Update readme.md

dynamic_to_static/readme.md

@@ -8,8 +8,10 @@ pip install onnx-simplifier
 ```
 
 ```python
+# 简化模型
 python -m onnxsim ../resnet50.onnx ../resnet50_1x3x224x224.onnx --test-input-shape input:1,3,224,224 
-
+# 动态shape变成静态shape
+python -m onnxsim ./${model_name}_simply.onnx ./${model_name}_simply_1x3x32x900.onnx --overwrite-input-shape x:1,3,32,900
 
 # 查看详细帮助内容
 python -m onnxsim -h