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毛黄栌枝叶挥发性化学成分研究(2005) 会议论文
中国化学会第十三届有机分析与生物分析学术会议
作者:  李惠成;  田瑄
收藏  |  浏览/下载：1/0  |  提交时间：2015/06/25
LaFeO_3纳米材料电四极超精细相互作用TDPAC测量(2005) 会议论文
第九届全国正电子谱学会议
作者:  杜恩鹏;  郑永男;  周冬梅;  左翼;  袁大庆
收藏  |  浏览/下载：3/0  |  提交时间：2015/06/25
Investigation of growth mode in ZnO thin films prepared at different temperature by plasma-molecular beam epitaxy (EI CONFERENCE) 会议论文
13th International Conference on Molecular Beam Epitaxy, August 22, 2004 - August 27, 2004, 13th International Conference on Molecular Beam Epitaxy, August 22, 2004 - August 27, 2004
Liang H. W.; Lu Y. M.; Shen D. Z.; Yan J. F.; Li B. H.; Zhang J. Y.; Liu Y. C.; Fan X. W.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
High-quality ZnO thin films on c-plane sapphire (Al2O 3) substrates were prepared by plasma-molecular beam epitaxy (P-MBE). The influence of growth temperature on growth mode of ZnO was investigated. Real-time monitored by reflection high-energy electron diffraction (RHEED) images show that  below 500 C  ZnO thin film was grown by three-dimension (3D) growth mode. While the two-dimension (2D) growth mode was obtained above growth temperature of 650 C. Atomic force microscopy (AFM) images present that the surface morphology of ZnO thin film with 2D growth is improved and X-ray rocking curves (XRC) indicate that the full width at half maximum (FWHM) of the ZnO (0 0 2) peak becomes narrow. From the photoluminescence (PL) spectra  ultraviolet (UV) emission peak exhibits obvious blue-shift for the samples grown at lower temperature  which is attributed to the effect of the quantum confinement arisen from small crystal grain sizes. The minimum carrier concentration of N=7.661016 cm-3 was obtained in the ZnO thin films with the 2D grown  which is closed to that of bulk ZnO. 2005 Elsevier B.V. All rights reserved.  
CMOS APS imaging system application in star tracker (EI CONFERENCE) 会议论文
Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China
Li J.; Liu J.; Li X.; Liu Y.; Hao Z.
收藏  |  浏览/下载：52/0  |  提交时间：2013/03/25
Small satellites are capable of performing space explore missions that require accurate attitude determination and control. However  low weight  size  power and cost requirements limit the types of attitude sensor of small craft  such as CCD  are not practical for small satellites. CMOS APS is a good substitute for attitude sensors of small craft. Some of the technical advantages of CMOS APS are no blooming  single power  low power consumption  small size and little support circuitry  direct digital output  simple to system design  in particular  radiation-hard characteristic compare with CCD. This paper discusses the application probability of CMOS APS in star tracker for small satellites  further more  a prototype ground-based star camera based on STAR250 CMOS image sensor has been built. In order to extract stars positions coordinates  subpixel accuracy centroiding algorithm has been developed and tested on some ground-based images. Moreover  the camera system star sensitivity and noise model are analyzed  and the system accuracy is been evaluated. Experimental results indicate that a star camera based on CMOS APS is a viable practical attitude sensor appropriate for space small satellites.  
High energy long duration frequency-doubled Nd:YAG laser and application to veins occlusion (EI CONFERENCE) 会议论文
High-Power Lasers and Applications III, November 8, 2004 - November 11, 2004, Beijing, China
Zhang L.; Yang G.; Li D.; Lu Q.; Gu H.; Zhu L.; Zhao Z.; Li X.; Tang Y.; Guo J.
收藏  |  浏览/下载：20/0  |  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.  
Comparison of three chemometrics methods for Near-Infrared spectra of glucose in the whole blood 会议论文
2005
Zhang H. Y.; Ding D.; Li X.; Chen Y.; Tang Y. G.
收藏  |  浏览/下载：10/0  |  提交时间：2013/03/28
Vertical-external-cavity surface-emitting lasers operating at different wavelength: design, numerical simulation, and characteristics - art. no. 602004 会议论文
2005
Yan C. L.; Qin L.; Shan X. N.; Lu G. G.; He C. F.; Sun Y. F.; Li T.; Ning Y. Q.; Wang L. J.; Jiang H. L.
收藏  |  浏览/下载：8/0  |  提交时间：2013/03/28
Self Imaging technique for refocusing an aerospace camera (EI CONFERENCE) 会议论文
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
Li Z.; Wang X.; Li W.; Kuang H.; Han C.
收藏  |  浏览/下载：25/0  |  提交时间：2013/03/25
A novel auto-focusing technique using a self imaging approach is developed for an aerospace camera having large aperture and long focus. Its optical system consists of an emitting system  receiving system  and two penta-prisms. Emitting system has three parts: a light source  beamsplitter  and aim slit. The receiving system includes a field lens  two separate lenses  and CCD. Using two little penta-prisms instead of a large planar mirror makes the autofocus system simple and compact. CCD was used as photoelectric converting device. A defocused signal is acquired by measuring the change of the two slit self-images position imaged on the CCD. A simple and compact construction of the auto-focusing system was proposed. The algorithm to calculate the moving of the slit-self images position was analyzed in order to achieve subpixel position estimation. The results of the experiments show a 10m focusing precision. The system demonstrates high resolution  easy adjustment and high reliability.  
A new high-precision measurement system used in the image calibration of large-sized photographic instrument 会议论文
2005
Li Y.; Liu Z. X.
收藏  |  浏览/下载：6/0  |  提交时间：2013/03/28
High-power VCSELs single devices aid 2-D arrays (EI CONFERENCE) 会议论文
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
Sun Y.; Ning Y.; Li T.; Shan X.; Lu G.; He C.; Qin L.; Yan C.; Liu Y.; Wang L.
收藏  |  浏览/下载：11/0  |  提交时间：2013/03/25

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