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| 1 | Relationship Between Changes of River-lake Networks and Water Levels in Typical Regions of Taihu Lake Basin,China显示文摘The typical regions of the Taihu Lake Basin,China,were selected to analyze the variation characteristics of river-lake networks under intensive human activities.The characteristics of the fractal dimension of river networks and lakes for different periods were investigated and the influences of river system evolution on water level changes were further explored through the comparison of their fractal characters.The results are as follows:1) River network development of the study area is becoming more monotonous and more simple;the number of lakes is reducing significantly,and the water surface ratio has dropped significantly since the 1980s.2) The box dimension of the river networks in all the cities of the study area decreased slowly from the 1960s to the 1980s,while the decrease was significant from the 1980s to the 2000s.The variations of lake correlation dimension are similar to those of the river network box dimensions.This is unfavorable for the storage capacity of the river networks and lakes.3) The Hurst exponents of water levels were all between 0.5 and 1.0 from the 1960s to the 1980s,while decreased in the 2000s,indicating the decline in persistence and increase in the complexity of water level series.The paper draws a conclusion that the relationship between the fractal dimension of river-lake networks and the Hurst exponents of the water level series can reveal the impacts of river system changes on flood disasters to some extent:the disappearance of river networks and lakes will increase the possibility of flood occurrence. | YIN Yixing XU Youpeng CHEN Ying | 2012 | Chinese Geographical Science2012，22，6： | 6 |
| 2 | THE BLOW-UP PROPERTIES FOR A DEGENERATE SEMILINEAR PARABOL IC EQUATION WITH NONL OCAL SOURCE显示文摘This paper deals with the blow up properties of the positive solutions to the nonlocal degenerate semilinear parabolic equation u t-(x αu x) x=∫ a 0f(u) d x in (0,a)×(0,T) under homogeneous Dirichlet conditions. The local existence and uniqueness of classical solution are established. Under appropriate hypotheses, the global existence and blow up in finite time of positive solutions are obtained. It is also proved that the blow up set is almost the whole domain. This differs from the local case. Furthermore, the blow up rate is precisely determined for the special case: f(u)=u p,p>1. | Chen Youpeng Liu Qilin Xie ChunhongDept. of Math., Nanjing Univ.,Nanjing 210093,China. | 2002 | Applied Mathematics(A Journal of Chinese Universities)2002，17，4： | 5 |
| 3 | Oxidation behavior of ammonium in a 3-dimensional biofilm-electrode reactor显示文摘Excess nitrogenous compounds are detrimental to natural water systems and to human health. To completely realize autohy- drogenotrophic nitrogen removal, a novel 3-dimensional biofilm-electrode reactor was designed. Titanium was electroplated with ruthenium and used as the anode. Activated carbon fiber felt was used as the cathode. The reactor was separated into two chambers by a permeable membrane. The cathode chamber was filled with granular graphite and glass beads. The cathode and cathode chamber were inhabited with domesticated biofilm. In the absence of organic substances, a nitrogen removal efciency of up to 91% was achieved at DO levels of 3.42 ± 0.37 mg/L when the applied current density was only 0.02 mA/cm2. The oxidation of ammonium in biofilm- electrode reactors was also investigated. It was found that ammonium could be oxidized not only on the anode but also on particle electrodes in the cathode chamber of the biofilm-electrode reactor. Oxidation rates of ammonium and nitrogen removal efciency were found