中国科学院机构知识库网格系统: 检索

Precise Real-Time Navigation of the LT-1A Satellite Based on New BDS-3 B1C/B2a Signals 期刊论文 OAI收割
IEEE SENSORS JOURNAL, 2024, 卷号: 24, 期号: 6, 页码: 8551-8562
作者: Zhang, Wanwei; Gong, Xuewen; Wang, Fuhong; Xie, Song; Chen, Junli

|

收藏 | 浏览/下载：9/0 | 提交时间：2025/04/03

Broadcast ephemeris line-of-sight (LOS) error new B1C/B2a signals precise real-time navigation pseudoambiguity

The Effect of the Forging Process on the Microstructure and Mechanical Properties of a New Low-Cost Ti-5Al-1.5Mo-1.8Fe Alloy 期刊论文 OAI收割
MATERIALS, 2023, 卷号: 16, 期号: 14, 页码: 11
作者: Hu, Jinbao; Mu, Yiqiang; Xu, Qinsi; Yao, Nan; Li, Shujun

|

收藏 | 浏览/下载：15/0 | 提交时间：2024/01/08

a new low-cost titanium alloy forging microstructure mechanical properties fracture toughness

An Optimized Transformation System and Functional Test of CYC-Like TCP Gene CpCYC in Chirita pumila (Gesneriaceae) 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2021, 卷号: 22, 期号: 9
作者: Liu, Jing; Wang, Juan-Juan; Wu, Jie; Wang, Yang; Liu, Qi

|

收藏 | 浏览/下载：13/0 | 提交时间：2023/02/24

Chirita pumila CpCYC evo-devo functional test genetic transformation Gesneriaceae a new model

A new approach to the existence and regularity of linear equilibrium in a noisy rational expectations economy 期刊论文 OAI收割
JOURNAL OF MATHEMATICAL ECONOMICS, 2020, 卷号: 90, 页码: 119-126
作者: Lou, Youcheng; Wang, Shouyang

|

收藏 | 浏览/下载：41/0 | 提交时间：2021/01/14

Existence and regularity Rational expectations equilibrium A new approach

A New Palynological Assemblage from the Nenjiang Formation of Dayangshu Basin, and its Geological Implication 期刊论文 OAI收割
地质学报:英文版, 2020, 卷号: 000, 期号: 1.0, 页码: 198-199
作者: SUN Lei; WANG Chenglong; BIAN Xiongfei

|

收藏 | 浏览/下载：20/0 | 提交时间：2021/02/02

and its Geological Implication A New Palynological Assemblage from the Nenjiang Formation of Dayangshu Basin

Introducing a special collection of papers in the Journal of High Energy Astrophysics on the Early Results of China's 1st X-ray Astronomy Satellite: Insight-HXMT 期刊论文 OAI收割
Journal of High Energy Astrophysics, 2020, 卷号: 27, 页码: 51-52
作者: HXMT

|

收藏 | 浏览/下载：51/0 | 提交时间：2022/02/08

Astrophysics - High Energy Astrophysical Phenomena Abstract: Insight-HXMT is the first Chinese X-ray astronomical mission, launched successfully on June 15, 2017, from China's Jiuquan Satellite Launch Center. Insight-HXMT was designed to have a broad energy coverage in X-rays, from 1-250 keV, with excellent timing and adequate energy resolution at soft X-rays, and the largest effective area at hard X-rays. This allows, in particular, to observe bright sources like X-ray binaries (XRBs) in their bright/outburst states with high cadence and high statistics at hard and soft X-rays at once. It was then expected that the Insight-HXMT mission will bring us new insights regarding the characteristics of several source classes. Examples include characterizing High-Mass X-ray Binaries (HMXBs) and the outburst evolution of Low-Mass X-ray Binaries (LMXBs). For instance, in HMXB systems, the region around their Alfven radius that is responsible to determine whether accretion or propeller occurs, or the region around the NS magnetic pole where the intense X-rays are supposed to be produced are specially appealing targets of study. For the LMXBs, the evolution the outburst and the properties of the compact objects themselves are obvious priority targets for Insight-HXMT. Due to the broad coverage in energy, Insight-HXMT is specially well suited to study the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environment.

A new mechanism of atmospheric CO_2 absorption promoted by iron-nitrogen coupling in low-latitude oceans during ice age CNKI期刊论文 OAI收割
2020
作者: Jinming SONG; Qidong WANG

|

收藏 | 浏览/下载：1/0 | 提交时间：2024/12/18

A new mechanism of atmospheric CO_2 absorption promoted by iron-nitrogen coupling in low-latitude oceans during ice age

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：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.

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

|

收藏 | 浏览/下载：50/0 | 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.

A New Set of Parameters of High-Mass X-ray Binaries Found with their Cyclotron Lines 期刊论文 OAI收割
arXiv e-prints, 2018
作者: Zhang, Chengmin; Taani, Ali; Chaty, Sylvain; Karino, Shigeyuki; Song, Liming

|

收藏 | 浏览/下载：75/0 | 提交时间：2019/07/12

Astrophysics - High Energy Astrophysical Phenomena Abstract: We have derived new physical quantities for several High-Mass X-ray Binaries (HMXBs) with supergiant (SG) companions through their cyclotron lines. The parameters are: the terminal velocity of the wind, the mass loss rate of the donor, the effective temperature and the magnetic fields. These parameters influence significantly the improvement of the model of accretion. In spite of the variety of their observational properties, the corresponding magnetic field is around B ~ 10^12 G. This result can be constrained by the effects on stellar evolution. In addition, we have performed a segmentation in the parameter space of donors intended for several SG-HMXB listed in our sample set. The parameter space can be categorized into five regimes depending on the possibility of disk formation associated with accretion from the stellar wind. This can give a quantitative clarification of the observed variability and the properties of these objects. We show that, when these systems come into the direct accretion region, systems with corresponding parameters can emit X-rays.