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The Impact of Internet Use on Perception of the Poor-Rich Gap: Empirical Evidence from China 期刊论文
SUSTAINABILITY, 2022, 卷号: 14, 期号: 6
作者:  Zuo, Xiaofan;  Hong, Zhisheng
收藏  |  浏览/下载：17/0  |  提交时间：2023/05/30
WELL-POSEDNESS AND THE MULTISCALE ALGORITHM FOR HETEROGENEOUS SCATTERING OF MAXWELL'S EQUATIONS IN DISPERSIVE MEDIA 期刊论文
INTERNATIONAL JOURNAL OF NUMERICAL ANALYSIS AND MODELING, 2021, 卷号: 18, 期号: 2, 页码: 235-264
作者:  Zhang, Yongwei;  Cao, Liqun;  Shi, Dongyang
收藏  |  浏览/下载：43/0  |  提交时间：2021/04/26
Detection of two bright radio bursts from magnetar SGR 1935 + 2154 期刊论文
Nature Astronomy, 2021, 卷号: 5, 页码: 414
作者:  Kirsten, F.;  Snelders, M. P.;  Jenkins, M.;  Nimmo, K.;  van den Eijnden, J.
收藏  |  浏览/下载：46/0  |  提交时间：2021/11/18
Astrophysics - High Energy Astrophysical Phenomena  Abstract: Fast radio bursts are millisecond-duration, bright radio signals (fluence 0.1-100 Jy ms) emitted from extragalactic sources of unknown physical origin. The recent CHIME/FRB and STARE2 detection of an extremely bright (fluence ~MJy ms) radio burst from the Galactic magnetar SGR 1935+2154 supports the hypothesis that (at least some) fast radio bursts are emitted by magnetars at cosmological distances. In follow-up observations totalling 522.7 h on source, we detect two bright radio bursts with fluences of 112 ± 22 Jy ms and 24 ± 5 Jy ms, respectively. Both bursts appear to be affected by interstellar scattering and we measure significant linear and circular polarization for the fainter burst. The bursts are separated in time by ~1.4 s, suggesting a non-Poissonian, clustered emission processsimilar to those seen in some repeating fast radio bursts. Together with the burst reported by CHIME/FRB and STARE2, as well as a much fainter burst seen by FAST (fluence 60 mJy ms), our observations demonstrate that SGR 1935+2154 can produce bursts with apparent energies spanning roughly seven orders of magnitude, and that the burst rate is comparable across this range. This raises the question of whether these four bursts arise from similar physical processes, and whether the fast radio burst population distribution extends to very low energies (~1030 erg, isotropic equivalent).  
A Newly Discovered Oil-bearing Mesoproterozoic Erathem within the Niu D1 Well, Liaoxi Depression, Yanliao Faulted Depression Zone, NE China 期刊论文
地质学报:英文版, 2020, 卷号: 0.0, 期号: 1.0, 页码: 202-203
作者:  SUN Qiushi;  GAO Xiaoyong;  ZONG Wenming;  SUN Shouliang;  ZHANG Tao
收藏  |  浏览/下载：22/0  |  提交时间：2021/02/02
近海环境中抗生素分析样品前处理技术的研究进展 期刊论文
色谱, 2020, 卷号: 38, 期号: 1, 页码: 95-103
作者:  吕敏;  陈令新
收藏  |  浏览/下载：117/0  |  提交时间：2020/07/08
抗生素  近海  前处理技术  综述  antibiotics  coastal  pretreatment techniques  review  The widespread and massive usage of antibiotics for the prevention and treatment of diseases in human and animals have resulted in their continuous discharge into the environment, and finally, into the coastal environment through various pathways. Accumulation of antibiotics in aquatic organisms poses a great threat to ecological and human health, especially because it facilitates the generation and spread of bacterial resistance. Given the diverse range of antibiotics with various features, as well as their presence at low concentrations in the environment, it is imperative to develop pretreatment techniques for antibiotics in various matrices. In this paper, the pretreatment methods proposed in recent decades for antibiotics in coastal water, sediment, and biota are summarized, with emphasis on commonly used methods such as solid-phase extraction, solid-liquid extraction, matrix solid-phase dispersion, and QuEChERS. Additionally, the potential factors influencing the extraction performance and clean-up efficiency are analyzed. The advantages and disadvantages of the methods and their development are finally discussed.  
Palladium-Catalyzed Propargylic [n+2] Cycloaddition: An Efficient Strategy for Construction of Benzo-Fused Medium-Sized Heterocycles 期刊论文
ADVANCED SYNTHESIS & CATALYSIS, 2019, 卷号: 361, 期号: 4, 页码: 836-841
作者:  Liu, Zhen-Ting;  Hu, Xiang-Ping
收藏  |  浏览/下载：53/0  |  提交时间：2019/06/20
Palladium-catalyzed propargylic [n+2] cycloaddition: an efficient strategy for construction of benzo-fused medium-sized heterocycles 期刊论文
Advanced synthesis & catalysis, 2019, 卷号: 361, 期号: 4, 页码: 836-841
作者:  Liu, Zhen-Ting;  Hu, Xiang-Ping
收藏  |  浏览/下载：81/0  |  提交时间：2019/05/08
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
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：38/0  |  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.  
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
Collapse mechanism of the overlying strata above a salt cavern by solution mining with double-well convection 期刊论文
ENVIRONMENTAL EARTH SCIENCES, 2018, 卷号: 77, 期号: 16, 页码: -
作者:  Zhang, Guimin;  Wang, Zhenshuo;  Zhang, Kai;  Li, Yinping;  Wu, Yu
收藏  |  浏览/下载：33/0  |  提交时间：2020/04/08

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