中国科学院机构知识库网格系统: 检索

Identification of glycan branching patterns using multistage mass spectrometry with spectra tree analysis 期刊论文 OAI收割
JOURNAL OF PROTEOMICS, 2020, 卷号: 217, 页码: 7
作者: Wang, Hui; Zhang, Jingwei; Dong, Junchuan; Hou, Meijie; Pan, Weiyi

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收藏 | 浏览/下载：44/0 | 提交时间：2020/12/10

Multi-stage mass spectrometry Glycan branching pattern Glycan identification Spectra tree Isomeric glycan

No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文 OAI收割
Nature, 2020, 卷号: 587, 页码: 63-65
作者: HXMT

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收藏 | 浏览/下载：44/0 | 提交时间：2022/02/08

Astrophysics - High Energy Astrophysical Phenomena Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances^1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources^4-13, but no convincing evidence has been collected so far¹⁴. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts¹⁵. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare^18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.

Difference Analysis of LAMOST Stellar Spectrum and Kurucz Model Based on Grid Clustering 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 卷号: 37, 期号: 6, 页码: 1951-1954
作者: Chen Shu-xin; Sun Wei-min; Kong Xiao

收藏 | 浏览/下载：29/0 | 提交时间：2017/09/01

Cluster analysis Kurucz model spectra Distance measurement LAMOST (large sky area multi-object fiber spectroscopy telescope)

A New Redshift Measuring Method for Low-Quality Galaxy Spectra Based on Multi Resolution Fusion Distance 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 卷号: 36, 期号: 5, 页码: 1521-1525
作者: Pan Jing-chang; Luo A-li; Wei Peng; Jiang Bin; Li Yin-bi

收藏 | 浏览/下载：24/0 | 提交时间：2016/11/02

Galaxy spectra Redshift measurement Multi resolutions Low-quality spectra

Optimized basis function for spectral reflectance recovery from tristimulus values 期刊论文 OAI收割
Optical Review, 2014, 卷号: 21, 期号: 2, 页码: 117-126
作者: Wu DL(吴登禄); Tian JD(田建东); Tang YD(唐延东)

收藏 | 浏览/下载：35/0 | 提交时间：2014/05/14

basis function reflectance spectra recovery multi-object optimization PCA method genetic algorithm tristimulus values

The Multi-Spectra Classification Algorithm Based on K-Means Clustering and Spectral Angle Cosine 期刊论文 OAI收割
spectroscopy and spectral analysis, 2011, 卷号: 31, 期号: 5, 页码: 1357-1360
作者: Wei Jun-xia; Xiangli Bin; Gao Xiao-hui; Duan Xiao-feng

收藏 | 浏览/下载：22/0 | 提交时间：2011/09/30

K-means Euclidean distance method Spectral angle cosine method Multi-spectra

Information extraction from laser speckle patterns using wavelet entropy techniques (EI CONFERENCE) 会议论文 OAI收割
MIPPR 2011: Multispectral Image Acquisition, Processing, and Analysis, November 4, 2011 - November 6, 2011, Guilin, China
作者: Li X.-Z.; Wang X.-J.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

A novel speckle patterns processing method is presented using multi-scale wavelet techniques. Laser speckle patterns generated from the sample contained abundant information. In this paper we propose a method using wavelet entropy techniques to analyze the speckle patterns and exact the information on the sample surface. In our case we used this approach to test the solar silicon cell surface profiles based on the sym8 orthogonal wavelet family. According different wavelet entropy values the micro-structure of different solar silicon cell surfaces were comparative analyzed. Furthermore we studied the AFM and reflective spectra of the wafer. Results show that the wavelet entropy speckle processing method is effective and accurate. And the experiment proved that this method is a useful tool to investigate the surface profile quality. 2011 SPIE.

Performance and sensitivity of Low Resolution Spectrographs for LAMOST 会议论文 OAI收割
San Diego, California, USA, 2010-6-27
作者: Zhongwen Hu; Yongtian Zhu; Jianing Wang; Lei Wang; Yonghui Hou

收藏 | 浏览/下载：40/0 | 提交时间：2014/01/06

spectrograph multi-fibers spectra survey.

The Angular & Spectral Kernel Model for BRDF and Albedo Retrieval 会议论文 OAI收割
2009 Ieee International Geoscience and Remote Sensing Symposium, Vols 1-5, New York
Liu, Sihan; Liu, Qiang; Liu, Qinhuo; Wen, Jianguang; Li, Xiaowen; Xiao, Qing; Xin, Xiaozhou

收藏 | 浏览/下载：26/0 | 提交时间：2014/12/07

BRDF multi-angle multi-spectra kernel-driven model albedo BROAD-BAND ALBEDO MODIS

新型多氮杂环金属配合物的合成及其光谱研究 期刊论文 OAI收割
光谱学与光谱分析, 2008, 卷号: 28, 期号: 11, 页码: 2511, 2514
江欣; 吴谊群; 贺春英

收藏 | 浏览/下载：2029/726 | 提交时间：2009/09/22

多氮杂环金属配合物 Multi-nitrogen heterocyclic metal complexes 合成 Synthesis 红外光谱 Infrared spectra 紫外-可见光谱 UV-Vis spectroscopy