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浏览/检索结果: 共16条，第1-10条 帮助

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A Study on Mineral Material Sources of Multi-Style Bronzes Collected by Cultural Relic Administration Center of Huili County, Sichuan Province With MC-ICP-MS 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 卷号: 43, 期号: 4, 页码: 1140-1146
作者:  Bi Yan-qi;  Yang Ying-dong;  Du, Jing;  Tang, Xiang;  Luo Wu-gan
  |  收藏  |  浏览/下载：20/0  |  提交时间：2023/11/02
Debris flow susceptibility based on the connectivity of potential material sources in the Dadu River Basin 期刊论文  OAI收割
ENGINEERING GEOLOGY, 2023, 卷号: 312, 页码: 14
作者:  Liang, Xinyue;  Ge, Yonggang;  Zeng, Lu;  Lyu, Liqun;  Sun, Qingmin
  |  收藏  |  浏览/下载：59/0  |  提交时间：2023/01/11
The Lithospheric Structure in the South China Block from Receiver Function: Implications for the Source of Mineral System 期刊论文  OAI收割
ACTA GEOLOGICA SINICA-ENGLISH EDITION, 2021, 卷号: 95, 页码: 28-30
作者:  Chen Changxin;  Lv Qingtian;  Chen Ling;  Shi Danian;  Yan Jiayong
  |  收藏  |  浏览/下载：24/0  |  提交时间：2022/07/04
Depositional environment and origin of the Lilaozhuang Neoarchean BIF-hosted iron-magnesite deposit on the southern margin of the North China Craton 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF EARTH SCIENCES, 2017, 卷号: 106, 期号: 5, 页码: 1753-1772
作者:  Huang, Hua;  Zhang, LianChang;  Fabre, Sebastien;  Wang, ChangLe;  Zhai, MingGuo
  |  收藏  |  浏览/下载：24/0  |  提交时间：2017/11/16
Collimator at end of ring to target beam transport 期刊论文  OAI收割
HIGH POWER LASER AND PARTICLE BEAMS, 2015, 卷号: 27, 期号: 5, 页码: 55104
作者:  Wang ZH(王梓豪)
收藏  |  浏览/下载：27/0  |  提交时间：2016/04/18
重庆市渝北区暴雨径流污染特征及河流水质动态研究 学位论文  OAI收割
博士, 北京: 中国科学院研究生院, 2013
张千千
收藏  |  浏览/下载：141/0  |  提交时间：2014/07/09
Geology and sulfur isotope geochemistry of Dafulou tin-polymetallic deposit in Dachang orefield, Guangxi, China 期刊论文  OAI收割
Journal of Central South University, 2013, 卷号: 20, 期号: 10, 页码: 2811-2818
Yong-sheng Cheng
收藏  |  浏览/下载：18/0  |  提交时间：2014/04/18
The calibration of faint simulation star magnitude based on single photon count technique (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China
作者:  Xu S.-Y.;  Guo J.;  Guo J.
收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25
A calibration method of faint star magnitude of the star scene simulation device is proposed in this paper. In the research of simulation star magnitude  luminometers and CCD devices are the general calibration devices which are used to measure the illumination intensity and calibrate its magnitude. But if the simulation magnitude is only sixth magnitude  its illumination intensity is only 1.010-8 Lux. This illumination intensity level is the lowest illumination intensity that the commercial luminometer can detect. Hence the simulation star magnitude lower than six magnitude cannot be calibrated by luminoters. Likewise CCD devices also need an additive cooler in this case. When the single photon characteristic is presented due to the low luminosity of simulating light sources  the simulation star magnitude can be calibrated by detecting its photon flux of radiation with the method of single photon count. In this paper the detection principle of single photon based on a compact designed PMT detecting of the radiation level of simulation star magnitude is advanced. Especially a spectrum match method is proved theoretically to be an effective means for selecting PMT photosensitive type. In the case of the detection object of the simulation star in visible wavelength  a analysis indicates that the material of tri-alkali cathode materials its best choice after being compared the Signal-to-Noise of photon detector of several PMT photosensitive materials based on the different spectrum match ratio of different object light sources and different cathode materials. An experiment is employed to show the relationship of control voltage of PMT and its dark counter  the relationship of the environment temperature of PMT and its dark counter  which proves its only decades of CPS at room temperature. The so low dark counter avoids a bulky cooler and is convenient for installing it on the star scene simulation equipment. Finally in the experiment of calibrating the simulation star magnitudes the ability of its calibration is confirmed to reaches up to 12m  meanwhile its calibration error is within 0.2m. 2009 SPIE.  
Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing. 期刊论文  OAI收割
ACTA PETROLOGICA SINICA, 2006, 卷号: 22, 期号: 1, 页码: 145-152
作者:  Wan, B;  Zhang, LC
  |  收藏  |  浏览/下载：7/0  |  提交时间：2018/09/26
Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing. 期刊论文  OAI收割
ACTA PETROLOGICA SINICA, 2006, 卷号: 22, 期号: 1, 页码: 145-152
作者:  Wan, B;  Zhang, LC
  |  收藏  |  浏览/下载：15/0  |  提交时间：2018/09/26