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76篇 您的检索式:作者名="N. S. CHEN"
    题名 作者 年代 出处 被引量
1GIS-based risk analysis of debris flow:an application in Sichuan,southwest China显示文摘Debris flow is a serious geologic hazard in China.It is estimated that nationally debris flows cause up to 2 billion RMB(250 million US$) in damages and 300-600 deaths and injuries annually.To mitigate debris flow hazards,it is necessary to map,model,and identify zones of debris flow hazards and vulnerability as to inform the local people about the potential risk with a geographic information system.This research presents a regional scale case study modeling debris flow risk(hazard and vulnerability) in Sichuan Province,Southwestern China.In this area,3,290 debris flows have been identified and the spatial-temporal distribution and activity characteristics of them have been documented.Based on the available meteorological data,a Digital Elevation Model with the rate of 1:250,000 and a regional geological map,the 24-hr rainfall threshold(y) for debris flow occurrence is closely related(significant at 99% confidence level) to the index(x) defined using a geology factor(rock hardness:a) and a topographical factor(channel gradient:d) where y = 21 + 10200 / x,in which x = 2.7 × ea + 1000 × d.The discipline is constructive in developing the rainfall threshold for debris flow activity in remote mountainous areas that lack data.For a given watershed,a four-level debris flow hazard map is developed by comparing the rainfall threshold to the design rainfall intensities with 50-,20-,and 5-year average recurrence intervals,respectively.The degree of debris flow vulnerability is determined by the watershed socio-economic conditions.A four-class debris flow risk map,at the final phase of the research,is generated by combining debris flow hazards and vulnerability.With the debris flow risk assessment,the Sichuan Province is classified into the slight,moderate,severe and very severe regions,which accounts for 36%,19%,20% and 25% of total area respectively.B. F. DI N. S. CHEN P. CUI Z. L. LI Y. P. HE Y. C. GAO 2008International Journal of Sediment Research2008,23,2:19
2Interactions of IL-12A and IL-12B Polymorphisms on the Risk of Cervical Cancer in Chinese Women显示文摘Chen, X. J. Han, S. P. Wang, S. N. Zhou, X. Y. Zhang, M. F. Dong, J. Shi, X. Y. Qian, N. F. Wang, X. R. Wei, Q. Y. Shen, H. B. Hu, Z.B. 2009南京医科大学学报(自然科学版)2009,29,3:16
3Variant alleles of TGFB1 and TGFBR2 are associated with a decreased risk of gastric cancer in a Chinese population显示文摘Jin, G. F. Wang, L. N. Chen, W. S. Hu, Z. B. Zhou, Y. Tan, Y. F. Wang, J. M. Hua, Z. L. Ding, W. L. Shen, J. Zhang, Z. F. Wang, X. R. Xul, Y. C. Shen, H. B. 2007南京医科大学学报(自然科学版)2007,27,5:7
4An Improvement on the Efficiency of a Single Rotor Transonic Compressor by Reducing the Shock Wave Strength on the Blade Suction Surfaces显示文摘It is well known that increasing the rotational velocity is an effective way to increase the total pressure ratio. With increasing flow velocity especially under the condition of transonic flow in the supersonic region, where exist strong shock waves, the shock wave loss becomes main and important. Simultaneously, there occurs boundary layer separation due to the shock wave / boundary layer interaction. In the present paper the transonic compressor blades were studied and analyzed to find a proper and simple way to reduce the shock wave loss by optimizing the suction surface configuration or controlling the gradient of isentropic Mach number on the suction surface. A Navier-Stokes solver combined with a modified design algorithm was developed and used. The NASA single rotor for transonic flow compressor was served as a numerical example to show the effectiveness of this method. Two cases for both original and modified rotors were analyzed and compared.S. J. Geng N. X. Chen H. W. Zhang W. G. Huang 2012Journal of Thermal Science2012,21,2:4
