update explainable ai (#73)

* update explainable ai

* update explainable ai

* fix citation errors (#60)

Co-authored-by: lhy <hlicn@connect.ust.hk>

mlsys.bib

@@ -592,3 +592,40 @@ numpages = {22}
   year={1978},
 }
 
+@ARTICLE{2020tkde_li,
+  author={Li, Xiao-Hui and Cao, Caleb Chen and Shi, Yuhan and Bai, Wei and Gao, Han and Qiu, Luyu and Wang, Cong and Gao, Yuanyuan and Zhang, Shenjia and Xue, Xun and Chen, Lei},
+  journal={IEEE Transactions on Knowledge and Data Engineering},
+  title={A Survey of Data-driven and Knowledge-aware eXplainable AI},
+  year={2020},
+  volume={},
+  number={},
+  pages={1-1},
+  doi={10.1109/TKDE.2020.2983930}}
+
+@inproceedings{erhan2009visualizing,
+    title = {Visualizing {Higher}-{Layer} {Features} of a {Deep} {Network}},
+    author = {Erhan, Dumitru and Bengio, Yoshua and Courville, Aaron C. and Vincent, Pascal},
+    year = {2009},
+    keywords = {Activation function, anatomical layer, Architecture as Topic, Convolutional neural network, Expectation–maximization algorithm, Experiment, High-level programming language, Interpretation Process, Noise reduction, Sampling (signal processing), Supervised learning}
+}
+
+@InProceedings{kim2017interpretability,
+    title =      {Interpretability Beyond Feature Attribution: Quantitative Testing with Concept Activation Vectors ({TCAV})},
+    author =      {Kim, Been and Wattenberg, Martin and Gilmer, Justin and Cai, Carrie and Wexler, James and Viegas, Fernanda and sayres, Rory},
+    booktitle =      {Proceedings of the 35th International Conference on Machine Learning},
+    pages =      {2668--2677},
+    year =      {2018},
+    volume =      {80},
+    publisher =      {PMLR}
+}
+
+@article{riedl2019human,
+    title={Human-centered artificial intelligence and machine learning},
+    author={Riedl, Mark O.},
+    journal={Human Behavior and Emerging Technologies},
+    volume={1},
+    number={1},
+    pages={33--36},
+    year={2019},
+    publisher={Wiley Online Library}
+}