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A primarily study on size distribution of polycyclic aromatic hydrocarbons （PAHs） in atmospheric aerosol during foggy days in the suburban area of nanjing

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A primarily study on size distribution of polycyclic aromati...

第五届海峡两岸气溶胶技术研讨会

作者： HUANG Hongli~(a,c) FAN Shu-xian~(a,b) TANG Lili~c YANG Xuezhen~c LI Hongshuang~c (a Jiangsu Key Laboratory of Meteorological Disaster(nanjing university of information science and technology) nanjing 2.0044,P.R.china )(b LAPC,Institute of Atmospheric physics,Chinese Academy of sciences,Beijing 100029,china )(c college of Environmental science and Engineering,nanjing university of information science and technology,nanjing 2.0044,china)

＜正＞The purpoea of this study was to characterize size distributions of 16 polycyclic aromatic hydrocarbons （PA Hs） in the suburban area of nanjing in foggy days Size distribution aerosol samples collected in foggy and fine days have been analyzed by gas chromatography with mass selective detection （GC-MS）.The content of inhalable partides could be reduced by fog,especially at the particle diameter larger than 4.7um could be wiped off *** are two peeks at size diameter 0.65-1.1 and 3.3-4.7um in foggy days,indicating that size distributions of PM were both bi-modal with a peek in the fine partide size and the other peek in the coarsa particle *** nighttime of both sampling weather,PAHs were predominated in fine particles（Dp＜2.1 um）.On the other hand,Fog reduced the concentration of PAHs in coarse particles（Dp＞2.1 um） in nighttime.

关键词： Fog Atmospheric aerosol PAHs Size distribution

A generalized Weyl-Wigner quantization scheme unifying P-Q and Q-P ordering and Weyl ordering of operators

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Chinese physics B 2012年第6期21卷 207-212页

作者：王继锁范洪义孟祥国 Shandong Provincial Key Laboratory of Laser Polarization and information technology College of Physics and EngineeringQufu Normal University Department of physics Liaocheng University Department of physics Shanghai Jiao Tong University

By extending the usual Wigner operator to the s-parameterized one as 1/4π2 integral （dyduexp [iu（q-Q）＋iy（p-P）＋is/2yu]） from n=- ∞ to ∞ with s beng a,real parameter,we propose a generalized Weyl quantization scheme which accompanies a new generalized s-parameterized ordering *** rule recovers P-Q ordering,Q-P ordering,and Weyl ordering of operators in s = 1,1,0 *** it differs from the Cahill-Glaubers’ ordering rule which unifies normal ordering,antinormal ordering,and Weyl *** also show that in this scheme the s-parameter plays the role of correlation between two quadratures Q and *** formula that can rearrange a given operator into its new s-parameterized ordering is presented.

关键词： generalized Wigner operator generalized operator ordering rule bivariate normal dis-tribution

Structure and dynamical interaction in protein studied by neutron scattering

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Structure and dynamical interaction in protein studied by ne...

第三届散裂中子源多学科应用研讨会

作者： Bin Kang, Zhi-yong Wei, Da Chen Medical physics Center, college of Materials science and technology, nanjing university of Aeronautics and Astronautics, 210016, nanjing, china

＜正＞Neutron scattering is a powerful tool to study the structure functions and interaction in biological macromolecules such as protein. Low energy neutrons can induce elastic, quasielastic and inelastic scatterings in the protein. From measuring the scattering intensity function versus energy transfers, form factor and structure factor, we can get the structure and dynamical information in protein such as geometric size, shape, volume,

关键词： neutron scattering intensity function protein structure molecular dynamics

Modified extremal optimization for the hard maximum satisfiability problem

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Journal of Zhejiang university-science C(Computers and Electronics) 2011年第7期12卷 589-596页

作者： Guo-qiang ZENG 1,Yong-zai LU 2,Wei-Jie MAO 2 (1 college of physics & Electronic information Engineering,Wenzhou university,Wenzhou 325035,china) (2 State Key Laboratory of Industrial Control technology,Institute of Cyber-Systems and Control,Zhejiang university,Hangzhou 310027,china) college of physics & Electronic information Engineering Wenzhou University State Key Laboratory of Industrial Control technology Institute of Cyber-Systems and Control Zhejiang University

Based on our recent study on probability distributions for evolution in extremal optimization (EO),we propose a modified framework called EOSAT to approximate ground states of the hard maximum satisfiability (MAXSAT) problem,a generalized version of the satisfiability (SAT) *** basic idea behind EOSAT is to generalize the evolutionary probability distribution in the Bose-Einstein-EO (BE-EO) algorithm,competing with other popular algorithms such as simulated annealing and *** results on the hard MAXSAT instances from SATLIB show that the modified algorithms are superior to the original BE-EO algorithm.

关键词： Extremal optimization (EO) Evolution Probability distributions Maximum satisfiability (MAXSAT) problem

EXISTENCE OF POSITIVE ENTIRE SOLUTIONS FOR QUASILINEAR ELLIPTIC SYSTEMS

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Annals of Differential Equations 2002年第4期18卷 417-424页

作者：杨作东杨会生 college of math and Computer Sciences Nanjing Normal University Nanjing 210097

In this paper, the existence of positive solutions for a class of quasilinear elliptic differential equation systems are established by Schauder-TychonofF fixed point theorem.

