Results 81 to 90 of about 523,825 (238)

Backscatter Communications over Ambient OFDM Signals using Null Subcarriers [PDF]

, 2018
Käsikirjoitus avataan, kun artikkeli julkaistu.In recent years, ambient backscatter communications have gained a lot of interest as a promising enabling technology for Internet-of-Things and green communications.
Li, Geoffrey, Karim G. Seddik, Pan, Miao, Jäntti, Riku, Mohamed A. ElMossallamy, Zhu Han, ElMossalmy, Mohammed, Geoffrey Ye Li, Seddik, Karim, Han, Zhu, Riku Jantti, Miao Pan   +11 more
core   +1 more source

Neuromorphic Optical Tracking and Imaging of Randomly Moving Targets Through Dynamic Dense Scattering Media

Advanced Science, EarlyView.
Vision begins not with images but with change: the retina fires only when something moves, handing the brain a stream of spikes. A neuromorphic imaging system adopts the same strategy—an event sensor that sees like the retina, a spiking network that thinks like the brain—to track and reconstruct fully randomly moving targets through tissue (phantom ...
Ning Zhang, Arto Nurmikko
wiley   +1 more source

Grain Boundary Structure Ordering via Electroshock Treatment Enhances Strength‐Ductility Synergy

Advanced Science, EarlyView.
Electroshock treatment triggers atomic rearrangement, transforming disordered grain boundaries into ordered states without inducing recrystallization. This grain boundary ordering effectively relieves strain concentration and strengthens boundaries, enabling a simultaneous improvement in both strength and ductility.
Jiancheng Chen, Feng Wang, Dongsheng Qian, Huiling Wang, Jinsong Wu, Mingwang Fu, Lin Hua   +6 more
wiley   +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

Backscatter-NOMA: A Symbiotic System of Cellular and Internet-of-Things Networks

IEEE Access, 2019
Non-orthogonal multiple access (NOMA) is envisioned as a key technology to enhance the spectrum efficiency for 5G cellular networks. Meanwhile, ambient backscatter communication is a promising solution to the Internet of Things (IoT), due to its high ...
Qianqian Zhang, Lin Zhang, Ying-Chang Liang, Pooi-Yuen Kam   +3 more
doaj   +1 more source

Correlated Polymer‐Proton Hopping Enables Water‐Independent Fast Proton Transport in Poly(Ionic Liquid) Membranes

Advanced Science, EarlyView.
A polymer chain in motion: backbone, ring, and counterion dynamics interlock across timescales to relay protons through poly(ionic liquid) membranes. ABSTRACT Polymer electrolyte membranes composed of ionic liquids (IL), capable of conducting protons efficiently at elevated temperatures, without external humidification, could transform fuel cell ...
Keenan Smith, Antonela Gallastegui, Zixuan Yu, Yuliana Pairetti, Andrew Seel, Jacques Ollivier, Victoria Garcia Sakai, Bob C. Schroeder, Maria Forsyth, Aurelie Gueguen, David Mecerreyes, Fabrizia Foglia   +11 more
wiley   +1 more source

Coherent detector for pseudo-FSK backscatter under ambient constant envelope illumination

, 2018
Summarization: This work studies ambient backscatter, where the tag utilizes a frequency-shifted form of on-off keying (OOK), which may be coined as pseudo-frequency shift keying (pseudo-FSK).
Alevizos Panagiotis(http://users.isc.tuc.gr/~palevizos), Bletsas Aggelos(http://users.isc.tuc.gr/~abletsas), Μπλετσας Αγγελος(http://users.isc.tuc.gr/~abletsas), Αλεβιζος Παναγιωτης(http://users.isc.tuc.gr/~palevizos), Vougioukas Georgios(http://users.isc.tuc.gr/~gevougioukas), Βουγιουκας Γεωργιος(http://users.isc.tuc.gr/~gevougioukas)   +5 more
core   +1 more source

Synthesis‐Dependent Grain Boundary Density Governs Low‐Temperature Lithium Diffusion in Single‐Crystal NCM Cathodes

Advanced Science, EarlyView.
The relationship between synthesis‐dependent crystallization behavior, internal grain‐boundary density, and intrinsic lithium diffusion kinetics in single‐crystal mid‐Ni NCM cathodes is elucidated, providing practical design insights for advanced cathode materials.
Yeong Beom Kim, Jaewon Lee, Jihong Park, Seunghyeon Chae, Dohyung Kim, Gigap Han, Hyeongi Song, Jihye Jang, Jihoon Choi, Sang Mun Jeong, Yun Chan Kang, Gi Dae Park   +11 more
wiley   +1 more source

Rapid Cooling After Device Annealing Suppresses Interface Losses in Cu2ZnSnS4 Solar Cells Enabling High Efficiency and Stability

Advanced Science, EarlyView.
Rapid cooling after device annealing regulates the CdS/CZTS heterojunction and Mo/CZTS back contact, suppressing interfacial recombination and modifying the interfacial MoS2 layer, thereby enabling a 15.9% indoor PCE in pure‐sulfide CZTS solar cells.
Achmad Nasyori, Mati Danilson, Idil Mengü, Maris Pilvet, Jüri Krustok, Reelika Kaupmees, Valdek Mikli, Raavo Josepson, Yuancai Gong, Akhil Alexander, Shreyash S. Hadke, Aurelian Catalin Galca, Paola Vivo, Lydia Helena Wong, Thomas Unold, Maarja Grossberg‐Kuusk, Marit Kauk‐Kuusik   +16 more
wiley   +1 more source

Analysis of factors affecting the performance of multi-longitudinal-mode Doppler lidar based on quadri-channel Mach–Zehnder interferometer

Discover Applied Sciences
A multimode Doppler lidar based on a quadri-channel Mach–Zehnder interferometer (QMZI) is investigated in this study. The effects of laser frequency pulling, ambient temperature variation, low-frequency vibration, phase defects, atmospheric temperature ...
Xiaowei Xia, Peng Zhuang, Chenbo Xie, Fahua Shen, Yun Jiang   +4 more
doaj   +1 more source