中国开放科研知识云: 检索

Reliability assessment of reinforced concrete in harsh western environment based on gamma random process 期刊论文
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology), 2020, 卷号: 51, 期号: 5, 页码: 1384-1390
作者: Qiao, Hongxia; Yang, Bo; Lu, Chenggong; Zhu, Binrong

收藏 | 浏览/下载：2/0 | 提交时间：2022/02/17

Concrete construction Corrosion resistance Electrochemical corrosion Magnesium compounds Random processes Sodium chloride Steel corrosion Sulfur compounds Long-term follow-up study Long-term immersions Magnesium sulfate Multi factors Observed data Reliability assessments Soil environment Steel in concretes

Reliability assessment of reinforced concrete in harsh western environment based on gamma random process 期刊论文
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology), 2020, 卷号: 51, 期号: 5, 页码: 1384-1390
作者: Qiao, Hongxia; Yang, Bo; Lu, Chenggong; Zhu, Binrong

收藏 | 浏览/下载：12/0 | 提交时间：2020/11/14

Concrete construction Corrosion resistance Electrochemical corrosion Magnesium compounds Random processes Sodium chloride Steel corrosion Sulfur compounds Long-term follow-up study Long-term immersions Magnesium sulfate Multi factors Observed data Reliability assessments Soil environment Steel in concretes

Access to hospitals: Potential vs. observed 期刊论文
CITIES, 2020, 卷号: 100, 页码: 12
作者: Wang, Jiaoe; Du, Fangye; Huang, Jie; Liu, Yu

收藏 | 浏览/下载：3/0 | 提交时间：2021/03/23

Observed hospital accessibility Taxi trip Catchment area Travel behavior Big data

Improving Princeton Forcing Dataset over Iran Using the Delta-Ratio Method 期刊论文
WATER, 2020, 卷号: 12, 期号: 3, 页码: 15
作者: Zhang, Qinghuan; Tang, Qiuhong; Liu, Xingcai; Hosseini-Moghari, Seyed-Mohammad; Attarod, Pedram

收藏 | 浏览/下载：6/0 | 提交时间：2021/03/23

Iran meteorological forcing data observed data precipitation wind speed

Study of satellite shadow function model considering the overlapping parts of Earth shadow and Moon shadow and its application to GPS satellite orbit determination 期刊论文
ADVANCES IN SPACE RESEARCH, 2019, 卷号: 63, 期号: 9, 页码: 2912-2929
作者: Zhang, Rui; Tu, Rui; Zhang, Pengfei; Liu, Jinhai; Lu, Xiaochun

收藏 | 浏览/下载：7/0 | 提交时间：2021/11/29

Shadow function model Overlapping shadows Shadow factor Observed orbit determination Predicted orbit determination Accuracy comparison

In-Field Calibration Method for DTG IMU Including g-Sensitivity Biases 期刊论文
IEEE SENSORS JOURNAL, 2019, 卷号: 19, 页码: 4972-4981
作者: Dai, Miaomiao; Zhang, Chunxi; Lu, Jiazhen

收藏 | 浏览/下载：3/0 | 提交时间：2019/12/30

DTG G-sensitivity biases in-field calibration Kalman filter norm-observed method UKF

Back-Analysis for the Elasto-Viscoplastic Parameters of Landslides Based on the Observed Displacements: A Case Study of the Wujiang Landslide, China 期刊论文
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, 2019, 卷号: 44, 期号: 5, 页码: 4639-4651
作者: Huang, Yaoying; Li, Chunguang

收藏 | 浏览/下载：21/0 | 提交时间：2020/04/08

Landslide Slip band Observed displacement Elasto-viscoplastic parameter Back-analysis

食用蔬菜能吸收和积累微塑料 期刊论文
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：63/0 | 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.

Constant cyclotron line energy in Hercules X-1 - Joint Insight-HXMT and NuSTAR observations 期刊论文
Journal of High Energy Astrophysics, 2019, 卷号: 23, 页码: 29-32
作者: HXMT

收藏 | 浏览/下载：42/0 | 提交时间：2022/02/08

Stars: neutron star Pulsars: binary(Her X-1) X-rays: stars Astrophysics - High Energy Astrophysical Phenomena Abstract: The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between Insight-HXMT and NuSTAR performed in February 2018. Generally, the two satellites show well consistent results of timing and spectral properties. The joint spectral analysis confirms that the previously observed long decay phase has ended, and that the line energy instead keeps constant around 37.5 keV after flux correction.

Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat 期刊论文
Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40
作者: HXMT

收藏 | 浏览/下载：46/0 | 提交时间：2022/02/08

Accretion accretion disks Black hole physics X-rays: binaries: Swift J1658.2-4242 Astrophysics - High Energy Astrophysical Phenomena Abstract: We present the observational results from a detailed timing analysis of the black hole candidate Swift J1658.2-4242 during its 2018 outburst with the observations of Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star Interior Composition Explorer (NICER) and AstroSat in 0.1-250 keV. The evolution of intensity, hardness and integrated fractional root mean square (rms) observed by Insight-HXMT and NICER are presented in this paper. Type-C quasi-periodic oscillations (QPOs) observed by NICER (0.8-3.5 Hz) and Insight-HXMT (1-1.6 Hz) are also reported in this work. The features of the QPOs are analyzed with an energy range of 0.5-50 keV. The relations between QPO frequency and other characteristics such as intensity, hardness and QPO rms are carefully studied. The timing and spectral properties indicate that Swift J1658.2-4242 is a black hole binary system. Besides, the rms spectra of the source calculated from the simultaneous observation of Insight-HXMT, NICER and AstroSat support the Lense-Thirring origin of the QPOs. The relation between QPO phase lag and the centroid frequency of Swift J1658.2-4242 reveals a near zero constant when < 4Hz and a soft phase lag at 6.68 Hz. This independence follows the same trend as the high inclination galactic black hole binaries such as MAXI J1659-152.

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