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Application analysis of empirical mode decomposition and phase space reconstruction in dam time-varying characteristic

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Science china(Technological Sciences) 2010年第6期53卷 1711-1716页

作者： ZHANG ZhiJun1,2.3,GU ChongShi1,2.BAO TengFei1,2.ZHANG Lan1,2.& YU Hong1,2.1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai university,nanjing 2.0098,{2. 2.National Engineering Research center of Water Resources Efficient Utilization and Engineering Safety,Hohai university,nanjing 2.0098,{2. 3 Department of Civil,Environmental and Geomatic Engineering,Swiss Federal Institute of Technology,Zurich 8093,Switzerland 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China2. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 China3. Department of Civil Environmental and Geomatic Engineering Swiss Federal Institute of Technology Zurich 8093 Switzerland

In view of some courses of the time-varying characteristics processing in the analysis of dam deformation,the paper proposes a new method to analyze the dam time-varying characteristic based on the empirical mode decomposition and phase space reconstruction *** of all,to reduce the influences on the traditional statistical model from human factors and assure the analysis accuracy,response variables of the time-varying characteristic are obtained by the way of the empirical mode decomposition;and then,a phase plane of those variables is reconstructed to investigate their processing *** methods have already been applied to an actual project and the results showed that data interpretation with the assists of empirical mode decomposition and phase space reconstruction is effective in analyzing the perturbations of response variables,explicit in reflecting the entire development process,and valid for obtaining the evolution rules of the time-varying *** methodology is a powerful technical support for people to further master the rules of dam operation.

关键词： dam safety monitoring dam time-varying characteristic empirical mode decomposition phase space reconstruction

Half-lives and fine structure for the α decay of deformed even-even nuclei

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Science china(Physics,Mechanics & Astronomy) 2011年第S1期54卷 24-31页

作者： NI DongDong1,2.& REN ZhongZhou1,2.3 1Department of Physics, nanjing university, nanjing 2.0093,{2. 2.avli Institute for Theoretical Physics{2., Beijing 100190,{2. 3center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000,{2. nanjing Univ Dept Phys Nanjing 210093 Jiangsu Peoples R China Kavli Inst Theoret Phys china Beijing 100190 Peoples R China Ctr Theoret Nucl Phys Natl Lab Heavy Ion Accelerator Lanzhou 730000 Peoples R China

The α-decay properties of well-deformed even-even nuclei are systematically calculated within the multichannel cluster model (MCCM). Instead of working in the WKB framework, the quasibound solution to the coupled Schro¨dinger equation is presented with outgoing wave boundary conditions, and the coupling potential is taken into full account in terms of the general quantum theories. The calculated α-decay half-lives are found to agree well with the experimental data with a mean factor of less than 2. The fine structure observed in α decay is also well reproduced by the four-channel microscopic calculation. Very strikingly, the MCCM can give relatively precise descriptions of the branching ratio to excited 4+ states, which is often overestimated in the usual WKB calculations. We expect it to be a significant development of theoretical models toward quantitative descriptions of α transitions to high-spin daughter states.

关键词： α decay half-lives cluster model coupled channel approach

Study on specific interaction of new ferrocene-substituted carborane conjugates with hemoglobin protein

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Science china Chemistry 2012年第4期55卷 594-603页

作者： WU ChunHui1,3, YE HongDe2. JIANG Hui1, WANG XueMei1 & YAN Hong2.1State Key Lab of Bioelectronics (Chien-Shiung Wu Lab), Southeast university, nanjing 2.0096,{2. 2.tate Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering, nanjing university, nanjing 2.0093,{2. 3School of Life Science and Technology, university of Electronic Science and Technology of{2., Chengdu 610054,{2. 1. State Key Lab of Bioelectronics (Chien-Shiung Wu Lab) Southeast University Nanjing 210096 China3. School of Life Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China2. State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China

The interactions between the new organometallic complexes, ferrocenesubstituted dithioocarborane conjugates （denoted as FcSB1, FcSB2.and FcSBCO） and hemoglobin （Hb） are investigated by electrochemistry, fluorescence and UVvis absorption spectroscopy. The results demonstrate that FcSB1, FcSB2.and FcSBCO can bind to the heme iron center through the replacement of the weakly bound H2./02.in the distal heme pocket of Hb by their sulfur donor atoms, inducing the allosteric change from the R state （oxygenated conformation, relax） to T state （deoxygenated conformation, tense）. The binding affinity is in the order of FcSBCO〉FeSB2.FeSB1. Moreover, the fluorescence study illustrates that the three ferrocenecarborane conjugates differently affect the quarterly and tertiary structures as well as the polarity in the surrounding of the Trp and Tyr residues in Hb. Typically, FcSB2.mainly induces alterations of the microenvironment around the 1337Trp residue which is located on the cql32.interface of Hb. Such distinct influences are attributed to the structural features of FcSB1, FcSB2.and FcSBCO containing hydrophobic ferrocenyl and carboranyl units as well as C=O group. Screening the proteinbinding behavior can signify the potential bioactivity of such molecules and may be helpful in the future development of promising multifunctional metallodrugs.

