update config

doc/doc_ch/config.md

@@ -17,7 +17,7 @@
 | :----------------------: |  :---------------------:   | :--------------:  |   :--------------------:   |
 |      use_gpu             |    设置代码是否在gpu运行           |       true        |                \                 |
 |      epoch_num           |    最大训练epoch数             |       500        |                \                 |
-|      log_smooth_window   |    滑动窗口大小            |       20          |                \                 |
+|      log_smooth_window   |    log队列长度，每次打印输出队列里的中间值            |       20          |                \                 |
 |      print_batch_step    |    设置打印log间隔         |       10          |                \                 |
 |      save_model_dir      |    设置模型保存路径        |  output/{算法名称}  |                \                 |
 |      save_epoch_step     |    设置模型保存间隔        |       3           |                \                 |

doc/doc_en/config_en.md

@@ -16,7 +16,7 @@ Take rec_chinese_lite_train_v2.0.yml as an example
 | :----------------------: |  :---------------------:   | :--------------:  |   :--------------------:   |
 |      use_gpu             |    Set using GPU or not           |       true        |                \                 |
 |      epoch_num           |    Maximum training epoch number             |       500        |                \                 |
-|      log_smooth_window   |    Sliding window size            |       20          |                \                 |
+|      log_smooth_window   |    Log queue length, the median value in the queue each time will be printed           |       20          |                \                 |
 |      print_batch_step    |    Set print log interval         |       10          |                \                 |
 |      save_model_dir      |    Set model save path        |  output/{算法名称}  |                \                 |
 |      save_epoch_step     |    Set model save interval        |       3           |                \                 |