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Exact Solutions of Klein-Gordon Equation with Scalar and Vector Rosen-Morse-Type Potentials

Chinese Physics Letters 2008年第8期25卷 2754-2757页

作者： A. Soylu O. Bayrak I. Boztosun Department of Physics Nigde University 51350 Nigde Turkey Department of Physics Bozok University 66200 Yozgat Turkey Department of Physics Erciyes University 38039 Kayseri Turkey

We obtain an exact analytical solution of the Klein Gordon equation for the equal vector and scalar Rosen Morse and Eckart potentials as well as the parity-time （PT） symmetric version of the these potentials by using the asymptotic iteration method. Although these PT symmetric potentials are non-Hermitian, the corresponding eigenvalues are real as a result of the PT symmetry.

关键词： ASYMPTOTIC ITERATION METHOD NON-HERMITIAN HAMILTONIANS PT-SYMMETRIC POTENTIALS BOUND-STATES EIGENVALUE PROBLEMS DIRAC-EQUATION SCHRODINGER-EQUATION SIMILARITY TRANSFORMATION REAL PARTICLES

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Effect of sediment size on bioleaching of heavy metals from contaminated sediments of Izmir Inner Bay

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Journal of Environmental Sciences 2013年第9期25卷 1784-1794页

作者： Duyusen E.Guven Gorkem Akinci Dokuz Eylul University Faculty of Engineering Department of Environmental EngineeringKaynaklar Campus35160 Buca Izmir Turkey

The effect of sediment size on metals bioleaching from bay sediments was investigated by using fine （〈 45 μm）, medium （45-300 μm）, and coarse （300-2000 μm） size fractions of a sediment sample contaminated with Cr, Cu, Pb, and Zn. Chemical speciation of the metals in bulk and size fractions of sediment were studied before and after bioleaching. Microbial activity was provided with mixed cultures of Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans. The bioleaching process was carried out in flask experiments for 48 days, by using 5% （W/V） of solid concentration in suspension. Bioleaching was found to be efficient for the removal of selected heavy metals from every size fraction of sediments, where the experiments with the smaller particles resulted in the highest solubilization ratios. At the end of the experimental period, Cr, Cu, Pb and Zn were solubilized to the ratios of 68%, 88%, 72%, and 91% from the fine sediment, respectively. Higher removal efficiencies can be explained by the larger surface area provided by the smaller particles. The changes in the chemical forms of metals were determined and most of the metal releases were observed from the reducible and organic fractions independent from grain size. Higher concentrations were monitored in the residual fraction after bioleaching period, suggesting they are trapped in this fraction, and cannot be solubilized under natural conditions.

关键词： sediment sediment size heavy metals bioleaching Acidithiobacillus microbial activity

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Heavy metals partitioning in the sediments of Izmir Inner Bay

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Journal of Environmental Sciences 2008年第4期20卷 413-418页

作者： GUVEN Duyusen E AKINCI Gorkem Dokuz Eylul University Faculty of Engineering Department of Environmental EngineeringKaynaklar Campus35160BucalzmirTurkey.

Izmir Bay is known to be polluted by high concentrations of heavy metals and organic pollutants. Sediment samples taken from 7 different stations in Izmir Inner Bay were analyzed for their total organic matter content and, Cu, Cr, Pb and Zn. In addition, the chemical distribution of the metals were determined by means of the BCR （Community Bureau of Reference） Extraction Procedure （developed by European Commission for Standards, Measurement and Testing） which allows the determination of metals bound as four fractions; exchangeable and acid soluble, reducible （bound to iron-manganese oxides）, oxidizable （bound to organics） and residual. The results show that Izmir Inner Bay contains sediments with high metal concentrations. According to the chemical distribution of metals, Cr and Cu tend to accumulate mostly on the organic fraction of the sediment. Pb is mostly found in the reducible fraction where Zn is mobile in the sediment, and it is distributed evenly on each fraction.

关键词： heavy metal pollution Izmir Inner Bay sediment sequential extraction

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Synthesis, Spectroscopic and Electrochemical Investigations of Two vic-Dioximes and Their Mononuclear Ni（Ⅱ）, Cu（Ⅱ） and Co（Ⅱ） Metal Complexes Containing Morpholine Group

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Chinese Journal of Chemistry 2006年第11期24卷 1599-1604页

作者： KILIC, Ahmet TAS, Esref GUMGUM, Bahattin YILMAZ, Ismail Department of Chemistry Harran University Sanliurfa 63510 Turkey Department of Chemistry Dicle University Diyarbakir 21280 Turkey Department of Chemistry Technical University oflstanbul Istanbul Maslak 34469 Turkey

Two vic-dioxime ligands （LxH2） containing morpholine group have been synthesized from 4-[2-（dimethylaminoethyl）] morpholine with anti-phenylchloroglyoxime or anti-monochloroglyoxime in absolute THF at -15 ℃. Reaction of two vic-dioxime ligands with MCl2·nH2O （M： Ni, Cu or Co and n=2 or 6） salts in 1 ： 2 molar ratio afforded metal complexes of type [M（LxH）2] or [M（LxH）2·2H2O]. All of metal complexes are non-electrolytes as shown by their molar conductivities （Am） in DMF （dimethyl formamide） at 10^-3 mol·L^-1. Structures of the ligands and metal complexes have been solved by elemental analyses, FT-IR, UV-Vis, ^1H NMR and ^13C NMR, magnetic susceptibility measurements, molar conductivity measurements. Furthermore, redox properties of the metal complexes were investigated by cyclic voltammetry.

关键词： morpholine electrochemistry dioxime structure metal complex cyclic voltammetry

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Robust Integrated Models for Chinese Predicate-Argument Structure Analysis

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China Communications 2012年第3期9卷 10-18页

作者：罗彦彦浅原正幸松本裕治 Natural Language Processing Laboratory Graduate School of Information ScienceNara Institute of Science and Technology

Predicate-Argument(PA) structure analysis is often divided into three subtasks:predicate sense disambiguation,argument identification and argument *** date,they have mostly been modeled in ***,this approach neglects logical constraints between *** therefore exploite integrating predicate sense disambiguation with the latter two subtasks respectively,which verifies that the automatic predicate sense disambiguation could help the semantic role labeling *** addition,a dual decomposition algorithm is used to alleviate the error propagation between argument identification subtask and argument classification subtask by benefitting the argument identification subtask *** results show that our approach leads to a better performance with PA analysis than other pipeline approaches.

关键词：结构分析谓词综合模型中国词义消歧参数识别角色标注误差传播

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