Results 71 to 80 of about 4,757,560 (195)

Sparse Recovery Optimization in Wireless Sensor Networks with a Sub-Nyquist Sampling Rate

Sensors, 2015
Compressive sensing (CS) is a new technology in digital signal processing capable of high-resolution capture of physical signals from few measurements, which promises impressive improvements in the field of wireless sensor networks (WSNs).
Davide Brunelli, Carlo Caione
doaj   +1 more source

Synergistic Additive and Bulky Cation Engineering via a Sequential Vacuum Dry‐Dipping Process for Tin Perovskite Solar Cells

Advanced Science, EarlyView.
A spin‐coating‐free sequential blade–dipping process is developed for efficient tin perovskite solar cells. Amorphous SnI2 templates are blade‐coated and vacuum‐dried, followed by a vertical dipping conversion. Enhanced by a synergistic additive matrix and bifunctional BATo cation, the resulting devices achieve a benchmark power conversion efficiency ...
Chun‐Hsiao Kuan, Xianyuan Jiang, Yun‐Sheng Shih, Chien‐Ling Ting, Po‐Kai Kang, Yue Lu, Sung‐Fu Hung, Hsin‐Lung Chen, Shiang Lan, Guan‐Ruei Chen, Jhih‐Min Lin, Chun‐Jen Su, Wei‐Ru Wu, Eric Wei‐Guang Diau   +13 more
wiley   +1 more source

Wideband spectrum sensing using step-sampling based on the multi-path nyquist folding receiver

Defence Technology
Wideband spectrum sensing with a high-speed analog-digital converter (ADC) presents a challenge for practical systems. The Nyquist folding receiver (NYFR) is a promising scheme for achieving cost-effective real-time spectrum sensing, which is subject to ...
Kai-lun Tian, Kai-li Jiang, Sen Cao, Jian Gao, Ying Xiong, Bin Tang, Xu-ying Zhang, Yan-fei Li   +7 more
doaj   +1 more source

Dual‐Responsive Hydrogels Integrate Bioelectrical Stimulation and Piezo‐Photocatalysis for Regenerative Treatment of Infected Wounds

Advanced Science, EarlyView.
A wireless, dual‐responsive hydrogel (PVA/(PVDF‐TrFE)/BiOClBr@PDA) is developed to promote efficient regeneration of infected wounds by integrating piezoelectric stimulation with piezo‐photocatalytic pathways. Under simultaneous light and ultrasonic stimulation, the hydrogel generates therapeutic electrical cues and reactive oxygen species, disrupting ...
Baoying Dai, Wenxuan Qie, Xiaoye Li, Jingben Zheng, Ao He, Heng Dong, Jiangjiang Yan, Hao Zhang, Ziheng Pan, Hang Yin, Chuyi Zhou, Rui Kong, Hao Wang, Binghan Dai, Yannan Xie, Zhiqun Lin   +15 more
wiley   +1 more source

Color and Vector Flow Imaging in Parallel Ultrasound With Sub-Nyquist Sampling

, 2018
International audienceRF acquisition with a high-performance multichannel ultrasound system generates massive data sets in short periods of time, especially in "ultrafast" ultrasound when digital receive beamforming is required.
Porée, Jonathan, Garcia, Damien, Damien Garcia, Craig Madiena, Julia Faurie, Faurie, Julia, Madiena, Craig, Jonathan Poree   +7 more
core   +1 more source

From Sensing Mechanisms to System Co‐Design: Graphene‐Based Sensors and Readout Circuits

Advanced Science, EarlyView.
This review establishes a unified PS–EQ–RF framework linking graphene sensing mechanisms, native electrical outputs, and output‐specific readout circuits. Voltage‐, current‐, resistance‐, and capacitance‐type sensing systems are systematically classified to guide architecture selection, low‐noise design, system co‐design, and practical integration ...
Jinduo Zhang, Meng Chen, Guanchen Li, Ruifeng Liu, Yingxin Wang, Ziran Zhao   +5 more
wiley   +1 more source

Ultrasonic signal compressive detection with sub-Nyquist sampling rate

, 2012
195-199This study presents a compressed sensing (CS) based sampling approach for repetitive ultrasonic signal. Proposed system considers recovering ultrasonic signal with high equivalent sampling frequency from samples captured using analog-to ...
Wang, Li, Zhao, Yijiu, Zhuang, Xiaoyan, Wang, Houjun, Dai, Zhijian   +4 more
core  

Scalable Multilayer PTFE‐Reinforced Membranes for Durable, High‐Current‐Density Hydroxide Exchange Membrane Water Electrolysis in Dilute Alkali

Advanced Science, EarlyView.
Low‐Tg HEMs are designed to improve membrane‐electrode adhesion by promoting intimate contact with catalyst layers. After hydration, the membrane develops a hydrogel‐like network that supports water uptake and ion transport while retaining mechanical robustness.
Zhiwei Ren, Yun Zhao, Rui Zhang, Tao Wei, Yingran Zhu, Yangkai Han, Tongzhou Li, Haitao Zhang, Zhigang Shao   +8 more
wiley   +1 more source

Sub-nyquist audio fingerprinting for music recognition

, 2010
In recent years, Compressive Sampling (CS), a new research topic in signal processing, has piqued interest of a wide range of researchers in different fields. In this paper, we present a sub-Nyquist Audio Fingerprinting (AF) system for music recognition,
Kaichun Chang, Solon Pissis, Jyh-Shing Jang, Chang, Kaichun K., Iliopoulos, C.S., Jang, Jyh-Shing R., Costas Iliopoulos, Pissis, Solon P.; id_orcid   +7 more
core   +1 more source

Ultrathin 2D In2O3 Nanosheets Confining Cu Single Atoms Synergized With Oxygen Vacancies for High Selectivity of Photocatalytic Reduction of CO2 to CO

Advanced Science, EarlyView.
In this work, we constructed an ultrathin two‐dimensional (2D) In2O3 nanosheet (In2O3‐Ns) structure based on oxygen vacancies (OV)‐rich defects and low crystallinity to anchor Cu single atoms (Cu SAs) and synthesized Cu/In2O3‐Ns photocatalysts. ABSTRACT In this work, we constructed an ultrathin two‐dimensional (2D) In2O3 nanosheet (In2O3‐Ns) structure ...
Yueying Yang, Xuan Xiang, Jiali Ren, Ying Bian, Xinyu Wang, Xiaoyang Lu, Yanjun Xue, Porun Liu, Cheng‐Hao Chuang, Xiaoli Zhang, Jian Tian   +10 more
wiley   +1 more source