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Multi-carbazole derivatives for two-photon absorption data storage:Synthesis,optical properties and theoretical calculation

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Science china Chemistry 2010年第4期53卷 884-890页

作者： LI Lin1, YANG JiaXiang1,2, WANG CaiXia1, HU ZhangJun1, TIAN YuPeng1,2, LI Jing3. WANG ChuanKui3. LI Ming4, CHENG GuangHua4, TANG HuoHong5, HUANG WenHao5, TAO XuTang2 & JIANG MinHua2 1Department of Chemistry, Anhui University, Hefei 23.03., china 2State Key Laboratory of Crystal Materials, Institute of Crystal Materials of Shandong University, Jinan 250100, china 3.epartment of physics, Shandong Normal University, Jinan 250014, china 4State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, china 5Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of china, Hefei 23.026, china 1. Department of Chemistry Anhui University Hefei 230039 China2. State Key Laboratory of Crystal Materials Institute of Crystal Materials of Shandong University Jinan 250100 China3. Department of Physics Shandong Normal University Jinan 250014 China4. State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi’an 710119 China5. Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei 230026 China

Two novel quadrupolar organic compounds, 3.(4-((E)-2-(9-butyl-9H-carbazol-6-yl) vinyl)styryl)-9-propyl-9H-carbazole (BCSPC) and 3.(3.(3.((1E)-2-(4-((E)-2-(3.(3.5-bis(9-butyl-9H-carbazol-6-yl)phenyl)-9-butyl-9H-carbazol-6-yl)vinyl)phenyl) vinyl)-9-butyl-9H-carbazol-6-yl)-5-(9-butyl-9H-carbazol-6-yl)phenyl)-9-butyl-9H-carbazole (BCPBC), with different conjugated arms, have been designed and synthesized. Their one-and two-photon absorption (TPA) and excited fluorescence properties have been experimentally investigated. The two-photon absorption cross-sections of two compounds were estimated by two-photon excited fluorescence technique using 200 fs, 76 MHz, Ti:sapphire laser, which are 22 and 154 GM for BCSPC and BCPBC, respectively. The optimal excitation wavelengths are 780 nm for both BCSPC and BCPBC. A data recording experiment proved the potential application of the materials.

关键词： initiator optical data storage fluorescence two-photon absorption theoretical calculation

Challenges in the theoretical investigations of lipid membrane configurations

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Chinese physics B 2013年第2期22卷 36-44页

作者：涂展春 Department of physics Beijing Normal University Kavli Institute for theoretical physics china Chinese Academy of Sciences

We report some key results in the theoretical investigations of configurations of lipid membranes and present several challenges in this field,which involve（i）the exact solutions to the shape equation of lipid vesicles,（ii）the exact solutions to the governing equations of open lipid membranes,（iii）the neck condition of two-phase vesicles in the budding state,（iv） the nonlocal theory of membrane elasticity,and（v）the relationship between the symmetry and the magnitude of the free energy.

关键词： configuration lipid membrane

A possible proton pygmy resonance in ^(17)Ne

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 49-52页

作者： MA ZhongYu1,2 & TIAN Yuan1 1 china Institute of Atomic Energy, Beijing 102413. china 2 Center of theoretical Nuclear {3., National Laboratory of Heavy Collision, Lanzhou 73.000, china 1. china Institute of Atomic Energy Beijing 102413 China2. Center of Theoretical Nuclear Physics National Laboratory of Heavy Collision Lanzhou 730000 China

The low-lying electric dipole strengths in proton-rich nuclei 17F and 17Ne, which can be produced at HIRFL-CSR in Lanzhou, are investigated. In the framework of the covariant density functional theory the self-consistent relativistic Hartree Bogoliubov model and the relativistic quasiparticle random phase approximation with the NL3.parameter set and Gogny pairing interaction are adopted in the calculations. A pronounced dipole peak appears below 10 MeV in17Ne, but does not occur in 17F. The prop erties of this low-lying E1 excitation in 17Ne are studied, which may correspond to a proton pygmy resonance with different characteristics from those of giant dipole resonance.

