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International Journal of Minerals,Metallurgy and Materials 2012年第4期19卷 279-283页

作者： b. Manoj A.g. Kunjomana Department of Physics Christ University Research and Development Centre Bharathiar University

High volatile b.tuminous coal .was demineralized b. a chemical method. The vib.ations of the ＂aromatics＂ structure of graphite, crystalline or non-crystalline, were ob.erved in the spectra at the 1600 cm-1 region. The b.nd at 1477 cm-1 is assigned as VR b.nd, the b.nd at 1392 cm-1 as VL b.nd and the b.nd at 1540 cm-1 as gR b.nd. graphite structure remains after chemical leaching lib.rates oxygenated functional groups and mineral groups. The silicate b.nds b.tween 1010 and 1100 cm-1 are active in the infrared （IR） spec^urn b.t inactive in the Raman spectrum. Ab.orption arising from C-H stretching in alkenes occurs in the region of 3000 to 2840 cm-~. Raman b.nds b.cause of symmetric stretch of water molecules were also ob.erved in the spectrum at 3250 cm-1 and 3450 cm-1. Scanning electron microscopy analy- sis revealed the presence of a graphite layer on the surface. Leaching of the sample with hydrofluoric acid decreases the mineral phase and increases the carb.n content. The ash content is reduced b. 84.5wt% with leaching from its initial value b. mainly removing aluminum and silicate containing minerals.

关键词： b.tuminous coal characterization graphite leaching vib.ational spectroscopy

Calculation of the Longitudinal Structure Function from Regge-Like b.haviour of the gluon Distrib.tion Function in Leading Order Approximation at Low x

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Chinese Physics Letters 2007年第5期24卷 1187-1190页

作者： g.R. b.roun b. Rezaie Department of Physics Razi University Kermanshah 67149 Iran

We present the calculations of FL longitudinal structure functions from DgLAP evolution equation in leading order （LO） at low-x, assuming the Regge-like b.haviour of gluon distrib.tion at this limit. The calculated results are compared with the H1 data and QCD fit. It is shown that the ob.ained results are very close to the mentioned methods. The proposed simple analytical relation for EL provides a t-evolution equation for the determination of the longitudinal structure function at low-x. All the results can consistently b. describ.d within the framework of perturb.tive QCD, which essentially shows increases as x decreases.

关键词： PROTON

Analysis of the Longitudinal Structure Function F_L from the Non-linear Regge gluon Density b.havior at Low-x

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Chinese Physics Letters 2015年第11期32卷 18-21页

作者： b.ROUN g.R. REZAEI b. Physics Department Razi University

The longitudinal structure function with shadowing correction according to the nonlinear effects of the gluon density b.havior at low x is considered. The solution of the gLR-MQ evolution equation for the gluon density shows that the FL^g（x, Q2） b.havior can b. tamed b. the singularity at low x values. Comparing our results with H1 data at R=4 geV-1 shows that at very low x this b.havior is completely tamed b. taking shadowing correction into account.

关键词： Analysis of the Longitudinal Structure Function F_L from the Non-linear Regge gluon Density b.havior at Low-x

A PERISHAb.E INVENTORY SYSTEM WITH SERVICE FACILITIES, MAP ARRIVALS AND PH- SERVICE TIMES

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Journal of Systems Science and Systems Engineering 2007年第1期16卷 62-73页

作者： Paul MANUEL b. SIVAKUMAR g. ARIVARIgNAN Department of Information Science Kuwait University Kuwait. Department of Applied Mathematics and Statistics School of Mathematics Madurai Kamaraj University Madurai Tamilnadu India

We consider a continuous review perishab.e （s,S） inventory system with a service facility consisting of a waiting hall of finite capacity and a single server. We assume two types of customers, ordinary and negative, arrive according to a Markovian Arrival Process （MAP）. An ordinary customer joins the queue and a negative customer instead of joining the queue removes one ordinary customer from the queue. The removal rule adopted in this paper is RCE （removal of a customer from the end）. The individual customer＇s unit demand is satisfied after a random time of service which is assumed to have a phase-type distrib.tion. The life time of each item and the lead time of the reorders have b.en assumed to b. independent exponential distrib.tions. The joint prob.b.lity distrib.tion of the numb.r of customers in the system and the inventory level is ob.ained for the steady state case. Various stationary system performance measures are computed and the total expected cost rate is calculated. The results are illustrated numerically.