to be afected by the electric current loading on the biofilm-electrode reactor. The kinetic model of ammonium at diferent electric currents was analyzed by a first-order reaction kinetics equation. The regression analysis implied that when the current density was less than 0.02 mA/cm2, ammonium removal was positively correlated to the current density. However, when the current density was more than 0.02 mA/cm2, the electric current became a limiting factor for the oxidation rate of ammonium and nitrogen removal efciency. | Jinjing Tang Jinsong Guo Fang Fang Youpeng Chen Lijing Lei Lin Yang | 2013 | Journal of Environmental Sciences2013，25，12： | 3 |
| 4 | Change of Flood Patterns in China under the Influences of Climate Change and Human Activities显示文摘Based on the flood affected area(FA) data of the provinces in China from 1950 to 2005,the article discusses the change of the flood patterns in China,and investigates its relationship with climate change and human activities.The flood center shifted from North China and the Yangtze-Huaihe basin in the 1950s towards the south,north and west of China,and located in the south of the Yangtze River and South China after the 1990s.The FA in the western provinces was continuously on the rise since the 1950s.There are two characteristics for the future flood pattern in China.The pattern of 'flood in the south and drought in the north' depends on the north-south shift of the maximum rainfall region in eastern China.The flood intensification to the west of Hu Huanyong's line mainly results from the increase of rainfall,extreme precipitation and the melting of glaciers under the background of human activity magnification. | Yin Yixing Xu Youpeng Chen Ying | 2009 | Chinese Journal of Population,Resources and Environment2009，7，3： | 2 |
| 5 | Applications of Metal–Organic Frameworks and Their Derivatives in Electrochemical CO_(2)Reduction显示文摘Electrochemically reducing CO_(2)to more reduced chemical species is a promising way that not only enables the conversion of intermittent energy resources to stable fuels,but also helps to build a closed-loop anthropogenic carbon cycle.Among various electrocatalysts for electrochemical CO_(2)reduction,multifunctional metal–organic frameworks(MOFs)have been employed as highly efficient and selective heterogeneous electrocatalysts due to their ultrahigh porosity and topologically diverse structures.Up to now,great progress has been achieved in the design and synthesis of highly active and selective MOF-related catalysts for electrochemical CO_(2)reduction reaction(CO_(2)RR),and their corresponding reaction mechanisms have been thoroughly studied.In this review,we summarize the recent progress of applying MOFs and their derivatives in CO_(2)RR,with a focus on the design strategies for electrocatalysts and electrolyzers.We first discussed the reaction mechanisms for different CO_(2)RR products and introduced the commonly applied electrolyzer configurations in the current CO_(2)RR system.Then,an overview of several categories of products(CO,HCOOH,CH_(4),CH_(3)OH,and multi-carbon chemicals)generated from MOFs or their derivatives via CO_(2)RR was discussed.Finally,we offer some insights and perspectives for the future development of MOFs and their derivatives in electrochemical CO_(2)reduction.We aim to provide new insights into this field and further guide future research for large-scale applications. | Chengbo Li Yuan Ji Youpeng Wang Chunxiao Liu Zhaoyang Chen Jialin Tang Yawei Hong Xu Li Tingting Zheng Qiu Jiang Chuan Xia | 2023 | Nano-Micro Letters2023，15，8： | 2 |
| 6 | Phosphorus fractions and phosphate sorption-release characteristics relevant to the soil composition of water-level-fluctuating zone of Three Gorges Reservoir显示文摘 | Bin Zhang Fang Fang Jinsong Guo Youpeng Chen Zhe Li Songsong Guo | 2011 | Ecological Engineering2011，，： | 2 |
