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| 1 | Effects of river damming on biogenic silica turnover:implications for biogeochemical carbon and nutrient cycles显示文摘Rivers link terrestrial ecosystems and marine ecosystems, and they transport large amounts of substances into oceans each year, including several forms of silicon(Si), carbon(C), and other nutrients. However, river damming affects the water flow and biogeochemical cycles of Si, C, and other nutrients through biogeochemical interacting processes. In this review, we first summarize the current understanding of the effects of river damming on the processes of biogeochemical Si cycle, especially the source, composition, and recycling process of biogenic silica(BSi). Then, we introduce dam impacts on the cycles of C and some other nutrients. Dissolved silicon in rivers is mainly released from phytolith dissolution and silicate weathering. BSi in suspended matter or sediments in most rivers mainly consists of phytoliths and mainly originates from soil erosion. However, diatom growth and deposition in many reservoirs formed by river interception may significantly increase the contribution of diatom Si to total BSi, and thus significantly influence the biogeochemical Si,C, and nutrient cycles. Yet the turnover of phytoliths and diatoms in different rivers formed by river damming is still poorly quantified. Thus, they should be further investigated to enhance our understanding about the effects of river damming on global biogeochemical Si, C and nutrient cycles. | Nan Ma Zhaoliang Song Baoli Wang Fushun Wang Xiaomin Yang Xiaodong Zhang Qian Hao Yuntao Wu | 2017 | Acta Geochimica2017，36，4： | 3 |
| 2 | Ecological stoichiometry of nitrogen, phosphorous, and sulfur in China's forests显示文摘Much attention has been paid to the stoichiometry of carbon(C), nitrogen(N), and phosphorus(P) because of their significance for plant growth and climate change. However, other nutrients, such as sulfur(S), are often ignored. In this study, we analyzed the stoichiometry of N, P, and S in leaves of 348 plant species in China's forests. The results show higher N content and higher molar ratios of N/P and P/S in Angiospermae than in Gymnospermae. At the family level, Ulmaceae absorbed more N and P from soils than other families, and Cupressaceae absorbed more S than other families. In addition,except for bamboo and other tropical forests, leaf N and P content of China's forests generally increased from low to middle latitudes and then slightly decreased or plateaued at high latitudes. Plant ecotypes, taxonomic groups, environmental conditions, atmospheric S precipitation, and soil-available N and P significantly affected the distribution and stoichiometry of leaf N, P, and S in China's forests.Our study indicates that China's forests are likely limited by P and S deficiencies which may increase in the future. | Yuntao Wu Hongyan Liu Zhaoliang Song Xiaomin Yang Zichuan Li Qian Hao Linan Liu | 2017 | Acta Geochimica2017，36，3： | 2 |
| 3 | Spectral and spatial complexitybased hyperspectral unmixing显示文摘 | Jia Sen Qian Yuntao | | 0，，12： | 1 |
| 4 | Hyperspeetral Unmixing via L1/2 Sparsity-Constrained Nonnegative Matrix Factorization 显示文摘 | QIAN Yuntao JIA Sen ZHOU Jun | 2011 | IEEE Trans Geo Remote Se2011，49，11： | 1 |
| 5 | Improved recognition of figures containing fluorescence microscope images in online journal articles using graphical models显示文摘 | Qian Yuntao Murphy RF | 2008 | Bioinformatics2008，24，4： | 1 |
| 6 | Constrained nonnegative matrix factorization for hyperspectral unmixing显示文摘 | Jia Sen Qian Yuntao | | 0，，01： | 1 |
| 7 | Highly selective synthesis of single-walled carbon nanotubes from methane in a coupled Downer-turbulent fluidized-bed reactor显示文摘For the synthesis of single-walled carbon nanotubes (SWCNTs) from CH4 over a Fe/MgO catalyst, we proposed a coupled Downer-turbulent fluidized-bed (TFB) reactor to enhance the selectivity and yield (or production rate) of SWCNTs. By controlling a very short catalyst residence time (1-3s) in the Downer, only part of Fe oxides can be reduced to form Fe nano particles (NPs) available for the growth of SWCNTs. The percentage of unreduced Fe oxides increased and the yield of SWCNTs decreased accordingly with the increase of catalyst feeding rate in Downer. SWCNTs were preferentially grown on the catalyst surface and inhibited the sintering of the Fe crystallites which would be formed thereafter in the downstream TFB, evidenced by TEM, Raman and TGA. The coupled Downer-turbulent fluidized-bed reactor technology allowed higher selectivity and higher production rate of SWCNTs as compared to TFB alone. | Song Yun Weizhong Qian Chaojie Cui Yuntao Yu Chao Zheng Yi Liu Qiang Zhang Fei Wei | 2013 | Journal of Energy Chemistry2013，22，4： | 1 |
