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| 1 | Analyzing and modeling the coverage of vegetation in the Qaidam Basin of China: The role of spatial autocorrelation显示文摘在植被和环境因素之间的关系总是是在生态学的一个主要话题,但是揭示植被也是一个重要方法对的动态反应和气候上的效果改变的反馈。为特殊地理地点和 Qaidam 盆的气候的特征,与支持传统并且遥感数据,在这份报纸,一个植被范围模型被建立。由五个环境因素的植被范围的量的预言开始通过多重逐步的回归(MSR ) 被认识到模型。然而,在这五个环境因素之中有重要 multicollinearity,它减少 MSR 模型的表演。然后通过 Moran 的介绍索引,反映植被分发,仅仅平均年度降雨的二个变量和本地 Moran 索引的空间自相关的指示物在植被范围模型的最后的建立被使用。结果证明在植被的分发有重要空间自相关。在植被范围模型的建立的空间自相关的角色让改进不仅从 0.608 ~ 0.656 的模型试穿 R2,而且在独立人士之中移开 multicollinearity。 | ZHU Wenbin JIA Shaofeng LU Aifeng YAN Tingting | 2012 | Journal of Geographical Sciences2012，22，2： | 8 |
| 2 | A novel procedure for pollen-based quantitative paleoclimate reconstructions and its application in China显示文摘Traditionally, the evaluation of pollen-based quantitative paleoclimate reconstructions focuses on the ability of calibration sets to infer present climatic conditions and/or the similarity between fossil and modern assemblages. Objective criteria for choosing the most appropriate climate parameter(s) to be reconstructed at a specific site are thus lacking. Using a novel approach for testing the statistical significance of a quantitative reconstruction using random environmental data, in combination with the advantageous large environmental gradients, abundant vegetation types and comprehensive modern pollen databases in China, we describe a new procedure for pollen-based quantitative paleoclimatic reconstructions. First, the most significant environmental variable controlling the fossil pollen assemblage changes is identified. Second, a calibration set to infer changes in this targeted variable is built up, by limiting the modern ranges of other environmental variables. Finally, the pollen-based quantitative reconstruction is obtained and its statistical significance assessed. This novel procedure was used to reconstruct the mean annual precipitation(Pann) from Gonghai Lake in the Lvliang Mountains, and Tianchi Lake in the Liupan Mountains, on the eastern and western fringe of the Chinese Loess Plateau, respectively. Both Pann reconstructions are statistically significant(p<0.001), and a sound and stable correlation relationship exists in their common period, showing a rapid precipitation decrease since 3300 cal yr BP. Thus, we propose that this procedure has great potential for reducing the uncertainties associated with pollen-based quantitative paleoclimatic reconstructions in China. | CHEN JianHui LV FeiYa HUANG XiaoZhong H.John B.BIRKS Richard J.TELFORD ZHANG ShengRui XU QingHai ZHAO Yan WANG HaiPeng ZHOU AiFeng HUANG Wei LIU JianBao WEI GuoYing | 2017 | Science China Earth Sciences2017，60，11： | 6 |
| 3 | Swells of the East China Sea显示文摘Over the past few decades,an increasing number of marine activities have been conducted in the East China Sea,including the construction of various marine structures and the passage of large ships.Marine safety issues are paramount and are becoming more important with respect to the likely increase in size of ocean waves in relation to global climate change and associated typhoons.In addition,swells also can be very dangerous because they induce the resonance of floating structures,including ships.This study focuses on an investigation of swells in the East China Sea and uses hindcast data for waves over the past 5 years in a numerical model,WAVEWATCH III(WW3),together with historical climate data.The numerical calculation domain covers the entire North West Pacific.Next,swells are separated and analyzed using simulated wave fields,and both the characteristics and generation mechanisms of swells are investigated. | TAO Aifeng YAN Jin PEI Ye ZHENG Jinhai MORI Nobuhito | 2017 | Journal of Ocean University of China2017，16，4： | 3 |
| 4 | Ni-Ag-O as catalyst for a novel one-step reaction to convert ethane to ethylene oxide显示文摘 | Ying Wu Aifeng Yan Yiming He Binfu Wu Tinghua Wu | 2010 | Catalysis Today2010，，3： | 1 |
| 5 | A facile synthetic route to flower-like NiO and its catalytic properties显示文摘 | Zhou Dishan Yan Aifeng Wu Ying | 2013 | Indian Joumal of Chemis- try2013，52，1： | 1 |
| 6 | Human papillomavirus type 16 and 18 infection is associated with lungcancer patients from the central part of China显示文摘 | Yongping Wang Aifeng Wang Rui Jiang Huaxiong Pan Bangxing Huang Yan Lu Cuihuan Wu | 2008 | Oncology Reports2008，，2： | 1 |
| 7 | Establishment and Optimization of HPLC-MS/MS for Detection of Progesterone Residue in Raw Milk显示文摘In order to establish an HPLC-MS/MS method for detecting progesterone in raw milk,raw milk was extracted with methanol,and then determined by HPLC-MS/MS after the purification with a C18 solid phase extraction column. Qualitative determination was performed according to retention time and selective ion abundance ratio,and quantification was performed by external standard method. The results showed that progesterone had a good linear relation in the range of0. 1-5. 0 ng/ml,with a correlation coefficient of 0. 999 9. The detection limit of the established method was 0. 02 μg/kg,and the quantification limit was0. 04 μg/kg. In the standard addition range of 0. 1-5. 0 ng/ml,the recovery ranged from 79. 6% to 105. 1%,with relative standard deviation≤8. 9%. Compared with the industry standard,the detection limit and the quantification limit of the established method are significantly reduced,and the sensitivity of the method is enhanced,so this method is suitable for the detection of progesterone residue in fresh milk in pastures. | Zhen ZHANG Jun ZHANG Lei YAN Yuxi ZHAO Aifeng ZHANG Yuefei YAN | 2019 | Agricultural Biotechnology2019，8，1： | 1 |
| 8 | Water Security Situation in Haihe River Basin after South-to-North Water Transfer Project显示文摘The over-exploitation of water resources in the Haihe River Basin (HRB) has now become a serious problem. This is clearly evidenced by the fact that many local rivers and lakes are drying up and the total amount of over-exploited groundwater has reached over 1000×108m3. It is important to note that the exploitation of water resources in HRB was reasonable before 1979. After 1980, however, over-exploitation happened with an annual average amount of 40×108m3. Both the dry season and rapid economic growth in HRB took place at the same time. Therefore, the over-exploitation of water in HRB was actually the negative result of the conjunction of a continuous dry season and rapid economic growth. So the over-exploitation would not be as serious as it is today if either of the above two stopped. After the first stage of south-to-north water transfer project, the water shortage problem in HRB could be eased for the following reasons: fi rstly, water transfer project will bring to the Basin 60×108m3 water resources; secondly, a wet season will come back eventually according to natural law of climate variability; finally, its agricultural and industrial use and total water consumption all have decreased from the peak value, so that the groundwater table will raise certainly and ecological water in rivers and lakes that were dried-up will be partly restored. In the future, the main problem of water resources security in HRB will include water pollution, operation risk of the south-to-north water transfer project, groundwater pollution and engineering geological hazards that may be brought by groundwater rise. The proposed countermeasures are as follows: keeping strengthening water demand management, raising water price as well as subsidies for the low-income family and improving other water related policies, preventing and dealing with water pollution seriously and getting fully prepared for the operation of south-to-north water transfer project. | JIA Shaofeng YAN Tingting LÜ Aifeng | 2012 | Bulletin of the Chinese Academy of Sciences2012，26，1： | 0 |
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