Results 61 to 70 of about 113,850 (277)

Multiscale Decomposition Prediction of Propagation Loss for EM Waves in Marine Evaporation Duct Using Deep Learning

Journal of Marine Science and Engineering, 2022
A tropospheric duct (TD) is an anomalous atmospheric refraction structure in marine environments that seriously interferes with the propagation path and range of electromagnetic (EM) waves, resulting in serious influence on the normal operation of radar.
Hanjie Ji, Bo Yin, Jinpeng Zhang, Yushi Zhang, Qingliang Li, Chunzhi Hou   +5 more
doaj   +1 more source

Advances in Halide Perovskites for Photon Radiation Detectors

Advanced Materials Technologies, EarlyView.
This work highlights recent progress in perovskite‐based photon radiation detectors, covering organic–inorganic hybrid, inorganic, lead‐free double, and vacancy‐ordered halide perovskites. Their detection performance is compared, material‐specific advantages and challenges are examined, and provides insight into current limitations and future ...
Liangling Wang, Jieqi Wang, Xiaojun Cui, Carsten Ronning   +3 more
wiley   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Features of control of characteristics of radio engineering devices in the multi-wave mode of operation

MATEC Web of Conferences, 2018
In multi-wave elements of radio devices at frequencies, 1,2,..., 10 times the operating frequency, conditions arise for the propagation of several types of waves. This leads to the dependence of the characteristics of electronic devices and, consequently,
Pichugin Vladimir N.
doaj   +1 more source

DETERMINATION OF ELF WAVE CHARACTERISTICS MOST STRONGLY REACTING TO MINOR CHANGES OF IONOSPHERIC ELECTRON DENSITY IN A HIGH-LATITUDE REGION

Solar-Terrestrial Physics, 2019
In this paper, we use numerical experiment methods to address the problem of determining characteristics of ELF (0.3–3 kHz) electromagnetic waves recorded in the surface layer and providing the maximum amount of information about the Earth–ionosphere ...
Akhmetov O.I., Mingalev I.V., Mingalev O.V., Suvorova Z.V., Belakhovsky V.B., Chernyakov S.M.   +5 more
doaj   +1 more source

Coherent generation of the terrestrial kilometric radiation by nonlinear beatings between electrostatic waves [PDF]

, 1979
The propagation of electrostatic plasma waves in an inhomogeneous and magnetized plasma was studied. These waves, which are driven unstable by auroral beams of electrons, are shown to suffer a further geometrical amplification while they propagate ...
Pellat, R., Roux, A.
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Analysis of Attenuation Characteristics of Polar VLF Electromagnetic Wave Propagation across Ice Layer

水下无人系统学报
Very low frequency(VLF) electromagnetic wave provides a reliable method for cross-medium communication in polar sea environments due to its ability to penetrate seawater.
Jiayu ZHANG, Shimin FENG, Gaoqi DOU, Chenpeng DAI, Zhen WANG, Hao WANG   +5 more
doaj   +1 more source

An Overview of Recent Advances in the Iterative Analysis of Coupled Models for Wave Propagation

Journal of Applied Mathematics, 2014
Wave propagation problems can be solved using a variety of methods. However, in many cases, the joint use of different numerical procedures to model different parts of the problem may be advisable and strategies to perform the coupling between them must ...
D. Soares, L. Godinho
doaj   +1 more source

Quelques aspects de la propagation des ondes radioélectriques

Territoire en Mouvement, 2012
This paper deals with the scattering of electromagnetic wave in space, especially for radio frequency waves used for broadcasting, TV and telecommunication devices.
Bernard Démoulin
doaj   +1 more source