关键词： quasilinear elliptic system existence positive entire solutions the Schauder-Tychonoff fixed point theorem

Influence of oxygen gas content on the structural and optical properties of ZnO thin films deposited by RF magnetron sputtering at room temperature

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Rare Metals 2011年第2期30卷 170-174页

作者： LIU Baoting ZHOU Yang ZHENG Hongfang LI Mana GUO Zhe HAO Qingxun PENG Yingcai college of physics science and technology Hebei University Baoding 071002 China Baoding university Baoding 071000 China college of Electronic and information Engineering Hebei University Baoding 071002 China

Zinc oxide （ZnO） thin films were deposited on sapphire （0001） substrates at room temperature by radiofrequency （RF） magnetron sputtering at oxygen gas contents of 0%, 25%, 50% and 75%, respectively. The influence of oxygen gas content on the structural and optical properties of ZnO thin films was studied by a surface profile measuring system, X-ray diffraction analysis, atomic force microscopy, and UV spectro- photometry. It is found that the size of ZnO crystalline grains increases first and then decreases with the increase of oxygen gas content, and the maximum grain size locates at the 25% oxygen gas content. The crystalline quality and average optical transmittance （〉90%） in the visi- ble-light region of the ZnO film prepared at an oxygen gas content of 25% are better than those of ZnO films at the other contents. The obtained results can be attributed to the resputtefing by energetic oxygen anions in the growing process.

关键词： thin films zinc oxide magnetron sputtering oxygen structural properties optical properties

Dependence of magnetic field just inside the magnetopause on subsolar standoff distance:global MHD results

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Dependence of magnetic field just inside the magnetopause on...

第十四届全国日地空间物理学术研讨会

作者： Wang Ming1,2 Lu JianYong1,2 Liu ZiQian3 Pei ShiXin1 (1 college of math & physics, nanjing university of information science & technology, nanjing 2.0044, china ) (2 National Center for Space Weather, china Meteorology Administration, Beijing 100081, china ) (3 Chinese Academy of Meteorological science, Graduate university of Chinese Academy of science, Beijing 100081, china )

The subsolar magnetopause is the boundary of solar wind and the Earth’s magnetosphere where reduced solar wind dynamic pressure is equal to the magnetic pressure of the Earth’s outer magnetosphere. We use a global MHD model to estimate the ratio （f） of the compressed magnetic field just inside the subsolar magnetopause to the purely dipolar magnetic field. We also compared our numerical results with a similar work by Shue with the THEMIS data. Our results show that the ratio f is linearly proportional to the subsolar magnetopause standoff distance （r0） for both northward and southward interplanetary magnetic field, which in property is consistent with Shue’s result but the proportionality constant is smaller, although previous theoretical studies show that the ratio f is nearly independent of the subsolar standoff distance. The global model results also show that the ratio f is smaller for the southward IMF under the same r0 and the proportionality constant for the southward IMF is larger than that for the northward IMF. Both conclusions agree with statistical results from observations by Shue.

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Collective Rotational Bands in Transfermium Nuclei

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Collective Rotational Bands in Transfermium Nuclei

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： Xiao-tao He~(1 1)) Zhong-zhou Ren~2 Shu-xin Liu~3 En-guang Zhao~4 Jin-yan Zeng~3 1(college of Material science and technology,nanjing university of Aeronautics and Astronautics,nanjing 210016,china) 2(Department of physics,nanjing university,nanjing 210093,china) 3(School of physics,Peking university,Beijing 100871,china) 4(Institute of Theoretical physics,Chinese Academy of sciences,Beijing 100080,china)

Rotational bands in even-even nuclei Fm,No,No and odd-A nuclei No, Md are studied by the cranked shell model with particle-number conserving treatment for monopole and quadrupole pairing *** bands are reproduced very well by theoretical results.A backbending of kinematic moment of inertia（?） is predicted at（?）≈0.275,0.300 MeV,0.275 MeV in bands of No,No and No,*** detailed information about the contribution to alignment from each cranked single particle level exhibits that the backbendings in No,No are mainly due to the rapidly aligned angular momentum of proton 1j[770]1/2 pairs and neutron 2h[761]3/2,1j[734]9/2 pairs the band crossing,and that in No is attributed to the simultaneous alignment of neutron 2h（1/2[761]） and proton 1j（1/2[770]） *** one signature band was observed in *** predict its signature partner band with a sharp backbending at very low frequency of（?）w≈0.15 *** of（?） in Md are the consequence of crossing between the proton 1/2[521]and 1/2[770]*** sudden rise of（?） is mainly due to the large alignment of proton 1/2[770]pair.

关键词： High-j intruder orbital Transfermium nuclei Backbending Cranked shell model Moment of inertia

Influence of modulation ratio on structure and properties of nanoscale ZrB_2/ZrAlN multilayered coatings

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science china(Technological sciences) 2010年第3期53卷 772-775页

作者： LI DeJun 1,KANG YuanBin 1,DONG Lei 1,DENG XiangYun 1,LIU Hao 2 &SUN XueLiang 2 1college of physics and Electronic information science,Tianjin Normal university,Tianjin 300387,china 2 Department of Mechanical&Materials Engineering,university of Western Ontario,London ON,Canada 1. college of physics and Electronic information science Tianjin Normal University Tianjin 300387 China2. Department of Mechanical & Materials Engineering University of Western Ontario London ON Canada

ZrB2/ZrAlN multilayered coatings with various modulation ratios(t ZrB2:t ZrAlN)and constant modulation periods were prepared by magnetron sputtering system at room ***,XRD,surface profiler and nano-indenter were employed to investigate the influences of tZ rB 2:tZrAlNon the microstructure and mechanical properties of the *** interfaces and nanoscale multilayered modulation were confirmed by *** multilayer with modulation period of 40 nm and ratio of 3:1 displayed the highest hardness(36.4 GPa)and critical fracture load(76.477 mN)with lower *** polycrystalline structure and multilayered modulate structure were directly responsible for the enhanced mechanical properties.

关键词： ZrB2/ZrAlN multilayered coating magnetron sputtering modulation ratio nanoscale