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A Turbidity-Compensation Method for Nitrate Measurement Based on Ultraviolet Difference Spectroscopy 期刊论文 OAI收割
MOLECULES, 2023, 卷号: 28, 期号: 1
作者: Dong, Jing; Tang, Junwu; Wu, Guojun; Li, Ruizhuo

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收藏 | 浏览/下载：22/0 | 提交时间：2023/02/10

nitrate ultraviolet spectroscopy turbidity compensation difference spectrum partial least squares

Evidence for WW/WZ vector boson scattering in the decay channel $\ell\nu$qq produced in association with two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV 期刊论文 OAI收割
PHYSICS LETTERS B, 2022, 卷号: 834, 页码: 137438
作者: CMS Collaboration

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收藏 | 浏览/下载：20/0 | 提交时间：2023/11/09

p p: colliding beams vector boson: pair production dijet: associated production W: pair production Z0: associated production vector boson: scattering parton: distribution function p p: scattering transverse momentum: missing-energy W: hadronic decay Z0: hadronic decay parton: transverse momentum muon quantum chromodynamics CMS electroweak interaction electron dijet: mass spectrum final state: ((n)jet lepton) CERN LHC Coll rapidity: difference signature phase space channel cross section: measured experimental results 13000 GeV-cms

An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文 OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者: HXMT

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收藏 | 浏览/下载：60/0 | 提交时间：2022/02/08

accretion accretion disks black hole physics X-rays: binaries time Astrophysics - High Energy Astrophysical Phenomena Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.

Histogram-Based Autoadaptive Filter for Destriping NDVI Imagery Acquired by UAV-Loaded Multispectral Camera 期刊论文 OAI收割
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2019, 卷号: 16, 期号: 4, 页码: 648-652
作者: Lin, Jiayuan; Zuo, Hang; Ye, Yaya; Liao, Xiaohan

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收藏 | 浏览/下载：132/0 | 提交时间：2019/05/22

Agricultural multispectral camera (ADC) lite auto-adaptive filter Fourier spectrum image histogram normalized difference vegetation index (NDVI) stripe noise unmanned aerial vehicles (UAV)

Histogram-Based Autoadaptive Filter for Destriping NDVI Imagery Acquired by UAV-Loaded Multispectral Camera 期刊论文 OAI收割
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2019, 卷号: 16, 期号: 4, 页码: 648-652
作者:

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收藏 | 浏览/下载：23/0 | 提交时间：2019/05/22

Agricultural multispectral camera (ADC) lite auto-adaptive filter Fourier spectrum image histogram normalized difference vegetation index (NDVI) stripe noise unmanned aerial vehicles (UAV)

Histogram-Based Autoadaptive Filter for Destriping NDVI Imagery Acquired by UAV-Loaded Multispectral Camera 期刊论文 OAI收割
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 2019, 卷号: 16, 期号: 4, 页码: 648-652
作者: Lin, Jiayuan; Zuo, Hang; Ye, Yaya; Liao, Xiaohan

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收藏 | 浏览/下载：21/0 | 提交时间：2019/05/22

Agricultural multispectral camera (ADC) lite auto-adaptive filter Fourier spectrum image histogram normalized difference vegetation index (NDVI) stripe noise unmanned aerial vehicles (UAV)

A load classification framework based on VMD and singular value energy difference spectrum 会议论文 OAI收割
Nanjing, China, May 27-31, 2019
作者: Chen, Shuo; Guo, Kunya; Zeng, Peng; Lv, Xunming; Jia, Zhida

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收藏 | 浏览/下载：19/0 | 提交时间：2019/09/15

VMD energy difference spectrum load classification compactness

Controllable Synthesis and Surface-enhanced Upconversion Luminescence of Ultra-thin Gold Shell Coated NaYF4: Yb, Er@SiO2 Nanostructures 期刊论文 OAI收割
Faguang Xuebao/Chinese Journal of Luminescence, 2018, 卷号: 39, 期号: 11, 页码: 1505-1512
作者: An, Xi-Tao; Wang, Yue; Mu, Jia-Jia; Li, Jing; Zhang, Li-Gong

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收藏 | 浏览/下载：28/0 | 提交时间：2019/09/17

Gold coatings Curve fitting Energy transfer Finite difference time domain method Fluorescence Forster resonance energy transfer Laser excitation Nanoshells Nanostructured materials Shells (structures) Silica Spectrum analysis Surface plasmons

Chromatic analysis of harmonic Fresnel lenses by FDTD and angular spectrum methods 期刊论文 OAI收割
Applied Optics, 2018, 卷号: 57, 期号: 19, 页码: 5281-5287
作者: Yang, Jianming; Twardowski, Patrice; Gerard, Philippe; Yu, Wenhui; Fontaine, Joel

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收藏 | 浏览/下载：24/0 | 提交时间：2019/09/17

Time domain analysis Angle measurement Diffraction efficiency Efficiency Finite difference time domain method Full width at half maximum Harmonic analysis Optical instrument lenses Refractive index Spectrum analysis

Phase difference measurement of sweep signal with rapid cycling mode based on Labview 期刊论文 OAI收割
HIGH POWER LASER AND PARTICLE BEAMS, 2015, 卷号: 27, 期号: 6, 页码: 65104
作者: Xie ZL(谢长玲); Sun H(孙虹); Li X(李晓); Xie; Changling

收藏 | 浏览/下载：41/0 | 提交时间：2016/04/18

FFT spectrum Labview graphical programming Measurement algorithms Phase difference measurements Rapid cycling Spallation neutron sources Virtual instrument Virtual instrument technology