关键词： fluorescence – UV vis absorption spectroscopy – differential pulse voltammetry – biomolecular interaction – ferrocene substituted carborane conjugates – hemoglobin

Almandine megacrysts from Yingfengling Cenozoic basalt in Leizhou Peninsula and their parental magma origin

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Chinese Science Bulletin 2001年第14期46卷 1215-1219页

作者： YU Jinhai & S. Y. O’Reilly1. National Key Laboratory of Metallogenic Mechanism of Endogenetic Deposits, Department of Earth Sciences, nanjing university, nanjing 2.0093,{2. 2. National Key center of GEMOC, Department of Earth and Planetary Sciences, Macquarie university, North Ryde, NSW 2.09, Australia National Key Laboratory of Metallogenic Mechanism of Endogenetic Deposits Department of Earth Sciences Nanjing University Nanjing China National Key center of GEMOC Department of Earth and Planetary Sciences Macquarie University North Ryde Australia

The garnet megacrysts from Yingfengling basalts are characterlzed by high FeO (>2.%), CaO (7.02. -8.16%) and low MgO (5.88%-10.87%). Significant composition variations are observed in these megacrysts, of which Ni, V, Sc, Co, and HREE are positively correlated with their Mg# and Zr, Hf, Ga, Y, Sr, Nb, Zn and LREE-MREE are negatively correlated with Mg#. Megacryst parent magma is a highly evolved residual melt with strongl depletion in Ti, Sr, Hf, Nb and HREE. This parental magma was generated by more than 60% of crystallization fractionation of clinopyroxene, garnet, plagioclase and ilmenite from quartz tholeiitic magma. It has not erupted to the surface, but stayed at the upper mantle and formed the megacrystic cumulate. Megacrysts and their host basalt are in disequilibrium.

关键词： almandine megacryst geochemistry LAM-ICPMS Lei-zhou Peninsula.

P2. traffic optimization

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Science china(Information Sciences) 2012年第7期55卷 1475-1492页

作者： ZHANG GuoQiang 1,2.,TANG MingDong 3 ,CHENG SuQi 2.4 ,ZHANG GuoQing 2.,SONG HaiBin 5 ,CAO JiGuang 6 & YANG Jing 7 1 School of Computer Science and Technology,nanjing Normal university,nanjing 2.0046,china 2.Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100190,china 3 School of Computer Science and Engineering,Hunan university of Science and Technology,Xiangtan 4112.1,china 4 Graduate university of Chinese Academy of Sciences,Beijing 100190,china 5 nanjing R&D center,Huawei Technologies,nanjing 2.0012.china 6 china Academy of Telecommunication Research of MIIT,Beijing 100191,china 7 china Mobile Research Institute,Beijing 100053,china 1. School of Computer Science and Technology Nanjing Normal University Nanjing 210046 China2. Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China3. School of Computer Science and Engineering Hunan University of Science and Technology Xiangtan 411201 China4. Graduate University of Chinese Academy of Sciences Beijing 100190 China5. Nanjing R&D Center Huawei Technologies Nanjing 210012 China6. China Academy of Telecommunication Research of MIIT Beijing 100191 China7. China Mobile Research Institute Beijing 100053 China

Peer-to-peer (P2.) based content distribution systems have emerged as the main form for content distribution on the Internet,which can greatly reduce the distribution cost of content providers and improve the overall system ***,the mismatch between the overlay and underlay networks causes large volume of redundant traffic,which intensifies the tension between P2. content providers and ***,how to efficiently use network resources to reduce the traffic burden on the ISPs is crucial for the sustainable development of P2. *** paper surveys the state-of-art P2. traffic optimization technologies from three perspectives:P2. cache,locality-awareness and data *** details,comparison between these technologies and their applicabilities are presented,followed by a discussion of the issues that remain to be addressed and the direction of future content distribution research.

