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176 个结果
  • 简介:Thelabels'Hellenes'and'Hellas'areoftenconsideredtobecollectivenamesfortheGreeksandhaveacloseconnectionwiththeterm'Panhellenes.'ThisarticlestudiestheprocessofnamingtheGreeksintheArchaicperiodandtherelationshipbetweenthesecollectivenamesandthenotionofPanhellenism.Byaliteraryandetymologicalexaminationoftherelevantsources,itsuggeststhatthedesignation'Hellenes'probablydidnotevolvefromthatof'Panhellenes'andthattheterms'Hellenes'and'Hellas,'butnot'Panhellenes,'probablyhavegenericsignificanceinthesixthcentury.Furthermore,withtheOlympicGamesandtheHellenion,aGreeksanctuaryinNaucratis,astwostudycases,thearticleshowsthecomplexityofthedevelopmentofGreekidentification.Ontheonehand,collectivenameslike'Hellenes'and'Hellas'haveacentripetalforceontrans-regionaloccasions,andontheother,thoseeventsalsofeaturecompetition,privilegeandexpresscivicidentitiesofbothindividualandcommunity,whichseemstobedivisive.

  • 标签: 期刊 编辑工作 规范 写作方法
  • 简介:Thisyearmarksthesecondyearafterweenteredthenewcentury.Onthewhole,Chinaisfacingasoundinternationalsituationandsecurityenvironment.Tworeasonsconcernedcouldbementioned:first,inthepastyear,theforeignrelationsofourcountrydevelopedstablyandsteadilyinseveralmajoraspects,withoutanyseriousknottyeventsoccurring.ThesameisbasicallytrueinChina’srelationswith

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  • 简介:ThetalentistheenginefactorforShanghaiwhiletransformingtheeconomicdevelopmentmodelinthe12the-five-year-planperiod.TodaythetalentdevelopmentstrategyinShanghaiisnotonlyfacingthegreatchallengesfrominternationalmetropolisanddomesticcities,butalsoexistsaseriesofstructuralproblemsforitself.Toacquireandmaintainitscompetitiveadvantagesinaneraofglobalbrainbattleinfuture,Shanghaineedstodefinitelyorientitsmissiontowardsaglobaltalenthub,acceleratethepaceoftalentsinternationalization,strengthentheadjustmentefforttotalentstructures,enforcethemarketallocationmechanism,optimizethetalentecosystemandinnovatethesystemandmechanism.

  • 标签: 人才战略 城市转型 经济发展模式 国际大都市 竞争优势 发动机
  • 简介:DefinitionofanewgeologicperiodfortheIastintervaloftheProterozoicEon,theEdiacaran,wasrecentlyratifiedbytheIUGS.TheEdiacaranPeriodisthefirstProterozoicperiodtoberecognizedonthebasisofchronostratigraphiccriteria,thefirstinternationallyratified,chronostratigraphicallydefinedperiodofanyagetobeintroducedinmorethan120years,andthefirsttobedefinedbya“goldenspike”intheSouthernhemisphere.

  • 标签: 埃迪卡拉生物种群 地理周期 古生代 地层年代
  • 简介:TheAmericanandBritishwaragainstIraqstartedonMarch20,2003notonlycausedheavycasualtiesandecologicalenvironmentaldisastersbutalsoexertedimpactonregionalandworldsecurity,stabilityanddevelopment.Evensothewarisalocalwar,anditisunlikelyto

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  • 简介:Objective:Toevaluatetheeffectofosteoporosisonfracturehealingthroughobservingthehistomorphologicalchanges,bonemineraldensityofcallusandexpressionanddistributionoftransforminggrowthfactorbeta1(TGF-β1),basicfibroblastgrowthfactor(bFGF)andbonemorphogeneticprotein-2(BMP-2)inovariectomizedrats.Methods:SixtyfemaleSprague-Dawleyrats(aged12weeksandweighing235gonaverage)wererandomlydividedintoanovariectomized(OVX)group(n=30)andasham-operated(SO)group(n=30).OvariectomywasperformedintheOVXratsandsameincisionwasmadeintheSOrats.Threemonthslater,fractureoffemoralshaftwasmadeonalltherats.Thentheywerekilledatdifferenttimepoints.Callusformationwasobservedwithhistologicalandimmunohistochemicalmethods.Results:AreductionincallusandbonemineraldensityinthehealingfemurandadecreaseofosteoblastsexpressingTGF-β1nearthebonetrabeculawereobservedintheOVXrats3-4weeksafterfracture.HistomorphologicalanalysisrevealedahighercontentofsoftcallusintheOVXratsthanthatintheSOrats.ImmunohistochemistryresultsshowedthatnoremarkabledifferenceinexpressionanddistributionofBMP-2andbFGFbetweentheOVXandSOgroupswasfound.Conclusions:Osteoporosisinfluencesthequantityandqualityofcallusduringtheearlyperiodoffracturehealing.TheeffectofosteoporosisonfracturehealinghasnorelationshipwiththeexpressionofBMP-2orbFGF.ThedecreasedexpressionofTGF-β1inosteoblastsmaycauseadecreaseinqualityoffacturehealingafterosteoporosis.

