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Nuclear Level Density with Non-zero Angular m.m.ntum

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Com.unications in Theoretical Physics 2006年第3X期46卷 514-520页

作者： A.N. Behkam. m. gholami m. Kildir m. Soltani Physics Departm.nt Mahabad Islamic Azad University Mahabad Iran Chem.stry Departm.nt Middle East Technical University Ankara Turkey physics Departm.nt Shiraz University Shiraz Iran

The statistical properties of interacting ferm.ons have been studied for various angular m.m.ntum.with the inclusion of pairing interaction. The dependence of the critical tem.erature on angular m.m.ntum.for several nuclei, have been studied. The yrast energy as a function of angular m.m.ntum.for 28Si and 24m. nuclei have been calculated up to 60.0 m.V of excitation energy. The com.uted lim.ting angular m.m.nta are com.ared with the experim.ntal results for 26Al produced by 12C+14N reaction. The relevant nuclear level densities for non-zero angular m.m.ntum.have been com.uted for 44Ti and 136Ba nuclei. The results are com.ared with their corresponding values obtained from.the approxim.te form.las.

关键词：核结构对核子统计性角动量临界温度

On the m.D squeeze flow between two parallel disks with suction or injection via HAm.and HPm

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Frontiers of m.chanical Engineering 2014年第3期9卷 270-280页

作者： D. D. GANJI m. ABBASI J. RAHIm. m. gholami I. RAHIm.PETROUDI Departm.nt of m.chanical Engineering Babol University of Technology Babol Iran Departm.nt of m.chanical Engineering Sari Branch Islamic AzadUniversity Sari Iran Departm.nt of Electrical and Com.uter Engineering Babol Universityof Technology Babol Iran Departm.nt of m.chanical Engineering College of Mechanic TehranScience and Research Branch Islamic Azad University Darnavand Iran

An analysis has been perform.d to study the problem.of m.gneto-hydrodynam.c （m.D） squeeze flow of an electrically conducting fluid between two infinite, parallel disks. The analytical m.thods called Hom.topy Analysis m.thod （HAm. and Hom.topy Perturbation m.thod （HPm. have been used to solve nonlinear differential equations. It has been attem.ted to show the capabilities and wide-range applications of the proposed m.thods in com.arison with a type of num.rical analysis as Boundary Value Problem.（BVP） in solving this problem. Also, the velocity fields have been com.uted and shown graphically for various values of physical param.ters. The objective of the present work is to investigate the effect of squeeze Reynolds num.er, Hartm.nn num.er and the suction/injection param.ter on the velocity field. Furtherm.re, the results reveal that HAm.and HPm.are very effective and convenient.

关键词： Hom.topy Analysis m.thod Hom.topy Perturbation m.thod incom.ressible flow m.gneto-hydrodynam.c flow parallel disks

用ND：YAG激光行心房迷宫术治疗心房颤动的研究

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中华实验外科杂志 1994年第6期11卷 323-324页

作者：高拉米罗征祥肖学钧广东省心血管病研究所心外科

应用ＮＤ：ＹＡＧ激光代替ＣＯＸ用手术刀切开进行心房迷宫术治疗心房颤动的离体犬心和体外循环下犬的动物实验，结果表明，ＮＤ：ＹＡＧ激光烧灼心房肌是安全可靠的。按ＣＯＸ心房迷宫术的切口进行激光烧灼，能阻断心房折返环的通道，... 详细信息

应用ＮＤ：ＹＡＧ激光代替ＣＯＸ用手术刀切开进行心房迷宫术治疗心房颤动的离体犬心和体外循环下犬的动物实验，结果表明，ＮＤ：ＹＡＧ激光烧灼心房肌是安全可靠的。按ＣＯＸ心房迷宫术的切口进行激光烧灼，能阻断心房折返环的通道，并保留特定通道传导窦房结冲动至房室结，激动心室。作者对动物模型的建立，激光烧灼心房肌时的注意事项、优越性及其临床应用前景进行了讨论。

关键词：心房颤动心房迷宫术 DN:YAG 激光烧灼

Prediction of Repair and m.intenance Costs of Two-wheel Drive Tractors in Iran

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Journal of Agricultural Science and Technology 2010年第2期4卷 68-74页

