Update MODEL_ZOO.md

MODEL_ZOO.md

@@ -26,7 +26,7 @@ Note:
 - `alex` denotes [AlexNet](https://papers.nips.cc/paper/4824-imagenet-classification-with-deep-convolutional-neural-networks), `r50_lxyz` denotes the outputs of stage x, y, and z in [ResNet-50](https://arxiv.org/abs/1512.03385), and `mobilev2` denotes [MobileNetV2](https://arxiv.org/abs/1801.04381).
 - `dwxcorr` denotes Depth-wise Cross Correlation. See more in [SiamRPN++ Section 3.4](https://arxiv.org/abs/1812.11703).
 - The suffixes `otb` and `lt` are designed for the [OTB](http://cvlab.hanyang.ac.kr/tracker_benchmark/benchmark.html) and [VOT long-term tracking challenge](http://www.votchallenge.net/vot2018/), the default (without suffix) is designed for [VOT short-term tracking challenge](http://www.votchallenge.net/index.html).
-
+- All above models are trained on VID,YoutubeBB,COCO,ImageNetDet which are the same as DaSiamRPN.
 
 ### Video Object Segmentation Baselines