中国科学院机构知识库网格系统: 检索

An extreme ultraviolet spectrometer working at 10-130 angstrom for tungsten spectra observation with high spectral resolution and fast-time response in Experimental Advanced Superconducting Tokamak 期刊论文 OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2021, 卷号: 1010
作者: Xu, Zong; Zhang, Ling; Cheng, Yunxin; Morita, Shigeru; Li, Lei

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收藏 | 浏览/下载：47/0 | 提交时间：2021/08/31

EUV spectrometer Tungsten spectra High spectral resolution Fast-time response EAST

Improving speech enhancement by focusing on smaller values using relative loss 期刊论文 OAI收割
IET SIGNAL PROCESSING, 2020, 卷号: 14, 期号: 6, 页码: 374-384
作者: Li, Hongfeng; Xu, Yanyan; Ke, Dengfeng; Su, Kaile

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收藏 | 浏览/下载：23/0 | 提交时间：2020/09/07

speech enhancement speech intelligibility performance evaluation learning (artificial intelligence) neural nets absolute differences speech quality relative loss single-channel speech enhancement noisy speech ideal ratio mask phase-sensitive mask mean square error loss function absolute error values magnitude spectra deep learning clean speech recovery short-time objective intelligibility signal-to-distortion ratio segmental signal-to-noise ratio performance evaluation

Numerical implementation and evaluation of resolvent-based estimation for space-time energy spectra in turbulent channel flows 期刊论文 OAI收割
ACTA MECHANICA SINICA, 2020, 页码: 14
作者: Yang BW(杨博文); Jin GD(晋国栋); Wu T(吴霆); Yang ZX(杨子轩); He GW(何国威)

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收藏 | 浏览/下载：119/0 | 提交时间：2020/08/26

Space-time energy spectra Turbulent channel flow Resolvent operator

Far-infrared terahertz properties of L-cysteine and its hydrochloride monohydrate 期刊论文 OAI收割
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2020, 卷号: 225, 页码: -
作者: Ren, GH; Zong, SQ; Zhu, ZJ; Cheng, C; Chen, LG

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收藏 | 浏览/下载：51/0 | 提交时间：2021/09/06

TIME-DOMAIN SPECTROSCOPY CHLORIDE CHANNEL AMINO-ACIDS VIBRATIONS SPECTRA

Broadband Terahertz Spectroscopy of Glutathione 期刊论文 OAI收割
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY, 2020, 卷号: 48, 期号: 10, 页码: 1367-1374
作者: Guo, G; Zhu, ZJ; Shen, JX; Zhang, ZC; Zhang, JB

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收藏 | 浏览/下载：67/0 | 提交时间：2021/09/06

TIME-DOMAIN SPECTROSCOPY CRYSTAL-STRUCTURE DIELECTRIC-SPECTROSCOPY INFRARED-SPECTROSCOPY GAS-PHASE DYNAMICS FORM PROTEINS SPECTRA

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：58/0 | 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.

Terahertz spectroscopic investigation of gallic acid and its monohydrate 期刊论文 OAI收割
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2018, 卷号: 190, 页码: 40-46
作者: Zhang, B; Li, SP; Wang, CY; Zou, T; Pan, TT

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收藏 | 浏览/下载：26/0 | 提交时间：2018/09/06

Time-domain Spectroscopy Dehydration Kinetics Spectra Crystals

Scaling of energy spectra in weakly compressible turbulence 期刊论文 OAI收割
ACTA MECHANICA SINICA, 2017, 卷号: 33, 期号: 3, 页码: 500-507
作者: Dong YF(董宇峰); He GW(何国威)

收藏 | 浏览/下载：36/0 | 提交时间：2017/10/25

Compressible Turbulence Energy Spectra Two-point Closure Space-time Correlation

The Delay Time Dependence of the Photoelectron Spectra and State Populations of Three-Level Ladder K-2 Molecule(1) 期刊论文 OAI收割
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, 2017, 卷号: 91, 期号: 2, 页码: 366-372
作者: Lu, Xingqiang; Guo, Wei; Wang, Xinlin

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收藏 | 浏览/下载：23/0 | 提交时间：2019/06/20

Photoelectron Spectra State Populations Time-dependent Wave Packet Approach Three-level Ladder K-2 Molecule

Terahertz Spectra of Ninhydrin and Indane-1,2,3-Trione 期刊论文 OAI收割
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES, 2017, 卷号: 38, 期号: 7, 页码: 896-908
作者: Zou, T; Li, SP; Pan, TT; Zhang, B; Yu, Z

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收藏 | 浏览/下载：29/0 | 提交时间：2018/08/30

Density-functional Theory Time-domain Spectroscopy Solid-state Pulsed Spectroscopy Vibrational-spectra Crystal-structure Thz Spectroscopy Dehydration Monohydrate Acid