简介：Thegeneticdiversityanddifferentiationof6mudcrabScyllaserratapopulationsfromsoutheasternChinaareinvestigatedusingallozymeelectrophoresis.Themeannumberofallelesperlocuspopulationis1.3±0.1;thepercentageofpolymorphiclociperpopulationis27.3;theobservedheterozygosityrangesfrom(0.195±0.083)to(0.241±0.090)andtheexpectedheterozygosityrangesfrom(0.105±0.043)to(0.131±0.047).Thecoefficientofgenedifferentiationamongpopulationsislow(Fst=0.032),indicatingthatonly3.2%ofthetotalgeneticdiversitycomesfrominter-population,whiletheremaining96.8%comesfromintra-populationdifferences.Thegeneticdistanceamongpopulationsis0.000～0.008(theaverageis0.002).Geneflowamongthepopulationsislarge(Nm=7.56).Geneticstructureisverysimilaramong6Scyllaserratapopulations.

简介：PCR-DGGEapproachwasusedtoanalyzebacterialdiversityinthebottomsectionofsevenarcticseaicesamplescolletedfromtheCanadaBasin.Thirty-two16SrDNAsequenceswereobtainedfromprominentDGGEbands.Theclosestrelativesofthesesequencesarefoundtobethoseofcultivatedorunculturedbacteriafromantarcticorarcticseaice.Phylogeneticanalysisclusteredthesesequencesorphylotypeswithinα-proteobacteria,γ-proteobacteriaandCFB(cytophaga-flexibacter-bacteroides)group.Sequencesbelongingtoγ-proteobacteriaweredominantandmembersoftheCFBgroupwerehighlyabundant.ItwassuggestedthattheCFBgroupwastherepresentativeofthebottomsectionofseaicesamples.

简介：Thepaperdescribestheproposedmodelsofdiamondformationbothinmeteoritesandinkimberliteandlamproitebodies.metamorphiccomplexesandexplosive-ringstructures('astroblemes'),Thediamonddistributioninmeteorites(chondrites,ironmeteoritesandureilites)isrestrictedtotaente-kamasitephase.Thediamondgenerationhereistiedupwiththefirststageofevolutionoftheplanets,Thisstageischaracterizedbyhighpressureofhydrogen.leadingtotheformationoftheplanetenvelope,Thesecondstageofplanetevolutionbeganwiththeprogressiveimopoverishmentoftheiratmospheresinhydrogenduetoitspredominantemissionintothespaceandtoprogressivedevelopmentofoxidativeconditions.Themodelappearstohaveprovedtherelictnatureofdiamondmineraolizationinmeteorites.Diamondandotherhigh-pressureminerals(its'satellites')werecrystallizedwithoutanyexceptionintheearlyintratelluricstagesofperidotiteandeclogite-pyroxenitemagmaevolutionjustbeforethemagmaintrusionintothehigherlevelsofthemantleandcrustwherediamondisnotthermodynamicallystable,Theultramaficintrusivebodies(bearingrichrelictdiamonds)inthedaseofaplatformpaaeartobethesubstratafortheformationofkimberlite-lamproitemagmachambersasaresultofmagmaticreplacement.Themodelexplainsthepolyfacialnatureofdiamondiferouseclotgites,pyroxenitesandperidotitesanddiscussestheprocessofinheritanceoftheirdiamondmineralizationbykimberlitesandlamproites.Dimondoproductivityofmetamorthiccomplexesisoriginatedbytheinheritanceoftheirdiamondsfromtheabove-mentionedprimarydiamondiferousrocks.Largediamondiferousexplosive-ringstructureswereformedbyhigh-energyendogenicexplosionoffluidwhichcamefromtheEarth'score.Thishighenergydiffersendogenicimpactogenesisfromexplosivevolcanism.Itproceedsatveryhightemperaturetocreatediaplecticgalsses(monomineralpseudomorphs)-theproductofisochoricmelting,atthepressurehighenoughforth

简介：Thispaperpresentsanovelapproachtofeaturesubsetselectionusinggeneticalgorithms.Thisapproachhastheabilitytoaccommodatemultiplecriteriasuchastheaccuracyandcostofclassificationintotheprocessoffeatureselectionandfindstheeffectivefeaturesubsetfortextureclassification.Onthebasisoftheeffectivefeaturesubsetselected,amethodisdescribedtoextracttheobjectswhicharehigherthantheirsurroundings,suchastreesorforest,inthecoloraerialimages.Themethodologypresentedinthispaperisillustratedbyitsapplicationtotheproblemoftreesextractionfromaerialimages.

