Update x2paddle_model_zoo.md

x2paddle_model_zoo.md

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 # TensorFlow
 
-| 模型 | 代码 |
-|------|----------|
-| SqueezeNet | [code](https://github.com/tensorflow/tpu/blob/master/models/official/squeezenet/squeezenet_model.py)|
-| MobileNet_V1 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/mobilenet_v1.md) |
-| MobileNet_V2 | [code](https://github.com/tensorflow/models/tree/master/research/slim/nets/mobilenet) |
-| ShuffleNet | [code](https://github.com/TropComplique/shufflenet-v2-tensorflow) |
-| mNASNet | [code](https://github.com/tensorflow/tpu/tree/master/models/official/mnasnet) |
-| EfficientNet | [code](https://github.com/tensorflow/tpu/tree/master/models/official/efficientnet) |
-| Inception_V4 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/inception_v4.py) |
-| Inception_ResNet_V2 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/inception_resnet_v2.py) |
-| VGG16 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/vgg.py) |
-| ResNet_V1_101 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/resnet_v1.py) |
-| ResNet_V2_101 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/resnet_v2.py) |
+| 模型 | 代码 | 备注 |
+|------|----------|------|
+| SqueezeNet | [code](https://github.com/tensorflow/tpu/blob/master/models/official/squeezenet/squeezenet_model.py)|-|
+| MobileNet_V1 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/mobilenet_v1.md) |-|
+| MobileNet_V2 | [code](https://github.com/tensorflow/models/tree/master/research/slim/nets/mobilenet) |-|
+| ShuffleNet | [code](https://github.com/TropComplique/shufflenet-v2-tensorflow) |-|
+| mNASNet | [code](https://github.com/tensorflow/tpu/tree/master/models/official/mnasnet) |-|
+| EfficientNet | [code](https://github.com/tensorflow/tpu/tree/master/models/official/efficientnet) |-|
+| Inception_V4 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/inception_v4.py) |-|
+| Inception_ResNet_V2 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/inception_resnet_v2.py) |-|
+| VGG16 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/vgg.py) |-|
+| ResNet_V1_101 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/resnet_v1.py) |-|
+| ResNet_V2_101 | [code](https://github.com/tensorflow/models/blob/master/research/slim/nets/resnet_v2.py) |-|
+| UNet | [code1](https://github.com/jakeret/tf_unet )/[code2](https://github.com/lyatdawn/Unet-Tensorflow) 
+|MTCNN | [code](https://github.com/AITTSMD/MTCNN-Tensorflow) |-|
+|YOLO-V3| [code](https://github.com/YunYang1994/tensorflow-yolov3) | 转换需要关闭NHWC->NCHW的优化，见[文档Q2](https://github.com/PaddlePaddle/X2Paddle/blob/develop/FAQ.md) |
 
 # Caffe