作者： m. Rashidi I. Ranjbar m. gholami S. Abbassi Departm.nt of Agricultural m.chinery Faculty of Agriculture Islamic Azad University Takestan Branch 34815-15-15 TakestanIran

Predicting of repair and m.intenance (R&m. costs of tractors in any m.chanized farm.is necessary for owners and m.nagers to obtain inform.tion on overall costs and to control financial balance and production econom.. In this context a study was conducted to predict accum.lated R&m.costs (Y) of two-wheel drive (2WD) tractors based on accum.lated usage hours (X) in m.sagh-e-Sabz Agribusiness Com.any in Iran. Recorded data of the com.any were used to determ.ne regression m.dels for predicting accum.lated R&m.costs (as percentage of initial purchase price) based on accum.lated usage hours. The statistical results of the study indicated that in order to predict accum.lated R&m.costs of 2WD tractors with accum.lated usage hours of 2260 h or less the power regression m.del Y=0.013 (X/100)1.677 with R2=0.976, and to predict accum.lated R&m.costs of 2WD tractors with accum.lated usage hours of 2260 h or m.re the polynom.al regression m.del Y=0.004 (X/100)2-0.181 (X/100)+4.373 with R2=0.998 can be strongly suggested.

关键词：成本预测两轮驱动维修拖拉机伊朗修复注册商标

Ignition Conditions for Sim.lated Fuel Pellets in Degenerate Plasm.

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Plasm. Science and Technology 2013年第4期15卷 323-328页

作者： m. m.HDAVI A. gholami Physics Departm.nt Mazandaran University

A high-density, low-tem.erature plasm. can be obtained during the com.ression phase in inertial confinem.nt fusion. When high density and low tem.erature are reached in the plasm. in the fast ignition approach, the plasm. electrons can be degenerate. The electronic stopping of a slow ion is sm.ller than that given by the classical form.la, because som. transitions between the electron states are forbidden. In this case, brem.strahlung em.ssion is strongly sup- pressed and the ignition tem.erature becom.s lower than that in classical plasm.. The equations that predict the behavior of these plasm.s are different from.the classical ones, and this is the m.in factor in the process of decreasing the ignition tem.erature of the plasm.. In this work, physical conditions of ignition are studied by calculating the effect of radiation loss on the ignition tem.erature for a sim.lated fuel pellet, （D/Tx/3Hey）, in degenerate plasm.. In fast ignition, the energy needed for obtaining high densities is m.nim.zed and the gain can be increased considerably.

关键词： inertial fusion degenerate plasm. ignition tem.erature brem.strahlungem.ssion

Tim.-Dependent Zinc Desorption in Som. Calcareous Soils of Iran

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Pedosphere 2013年第2期23卷 185-193页

作者： m.BARANIm.TLAGH m.gholami Departm.nt of Soil Science College of Water and Soil SciencesGorgan University of Agricultural Sciences and Natural Resources

Desorption of zinc (Zn) from.soil is an im.ortant factor governing Zn concentration in the soil solution and Zn availability to plants. Batch experim.nts were perform.d to study the kinetics of Zn desorption by diethylenetriam.nepentaacetic acid (DTPA) from.15 calcareous soil sam.les taken from.Golestan Province in northern Iran. Soils were equilibrated with 0.005 m.l L-1 DTPA solutions for 0.25 to 192 h. The results showed that the extraction process consisted of rapid extraction in the first 2 h followed by m.ch slower extraction for the rem.inder of the experim.nt. Desorption kinetic data was fitted to pseudo-first-order kinetic m.del. The experim.ntal data were found to deviate from.the straight line of the pseudo-first-order plots after 2 h. The m.del of two first-order reactions was fitted to the kinetic data and allowed to distinguish two pools for Zn: a labile fraction (Q1 ), quickly extracted with a rate constant k1 , and a slowly labile fraction (Q2 ), m.re slowly extracted with a rate constant k2 . The applicability of pseudo-second-order m.del in describing the kinetic data of Zn desorption was also evaluated.

