Results 21 to 30 of about 9,704,193 (294)
Three-Dimensional Near-Field to Far-Field Transformation for Radar Cross Section Estimation of Elongated Targets via Subdimensional Hybrid Conversion [PDF]
Journal of Electromagnetic Engineering and Science, 2022 Image-based (IB) near-field to far-field transformation (NFFFT) is a useful method for the valid prediction of radar cross sections (RCSs) from short-range monostatic measurements.
Jeong-Kyu Kim +3 more
doaj +1 more source
Formation Mechanism of Sub-Micron Pharmaceutical Composite Particles derived from Far- and Near Field Raman microscopy [PDF]
, 2020 Surface-enhanced Raman spectroscopy (SERS) and confocal Raman microscopy are applied to investigate the structure and the molecular arrangement of a sub-micron pharmaceutical organic composite.
Yan, Busby +3 more
core +2 more sources
The research of improved MUSIC algorithm based on far field sound source localization
Dianzi Jishu Yingyong, 2018 Systemic research has been done on the thesis of far field sound source localization combined characteristics of the speech signal in this paper. An improved MUSIC algorithm is proposed based on the traditional MUSIC algorithm in far-field of microphone ...
Deng Yanrong +5 more
doaj +1 more source
Revista Facultad de Ingeniería Universidad de Antioquia, 2012 In this paper the application of the Genetic Algorithms (GA) as a search method of a geometric configuration of elementary dipoles that solve the inverse problem of electromagnetic radiation are reported. The inverse problem of electromagnetic radiation
Arturo Rangel Merino +2 more
doaj +1 more source
Far-field Perfect Imaging with Time Modulated Gratings
, 2022 We study the capabilities of time-modulated diffraction gratings as imaging devices. It is shown that a time-dependent but transversally homogeneous slab can be used to make a perfect image of an object in the far-field, since all the evanescent modes ...
Pawel Packo (7873904) +1 more
core +1 more source
Nonreciprocal Electromagnetic Wave Manipulation via a Single Reflection
Advanced Photonics Research, 2023 Electromagnetic field manipulation plays a key role in applications such as electron acceleration, nonlinear light–matter interaction, and radiation engineering.
Lu Wang
doaj +1 more source
2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings, 2006 In this paper we study robust speaker recognition in far-field microphone situations such as meeting scenarios. By applying reverberation compensation and feature warping we achieved significant improvements under mismatched training-testing conditions. To capture useful information from multiple distant microphones, two approaches for multiple channel
Jin, Qin, Pan, Yue, Schultz, Tanja
openaire +7 more sources
Crystals, 2020 A luminaire with a light-emitting diode (LED) array can provide hotspot illumination in a short range. Therefore, a design of a luminaire with the largest central illuminance (LCI) and a high uniformity is warranted.
Ching-Cherng Sun +6 more
doaj +1 more source
Far-field ultrasonic imaging using hyperlenses
Scientific Reports, 2022 Hyperlenses for ultrasonic imaging in nondestructive evaluation and non-invasive diagnostics have not been widely discussed, likely due to the lack of understanding on their performance, as well as challenges with reception of the elastic wavefield past ...
Mohamed Subair Syed Akbar Ali +1 more
doaj +1 more source
OTA testing of near‐field and far‐field communication links
Electronics Letters, 2023 In this work, near‐field and far‐field link measurement in metal enclosure environment is performed. The performance of near‐field and far‐field links are assessed using key performance indicators such as error vector magnitude, bit error rate, and ...
B. Korunur Engiz +3 more
doaj +1 more source