Results 21 to 30 of about 2,425 (212)
Photonics, 2022 Vortex beams carrying orbital angular momentum (OAM) have increasingly attracted attention in the field of optical communication. However, transmission is still an issue due to transmission loss, especially in optical fibers.
Yana Shang +9 more
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Spatial Spectral Characteristics of Partial Discharge with Different Electrode Models
Photonics, 2023 In this paper, the spatial spectral characteristics of partial discharge (PD) under different electrode models are mainly studied. In the initial corona discharge stage, the emission spectrum is mainly emitted by the N2(C3IIu→B3IIg) energy level ...
Taiqi Wang +6 more
doaj +1 more source
Indoor Human Fall Detection Algorithm Based on Wireless Sensing
Tsinghua Science and Technology, 2022 As the main health threat to the elderly living alone and performing indoor activities, falls have attracted great attention from institutions and society.
Chao Wang +5 more
doaj +1 more source
Recent Advances in Phase-Sensitive Optical Time Domain Reflectometry (Ф-OTDR)
Photonic Sensors, 2021 Phase-sensitive optical time domain reflectometry (Ф-OTDR) is an effective way to detect vibrations and acoustic waves with high sensitivity, by interrogating coherent Rayleigh backscattering light in sensing fiber. In particular, fiber-optic distributed
Yunjiang Rao +4 more
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Polarization Modulation Instability in Dispersion-Engineered Photonic Crystal Fibers
Crystals, 2021 Generation of widely spaced polarization modulation instability (PMI) sidebands in a wide collection of photonic crystal fibers (PCF), including liquid-filled PCFs, is reported. The contribution of chromatic dispersion and birefringence to the net linear
Abraham Loredo-Trejo +3 more
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PhotoacousticsPhotoacoustic imaging (PAI) is an emerging hybrid imaging technology that combines the advantages of optical and ultrasound imaging. Despite its excellent imaging capabilities, PAI still faces numerous challenges in clinical applications, particularly ...
Liangjie Wang, Yi-Chao Meng, Yiming Qian
doaj +1 more source
Hierarchical Attention Neural Network for Event Types to Improve Event Detection
Sensors, 2022 Event detection is an important task in the field of natural language processing, which aims to detect trigger words in a sentence and classify them into specific event types.
Yanliang Jin +5 more
doaj +1 more source
IEEE Photonics Journal, 2023 We theoretically and experimentally proposed the generation method of third-order orbital angular momentum (OAM) modes with reduced losses by cascading two adiabatic mode selective couplers (MSCs), in which the LP11 mode produced as an excitation mode ...
Mengdi Zhang +8 more
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Optical Fiber Networks for Remote Fiber Optic Sensors [PDF]
Sensors, 2012 This paper presents an overview of optical fiber sensor networks for remote sensing. Firstly, the state of the art of remote fiber sensor systems has been considered. We have summarized the great evolution of these systems in recent years; this progress confirms that fiber-optic remote sensing is a promising technology with a wide field of practical ...
Montserrat Fernandez-Vallejo +1 more
openaire +5 more sources
Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source