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Chinese Academy of Sciences Institutional Repositories Grid
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Features Combined Binary Descriptor Based on Voted Ring-Sampling Pattern 期刊论文  OAI收割
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, 2020, 卷号: 30, 期号: 10, 页码: 3675-3687
作者:  
Liu, Hongmin;  Zhang, Qianqian;  Fan, Bin;  Wang, Zhiheng;  Han, Junwei
  |  收藏  |  浏览/下载:25/0  |  提交时间:2021/01/07
Sampling Time Adaptive Single-Photon Compressive Imaging 期刊论文  OAI收割
IEEE PHOTONICS JOURNAL, 2019, 卷号: 11, 期号: 3
作者:  
Wang, Hui;  Yan, Qiurong;  Li, Bing;  Yuan, Chenglong;  Wang, Yuhao
  |  收藏  |  浏览/下载:95/0  |  提交时间:2019/06/27
黄海桑沟湾水体及沉积物中微塑料污染特征研究 期刊论文  OAI收割
海洋环境科学, 2019, 卷号: 38, 期号: 2, 页码: 198-204
作者:  
熊宽旭;  赵新月;  周倩;  付传城;  涂晨
  |  收藏  |  浏览/下载:40/0  |  提交时间:2020/06/17
桑沟湾  微塑料  潮滩  丰度  空间分布  Sanggou bay  microplastics  tidal flats  abundance  spatial distribution  In recent years,research on microplastics pollution in the marine environment has been increasing,but studies on microplastics in water bodies and sediments of the bay under the influence of high-intensity human activities are still rarely reported. In this study,the pollution characteristics of microplastics in the wayer and sediments of Sanggou bay were investigated in December 2017,after the harvest of large-scale aquaculture,with the aim to study the effects of aquaculture activities and hydrodynamics on pollution characteristics and spatial distribution of microplastics in the bay. The results showed that the types of microplastics in the water and sediments of Sanggou bay were mainly fibers,fragments,films,foams and particles. The microplastic abundances in the water and sediments were 1.8 ~ 31.2 N/L,31.2 ~ 1246.8 N/kg,respectively. The average particle sizes of microplastics in water and sediments were 0.51 0.20 mm and 1.54 1.02 mm,respectively. The results of spatial distribution of microplastics in Sanggou bay showed that the high abundance area mainly appears in the inshore waters,and the abundance of microplastics tends to decrease from the inner areas of estuary to the outshore areas. The heterogeneity of microplastic abundance and spatial distribution in Sanggou bay is mainly affected by human activities such as aquaculture,living and shipping,as well as hydrodynamics. In the future,fine sampling and analysis are needed to fully understand the temporal and spatial distribution of microplastics pollution in the bay areas.  
Spatial variation of plant species richness in a sand dune field of northeastern Inner Mongolia, China 期刊论文  OAI收割
JOURNAL OF ARID LAND, 2016, 卷号: 8, 期号: 3, 页码: 434-442
作者:  
Xing Baozhen;  Wu Jing;  Hou Xianzhang;  Qian Jianqiang;  Busso, Carlos A.
  |  收藏  |  浏览/下载:20/0  |  提交时间:2019/06/04
Probabilistic modeling of rockfall trajectories: a review SCI/SSCI论文  OAI收割
2015
作者:  
Li L. P.;  Lan, H. X.
收藏  |  浏览/下载:60/0  |  提交时间:2015/12/09
A design of beam shaping unit for 193nm lithography illumination system using angular spectrum theory (EI CONFERENCE) 会议论文  OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者:  
Zhao Y.;  Zhang W.;  Zhang W.;  Li S.;  Gong Y.
收藏  |  浏览/下载:17/0  |  提交时间:2013/03/25
Off-axis illumination (OAI) technology is widely used to enhance resolution for deep ultraviolet lithography. The realizing methods of OAI include geometrical optics method and physical optics method. However  the former has the disadvantage of weak intensity distribution controlling ability  and the latter introduces simulation errors evidently when dealing with near field diffraction propagation. A diffractive optical element (DOE) designing method using plane wave angular spectrum theory is presented in this paper. Several kinds of OAI modes at near field away from DOE can be realized  and simulation errors and the size of illuminator are also reduced. According to studying the relationships of the sampling point distance of DOE  light beam propagation distance  and the structure of the beam shaping unit  a method of determining the designing parameters is discussed. Using this method  several illumination modes are realized  and simulation results show that all diffraction efficiencies reach up to 84%. The method of DOE manufacturing is analyzed at last  and it is proven to be feasible. 2010 SPIE.