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浏览/检索结果: 共10条，第1-10条 帮助

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Relationship between capillary water absorption mechanism and pore structure and microfracture of red-layer mudstone in central Sichuan 期刊论文  OAI收割
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2023, 卷号: 82, 期号: 4
作者:  Huang, Kang;  Yu, Fei;  Zhang, Wei;  Tong, Kaiwen;  Guo, Jianhua
  |  收藏  |  浏览/下载：22/0  |  提交时间：2023/08/02
Research on Wavelength Shift Correction Algorithm for Tunable Laser Absorption Spectrum 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 期号: 11, 页码: 3328-3333
作者:  Tang Qi-xing;  Zhang Yu-jun;  Chen Dong;  Zhang Kai;  He Ying
  |  收藏  |  浏览/下载：62/0  |  提交时间：2019/12/25
Graphene Characterization by Hilbert-Huang Transform-Based Terahertz Spectroscopy 期刊论文  OAI收割
IEEE PHOTONICS TECHNOLOGY LETTERS, 2017, 卷号: 29, 期号: 21, 页码: 1880-1883
作者:  Liu, Huan;  Fan, Ya-Xian;  Han, Xu;  Lu, Wen-Qiang;  Tao, Zhi-Yong
  |  收藏  |  浏览/下载：25/0  |  提交时间：2018/03/05
碱金属氟化物对掺Yb~(3+)氟磷酸盐玻璃析晶稳定性和光谱性质的影响 期刊论文  OAI收割
光学学报, 2008, 卷号: 28, 期号: 12, 页码: 2383, 2387
董擎雷; 张丽艳; 胡丽丽
收藏  |  浏览/下载：1001/180  |  提交时间：2009/09/24
Cu/AAO纳米有序阵列复合结构的光吸收特性 期刊论文  OAI收割
高等学校化学学报, 2006, 卷号: 27, 期号: 6, 页码: 1101-1105
李燕; 王成伟; 赵新宏; 王建
收藏  |  浏览/下载：39/0  |  提交时间：2014/03/03
Optical characterization of bare CdSe and CdSe/CdS core/shell nanocrystals (EI CONFERENCE) 会议论文  OAI收割
ICO20: Biomedical Optics, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Liu L.;  Yu B.;  Liu L.
收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25
Thiol-capped CdSe/CdS core/shell nanocrystals (NCs) which show high luminescence quantum yield are synthesized in an aqueous solution. UV-Vis absorption spectroscopy and photoluminescence (PL) spectroscopy are employed to analyze optical characters and stabilities of NCs. Furthermore  PL properties are studied in a temperature range between 77K and 300K. The PL peak position of bare CdSe NCs shifts toward shorter wavelengths and the band becomes sharper with decreasing temperature. On the same condition  the PL peak position of CdSe/CdS core/shell NCs keeps unconverted nearly with the variation of temperature. Photostability of bare CdSe NCs and CdSe/CdS core/shell NCs are compared under the 325nm laser irradiation. It takes 78 seconds that the PL intensity declines to the half for CdSe NCs  but 442 seconds for CdSe/CdS core/shell NCs. The fluorescence decay lifetime increases about six times after overcoating. The results indicate that the CdS shell can improve the low temperature PL stability and photostability of CdSe NCs effectively.  
The study on the temperature influence of the grain near infrared spectrum analysis (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Zhang J.;  Chen X.;  Chen X.;  Chen X.;  Zhang J.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
Near-infrared spectroscopy was used to examine unmodified wheat powder at temperatures of 14-65C. A self-regulating diffuse reflected assembly was used to permit collection of spectra of powder samples. Changes to the shape and peak location of the 1400-1500nm and 1900-1950nm water absorption bands  2000-2050  2070-2110 and 2250-2300nm bands were measured as temperature varied. Results indicated that temperature changes resulted in slight changes to the water absorption bands in 1400-1500nm and 1900-1950nm regions. From 14-65C  the 1400-1500nm and 2050-2150nm band shifted approximately 10nm and 16nm toward shorter wavelengths  and 2000-2050nm band shifted approximately 14nm toward longer wavelengths. In addition few numbers of samples cannot constitute good temperature insensitive calibration model even though the spectra were obtained at wide temperature condition.  
High energy long duration frequency-doubled Nd:YAG laser and application to veins occlusion (EI CONFERENCE) 会议论文  OAI收割
High-Power Lasers and Applications III, November 8, 2004 - November 11, 2004, Beijing, China
作者:  Li D.;  Guo J.;  Guo J.;  Tang Y.;  Zhang L.
收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25
Laser treatment represents an attractive option to other methods of vessel diseases especially varicose veins. A long pulse (30-50ms) 532nm laser (Fig.1) is used in our experiments with the pulse duration matching the thermal relaxation time of the vessels and the green laser matching the absorption spectrum peak of the blood. Laser irradiates nude vein vessels directly or exterior skin to finish operation faster and to acquire the practical data for upper enteron varicose vein treatment in several animal experiments performed in vivo. The 5J-energy pulse allows us to finely occlude rabbit or dog's vein vessels up to 2 mm in diameter when irradiating them off external skin (Fig.2). Blood vessels are occluded at once and later biopsy specimens show the immediate and long-term lasting occlusion effect. While irradiating vessels directly (Fig.3)  the vessels are usually irradiated to perforate  detailed causes are still under investigation. Animal experiments show long pulse green laser therapy is a safe and effective solution to the vein's occlusion  which promises such laser with high energy of each pulse and 30-50 ms duration is an ideal candidate for vessel diseases treatment.  
Spontaneous emission and gain characteristics of InGaAs/InGaAsP quantum well laser (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Devices and Integration, November 8, 2004 - November 11, 2004, Beijing, China
作者:  Wang L.;  Wang L.;  Wang L.
收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25
AN EPR STUDY ON PROTON-IMPLANTED DEFECT IN FZ-SILICON 期刊论文  OAI收割
Science in China Series a-Mathematics Physics Astronomy, 1992, 卷号: 35, 期号: 4, 页码: 437-442
E. Wu; X. C. Xi; X. T. Lu; D. Y. Shen; X. M. Wang; G. G. Qin
收藏  |  浏览/下载：10/0  |  提交时间：2012/04/14