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Photoluminescence Characterization of NASICON Material

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稀有金属材料与工程 2006年第S3期 535-537页

作者： Yuehua He~1 Baofu Quan~1 Ying Wang~2.Chuanhui Cheng~1 Fengmin Liu~1 Biao Wang (1.College of Electronic Science and Engineering,Jilin university,Changchun 130012.china) (2.School of Materials Science and Engineering,Dalian {2. university,Dalian 11602.,china)

Besides gas sensitivity,NASICON （Na super ion conductor） material has luminescence *** this paper,the photoluminescence properties of NASICON and doped-NASICON material are *** NASICON material was synthesized by conventional sol-gel process,and doped with Er2.3,Tm2.3,Dy2.3,CsCl by 1%,3%,5% （mass ratio）,*** ultraviolet light （32. nm,He-Cd laser） excited luminescent emissions of the resulted powders are recorded *** in the 330 nm to 650 nm *** main peak of the pure NASICON is found at the wavelength of 474 nm （blue light）,the transition energy is 2.616 *** luminescent intensity is weakened obviously after doping with Er2.3and Tm2.3,but is increased after doping with Dy2.3and 3% CsCl.

关键词： photoluminescence NASICON luminescent intensity wavelength

Application of singular perturbation method in analyzing traffic density waves

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Journal of Shanghai university(English Edition) 2009年第1期13卷 6-11页

作者：沈飞英葛红霞雷丽 Faculty of Science Ningbo University School of Energy and Power Engineering Shandong University

Car following model is one of microscopic models for describing traffic flow. Through linear stability analysis, the neutral stability lines and the critical points are obtained for the different types of car following models and two modified models. The singular perturbation method has been used to derive various nonlinear wave equations, such as the Kortewegde-Vries （KdV） equation and the modified Korteweg-de-Vries （mKdV） equation, which could describe different density waves occurring in traffic flows under certain conditions. These density waves are mainly employed to depict the formation of traffic jams in the congested traffic flow. The general soliton solutions are given for the different types of car following models, and the results have been used to the modified models efficiently.

关键词： traffic flow singular perturbation method car following models Korteweg-de-Vries (KdV) equations modified Korteweg-de-Vries (mKdV) equations

GPS/SPL组合伪距测量的精度因子仿真研究

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系统仿真学报 2008年第18期20卷 4975-4977,4981页

作者：甘兴利袁赣南哈尔滨工程大学自动化学院

针对舰载飞机在降落过程中对高精度和高稳定性导航系统的需求,提出了一种舰载伪卫星(SPL)增强GPS导航的技术方案。通过和机载伪卫星方案的对比,分析舰载伪卫星的优越性和可行性。证明了增加舰载伪卫星可以减小几何精度因子GDOP值和降低... 详细信息

针对舰载飞机在降落过程中对高精度和高稳定性导航系统的需求,提出了一种舰载伪卫星(SPL)增强GPS导航的技术方案。通过和机载伪卫星方案的对比,分析舰载伪卫星的优越性和可行性。证明了增加舰载伪卫星可以减小几何精度因子GDOP值和降低用户接收机选星的难度,把选星方法由计算四颗GPS卫星的投影四面体体积最大,简化为计算三颗GPS星的投影三角形面积最大。并通过Matlab仿真定量地分析了增强前后的伪距测量的各种精度因子的变化趋势,在GPS高度角在10o和70o之间和伪卫星的高度角在-10o和-90o之间时,GPS/SPL组合导航系统具有最优性能。

关键词： GPS 伪卫星精度因子伪距测量

Low-frequency variability of the North Equatorial Current bifurcation in the past 40 years from SODA

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Acta oceanologica Sinica 2011年第3期30卷 14-19页

作者： MENG Qingji WANG Fan LIU Na Key Laboratory of ocean Circulation and Waves （KLOCAW） Chinese Academy of Sciences Qingdao 266071 China Graduate School of Chinese Academy of Sciences Beijing 100039 China National Marine Environmental Forecasting Center Beijing 100081 China

The low-frequency variability of the North Equatorial Current （NEC） bifurcation during 1958 to 2.01 was investigated with the Simple ocean Data Assimilation （SODA） 2.0.2.dataset. In agreement with recent observations, the NEC bifurcation latitude （NBL） shifted northward as depth increases, from about 12.7°N near the surface to about 17.1°N at depths around 500 m for the annual average. This study reveals that the interannual variations of NBL, with five years period, mainly focused on the upper 500 m with amplitude increasing as depth increased. The NBL shifted southward in the past 40 years, which was more significant in the subsurface at more than -0.02./a. The NBL manifests itself in the transports of NMK （NEC-Mindanao Current （MC）-Kuroshio） system in strong relationship with MC （0.7） and Kuroshio （-0.7）. The EOF analysis of meridional velocity off the Philippine coast shows that the first mode, explaining 62. of variance and 5 years period, was highly correlated with the southward shift of NBL with coefficient at about 0.75. The southward shift of NBL consists with the weakening of MC and strengthening of Kuroshio, which exhibited linear trends at -0.2.Sv/a and 0.11Sv/a. Both interannual variation and trend of NBL were closely related to the variation of NMK system.

