中国科学院机构知识库网格系统: 检索

A new method for estimating Sharpe ratio function via local maximum likelihood 期刊论文 OAI收割
JOURNAL OF APPLIED STATISTICS, 2022, 页码: 19
作者: Xu, Wenchao; Lin, Hongmei; Tong, Tiejun; Zhang, Riquan

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收藏 | 浏览/下载：25/0 | 提交时间：2023/02/07

Direct method heteroscedastic non-parametric regression joint limiting distribution local polynomial smoothing Sharpe ratio function

Assessing the collapse risk of Stipa bungeana grassland in China based on its distribution changes 期刊论文 OAI收割
JOURNAL OF ARID LAND, 2020, 页码: 15
作者: Qiao, Xianguo; Guo, Ke; Li, Guoqing; Zhao, Liqing; Li, Frank Yonghong

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收藏 | 浏览/下载：20/0 | 提交时间：2020/05/19

climate change limiting factors maximum entropy algorithm potential distribution realizable distribution

Assessing the collapse risk of Stipa bungeana grassland in China based on its distribution changes 期刊论文 OAI收割
JOURNAL OF ARID LAND, 2020, 卷号: 12, 期号: 2, 页码: 303-317
作者: Qiao, Xianguo; Guo, Ke; Li, Guoqing; Zhao, Liqing; Li, Frank Yonghong

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收藏 | 浏览/下载：16/0 | 提交时间：2022/03/01

climate change limiting factors maximum entropy algorithm potential distribution realizable distribution

An Experimental Method to Measure Flow Distribution in the Cathode of High-Temperature Polymer Electrolyte Membrane Fuel Cells Stack 期刊论文 OAI收割
ENERGY TECHNOLOGY, 2019, 页码: 6
作者: Ji, Feng; Yang, Linlin; Li, Yinhua; Sun, Hai; Sun, Gongquan

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收藏 | 浏览/下载：67/0 | 提交时间：2019/12/02

flow distribution flow measurement high-temperature polymer electrolyte membrane fuel cells hydrogen limiting current stacks

烟台夹河口外柱状沉积物还原性无机硫、活性铁的变化特征及其相互关系 期刊论文 OAI收割
海洋科学, 2018, 卷号: 42, 期号: 8, 页码: 90-97
作者: 姜明; 赵国强; 李兆冉; 盛彦清

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收藏 | 浏览/下载：25/0 | 提交时间：2020/07/08

还原性无机硫活性铁深层柱状沉积物硫化度矿化度 Reduced inorganic sulfur Reactive iron Deep core sediments Degree of pyritization Degree of sulfidity The distribution characteristics and coupling mechanism of reduced inorganic sulfur (RIS)and reactive iron in marine core sediments are closely related to the evolution of environment quality.In this study,an improved cold diffusion method and hydrochloric acid extraction method were applied to the acid-volatile sulfur (AVS),pyrite sulfur (CRS),elemental sulfur (ES),and reactive iron [Fe (Ⅱ)and Fe (III)] analyses.The distribution characteristics and coupling mechanism of S and Fe were investigated based on a core sediment 4 meters deep collected in the northern sea area of the mouth of Jiahe River,Yantai.The results showed that the RIS in sediments was dominated by CRS,followed by AVS and ES.The content of AVS presented a narrow range with depth,whereas the CRS and ES were higher at the top and bottom layers than the middle layer reactive iron was dominated by Fe (II),which increased with depth,while Fe (Ⅲ)gradually decreased with depth.Most of the Fe (III)was reduced to the disssolved Fe(II),which was combined with the soluble H_2S of the sulfate-reducing bacteria to produce CRS and ES in the deep layer,resulting in their accumulation at the bottom of core sediments.Furthermore,this study showed that reactive iron was not a limiting factor for the accumulation of RIS with lower degree of pyritization and degree of sulfidity.

The altitudinal distribution center of a widespread cushion species is related to an optimum combination of temperature and precipitation in the central Tibetan Plateau SCI/SSCI论文 OAI收割
2013
作者: Li R.

收藏 | 浏览/下载：21/0 | 提交时间：2014/12/24

Alpine meadow Climate Cushion plant Distribution pattern Limiting factor Plant cover Survival androsace-tapete primulaceae spatial genetic-structure net primary productivity central chile high andes ecosystem engineers alpine gradients plant elevation responses

The application of spectral distribution of product of two random matrices in the factor analysis 期刊论文 OAI收割
SCIENCE IN CHINA SERIES A-MATHEMATICS, 2007, 卷号: 50, 期号: 9, 页码: 1303-1315
作者: Jin, Bai-suo; Miao, Bai-qi; Ye, Wu-ye; Wu, Zhen-xiang

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收藏 | 浏览/下载：15/0 | 提交时间：2018/07/30

limiting spectral distribution product of random matrices large dimensional random matrices factor number time series

Models for extremes using the extended three-parameter Burr XII system with application to flood frequency analysis 期刊论文 OAI收割
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES, 2004, 卷号: 49, 期号: 4, 页码: 685-702
Shao, QX; Wong, H; Xia, J(夏军); Ip, WC

收藏 | 浏览/下载：402/83 | 提交时间：2011/06/10

extended Burr XII distribution flood frequency analysis generalized Pareto distribution limiting distribution log-logistic distribution Pareto distribution Weibull distribution

Models for extremes using the extended three-parameter Burr XII system with application to flood frequency analysis SCI/SSCI论文 OAI收割
2004
作者: Xia J.

收藏 | 浏览/下载：18/0 | 提交时间：2012/06/08

extended Burr XII distribution flood frequency analysis generalized Pareto distribution limiting distribution log-logistic distribution Pareto distribution Weibull distribution generalized pareto distribution maximum-likelihood-estimation parameter-estimation order-statistics distributions transformation quantile

Study of yields for target fragments from the reaction of iron with 80MeV/u(16)O ions 期刊论文 OAI收割
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 1999, 卷号: 23, 页码: 523-528
作者: Li, WX; Zhao, LL; Zhi, Q; Sun, TY; Ambe, S

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收藏 | 浏览/下载：14/0 | 提交时间：2018/05/31

nuclear reaction intermediate energy charge distribution mass yield distribution limiting fragmentation