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浏览/检索结果: 共46条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Machine learning-assisted structure annotation of natural products based on MS and NMR data 期刊论文  OAI收割 NATURAL PRODUCT REPORTS, 2023, 卷号: 40, 期号: 11, 页码: 1735-1753 作者:  Hu,Guilin   |  收藏  |  浏览/下载：5/0  |  提交时间：2024/07/10 H-1-NMR CHEMICAL-SHIFTS  STRUCTURE-BASED PREDICTIONS  TANDEM MASS-SPECTRA  STRUCTURE ELUCIDATION  NEURAL-NETWORK  METABOLITE IDENTIFICATION  COMP   Self-reaction of C2H5O2 and its cross-reaction with HO2 studied with vacuum ultraviolet photoionization mass spectrometry 期刊论文  OAI收割 CHEMICAL PHYSICS LETTERS, 2022, 卷号: 806 作者:  Wen, Zuoying;  Yue, Hao;  Zhang, Yang;  Lin, Xiaoxiao;  Ma, Ziji   |  收藏  |  浏览/下载：46/0  |  提交时间：2022/12/22 Ethyl peroxy radical  Self-reaction  VUV photoionization mass spectrometry  Theoretical calculation  Photoionization spectra   Absorption spectra and exciton g factor of InAs1-x N (x) nanowires in a magnetic field 期刊论文  OAI收割 APPLIED PHYSICS EXPRESS, 2022, 卷号: 15, 期号: 6, 页码: 5 作者:  Yu, Leyong;  Xiong, Wen   |  收藏  |  浏览/下载：36/0  |  提交时间：2022/08/22 effective-mass theory  band anticrossing model  absorption spectra  g factor   Absorption spectra and exciton g factor of InAs1?x N x nanowires in a magnetic field 期刊论文  OAI收割 Applied Physics Express, 2022, 卷号: 15, 期号: 6 作者:  Yu,Leyong;  Xiong,Wen   |  收藏  |  浏览/下载：28/0  |  提交时间：2022/08/22 effective-mass theory  band anticrossing model  absorption spectra  g factor   Precise measurements of thermionic emission behaviors for hot gas-phase C-60 and C-70 molecules 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2021, 卷号: 462, 页码: 5 作者:     |  收藏  |  浏览/下载：26/0  |  提交时间：2021/12/10 Thermionic emission  Velocity-map-imaging  Mass spectra   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   |  收藏  |  浏览/下载：43/0  |  提交时间：2020/12/10 Multi-stage mass spectrometry  Glycan branching pattern  Glycan identification  Spectra tree  Isomeric glycan   Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文  OAI收割 Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158 作者:  HXMT   |  收藏  |  浏览/下载：48/0  |  提交时间：2022/02/08 Insight-HXMT  Geant4 simulation  Background observation  Astrophysics  - Instrumentation and Methods for Astrophysics  Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation  (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.   Weak space charge effects in laser multiphoton ionization of a rarefied gas beam of heavy species 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2019, 卷号: 440, 页码: 27-31 作者:  Ma, Xin-Wen;  Wu, Yong;  Zhu, Xiao-Long;  Zhang, Shao-Feng;  Zhu, Yu-Hao   |  收藏  |  浏览/下载：59/0  |  提交时间：2019/11/10 Space charge effects  Multiphoton ionization  Mass spectra  Velocity map imaging   Wavelength Drift Correction Method Based on Energy Redistribution 期刊论文  OAI收割 CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 2019, 卷号: 40, 期号: 8, 页码: 1600-1605 作者:  Yu Bingwen;  Jin Wei;  Jin Qinhan;  Liu Xu   |  收藏  |  浏览/下载：18/0  |  提交时间：2021/02/02 PEAK DETECTION  CORRECTION ALGORITHM  MASS-SPECTRA  CALIBRATION  Wavelength drift correction  Atomic emission spectrometry  Energy redistribution   Feasibility of coupling a thermal/optical carbonanalyzer to a quadrupole mass spectrometer forenhanced PM2.5 speciation 期刊论文  OAI收割 Journal of the Air & Waste Management Association, 2018, 卷号: 68, 期号: 5, 页码: 463-476 作者:  Gustavo M. Riggio;  Chow, Judith C;  Cropper,Paul M;  Wang, XL(Wang, Xiaoliang);  Yatavelli,Reddy L. N   |  收藏  |  浏览/下载：33/0  |  提交时间：2018/09/29 Pm2.5 Speciatiopn  Material Balance  Thermal Analysis  Quartz-fiber  Mass Spectra