模式识别与人工智能
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2026 Vol.39 Issue.6, Published 2026-06-25

Brain-Computer Interface Technology and Its Applications   
   
Brain-Computer Interface Technology and Its Applications
473 Research on Asynchronous Steady-State Visual Evoked Potential Brain-Computer Interface Technology and Its Applications
LIU Xuyang, LI Hui, XU Guanghua
Steady-state visual evoked potential-based brain-computer interfaces (SSVEP-BCIs) are regarded as mainstream research paradigms among non-invasive brain-computer interfaces due to their high signal-to-noise ratio, low training cost, and high information transfer rate. Compared with traditional synchronous control modes, asynchronous SSVEP-BCIs are free from fixed timing constraints and are capable of adapting to free, continuous and natural human-computer interaction scenarios, offering outstanding advantages for real-world deployment. In this paper, the research status and development of asynchronous SSVEP-BCI technology are systematically reviewed from three perspectives: brain-state detection, electroencephalogram (EEG) decoding, and asynchronous brain-controlled applications. In the two core technical areas of brain state detection and EEG decoding, the existing technical solutions and their limitations are analyzed. New decoding techniques based on EEG nonlinear dynamics are discussed in detail. New approaches for weak EEG feature extraction and the suppression of strong noise are introduced. In terms of application, diverse application scenarios of asynchronous SSVEP-BCIs are presented. Brain-controlled hybrid intelligent robotic systems are highlighted. Finally, current bottlenecks in asynchronous SSVEP-BCI technology are summarized. It is pointed out that nonlinear dynamics modeling and decoding, together with the integration of multiple intelligent technologies, are the development directions for constructing high-performance and robust asynchronous BCIs.
2026 Vol. 39 (6): 473-488 [Abstract] ( 14 ) [HTML 1KB] [ PDF 3701KB] ( 11 )
489 Knowledge-Driven Multi-scale Spatial-Temporal Decoding Network for Speech Brain-Computer Interfaces
JIA Zhihong, WU Dongrui, ZENG Yuan
To address the lack of speech-specific modeling mechanisms in general decoding models, a knowledge-driven multi-scale spatio-temporal decoding network for speech brain-computer interfaces(KMST-Former) is proposed. Based on the low-frequency modulation characteristics of speech-related neural activity, parallel multi-scale temporal branches are constructed to capture neural dynamic patterns at different temporal scales. Scale-specific channel attention mechanisms are introduced into each branch to adaptively model spatial coordination. A two-stage spatio-temporal fusion module is then employed to integrate cross-scale and cross-channel information into unified representations. Finally, a Transformer encoder is used to capture long-range temporal dependencies. Experiments demonstrate the superior overall performance of KMST-Former. The effectiveness of multi-scale spatio-temporal modeling guided by speech prior knowledge for enhancing neural feature discrimination is verified.
2026 Vol. 39 (6): 489-503 [Abstract] ( 12 ) [HTML 1KB] [ PDF 1337KB] ( 11 )
504 Compression-Guided Hyperbolic Interpolation Fusion Method for Visual Neural Decoding
ZHANG Kaifan, LIU Jun, JI Yuqi, HE Lihuo

Visual neural decoding based on electroencephalography(EEG) is designed to retrieve images perceived by subjects from brain activity. To address the issues of low signal-to-noise ratio in EEG signals, redundancy in visual teacher features and the difficulty for a single teacher to simultaneously preserve both semantic structure and perceptual details, a compression-guided hyperbolic interpolation fusion method for visual neural decoding (CHIF) is proposed in this paper. First, lightweight compression modules are introduced into the structure-enhancement branch and the appearance-preservation branch to compress and adapt visual representations. Consequently, the modality gap between high-dimensional visual features and EEG representations is reduced. Second, a hyperbolic interpolation fusion module is designed. Teacher features are mapped into hyperbolic space. A unified teacher target is constructed through geodesic interpolation. Cross-modal alignment is achieved by combining hyperbolic distance and bidirectional contrastive learning. The experiments on an EEG-image retrieval dataset of 10 subjects demonstrate that CHIF achieves effective retrieval performance.

