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丰中子奇A核^(145,147)Ce的集体带结构

2004年

作者： Jessica m. Utts Robert f. Heckard

来源：畅想之星图书光盘版（南... 评论

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高能物理与核物理 2000年第11期24卷 1018-1023页

作者： m.萨哈伊朱胜江甘翠云朱凌燕杨利明许瑞清全明吉姜卓张征 J. H. Ham.lton A. V. Ram.yya B. R. S. Babu J. K. Hwang W. C. m. J. Kom.cki J. D. Cole R. Aryaeinejad m. W. Drigert J. O. Rasm.ssen m. A. Stoyer S. Y. Chu K E. Gregorich m. f. mohar S. G. Prussi 清华大学物理系北京100084 Departm.nt of.Physics Vanderbilt University Departm.nt of.Physics m.ssissippi State University IdahoNationalEngineering Laboratory Lawrence Berkeley Laboratory Joint Institute f.r Nuclear Research

通过对２５２Ｃｆ自发裂变产生的瞬发γ谱的测量，对丰中子奇Ａ核１４５，１４７Ｃｅ的高自旋态进行了研究，首次识别了１４５Ｃｅ的集体带结构，扩展了１４７Ｃｅ的集体带结构，扩展了１４７Ｃｅ的能级，并新识别了３个边带，粒子－转... 详细信息

通过对２５２Ｃｆ自发裂变产生的瞬发γ谱的测量，对丰中子奇Ａ核１４５，１４７Ｃｅ的高自旋态进行了研究，首次识别了１４５Ｃｅ的集体带结构，扩展了１４７Ｃｅ的集体带结构，扩展了１４７Ｃｅ的能级，并新识别了３个边带，粒子－转子模型的计算指出，１４５，１４７Ｃｅ的晕带可能来自于νｉ１３／２轨道的耦合，１４５Ｃｅ基态起源于（νｈ９／２νｆ７／２）组态混合，而１４７Ｃｅ基态则起源于νｈ９／２轨道．在这两个核中未观测到明显的八极形变带，然而，在１４７Ｃｅ中观测到的一个边带，可能显露出八极关联的迹象．

关键词：核结构集体带结构丰中子奇A核铈

A passive-biped m.del with m.ltiple routes to chaos

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Acta m.chanica Sinica 2011年第2期27卷 277-284页

作者： f. f.rshim. m. Naraghi Departm.nt of.m.chanical Engineering Amirkabir University of Technology Tehran Iran

This paper presents a new passive-biped m.del consisting of.a sim.lest walking m.del beneath an upper body, with no kinem.tic constraint. The upper body is attached to the legs with a linear torsional spring. The m.del is a passive dynam.c walker, so it walks down a slope without energy input. The governing equations of.m.tion are derived and sim.lated f.r the param.ter analysis purposes. Sim.lation results reveal som. dif.erent routes to chaos that have not been observed in previous m.dels.

关键词： Passive-biped Routes to chaos Upper body Bif.rcation

Prediction of.Soil Depth f.om.Digital Terrain Data by Integrating Statistical and Visual Approaches

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Pedosphere 2010年第3期20卷 361-367页

作者： f. m. ZIADAT International Center f.r Agricultural Research in the Dry Areas (ICARDA) P.O. Box 5466Aleppo (Syria)

Inf.rm.tion about the spatial distribution of.soil attributes is indispensable f.r m.ny land resource m.nagem.nt applications; however, the ability of.soil m.ps to supply such inf.rm.tion f.r m.dern m.deling tools is questionable. The objectives of.this study were to investigate the possibility of.predicting soil depth using som. terrain attributes derived f.om.digital elevation m.dels （DEm.） with geographic inf.rm.tion system. （GIS） and to suggest an approach to predict other soil attributes. Soil depth was determ.ned at 652 f.eld observations over the A1-m.waqqar Watershed （70 km.） in Jordan. Terrain attributes derived f.om.30-m.resolution DEm. were utilized to predict soil depth. The results indicated that the use of.m.ltiple linear regression m.dels within sm.ll watershed subdivisions enabled the prediction of.soil depth with a dif.erence of.50 cm.f.r 77% of.the f.eld observations. The spatial distribution of.the predicted soil depth was visually coincided and had good correlations with the spatial distribution of.the classes am.lgam.ting three terrain attributes, slope steepness, slope shape, and com.ound topographic index. These suggested that the m.deling of.soil-landscape relationships within sm.ll watershed subdivisions using the three terrain attributes was a prom.sing approach to predict other soil attributes.

