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| 1 | Research on the slope spectrum of the Loess Plateau显示文摘A new concept dealing with digital analysis of loess terrain,slope spectrum,is presented and discussed in this paper,by introducing its characteristic,represen-tation and extracting method from DEMs. Using 48 geomorphological units in dif-ferent parts of the loess as test areas and 5 m-resolution DEMs as original test data,the quantitative depiction and spatial distribution of slope spectrum in China's Loess Plateau have been studied on the basis of a series of carefully-designed experiments. In addition,initial experiment indicates a strong relationship between the slope spectrum and the loess landform types,displaying a potential importance of the slope spectrum in geomorphological studies. Based on the slope spectrums derived from the 25 m-resolution DEM data in whole loess terrain in northern part of Shaanxi,13 slope spectrum indices were extracted and integrated into a compre-hensive layer with image integration method. Based on that,a series of unsuper-vised classifications was applied in order to make a landform classification in northern Shaanxi Loess Plateau. Experimental results show that the slope spec-trum analysis is an effective method in revealing the macro landform features. A continuous change of slope spectrum from south to north in northern Shaanxi Loess Plateau shows an obvious spatial distribution of different loess landforms. This also proves the great significance of the slope spectrum method in describing the terrain roughness and landform evolution as well as a further understanding on landform genesis and spatial distribution rule of different landforms in the Loess Plateau. | TANG GuoAn,LI FaYuan,LIU XueJun,LONG Yi & YANG Xin Key Laboratory of Virtual Geographic Environment,Nanjing Normal University,Ministry of Education,Nanjing 210046,China | 2008 | Science China(Technological Sciences)2008，51，S1： | 22 |
| 2 | Slope spectrum critical area and its spatial variation in the Loess Plateau of China显示文摘斜坡光谱被证明了是在在中国黄土地面的学习揭示 geomorphological 特征的重要方法论。在导出斜坡系列的批评区域的决心是一项不可缺少的任务。与学习区域的尺寸的增加一起,导出的系列越来越同样地正在变得,以便他们的差别能被忽略赞成一个标准。随后,测试尺寸被定义为斜坡光谱批评区域(SSCA ) 。SSCA 是斜坡光谱计算的基础不仅而且到某程度,黄土地势的 geomorphological 开发的思考。高分辨率 DEM 在提取斜坡光谱是重要的。有在北 Shaanxi 省的黄土高原的不同地形区域的一套 48 DEM 为实验被选择。SSCA 的空间分发与一个 geo 统计的分析方法被调查,导致从 6.18 km 2到 35.1 km 2 的价值。主要试验性的结果证明 SSCA 的空间分发与土壤侵蚀紧张的空间分发被相关,到反映地面复杂性的某个程度。斜坡光谱的批评区域从北方介绍 weak-strong-weak 的一个空间变化趋势给南方。四个地面参数,溪谷密度,斜坡偏斜度,地面驱动力(T d ) 和斜坡(求救) 的斜坡,被选择为指示物。在那里存在在 SSCA 和溪谷密度之间的一种好指数的功能关系,地面驱动力(T d ) 和在 SSCA 和斜坡偏斜度之间的一种对数函数关系。斜坡偏斜度增加,和溪谷密度,地面驱动力和求救与增加 SSCA 减少。SSCA 能作为一个区别因素被利用识别黄土地形,因为 SSCA 和黄土地形的进化的空间分布是关联词。从台地跟随黄土地形的进化到溪谷多山的区域,这也证明 SSCA 能代表本地地形的发展度。黄土高原的批评稳定的区域代表黄土地形的开发的度。它的主要意义是稳定的区域的感觉能被用来决定最小的地理单位。 | TANG Guoan SONG Xiaodong LI Fayuan ZHANG Yong XION-GLiyang | 2015 | Journal of Geographical Sciences2015，25，12： | 16 |
| 3 | Geomorphological inheritance for loess landform evolution in a severe soil erosion region of Loess Plateau of China based on digital elevation models显示文摘The influence of pre-quaternary underlying terrain on the formation of loess landforms, i.e., the geomorphological inheritance issue, is a focus in studies of loess landforms. On the basis of multi-source information, we used GIS spatial analysis methods to construct a simulated digital elevation model of a pre-quaternary paleotopographic surface in a severe soil erosion area of the Loess Plateau. To reveal the spatial relationship between underlying paleotopography and modern terrain, an XY scatter diagram, hypsometric curve, gradient and concavity of terrain profiles are used in the experiments. The experiments show that the altitude, gradient and concavity results have significant linear positive correlation between both terrains, which shows a relatively strong landform inheritance