简介：Diversityofbacteriawasstudiedindeep-seasedimentsfromtheShikokuBasinintheNorthwestPacificOceanbyPCR,RFLPandsequenceanalysisof16SrDNAandcomparingwithGenbankdatabase.BasedontheRFLPprofilegenerated,77clonesfromthe16SrDNAlibraryweredividedinto27types.Phylogeneticanalysisshowedthatthe27independentclonesfellintofourgroups:Proteobacteria(62.96%),Chloroflexi(14.81%),Planctomycetes(14.81%)andAcidobacteria(7.41%).Amongallsequencedclones,6wererelatedtothesulfurorsulfatemetabolismbacteriaandtheresultsalsodemonstratedthatsomebacteriaindeep-seasedimentshadrelationtomatter-energycirculation.

简介：1.Tcetonicandmagmaticactivizationproeesscs(tcetonicandthermalregenerationofancientbasc-mentordiwa)occurrcdinPhancrozoicanda1soil1Prccan1briantimc.Activizationrcgin1csbccamcap-parcntalrcadyinArchcantimcandthcirimportanccsignificantlyincrcascdduringLatcProtcrozoicpcri-odwhcnmanypartsofArchcancrustwcrc

简介：Forskarntypedeposits,therearetwokindsofskarns,skarnformedbyfiltrating-diffusingmetasomatismandveinskarnformedbyfilling.Theveinskarn,discussedthispaperandconsideredtobemagmaticgenesis,ischaracterizedby:(1)occurringasveinwithdistinctboundarieswithcountryrocks,yetjustthesameeveninmarbleeasytobereplaced;(2)composedofamineralassemblagesimi-lartothatofgranite,containingpegmatiteaswellascoarseskarnmineralpockets,andsometimestran-sitedwithdikerocks;(3)clearcrystallinefeatureofdeposition;(4)sideronintietexture;(5)showingvesicular,bean-likeandflowstructures;(6)verycommonliquidimmiscibility;(7)verticalzoningofgravitationaldifferentiationcausedbyvolatileconcentrationupwards;(8)associatedandtransitedwithiron-copperorebodiesofmagmaticgenesisandtungsten-bearingquartzveinsofsilicatemagmaticgene-sisrichinvolatile;(9)meltinclusions.Twooriginsofskammagma,originatedbyassimilationofsilicatemagmaatitsemplacem

简介：ThenewspreadingconchosporesotPorphyrayezoensis,P.haitanensisandP.katadaivar.hemiphyllaareinducedbyN-Methy-N'-Nitro-N-Nitrosoguanidine(NG),astrongmutagentoinducethemutantofchromatophore.Itisshowedthat(1)nomutantshavebeeninvestigatedinallcontrolgroup.(2)TheconchosporesofallthethreespeciesofPorphyraareeasytobeinducedbyNGfortheyareinthestageofbreeding,Inthelowestdose(10μg/mL)ofthisexperiment,themutantrateofP.yezoensisisupto57.9%,thatofP.haitanensis30.7%andthatofP.katadaivar.hemiphylla51.7%.(3)Themutantratecannotincreaseobviouslybyincreasingthereagentconcentrationorprolongingtheinductiontime.Withinthescopeofexperiment,theinducementeffectsofthreespeciesofPorphyraaremuchsimilar,andthemutantrateisnear50%.TheoptimuminductionconcentrationofNGis10μg/mL,andtheoptimuminductiontimeis30minutes.

简介：Chinaisamongthefewcountriesrichinpytophyllite.ItisinferioronlytoJapanandSouthKoreainprovedorerescrvesandranksthirdintheworldinperspectivereservesPyrophylliteoccurrencesinSupportcdbytheNaturalScienccFoundationofHunanProvinceandthcDirectorFoundationofChangshaInstituteofoeotectoniCS,ACademiaSinica.Chin

简介：TheyoungthalliofPorphyrayezoensisandP.haitanensisareinducedbyN-Methy-N'-Nitro-N-Nitrosoguanidine(NG),astrongmutagentoinducethemutantofchromatophore.Itisshowedthatnomutantshavebeeninvestigatedinallcontrolgroups,whileintheinducedgroups,itiseasytofindmutantcellsormutantcellmassesinthethallus.ThepigmentationmutantsmaybetheresultofNGinducement.Themutantrateincreasesobviouslywiththemutagenconcentrationorbyprolongingtheinductiontime.Withinthescopeofexperiment,theinducementeffectsofPorphyrayezoensisareraisedfrom11.2%to28.7%,andthoseofP.haitanensisfrom10.1%to20.2%.Accordingtoourexperiments,theamountofmutantcellsinthesameareadoesnotincreasewiththeinductionintensityTheamountofmutantcellsineverygroupofinducementofbothspeciesofPorphyrachangesverylittlewiththefixedfieldscheckmethod.Thelowestdose(25μg/mL)ofthisexperimenthasahighmutantrate.Themutantrateshowsthepercentageofmutantcellsinallthesurvivedcells,whiletheamountofmutantcellsreflectstheeffectofinducement.ThustheoptimuminductionconcentrationofNGis25μg/mL,andtheoptimuminductiontimeis30minutes.

