Add logo (#230)

* Add logo

* add papers

README.md

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 # Train Ticket：A Benchmark Microservice System
+<img src="./image/logo.png">
+----
 
 The project is a train ticket booking system based on microservice architecture which contains 41 microservices. The programming languages and frameworks it used are as below.
 - Java - Spring Boot, Spring Cloud
@@ -113,11 +115,45 @@ We have released a serverless version of Train Ticket.
 * [serverless-trainticket](https://github.com/FudanSELab/serverless-trainticket)
 
 ## Paper Reference
+Bowen Li, Xin Peng, Qilin Xiang, Hanzhang Wang, Tao Xie, Jun Sun, Xuanzhe Liu. <br/>
+**Enjoy your observability: an industrial survey of microservice tracing and analysis**<br/>
+Empirical Software Engineering, Volume 27 <br/>
+Download:[[PDF](https://link.springer.com/content/pdf/10.1007/s10664-021-10063-9.pdf)]
+
+<br/>
+
+Chenxi Zhang, Xin Peng, Chaofeng Sha, Ke Zhang, Zhenqing Fu, Xiya Wu, Qingwei Lin, Dongmei Zhang<br/>
+**DeepTraLog: Trace-Log Combined Microservice Anomaly Detection through Graph-based Deep Learning**<br/>
+In Proceedings of the 44th International Conference on Software EngineeringMay 2022([ICSE 2022](https://dblp.uni-trier.de/db/conf/icse/icse2022.html))<br/>
+Download:[[PDF](https://dl.acm.org/doi/pdf/10.1145/3510003.3510180)]
+
+<br/>
+
+Dewei Liu, Chuan He, Xin Peng, Fan Lin, Chenxi Zhang, Shengfang Gong, Ziang Li, Jiayu Ou, Zheshun Wu<br/>
+**MicroHECL: High-Efficient Root Cause Localization in Large-Scale Microservice Systems**<br/>
+2021 IEEE/ACM 43rd International Conference on Software Engineering: Software Engineering in Practice (ICSE-SEIP)<br/>
+Download:[[PDF](https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9402058)]
+
+<br/>
+
+Qilin Xiang, Xin Peng, Chuan He, Hanzhang Wang, Tao Xie, Dewei Liu, Gang Zhang, Yuanfang Cai<br/>
+**No Free Lunch: Microservice Practices Reconsidered in Industry**<br/>
+2CoRR abs/2106.07321 (2021)<br/>
+Download:[[PDF](https://arxiv.org/pdf/2106.07321.pdf)]
+
+<br/>
+
+Xiaofeng Guo, Xin Peng, Hanzhang Wang, Wanxue Li, Huai Jiang, Dan Ding, Tao Xie, Liangfei Su<br/>
+**Graph-based trace analysis for microservice architecture understanding and problem diagnosis**<br/>
+In Proceedings of the 28th ACM Joint Meeting on European Software Engineering Conference and Symposium on the Foundations of Software EngineeringNovember 2020<br/>
+Download:[[PDF](https://dl.acm.org/doi/pdf/10.1145/3368089.3417066)]
+
+<br/>
 
 
 Xiang Zhou, Xin Peng, Tao Xie, Jun Sun, Chao Ji, Dewei Liu, Qilin Xiang, and Chuan He. <br/>
 **Latent Error Prediction and Fault Localization for Microservice Applications by Learning from System Trace Logs.**<br/>
-In Proceedings of the 27th ACM Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering ([ESEC/FSE 2019](https://esec-fse19.ut.ee/)) , Tallinn, Estonia, August 2019. <br/>
+In Proceedings of the 27th ACM Joint European Software Engineering Conference and Symposium on the Foundations of Software Engineering ([ESEC/FSE 2020](https://dblp.uni-trier.de/db/conf/sigsoft/fse2020.html)) , Tallinn, Estonia, August 2019. <br/>
 Download: [[PDF](https://cspengxin.github.io/publications/fse19-zhou-microservice.pdf)] [[BibTeX](https://dblp.uni-trier.de/rec/bibtex/conf/sigsoft/Zhou0X0JLXH19)] 
 
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