relationship, particularly in the intact and complete loess deposit areas. Despite the current surface appearing somewhat changed from the original shape of the underlying terrain under different erosion forces, we reveal that the modern terrain generally smoothes the topographic relief of underlying terrain in the loess deposition process. Our results deepen understanding of the characteristics of geomorphological inheritance in the formation and evolution of loess landforms. | XIONG LiYang TANG GuoAn YUAN BaoYin LU ZhongChen LI FaYuan ZHANG Lei | 2014 | Science China Earth Sciences2014，57，8： | 16 |
| 4 | Performance of biotrickling filters packed with structured or cubic polyurethane sponges for VOC removal显示文摘Two identical bench-scale biotrickling filters (BTFs),BTF 1 and BTF 2,were evaluated for toluene removal at various gas empty bed contact times (EBCTs) and organic loadings.BTF 1 and BTF 2 were packed with structured and cubic synthetic polyurethane sponges,respectively.At a constant toluene loading of 16 g/(m 3 ·hr),toluene removal efficiencies decreased from 98.8% to 64.3% for BTF 1 and from 98.4% to 74.1% for BTF 2 as gas EBCT decreased from 30 to 5 sec.When the toluene loading increased from 35 to 140 g/(m 3 ·hr) at a gas EBCT of 30 sec,the removal efficiencies decreased from 99.1% to 77.4% for BTF 1 and from 99.0% to 81.5% for BTF 2.The pressure drop for both BTFs increased with increased air flow rate,and did not significantly vary while the toluene loading was increased under similar operation conditions.BTF 1 and BTF 2 could start up successfully within 19 and 27 days,respectively,when packed with fresh sponge media,and the performances could be restored in 3-7 days after biomass was removed and wasted from the media.BTF 2 displayed higher removal efficiency even under shorter EBCT or higher loading rate than BTF1 when other operation conditions were similar,while it showed lower pressure drop than BTF 1 during the whole period of operation.These results demonstrated that both BTFs could treat waste gas containing toluene effectively. | Chunping Yang Guanlong Yu Guangming Zeng Haining Yang Fayuan Chen Congying Jin | 2011 | Journal of Environmental Sciences2011，23，8： | 10 |
| 5 | Slope spectrum variation in a simulated loess watershed显示文摘在黄土材料和消除适当地代表真黄土表面的地方,一个模仿的黄土分水岭被采用与黄土分水岭进化在斜坡光谱调查变化。模仿的黄土分水岭的进化被人工的降雨的 exogenetic 力量驾驶。为三个月的一个时期,有不同紧张和持续时间的二十个人工的降雨事件被执行。在这个过程,九个 DEM 数据设定,有 10 公里格子分辨率的各个,被靠近范围的摄影测量学的方法建立。斜坡系列然后从这些 DEM 被提取。小心地设计的量的分析的随后的系列显示了在斜坡光谱和模仿的黄土分水岭的进化之间的一种强壮的关系。斜坡光谱的量的索引变化了定期跟随模仿的黄土分水岭的进化。吝啬的斜坡,斜坡光谱信息熵(H),地面驱动力( T d ),平均数补丁区域( AREA_MN ),传染索引( CONTAG ),和补丁结合索引(结合)不停地增加跟随模仿的分水岭的进化,当时偏斜度(S),周界区域分数维的尺寸( PAFRAC ),和散布和并排索引( IJI )代表了一个相反的趋势。所有这些索引在早、活跃的发展时期活跃地变化了,但是慢慢地在稳定的发展时期。这些试验性的结果显示斜坡系列的时间系列能有效地描绘模仿的黄土分水岭的斜坡分发,因此为为黄土地形建模介绍一个潜在的方法。 | Fayuan LI Guoan TANG Chun WANG Lingzhou CUI Rui ZHU | 2016 | Frontiers of Earth Science2016，10，2： | 9 |
| 6 | Foliar stoichiometry under different mycorrhizal types in relation to temperature and precipitation in grassland显示文摘Aims mycorrhizas play key roles in important ecosystem processes and functions.Carbon(C),nitrogen(N)and phosphorus(P)concentrations and their ratios are very important foliar traits and their cycling constrains most ecosystem processes.thus,this study addresses the influence of mycorrhizal strategies on these foliar nutrients and their response to climate change.Methods a new database was established including mycorrhizal types and leaf C_(mass),N_(mass),P_(mass),C:N and N:P of each plant species based on He et al.