简介：Anattempthasbeenmadetogiveaninsightintothegenesisofenclavesingranitesbymathematicallyquantitativemethods.Aftersomededuction,thequantitativemodelsoftraceelementsforthegeneticallydifferentenclaveshavebeenestablished,includingthoseforrestites,segregationschlierens,enclavesformedoutofsolidifiedmargins,andenclavesderivedfromthemixingofdifferentmagmas.Thesemodelshavebeentestedandproventobevalidandreliable.Theconclusionsinferredfromthesequantitativemodelsareconsistentwithfieldobservationsandpetrological,mineralogicalandgeochemicalevidence.

简介：Onthebasisofthecarbonisotopiccompositionsofmethane(CH4)anditshomologuesandthedifferencesinisotopicvaluesforCH4andethane(C2H6)andthecorrelationandcompositionalchar-acteristicsofhydrocarbongases,theauthorhasproposedageneticclassificationofnaturalgasesintheoil-gaszone.Theyareclassifiedasbiogeneticandabiogeneticgasesintermsofthetypesofhydrocarbon-generatingprecursors(orparentmaterials)andtheirthermalevolutionstages.Biogeneticgasescanalsobefurtherdividedintotwoseries:biochemicalandthermochemicalgases,withthelat-terformedatdifferentevolutionstages.Gasesgeneratedfromtype-Iand-II1organicmatterarecalledoil-seriesgases,thosefromtype-III,coal-series,andthosetype-II2,mixture-typegases.Gasesgeneratedfromtwoormorethantwotypesofprecursorsarecalledmixture-sourcegases.Accordingtothosementionedabove,naturalgasesfromthemajoroil-gaspoolsintheSichuanBasinhavebeendiscriminantlyanalyzed,andtheresultsareconcordantwiththedistributionandde-velopmentofhydrocarbon-sourcerocksaswellaswiththeircharacteristics,indicatingaprospectiveapplication.

简介：Tungstenminerals(scheeliteandwolframite)fromtwogenetictypesofgranitoidsshowsignificantdif-ferencesinREEdistribution,probablyduetodifferentmaterialsourcesandorigins.Tungstenminer-alsingraniteporphyryofthecrust-mantlesourcearerelativelyhighin∑REE(1884ppmonaverage).∑Ceisrichrelativeto∑Yand∑Ce/∑Yisrelativelyhigh(>1).Thechondrite-normalizedREEdistributionpatternsarecharacterizedbyagroupofrightward-inclinedcurves.Tungstenmineralsinquartzveinsintrudingthegranitesofcrustoriginhavelower∑REE(335ppmonaverage).∑Yisrichrelativeto∑Ceand∑Ce/∑Yisrelativelylow(<1).Thechondrite-normalizedREEdistributionpatternsarecharacterizedbyagroupofleftward-inclinedcurves.SotheREEdistributionpatternscanbeusedtodiscriminatethesourcesofrock-andore-formingmaterialsandthegenetictypesofWdepositssoastoprovidecluestooreprospecting.

简介：

简介：联合适应收缩在有明显的垂直传导力的成像的可行区域的基因算法微分，我们转换了TEM传导性的薄层。倒置的结果证明由在可行区域的适应收缩，计算速度加速，计算精确改善。到某个程度，在这个方法，我们克服短暂电磁的发出声音等价和减少的等价范围。有前面的曲线的转换结果的比较清楚地证明我们能想象传导性的薄层。关键词短暂电磁的方法-基因算法-倒置-明显的纵的传导力-并且传导性的薄层首先写作在Chang鈥檃n的教授李秀大学。他从长春地质学学院在地球物理的探索从Xi鈥檃n地质学学院和BS(1982)在应用地球物理收到了M.Sc(1989)。他出版了超过30份报纸。他从事理论的研究和短暂电磁的领域的申请。他现在正在追求ph。在Xi鈥檃n交通大学的D。