关键词： North Equatorial Current bifurcation latitude interannual variation linear trend NEC-Mindanao Current-Kuroshio system

Characterization and expression of a cDNA, AmphiSDHD , encoding the amphioxus cytochrome b small subunit in mitochondrial succinate ubiquinone oxidoreductase

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Progress in Natural Science:Materials International 2005年第4期 28-32页

作者： MA Lifang 1, ZHANG Shicui 1*, ZHUANG Zhimeng 2. LIU Zhenhui 1, LI Hongyan 1 and XIA Jianjun 1(1. Department of Marine Biology, ocean Universiy of china, Qingdao 2.6003, china 2. Yellow Sea Fishery Research Institute, Qingdao 2.6071, china) Department of Marine Biology Ocean Universiy of China Qingdao 266003 China Yellow Sea Fishery Research Institute Qingdao 266071 China

In this study, an amphioxus cDNA, AmphiSDHD , encoding the cytochrome b small subunit in mitochondrial succinate ubiquinone oxidoreductase, was isolated from the gut cDNA library of amphioxus Branchiostoma belcheri tsingtauense. It is 142. bp in length, with an open reading frame of 465 bp coding for a protein of 154 amino acids. The deduced protein contains a mitochondrial targeting presequence of 65 amino acids rich in basic residues like arginine and hydroxy residues such as serine and threonine. Alignment of the amino acid sequences of AmphiSDHD and other eukaryotic SDHD proteins showed that AmphiSDHD has three transmembrane segments, and includes two histidine residues in the second transmembrane segment that are the putative binding sites for the heme b molecule. The phylogenetic tree constructed suggests that AmphiSDHD appears more closely related to vertebrate SDHD proteins than invertebrate ones. Northern blotting demonstrated that AmphiSDHD is ubiquitously expressed in amphioxus, being in line with the fact that SDHD is a house keeping protein.

关键词： amphioxus Branchiostoma SDHD CII-4 complex II.

Theoretical studies on Ru(fppz)_2.CO)L (L=N-heterocyclic ligand):Electronic structure,absorption,phosphorescence,and solvatochromism

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Science china Chemistry 2008年第12期51卷 1211-1220页

作者： LIU Tao1, ZHOU Xin1, BAI FuQuan1, ZHANG JianPo1, XIA BaoHui1,2. PAN QingJiang3 & ZHANG HongXing1 1 State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin university, Changchun 13002., china 2.College of Chemistry, Jilin university, Changchun 13002., china 3 Laboratory of Physical Chemistry, School of Chemistry and Materials Science, Heilongjiang university, Harbin 150080, china State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130023 China College of Chemistry Jilin University Changchun 130023 China Laboratory of Physical Chemistry School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China

A series of ruthenium(II) complexes Ru(fppz)2.CO)L [fppz = 3-trifluoromethyl-5(2.pyridyl)pyrazole; L = pyridine (1), 4-dimethylaminopyridine (2., 4-cyanopyridine (3)] were designed and investigated theo-retically to explore their electronic structures, absorption, and emissions as well as the solvatochrom-ism. The singlet ground state and triplet excited state geometries were fully optimized at the B3LYP/LANL2.Z and CIS/LANL2.Z level, respectively. The HOMO of 1-3 is composed of dyz(Ru) atom and π(fppz). The LUMO of 1 and 2.is dominantly contributed by π*(fppz) orbital, but that of 3 is con-tributed by π*(L). Absorption and phosphorescence in vacuo, C6H12. and CH3CN media were calculated using the TD-DFT level of theory with the PCM model based on the optimized ground and excited state geometries, respectively. The lowest-lying absorption of 1 and 2.at 387 and 391 nm is attributed to {[dyz(Ru) + π(fppz)] → [π*(fppz)]} transition, but that of 3 at 479 nm is assigned to {[dyz(Ru) + π(fppz)] → [π*(L)]} transition. The phosphorescence of 1 and 2.at 436 and 438 nm originates from 3{[dyz(Ru) + π(fppz)] [π*(fppz)]} excited state, while that of 3 at 606 nm is from 3{[dyz(Ru) + π(fppz)] [π*(L)]} excited state. The calculation results showed that the absorption and emission transition character can be changed from MLCT/ILCT to MLCT/LLCT transition by altering the substituent on the L ligand. The phosphorescence of 1 and 2.does not have solvatochromism, but that of 3 at 606 nm (vacuo), 584 nm (C6H12., and 541 nm (CH3CN) is strongly dependent on the solvent polarity, so introducing elec-tron-withdrawing group on ligand L will induce remarkable solvatochromism.