| 8 | Effects of topography and vegetation on distribution of rare earth elements in calcareous soils显示文摘This study investigated the impact of topography and vegetation on distribution of rare earth elements(REEs)in calcareous soils using methods of single extraction and mass balance calculation. The purposes of the study were to set a basis for further research on the biogeochemical REE cycle and to provide references for soil–water conservation and REE-containing fertilizer amendments. The results show a generally flat Post-Archean Average Australian Shale—normalized REE pattern for the studied calcareous soils. REE enrichment varied widely. The proportion of acidsoluble phases of heavy REEs was higher than that of light REEs. From top to bottom of the studied hills, dominant REE sources transitioned from limestone in-situ weathering to input from REE-containing phases(e.g., clay minerals,amorphous iron, REE-containing fluids). Our results indicate that the REE content of calcareous soils is mainly controlled by slope aspect, while the enrichment degree of REEs is related to geomorphological position and vegetation type.Furthermore, the proportion of acid-soluble phases of REEs is mainly controlled by geomorphological position. | Zhaoliang Song Yuntao Wu Xiaomin Yang Zijuan Xu Linan Liu Xiaodong Zhang Qian Hao Shaobo Sun Guilin Han Congqiang Liu | 2017 | Acta Geochimica2017，36，3： | 1 |
| 9 | Ionic liquid coated single-walled carbon nanotube buckypaper as supercapacitor electrode显示文摘Effect of stacking structure of single-walled carbon nanotubes(SWCNTs) on its performance as electrode of supercapacitor was investigated in the present work.Considering SWCNTs easily formed bundles due to strong van de Waals attraction between tubes,we proposed first dispersion of SWCNTs by ionic liquids(ILs) of 1-ethyl-3-methyl imidazolium tetrafluoroborate(EMIMBF_4),followed by fabrication of buckypaper by compression.The debundling effect of ILs on SWCNTs increased the interface between electrode and electrolyte,decreased electrical resistance,and,consequently,increased performance of the supercapacitor.Since ILs,used to disperse SWCNTs,also functioned as electrolyte in supercapacitor,our method is a simple way to prepare buckypaper electrode with high performance. | Chao Zheng Weizhong Qian Yuntao Yu Fei Wei | 2013 | Particuology2013，11，4： | 1 |
| 10 | Constrained Nonnegative Ma-trix Factorization for Hyperspectral Unmixing 显示文摘 | Jia Sen Qian Yuntao | 2009 | IEEE Transactions on Geoscience and Remote Sens-ing2009，47，1： | 1 |
| 11 | MRF-ICA mixture models for unmixing of hyperspectral images显示文摘 | Jia Shen Qian Yuntao | 2007 | International Journal of Wavelets Multiresolution and Information2007，5，1： | 1 |
| 12 | Constrained nonnegative matrix factorization for hyperspectral unmixing显示文摘 | JIA Sen QIAN Yuntao | 2009 | IEEE Transactions Geoscience Remote Sensing2009，47，1： | 1 |
| 13 | Automatic License Extraction from Moving Vehicles显示文摘 | Yuntao cui Qian Huang | 1997 | IEEE International Conference on Image Processing1997，，3： | 1 |
| 14 | Hyperspectral imagery restora- tion using nonloeal spectral-spatial structured sparse repre- sentation with noise estimation 显示文摘 | Qian Yuntao Ye Minchao | 2013 | IEEE Journal of Select-ed Topics in Applied Earth Observations and Remote Sens- ing2013，6，2： | 1 |
| 15 | Automatic License Extraction from Moving Vehicles显示文摘 | Yuntao Cui Qian Huang | | 0，，03： | 1 |
| 16 | Automatic license extraction from moving vehicles显示文摘 | Yuntao Cui Qian Huang | 1997 | IEEE Transaction on Pattern Analysis and Machine Intelligence1997，7，4： | 1 |
| 17 | A GIS-Based Evaluation of Environmental Sensitivity for an Urban Expressway in Shenzhen, China显示文摘 | Qian Li Fengqing Guo Yuntao Guan | 2018 | Engineering2018，4，2： | 1 |
| 18 | Text categorization based on regularization extreme learning machine显示文摘 | Wenbin Zheng Yuntao Qian Hujuan Lu | 2012 | Neural Computing &: Applications2012，，： | 1 |
| 19 | Automatic License Extraction from Moving Vehicles显示文摘 | Yuntao Cui Qian Huang | 1997 | Image Processing1997，，3： | 1 |
| 20 | AN IMAGE SEGMENTATION APPROACH BASED ON FUZZY-NEURAL-NETWORK HYBRID SYSTEM显示文摘This paper presents a new solution to the image segmentation problem, which is based on fuzzy-neural-network hybrid system (FNNHS). This approach can use the experiential knowledge and the ability of neural networks which learn knowledge from the examples, to obtain the well performed fuzzy rules. Furthermore this fuzzy inference system is completed by neural network structure which can work in parallel. The segmentation process consists of pre-segmentation based on region growing algorithm and region merging based on FNNHS. The experimental results on the complicated image manifest the utility of this method. | Qian Yuntao Xie Weixin(Dept. of Computer Sci. & Eng., Northwestern Polytechnical University, Xi’an 710072) (Dept. of Electronic Eng., Xidian University, Xi’an 710071) | 1997 | Journal of Electronics(China)1997，14，4： | 0 |
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