机构

• 长春光学精密机械与物... [2]
• 化学研究所 [2]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2009 [1]
• 2004 [1]
• 2002 [1]
• 2001 [1]

学科主题

筛选

浏览/检索结果: 共4条，第1-4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 Algorithm of image enhancement based on order morphology transformation (EI CONFERENCE) 会议论文  OAI收割 2009 International Forum on Information Technology and Applications, IFITA 2009, May 15, 2009 - May 17, 2009, Chengdu, China 作者:  Liu Y.;  Liu Y.;  Liu Y. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 A method based Tsallis entropy and order morphology transform for gray image enhancement is proposed in this article. The order morphology transform method improves the evaluation guide of transform  and chose the percentile value and structure B value by the Maximum Tsallis entropy of the area where the coefficient q is 0.8  enhances the gray image. Experiments show that the method enhances the image contrast and suppressing noise and extracting edge. The histogram and gray value show that the image contrast is improved. 2009 IEEE.   Rare-earth doped tungsten tellurite glasses and waveguides: Fabrication and characterization (EI CONFERENCE) 会议论文  OAI收割 Physics of Non-Crystalline Solids 10, October 15, 2004 - October 15, 2004, Parma, Italy 作者:  Chen B.;  Chen B. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 Tungsten tellurite glasses doped with Er3+  Tm3+  Pr3+  and Ho3+ ions were prepared by melt quenching. The glass matrix was the same for all types of glasses and had a high sodium content in order to allow the fabrication of waveguides using an ion-exchange technique. The absorption spectra of the glasses were measured and the Judd-Ofelt parameters q were obtained from the experimental oscillator strengths of the f &rarr f transitions. Er3+ doped glasses showed a very high quantum efficiency when comparing the calculated radiative decay time with the measured lifetime of the 4I 13/2 metastable level. Ag+ Na+ ion-exchanged planar waveguides were successfully obtained in all types of glasses and characterized by the prism coupling technique. It turned out that the diffusion constant values are very similar for glasses containing different rare-earth ions with the same concentration  while  at least for the Er 3+ doped ones  the diffusion constant changes with the ions concentration. 2004 Elsevier B.V. All rights reserved.   Theoretical studies on the mechanism of the proton-transfer-coupled electron transfer reactions between menaquinone Q(A) and ubiquinone Q(B) in the bacterial photosynthetic reaction center of Rhodopseudomona viridis 期刊论文  OAI收割 ACTA BOTANICA SINICA, 2002, 卷号: 44, 期号: 12, 页码: 1409-1417 作者:  Ma, SH;  Xu, H;  Zhang, RB;  Qu, ZW;  Zhang, XK   |  收藏  |  浏览/下载：8/0  |  提交时间：2019/04/09 Rhodopseudomena Viridis  Electron Transfer  Proton Transfer  q(a) And q(b)  Dft   AM1 and ab initio studies on the electron transfer reaction from Q(A) to Q(B) in the bacterial photosynthetic reaction center of Rhodo-pseudomonas viridis 期刊论文  OAI收割 ACTA CHIMICA SINICA, 2001, 卷号: 59, 期号: 12, 页码: 2042-2049 作者:  Ma, SH;  Xu, H;  Zhang, RB;  Qu, ZW;  Zhang, XK   |  收藏  |  浏览/下载：24/0  |  提交时间：2019/04/09 Bacterial Reaction Center  q(a) And q(b)  Electron Transfer  Am1  Dft