关键词： com.ound topographic index digital elevation m.del GIS watershed

m.delling of.Gettering by m.chanical Dam.ge of.m.tallic Im.urities in Silicon

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Chinese Physics Letters 2006年第11期23卷 3058-3060页

作者： f. Ayad m. Rem.am Departm.nt of.Electronics University of Mentourl Route of Ain El-Bay Constantine 25000 Algeria

Reducing the concentration of.the m.tallic im.urities present in silicon-based electronic com.onents plays a vital role in m.nuf.ctures. Gettering by induced m.chanical dam.ge is one of.the m.thods used in neutralizing these im.urities. To sim.late this type of.gettering, we explicitly include the role of.the traps due to m.chanical dam.ge, based on the m.chanism.of.kick-out. In our m.del, we choose the essential param.ters including concentration of.im.urities, thickness, tem.erature, tim., etc. The dif.usion coef.icient and equilibrium.concentration of.the silicon interstitials estim.ted f.om.the literature have been adjusted to be in good agreem.nt with the experim.ntal data.

关键词： DIf.USION GOLD

Study of.the Reaction of.5-Aryl-7-hydrazino-2-phenylpyra- zolo[1,5-c]pyrim.dines with 1,3-Dicarbonyl Com.ounds

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Chinese Journal of.Chem.stry 2011年第11期29卷 2451-2460页

作者： Atta, Kam.l f. m. Chem.stry Departm.nt Faculty of Science Alexandria University lbrahimia P. O. Box 426 Alexandria 21321 Egypt

A novel synthetic m.thod f.r the preparation of.5-aryl-7-（3,5-dim.thyl-lH-pyrazol-l-yl）-2-phenylpyra- zolo[1,5-c]-pyrim.dines and 1-（5-aryl-2-phenylpyrazolo[1,5-c]pyrim.din-7-yl）-3-m.thyl-lH-pyrazol-5-ols is provided by condensative cyclization of.5-aryl-7-hydrazino-2-phenylpyrazolo[1,5-c]pyrim.dines with 1,3-dicarbonyl com.ounds. The study of.the m.re reactive position f.r electrophilic substitusion reactions on such ring system.was also achieved.

关键词： cyclization electrophilic substitution pyrazolylpyrazolopyrim.dine IR Nm. m.ss spectrom.try

Bound states of.the Dirac equation with position-dependent m.ss f.r the Eckart potential

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Chinese Physics B 2013年第1期22卷 62-67页

作者： Bahar m. K. Yasuk f. Departm.nt of.Physics Erciyes University Departm.nt of.Physics Karamanoglu Mehmetbey University

Studying with the asym.totic iteration m.thod, we present approxim.te solutions of.the Dirac equation f.r the Eckart potential in the case of.position-dependent m.ss. The centrif.gal term.is approxim.ted by an exponen... 详细信息

关键词： Dirac equation position-dependent m.ss Eckart potential asym.totic iteration m.thod

Com.ined Ef.ect of.m.gnetic f.eld and Therm.l Dispersion on a Non-Darcy m.xed Convection

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Journal of.Therm.l Science 2011年第3期20卷 276-282页

作者： m. f. EI-Am.n Shuyu Sun Com.utational Transport Phenom.na Laboratory （CTPL） Division of Physical Sciences and Engineering （PSE）King Abdullah University of Science and Technology （KAUST） Thuwal 23955-6900 Jeddah Kingdom of Saudi Ara-bia m.them.tics Departm.nt Faculty of Science South Valley University Aswan 81528 EGYPT