| 7 | GLOBAL BLOW-UP FOR A HEAT SYSTEM WITH LOCALIZED SOURCES AND ABSORPTIONS显示文摘在这,在那里的纸被建立整体存在并且有限timeblow起来下列抛物线的系统 u_t = Δu + v^p 的非否定的答案结果( x_0 , t )-au^r, x ∈ Ω, t > 0 , v_t = Δv + u^q ( x_0 , t )-bv^s, x ∈ Ω, t >在 x_0 ∈ Ω 是一个定点的地方, 0 使条件和非否定的原始数据遭到到 homogeneousDirichlet , p , q , r , s ≥ 第1a 一, b > 0 个are 常数。处于状况什么时候非否定的答案(u, v ) 上面,问题在有限时间骤起,发作是全球的,这不同于本地来源盒子,这被显示出。 | Chen Youpeng | 2007 | Applied Mathematics(A Journal of Chinese Universities)2007，22，2： | 1 |
| 8 | Blow-Up for Degenerate Parabolic Equations with Nonlocal Source 显示文摘 | Chen Youpeng Liu Qilin Xie Chunhong | 2003 | Pro AMS2003，132，1： | 1 |
| 9 | Relationship between Flood/ Drought Disasters and ENSO fi'om 1857 to 2003 in the Taihu Lake basin, China显示文摘 | Yin Yixing Xu Youpeng Chen Ying | 2009 | Quatemarylnternational2009，208，12： | 1 |
| 10 | Impacts of land use change scenarios on storm-runoff generation in Xitiaoxi basin, China显示文摘 | CHEN Ying XU Youpeng YIN Yixing | 2009 | Quaternary Internaional2009，208，： | 1 |
| 11 | Blow-up for a porous medi?um equation with a localized source显示文摘 | Chen Youpeng Xie Chunhong | 2004 | Appl Math Comput2004，159，1： | 1 |
| 12 | Blow- up for porous medium equation with a localized source显示文摘 | CHEN Youpeng XIE Chunhortg | 2004 | Appl Math Compution2004，159，： | 1 |
| 13 | Largescale flourine-doped textured transparent conducting Sn02films deposited by APCVD显示文摘 | Ma Honglei Zhang Deheng Chen Youpeng | 1996 | Proceedings of SPIE-The International Society for Optical Engineering1996，2897，6： | 1 |
| 14 | The development of the alt electric propulsion warship by the United States Navy 显示文摘 | CHEN Yaxin | 2002 | Marine Electric & Electronic Technology2002，22，3： | 1 |
| 15 | Global blow-up for a localized nonlinear parabolic equation with a nonlocal boundary condition显示文摘 | Youpeng Chen Lihua Liu | 2011 | Journal of Mathematical Analysis and Applications2011，，2： | 1 |
| 16 | Radiation-induced degradation of methyl orange in aqueous solutions 显示文摘 | CHEN Youpeng L1U Shaoyang HAN Qingyu | 2008 | Chemosphere2008，72，4： | 1 |
| 17 | High-speed Stokes vector receiver enabled by a spin-dependent optical grating显示文摘Stokes vector direct detection is a promising,cost-effective technology for short-distance communication applications.Here,we design and fabricate a spin-dependent liquid crystal grating to detect light polarization states.By separating the circular and linear components of incident light,the polarization states can be resolved with accuracy of up to 0.25°.We achieved Stokes vector direct detection of quadrature phase-shift keying(QPSK),8 PSK,and16-ary quadrature amplitude modulation signals with 32,16,and 16 GBd rates,respectively.We integrated the system,including the grating,photodetectors,and optical elements,on a miniaturized printed circuit board and demonstrated high-speed optical communications with 16 GBd rate QPSK signals. | YOUPENG XIE TING LEI DAWEI WANG JIANXIN REN YANMENG DAI YANJUN CHEN LUPING DU BO LIU ZHAOHUI LI XIAOCONG YUAN | 2021 | Photonics Research2021，9，8： | 1 |
| 18 | Treatment of landfill leachate using a combined stripping,Fenton,SBR,and coagulation process 显示文摘 | Guo Jinsong Abdulhussain A A Chen Youpeng | 2010 | Journal of Hazardous Materials2010，178，123： | 1 |
| 19 | The heart-protective mechanism of Qishaowuwei formula on murine viral myocarditis induced by CVB3显示文摘 | Liu Fengqin Wang Yulin Zhu Xiaoxin Jin Youpeng Chen Yan Wang Qing-qing Chang Hong Song Jia Huang Lei | 2009 | Journal of Ethnopharmacology2009，，2： | 1 |
| 20 | Blow-up for a system of heat equations with nonlocal sources and absorption显示文摘 | CHEN Youpeng | 2004 | Computers and Mathematics with Applications2004，48，： | 1 |
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