add escm2 model

Author: wangzhen38

README_CN.md

@@ -178,6 +178,7 @@ python -u tools/static_trainer.py -m models/rank/dnn/config.yaml #  静态图训
   |  多任务  |                     [ShareBottom](models/multitask/share_bottom/)([文档](https://paddlerec.readthedocs.io/en/latest/models/multitask/share_bottom.html))                      |  [Python CPU/GPU](https://aistudio.baidu.com/aistudio/projectdetail/3238943)  |       ✓     |     ✓     | >=2.1.0 | [1998][Multitask learning](http://reports-archive.adm.cs.cmu.edu/anon/1997/CMU-CS-97-203.pdf)                                                                                                               |
   |  多任务  |                                 [Maml](models/multitask/maml/)([文档](https://paddlerec.readthedocs.io/en/latest/models/multitask/maml.html))                                 |  [Python CPU/GPU](https://aistudio.baidu.com/aistudio/projectdetail/3238412)  |      x      |     x     | >=2.1.0 | [PMLR 2017][Model-agnostic meta-learning for fast adaptation of deep networks](https://arxiv.org/pdf/1703.03400.pdf)                                                                                                               |
   |  多任务  |                         [DSelect_K](models/multitask/dselect_k/)([文档](https://paddlerec.readthedocs.io/en/latest/models/multitask/dselect_k.html))                          |  -  |      x      |     x     | >=2.1.0 | [NeurIPS 2021][DSelect-k: Differentiable Selection in the Mixture of Experts with Applications to Multi-Task Learning](https://arxiv.org/pdf/2106.03760v3.pdf)                                                                                                               |
+  |  多任务  |                         [ESCM2](models/multitask/escm2/)                          |  -  |      x      |     x     | >=2.1.0 | [SIGIR 2022][ESCM2: Entire Space Counterfactual Multi-Task Model for Post-Click Conversion Rate Estimation](https://arxiv.org/pdf/2204.05125.pdf)                                                                                                               |
   |  重排序  |                                      [Listwise](https://github.com/PaddlePaddle/PaddleRec/tree/release/1.8.5/models/rerank/listwise/)                                       |  -  |       ✓     |     x     | [1.8.5](https://github.com/PaddlePaddle/PaddleRec/tree/release/1.8.5) | [2019][Sequential Evaluation and Generation Framework for Combinatorial Recommender System](https://arxiv.org/pdf/1902.00245.pdf)                                                                           |
 
 

README_EN.md

@@ -169,6 +169,7 @@ python -u tools/static_trainer.py -m models/rank/dnn/config.yaml #  Training wit
   |      Multi-Task       |           [ShareBottom](models/multitask/share_bottom/)<br>([doc](https://paddlerec.readthedocs.io/en/latest/models/multitask/share_bottom.html))           |  [Python CPU/GPU](https://aistudio.baidu.com/aistudio/projectdetail/3238943)  |         ✓         |     ✓     |  >=2.1.0 | [1998][Multitask learning](http://reports-archive.adm.cs.cmu.edu/anon/1997/CMU-CS-97-203.pdf)                                                                                                               |
   |      Multi-Task       |           [Maml](models/multitask/maml/)<br>([doc](https://paddlerec.readthedocs.io/en/latest/models/multitask/maml.html))           |  [Python CPU/GPU](https://aistudio.baidu.com/aistudio/projectdetail/3238412)  |    x      |     x     | >=2.1.0 | [PMLR 2017][Model-agnostic meta-learning for fast adaptation of deep networks](https://arxiv.org/pdf/1703.03400.pdf)                                                                                                               |
   |  Multi-Task  |           [DSelect_K](models/multitask/dselect_k/)<br>([doc](https://paddlerec.readthedocs.io/en/latest/models/multitask/dselect_k.html))           |  -  |      x      |     x     | >=2.1.0 | [NeurIPS 2021][DSelect-k: Differentiable Selection in the Mixture of Experts with Applications to Multi-Task Learning](https://arxiv.org/pdf/2106.03760v3.pdf)                                                                                                               |
+  |  Multi-Task  |                         [ESCM2](models/multitask/escm2/)                          |  -  |      x      |     x     | >=2.1.0 | [SIGIR 2022][ESCM2: Entire Space Counterfactual Multi-Task Model for Post-Click Conversion Rate Estimation](https://arxiv.org/pdf/2204.05125.pdf)                                                                                                               |
   |        Re-Rank        |                [Listwise](https://github.com/PaddlePaddle/PaddleRec/tree/release/1.8.5/models/rerank/listwise/)                |  -  |         ✓         |     x     |  [1.8.5](https://github.com/PaddlePaddle/PaddleRec/tree/release/1.8.5) | [2019][Sequential Evaluation and Generation Framework for Combinatorial Recommender System](https://arxiv.org/pdf/1902.00245.pdf)                                                                           |
 
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