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18篇 您的检索式:作者名="Wan Ben"
    题名 作者 年代 出处 被引量
1Identification Standard for ENSO Events and Its Application to Climate Monitoring and Prediction in China显示文摘The El Ni?o–Southern Oscillation(ENSO)reflects anomalous variations in the sea surface temperature(SST)and atmospheric circulation over the tropical central–eastern Pacific.It remarkably impacts on weather and climate worldwide,so monitoring and prediction of ENSO draw intensive research.However,there is not yet a unique standard internationally for identifying the timing,intensity,and type of ENSO events.The National Climate Center of China Meteorological Administration(NCC/CMA)has led the effort to establish a national identification standard of ENSO events,which was officially endorsed by the National Standardization Administration of China and implemented operationally in NCC/CMA in 2017.In this paper,two key aspects of this standard are introduced.First,the Ni?o3.4 SST anomaly index,which is well-recognized in the international ENSO research community and used operationally in the US,has replaced the previous Ni?o Z index and been used to identify the start,end,and peak times,and intensity of ENSO events.Second,two new indices—the eastern Pacific ENSO(EP)index and the central Pacific ENSO(CP)index,based on the SST conditions in Ni?o3 and Ni?o4 region respectively,are calculated to first determine the ENSO type before monitoring and assessing the impacts of ENSO on China’s climate.With this standard,all historical ENSO events since 1950 are consistently re-identified;their distinct properties are diagnosed and presented;and the impacts of ENSO events under different types on China’s climate are re-assessed.This standard is also employed to validate the intensity,grade,and type of the ENSO events predicted by the NCC/CMA operational ENSO prediction system.The new standard and the thus derived unified set of re-analyzed historical ENSO events and associated information provide a good reference for better monitoring and prediction of future ENSO events.Hong-Li REN Bo LU Jianghua WAN Ben TIAN Peiqun ZHANG 2018Journal of Meteorological Research2018,32,6:16
2The China Multi-Model Ensemble Prediction System and Its Application to Flood-Season Prediction in 2018显示文摘Multi-model ensemble prediction is an effective approach for improving the prediction skill short-term climate prediction and evaluating related uncertainties. Based on a combination of localized operation outputs of Chinese climate models and imported forecast data of some international operational models, the National Climate Center of the China Meteorological Administration has established the China multi-model ensemble prediction system version 1.0 (CMMEv1.0) for monthly-seasonal prediction of primary climate variability modes and climate elements. We verified the real-time forecasts of CMMEv1.0 for the 2018 flood season (June-August) starting from March 2018 and evaluated the 1991-2016 hindcasts of CMMEv1.0. The results show that CMMEv1.0 has a significantly high prediction skill for global sea surface temperature (SST) anomalies, especially for the El Nino-Southern Oscillation (ENSO) in the tropical central-eastern Pacific. Additionally, its prediction skill for the North Atlantic SST triple (NAST) mode is high, but is relatively low for the Indian Ocean Dipole (IOD) mode. Moreover, CMMEv1.0 has high skills in predicting the western Pacific subtropical high (WPSH) and East Asian summer monsoon (EASM) in the June-July-August (JJA) season. The JJA air temperature in the CMMEv1.0 is predicted with a fairly high skill in most regions of China, while the JJA precipitation exhibits some skills only in northwestern and eastern China. For real-time forecasts in March-August 2018, CMMEv1.0 has accurately predicted the ENSO phase transition from cold to neutral in the tropical central-eastern Pacific and captures evolutions of the NAST and IOD indices in general. The system has also captured the main features of the summer WPSH and EASM indices in 2018, except that the predicted EASM is slightly weaker than the observed. Furthermore, CMMEv1.0 has also successfully predicted warmer air temperatures in northern China and captured the primary rainbelt over northern China, except that it predicted much more precipitation in the middle and lower reaches of the Yangtze River than observation.Hong-Li REN Yujie WU Qing BAO Jiehua MA Changzheng LIU Jianghua WAN Qiaoping LI Xiaofei WU Ying LIU Ben TIAN Joshua-Xiouhua FU Jianqi SUN 2019Journal of Meteorological Research2019,33,3:16
