The human hand plays a role in a variety of daily activities. This intricate instrument is vulnerable to trauma or neuromuscular disorders. Wearable robotic exoskeletons are an advanced technology with the potential to remarkably promote the recovery of hand function. However, the still face persistent challenges in mechanical and functional integration, with real-time control of the multiactuators in accordance with the motion intentions of the user being a particular sticking point. In this study, we demonstrated a newly-designed wearable robotic hand exoskeleton with multijoints, more degrees of freedom (DOFs), and a larger range of motion (ROM). The exoskeleton hand comprises six linear actuators (two for the thumb and the other four for the fingers) and can realize both independent movements of each digit and coordinative movement involving multiple fingers for grasp and pinch. The kinematic parameters of the hand exoskeleton were analyzed by a motion capture system. The exoskeleton showed higher ROM of the proximal interphalangeal and distal interphalangeal joints compared with the other exoskeletons. Five classifiers including support vector machine (SVM), K-near neighbor (KNN), decision tree (DT), multilayer perceptron (MLP), and multichannel convolutional neural networks (multichannel CNN) were compared for the offline classification. The SVM and KNN had a higher accuracy than the others, reaching up to 99%. For the online classification, three out of the five subjects showed an accuracy of about 80%, and one subject showed an accuracy over 90%. These results suggest that the new wearable exoskeleton could facilitate hand rehabilitation for a larger ROM and higher dexterity and could be controlled according to the motion intention of the subjects.

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With the deepening development of the Guangdong-Hong Kong-Macao Greater Bay Area, the water security situation is becoming increasingly tense and causing frequent illegal and criminal incidents on the water, which has brought great harm to the economy and people's lives in the Bay Area. On the surface of the public security analysis, the public security organs to the importance of the water police is the direct reason of the deterioration of the water security situation. The deep factors include the existing problems in the form of police organization form in the Pearl River Delta, the lack of police talents in foreign-related waters, the formation of mass prevention and mass governance network by unrelated people, the urgent need of water-related laws, and the fuzzy police organization form in water waters. The prevention and control of public security in waters should start from strengthening the legal standardization and unity construction of water area public security law enforcement, developing the academic education of water area police officers, cultivating professional water area police talents and strengthening the joint prevention and cooperation mechanism of public security in the Pearl River Delta region.

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