关键词： ruthenium complex DFT phosphorescence solvatochromism

SENSITIVITY STUDY OF THE EFFECTS OF WAVE-INDUCED VERTICAL MIXING ON VERTICAL EXCHANGE PROCESSES

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Journal of Hydrodynamics 2010年第3期22卷 410-418页

作者： LIANG Bing-chen LEE Dong-yong LI Hua-jun ZHANG Jing Key Laboratory of ocean Engineering Shandong Province Ocean University of China Qingdao 266100 China Coastal and Harbour Engineering Research Center Korea Ocean Research and Development Institute AnsanKorea College of Engineering Ocean University of China Qingdao 266100 China

The hydrodynamic model COHERENS-SED, developed by the present authors through introducing wave-enhanced bottom stress, wave dependent surface drag coefficient, wave-induced surface mixing, SWAN to COHERENS, is modified to account for wave-induced vertical mixing. The COHERENS-SED model can also be used for one-dimensional, two-dimensional, three-dimensional current and salinity calculations. One-dimensional model and three-dimensional model are used to study the effects of the wave-induced vertical mixing. The horizontal current velocity profiles obtained by the model are in good agreement with the analytical velocity profiles under the same input conditions. Numerical results show that higher wave height would generally generate larger vertical eddy viscosity and lower horizontal velocity. The results for fresh water in Yellow river Delta show that the wave-induced vertical mixing increases the momentum of fresh water transferring ability downwards to seabed and salt water＇s mixing with upper fresh water. Fresh water flume length is compressed considerably.

关键词： Yellow river Delta COHERENS SWAN COHERENS-SED wave-induced vertical mixing

Phylogenetic diversity of TypeⅠpolyketide synthase genes from sediments of Ardley Island in Antarctica

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Acta oceanologica Sinica 2011年第6期30卷 104-111页

作者： ZHAO Jing YANG Ning CHEN Xinglin JIANG Qingru ZENG Runying Department of Marine Technology and ocean Engineering College of Oceanography and Environmental Science Xiamen University Xiamen 361005 China Key Laboratory of Marine Biogenetic Resources Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

The diversity of modular polyketide synthase （PKS） genes in sediments of Ardley Island in Antarctica, was studied by restriction fragment length polymorphism （RFLP） analysis. Phylogenetic analysis of 14 amino acid （AA） sequences indicates that the identified ketosynthase （KS） domains were clustered with those from diverse bacterial groups, including Cyanobacteria, γ-Proteobacteria, Actinobacteria, Firmicutes, and some unidentified microorganisms from marine sponge, bryozoan and other environmental samples. The obtained KS domains showed 43%–81% similarity at the AA level to reference sequences in GenBank. Six identified KS domains showed diverse sequences of the motif （VQTACSTS） that was used to identify the hybrid PKS/nonribosomal peptide synthetase （NRPS） enzyme complex, and formed a new branch. These results reveal a high diversity and novelty of PKS genes in antarctic sediments.

关键词： polyketide synthase diversity Antarctica

一种新的适用于车载Ad-hoc网络的位置服务机制

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计算机科学 2011年第B10期38卷 399-401,418页

作者：李秀明方珍李帅杨露霞重庆交通大学信息科学与工程学院重庆400074 四川职业技术学院网络电子教学部成都629000

提出了一种新的适用于车载Ad-hoc网络的位置服务机制ILSV(道路交叉路口位置服务),该机制充分利用了车载网络环境的特点如存在十字路口,受交通规则约束等,将网络中节点的位置信息分布地存储在位于十字路口的位置服务器上。在大规模城市... 详细信息

提出了一种新的适用于车载Ad-hoc网络的位置服务机制ILSV(道路交叉路口位置服务),该机制充分利用了车载网络环境的特点如存在十字路口,受交通规则约束等,将网络中节点的位置信息分布地存储在位于十字路口的位置服务器上。在大规模城市仿真场景下的仿真结果表明:通过与GLS和HLS相比,ILSV获得了相当高的查询成功率,并且在网络半径很大的情况下具有较优的可缩放性。

关键词：道路交叉路口位置服务车载Ad-hoc网络城市环境十字路口