Results 71 to 80 of about 2,628 (189)

Adaptive intra‐pulse interference waveform generation technique based on Convolutional Neural Network—Deep Neural Network with global priority information of radar signal

IET Radar, Sonar & Navigation, 2023
To adapt to the complex and changeable electromagnetic environment of radar detection, improve the jamming effect on frequency‐agile radar and low probability of intercept radar, and solve the problem of poor jamming effect caused by intra‐pulse jamming ...
Yilin Jiang, Xi Shang, Lisong Guan, Jinxin Li   +3 more
doaj   +1 more source

Monitoring and assessment for obstructive sleep apnea

FlexMat, EarlyView.
This review systematically classifies Obstructive Sleep Apnea (OSA) monitoring indicators into three categories: physical, biochemical, and electrophysiological indicators, and lists several methods for each category. Abstract Obstructive sleep apnea (OSA) is a common chronic sleep‐disordered breathing disease characterized by recurrent upper airway ...
Yaowen Xu, Feifei Lin, Shujiao Chen, Zhen You, Shujing Zhu, Weiwei Zhao, Qiang Zhao   +6 more
wiley   +1 more source

Radar Waveform Strategy Based on Game Theory [PDF]

Radioengineering, 2019
In this paper, we proposed two waveform design methods based on game theory to address the problem of radar detection performance degradation in electronic warfare. Since radar and jammer are completely hostile, their interaction is modeled as two-person
H. L. Wang, W. Li, H. Wang, J. Y. Xu, J. L. Zhao   +4 more
doaj  

Materials and Music: Selective Imperfection as a Generative Framework for Analysis, Creativity and Discovery

Interdisciplinary Materials, EarlyView.
Vibrations in matter, from spider webs to molecules, water to flames, share a grammar with music. We propose that creativity emerges when constraints force expansion beyond existing possibilities. Selective imperfection restores balance, enabling invention.
Markus J. Buehler
wiley   +1 more source

Thin‐film lithium niobate photonics: Frontiers in millimeter‐wave and terahertz generation and integrated applications

InfoScience, EarlyView.
With the advancement of 6G communications, high‐precision radar, and advanced imaging technologies, there is a growing demand for compact, high‐performance light sources capable of generating high‐frequency radio waves (millimeter‐wave and terahertz waves). This article systematically introduces how to efficiently generate these high‐frequency waves on
Jianfeng Xiong, Zhenyu Wang, Xu Li, Guo Tang, Sizhe Wang, Jiyuan Huang, Guochao Wang, Shuhua Yan, Wenzhao Sun   +8 more
wiley   +1 more source

Feasibility analysis of non-orthogonal waveforms for multiple input multiple output passive radar application

The Journal of Engineering, 2019
New non-orthogonal multiple access technology is proposed with the development of 5G, which is expected to support higher spectrum efficiency and massive terminal access, it enables the communication system to achieve better bit error rate performance ...
Qing Wang, Tong Li, Tongdong Dou, Weifeng Zhu   +3 more
doaj   +1 more source

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

Closed-Form Waveform Design for MIMO Radar Transmit Beampattern Synthesis via Integral Equality

IEEE Access, 2020
Recently, due to the adequate use of waveform diversity, MIMO technology has been widely adopted, resulting in the waveform design for MIMO radar beampattern synthesis becoming a hot issue. However, most previous works regarding this problem optimize the
Yezi Ma, Ping Wei, Huaguo Zhang, Yan Pan
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