中国科学院机构知识库网格系统: 检索

Study on Rapid Recognition of Microplastics Based on Infrared Spectroscopy 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 卷号: 42, 期号: 11, 页码: 3501-3506
作者: Wu Xue; Feng Wei-wei; Cai Zong-qi; Wang Qing

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收藏 | 浏览/下载：16/0 | 提交时间：2023/08/17

Microplastics Near infrared spectrum XGBoost SVM

Study on Rapid Recognition of Microplastics Based on Infrared Spectroscopy 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 卷号: 42, 期号: 11, 页码: 3501-3506
作者: Wu Xue; Feng Wei-wei; Cai Zong-qi; Wang Qing

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收藏 | 浏览/下载：2/0 | 提交时间：2024/11/08

Microplastics Near infrared spectrum XGBoost SVM

Study on Rapid Recognition of Microplastics Based on Infrared Spectroscopy 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 卷号: 42, 期号: 11, 页码: 3501-3506
作者: Wu Xue; Feng Wei-wei; Cai Zong-qi; Wang Qing

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收藏 | 浏览/下载：3/0 | 提交时间：2024/11/08

Microplastics Near infrared spectrum XGBoost SVM

Study on dual-optical paths for simultaneous measurement method of water vapor absorption spectrum in 1 mu m band 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2021, 卷号: 70
作者: Zheng Jian-Jie; Zhu Wen-Yue; Liu Qiang; Ma Hong-Liang; Liu Kun

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收藏 | 浏览/下载：46/0 | 提交时间：2021/11/01

dual-optical paths near infrared spectrum line intensities self-broadening coefficients

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：22/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Effects of NaCl on the Separation of Single-Walled Carbon Nanotubes by Agarose Gel Electrophoresis 期刊论文 OAI收割
Acta Physico-Chimica Sinica, 2010, 卷号: 26, 期号: 10, 页码: 2757-2762
作者: Li QW (李清文); Jin HH (金赫华)

收藏 | 浏览/下载：16/0 | 提交时间：2010/12/13

Single-walled carbon nanotubes Agarose gel electrophoresis UV-visible-near infrared absorption spectrum Separation NaCl

Research on the Near-Infrared Spectrometer System 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 卷号: 29, 期号: 8, 页码: 2286-2290
作者: Xiang Xian-yi; Wen Zhi-yu; Long Zai-chuan; Hong Ming-jian; Liang Yu-qian

收藏 | 浏览/下载：25/0 | 提交时间：2015/09/21

Micro Spectrometer Near-Infrared spectrum Quantitative analysis Glucose

Prediction of maize stover components with near infrared reflectance spectroscopy 期刊论文 OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 卷号: 27, 期号: 2, 页码: 275-278
作者: Liu Li-ying; Chen Hong-zhang

收藏 | 浏览/下载：21/0 | 提交时间：2013/10/15

biomass components of maize stover near infrared reflectance spectrum(NIRS) models

Fast determination of total ginsenosides content in Ginseng powder by near infrared reflectance spectroscopy (EI CONFERENCE) 会议论文 OAI收割
ICO20: Biomedical Optics, August 21, 2005 - August 26, 2005, Changchun, China
作者: Chen X.-D.; Chen X.-D.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

Near infrared (NIR) reflectance spectroscopy was used to develop a fast determination method for total ginsenosides in Ginseng (Panax Ginseng) powder. The spectra were analyzed with multiplicative signal correction (MSC) correlation method. The best correlative spectra region with the total ginsenosides content was 1660 nm1880 nm and 2230nm-2380 nm. The NIR calibration models of ginsenosides were built with multiple linear regression (MLR) principle component regression (PCR) and partial least squares (PLS) regression respectively. The results showed that the calibration model built with PLS combined with MSC and the optimal spectrum region was the best one. The correlation coefficient and the root mean square error of correction validation (RMSEC) of the best calibration model were 0.98 and 0.15% respectively. The optimal spectrum region for calibration was 1204nm-2014nm. The result suggested that using NIR to rapidly determinate the total ginsenosides content in ginseng powder were feasible.

Spectral classification of the cool components of symbiotic stars 期刊论文 OAI收割
CHINESE ASTRONOMY AND ASTROPHYSICS, 1999, 卷号: 23, 期号: 2, 页码: 195-207
作者: Zhu, ZX; Friedjung, M; Huang, CC

收藏 | 浏览/下载：18/0 | 提交时间：2013/02/01

symbiotic star near infrared spectrum spectral classification