中国科学院机构知识库网格系统: 检索

Wide Dynamic Range, High Uniformity Spectral Irradiance Source for Calibration of Scientific-Grade, Large-Size Space Detectors 期刊论文 OAI收割
REMOTE SENSING, 2024, 卷号: 16
作者: Kong, Deyao; Yuan, Yinlin; Li, Haitao; Zhai, Wenchao; Zheng, Xiaobing

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收藏 | 浏览/下载：6/0 | 提交时间：2024/11/22

spectral irradiance source detector calibration high uniformity wide dynamic range integrating sphere deep space exploration

Space Debris Laser Ranging with range-gate-free Superconducting Nanowire Single-Photon Detector 期刊论文 OAI收割
JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS, 2023, 卷号: 19, 期号: 1
作者: Zhang HT(张海涛); Li YQ(李语强); Li ZL(李祝莲); Pi XY(皮晓宇); Yang YZ(杨永章)

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收藏 | 浏览/下载：51/0 | 提交时间：2023/03/13

Space Debris Laser Ranging The success probability of DLR Range-gate-free mode Superconducting Nanowire Single-Photon Detector

The update of BDS-2 TGD and its impact on positioning 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2020, 卷号: 65, 期号: 11, 页码: 2645-2661
作者: Zhang, Yize; Chen, Junping; Gong, Xiuqiang; Chen, Qian

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收藏 | 浏览/下载：32/0 | 提交时间：2021/12/06

Timing group delay Differential code bias Signal-in-space range error Single point positioning Precise point positioning

Calibration and Impact of BeiDou Satellite-Dependent Timing Group Delay Bias 期刊论文 OAI收割
REMOTE SENSING, 2020, 卷号: 12, 期号: 1, 页码: 17
作者: Zhang, Yize; Wang, Hu; Chen, Junping; Wang, Ahao; Meng, Lingdong

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收藏 | 浏览/下载：38/0 | 提交时间：2021/09/26

BeiDou navigation satellite system broadcast ephemeris timing group delay differential code bias signal-in-space range error single point positioning

Apparent clock and TGD biases between BDS-2 and BDS-3 期刊论文 OAI收割
GPS SOLUTIONS, 2019, 卷号: 24, 期号: 1, 页码: 15
作者: Zhang, Yize; Kubo, Nobuaki; Chen, Junping; Chu, Feng-Yu; Wang, Ahao

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收藏 | 浏览/下载：73/0 | 提交时间：2021/09/26

BeiDou navigation satellite system Timing group delay Signal-in-space range error Single-point positioning Real-time kinematic

Real-time BDS signal-in-space anomaly detection method considering receiver anomalies 期刊论文 OAI收割
IET RADAR SONAR AND NAVIGATION, 2019, 卷号: 13, 期号: 12, 页码: 2220-2229
作者: Fan, Lihong; Tu, Rui; Zhang, Rui; Zheng, Zengji; Liu, Jinhai

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收藏 | 浏览/下载：32/0 | 提交时间：2021/11/29

satellite navigation astronomical ephemerides telecommunication network reliability signal detection signal-in-space user range error SIS URE real-time navigation positioning users real-time SIS anomalies location services BeiDou satellites user range accuracy index navigation ephemeris anomaly detection threshold real-time observation data receiver anomalies BeiDou Navigation Satellite System MultiGlobal Navigation Satellite System Experiment precise ephemeris detection results real-time BDS signal-in-space anomaly detection method IURE international GNSS Monitoring & Assessment System

An Approach to Determining the Spatially Contiguous Zone of a Self-Organized Urban Agglomeration 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 12, 页码: 16
作者: Liu, Fei; Huang, Qing

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收藏 | 浏览/下载：59/0 | 提交时间：2019/08/07

urban agglomeration spatially contiguous zone space range identification self-organization fractal spatially contiguous zone molecule like assembly assembly radius

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

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收藏 | 浏览/下载：142/0 | 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.

Variation ranges of motion parameters for space debris in the geosynchronous ring 期刊论文 OAI收割
ASTROPHYSICS AND SPACE SCIENCE, 2016, 卷号: 361, 期号: 6
作者: Zhao, Chang-Yin; Zhang, Ming-Jiang; Yu, Sheng-Xian; Xiong, Jian-Ning; Zhang, Wei

收藏 | 浏览/下载：13/0 | 提交时间：2016/09/27

Space debris Geosynchronous ring Motion parameter Variation range

A framework of constraint preserving update schemes for optimization on Stiefel manifold 期刊论文 OAI收割
MATHEMATICAL PROGRAMMING, 2015, 卷号: 153, 期号: 2, 页码: 535-575
作者: Jiang, Bo; Dai, Yu-Hong

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收藏 | 浏览/下载：13/0 | 提交时间：2018/07/30

Stiefel manifold Orthogonality constraint Sphere constraint Range space Null space Barzilai-Borwein-like method Feasible Adaptive nonmonotone line search Low-rank correlation matrix Kohn-Sham total energy minimization Heterogeneous quadratic functions