3Prediction of Primary Climate Variability Modes at the Beijing Climate Center显示文摘Climate variability modes, usually known as primary climate phenomena, are well recognized as the most important predictability sources in subseasonal–interannual climate prediction. This paper begins by reviewing the research and development carried out, and the recent progress made, at the Beijing Climate Center(BCC) in predicting some primary climate variability modes. These include the El Ni?o–Southern Oscillation(ENSO), Madden–Julian Oscillation(MJO), and Arctic Oscillation(AO), on global scales, as well as the sea surface temperature(SST) modes in the Indian Ocean and North Atlantic, western Pacific subtropical high(WPSH), and the East Asian winter and summer monsoons(EAWM and EASM, respectively), on regional scales. Based on its latest climate and statistical models, the BCC has established a climate phenomenon prediction system(CPPS) and completed a hindcast experiment for the period 1991–2014. The performance of the CPPS in predicting such climate variability modes is systematically evaluated. The results show that skillful predictions have been made for ENSO, MJO, the Indian Ocean basin mode, the WPSH, and partly for the EASM, whereas less skillful predictions were made for the Indian Ocean Dipole(IOD) and North Atlantic SST Tripole, and no clear skill at all for the AO, subtropical IOD, and EAWM. Improvements in the prediction of these climate variability modes with low skill need to be achieved by improving the BCC's climate models, developing physically based statistical models as well as correction methods for model predictions.Some of the monitoring/prediction products of the BCC-CPPS are also introduced in this paper.Hong-Li REN Fei-Fei JIN Lianchun SONG Bo LU Ben TIAN Jinqing ZUO Ying LIU Jie WU Chongbo ZHAO Yu NIE Peiqun ZHANG Jin BA Yujie WU Jianghua WAN Yuping YAN Fang ZHOU 2017Journal of Meteorological Research2017,31,1:13
4Evaluation of the Prostate Imaging Reporting and Data System for Magnetic Resonance Imaging Diagnosis of Prostate Cancer in Patients with Prostate-specific Antigen 〈20 ng/ml显示文摘Xuan Wang Jian-Ye Wang Chun-Mei Li Ya-Qun Zhang Jian-Long Wang Ben Wan Wei Zhang Min Chen Sa-Ying Li Gang Wan Ming Liu 2016Chinese Medical Journal2016,,12:13
5Photoselective Vaporesection of the Prostate with an End-firing Lithium Triborate Crystal Laser显示文摘Xin Wang Ming Liu Yao-Guang Zhang Sheng-Cai Zhu Ben Wan Jian-Ye Wang 2017Chinese Medical Journal2017,,6:3
6Laparoendoscopic single-site radical prostatectomy: technique and initial outcomes显示文摘ZHU Gang ZHANG Ya-qun Philippe Grange Kilian Walsh JIN Bin ZHANG Yao-guang CHEN Xin WANG xuan WEI Dong WAN Ben WANG Jian-ye 2012Chinese Medical Journal2012,,21:2
7Managing enterprises and ERP systems: a contingency model for the enterprization of operations显示文摘Ben Clegg Yi Wan 2013International Journal of Operations & Production Management2013,,11:1
8Synthesis,characterization,and tunable wettability of poly (ionic liquid) brushes via nitroxide-mediated radical polymerization (NMP)显示文摘Well-defined poly(ionic liquid) brushes with tunable wettability are successfully synthesized via nitroxide-mediated radical polymerization.X-ray photoelectron spectroscopy,attenuated total reflection infrared spectroscopy and static water contact angle measurements are used to monitor each step.Ellipsometry,nuclear magnetic resonance(1H and 13C) spectra and gel permeation chromatographic measurements reveal that there is a linear increase in polymer film thickness with polymerization time,indicating that chain growth from the surface is a controlled/'living' polymerization.The surface morphology was measured by atomic force microscopy.Moreover,the surfaces of the poly(ionic liquid) brushes with tunable wettability and reversible switching between hydrophilicity and hydrophobicity can be easily achieved by counteranion exchange.YAG Wu HE XiaoJing GAO JinZhang GUO Hao HE XiaoYan WAN Fei ZHAO XiuLi YU Yan PEI Ben 2010Chinese Science Bulletin2010,55,31:1