[(2008)leaf nitrogen:Phosphorus stoichiometry across Chinese grassland biomes.oecologia 155:301-10].the predomi-nant type of mycorrhizal association of each plant species was classified according to the published literature and our own obser-vations.We analyzed leaf C_(mass),N_(mass),P_(mass),C:N and N:P among 112 plant species in 316 samples of ascertained mycorrhizal type in the major grassland biomes of China.Important Findingsthe results show highly significant variation among different myc-orrhizal strategy types for foliar C_(mass),N_(mass) and N:P.the highest foliar C_(mass) was observed in ectotrophic mycorrhiza(ECM)type(469.8mg g1)followed by that in arbuscular mycorrhiza(AM)type(443.884 mg g1)and nonmycorrhizal(NM)type(434.0 mg g^(-1)).The foliar N concentration was significantly higher in NM type(31.0mg g^(-1)).However,the AM type had the greater C:N value(19)than the other types although less variation in C_(mass) and N:P among abuscular types on AM strategy was observed.Foliar traits showed significant variation in response to precipita-tion(mean growing season and annual precipitation(GSP and MAP))and temperature(mean growing season and annual tem-peratures(GST and MAT))depending on different mycorrhizal strategies and arbuscular types.When the responses of all folia parameters to precipitation and temperature were compared,the influence of GSP on leaf traits was greater than the influence of GST. | Zhaoyong Shi Xiaogai Hou Yinglong Chen Fayuan Wangan Yanfang Miao | 2013 | Journal of Plant Ecology2013，6，4： | 5 |
| 7 | Review of Digital Elevation Model (DEM) Based Research on China Loess Plateau显示文摘The Loess Plateau is one of the hot research areas for its specific geographical features. In resent years, with the establishment of national multi-scale DEMs and the perfection of DEM based digital terrain analysis methods, new thoughts and methodologies have been constructed for the Loess Plateau research. This paper introduces the characteristics of DEM data, analyses the development stages of DEM applied in the Loess Plateau research, and discusses its further possible research direction. More discussions are focused on slope spectrum and its concept, as well as the significance in the Loess Plateau research. | Tang Guo'an Ge Shanshan Li Fayuan Zhou Jieyu | 2005 | Journal of Mountain Science2005，2，3： | 5 |
| 8 | Terrain relief periods of loess landforms based on terrain profiles of the Loess Plateau in northern Shaanxi Province,China显示文摘The Loess Plateau is densely covered by numerous types of gullies which represent different soil erosion intensities.Therefore,research on topographic variation features of the loess gullies is of great significance to environmental protection and ecological management.Using a5 m digital elevation model and data from a national geographic database,this paper studies different topographical areas of the Loess Plateau,including Shenmu,Suide,Yanchuan,Ganquan,Yijun,and Chunhua,to derive representative gully terrain profile data of the sampled areas.First,the profile data are standardized in MATLAB and then decomposed using the ensemble empirical mode decomposition method.Then,a significance test is performed on the results;the test confidence is 95% to 99%.The most reliable decomposition component is then used to calculate the relief period and size of the gullies.The results showed that relief periods of the Chunhua,Shenmu,Yijun,Yuanchuan,Ganquan,and Suide gullies are 1110.14 m,1096.85 m,1002.49 m,523.48 m,498.12 m,and 270.83 m,respectively.In terms of gully size,the loess landforms are sorted as loess fragmented tableland,aeolian and dune,loess tableland,loess ridge,loess hill and loess ridge,and loess hill,in descending order.Taken together,the gully terrain features of the sample areas and the results of the study are approximately consistent with the actual terrain profiles.Thus,we conclude that ensemble empirical mode decomposition is a reliable method for the study of the relief and topography of loess gullies. | Jianjun CAO Guoan TANG Xuan FANG Jilong LI Yongjuan LIU Yiting ZHANG Ying ZHU Fayuan LI | 2019 | Frontiers of Earth Science2019，13，2： | 4 |