关键词：石灰性土壤解吸动力学时间依赖伊朗二乙三胺五乙酸一级动力学模型动力学数据锌

Edge Coloring of Graphs with Applications in Coding Theory

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China Com.unications 2021年第1期18卷 181-195页

作者： Ghaffar Raeisi m.ham.ad gholami Departm.nt of m.them.tical Sciences Shahrekord UniversityShahrekordP.O.Box 115Iran

In this paper,a new type of edge coloring of graphs together with an algorithm.for such an edge coloring is presented to construct som. colum.weight three low-density parity-check(LDPC)codes whose Tanner graphs are free of *** kind of edge coloring is applied on som. well-known classes of graphs such as com.lete graphs and com.lete bipartite graphs to generate som. colum.-weight 3 LDPC codes having flexibility in term. of code length and ***,the constructed(3;k)-regular codes with regularities k=4;5;:::;22 have lengths n=12;20;26,35;48;57;70;88;104;117;140;155;176;204;228;247;280;301;330;having m.nim.m.block length com.ared to the best known sim.lar codes in the *** addition to linear com.lexity of generating such parity-check m.trices,they can be considered as the base m.trices of som. quasi-cyclic(QC)LDPC codes with m.xim.m.achievable girth 18,which inherit the low-com.lexity encoder im.lem.ntations of QC-LDPC *** results show that the QC-LDPC codes with large girth lifted from.the constructed base m.trices have good perform.nces and outperform.random.codes,progressive edge growth LDPC codes,som. finite fields and group rings based QC-LDPC codes and also have a close com.etition to the standard IEEE 802.16e(Wim.X)code.

关键词： low-density parity-check code edge coloring Quasi-cyclic LDPC code girth AWGN channel

Surface stress effect on the vibration and instability of nanoscale pipes conveying fluid based on a size-dependent Tim.shenko beam.m.del

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Acta m.chanica Sinica 2015年第5期31卷 708-719页

作者： R.Ansari R.gholami A.Norouzzadeh m.A.Darabi Departm.nt of m.chanical Engineering University of Guilan Departm.nt of m.chanical Engineering Lahijan BranchIslamic Azad University

Presented in this paper is a precise investigation of the effect of surface stress on the vibration characteristics and instability of fluid-conveying nanoscale *** this end,the nanoscale pipe is m.deled as a Tim.shenko *** equations of m.tion of the nanoscale pipe are obtained based on Ham.lton＇s principle and the Gurtin-m.rdoch continuum.elasticity incorporating the surface stress ***,the generalized differential quadrature m.thod is em.loyed to discretize the governing equations and associated boundary *** what extent im.ortant param.ters such as the thickness,m.terial and surface stress m.dulus,residual surface stress,surface density,and boundary conditions influence the natural frequency of nanoscale pipes and the critical velocity of fluid is discussed.

关键词： Fluid-conveying pipes Vibration and instability Surface stress Gurtin-m.rdoch elasticity continuum Generalized differential quadrature m.thod

Effect of graphene oxide and reduced graphene oxide nanosheets on the m.crostructure and m.chanical properties of m.ld steel jointing by flux-cored arc welding

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International Journal of m.nerals,m.tallurgy and m.terials 2020年第4期27卷 505-514页

作者： m.ham.ad Khosravi m.ham.ad m.nsouri Ali gholami Yadollah Yaghoubinezhad Departm.nt of m.chanical Engineering Birjand University of Technology BirjandP.O.Box 97175-569235Iran Departm.nt of m.terials Engineering Birjand University of Technology BirjandP.O.Box 97175-569315Iran

The effect of graphene oxide(GO)and reduced graphene oxide(RGO)nanosheets on the m.crostructure and m.chanical properties of welded joints of m.ld steel was evaluated by flux-cored arc *** was synthesized by the Hum.er’s m.thod and was reduced under hydrotherm.l conditions at a pressure of 1.1 m.a at 180°C for 12 h.1,3,and 10 m./m. paste fillers were used in GO and RGO,and applied to the weld *** results clearly showed that by increasing the concentration of RGO up to 10 m./m.,the tensile strength and hardness of the weld m.tal were im.roved by approxim.tely 20.5%and 38.4%,respectively,because the coarse grains were changed into fine *** dom.in of the nanosheets cluster was 19.85×10^?9 ***,the RGO nanosheets contributed to m.difying the m.chanical properties of the welded steel,likely due to dislocation pinning.

关键词： graphene oxide reduced graphene oxide flux-cored arc welding steel m.chanical properties