简介：ZooplanktonsurveyswerecarriedoutonNovember2-3andDecember8-10,2001at12stationsintheNanWanBayofTaiwan,China.Altogether92quantitativezooplanktonsampleswerecollectedfromsubsurfacewaterandbottomwaterlayerswithtwoconicalplanktonnets(180cminlength,45cminopeningdiameter,333μmand200μminmeshsize).Atotalof31speciesofSiphonophoreswereidentified,amongthem7speciesarenewrecordsinthewatersaroundTaiwanIsland,ofwhichRocaceacymbiformisisanewrecordinChina.DominatedbyChelophyesappendiculata,Bassiabassensis,Diphyesbojani,Diphyesdispar,AbylopsiseschscholtziandChelophyescontorta,thesespeciesaccountedforover76%and63%ofthetotalabundanceinNovemberandDecember.ThespeciesnumberandSiphonophoresabundanceinDecember(25species,1.99inds/m3)weremorethanthoseinNovember(19species,0.438inds/m3),andtheyweremoreinthesurfacewaterlayerthaninthebottomlayeratmostsamplingstations.Inearlywinter,theoffshorehighsalinitywatermasswasamainfactorinfluencingthedistribution.ThesamplingefficiencyfortwoplanktonnetsisdiscussedandtheseasonalvariationofspeciesnumberandabundanceintheNanWanBayiscomparedwiththatintheneighboringwaters.

简介：Thispaperintegratesgeneticalgorithmandneuralnetworktechniquestobuildnewtemporalpredictinganalysistoolsforgeographicinformationsystem(GIS).ThesenewGIStoolscanbereadilyappliedinapracticalandappropriatemannerinspatialandtemporalresearchtopatchthegapsinGISdataminingandknowledgediscoveryfunctions.ThespecificachievementhereistheintegrationofrelatedartificialintelligenttechnologiesintoGISsoftwaretoestablishaconceptualspatialandtemporalanalysisframework.And,byusingthisframeworktodevelopanartificialintelligentspatialandtemporalinformationanalyst(ASIA)systemwhichthenisfullyutilizedintheexistingGISpackage.Thisstudyofairpollutantsforecastingprovidesageographicalpracticalcasetoprovetherationalizationandjustnessoftheconceptualtemporalanalysisframework.

简介：ThereareobviousdifferencesinthemineralassemblageandmetamorphicP-TconditionsbetweentheeclogitesfromthenorthernandsouthernpartsoftheeasternDabieMountains.ThosefromthenorthernpartofthemountainsaredevelopedinAlpineperidotiteandgneiss.Theyhaveamineralassemblageofgarnet+diopsidewithnoquartz,andwereformedattemperaturesof600℃-740℃.Thosefromthesouthernpartaredevelopedingneissandmarble.Theyconsistofgarnet+omphacite+lessquartzandweremetamorphosedattemperaturesintherangeof650°-800℃.Thesedifferencessuggestthattheformermaybeformedduringthemetamorphismofthedeepsubductedoceaniccrust,whereasthelattermaybegeneticallyrelatedtothesubductionofthecontinentalcrustinthisarea.

简介：TheNandan-Hechimetallogeneticbeltisthemostimportanttin-polymetallicproducingdistrictinChina,andisthelocationoftheDachangsuper-largetindeposit.Basedonthedetailedfieldinvestigationandisotopicdata,thestagesofmagmaticactivityintheNandan-Hechimetallogeneticbelthavebeenlinedoutinthispaper.Throughthestudyaboutthegeochemicalcharacteristicsofdifferentgranites,andbyusingω(Al2O3)-ω(SiO2),ω(TFeO)/[ω(TFeO)+ω(MgO)]-ω(SiO2),AFM,ACFandRb-Yb+Ta,Rb-Y+Nb,Ta-Yb,Nb-Ydiscriminationdiagramsincombinationwithregionalgeologicalsettinganalysis,theauthorscarriedoutanalysesaboutthestructuralenvironmentfortheformationofthegranites,anddiscussedthestructuralenvironmentanddynamicsettingforthelargescalemineralizationinthisarea.OurstudyindicatesthatthemajorityofthegranitesinNandan-HechimetallogeneticbeltbelongtothePOGtype,whilethelaterstagealaskitebelongstotheRRG+CEUGtype.Thegraniteswereformedatthestageofstructuraltransformationfrompostorogenicphasetointraplatesetting.Butthemajorstructuralenvironmentischaracterizedbysteadyregionalextension.Theformationageforthegranitescoincideswiththetimeforthistransformation,andthistranslationenvironmentisfavoredforlarge-scalemetallogenesis.

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