add a new multidataset zipformer model

model.py

@@ -283,6 +283,7 @@ def _get_english_model(
 ) -> sherpa.OfflineRecognizer:
     assert repo_id in [
         "WeijiZhuang/icefall-asr-librispeech-pruned-transducer-stateless8-2022-12-02",  # noqa
+        "yfyeung/icefall-asr-multidataset-pruned_transducer_stateless7-2023-05-04",  # noqa
         "csukuangfj/icefall-asr-librispeech-pruned-transducer-stateless3-2022-05-13",  # noqa
         "csukuangfj/icefall-asr-librispeech-pruned-transducer-stateless7-2022-11-11",  # noqa
         "csukuangfj/icefall-asr-librispeech-pruned-transducer-stateless8-2022-11-14",  # noqa
@@ -304,6 +305,12 @@ def _get_english_model(
     ):
         filename = "cpu_jit-torch-1.10.pt"
 
+    if (
+        repo_id
+        == "yfyeung/icefall-asr-multidataset-pruned_transducer_stateless7-2023-05-04"
+    ):
+        filename = "cpu_jit-epoch-30-avg-4.pt"
+
     nn_model = _get_nn_model_filename(
         repo_id=repo_id,
         filename=filename,
@@ -742,6 +749,7 @@ chinese_models = {
 
 english_models = {
     "wgb14/icefall-asr-gigaspeech-pruned-transducer-stateless2": _get_gigaspeech_pre_trained_model,  # noqa
+    "yfyeung/icefall-asr-multidataset-pruned_transducer_stateless7-2023-05-04": _get_english_model,  # noqa
     "WeijiZhuang/icefall-asr-librispeech-pruned-transducer-stateless8-2022-12-02": _get_english_model,  # noqa
     "csukuangfj/icefall-asr-librispeech-pruned-transducer-stateless8-2022-11-14": _get_english_model,  # noqa
     "csukuangfj/icefall-asr-librispeech-pruned-transducer-stateless7-2022-11-11": _get_english_model,  # noqa