中国科学院机构知识库网格系统: 检索

Mapping and assessing drought losses in China: A process-based framework analysis 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION, 2024, 卷号: 111, 页码: 104739
作者: Wang, Tingting; Sun, Fubao

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收藏 | 浏览/下载：11/0 | 提交时间：2024/09/19

Drought loss function Direct economic loss Drought severity GDP Climate change

Allocating assistance after a catastrophe based on the dynamic assessment of indirect economic losses 期刊论文 OAI收割
NATURAL HAZARDS, 2019, 卷号: 99, 期号: 1, 页码: 17-37
作者: Zhang, Zhengtao; Li, Ning; Xu, Hong; Feng, Jieling; Chen, Xi

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收藏 | 浏览/下载：41/0 | 提交时间：2020/05/19

Natural disaster Indirect economic loss Direct economic loss Input-output model Earthquake Risk management

Allocating assistance after a catastrophe based on the dynamic assessment of indirect economic losses 期刊论文 OAI收割
NATURAL HAZARDS, 2019, 卷号: 99, 期号: 1, 页码: 17-37
作者: Zhang, Zhengtao; Li, Ning; Xu, Hong; Feng, Jieling; Chen, Xi

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收藏 | 浏览/下载：15/0 | 提交时间：2020/05/19

Natural disaster Indirect economic loss Direct economic loss Input-output model Earthquake Risk management

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

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收藏 | 浏览/下载：76/0 | 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.

Reversible and irreversible loss in performance in direct methanol fuel cells during freeze/thaw cycles 期刊论文 OAI收割
journal of power sources, 2012, 卷号: 219, 页码: 193-198
作者: Yang, Linlin; Sun, Hai; Wang, Suli; Jiang, Luhua; Sun, Gongquan

收藏 | 浏览/下载：27/0 | 提交时间：2015/11/12

Direct methanol fuel cell Freeze/thaw cycling Reversible/irreversible performance loss Reverse current

Fabrication of high-efficiency ultraviolet blazed gratings by use of direct Ar2-CHF3 ion-beam etching through a rectangular photoresist mask (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
Tan X.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In ultraviolet spectroscopy groove irregularity and surface roughness of nanometer magnitude can cause a significant loss of diffraction efficiency. Therefore there is a constant need to improve the diffraction efficiency. A blazed grating can concentrate most of the light intensity into a desired diffraction order it is important to control the groove shape precisely so it is the optimum choice among gratings of different kinds of profile. As the operating wavelength of most UV spectral applications is less than 200 nm especially the blaze angle and the apical angle. We have presented a direct shaping method to fabricate EUV blazed gratings by using an ion-beam mixture of Ar+ and CHF2 +to etch K9 glass with a rectangular photoresist mask. With this method the required blaze angle is small we have succeeded in fabricating well-shaped UV blazed gratings with a 1200 line/mm groove density and 8.54 blaze angles and 1200 line/mm groove density and 11.68 blaze angles and the metrical efficiency is about 81% and 78%. The good performance of the gratings was verified by diffraction efficiency measurements. When one uses the etching model the conditions on the ion-beam grazing incident angle and the CHF3partial pressure should be noted. Besides since the etched groove shape depends on the aspect ratio of the photoresist mask ridge if we wish to fabricate larger gratings with this method we must improve the uniformity of the photoresist mask before ion-beam etching. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Evaluation of fertilizing schemes for direct-seeding rice fields in Taihu Lake Basin, China 期刊论文 iSwitch采集
TURKISH JOURNAL OF AGRICULTURE AND FORESTRY, 2010, 卷号: 34, 期号: 1, 页码: 83-90
作者: Li, Yong; Yang, Lin Zhang; Wang, Chao

收藏 | 浏览/下载：28/0 | 提交时间：2019/10/10

Rice direct-seeding fertilizing scheme nitrogen loss

Pre-assessment on the loss and impact caused by large-scale flood disasters SCI/SSCI论文 OAI收割
2006
作者: Ma X.

收藏 | 浏览/下载：19/0 | 提交时间：2012/06/08

large-scale flood disasters social impact direct loss indirect loss pre-assessment

Pre-assessment on the loss and impact caused by large-scale flood disasters 期刊论文 OAI收割
CHINESE SCIENCE BULLETIN, 2006, 卷号: 51, 期号: Suppl. S, 页码: 186-196
作者: Dai Erfu; Wu ShaoHong(吴绍洪)

收藏 | 浏览/下载：19/0 | 提交时间：2011/06/10

large-scale flood disasters social impact direct loss indirect loss pre-assessment

A beam-maser instability: Direct amplification of radiation 期刊论文 OAI收割
Physics of Plasmas, 2002, 卷号: 9, 期号: 6, 页码: 2816-2821
Chen, Y. P.; 周国成; Yoon, P. H.; Wu, C. S.

收藏 | 浏览/下载：30/0 | 提交时间：2014/04/30

electron-cyclotron maser auroral kilometric radiation loss-cone distribution weakly relativistic electrons quasi-linear diffusion synchrotron instability direct generation radio emissions solar corona frequency