简介：Thisyearmarksthesecondyearafterweenteredthenewcentury.Onthewhole,Chinaisfacingasoundinternationalsituationandsecurityenvironment.Tworeasonsconcernedcouldbementioned:first,inthepastyear,theforeignrelationsofourcountrydevelopedstablyandsteadilyinseveralmajoraspects,withoutanyseriousknottyeventsoccurring.ThesameisbasicallytrueinChina’srelationswith

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

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简介：DefinitionofanewgeologicperiodfortheIastintervaloftheProterozoicEon,theEdiacaran,wasrecentlyratifiedbytheIUGS.TheEdiacaranPeriodisthefirstProterozoicperiodtoberecognizedonthebasisofchronostratigraphiccriteria,thefirstinternationallyratified,chronostratigraphicallydefinedperiodofanyagetobeintroducedinmorethan120years,andthefirsttobedefinedbya“goldenspike”intheSouthernhemisphere.

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.

简介：ThedirectedmotionofaBrownianparticleinaflashingpotentialwithvarioustransitionprobabilitiesandwaitingtimesinoneoftwostatesisstudied.AnexpressionfortheaveragecycleperiodisproposedandthesteadycurrentJoftheparticleiscalculatedviaLangevinsimulation.Theresultsshowthattheoptimalcycleperiodrm,whichtakesthemaximumofJ,isshiftedtoasmallvaluewhenthetransitionprobabilityλfromthepotentialontothepotentialoffdecreases,themaximalcurrentappearsinthecaseoftheaveragewaitingtimeinthepotentialonbeinglongerthaninthepotentialoff,andthedirectionofcurrentdependsontheratiooftheaveragetimeswaitingintwostates.

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简介：InSeptember-October2000,theGuizhouProvincialInstituteofAntiquityandArchaeologyandHezhangCountyCommissionforPreservationofAncientMonumentsjointlyexcavatedtombsoftheWarringStatesperiodtoWesternHantimesatKele可乐,VillageinKeleTown,Hezhang赫章County,Guizhou贵州andreapedgreatfruits.DuetothetombsareoftheancientYelangperiodandtheburialcustomandfuneraryobjectshavedistinctivelocalethnicfeatures,theexcavationarousedmoreinterestintheacademiccircle.

简介：Epidemicsstillhappen,beingtheannualinfluenzaoutbreaksexamplesofsuchoccurrences.Toestimatetheepidemicperiodlengthisimperativebecause,inthisperiod,itisnecessarytostrengthenthehealthcare,throughextraavailabilityinhumanandmaterialresources.So,ahugeincreaseofexpensesoccurs.Asapandemicisanepidemicwithagreatpopulationandgeographicaldissemination,moreappropriatelythishappenswiththepandemicperiod.MainlyusingresultsontheM|G|∞queuebusyperiod,itispresentedanapplicationofthisqueuesystemtothepandemicperiod’sparametersanddistributionfunctionstudy.

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}

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简介：Weinvestigatetheperiodhalvingofpersistentcurrents(PCs)ofnon-interactingelectronsinisolatedmesoscopicMobiusladderswithoutdisorder,piercedbyAharonov-Bohmflux.Themechanismsoftheperiodhalvingeffectdependontheparityofthenumberofelectronsaswellasontheinterchainhopping.AlthoughthedataofPCsinmesoscopicsystemsaresamplespecific,somesimplerulesarefoundinthecanonicalensembleaverage,forexample,alltheoddharmonicsofthePCsdisappearandthesignalsofevenharmonicsarenon-negative.

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简介：Theauthorsanalyzeafinitehorizon,singleproduct,periodreviewmodelinwhichpricingandinventorydecisionsaremadesimultaneously.Demandsindifferentperiodsarerandomvariablesthatareindependentofeachotherandtheirdistributionsdependontheproductprice.Pricingandorderingdecisionsaremadeatthebeginningofeachperiodandallshortagearebacklogged.Orderingcostisaconvexfunctionoftheamountordered.Theobjectiveistofindaninventoryandpricingpolicymaximizingexpecteddiscountedprofitoverthefinitehorizon.Theauthorscharacterizethestructureoftheoptimalcombinedpricingandinventorystrategyforthismodel.Moreover,theauthorsdemonstratehowtheprofit-to-gofunction,orderuptolevel,reorderpointandoptimalpricechangewithrespecttostateandtime.

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。

简介：SixteeninvertedsiphonsareinoperationattheBeijing-ShijiazhuangsectionintheMiddleRouteoftheSouth-to-NorthWaterDiversionProject.Theirsafeoperationiscloselyrelatedtothesafetyandthewaterdiversionefficiencyofthewholeprojectduringaniceperiod.Theiceaccumulationprocessattheinletoftheinvertedsiphonismodeledunderarealicecondition,andthenthehydraulicconditionsoftheicejampreventionareconfirmed.Accordingtotheexperimentalresultsandthedesignsizesoftheinvertedsiphons,thedetailedsafewaterdiversiondischargeandtheoperationalwaterlevelarestudied.Analysisresultsoftheseinvertedsiphonsprovidereferencesforthesafeoperationandthereasonableregulationsduringtheiceperiod.