5Guidelines and Good Clinical Practice Recommendations for Contrast Enhanced Ultrasound (CEUS) in the Liver – Update 2012显示文摘M. Claudon C. Dietrich B. Choi D. Cosgrove M. Kudo C. Nols?e F. Piscaglia S. Wilson R. Barr M. Chammas N. Chaubal M.-H. Chen D. Clevert J. Correas H. Ding F. Forsberg J. Fowlkes R. Gibson B. Goldberg N. Lassau E. Leen R. Mattrey F. Moriyasu L. Solbiati H. 2013Ultraschall in Med2013,,01:3
6Guidelines and Good Clinical Practice Recommendations for Contrast Enhanced Ultrasound (CEUS) in the Liver – Update 2012显示文摘M. Claudon C. Dietrich B. Choi D. Cosgrove M. Kudo C. Nols?e F. Piscaglia S. Wilson R. Barr M. Chammas N. Chaubal M.-H. Chen D. Clevert J. Correas H. Ding F. Forsberg J. Fowlkes R. Gibson B. Goldberg N. Lassau E. Leen R. Mattrey F. Moriyasu L. Solbiati H. 2013Ultraschall in Med2013,,01:3
7Hydrologic impact of regional climate change for the snowfed and glacierfed river basins in the Republic of Tajikistan: hydrological response of flow to climate change显示文摘S. Kure S. Jang N. Ohara M. L. Kavvas Z. Q. Chen 2013Hydrol Process2013,,26:2
82-14 Investigation of the Thermonuclear 18Ne(α, p)21Na Reaction Rate via Resonant Elastic Scattering of 21Na + p显示文摘A nuclear astrophysics experiment was performed at CRIB (CNS low-energy Radioactive-Ion Beam separator)on Mar. 2011. The goal of this experiment is to study the reaction rate of 18Ne(,p)21Na reaction, which mightbe a key breakout reaction from the hot CNO cycle to rp-process in X-ray burst and nova. Yet its reaction rate ispoorly known.Explosive hydrogen burning is thought to be the main source of energy generation and a source of nucleosynthesisin X-ray burst and nova[1;2]. For example, XRBs are characterized by a sudden increase of X-ray emission withinonly a few seconds to a total energy output of about 1040 ergs, which is observed to repeat with some regularity.The recurrence time for single bursts can range from hours to days at the typical temperature of 0.4~2 GK. Thebursts have been interpreted as being generated by thermonuclear runaway on the surface of a neutron star thataccretes H- and He-rich material from a less evolved companion star in a close binary system. As shown in Fig. 1,under its typical temperature, the hydrogen burning in X-ray burst occurs from the hot CNO cycle:Zhang Liyong He Jianjun Xu Shiwei H.Yamaguchi S. Kubono Y.Wakabayashi Chen Size Hu Jun Ma Peng Y. Togano T. Hashimoto D. Kahl T. Teranishi Chen Ruofu Wang Hongwei Tian Wendong Guo Bing S. Hayakawa N. Iwasa T. Yamada T. Komatsubara 2014IMP & HIRFL Annual Report2014,,1:2
9Hyperglycemia, Insulin Resistance, Impaired Pancreatic β-Cell Function, and Risk of Pancreatic Cancer显示文摘Brian M. Wolpin Ying Bao Zhi Rong Qian Chen Wu Peter Kraft Shuji Ogino Meir J. Stampfer Kaori Sato Jing Ma Julie E. Buring Howard D. Sesso I-Min Lee John Michael Gaziano Anne McTiernan Lawrence S. Phillips Barbara B. Cochrane Michael N. Pollak JoAnn E. Ma 2013JNCI Journal of the National Cancer Institute2013,,14:2
10Epitaxy of rare earth element fluorcarbonate minerals from carbonatite dyke at Bayan Obo, Inner Mongolia, China显示文摘Rare earth element fluorocarbonate minerals such as bastnaesite and parisite are firstly discovered in carbonatite dykes from Bayan Obo, Inner Mongolia, China. Bastnaesite rarely occurs as homogeneously single crystal, but contains microfine phase of parisite. They form regular intergrowth along (0001) plane net, which is identified as epitaxy. This eptactic texture results from the variation of chemical composition of crystallizing agents of those minerals that crystallize directly from carbonatite magma.Xueming Yang Peishan Zhang Kejie Tao Xiaoyong Yang Shuangxi Chen Minglong Zou M. J. Le Bas R. N. Wilson R. Ranson L. S. Campbell et al. 1998Chinese Science Bulletin1998,43,13:2