关键词： proton pygmy resonance relativistic Hartree-Bogoliubov model relativistic quasiparticle random phase approximation

Genetic and logic networks with the signal-inhibitor-activator structure are dynamically robust

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Progress in Natural Science:Materials International 2006年第12期16卷 1329-1336页

作者： LI Fangting** and TAN Ning(School of physics and Centre for theoretical Biology, Peking University, Beijing 100871, china) [a]School of physics and Centre for Theoritical Biology Peking University Beijing China

The proteins, DNA and RNA interaction networks govern various biological functions in living cells, these networks should be dynamically robust in the intracellular and environmental fluctuations. Here, we use Boolean network to study the robust structure of both genetic and logic networks. First, SOS network in bacteria E. coli, which regulates cell survival and repair after DNA damage, is shown to be dynamically robust. Comparing with cell cycle network in budding yeast and flagella network in E. coli, we find the signal-inhibitor-activator (SIA) structure in transcription regulatory networks. Second, under the dynamical rule that inhibition is much stronger than activation, we have searched 3.node non-self-loop logical networks that are dynamically robust, and that if the attractive basin of a final attractor is as large as seven, and the final attractor has only one active node, then the active node acts as inhibitor, and the SIA and signal-inhibitor (SI) structures are fundamental architectures of robust networks. SIA and SI networks with dynamic robustness against environment uncertainties may be selected and maintained over the course of evolution, rather than blind trial-error testing and being an accidental consequence of particular evolutionary history. SIA network can perform a more complex process than SI network, and SIA might be used to design robust artificial genetic network. Our results provide dynamical support for why the inhibitors and SIA/SI structures are frequently employed in cellular regulatory networks.

关键词： genetic network signal-inhibitor-activator (SIA) structure Boolean network model dynamical robust.

Systematic Study of Stability of Super Heavy Nuclei

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Communications in theoretical physics 2004年第12期 871-874页

作者： ZHANG Hong-Fei,~(1,4) ZUO Wei,~(1,2,3. Soojae Im,~(1,2) ZHOU Xiao-Hong,~1 LI Jun-Qing~(1,2,3.~1Institute of Modern physics,the Chinese Academy of Sciences,Lanzhou 73.000,china~2Center of theoretical Nuclear physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 73.000,china~3.nstitut f(?)r Theoretische Physik,Justus-Liebig-Universit(?)t,Heinrich-Buff-Ring 16,D 3.3.2 Giessen,Germany~4Graduate School of the Chinese Academy of Sciences,Beijing 10003.,china

A systematic overview on the characteristics of super heavy nuclei from Z=101 to Z=13. based on thedata by P.M(?)ller et *** *** nuclei which have the biggest mean binding energy in each of their isotopechain show systematic regular behavior,indicating that the mean binding energy is a good criterion to classify superheavy nuclei by their *** investigation on the nuclear data at and after Z=127 has been suggested.

关键词： superheavy nucles binding energy stability

Systematic Study of Survival Probability of Excited Superheavy Nucleus

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Systematic Study of Survival Probability of Excited Superhea...

Digitalization decoupling method and its application to the phased array in MRI

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Xia ChengJun~(1 1)) Zhou Shangui~(1,3.2)) Sun Baoxi~(1 3.) Zhao Enguang~(1.3.4)) 1(Mathematical and Physical Sciences Department,Beijing University of Technology,Beijing 100124,china ) 2(Institute of theoretical physics,Chinese Academy of Sciences,Beijing 100080,china ) 3.Center of theoretical Nuclear physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 73.000,china)

theoretical estimates for the survival probability in 1n-channel of about 1845 excited isotopes of superheavy elements with 100≤Z≤13. are made using statistical *** nuclear characteristics predicted in finite-range droplet macroscopic model are used *** our calculation it turns out that the stability island is still valid at the optimum excitation energy,but nucleus in neutron-rich area also possess higher survival probability due to the lower neutron separation *** sensitivity of the survival probability on nuclear properties is also discussed.

