简介：ThereisalownutrientlevelintheAoshanBay.InJune1999,thechemicaladjustmentandcontrolexperimentwasmadeintheAoshanBay.Followingtractsinvestigationwascarriedoutbeforetheexperimentandonthe1st,2nd,4th,5th,6thand45thday/aftertheexperiment.Whilethevarianceofamountofphytoplankton,thereplacementofsuperiorspeciesandthespeciescompositionofphytoplanktonwereresearched.TheresultsshowthattheamountofphytoplanktonintheAoshanBayrisesgraduallyaftertheexperiment.CeratiummacrocerosCleveofpyrophytawasthedominantspeciesbeforetheexperiment,itsdominantindexwas37.7%.Sixdaysaftertheexperiment,itsdominantindexdroppedto17.6%.MeanwhilethedominantindexofAsterionellajaponicsCleverosefrom7.1%to39.2%,itbecamethefirstdominantspecies.Forty-fivedaysaftertheexperiment,theamountofphytoplanktonintheAoshanBaywas5.15to137.32timesmorethanthatin1997.

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简介：Supposetherearetwoelectricitytesters,AandB(FigureA).AndametalcylinderCwhichisalmostclosed(calledFaradayCylinder)isfixedtotesterB,makingbothtesterBandcylinderCcharged.Asaresult,thealuminiumfoilontesterBopens.

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简介：Triptolide(1)gave2-9undervariousconditionsspecifiedinthetext.

简介：TEACHER:Whatisthechemicalformulaforwater?SARAH:'HIJKLMNO'!!TEACHER:Whatareyoutalkingabout?SARAH:Yesterdayyousaidit'sHtoO!

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简介：Inrecentyears,pulsemagneticstimulationtechniquehasbeenpaidmoreandmoreattentionbythepeopleengagedinnoninvasivediagnosisandtherapywork.Comparedwithelectricstimulation,ithastheadvantagesofbeingnoninvasive,pain-lessandsafe,andhasbeenusedtoexamineandtreatdisordersofnervesystemsuc-cessfully.Applicationinotherfieldsisstillachallengetomanyresearchers.Wehave

简介：ThemaingoaloftheHyperCP(E87)experimentatFermilabistosearchforCPviolationinΞandΑdecaysatthe-10^-4level.Thislevelofprecisiondictatesadatasampleofoverabillionevents.Theexperimentcollectedabout231billionraweventsonabout30,0005-GBtapesintenmonthsofrunningin1997and1999,Inordertoanalyzethishugeamountofdata,thecollaborationhasreconstructedtheeventsonafarmof55dual-processorLinux-basedPCsatFermilab.AsetoffarmtoolshasbeenwrittenbythecollaborationtointerfacewiththeFarmBatchSystem(FBSandFBSNG)[1]developedbytheFermilabComputingDivision,toautomatemuchofthefarmingandtoallownonexpertfarmshifterstosubmitandmonitorjobsthroughaweb-basedinterface.Specialcarehasbeentakentoproducearobustsystemwhichfacilitateseasyrecoveryfromerrors.Thecodehasprovisionsforextensivemonitoringofthedataonaspill-by-spillbasis,asisrequiredbytheneedtominimizepotentialSystematicerrors.About36millionplotsofvariousparametersproducedfromthefarmanalysiscanbeaccessedthroughadatamanagementsystem.Theentiredatasetwasfarmedinelevenmouths,oraboutthesametimethatwastakentoacquirethedata.Wewilldescribethearchitectureofthefarm.ourexperienceinoperatingit,andshowsomeresultsfromthefarmanalysis.

简介：Themaingoalofdivertorphysicsistodeterminetheedgeplasmatemperature,density,powerdispersal,powerasymmetrybetweeninwardtargetandoutwardone,thecontrolabilityofimpurityandneutralparticles.Aboveparameterswillchangewithplasmadensityorheatingpower.Theycanbedividedinto3regimes:linearregime,highrecyclingoneanddetachedone.

简介：Basedontherainbow-ladderapproximationoftheDyson-Schwingerequationsandtheassumptionoftheanalytieityofthefermion-bosonvertexintheneighborhoodofzerochemicalpotential(μ=0)andneglectingtheμ-dependenceofthedressedgluonpropagator,weapplythemethodin[Phys.Rev.C71(2005)015205]ofstudyingthedressedquarkpropagatoratfinitechemicalpotentialtoprovethatthegeneralfermion-bosonvertexatfiniteμcanalsobeobtainedfromtheoneatμ=0byasimpleshiftofvariables.Usingthisresultweextendtheresultsof[Phys.Lett.B420(1998)267]tothesituationoffiniteehemicalpotentialandshowthatundertheapproximationswehavetaken,theGe11-MannOakesRennerrelationalsoholdsatfinitechemicalpotential.

简介：Hypericin是主要从属于节Euhypericum和凯勒的分类的Campylosporus的类Hypericum的工厂提取的最重要的phenanthoperylenequinones之一。普遍注意到抗病毒并且hypericin的反肿瘤性质刺激了化学合成的调查和这唯一的混合物的生合成。然而，合成策略为器官、生物的化学家是挑战性的。在这评论，在在过去的十年的全部的合成，半合成，和生合成的特定的重要进展被总结。

简介：一个小小的乒乓球被人们放到了世界上最长的河流——尼罗河的源头，开始了它的征程。也许这个实验不会对人们的生活有所改变。可是它却从另一方面证明了一些东西。是什么呢？

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简介：BasedontheGlobalRegionalAssimilationandPredictionSystem-TropicalCycloneModel(GRAPES-TCM),anensembleforecastexperimentwasperformed,inwhichTyphoonWiphaduringtheperiodimmediatelypriortolandfallwasselectedforthestudyandthebreedingofgrowingmode(BGM)methodwasusedtoperturbtheinitialconditionsofthevortexfieldandtheenvironmentfield.TheresultsoftheexperimentindicatethateachmemberhadadifferentinitialstatusinBGMprocessingandtheyshowareasonablespreadamongmembersalongwiththeforecastphase.Changesinthelarge-scalefield,thermodynamicstructure,andspreadamongmemberstookplacewhenWiphamadelandfall.Thesteeringeffectofthelarge-scalefieldandtheinteractionbetweenthethermodynamicsandthedynamicsresultedindifferenttracksofthemembers.Meanwhile,theforecastuncertaintyincreased.Insummary,theensemblemeandidnotperformaswellasthecontrolforecast,buttheclustermeanprovidedsomeusefulinformation,andperformedbetterthanthecontrolinsomeinstances.Thepositionerrorwas34kmfor24hforecast,153kmfor48hforecast,and191kmfor66hforecast.Thestrikeprobabilitychartqualitativelydescribedtheforecastuncertainty.

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