  • 标签: 骨质疏松症 骨折 早期治疗 绝经 去势大鼠 细胞因子
  • 简介:ThedirectedmotionofaBrownianparticleinaflashingpotentialwithvarioustransitionprobabilitiesandwaitingtimesinoneoftwostatesisstudied.AnexpressionfortheaveragecycleperiodisproposedandthesteadycurrentJoftheparticleiscalculatedviaLangevinsimulation.Theresultsshowthattheoptimalcycleperiodrm,whichtakesthemaximumofJ,isshiftedtoasmallvaluewhenthetransitionprobabilityλfromthepotentialontothepotentialoffdecreases,themaximalcurrentappearsinthecaseoftheaveragewaitingtimeinthepotentialonbeinglongerthaninthepotentialoff,andthedirectionofcurrentdependsontheratiooftheaveragetimeswaitingintwostates.

  • 标签: 布朗运动 电流 不对称变换 粒子运动模型 LANGEVIN方程
  • 简介:InSeptember-October2000,theGuizhouProvincialInstituteofAntiquityandArchaeologyandHezhangCountyCommissionforPreservationofAncientMonumentsjointlyexcavatedtombsoftheWarringStatesperiodtoWesternHantimesatKele可乐,VillageinKeleTown,Hezhang赫章County,Guizhou贵州andreapedgreatfruits.DuetothetombsareoftheancientYelangperiodandtheburialcustomandfuneraryobjectshavedistinctivelocalethnicfeatures,theexcavationarousedmoreinterestintheacademiccircle.

  • 标签: 中国 贵州 可乐村 墓葬 叶郎时代 文物考古
  • 简介:Epidemicsstillhappen,beingtheannualinfluenzaoutbreaksexamplesofsuchoccurrences.Toestimatetheepidemicperiodlengthisimperativebecause,inthisperiod,itisnecessarytostrengthenthehealthcare,throughextraavailabilityinhumanandmaterialresources.So,ahugeincreaseofexpensesoccurs.Asapandemicisanepidemicwithagreatpopulationandgeographicaldissemination,moreappropriatelythishappenswiththepandemicperiod.MainlyusingresultsontheM|G|∞queuebusyperiod,itispresentedanapplicationofthisqueuesystemtothepandemicperiod’sparametersanddistributionfunctionstudy.

  • 标签: M|G|∞ BUSY PERIOD PANDEMIC COST
  • 简介:这份报纸为可逆二次的系统的一个类被奉献给时期函数的学习$\begin{聚在一起}\dotx=-2xy,\hfill\\\doty=k-1-2kx+\left({k+1}\right)x^2-\tfrac{1}{2}y^2。\hfill\\\end{聚在一起}$\begin{聚在一起}\dotx=-2xy,\hfill\\\doty=k-1-2kx+\left({k+1}\right)x^2-\tfrac{1}{2}y^2。\hfill\\\end{聚在一起}

  • 标签: 可逆 心功能 函数单调性 二次系统 周期函数 临界点
  • 简介:Weinvestigatetheperiodhalvingofpersistentcurrents(PCs)ofnon-interactingelectronsinisolatedmesoscopicMobiusladderswithoutdisorder,piercedbyAharonov-Bohmflux.Themechanismsoftheperiodhalvingeffectdependontheparityofthenumberofelectronsaswellasontheinterchainhopping.AlthoughthedataofPCsinmesoscopicsystemsaresamplespecific,somesimplerulesarefoundinthecanonicalensembleaverage,forexample,alltheoddharmonicsofthePCsdisappearandthesignalsofevenharmonicsarenon-negative.

  • 标签: 永久性电流 Mobius梯子 永久电流周期 量子力学
  • 简介:Theauthorsanalyzeafinitehorizon,singleproduct,periodreviewmodelinwhichpricingandinventorydecisionsaremadesimultaneously.Demandsindifferentperiodsarerandomvariablesthatareindependentofeachotherandtheirdistributionsdependontheproductprice.Pricingandorderingdecisionsaremadeatthebeginningofeachperiodandallshortagearebacklogged.Orderingcostisaconvexfunctionoftheamountordered.Theobjectiveistofindaninventoryandpricingpolicymaximizingexpecteddiscountedprofitoverthefinitehorizon.Theauthorscharacterizethestructureoftheoptimalcombinedpricingandinventorystrategyforthismodel.Moreover,theauthorsdemonstratehowtheprofit-to-gofunction,orderuptolevel,reorderpointandoptimalpricechangewithrespecttostateandtime.

  • 标签: 库存控制模型 定价模型 产品价格 库存决策 随机变量 价格政策
  • 简介:现在的学习试图在差错地区揭示postseismic液体压力的恢复时期,提供进地震复发的卓见。数字建模基于2D被执行在地震差错以内模仿液体活动的简单分层的差错阀门模型。为了表明postseismic液体的特征,处于自然状态迫使,构造运动的干扰没被考虑。postseismic液体压力的恢复时期包括一个suddenchanging时期和一个长得多的波动时期。当模特儿的结果证明那差错渗透和孔是敏感参数并且与在地震差错地区的液体压力的恢复时期相对地成正比。当渗透从10把-15归结为10-18m2,时,恢复时期correspondently从400~2000年增加。上面、更低的液体压力被阀门封口分开,引起他们在相反的趋势的变化。

  • 标签: 流体压力 复故障 密封阀 震后 数值模拟 地震断层