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筛选

浏览/检索结果: 共39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 High-sensitive double incidence multi-pass cell for trace gas detection based on TDLAS 期刊论文  OAI收割 SENSORS AND ACTUATORS B-CHEMICAL, 2024, 卷号: 412 作者:  Shi, Yongpeng;  Hu, Zhen;  Niu, Mingsheng;  Li, Taohua;  Li, Hui   |  收藏  |  浏览/下载：5/0  |  提交时间：2024/11/20 Gas detection system  TDLAS  Dual-incidence multi-pass cell  Laser frequency correction  Wavelength modulation spectroscopy  Atmospheric monitoring   Progress in multi-messenger observations and emission models of blazars 期刊论文  OAI收割 NEW ASTRONOMY REVIEWS, 2024, 卷号: 98 作者:  Cao, Gang;  Geng, Xiongfei;  Wang JC(王建成);  Yang, Xiongbang   |  收藏  |  浏览/下载：23/0  |  提交时间：2024/03/29 Blazars  Multi-wavelength astronomy  High energy  Neutrino astrophysics   沙尘气溶胶粒子多波长退偏振特性仿真研究 期刊论文  OAI收割 大气与环境光学学报, 2023, 卷号: 18 作者:     |  收藏  |  浏览/下载：4/0  |  提交时间：2024/11/20 non-spherical particle  super-ellipsoid model  dust aerosol  multi-wavelength  depolarization ratio  非球形粒子  超椭球模型  沙尘气溶胶  多波长  退偏振比   Color Recognition of Transparent Plastic Based on Multi-Wavelength Transmission Spectrum 期刊论文  OAI收割 APPLIED SCIENCES-BASEL, 2022, 卷号: 12 作者:  Shi, Chaoyi;  Dai, Fuliang;  Lu, Cuiping;  Yu, Shaohui;  Lu, Meina   |  收藏  |  浏览/下载：34/0  |  提交时间：2022/12/23 transparent plastic  color recognition  multi-wavelength transmission spectrum  machine learning  recycling  sustainable development   A new method for detecting mixed bacteria based on multi-wavelength transmission spectroscopy technology 期刊论文  OAI收割 SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2022, 卷号: 270 作者:  Feng, Chun;  Zhao, Nanjing;  Yin, Gaofang;  Gan, Tingting;  Yang, Ruifang   |  收藏  |  浏览/下载：69/0  |  提交时间：2022/03/21 Spectral separation  Bacteria  Monte carlo  Principal component analysis  Backpropagation neural networks  Multi-wavelength transmission spectrum   Artificial neural networks combined multi-wavelength transmission spectrum feature extraction for sensitive identification of waterborne bacteria 期刊论文  OAI收割 SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2021, 卷号: 251 作者:  Feng, Chun;  Zhao, Nanjing;  Yin, Gaofang;  Gan, Tingting;  Yang, Ruifang   |  收藏  |  浏览/下载：32/0  |  提交时间：2021/04/26 Bacterial species  Identification  Artificial neural networks  Multi-wavelength transmission spectrum  Generalized regression neural network  Back propagation neural network   Comprehensive evaluation of NAODESHENG by combining UPLC quantitative fingerprint and antioxidant activity 期刊论文  OAI收割 JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS, 2021, 卷号: 193, 页码: 7 作者:  Liao, Jun-cheng;  Wu, Yun-shan;  Xu, Fang-fang;  Chen, Wei-ying;  Zheng, Zuo-liang   |  收藏  |  浏览/下载：28/0  |  提交时间：2021/05/24 Determination of content  NAODESHENG  Multi-wavelength fusion fingerprint  Anti-oxidation  Traditional Chinese Medicine (TCM)   Investigation on the Multiwavelength Laser Operation and Polarization Characteristics of Er : YAP Crystal 期刊论文  OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 卷号: 40 作者:  Quan Cong;  Sun Dun-lu;  Luo Jian-qiao;  Zhang Hui-li;  Fang Zhong-qing   |  收藏  |  浏览/下载：25/0  |  提交时间：2020/11/26 Er : YAP crystal  Polarization characteristics  Multi-wavelength laser operation  Energy levels identify   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   |  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 distances1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources4-13, 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 flare18-21. 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.   Wide wavelength tuning on F-4(3/2) -> I-4(13/2) transitions from Nd:ScYSiO5 laser 期刊论文  OAI收割 OPTICS AND LASER TECHNOLOGY, 2019, 卷号: 111, 页码: 770 作者:  Dong, Lulu;  Wang, Qiangguo;  Yao, Yongping;  Liu, Shande;  Zhang, Huiyun   |  收藏  |  浏览/下载：62/0  |  提交时间：2019/12/26 1.3 mu m tunable laser  Nd:SYSO crystal  Multi-wavelength oscillations  Birefringent filter