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浏览/检索结果: 共20条，第1-10条 帮助

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Influences of fluid physical properties, solid particles, and operating conditions on the hydrodynamics in slurry reactors 期刊论文  OAI收割
CHINESE JOURNAL OF CHEMICAL ENGINEERING, 2022, 卷号: 44, 页码: 51-71
作者:  Yang, He;  Chen, Aqiang;  Geng, Shujun;  Cheng, Jingcai;  Gao, Fei
  |  收藏  |  浏览/下载：47/0  |  提交时间：2022/06/15
Physical Modeling for Large-Scale Landslide with Chair-Shaped Bedrock Surfaces under Precipitation and Reservoir Water Fluctuation Conditions 期刊论文  OAI收割
WATER, 2022, 卷号: 14, 期号: 6, 页码: 21
作者:  Pan, Shangtao;  Gao, Wei;  Hu, Ruilin
  |  收藏  |  浏览/下载：34/0  |  提交时间：2022/07/06
Hierarchical Urban Land Mappings and Their Distribution with Physical Medium Environments Using Time Series of Land Resource Images in Beijing, China (1981-2021) 期刊论文  OAI收割
REMOTE SENSING, 2022, 卷号: 14, 期号: 3, 页码: 27
作者:  Pan, Tao;  Kuang, Wenhui;  Pan, Ruoyi;  Niu, Zhenguo;  Dou, Yinyin
  |  收藏  |  浏览/下载：32/0  |  提交时间：2022/09/21
Hierarchical Urban Land Mappings and Their Distribution with Physical Medium Environments Using Time Series of Land Resource Images in Beijing, China (1981-2021) 期刊论文  OAI收割
REMOTE SENSING, 2022, 卷号: 14, 期号: 3, 页码: 27
作者:  Pan, Tao;  Kuang, Wenhui;  Pan, Ruoyi;  Niu, Zhenguo;  Dou, Yinyin
  |  收藏  |  浏览/下载：21/0  |  提交时间：2022/09/21
No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文  OAI收割
Nature, 2020, 卷号: 587, 页码: 63-65
作者:  HXMT
  |  收藏  |  浏览/下载：44/0  |  提交时间：2022/02/08
Astrophysics - High Energy Astrophysical Phenomena  Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources4-13, but no convincing evidence has been collected so far14. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts15. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.  
真盐生植物炭特性及其对酸性土壤改良应用的研究 学位论文  OAI收割
北京: 中国科学院大学, 2019
作者:  毛明月
  |  收藏  |  浏览/下载：56/0  |  提交时间：2021/12/10
Environmental characteristics of annual pico/nanophytoplankton blooms along the Qinhuangdao Coast CNKI期刊论文  OAI收割
2018
作者:  Cao XH(曹西华);  Yu ZM(俞志明);  Wu ZX(吴在兴);  Cheng FJ(程芳晋);  He LY(贺立燕)
  |  收藏  |  浏览/下载：1/0  |  提交时间：2024/12/18
Environmental characteristics of annual pico_nanophytoplankton blooms along the Qinhuangdao Coast 期刊论文  OAI收割
JOURNAL OF OCEANOLOGY AND LIMNOLOGY, 2018, 卷号: 36, 期号: 2, 页码: 281-292
作者:  Cao Xihua;  Yu Zhiming;  Wu Zaixing;  Cheng Fangjin;  He Liyan
  |  收藏  |  浏览/下载：50/0  |  提交时间：2019/07/15
Environmental characteristics of annual pico/nanophytoplankton blooms along the Qinhuangdao Coast 期刊论文  OAI收割
JOURNAL OF OCEANOLOGY AND LIMNOLOGY, 2018, 卷号: 36, 期号: 2, 页码: 281-292
作者:  Cao Xihua;  Yu Zhiming;  Wu Zaixing;  Cheng Fangjin;  He Liyan
  |  收藏  |  浏览/下载：51/0  |  提交时间：2019/08/21
Doppler-robust high-spectrum-efficiency VCM-OFDM scheme for low Earth orbit satellites broadband data transmission 期刊论文  OAI收割
IET COMMUNICATIONS, 2018, 卷号: 12, 期号: 1, 页码: 35-43
作者:  Li, Jionghui;  Xiong, Weiming;  Sun, Geng;  Wang, Zhugang;  Huang, Yonghui
  |  收藏  |  浏览/下载：74/0  |  提交时间：2018/03/02