2026 Vol. 39 (6): 504-518 [Abstract] ( 12 ) [HTML 1KB] [ PDF 5625KB] ( 13 )
519 A Review of Deep Learning-Based Signal Fusion Methods for Multimodal Brain-Computer Interfaces
LI Jinhai, LIU Siyi, SHI Shuiling, LIU Wenqi
The signal fusion of multimodal brain-computer interfaces significantly improves decoding accuracy and robustness by mitigating the inherent drawbacks of a single modality in spatiotemporal resolution and signal-to-noise ratio. It is considered as an effective method for improving the performance of brain-computer interfaces. This paper is intended to synthesize the existing research results of deep learning-based multimodal brain-computer interfaces. First, existing literature is systematically classified into four categories based on different fusion strategies for modal data: data-level fusion, feature-level fusion, decision-level fusion, and hybrid strategy fusion. Then, based on the characteristics of deep learning models, fusion strategies are further subdivided and analyzed. The application scenarios of multimodal brain-computer interfaces are summarized, including the fields of motor imagery and motor rehabilitation, assessment and classification of the cognitive load, vigilance monitoring, emotion recognition,and auxiliary diagnosis and functional evaluation of neurological diseases. Finally, the difficulties faced by current signal fusion methods and multimodal deep learning are summarized. The future research directions are discussed and the future prospects are outlined.
2026 Vol. 39 (6): 519-536 [Abstract] ( 12 ) [HTML 1KB] [ PDF 985KB] ( 9 )
537 Review of Reinforcement Learning for Optimizing Brain-Computer Interface Systems: Theory and Applications
HE Jinyang, MEI Jie, HUANG Wenqie, CHEN Weize, XIAO Xiaolin, WANG Kun, XU Minpeng
To meet the practical requirements of brain-computer interfaces, the transformation of systems from traditional static design to human-machine dynamic adaptive design is regarded as one of the key methods to overcome the non-stationarity of neural signals. It contributes to the improvement of adaptive capability and overall performance of systems. Based on the fundamental theories of brain-computer interfaces and reinforcement learning, the optimization theories and applications of reinforcement learning in brain-computer interface systems are reviewed in this paper, focusing on the data acquisition, encoding/decoding and peripheral control links of non-invasive systems, as well as the relevant mechanisms for the decoding and peripheral control links of invasive systems. On the basis of the above, the online optimization mechanism of system parameters, strategies and control processes by reinforcement learning algorithms through the dynamic interaction with the environment is thoroughly investigated. The core value in enhancing the adaptability of the system to user state fluctuations, environmental noise interference and complex dynamic tasks is clarified. Finally, the current key technical challenges are analyzed and the development directions are briefly described, which provide a reference for constructing a new generation of brain-computer interface systems with long-term stability and autonomous adaptability.
2026 Vol. 39 (6): 537-553 [Abstract] ( 11 ) [HTML 1KB] [ PDF 1375KB] ( 5 )
554 Brain-Region-Prior Self-Supervised Pretraining Network for Cross-Subject EEG Emotion Recognition
GONG Wenle, LIU Zilong
To improve the generalization performance of cross-subject electroencephalogram(EEG) emotion recognition under limited annotation, a brain-region-prior self-supervised pretraining network(BSP-Net) is proposed. Brain-region topology is adopted as an inductive bias. Electrode channels are first modeled in groups by lightweight brain-region-aware channel attention. Then, two self-supervised tasks, masked brain-region modeling and brain-region prototype contrast, are jointly optimized on unlabeled EEG samples. Local inter-region dependencies and cross-subject brain-region representations are learned by the encoder. After pretraining, the encoder is connected to a lightweight capsule head for downstream emotion classification. Experiments on DEAP and DREAMER under a strict trial-level leakage-free leave-one-subject-out(LOSO) protocol show that the performance of cross-subject EEG emotion recognition under limited annotation conditions is improved by BSP-Net.
2026 Vol. 39 (6): 554-568 [Abstract] ( 10 ) [HTML 1KB] [ PDF 1051KB] ( 7 )
模式识别与人工智能
 

Supervised by
China Association for Science and Technology
Sponsored by
Chinese Association of Automation
NationalResearchCenter for Intelligent Computing System
Institute of Intelligent Machines, Chinese Academy of Sciences
Published by
Science Press
 
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