MLEC 资料集 数据集 ñ Ť 训练/测试 traindata500.txt和testdata500.txt 16 0.5 $ \ lambda $ 500/100 traindata500x.txt和testdata500x.txt 16 随机 500/100 traindata1000.txt和testdata1000.txt 20 0.5 $ \ lambda $ 1000/200 traindata10000.txt和testdata10000.txt 20