The topics are not limited to those as below:

Machine Learning for Signal Processing

Deep learning/machine learning/AI algorithms
Tools/platforms for AI
Edge and cloud AI computing platforms
Hardware/neuromorphic accelerators
Hardware/software co-design and automation for AI

Design Methods of Signal Processing Systems

Optimization of signal processing algorithms
Compilers and tools for signal processing systems
Algorithm-to-architecture transformation
Dataflow-based design methodologies
Error-tolerant techniques for signal processing

Signal Processing Application Systems

Audio, speech, and language processing
Biomedical signal processing and bioinformatics
Image, video, and multimedia signal processing
Information forensics, security, and cryptography
Sensing and sensor signal processing
Signal processing for non-volatile memory systems
Latency-and power-constrained signal processing
Wireless communications and MIMO systems
Coding and compression
Signal processing for mixed-signal technologies

Data Fusion and Intelligent Control

Optimal Control
Nonlinear Systems and Control
Adaptive Control and Learning Control
Deep learning method
Industrial Artificial Intelligence
AI-based Control, Intelligent Control
Network Intelligence and Network Control
Transport Control Theory and Methodologies
Multi-sensor data fusion model
Statistical estimation algorithms for information fusion
Model-order reduction techniques for information fusion