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浏览/检索结果: 共19条，第1-10条 帮助

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Spatial distribution pattern of ore forming elements in the Bayan Obo deposit and exploration implications 期刊论文  OAI收割
ACTA PETROLOGICA SINICA, 2023, 卷号: 39, 期号: 10, 页码: 2895-2909
作者:  Yang KuiFeng;  Fan HongRui;  Qiu Zhenglie;  Li XiaoChun;  She HaiDong
  |  收藏  |  浏览/下载：32/0  |  提交时间：2023/12/27
C and Mn Elements Characterization and Stability of Retained Austenite in Different Locations of Quenching and Partitioning Bainite Steels 期刊论文  OAI收割
ACTA METALLURGICA SINICA, 2019, 卷号: 55, 期号: 3, 页码: 332-340
作者:  Tian Yaqiang;  Tian Geng;  Zheng Xiaoping;  Chen Liansheng;  Xu Yong
  |  收藏  |  浏览/下载：29/0  |  提交时间：2021/02/02
Geochemistry of environmentally sensitive trace elements in Permian coals from the Huainan coalfield, Anhui, China 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2011, 卷号: 88, 期号: 1, 页码: 41-54
作者:  Chen, J (Chen, Jian)[1,2];  Liu, GJ (Liu, Guijian)[1,2];  Jiang, MM (Jiang, Mengmeng)[1];  Chou, CL (Chou, Chen-Lin)[3];  Li, H (Li, Hui)[1]
  |  收藏  |  浏览/下载：27/0  |  提交时间：2019/01/07
Application of Synchrotron Radiation X-Ray Fluorescence to Investigating the Distribution of Trace Elements in Different Organs of Greenhouse Rape 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 卷号: 30, 期号: 2, 页码: 554-558
作者:  Xin, SZ;  Song, YJ;  Lu, C;  Rui, YK;  Xu, W
收藏  |  浏览/下载：122/0  |  提交时间：2016/06/28
Novel method for optimizing polishing tool-path in CCOS based on weighted-iterative algorithm (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  Zhang X.-J.;  Wang X.;  Wang X.;  Wang X.;  Wang X.-K.
收藏  |  浏览/下载：48/0  |  提交时间：2013/03/25
In Computer Controlled Optical Surfacing (CCOS)  polishing tool-path is the base of solving other control parameters such as dwell time. In order to improve the fabrication results of polishing off-axis aspheric  a novel method to optimize the tool-path is discussed in this paper. The optimizing method named weighted-iterative algorithm is according to the balance principle of the particle system. The power factor of each dwell point represents the requirement of dwell density. Considering the factors which influence the polishing result  the power factors cosist of three elements include constant  error distribution and dwell distance of workpiece edge. The tool-path is solved by numerical iterative method. In the end  an error data is simulated with actual parameters using the matrix-based algorithm with two different tool-paths. The one is X-Y uniform spacing model and the other one is to optimize it based on the first. The comparison shows that the results of the optimized one are much better than traditional one  especially the rms convergence rate. Theory of the algorithm is simple and exercisable  and it satisfies practical requirement as well. 2009 SPIE.  
Application of synchrotron radiation X-ray fluorescence to investigate the distribution of mineral elements in different organs of greenhouse spinach 期刊论文  OAI收割
HORTICULTURAL SCIENCE, 2009, 卷号: 36, 期号: 4, 页码: #REF!
作者:  Xin, SZ;  Song, YJ;  Lv, C;  Rui, YK;  Zhang, FS
收藏  |  浏览/下载：30/0  |  提交时间：2016/04/12
A novel bottom-emitting vcsel's one-dimension array (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China
作者:  Wang L.;  Wang L.;  Wang L.;  Liu Y.;  Liu Y.
收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25
A novel 980nm bottom-emitting VCSELs array with high power density and good beam property of Gaussian far-field distribution is reported. This array is composed of 5 symmetrically-arranged elements of 200m  150m and 100m-diameter  with the center spacings of 300m and 250m respectively. The maximum power is 880mW at a current of 4A  corresponding to lKW/cm2 average optical power density. The differential resistance is 0.09 with a threshold of 0.56A. The novel array is compared with a 300m-aperture-size single device and a 44 2-D array with 50m element aperture size and 250m centre spacing. The three devices have the same lasing area. The conclusion is that the novel array is better in the property of output power  threshold current  lasing spectra  far-field distribution etc. 2008 SPIE.  
Design of optical elements for imaging the earth's plasmasphere (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, September 9, 2007 - September 12, 2007, Beijing, China
作者:  Chen B.;  Chen B.;  Wang X.-K.
收藏  |  浏览/下载：40/0  |  提交时间：2013/03/25
Studying the distribution of He+ in Earth's plasmasphere by detecting its resonantly-scattered emission at 304A will record the structure and dynamics of the cold plasma in Earth's plasmasphere on a global scale. EUV imaging systems usually utilizes near normal incidence optics including multilayer mirror and filter. In this paper  the space condition of the Earth's plasmasphere to confirm the expected performance of mirror and filter for this task were analyzed and some guidelines for the design of the optical elements were introduced. In order to achieve higher response at 304A and reduce 584A radiation for the optical system  a new multilayer coating of Mo/Si with UOx (x=2-3) was developed  and it is indicated that promising filter material is Al/C with a nickel mesh. In addition  we compute the reflectance of multilayer mirror based on optical constants and the transmission of the filter based on atomic scattering factor. The results show the multilayer mirror has high reflectance of 26.27% at 304 Aand low reflectance of 0.60% at 584A. Finally  the conversion efficiency of mirror coupled with filter is 6.88% at 304A and 0.01% at 584 A.  
The relationship between geography and climate in thegeneric-level patterns of Chinese seed plants 期刊论文  OAI收割
植物分类学报, 2007, 卷号: 45, 期号: 2, 页码: 134-166
作者:  HU Hua-Bin;  MA You-Xin;  ZHU Hua
收藏  |  浏览/下载：23/0  |  提交时间：2012/06/11
The relationship between geography and climate in the generic-level patterns of Chinese seed plants 期刊论文  OAI收割
Acta Phytotaxonomica Sinica, 2007, 卷号: 45, 期号: 2, 页码: 134-166
作者:  ZHU Hua*
收藏  |  浏览/下载：16/0  |  提交时间：2012/03/30