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• OAI收割 [18]

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• 期刊论文 [12]
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• 2020 [1]
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浏览/检索结果: 共18条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 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.   Enzyme activity and microbial biomass availability in artificial soils on rock-cut slopes restored with outside soil spray seeding (OSSS): Influence of topography and season 期刊论文  OAI收割 JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2018, 卷号: 211, 页码: 287-295 作者:  Zhang, Wenjuan;  Li Ruirui;  Ai, Xiaoyan;  Jiao Chen;  Xu, Wennian   |  收藏  |  浏览/下载：32/0  |  提交时间：2018/06/05 Cut-slope  Outside soil spray seeding  Soil enzyme activity  Microbial biomass   Outside-in synthesis of mesoporous silica/molybdenum disulfide nanoparticles for antitumor application 期刊论文  OAI收割 CHEMICAL ENGINEERING JOURNAL, 2018, 卷号: 351, 页码: 157, 168 作者:  Zhao, Jiulong;  Xie, Pei;  Ye, Changqing;  Wu, Chenyao   |  收藏  |  浏览/下载：42/0  |  提交时间：2018/12/28 Outside-in synthesis  Silica  Molybdenum disulfide  Photothermal  Tumor   The texture, structure and nutrient availability of artificial soil on cut slopes restored with OSSS - Influence of restoration time 期刊论文  OAI收割 JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2017, 卷号: 200, 页码: 502-510 作者:  Huang, Zhiyu;  Chen, Jiao;  Ai, Xiaoyan;  Li, Ruirui;  Ai, Yingwei   |  收藏  |  浏览/下载：44/0  |  提交时间：2017/08/18 Cut Slope Restoration  Outside Soil Spray Seeding  Soil Particle Size  Aggregates Stability   Comparison of stem taper models for the four tropical tree species in Mount Makiling, Philippines 期刊论文  OAI收割 Journal of Mountain Science, 2016, 卷号: 13, 期号: 3, 页码: 536-545 作者:  Roscinto Ian C. LUMBRES;  Azyleah C. ABINO;  Nelson M. PAMPOLINA;  Feliciano G. CALORA Jr.;  Young Jin LEE 收藏  |  浏览/下载：27/0  |  提交时间：2016/02/19 Mount Makiling Forest Reserve  Stem volume estimation  Diameter outside bark  Kozak model  Tropical tree species   Evaluation of Some Stem Taper Models for Camellia japonica in Mount Halla, Korea 期刊论文  OAI收割 Journal of Mountain Science, 2015, 卷号: 12, 期号: 6, 页码: 1395-1402 作者:  Sung Cheol JUNG;  Yeon Ok SEO;  Hyun Kyu WON;  Roscinto Ian C. LUMBRES 收藏  |  浏览/下载：32/0  |  提交时间：2015/11/19 Mount Halla  Stem volume  Diameter outside bark  Kozak model  Model evaluation   Stepwise synthesis of cuprous oxide nanopartides with adjustable structures and growth model 期刊论文  OAI收割 SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2014, 卷号: 57, 期号: 11, 页码: 2287-2294 作者:  Yang AiLing;  Wang YuJin;  Li ShunPin;  Bao XiChang;  Yang RenQiang 收藏  |  浏览/下载：17/0  |  提交时间：2015/11/02 cuprous oxide  nano hollow spheres  stepwise synthesis  sodium hydrate  inside-outside growth model   Comparative Analysis of Four Stem Taper Models for Quercus glauca in Mount Halla, Jeju Island, South Korea 期刊论文  OAI收割 Journal of Mountain Science, 2014, 卷号: 11, 期号: 2, 页码: 442-448 LUMBRES Roscinto Ian Canicosa; LEE Young Jin; CHOI Hyung Soon; KIM Sung Yong; JANG Mi Na; ABINO Azyleah Cañizares; SEO Yeon Ok; KIM Chan Soo; PARK Jung Hwan 收藏  |  浏览/下载：44/0  |  提交时间：2014/03/06 Mount Halla  Merchantable stem volume  Diameter outside bark  Kozak model  Model evaluation   β2整合素由外向内的激活路径研究 会议论文  OAI收割 第一届国际暨第十三次中国生物物理学术大会, 中国江西南昌, 2013-10-28 作者:  毛德斌;  吕守芹;  李宁;  章燕;  龙勉 收藏  |  浏览/下载：50/0  |  提交时间：2015/05/14 整合素  双向信号  信号转导  血管内皮细胞  细胞表面受体  炎症反应  介导细胞  外源  outside  外旋转   Dopaminergic modulation of axonal potassium channels and action potential waveform in pyramidal neurons of prefrontal cortex 期刊论文  OAI收割 JOURNAL OF PHYSIOLOGY-LONDON, 2013, 卷号: 591, 期号: 13, 页码: 3233-3251 Yang, J; Ye, MY; Tian, CP; Yang, MP; Wang, YH; Shu, YS 收藏  |  浏览/下载：26/0  |  提交时间：2013/11/06 OUTSIDE-OUT PATCHES  RECEPTOR MODULATION  IN-VITRO  NORADRENERGIC NEURONS  CALCIUM-CHANNELS  CORTICAL-NEURONS  XENOPUS OOCYTES  CEREBRAL-CORTEX  PROTEIN-KINASE  K+ CHANNELS