9Nascent tar formation during polyvinylchloride (PVC) pyrolysis显示文摘Gui Ben Qiao Yu Wan Dan 2013Proceed Combust Institute2013,34,2:1
10Stability of co-continuous apolystyrene / poly(ether-ester) blends in shear flow显示文摘HARM VEENSTRA BEN NORDER JAAP WAN DAM 1999Polymer1999,40,:1
11Expression,Purification,Characteristics and Homology Modeling of the HMGS from Streptococcus pneumoniae显示文摘To understand the molecular basis for a potential reaction mechanism and develop novel antibiotics with homology modeling for 3-hydroxy-3-methylglutaryl coenzyme A(HMG-CoA) synthase(HMGS).Methods The genetic engineering technology and the composer module of SYBYL7.0 program were used,while the HMGS three-dimensional structure was analyzed by homology modeling.Results The mvaS gene was cloned from Streptococcus pneumoniae and overexpressed in Escherichia coli from a pET28 vector.The expressed enzyme(about 46 kDa) was purified by affinity chromatography with a specific activity of 3.24 μmol/min/mg.Optimal conditions were pH 9.75 and 10 mmol/L MgCl2 at 37 ℃.The Vmax and Km were 4.69 μmol/min/mg and 213 μmol/L respectively.The 3D model of S.pneumoniae HMGS was established based on structure template of HMGS of Enterococcus faecalis.Conclusion The structure of HMGS will facilitate the structure-based design of alternative drugs to cholesterol-lowering therapies or to novel antibiotics to the Gram-positive cocci,whereas the recombinant HMGS will prove useful for drug development against a different enzyme in the mevalonate pathway.YA-LI BEN GU-ZHEN CUI CHEN LI RUI HAN JIE ZHANG QING-YE ZHANG JIAN WAN DE-LI LIU 2009Biomedical and Environmental Sciences2009,22,3:1
12Optimum Arrange- ment of Gate and Vent Locations for RTM Process Design Us- ing a Mesh Distance-Based Approach显示文摘Jiang Shmdiang Zhang Chuck Wan Ben 2002Composites Part A: Applied Science and Man:acturing2002,33,4:1
13Report of a Study on IMRT Planning Strategies for Ethmoid Sinus Cancer显示文摘Filip Claus Ben Mijnheer Coen Rasch Thomas Bortfeld Benedick Fraass Werner De Gersem Holger Wirtz Cordelia Hoinkis Byung Chul Cho Lai Wan Dora Kwong Hoonsik Bae Karin Muller Wilfried De Neve 2002Strahlentherapie und Onkologie2002,,10:1
14Synthesis of a New Family of Green Light Emitting Material Containing Both Hole and Electron Transporting Units显示文摘Two new molecules containing oxadiazoles and triphenylamine-stilbene moiety were synthesized. Their luminescent properties were determined, which indicated that they had strong green fluorescent properties. All the two molecules can be used as green organic electrolumine- scence materials.Hai Tao YU1, Wan Xuan ZHANG1, Wu Xin ZHOU1, Teruo MASTUURA2, Ji Ben MENG1* 1Department of Chemistry, Nankai University, Tianjin 300071 2Emeritus Professor of Kyoto University, Kyoto 615-8195, Japan 2002Chinese Chemical Letters2002,13,10:0
15Revealing the interlaminar shear failure behavior of unidirectional laminate under combined compression-shear loads显示文摘Due to the coupling effects between stresses in different directions,the mechanical behavior of an ad-vanced composite material under multiaxial loading is extremely complex.In this study,the influence of through-thickness compressive stress on the interlaminar shear performance of a carbon fiber-reinforced composite was experimentally investigated.Hollow cylindrical unidirectional laminate specimens were fabricated to conduct combined compression-shear tests,and the fracture morphologies of the specimens were characterized to reveal their failure behavior.The results indicate that a moderate compression load significantly enhanced the shear properties of the laminate by inhibiting crack propagation and improv-ing the friction effect.The shear strength and modulus of a laminate specimen subjected to combined stresses improved up to a maximum of 76%and 231%,respectively,over those of an equivalent specimen subjected to pure shear.However,as the applied through-thickness load