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Hyperspectral Differences Between New and Old Leaves of Dominant Tree Species in Changbai Mountain 期刊论文  OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 卷号: 44, 期号: 8, 页码: 2372-2380
作者:  Chen Jun-Jie;  Yu Quan-Zhou;  Tang Qing-Xin
  |  收藏  |  浏览/下载：30/0  |  提交时间：2024/10/21
Characteristics of Global Ocean Abnormal Mesoscale Eddies Derived From the Fusion of Sea Surface Height and Temperature Data by Deep Learning 期刊论文  OAI收割
GEOPHYSICAL RESEARCH LETTERS, 2021, 卷号: 48, 期号: 17, 页码: 11
作者:  Liu, Yingjie;  Zheng, Quanan;  Li, Xiaofeng
  |  收藏  |  浏览/下载：30/0  |  提交时间：2021/11/30
Characteristics of inter-system biases in Multi-GNSS with precise point positioning 期刊论文  OAI收割
ADVANCES IN SPACE RESEARCH, 2019, 卷号: 63, 期号: 12, 页码: 3777-3794
作者:  Hong, Ju;  Tu, Rui;  Gao, Yaping;  Zhang, Rui;  Fan, Lihong
  |  收藏  |  浏览/下载：16/0  |  提交时间：2021/11/29
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：45/0  |  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.  
Experimental study on the performance characteristics of viscous debris flows with a grid-type dam for debris flow hazards mitigation 期刊论文  OAI收割
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2019, 卷号: 78, 期号: 8, 页码: 5763-5774
作者:  Yuan Dong;  Liu Jinfeng;  You Yong;  Zhang Guangze;  Wang Dong
  |  收藏  |  浏览/下载：49/0  |  提交时间：2020/02/28
Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat 期刊论文  OAI收割
Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40
作者:  HXMT
  |  收藏  |  浏览/下载：61/0  |  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.  
Spatial and temporal patterns as well as major influencing factors of global and diffuse Horizontal Irradiance over China: 1960-2014 期刊论文  OAI收割
SOLAR ENERGY, 2018, 卷号: 159, 页码: 601-615
作者:  Wang, Hong;  Sun, Fubao;  Liu, Wenbin
  |  收藏  |  浏览/下载：24/0  |  提交时间：2019/05/30
Spatial and temporal patterns as well as major influencing factors of global and diffuse Horizontal Irradiance over China: 1960-2014 期刊论文  OAI收割
SOLAR ENERGY, 2018, 卷号: 159, 页码: 601-615
作者:  Wang, Hong;  Sun, Fubao;  Liu, Wenbin
  |  收藏  |  浏览/下载：17/0  |  提交时间：2019/05/30
Spatial and temporal patterns as well as major influencing factors of global and diffuse Horizontal Irradiance over China: 1960-2014 期刊论文  OAI收割
SOLAR ENERGY, 2018, 卷号: 159, 页码: 601-615
作者:  Wang, Hong;  Sun, Fubao;  Liu, Wenbin
  |  收藏  |  浏览/下载：23/0  |  提交时间：2019/05/30
Structural design of primary mirror subassembly for space telescope (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan
作者:  Xu H.
收藏  |  浏览/下载：68/0  |  提交时间：2013/03/25
In order to design a large aperture primary mirror with the diameter of 1150 mm  the parameters impacting on gravity deformation of the mirror were analyzed and discussed in detail  including material selection  diameter-thickness ratio  the number of the support points  location selection and lightweight structure  etc. A novel space mirror structure system was put forward  and its back was opened and supported by six points on back. The dynamic and static and thermal characteristics were analyzed based on the finite element method. Analysis results showed the surface figure accuracy reached to RMS 14.5nm under the action of gravity load along the optical axis direction and the first-order natural frequency was 214Hz which met to the designed indexes requirements. (2013) Trans Tech Publications  Switzerland.