中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共8条,第1-8条 帮助

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Breaking the Interaction Wall: A DLPU-Centric Deep Learning Computing System 期刊论文  OAI收割
IEEE TRANSACTIONS ON COMPUTERS, 2022, 卷号: 71, 期号: 1, 页码: 209-222
作者:  
Du, Zidong;  Guo, Qi;  Zhao, Yongwei;  Zeng, Xi;  Li, Ling
  |  收藏  |  浏览/下载:70/0  |  提交时间:2022/06/21
Control and Diagnostic System for CFETR CSMC Testing Platform 期刊论文  OAI收割
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2020, 卷号: 48
作者:  
Li, Tong;  Liu, Huajun;  Wu, Yu;  Wang, Weijun;  Li, Fangyi
  |  收藏  |  浏览/下载:69/0  |  提交时间:2020/10/26
食用蔬菜能吸收和积累微塑料 期刊论文  OAI收割
科学通报, 2019, 卷号: 64, 期号: 9, 页码: 928-934
作者:  
李连祯;  周倩;  尹娜;  涂晨;  骆永明
  |  收藏  |  浏览/下载:159/0  |  提交时间:2020/06/17
微塑料  生菜  聚苯乙烯微球  吸收  积累  健康风险  microplastics  lettuce  polystyrene microbeads  uptake  accumulation  human health risk  Microplastic (MP, 100 nm-5 mm) may present an attributable risk to ecosystem and human health, and its pollution has become a global environmental concern. Despite a wealth of information on the accumulation of MPs in aquatic species, there is no information on the uptake and accumulation of MPs by higher plants. Terrestrial edible plants are directly exposed to MPs when agricultural soil was applied with organic manure, sewage sludge as fertilizer or plastic mulching. In this paper, the uptake of two sizes of polystyrene (PS) microbeads (0.2 and 1.0 mum) and then their distribution and migration in an edible plant lettuce were firstly investigated based on laboratory experiments. We used fluorescent markers to track PS microbeads in plant tissues and found fluorescence to be a sensitive and reliable detection method. Sections from untreated control lettuce showed no autofluorescence. When roots were treated with fluorescently labeled PS microbeads, the microbeads could be identified by its fluorescence. Our main study investigated the uptake of 0.2 mum beads, as few luminescence signals were observed in lettuce roots for 1.0 mum beads in our experiment. We observed that 0.2 mum fluorescent microbeads were extracellularly trapped in the root cap mucilage (which is a highly hydrated polysaccharide) and a dark green tip (which was typical of lettuce roots exposed to label PS beads) was usually visible to the naked eye. Confocal images revealed that the PS luminescence signals were mainly located in the vascular system and on the cell walls of the cortex tissue of the roots, indicated that the beads passed through the intercellular space via the apoplastic transport system. Once inside the central cylinder, the 0.2 mum PS beads were transferred from the roots to the stems and leaves via the vascular system following the transpiration stream. We also observed that the PS beads adhered to one another and self-assembled systematically into grape-like and (chain) string-like clusters in the intercellular space of the root and stem vascular tissue of lettuce plant. In contrast to the root and stem, PS beads were dispersed in the leaf tissue. Here, for the first time we provide evidence of the adherence, uptake, accumulation, and translocation of submicrometer MPs within an edible plant. Our findings highlight the previously underappreciated human exposure pathway to MPs through the consumption of contaminated crops and emphasize the need for new management strategies to control the release of MPs waste products into the terrestrial environment. Ultimately, the potential impacts of low range sized MPs on food safety of crop plants and human health need to be urgently considered.  
The Central Control System for KTX 期刊论文  OAI收割
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2018, 卷号: 65, 期号: 8, 页码: 2357-2361
作者:  
Zhang, Z.;  Xiao, B.;  Wang, F.;  Ji, Z.;  Wang, Y.
  |  收藏  |  浏览/下载:30/0  |  提交时间:2019/11/11
Study of central control system for FAST 期刊论文  OAI收割
EXPERIMENTAL ASTRONOMY, 2013, 卷号: 36, 期号: 3, 页码: 569-589
作者:  
Wang, Jian;  Luo, Ming-Cheng;  Wu, Wen-Qing;  Liu, Jia-Jing;  Tang, Peng-Yi
收藏  |  浏览/下载:39/0  |  提交时间:2016/11/17
Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China
作者:  
Meng Z.;  Meng Z.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera  achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique  then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed  at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED  and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65  enhanced chromaticity uniformity of illumination field.  
Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文  OAI收割
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
作者:  
Meng Z.;  Meng Z.
收藏  |  浏览/下载:37/0  |  提交时间:2013/03/25
A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED  then achieved chroma coordinates error between the compounded white light and standard white light D65  until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed  at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65  enhanced chroma uniformity of illumination field.  
a multilevel reputation system for peer-to-peer networks 会议论文  OAI收割
6th International Conferernce on Grid and Cooperative Computing, Urumchi, PEOPLES R CHINA, AUG 16-18,
Xu Ziyao; He Yeping; Deng Lingli
  |  收藏  |  浏览/下载:33/0  |  提交时间:2011/06/29