1 Introduction

2 Overview  
2.1 Problem Definition  
2.2 Taxonomy  

3 Predictive Learning of SSL4NS-TD  

4 Contrastive Learning of SSL4NS-TD  

5 Hybrid Learning of SSL4NS-TD  

6 Tackling Application Issues of SSL4NS-TD  

7 NS-TD Datasets and Benchmarks  

8 Future Directions  

9 Conclusion