diff --git a/examples/industrial_data_pretraining/seaco_paraformer/demo.py b/examples/industrial_data_pretraining/seaco_paraformer/demo.py
index e9e226d1c..85d989e44 100644
--- a/examples/industrial_data_pretraining/seaco_paraformer/demo.py
+++ b/examples/industrial_data_pretraining/seaco_paraformer/demo.py
@@ -25,6 +25,7 @@
 
 # example2
 import torchaudio
+import os
 wav_file = os.path.join(model.model_path, "example/asr_example.wav")
 input_tensor, sample_rate = torchaudio.load(wav_file)
 input_tensor = input_tensor.mean(0)
@@ -33,7 +34,7 @@
 
 # example3
 import soundfile
-import os
+
 wav_file = os.path.join(model.model_path, "example/asr_example.wav")
 speech, sample_rate = soundfile.read(wav_file)
 res = model.generate(input=[speech], batch_size_s=300, is_final=True)
diff --git a/funasr/bin/train.py b/funasr/bin/train.py
index d9d4d6241..8ea0c0db5 100644
--- a/funasr/bin/train.py
+++ b/funasr/bin/train.py
@@ -154,7 +154,7 @@ def main(**kwargs):
     if batch_sampler is not None:
         batch_sampler_class = tables.batch_sampler_classes.get(batch_sampler)
         batch_sampler = batch_sampler_class(dataset_tr, **kwargs.get("dataset_conf"))
-        batch_sampler_val = batch_sampler_class(dataset_tr, is_training=False, **kwargs.get("dataset_conf"))
+        batch_sampler_val = batch_sampler_class(dataset_val, is_training=False, **kwargs.get("dataset_conf"))
     dataloader_tr = torch.utils.data.DataLoader(dataset_tr,
                                                 collate_fn=dataset_tr.collator,
                                                 batch_sampler=batch_sampler,
diff --git a/funasr/datasets/audio_datasets/samplers.py b/funasr/datasets/audio_datasets/samplers.py
index 0d9309814..535df5d05 100644
--- a/funasr/datasets/audio_datasets/samplers.py
+++ b/funasr/datasets/audio_datasets/samplers.py
@@ -26,6 +26,8 @@ def __init__(self, dataset,
         self.max_token_length = kwargs.get("max_token_length", 5000)
         self.shuffle_idx = np.arange(self.total_samples)
         self.shuffle = shuffle and is_training
+        self.length_scale_source = kwargs.get("length_scale_source", 1.0)
+        
     
     def __len__(self):
         return (self.total_samples-1) // self.batch_size + 1
@@ -53,8 +55,10 @@ def __iter__(self):
                 
                 idx_map = self.shuffle_idx[idx]
                 # prompt = self.dataset.indexed_dataset[idx_map]["prompt"]
-                sample_len_cur = self.dataset.get_source_len(idx_map) + \
-                                 self.dataset.get_target_len(idx_map)
+                target_len = self.dataset.get_target_len(idx_map) if self.batch_type == 'length' else 0.0
+                source_len = self.dataset.get_source_len(idx_map) / self.length_scale_source
+                sample_len_cur = source_len + target_len
+                
                 
                 datalen_with_index.append([idx, sample_len_cur])
             
@@ -66,7 +70,7 @@ def __iter__(self):
                 
                 max_token_cur = max(max_token, sample_len_cur_raw)
                 max_token_padding = 1 + num_sample
-                if self.batch_type == 'length':
+                if self.batch_type != 'example':
                     max_token_padding *= max_token_cur
                 if max_token_padding <= self.batch_size:
                     batch.append(idx)
diff --git a/funasr/models/whisper/model.py b/funasr/models/whisper/model.py
index 6a6d47c6e..381a50161 100644
--- a/funasr/models/whisper/model.py
+++ b/funasr/models/whisper/model.py
@@ -10,6 +10,8 @@
 
 
 from funasr.models.whisper.utils.decoding import detect_language as detect_language_function, decode as decode_function
+from funasr.register import tables
+
 
 @dataclass
 class ModelDimensions:
@@ -128,6 +130,8 @@ def forward(
         return x
 
 
+
+@tables.register("encoder_classes", "WhisperEncoder")
 class AudioEncoder(nn.Module):
     def __init__(self, n_mels: int, n_ctx: int, n_state: int, n_head: int, n_layer: int):
         super().__init__()
@@ -158,7 +162,7 @@ def forward(self, x: Tensor):
         x = self.ln_post(x)
         return x
 
-
+@tables.register("decoder_classes", "WhisperDecoder")
 class TextDecoder(nn.Module):
     def __init__(self, n_vocab: int, n_ctx: int, n_state: int, n_head: int, n_layer: int):
         super().__init__()
@@ -193,7 +197,7 @@ def forward(self, x: Tensor, xa: Tensor, kv_cache: Optional[dict] = None):
 
         return logits
 
-
+@tables.register("model_classes", "Whisper")
 class Whisper(nn.Module):
     def __init__(self, dims: dict):
         super().__init__()