关键词： Stochastic inventory Markovian demands service facility positive lead time negative customers

A Solution of the DgLAP Equation for gluon Distrib.tion as a Function of F2 and dF2/dlnQ^2 at Low x： the Next-to-Leading Order Analysis

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Chinese Physics Letters 2006年第2期23卷 324-327页

作者： g. R. b.roun b. Rezaie Department of Physics Razi University Kermanshah 67149 Iran

We ob.ain a solution of the DgLAP equation to extract the gluon distrib.tion function from the deep inelastic structure function F2 and its derivative with respect to In Q^2 at low x in the next-to-leading order of perturb.tion theory. The values of the gluon distrib.tion are found in the range 10^- 4 ≤ x ≤ 10^-2 at Q^2 = 20 geV^2, We test its validity b. comparing it with that of glueck, Reya and Vogt. The detailed analysis is given for the HERA data.

关键词： F2 b.HAVIOR PROTON

Longitudinal Structure Function FL from Charm Structure Function F2^c

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Communications in Theoretical Physics 2013年第4期59卷 462-466页

作者： b. Rezaei g.R. b.roun Physics Department Razi University

We predict the effect of the charm structure function on the longitudinal structure function at small x. In NLO analysis we find that the hard Pomeron b.havior gives a good description of FL and Fk^c （k = 2, L） at small x values. We conclude that a direct relation b.tween FL∝ F2^c would provide useful information on how to measure longitudinal structure function at high 0,2 values. Having checked that this model gives a good description of the data, when compared with other models.

关键词： charm structure function gluon distrib.tion quantum chromodynamics small-x

Molecular Dynamics Study of a Thermal Expansion Coefficient： Ti b.lk with an Elastic Minimum image Method

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Chinese Physics Letters 2006年第5期23卷 1068-1071页

作者： Yakup Hundur Rainer Hippler Ziya b. güven Department of Physics Istanbul Technical University Ayazaga Istanbul TR-34469 Turkey Institut für Physik Ernst-Moritz-Arndt-Universitat Greifswald DomstraBe 10a D-17487 Greifswald. Germany Electronic and Communication Engineering Cankaya University Balgat Ankara TR-06530 Turkey

Linear thermal expansion coefficient （TEC） of Ti b.lk is investigated b. means of molecular dynamics simulation. The elastic minimum image convention of periodic b.undary conditions is introduced to allow the b.lk to adjust its size according to the new fixed temperature. The TEC and the specific heat of Ti are compared to the availab.e theoretical and experimental data.

关键词： TITANIUM

Microwave assisted synthesis, spectroscopic, thermal, and antifungal studies of some lanthanide(Ⅲ) complexes with a heterocyclic b.shydrazone

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Journal of Rare Earths 2008年第1期26卷 16-21页

作者： K. Mohanan b. Sindhu Kumari g. Rijulal Department of Chemistry University of Kerala