关键词： P2. traffic localization P2. traffic optimization P2. cache locality-awareness network coding content-centric network

Observational constraints on the early dark energy model

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Research in Astronomy and Astrophysics 2011年第7期11卷 751-758页

作者： Lei Feng Yu-Peng Yang Department of Physics Nanjing University Nanjing 210093 ChinaJoint Center for Particle Nuclear Physics and Cosmology Nanjing University - Purple MountainObservatory Nanjing 210093 China

Dark energy can be studied by its influence on the expansion of the *** investigate current constraints on early dark energy（EDE） achievable by the combined observational data from type Ia supernovae（557）,baryon acoustic oscillations,the current cosmic microwave background and the observed Hubble *** find that combining these data sets provides powerful constraints on early dark energy and the best fit values of the parameters in 68% and 95% confidence-level regions are：Ωm0=0.2.97 ＋0.0149＋0.02.7 -0.0138-0.0194,Ωe=0.012. ＋0.02.2.0.0381 -0.012.-0.012.,w0= -1.0415＋0.0891＋0.1182.-0.109-0.1604,and h=0.6988＋0.0059＋0.0083 -0.0058-0.0081.

关键词： cosmology—dark energy—cosmological parameters

Modification of Fluorgypsum as Cement Retarder

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Journal of Wuhan university of Technology(Materials Science) 2007年第4期22卷 745-748页

作者：王锦华 School of Materials Science and Engineering Wuhan University of Technology

The chemical composition and mineral structure of fluorgypsum as well as its harm to application in cement were elaborately analyzed. The primary fluorgypsum was modified and its applications in cement＇s production were studied. The technological flow chart of preparing modified fluorgypsum was given. Experimental results indicate that hydration ratio the modified fluorgypsum through adding compound additive for 14d is about 70%. The modified fluorgypsum as cement retarder has certain stimulation to fly ash and increases the strength of compound cement. In addition, its adding amount is lower than that of natural gypsum. The modified fluorgypsum is a good substitute for natural gypsum.

关键词： fluorgypsum industry waste modification cement retarder

Global view of Hopf bifurcations of a van der Pol oscillator with delayed state feedback

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Science china(Technological Sciences) 2010年第3期53卷 595-607页

作者： ZHANG Li1,WANG HuaiLei1 & HU HaiYan1,2.1 MOE Key Lab of Mechanics and Control of Aerospace Structures,nanjing university of Aeronautics and Astronautics,nanjing 2.0016,china 2.School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,china 1. MOE Key Lab of Mechanics and Control of Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 China2. School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China

This paper presents both analytical and numerical studies on the global view of Hopf bifurcations of a van der Pol oscillator with delayed state *** on a detailed analysis of the stability switches of the trivial equilibrium of the system,the stability charts are given in a parameter space consisting of the time delay and the feedback *** center manifold reduc-tion and the normal form method are used to study Hopf bifurcations with respect to the time *** gain an insight into the persistence of a Hopf bifurcation as the time delay varies farther away from its critical value,the method of multiple scales is used to obtain the global view of Hopf bifurcations with respect to the time *** the analytical results of Hopf bifurca-tions and global view of those bifurcations are validated via a collocation scheme implemented on *** most important discovery in this paper is the well-structured global view of Hopf bifurcations for the system of concern,showing the generality of the persistence of Hopf bifurcations.

关键词： Hopf bifurcation global view center manifold reduction method of multiple scales collocation scheme

Preparation of Compound Ultrafine CeO2.by Wet-Solid-Phase Mechanochemical Modification

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Journal of Rare Earths 2004年第Z1期22卷 42-45页

作者： Gu Ziyin Chen Weifan（china National Special Superfine Powder Engineering Research center,{2. of Science & Technology, nanjing 10094, china） Hu Pinggui Li Yongxiu Engineering Research center for Rare Earth Nanchang UniversityNanchang 330047 China 　　 Engineering Research Center for Rare Earth Nanchang UniversityNanchang 330047 China Engineering Research Center for Rare Earth Nanchang UniversityNanchang 330047 China

To satisfy practical requirements from industrial applications, an alternate route for synthesis compound ultrafine CeO2.powders by wet-solid-phase mechanochemical modification using industrial grade hydrated cerium carbonate as raw material was *** effect of modifier reaction percentage, reaction time, calcining temperature and modifier amount on particle size, density, suspensibility, and hardness of compound CeO2.powder was *** phase evolutions of preparation process were characterized by *** micrograph of the final product shows that compound CeO2.powders obtained are well-dispersed, spherically-shaped, uniformly-sized and submicron-sized *** method is readily available in raw material, low in cost, simple in process, and has great potential for *** compound CeO2.powders of different physical properties can be synthesized by controlling the above-mentioned influence factors in preparation process.

关键词： ultrafine compound CeO2 powder mechanochemical modification preparation rare earths