中国科学院机构知识库网格系统: 检索

Size-controllable colloidal Ag nano-aggregates with long-time SERS detection window for on-line high-throughput detection 期刊论文 OAI收割
TALANTA, 2023, 卷号: 257, 页码: 8
作者: Cheng, Jianxia; Zhang, Zhiyang; Zhang, Longfei; Miao, Jiaqi; Chen, Yan

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收藏 | 浏览/下载：11/0 | 提交时间：2024/11/08

Silver nano-aggregates SERS Freeze-thaw Ultrasonication High-throughput On-line detection

Size-controllable colloidal Ag nano-aggregates with long-time SERS detection window for on-line high-throughput detection 期刊论文 OAI收割
TALANTA, 2023, 卷号: 257, 页码: 8
作者: Cheng, Jianxia; Zhang, Zhiyang; Zhang, Longfei; Miao, Jiaqi; Chen, Yan

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收藏 | 浏览/下载：18/0 | 提交时间：2023/11/15

Silver nano-aggregates SERS Freeze-thaw Ultrasonication High-throughput On-line detection

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：28/0 | 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).

Rapid detection of taste and odor compounds in water using the newly invented chemi-ionization technique coupled with time-of-flight mass spectrometry 期刊论文 OAI收割
ANALYTICA CHIMICA ACTA, 2018, 卷号: 1035, 页码: 119-128
作者: Ma, Pengkun; Yang, Bo; Shu, Jinian; Zhang, Haixu; Huang, Jingyun

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收藏 | 浏览/下载：58/0 | 提交时间：2019/06/21

On-line detection Odorant Water Chemi-ionization Mass spectrometry

Continuously Monitoring of Concentration of Extracellular Ascorbic Acid in Spinal Cord Injury Model 期刊论文 OAI收割
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY, 2017, 卷号: 45, 期号: 11, 页码: 1595-1599
作者: Lyu Yang; Zhang Ya-Wen; Tan Lei; Ji Wen-Liang; Yu Ping

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收藏 | 浏览/下载：24/0 | 提交时间：2018/03/12

Ascorbic Acid Spinal Cord Injury In Vivo Microdialysis On-line Electrochemical Detection

The bridge between thin layer chromatography-mass spectrometry and high-performance liquid chromatography-mass spectrometry: The realization of liquid thin layer chromatography-mass spectrometry (LTLC-MS) 期刊论文 OAI收割
JOURNAL OF CHROMATOGRAPHY A, 2016, 卷号: 1460, 页码: 181-189
作者: Li, Yafeng; Wang, Jianing; Zhan, Lingpeng; Wleklinski, Michael; Wang, Jiyun

收藏 | 浏览/下载：46/0 | 提交时间：2016/12/29

Interface of MS and TLC Ambient ionization Pencil mark On-line separation and detection Reaction monitoring Glow discharge ionization

Continuous monitoring of bisulfide variation in microdialysis effluents by on-line droplet-based microfluidic fluorescent sensor 期刊论文 OAI收割
BIOSENSORS & BIOELECTRONICS, 2014, 卷号: 55, 页码: 438-445
作者: Zhu, Xiaocui; Xu, Lei; Wu, Tongbo; Xu, Anqin; Zhao, Meiping

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收藏 | 浏览/下载：26/0 | 提交时间：2019/04/09

Hydrogen Sulfide Gold Nanoparticle Droplet-based Microfluidics Microdialysis Effluents On-line Detection

In vivo electrochemical recording of continuous change of magnesium in medial vestibular nucleus following vertigo induced by ice water vestibular stimulation 期刊论文 OAI收割
SCIENCE CHINA-CHEMISTRY, 2013, 卷号: 56, 期号: 2, 页码: 256-261
作者: Xin Ying; Zhang ZiPin; Yu Ping; Ma FuRong; Mao LanQun

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收藏 | 浏览/下载：25/0 | 提交时间：2019/04/09

On-line Electrochemical Detection In Vivo Microdialysis Magnesium Vertigo

Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者:

收藏 | 浏览/下载：39/0 | 提交时间：2013/03/25

Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system a deuterium lamp a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.

基于统计部首模型的联机手写汉字识别 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2010
作者: 马龙龙

收藏 | 浏览/下载：68/0 | 提交时间：2015/09/02

联机手写汉字识别层次结构部首过分割部首识别路径搜索特殊部首检测 on-line handwritten chinese character recognition hierarchical structure radical over-segmentation radical recognition path search special radical detection