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排序方式： 共有959条查询结果，搜索用时 15 毫秒
861.
随着互联网信息的迅猛增加,高校数字图书馆信息资源极大丰富.尽管人们可以借助互联网上功能强大的搜索引擎和快捷的传送手段,使信息资源的搜集和获取变得十分容易,然而在使用中,用户快速、准确地查找自己所需的信息却越来越困难.笔者介绍了Web挖掘技术,并分析了如何将其应用到高校数字图书馆建设中,为用户提供个性化信息的主动推送服务. 相似文献
862.
863.
Jialu Li Junyi Cai Jianyong Yu Zhaoling Li Bin Ding 《Advanced functional materials》2023,33(44):2303249
Piezo/triboelectric nanogenerators (PTNGs) have become the research frontier in many cutting-edge applications, which open up promising possibilities for broad prospects. Fiber materials are the ideal candidate for constructing high-performance PTNGs owing to the compelling features of lightweight, programmable structure, favorable softness, and brilliant breathability. To this end, working mechanisms, material selections, structural designs and fabrication methods of fiber constructed PTNGs are comprehensively presented. An in-depth analysis of emerging applications ranging from intelligent clothing, smart home, and personalized medicine to artificial intelligence is thoughtfully demonstrated. Furthermore, the current problems and potential challenges that hinder their large-scale commercial applications are systematically discussed, laying emphasis on the future development direction of fiber constructed PTNGs. It is expected that this review will supply the audience with some universal strategies and fresh ideas to conduct deep research on fiber constructed PTNGs toward better performance. 相似文献
864.
Guo Tian;Weili Deng;Tao Yang;Jieling Zhang;Tianpei Xu;Da Xiong;Boling Lan;Shenglong Wang;Yue Sun;Yong Ao;Longchao Huang;Yang Liu;Xuelan Li;Long Jin;Weiqing Yang; 《Advanced materials (Deerfield Beach, Fla.)》2024,36(26):2313612
Continuous monitoring of blood pressure (BP) and multiparametric analysis of cardiac functions are crucial for the early diagnosis and therapy of cardiovascular diseases. However, existing monitoring approaches often suffer from bulky and intrusive apparatus, cumbersome testing procedures, and challenging data processing, hampering their applications in continuous monitoring. Here, a heterogeneously hierarchical piezoelectric composite is introduced for wearable continuous BP and cardiac function monitoring, overcoming the rigidity of ceramic and the insensitivity of polymer. By optimizing the hierarchical structure and components of the composite, the developed piezoelectric sensor delivers impressive performances, ensuring continuous and accurate monitoring of BP at Grade A level. Furthermore, the hemodynamic parameters are extracted from the detected signals, such as local pulse wave velocity, cardiac output, and stroke volume, all of which are in alignment with clinical results. Finally, the all-day tracking of cardiac function parameters validates the reliability and stability of the developed sensor, highlighting its potential for personalized healthcare systems, particularly in early diagnosis and timely intervention of cardiovascular disease. 相似文献
865.
Minhyeok Ha Jihun Lee Yongbeom Cho Minwoo Lee Hyunwoo Baek Jungmin Lee Jongmin Seo Sejoon Chun Kisoo Kim Jin-Gyun Kim Won Gu Lee 《Advanced Materials Technologies》2024,9(2):2301404
The pandemic coincided with rapid advancements in virtual reality (VR) and mixed reality (MR) in healthcare. The idea of virtually replicating the real world and its associated experiences has garnered significant attention under the newly coined term “metaverse.” The metaverse serves as a communication platform that integrates physical and virtual experiences. However, the lack of physical interaction between users and virtual environments remains an obstacle. This study introduces a hybrid upper-arm-geared exoskeleton system that combines an anatomical digital-twin model with tangible VR torque feedback and an MR remote healthcare monitoring in a musculoskeletal interface device format. The device employs a dual epicyclic geared motor actuator capable of exerting torque feedback. It derived torque profiles that simulate physical interactions with hysteretic damping in the virtual environment. An anatomical digital twin model is also incorporated into the fabricated device in an MR format and assessed the device's performance using electromyogram and thermographic sensors. In addition, it evaluated haptic fidelity and versatility as an immersive metaverse wearable and performed support vector machine-based analysis for motion feature classification. It believes this approach has the potential to be highly beneficial for providing tangible metaverse feedback and communication combined with a human-informed digital-twin model for remote healthcare monitoring in the postpandemic era. 相似文献
866.
Jia Heng Teoh Anbu Mozhi Vishnu Sunil Sook Muay Tay Jerry Fuh Chi-Hwa Wang 《Advanced functional materials》2021,31(48):2105932
Considering the variations in burns depending on the circumstances that caused them, the need for personalized medicine and care for burn victims is vital to ensure that optimal treatment is provided. With the level of accuracy and customization that 3D printing brings as a technology, there is potential in its use to fabricate wound dressings that can provide better treatment for burn patients, provided that the material of choice has good printability and can be customized while facilitating wound healing. In this study, the versatility of chitosan methacrylate as said material to be used to fabricate customizable wound dressings via 3D printing is investigated. Synthesized chitosan methacrylate is evaluated to be printable, biodegradable, and biocompatible during wound healing. Various drugs relevant to the treatment of burns are then loaded and different multimaterial wound dressing designs containing different dosages are fabricated via 3D printing. The incorporation of said drugs does not significantly affect the printability of chitosan methacrylate, and the incorporation of antimicrobial agents significantly improves its antimicrobial capabilities. Through in vivo models, these variations in wound dressing designs have good wound healing properties and do not cause any adverse effects in the process. 相似文献
867.
868.
The cooling effect of personalized ventilation systems Personalized ventilation (PV) can improve thermal comfort and inhaled air quality by supplying air to each workstation separately. This study investigates the impact of PV on the thermal state of the users under summer boundary conditions. Two approaches to evaluating the cooling effect of PV were investigated, based on equivalent temperature and based on thermal sensation. Both approaches implemented measured and simulated values of the cooling effect of PV. Before conducting the simulations, the numerical model was first validated against measured data collected in a climate chamber equipped with a thermal manikin. Results indicated that the thermal sensation approach can be more suitable for evaluating the cooling effect of PV due to the complex physiological factors it considers. 相似文献
869.
Ziming Wang Jie An Jinhui Nie Jianjun Luo Jiajia Shao Tao Jiang Baodong Chen Wei Tang Zhong Lin Wang 《Advanced materials (Deerfield Beach, Fla.)》2020,32(32):2001466
As the dominant component for precise motion measurement, angle sensors play a vital role in robotics, machine control, and personalized rehabilitation. Various forms of angle sensors have been developed and optimized over the past decades, but none of them would function without an electric power. Here, a highly sensitive triboelectric self-powered angle sensor (SPAS) exhibiting the highest resolution (2.03 nano-radian) after a comprehensive optimization is reported. In addition, the SPAS holds merits of light weight and thin thickness, which enables its extensive integrated applications with minimized energy consumption: a palletizing robotic arm equipped with the SPAS can precisely reproduce traditional Chinese calligraphy via angular data it collects. In addition, the SPAS can be assembled in a medicare brace to record the flexion/extension of joints, which may benefit personalized orthopedic recuperation. The SPAS paves a new approach for applications in the emerging fields of robotics, sensing, personalized medicare, and artificial intelligence. 相似文献
870.