approached the compressive strength of the laminate,the specimen shear capacity began to decline owing to the transition of frac-ture mechanisms.Indeed,the specimens exhibited mixed failure modes corresponding to the different stress states,which were induced by the combined effects of through-thickness compressive and shear stresses.As the applied through-thickness compressive stress increased,the dominant failure mode of the laminate specimen changed from fiber-matrix debonding to fiber shearing and then to fiber break-age,resulting in various shear performances.Yueran Zhao Jian Zang Ben Jia Junchao Yang Xiaopeng Wan Wenzhi Wang Xiangming Chen 2023Journal of Materials Science & Technology2023,,26:0
16Regulation of hypoxic stress and oxidative stress in bone grafting: Current trends and future perspectives显示文摘Tissue engineering aims to offer large-scale replacement of damaged organs using implants with the com-bination of cells,growth factors and scaffolds.However,the intra/peri-implant region is exposed to se-vere hypoxic stress and oxidative stress during the early stage of implantation with bone graft materials,which endangers the survival,proliferation and differentiation of seed cells within the implants as well as the host cells surrounding the implants.If the bone graft material could spontaneously and intelligently regulate the hypoxic stress and oxidative stress to a moderate level,it will facilitate the vascularization of the implants and the rapid regeneration of the bone tissue.In this review,we will first introduce the signaling pathways of cellular response under hypoxic stress and oxidative stress,then present the clas-sical material designs and examples in response to hypoxic stress and oxidative stress.And finally,we will address the important role of epigenetic mechanisms in the regulation of hypoxic stress and oxida-tive stress and describe the potential applications and prospective smart bone graft materials based on novel epigenetic factors against hypoxic stress and oxidative stress in bone repair.The main content of this review is summarized in the following graphical abstract.Hao Hu Xiao Liu Jun Chen Shangbin Cui Hualin Yi Gang Wang Renxian Wang Tiansheng Zheng Ben Wan Zhiyu Zhou Yong Wan Manman Gao Dafu Chen Xuenong Zou 2023Journal of Materials Science & Technology2023,,26:0
17H-Bonding Self-assembled Template-directed Synthesis of a Reactive Amide-bridged Ladder Polyvinylsiloxane显示文摘You Zhi WAN Ying Hua LIU Ping XIE Rong Ben ZHANG 2006Chinese Chemical Letters2006,17,10:0
18Preparation of Kenaf Biochar and Its Adsorption Properties for Methylene Blue显示文摘The toxic dyestuff's from printing and dyeing wastewater have caused serious damages to the ecological environ-ment,thus exploring effective methods to remove them having become a key topic.Here,a series of biochar sam-ples were synthesized form kenaf to adsorb methylene blue(MB),which was acted as the dye representative for the test of adsorption capacity due to the presence of abundant double bond and aroma tic heterocyclic ring.By tuning the raw materials and pyrolysis temperature,a super adsorption capacity about 164.21 mg·g^(-1) was obtained over the biochar that pyrolyzed at 700℃ with the kenaf fiber as raw material Through the physical adsorption,elemental analysis,FTIR spectra and NH_(3)-TPD,it was found the high surface area and pore volume of biochar played a key role in the adsorption of MB,and the acidic sites would also assist the adsorption process.Besides,the adsorption kinetic model was ftted and calculated,implying the MB physically adsorbed on the bio-char rapidly and then occurred chemical adsorption on the acidic sites.In addition,through KBC700 recycling experiments,it was found that kenaf biochar had a good binding force to MB,which effectively avoided secondary pollution.This work provides important insights for the adsorption mechanism of MB by biochar,also offers some guidance for the further synthesis of biochar from various biomass.Xin Wan Zhigang Xia Xiaoli Yang Chenfeng Zhou Yuanming Zhang Haoxi Ben Guangting Han Wei Jiang 2022Journal of Renewable Materials2022,10,12:0
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