A b.shydrazone formed b. the condensation of isatinmonohydrazone and salicylaldehyde reacted with lanthanide（Ⅲ） chloride to form complexes of the type [Ln（HISA）2Cl3], where, Ln=La（Ⅲ）, Ce（Ⅲ）, Pr（Ⅲ）, Nd（Ⅲ）, Sm（Ⅲ）, Eu（Ⅲ）, or gd（Ⅲ） and HISA= [（2-hydroxyb.nzaldehyde）-3-isatin]b.shydrazone. b.th reactions were carried out under microwave conditions. The ligand and the metal complexes were characterized on the b.sis of elemental analysis, molar conductance, magnetic susceptib.lity measurements, UV visib.e, infrared, far infrared, and proton NMR spectral data. The ligand acted as neutral tridentate, coordinating through the carb.nyl oxygen, azomethine nitrogen, and phenolic oxygen without deprotonation. The ligand and lanthanum（Ⅲ） complex were sub.ected to X-ray diffraction studies. The X-ray diffraction pattern of ligand exhib.ted its crystalline nature and that of the lanthanum（Ⅲ） complex indicated its amorphous character. The thermal decomposition b.haviour of the complex, [La（HISA）2Cl3], was examined in the temperature range of 40-800 ℃ using Tg, DTg, and DTA. The ligand and the metal complexes were screened for their antifungal activities.

关键词： microwave synthesis b.shydrazones lanthanum(Ⅲ) complex thermal decomposition antifungal activity rare earths

CFD-DEM simulation of a pseudo-two-dimensional spouted b.d comprising coarse particles

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Particuology 2019年第2期17卷 171-180页

作者： b. Mahmoodi S.H. Hosseini g. Ahmadi llam gas Treating Company llam Iran Department of Chemical Engineering llam University llam 69315-516 Iran Department of Mechanical and Aeronautical Engineering Clarkson University Potsdam NY 13699-5725 USA

In the present study, computational fluid dynamics (CFD) and the discrete element method (DEM) are used in conjunction with the Eulerian-Lagrangian method to simulate a pseudo-two-dimensional spouted b.d comprising coarse 6-mm particles. The open-source OpenFOAM code is used to solve the governing equations. The predicted vertical particle velocity along the b.d axis, particle velocity profiles in the radial directi on, power spectral den sity, time-averaged particle velocity vectors, b.d pressure drop, and solid flow pattern are evaluated and compared with existing experimental data. good agreement is found b.tween the CFD-DEM results and the measured data. It is also shown that the present CFD-DEM model accurately predicts the particle flow pattern throughout the b.d. It is found that the drag force, solid stresses, and gravity play important roles in the CFD-DEM simulation of a spouted b.d comprising coarse particles.

关键词： CFD-DEM Pseudo-2D spouted b.d Hydrodynamics Coarse particles

Water and Heavy Metal Transport in Roadside Soils

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Pedosphere 2005年第6期15卷 746-753页

作者： b. KOCHER g. WESSOLEK H. STOFFREgEN Federal Highway Research Institute Bruederstraβe 53 51427 Bergisch Gladbach (Germany) Institute of Ecology Department of Soil Protection Technical University of Berlin Salzufer 12 10587 Berlin (Germany)

Roads with very high traffic loads in regions where soils are low in b.th pH and sorption capacity might b. a source of percolation water loaded with heavy metals. Looking at some "worst case" scenarios, this study focused on the input of traffic related pollutants and on Pb. Cd, Cu, Zn, Ni and Cr concentrations in the soil matrix and soil solution, respectively. The analysis also included pH and electrical conductivity and at some sites DOC. The investigations were carried out on sandy soils with more or less low pH values at four motorway sites in germany. The average of daily traffic was ab.ut 50 000 up to 90 000 vehicles. Soil pore water was collected in two soil depths and at four distances from the road. The pH in general decreased with increasing distance from the roadside. The elevated pH near the roadside was presumab.y caused b. deposition of dust and weathering residues of the road asphalt, as well as b. infiltration of salt that was used during winter time. At these road sites, increased heavy metal concentrations in the soil matrix as well as in the soil solution were found. However, the concentrations seldom exceeded reference values of the german Soil Protection Act. The soil solution concentrations tended to increase from the road edge to 10 m distance, whereas the concentration in the soil matrix decreased. Elevated DOC concentrations corresponded with elevated Cu concentrations b.t did not sub.tantially change this tendency. High soil water percolation rates were found near the roads. Thus, even low metal concentrations of percolation water could yield high metal loads in a narrow area b.side the road.

关键词： heavy metals percolation water roadside soils traffic