVM are many,the process of learning requires a great deal of EMS memory,and the speed of count is very slow,this bings big trouble in practice applications.

• 当训练集的规模很大特别是支持向量很多时,支持向量机的学习过程需要占用大量的内存,寻优速度非常缓慢,这给实际应用带来了很大的麻烦。