11Conversion coatings of Mg-alloy AZ91D using trihexyl(tetradecyl) phosphonium bis(trifluoromethanesulfonyl)amide ionic liquid显示文摘This work reveals the performance of a trihexyl(tetradecyl)phosphonium bis(trifluoromethanesulfonyl)amide ([P6,6,6,14][NTf2]) ionic liquid (IL) conversion coating upon AZ91D. Such conversion coatings represent a novel avenue for chromate replacement. An optimization of coating performance was pursued by careful alloy pretreatment to generate a surface on which the coating performs best, as the AZ91 substrate is distinctly different from pure or dilute Mg alloys. The results reveal that a functional conversion coating can be achieved, retarding anodic dissolution kinetics, causing a significant decrease in corrosion rate. The coating efficacy is closely tied to the pretreatment performed, which dictates both the microstructural and electrochemical heterogeneity of the surface. The resulting coatings were found to contain MgxFx and phosphonium cation related components, the proportions of which were dependent on the pretreatment.HOWLETT P. C. GRAMET S. LIN J. EFTHIMIADIS J. CHEN X. B. BIRBILIS N. FORSYTH M. 2012Science China Chemistry2012,55,8:2
12Seismo-ionospheric precursor of the 2008 Mw7.9 Wenchuan earthquake observed by FORMOSAT-3/COSMIC显示文摘Chun-Chieh Hsiao J. Y. Liu K.-I. Oyama N. L. Yen Y. A. Liou S. S. Chen J. J. Miau 2010GPS Solutions2010,,1:1
13A parameterization of low visibilities for hazy days in the North China Plain显示文摘Chen J. Zhao C. S. Ma N. Liu P. F. G?bel T. Hallbauer E. Deng Z. Z. Ran L. Xu W. Y. Liang Z. Liu H. J. Yan P. Zhou X. J. Wiedensohler A 20122012 (271)2012,,271:1
14Underground water Cherenkov muon detector array with the Tibet air shower array for gamma-ray astronomy in the 100 TeV region显示文摘M. Amenomori S. Ayabe X. J. Bi D. Chen S. W. Cui Danzengluobu L. K. Ding X. H. Ding C. F. Feng Zhaoyang Feng Z. Y. Feng X. Y. Gao Q. X. Geng H. W. Guo H. H. He M. He K. Hibino N. Hotta Haibing Hu H. B. Hu J. Huang Q. Huang H. Y. Jia F. Kajino K. Kasahara 2007Astrophysics and Space Science (-)2007,,1:1
15Inhibitory effects of curcumin on gastric cancer cells: a proteomic study of molecular targets显示文摘X.Z. Cai W.Y. Huang Y. Qiao S.Y. Du Y. Chen D. Chen S. Yu R.C. Che N. Liu Y. Jiang 2012Phytomedicine2012,,:1
16A systematic review and meta‐analysis of adjuvant interferon therapy after curative treatment for patients with viral hepatitis‐related hepatocellular carcinoma显示文摘T.‐S. Huang Y.‐C. Shyu H.‐Y. Chen S.‐S. Yuan J.‐N. Shih P.‐J. Chen 2013J Viral Hepat2013,,10:1
17Raman-spectroscopy study of PbTiO3 thin films grown on Si substrates by metalorganic chemical vapor deposition显示文摘W. -H. Ma M. -S. Zhang L. Shun Z. Yin Q. Chen Y. -F. Chen N. -B. Ming 1996Applied Physics A Materials Science & Processing1996,,3:1
18Propagation of thickness-twist waves in a multi-sectioned piezoelectric plate of 6?mm crystals显示文摘J. S. Yang Z. G. Chen Y. T. Hu S. N. Jiang S. H. Guo 2007Archive of Applied Mechanics2007,,10:1
19Hyperglycemia, Insulin Resistance, Impaired Pancreatic β-Cell Function, and Risk of Pancreatic Cancer显示文摘Brian M. Wolpin Ying Bao Zhi Rong Qian Chen Wu Peter Kraft Shuji Ogino Meir J. Stampfer Kaori Sato Jing Ma Julie E. Buring Howard D. Sesso I-Min Lee John Michael Gaziano Anne McTiernan Lawrence S. Phillips Barbara B. Cochrane Michael N. Pollak JoAnn E. Ma 2013JNCI Journal of the National Cancer Institute2013,,14:1
20Adjuvant Hepatic Intra-arterial Iodine-131-Lipiodol Following Curative Resection of Hepatocellular Carcinoma: A Prospective Randomized Trial显示文摘A. Y. F. Chung L. L. P. J. Ooi D. Machin S. B. Tan B. K. P. Goh J. S. Wong Y. M. Chen P. C. N. Li M. Gandhi C. H. Thng S. W. K. Yu B. S. Tan R. H. G. Lo A. M. M. Htoo K. H. Tay F. X. Sundram A. S. W. Goh S. P. Chew K. H. Liau P. K. H. Chow K. H. Tay Y. M. 2013World Journal of Surgery2013,,6:1
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