陈霸东

教授 、 博士生导师

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陈霸东

教授 、 博士生导师

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Research Interests

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Our research interests span a wide spectrum of topics in signal processing, machine learning, brain machine interfaces, brain disorder and development, brain inspired computing, battery management systems, intelligent robots, swarm intelligence, and so on.

1. Information Theoretic Learning

 
 
 
Our previous research in machine learning mainly focused on Information Theoretic Learning (ITL). The term “Information Theoretic Learning” was proposed by Jose C. Principe ( http://www.cnel.ufl.edu). Generally speaking, ITL uses descriptors from information theory (entropy, mutual information, divergences, etc.) estimated directly from the data to substitute the conventional statistical descriptors (such as covariance) in machine learning. Information theoretic quantities can capture higher-order statistics and offer potentially significant performance improvement in both supervised (classification, regression, adaptive filtering, etc) and unsupervised (subspace learning, feature selection, nonnegative matrix factorization, clustering, etc) learning tasks. 

2. Brain Machine Interfaces

     
 
 Brain Machine Interface (BMI), sometimes called Brain Computer Interface (BCI), is a direct communication pathway between a brain and an external device. BMIs are often directed at researching, mapping, assisting, augmenting, or repairing human cognitive or sensory-motor functions. BMI is also recognized as a man made device that either substitutes a sensory input to the brain, repairs functional communication between brain regions or translates intention of movements. Our research is mainly focusing on brain signal analysis (e.g. dependence and causality analysis) and neural decoding. The main goal of neural decoding is to characterize how the electrical activity of neurons elicit activity and responses in the brain. For example, when volunteers looked at handwritten letters, one can develop a computer model to produce fuzzy images of the letters they were seeing, based only on the volunteers’ brain activity.  The reasons that motivate BMI studies are simple. On one hand, we have the need to help people with disabilities. For example, we are encouraged to develop technologies to assist blind people to visualize external images and to assist paralyzed people to operate external devices without physical movement. On the other hand, BMI is promising to help us achieve the scenarios described in science fictions such as decoding information stored on human brain (i.e. memories) and decoding information from brain to display human thinkings or dreams on a screen. 

3. Brain Disorder and Brain Development

  

     Psychiatric diagnosis is essential for the early intervention and precision treatment for psychiatric disorder. However, current clinical diagnosis relies solely on symptoms and phenomenology, which may lead to misdiagnosis and delay the early treatment. Consequently, our research focuses mainly on developing useful diagnostic tools using psychosocial, biological, and cognitive signatures beyond clinical symptoms which obtain biologically meaningful biomarkers for psychiatric diagnosis (e.g., Alzheimer, Autism and Depression). In specific, we analysis magnetic resonance images (MRI) to obtain brain network features, by leveraging brain network analysis (e.g., functional connectivity). To ensure these features which is most informative to label, we use information theory (e.g., information bottleneck) to learn compact representations. Finally, these representations are sent to neural networks to make a decision (i.e., psychiatric patients and healthy controls). By combining structure MRI (sMRI), functional MRI (fMRI), diffusion MRI (dti-MRI) and other modalities, we also explore the development patterns of early brain, which could advance our understanding of early postnatal brain development and the develop-related diseases, especially for the critical structures that are not well-studied before, such as subcortical structures and cerebellum. The emotion and behavior data will also be included to find out the relationships between brain structures and emotion or behavior functions.

4. Brain Inspired Computing

 

     Brain-inspired computing serves as a crucial cornerstone for advancing artificial general intelligence, encompassing a multifaceted landscape of computational theories, system architectures, application models, and algorithms. Our research focus on presenting diverse training methodologies to train brain-inspired neural networks and spiking neural networks, achieving performance on par with or exceed artificial neural networks in complex recognition tasks with lower power consumption. In addition, we are directing our efforts towards the design of neuromorphic hardware, with the ultimate goal of creating brain-inspired chips and low-power AI chips. This endeavor is aimed at enabling the development of low-power robots and hardware devices equipped with neuromorphic computing capabilities. 

5. Battery Management Systems

  

     Batteries are presently pervasive in portable electronics, electrified vehicles, and renewable energy storage. Battery management is of paramount importance for operational efficiency, safety, reliability, and cost effectiveness of ubiquitous battery-powered energy systems. Owing to complicated electrochemical dynamics and multi-physics coupling, a trivial, black-box emulation of batteries that senses only voltage, current, and surface temperature obviously cannot result in high-performance battery management systems. How to accurately and robustly estimate and monitor critical internal states constitutes a key enabling technology for advanced battery management. Credible knowledge of State of Charge (SOC), State of Energy (SOE), State of Health (SOH), State of Power (SOP), State of Temperature (SOT), and State of Safety (SOS) is a prerequisite for effective charging, thermal, and health management of batteries. Our research seeks to advance the field of battery management systems by developing state-of-the-art methods in model-based filtering, machine learning, and physics-informed neural networks. These innovative approaches will contribute to safer, more efficient, and longer-lasting battery systems, benefiting a wide range of applications and industries reliant on energy storage technology.

6. Intelligent Service Robot

     
 

 We focus on the “cloud-edge-end” integration robot intelligence model. By taking the advantage of the rich computing resources of cloud computing and the low-latency rapid response characteristics of edge computing, such “cloud-edge-end” integration robot intelligence model allows us extract knowledge from "end" to "cloud" and apply knowledge from “cloud” to “end”. This model empowers robots in terms of computing power, responsiveness, privacy protection and knowledge sharing. In addition, large language models (LLMs) are the underlying technology driving the rapid rise of generative AI chatbots. Tools such as ChatGPT, Google Bard and Bing Chat rely on LLMs to generate human-like responses to prompts and questions. Through the interaction of the Large Language Model and the Visual Language Model, goals and obstacles to be avoided are analyzed in 3D space to help the robot plan its actions. Our research also focuses on how to get the LLM to automatically generate a proper motion planner, a map of corresponding action instructions, and related codes by giving simple natural language instructions. The environmental information is obtained from the VLM (Visual Language Model). The advantage of this work is that there is no need to pre-train the model. We use a large model to instruct the robot how to interact with the environment, which solves the problem of scarce training data for the robot and better realizes the zero-sample capability of robot intelligence.

7. Multi-Agent Swarm Intelligence

     
 
Smart unmanned systems have witnessed widespread adoption in military, communication, and commercial sectors. However, the rapid advancement of single-agent control technology has raised problems regarding their poor coordinated intelligence and fault tolerance. Specifically, single agents with incomplete perception suffer from unitary function and sensitiveness to environmental dynamicity. Moreover, automatic attitude control in robotics has been widely investigated, generating various typical algorithms, while the swarm intelligence of cooperation and confrontation remains uncertainty. We aim to provide some multi-agent insights for unmanned aerial vehicle (UAV) adversarial game. We will investigate 1V1 UAV confrontation game by using the mixed strategy Nash Equilibrium Theory, developing efficient UAV air maneuvering decision-making model. We will also macroscopically investigate UAV swarm intelligent attack and defense framework by using multi-agent deep reinforcement learning. We will evaluate the efficiency of our models on both simulation and real-world scenarios.   

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