Results 81 to 90 of about 2,964,810 (286)

Constructions of Low-Hit-Zone Frequency-Hopping Sequence Set With Strictly Optimal Periodic Partial Hamming Correlation

IEEE Access
Frequency-hopping technology has been used widely in wireless communications, especially in military communications and in civil mobile communications.
Chun Xie, Changyuan Wang
doaj   +1 more source

Modulation Recognition of Frequency Hopping Signal under Interference Based on Improved YOLOv5s [PDF]

Zhengzhou Daxue xuebao. Gongxue ban
In complex electromagnetic environments, interference signals can severely degrade the detection and recognition performance of frequency-hopping signals. To address issues of false detection, missed detection, and over-detection in traditional methods,
ZHANG Haibin, WEI Hongji, WANG Chao, XIANG Changbo, YANG Mingyang, LI Xiaolong   +5 more
doaj   +1 more source

Organic Materials of Tomorrow: Horizons of Artificial Intelligence

Advanced Materials, EarlyView.
This review examines machine learning techniques accelerating the discovery of organic semiconductors by linking molecular structure to properties. Key methods include graph neural networks, generative models, and active learning. Applications to organic photovoltaics demonstrate practical impact.
Harold Mena, J. Terence Blaskovits, Kun‐Han Lin, Denis Andrienko   +3 more
wiley   +1 more source

History of the Hopping family in England and genealogy of the John Hopping family in America /

, 1952
Includes indexes.Supplement by L. M.
Hopping, Louis M., 1900-, Hopping, Edward Stuart, b. 1871.   +1 more
core  

New Constructions of One-Coincidence Sequence Sets over Integer Rings

Mathematics
In this paper, we introduce new constructions of one-coincidence frequency-hopping sequence (OC-FHS) sets over integer rings. These OC-FHSs are designed to minimize interference in frequency-hopping multiple access (FHMA) systems, which are widely used ...
Jin-Ho Chung, Daehan Ahn, Daehwan Kim
doaj   +1 more source

Why Is the Mechanism Underlying the Chiral‐Induced Selectivity Effect Still Challenging?

Advanced Materials, EarlyView.
The chiral‐induced spin selectivity (CISS) effect is observed in many experimental configurations and for different materials. However, there are theoretical challenges in attempting to explain those results. A qualitative framework for explaining all the results is presented.
Ron Naaman, Yossi Paltiel
wiley   +1 more source

Research of adaptive frequency hopping technology in WIA-PA industrial wireless network [PDF]

, 2013
WIA-PA (Wireless Networks for Industrial Automation - Process Automation) is IEC international standard. In order to solve the primary problem of wireless network in industrial applications, i.e.
Shuai Liu, Yang YT(杨雨沱), Li SM(李世明), Liang W(梁炜), Yutuo Yang, Wei Liang, Liu S(刘帅), Shiming Li   +7 more
core   +1 more source

AK-MADDPG-Based Antijamming Strategy Design Method for Frequency Agile Radar

Sensors
Frequency agility refers to the rapid variation of the carrier frequency of adjacent pulses, which is an effective radar active antijamming method against frequency spot jamming.
Zhidong Zhu, Xiaoying Deng, Jian Dong, Cheng Feng, Xiongjun Fu   +4 more
doaj   +1 more source

Flexible Frequency-Hopping Microwave Generation by Dynamic Control of Optically Injected Semiconductor Laser

IEEE Photonics Journal, 2016
Under proper optical injection, period-one (P1) dynamics of an optically injected semiconductor laser can be excited by undamping the relaxation resonance of the semiconductor through Hopf bifurcation.
Pei Zhou, Fangzheng Zhang, Xingwei Ye, Qingshui Guo, Shilong Pan   +4 more
doaj   +1 more source

Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells

Advanced Materials, EarlyView.
Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang, Christopher Wöpke, Toni Seiler, Jared Faisst, Mathias List, Meike Kuhn, Bekcy Joseph, Alexander Ehm, Dietrich R. T. Zahn, Yana Vaynzof, Eva M. Herzig, Roderick C. I. Mackenzie, Uli Würfel, Maria Saladina, Carsten Deibel   +14 more
wiley   +1 more source