1 INTRODUCTION

2 PROBLEM DEFINITION  
2.1 Classical Settings of BURS  
2.2 Streaming Settings of IURS  

3 CHALLENGES  
3.1 System Dynamic Modeling  
3.2 Incremental Learning  

4 RELATED WORK  
4.1 System Dynamic Modeling  
4.2 Incremental Learning  

5 EVALUATION  
5.1 Offline Evaluation of BURS  
5.2 Offline Evaluation of IURS  

6 FUTURE RESEARCH DIRECTIONS  
6.1 Dynamic System Modeling  
6.2 Incremental Learning  
6.3 Retrieval Module  
6.4 Evaluation of IURS  
6.5 Connection with Other Areas in RS  

7 CONCLUSION