Results 81 to 90 of about 1,363 (214)

Ultra‐Fast and Energy‐Efficient PZT Optical Tunable Delay Lines for Programmable Photonic Systems

Laser &Photonics Reviews, EarlyView.
Thin‐film PZT enables optical tunable delay lines that simultaneously offer sub‐nanosecond switching, low propagation loss, and zero‐static‐power programmability. A five‐bit on‐chip delay line provides a maximum delay of 387.5 ps with a resolution of 12.5 ps, while reconfigurable MZI splitting ratios further enable non‐volatile optical arbitrary ...
Cunyu Shi, Chenlei Li, Wei Chen, Shengjie Tang, Tao Shu, Haojie Zhu, Haorui Liu, Yueyang Zhang, Long Zhang, William Shieh, Feng Qiu, Daoxin Dai   +11 more
wiley   +1 more source

A MFR Work Modes Recognition Method Based on Dual-Scale Feature Extraction

Remote Sensing
Multi-function radar (MFR) work modes recognition is an important research component of the electronic reconnaissance field. When facing MFR systems equipped with complex mode-waveform mapping relationships and flexible beam scanning techniques, the ...
Zhiyuan Li, Xuan Fu, Chengjian Mo, Jianlong Tang, Ronghua Guo, Wenbo Li   +5 more
doaj   +1 more source

Nitrogen‐Doped GeTeS Ovonic Threshold Switching Selector With Optimized Performance Trade‐Off for 1S–1R Phase‐Change Memory

Small, EarlyView.
This study introduced a Ge‐Te‐S co‐sputtering process to resolve the performance trade‐off between GeTe and GeS in OTS selector devices, and improved device durability through nitrogen doping. Furthermore, in a 1S‐1R structure incorporating phase‐change memory devices, it simultaneously achieved excellent thermal stability, durability, high‐speed ...
Min Su Kang, Jong Min Joo, Jun Young Choi, Ji Eun Park, Dong Hyun Kim, Jin Suk Oh, Tae Geun Kim   +6 more
wiley   +1 more source

Probabilistic estimation of reliable sensor spacing for wire break detection in prestressed concrete using acoustic emission technique

Structural Concrete, EarlyView.
Abstract The acoustic emission (AE) technique has proven to be an effective method for detecting individual wire breaks in prestressed concrete structures affected by stress corrosion cracking (SCC). However, despite its widespread application, the quantitative assessment of AE monitoring reliability and optimal sensor placement remains unresolved ...
Max Fiedler, Steffen Marx
wiley   +1 more source

An Active Deception Combined Jamming Identification Method Based on Waveform Modulation

Signals
Jamming pattern identification is a crucial prerequisite for countering jamming. Combined jamming exhibits complex structures and diverse forms, making it difficult for traditional identification methods to extract suitable and stable features for ...
Yun Zhou, Fulai Wang, Nan Jiang, Zhanling Wang, Chen Pang, Lei Zhang, Yongzhen Li, Ping Wang   +7 more
doaj   +1 more source

Portable Radar for Noncontact Heart Rate Monitoring and Estrus Detection in Dairy Cows

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
This study introduces a portable radar system for real‐time monitoring of respiratory and heart rates in dairy cows. It uses millimeter‐wave Frequency Modulated Continuous Wave (FMCW) radar to perform noncontact physiological sensing, reducing behavioral disturbance. The radar system's design prioritizes portability, cost‐effectiveness, and robustness,
Yingxiu Li, Ranran Wang, Fuyang Tian, Yudao Li, Zhuolin Wang, Yuxin Yu, Liping Ma, Xin Lu   +7 more
wiley   +1 more source

Multi-Function Working Mode Recognition Based on Multi-Feature Joint Learning

Remote Sensing
With advancements in phased array and cognitive technologies, the adaptability of modern multifunction radars (MFRs) has significantly improved, enabling greater flexibility in waveform parameters and beam scheduling.
Lei Liu, Minghua Wu, Dongyang Cheng, Wei Wang   +3 more
doaj   +1 more source

A perspective on automated rapid eye movement sleep assessment

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Rapid eye movement sleep is associated with distinct changes in various biomedical signals that can be easily captured during sleep, lending themselves to automated sleep staging using machine learning systems. Here, we provide a perspective on the critical characteristics of biomedical signals associated with rapid eye movement sleep and how ...
Mathias Baumert, Huy Phan
wiley   +1 more source

Imidazole‐Extended Non‐Fullerene Acceptors With Tunable Crystallinity for Ultrasensitive, Ultrafast Near‐Infrared Organic Photodetectors

Aggregate, Volume 7, Issue 8, August 2026.
A two‐dimensional extended imidazole acceptor‐based organic photodetector delivers a lower dark current of 2.54 × 10−12 A/cm−2, peak detectivity of 1.08 × 1013 Jones, the widest linear dynamic range of 167.8 dB, and ultrafast response times of 307/319 ns. ABSTRACT Emerging optoelectronic tasks such as night‐vision imaging and wearable health monitoring
Chengwei Shan, Zihao Li, Han Gao, Yuang Fu, Zhaojin Wang, Xinhui Lu, Xianyong Zhou, Bin‐Bin Yu, Philip C. Y. Chow, Aung Ko Ko Kyaw, Chang Liu, Tianshuo Zhao, Hanjian Lai   +12 more
wiley   +1 more source

Application of Artificial Neural Computation in Topex Waveform Data [PDF]

, 2009
Using the TOPEX radar altimeter for land cover studies has been of great interest due to the TOPEX near global coverage and its consistent availability of waveform data for about one and a half decades from 1992 to 2005.
Franklin W. Schwartz, Daoqin Tong, Bo Zhang   +2 more
core   +1 more source