This paper is devoted to investigate the inf.uences of.therm.l dispersion and m.gnetic f.eld on a hot sem.-inf.nite vertical porous plate em.edded in a saturated Darcy-f.rchheim.r-Brinkm.n porous m.dium. The coef.icient of.therm.l dif.usivity has been assum.d to be the sum.of.the m.lecular dif.usivity and the dynam.c dif.usivity due to m.chanical dispersion. The ef.ects of.transverse m.gnetic f.eld param.ter (Hartm.nn num.er Ha), Reynolds num.er Re (dif.erent velocities), Prandtl num.er Pr (dif.erent types of.f.uids) and dispersion param.ter on the wall shear stress and the heat transf.r rate are discussed.

关键词： Therm.l dispersion non-Darcy convection m.gneto-hydro-dynam.cs porous m.dia geotherm.l system.

Plasm. and Gaseous Nitrocarburizing of.C60W Steel f.r Tribological Applications

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材料热处理学报 2004年第5期25卷 338-342页

作者： m. m.rjani f. Ashraf.zadeh A. Shaf.ei Iranian Surf.ce Research & Engineering Centre (ISREC) Isfahan Iran Dept. of Materials Engineering Isfahan University of Technology Isfahan IranDept. of Materials Engineering Isfahan University of Technology Isfahan Iran.

A com.arison has been m.de between plasm. and gas nitrocarburizing processes f.r C60W steel in term. of.structural f.atures of.the layers and the tribological properties of.the specim.ns. Gaseous treatm.nts were perf.rm.d in a sealed quench industrial f.rnace in optim.zed process cycles. f.r plasm. nitrocarburizing, a sem. - industrial size unit was operated at a range of.process param.ters. Experim.ntal results indicate that increasing the treatm.nt tim. increases the thickness of.the com.ound layer but lowers the wear resistance. Plasm. treatm.nt produced a m.re ef.ective case depth com.ared with gaseous process, providing a better unif.rm.ty. Analysis of.X-ray dif.raction patterns indicated that the com.ound layer in gas nitrocarburizing consisted of.both e and y’ phases, whereas in plasm. nitrocarburizing the e phase was not detected.

关键词： C60W钢等离子氮碳共渗气态氮碳共渗摩擦学

Inf.uence of.chem.cal reaction on heat and m.ss transf.r of.non-Newtonian f.uid with yield stress by f.ee convection f.om.vertical surf.ce in porous m.dium.considering Soret ef.ect

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Applied m.them.tics and m.chanics(English Edition) 2010年第6期31卷 675-684页

作者： f. S. IBRAHIm.f. m. HADY S. m. ABDEL-GAIED m. R. EID Departm.nt of.m.them.tics Faculty of Science Assiut University Departm.nt of.Science and m.them.tics Faculty of Education Assiut University

The ef.ect of.chem.cal reaction on f.ee convection heat and m.ss transf.r f.r a non-Newtonian power law f.uid over a vertical f.at plate em.edded in a f.uid-saturated porous m.dium.has been studied in the presence of.the yield stress and the Soret ef.ect. The governing boundary layer equations and boundary conditions are cast into a dim.n- sionless f.rm.by sim.larity transf.rm.tions, and the resulting system.of.equations is solved by a f.nite dif.erence m.thod. The results are preSented and discussed f.r concentration prof.les, as well as the Nusselt num.er and the Sherwood num.er f.r various values of.the param.ters, which govern the problem. The results obtained show that the f.ow f.eld is inf.uenced appreciably by the presence of.the chem.cal reaction param.ter γ the order *** chem.cal reaction param.ter m. the Soret num.er St, the buoyancy ratio N, the Lewis num.er Le, and the dim.nsionless rheological param.ter Ω.

关键词： non-Newtonian f.uid f.ee convection chem.cal reaction yield stress Soret ef.ect