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Chinese Academy of Sciences Institutional Repositories Grid
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The development and applications of a controllable lander for in-situ, long-term observation of deep sea chemosynthetic communities 期刊论文  OAI收割
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 2023, 卷号: 193, 页码: 12
作者:  
Du, Zengfeng;  Zhang, Xiong;  Lian, Chao;  Luan, Zhendong;  Xi, Shichuan
  |  收藏  |  浏览/下载:11/0  |  提交时间:2023/12/13
Contribution of complementary operation in adapting to climate change impacts on a large-scale wind-solar-hydro system: A case study in the Yalong River Basin, China 期刊论文  OAI收割
APPLIED ENERGY, 2022, 卷号: 325, 页码: 14
作者:  
Cheng, Qian;  Liu, Pan;  Xia, Jun;  Ming, Bo;  Cheng, Lei
  |  收藏  |  浏览/下载:54/0  |  提交时间:2022/10/08
Comparison of simulated backgrounds with in-orbit observations for HE, ME, and LE onboard Insight-HXMT 期刊论文  OAI收割
Astrophysics and Space Science, 2020, 卷号: 365, 页码: 158
作者:  
HXMT
  |  收藏  |  浏览/下载:48/0  |  提交时间:2022/02/08
Insight-HXMT  Geant4 simulation  Background observation  Astrophysics  - Instrumentation and Methods for Astrophysics  Abstract: Insight-HXMT, the first X-ray astronomical satellite in China, aims to reveal new sources in the Galaxy and to study fundamental physics of X-ray binaries from 1 to 250 keV. It has three collimated telescopes, the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME), and the Low Energy X-ray telescope (LE). Before the launch, in-orbit backgrounds of these three telescopes had been estimated through Geant4 simulation, in order to investigate the instrument performance and the achievement of scientific goals. In this work, these simulated backgrounds are compared with in-orbit observations. Good agreements are shown for all three telescopes. For HE, (1) the deviation of the simulated background rate after two years of operation in space is 5 % from the observation  (2) the total background spectrum and the relative abundance of the 67 keV line show long-term increases both in simulations and observations. For ME, (1) the deviation of simulated background rate is within 15 % from the observation, and (2) there are no obvious long-term increase features in the background spectra of simulations and observations. For LE, the background level given by simulations is also consistent with observations. The consistencies of these comparisons validate that the Insight-HXMT mass model, i.e., space environment components and models adopted, physics processes selected, and detector constructions built, is reasonable. However, the line features at 7.5 and 8.0 keV, which are obvious in the observed spectra of LE, are not evident in simulations. This might result from uncertainties in the LE constructions.  
Conceptual study of an accelerator-driven ceramic fast reactor with long-term operation 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF ENERGY RESEARCH, 2018, 卷号: 42, 页码: 1693-1701
作者:  
Gao, Xiaofei;  Zhang, Yaling;  Zhang, Xunchao;  Yan, Xuesong;  Yang, Yangyang
  |  收藏  |  浏览/下载:34/0  |  提交时间:2018/05/31
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:27/0  |  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.