Results 201 to 210 of about 22,621 (259)

Temperature‐Driven Emission Redistribution of Yb2+ in SrB4O7 Enables Highly Sensitive Optical Thermometry Supported by Multiple Linear Regression

Advanced Science, EarlyView.
A novel optical thermometer exploits the rare UV emission of Yb2+ ions in a SrB4O7 host, enabling highly sensitive, non‐contact temperature measurements from 80 to 420 K. The applied multiple linear regression (MLR) analysis results in a multiple increase in the resulting temperature sensitivity.
Fang Zhao, Teng Zheng, Przemysław Woźny, Miguel A. Hernández‐Rodríguez, Shiqing Xu, Inocencio R. Martín, Marcin Runowski   +6 more
wiley   +1 more source

Hybrid equivalent circuit-deep neural network design of optically transparent metasurface with microwave RCS reduction. [PDF]

iScience
Si L, Ma T, Dong L, Niu R, Dang C, Bao X, Zhu K, Sun H, Zhu W.   +8 more
europepmc   +1 more source

Stress‐to‐Light Conversion in an Earth‐Abundant Oxide Semiconductor

Advanced Science, EarlyView.
Stress‐to‐light conversion in solids represents a unique photonic functionality, yet it has never been realized in a chemically simple and sustainable material. Here, we show that sustainable semiconductor ZnO exhibits strong near‐infrared (NIR) luminescence under elastic stress when defect‐engineered to stabilize the p‐type state.
Tomoki Uchiyama, Koki Otonari, Reona Omori, Guangfa Yang, Eiji Nishibori, Ying Chen, Xu‐Guang Zheng, Chao‐Nan Xu   +7 more
wiley   +1 more source

Model-Data Hybrid-Driven Wideband Channel Estimation for Beamspace Massive MIMO Systems. [PDF]

Entropy (Basel)
Nie Y, Ma Z, Jing L.
europepmc   +1 more source

Dipole‐Manipulated Built‐In Electric Field Enables Ultrafast Charge Separation in Perylene Diimide Polymers for Photoelectrochemical Water Splitting

Advanced Science, EarlyView.
Molecular dipole engineering in dendritic perylene diimide polymers through nitrogen‐rich heterocyclic linkers amplifies the built‐in electric field, enabling sub‐picosecond charge separation and efficient multi‐electron accumulation. This structure–dynamics–performance relationship establishes a versatile design strategy for high‐performance organic ...
Ying‐Xin Qiao, Zicong Situ, Yi‐Jing Chen, Shuo‐Xiang Liu, Jing‐Lan Zhang, Xingqing Li, Luo‐Han Xie, Si‐Hang Xie, Qing‐Xiao Tong, Andong Xia, Zhuoran Kuang, Jing‐Xin Jian   +11 more
wiley   +1 more source

An Optically Transparent Water-Based Metamaterial Absorber for Ultra-Broadband EMI Shielding in Coal Mines. [PDF]

Adv Sci (Weinh)
Huang X, Gao L, Xu Y, Wang Y, Hou W, Luo Y.   +5 more
europepmc   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

Design of a Low-Cost Flat E-Band Down-Converter with Variable Conversion Gain. [PDF]

Sensors (Basel)
Harifi-Mood M, Dashti Ardakani M, Hammou D, Moldovan E, Hosein B, Tatu SO.   +5 more
europepmc   +1 more source

Fractal-based compact quad-port THz MIMO antenna with ultra-wideband and high isolation for 6G and TWPAN applications. [PDF]

Sci Rep
Chinnamuthu A, Iruthayanathan N, Ramprabhu S, Arjunan RV, Shailesh T.   +4 more
europepmc   +1 more source

Direct Position Determination of Wideband Source over Multipath Environment: Combining Taylor Expansion and Subspace Data Fusion in the Cross-Spectrum Domain. [PDF]

Sensors (Basel)
Chai H, Yin X, Hu H, Zhang X.
europepmc   +1 more source