关键词： survival probablity superheavy elements Fermi-gas model stability island

来源： cnki会议评论

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Progress in Natural Science:Materials International 2003年第9期 45-51页

作者： SONG Xiaoyu, WANG Weidong, ZHANG Bida, LEI Ming and BAO Shanglian (1. Institute of Heavy Ion physics, the Beijing Key Laboratory of Medical physics & Engineering, Peking University, Beijing 100871, china 2. The General Hospital of PLA, Beijing 100853. china 3. Institute of 503. Spaceflight Scientific Group Company, Beijing 100086, china) Institute of Heavy Ion physics，the Beijing Key Laboratory of Medical physics & Engineering，Peking University，Beijing 100871，china Institute of Heavy Ion physics，the Beijing Key Laboratory of Medical physics & Engineering，Peking University，Beijing 100871，china The General Hospital of PLA，Beijing 100853.china Institute of 503.Spaceflight Scientific Group Company，Beijing 100086，china

A general network decoupling method for phased array radio frequency coil used in magnetic resonance imaging is devel-oped. A more flexible digital approach further simplifies the method, which has an even higher signal-to-noise ratio. The performance ofthe digitalized decoupling method was confirmed by the calculated result by using a high frequency structure simulation software with themethod of finite element for a tree-port phased array RF coil. The consistence was well established between the theoretical and simulatedresults.

关键词： MRI phased array coil decoupling digitalization.

The anharmonic effect study of coupled Morse oscillators for the unimolecular reaction

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Science china Chemistry 2008年第12期51卷 1146-1152页

作者： YAO Li1,2 & LIN Sheng-Hsien2,3. Department of physics, Dalian Maritime University, Dalian 116026, china 2 Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10764, china 3.Department of Applied Chemistry and Institute of Molecular Sciences, Chiao-Tung University, Hsinchu 3.051, Taiwan, china 1. Department of physics Dalian Maritime University Dalian 116026 China 2. Institute of Atomic and Molecular Sciences Academia Sinica Taipei 10764 China 3. Department of Applied Chemistry and Institute of Molecular Sciences Chiao-Tung University Hsinchu 30051 Taiwan China

The importance of anharmonic effect in dissociation of molecular systems especially clusters has been noted. In this paper, we shall study the effect of coupled anharmonic oscillator of the standard bilinear form (SBF) Morse oscillator (MO) potential on unimolecular reaction. We shall use the systematic theoretical approach, YL method, proposed by Yao and Lin (YAO L, et. al. J Phys Chem A, 2007, 111(29): 6722-6729), which can evaluate anharmonic effects on the rate constants based on the transition state theory. In treating the anharmonic effect with the Morse oscillator potential on unimolecular reactions under collision-free conditions by using the RRKM (Rice-Ramsperger-Kassel-Marcus) theory, the in-verse Laplace transformation of the partition functions was used to obtain the total amount of state and density of state by using the first-order and the second-order approximations of the saddle-point method. To demonstrate the anharmonic effect of the SBF Morse model, we choose some model systems and a real reaction as examples.

关键词： anharmonic effect standard bilinear form Morse oscillator rate constant RRKM theory

An Extended Subequation Rational Expansion Method and Solutions of (2+1)-Dimensional Cubic Nonlinear Schr(?)dinger Equation

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Communications in theoretical physics 2007年第12期48卷 987-992页

作者： GUO Wei-Ming~1 LI Biao~(1,3.and CHEN Yong~(1,2,3.~1 Nonlinear Science Center and Department of Mathematics,Ningbo University,Ningbo 3.5211,china~2 Institute of theoretical Computing,East china Normal University,Shanghai 200062,china~3.Key Laboratory of Mathematics Mechanization,the Chinese Academy of Sciences,Beijing 100080,china Nonlinear Science Center and Department of Mathematics Ningbo University Ningbo 315211 China Key Laboratory of Mathematics Mechanization the Chinese Academy of Sciences Beijing 100080 China Institute of theoretical Computing East China Normal University Shanghai 200062 China

An extended subequation rational expansion method is presented and used to construct some exact,analyt-ical solutions of the (2+1)-dimensional cubic nonlinear Schrdinger *** our results,many known solutionsof the (2+1)-dimensional cubic nonlinear Schrdinger equation can be recovered by means of some suitable selections ofthe arbitrary functions and arbitrary *** computer simulation,the properties of new non-travelling waveand coefficient function's soliton-like solutions,and elliptic solutions are demonstrated by some plots.

关键词： (2+1)-d cubic nonlinear Schrdinger equation soliton solution elliptic function soltuions