| 9 | Characterization of a spruce budworm chitin deacetylase gene: Stage- and tissue-specific expression, and inhibition using RNA interference显示文摘 | Guoxing Quan Tim Ladd Jun Duan Fayuan Wen Daniel Doucet Michel Cusson Peter J. Krell | 2013 | Insect Biochemistry and Molecular Biology2013，，8： | 2 |
| 10 | Inoculation with arbuscular mycorrhizal fungus Acaulospora mellea decreses Cu phytoextraction by maize from Cucontaminated soil显示文摘 | WANG FAYUAN L1N XIANGUI YIN RUI | 2007 | Pedobiologia2007，51，2： | 1 |
| 11 | Achyranthes bidentata polysaccharides activate the Wnt/β-catenin signaling pathway to promote chondrocyte proliferation显示文摘 | Xiaping W Pingdong L Fayuan L | 2014 | Int J Mol Med2014，34，： | 1 |
| 12 | Research on the Slope Spectrum of the Loess Plateau 显示文摘 | Tang Guoan Li Fayuan Liu Xuejun | 2007 | Science in China (Series E)2007，50，1： | 1 |
| 13 | Effects of arbuscular mycorrhizal inoculation on the growth of Elsholtzia splendens and Zea mays and the activities of phosphatase and urease in a multi-metal- contaminated soil under sterilized conditions 显示文摘 | WANG Fayuan LIN Xiangui YIN Rui | 2006 | Applied Soil Ecology2006，31，： | 1 |
| 14 | Fifty years of political ecology in mainland China: Evolving responses of political affairs to eco- environmental issues 显示文摘 | Duan Changqun Xueqing Yang and Gao Fayuan 2000 | 2000 | Sinophere2000，2000，： | 1 |
| 15 | Heavy metal uptake by arbuscular mycorrhizas of Elsholtzia splendens and the potential for phytoremediation of contaminated soil 显示文摘 | Wang Fayuan Lin Xiangui Yin Rui | 2005 | Plant and Soil2005，269，12： | 1 |
| 16 | Heavy metal uptake by arbuscular mycorrhizas of Elsholtzia splendens and the potential for phytoremediation of contaminated soil显示文摘 | Fayuan Wang Xiangui Lin Rui Yin | 2005 | Plant and Soil (-)2005，，1： | 1 |
| 17 | Selection of appropriate host plants used in trap culture of arbuscular mycorrhizal fungi显示文摘 | Runjin Liu Fayuan Wang | 2003 | Mycorrhiza2003，，3： | 1 |
| 18 | Moment-independence global sensitivity analysis for the system with fuzzy failure state and its Kriging method显示文摘For the system with the fuzzy failure state, the effects of the input random variables and the fuzzy failure state on the fuzzy probability of failure for the structural system are studied, and the moment-independence global sensitivity analysis(GSA) model is proposed to quantitatively measure these effects. According to the fuzzy random theory, the fuzzy failure state is transformed into an equivalent new random variable for the system, and the complementary function of the membership function of the fuzzy failure state is defined as the cumulative distribution function(CDF) of the new random variable. After introducing the new random variable, the equivalent performance function of the original problem is built. The difference between the unconditional fuzzy probability of failure and conditional fuzzy probability of failure is defined as the moment-independent GSA index. In order to solve the proposed GSA index efficiently, the Kriging-based algorithm is developed to estimate the defined moment-independence GSA index. Two engineering examples are employed to verify the feasibility and rationality of the presented GSA model, and the advantages of the developed Kriging method are also illustrated. | LI Guijie XIE Chaoyang WEI Fayuan WANG Fengjun | 2018 | Journal of Systems Engineering and Electronics2018，29，3： | 1 |
| 19 | Modeling the evolu- tion of loess-covered landforms in the Loess Plateau of China using a DEM of underground bedrock surface 显示文摘 | Xiong Liyang Tang Guo' an Li Fayuan | 2014 | Geomorphology2014，209，3： | 1 |
| 20 | Arbuscular mycorrhizal status of wild plants in saline-alkaline soils of the Yellow River Delta显示文摘 | WANG Fayuan LIU Runjin LIN Xiangui | 2003 | Mycorrhiza2003，14，： | 1 |
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