中国科学院机构知识库网格系统: 检索

Seed bank dynamics and quality in the seagrass Halophila ovalis along estuarine salinity gradients-a case in the Swan-Canning Estuary 期刊论文 OAI收割
FRONTIERS IN MARINE SCIENCE, 2022, 卷号: 9, 页码: 13
作者: Gu, Ruiting; Statton, John; Rahmawati, Susi; Hovey, Renae; Zhou, Yi

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收藏 | 浏览/下载：31/0 | 提交时间：2023/01/04

seed viability salinity seasonal variation seed spatial dispersion X-ray

Extending the stability limit of explicit scheme with spatial filtering for solving wave equations 期刊论文 OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 卷号: 397, 页码: 9
作者: Gao, Yingjie; Zhang, Jinhai; Yao, Zhenxing

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收藏 | 浏览/下载：147/0 | 提交时间：2019/11/14

Explicit scheme Spatial filtering CFL stability limit Time-dispersion error Large time step

Spatial, Temporal and Genetic Dynamics Characteristics of Influenza B Viruses in China, 1973-2018 期刊论文 OAI收割
VIROLOGICA SINICA, 2019, 页码: 7
作者: Li, Xiaowen; Chan, Karen Kie Yan; Xu, Bo; Lu, Ming; Xu, Bing

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收藏 | 浏览/下载：27/0 | 提交时间：2020/05/19

Influenza B viruses Effective population size Phylogeographic Spatial dispersion Mainland China

Quantifying Nanoparticle Mixing State to Account for Both Location and Size Effects 期刊论文 OAI收割
TECHNOMETRICS, 2017, 卷号: 59, 期号: 3, 页码: 391-403
作者: Dong, Ling; Li, Xiaodong; Yu, Dan; Zhang, Hui; Zhang, Zhong

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收藏 | 浏览/下载：14/0 | 提交时间：2018/07/30

Dispersion and distribution Nano images Permutation test Ripley's K function Spatial point pattern

Application of SPAC method to estimate the crustal S-wave velocity structure 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2013, 卷号: 56, 期号: 11, 页码: 3846-3854
作者: Xu Pei-Fen; Li Shi-Hao; Ling Su-Qun; Guo Hui-Li; Tian Bao-Qing

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收藏 | 浏览/下载：36/0 | 提交时间：2018/09/26

S-wave velocity structure Spatial autocorrelation method Dispersion curve Microtremor signal Capital area

Application of SPAC method to estimate the crustal S-wave velocity structure 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2013, 卷号: 56, 期号: 11, 页码: 3846-3854
作者: Xu Pei-Fen; Li Shi-Hao; Ling Su-Qun; Guo Hui-Li; Tian Bao-Qing

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收藏 | 浏览/下载：37/0 | 提交时间：2018/09/26

S-wave velocity structure Spatial autocorrelation method Dispersion curve Microtremor signal Capital area

Application of SPAC method to estimate the crustal S-wave velocity structure 期刊论文 OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2013, 卷号: 56, 期号: 11, 页码: 3846-3854
作者: Xu Pei-Fen; Li Shi-Hao; Ling Su-Qun; Guo Hui-Li; Tian Bao-Qing

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收藏 | 浏览/下载：12/0 | 提交时间：2018/09/26

S-wave velocity structure Spatial autocorrelation method Dispersion curve Microtremor signal Capital area

Advanced astigmatism-corrected tandem Wadsworth mounting for small-scale spectral broadband imaging spectrometer (EI CONFERENCE) 会议论文 OAI收割
作者: Lin G.-Y.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution high spectral resolution and high optical transmission efficiency. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large-scale imaging spectrometer. When it is used to connect the off-axis telescope such as off-axis parabolic mirror it presents lower imaging quality than to connect the coaxial telescope. It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small-scale spectrometer in a close volume by satellite. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. Then the optimum arrangement for the first plane grating and the second concave grating which make the anterior Wadsworth condition fulfilling each wavelength is analyzed by the geometric and first order differential calculation. These two arrangements comprise the advanced Wadsworth mounting condition. The spectral resolution has also been calculated by these conditions. An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. 2012 Optical Society of America.

Contaminant transport in soil with depth-dependent reaction coefficients and time-dependent boundary conditions SCI/SSCI论文 OAI收割
2013
作者: Ma Y.; Ma Y.; Ma Y.

收藏 | 浏览/下载：25/0 | 提交时间：2014/12/24

Contaminant transport Depth-dependent reaction Time-dependent source boundary Model application solute transport numerical inversion laplace transforms porous-media heterogeneous aquifers spatial variability stochastic-analysis sorption dispersion metolachlor

Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Zhang Z.-D.

收藏 | 浏览/下载：49/0 | 提交时间：2013/03/25

Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications on the other which should be calculated calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors without considering the effect of the background radiation. By improving of the traditional method including atmospheric attenuation a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end the dispersion of the image and the effect of image dispersion are not considered in the traditional method an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).