简介：Thispaperextendstheresourcedragstudiesbyempiricallyinvestigatinghowspatialfactorsaffecttheregionaleconomicgrowth.Usingspatialpaneleconometricmodels,thispaperestimatesthedraggingeffectofenergyresourcesoftheYangtzeRiverDeltametropolitanareas.WefindthatthegrowthdragofenergyintheYangtzeRiverDeltaisabout6%onaverage,whichmeansthatenergyconstraintsdecreasetheeconomicgrowthby6%annually,higherthanthenationallevelthathasbeenpreviouslymeasuredintheliterature.Thisresulthastakenintoaccounttheimpactofneighboringcities’economicdevelopment,soastoobtainamoreaccurateestimate.Basedonthesemeasurementresults,weproposesomepolicyrecommendations.

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简介：Journalevaluationisacompliatedengineeringsystem,howtoevaluateacademicjournalsmorescientificallyinscientificmethodshavebecomesaproblemofgreatconcerns.Thispaperpresentsattributemathematicalmodelforcomprehensiveindexsystem'qualityevaluationfornaturalscienceacademicjournals,aimingtomakecomprehensiveindexsystem'qualityevaluationforacademicjournalsmoreobjectiveandreasonablecomparedwithotherquantitativeevaluationways.

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简介：瞄准使用自然地存在的巨大的数量的一个协议为nanostructured浪费例如落叶，果皮和鸡蛋壳合成材料被建议。在这研究，把自然地存在的膜用作支持的一条绿合成线路为nanostructured和多孔的金属的合成被开发--或金属氧化物碳合成电影。不同金属性的离子(公司2+,Ni2+,Fe3+,Mn2+或Cu2+)能容易在Co/C的形成被吸附到鸡蛋膜和跟随的锻烧过程结果上，Ni/C，Fe3O4/C,MnO/C或Cu/Cu2O/CuO/C合成电影。电气化学的研究证明如此的合成电影将在精力领域里有潜在的应用程序。这个方法将为化学合成提供一个一般绿概念并且对全球持续未来有益。

简介：Turbulentreactingflowsinagenericswirlgasturbinecombustormodelareinvestigatedbothnumericallyandexperimentally.Intheinvestigation,anemphasisisplacedupontheexternalfluegasrecirculation,whichisapromisingtechnologyforincreasingtheefficiencyofthecarboncaptureandstorageprocess,which,however,canchangethecombustionbehavioursignificantly.Afurtheremphasisisplacedupontheinvestigationofalternativefuelssuchasbiogasandsyngasincomparisontotheconventionalnaturalgas.FlamesarealsoinvestigatednumericallyusingtheopensourceCFDsoftwareOpenFOAM.Inthenumericalsimulations,alaminarflameletmodelbasedonmixturefractionandreactionprogressvariableisadopted.Asturbulencemodel,theSSTmodelisusedwithinaURANSconcept.Computationalresultsarecomparedwiththeexperimentaldata,whereafairagreementisobserved.

简介：Thelowfrequencycyclicaltransientnaturalconvectioninacubeenclosurewithaninternalisolatedverticalheatedplatewasinvestigatedexperimentally.Acomputer-aidedexperimentalsystemwasdesignedtogeneratethecyclicalheatingpowerinputandalsousedfordatareduction.Theeffectsofthecyclicheatingpowerinputamplitude(from0to8W)andfrequency(form1/5400s^-1to1/600s^-1)aswellastheper-cycletime-averagepowerinput(from8to24W)onthetransientandtime-averageNusseltnumberwereparametricallystudied.Itwasfoundthatforsuchcyclicaltransientnaturalconvectionwithlowfrequency,theplateheatingpowerinputamplitudeandfrequencyhavelittleeffectsonthetime-averageNusseltnumberaslongasthecyclicaltime-averageheatingpowerinputremainsthesame,althoughthetransientNusseltnumbermaybesignificantlyaffected.Therefore,themodifiedGrashofnumberbasedontheplateaverageheatfluxcanbeusedtocharacterizethetime-averageheattransferprocess.Theplatetime-averageNusseltnumberisabout15%lessthantheinfinite-spaceNusseltnumber,Thelocationoftheisolatedplateinenclosuredoesnotappreciablyinfluencethetime-averageheattransfercharacteristicsoftheplate.

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简介：TheGarouaZoneinNorthCameroon,thesubjectofthisstudy,isknowntohaveundergonetectonicmovementsduringtheCretaceous,butthezone’sstructuraldataremainpoorlyknown.ThisstudyexploitstheBougueranomalytoimproveknowledgeofGarouatectonicsstructures.Inordertocharacterizethesestructures,twomethodsareused:Euler’sdeconvolutionmethodandthemethodofthehorizontalgradientoftheverticalderivative.SuperpositionoftheEuler’ssolutionsmapforindexN=1withthemapfromthehorizontalgradientoftheverticalderivativemethodallowsdeterminationofgravimetriclineaments,interpretedasfaultsoraslinearcontacts,fromwhichwededuceastructuralmapofthestudyarea.Basedonthismap,weidentifysixteenlineaments,ofwhichwecounteightaslinearcontactsandeightasfaults.Amongthefaults,wedenoteoneofdepthbetween4and8km,fivefaultsofdepthrangingbetween8and13km,andtwofaultsofdepthsbetween13and36km.Analysisofthesefaultsshowsthatthesevendeepestfaultsmightpresentanaturalriskinourstudyarea.Forpurposesofcivilprotection,suchdeepfaultsshouldbemonitoredandtakenintoconsiderationintheimplementationoflargepublicworks.Thestructuralmap,establishedhereinfromdataonthein-depthextensionofeachfault,thusincreasesscientificknowledgeintheareathatcanbeusedtositepublicworksinwaysthatreducerisk.

简介：Theboundaryintegralequation(BIE)ofdisplacementderivativesisputatadisadvantageforthedifficultyinvolvedintheevaluationofthehypersingularintegrals.Inthispaper,theoperatorsδijandεijareusedtoactonthederivativeBIE.Theboundarydisplacements,tractionsanddisplacementderivativesaretransformedintoasetofnewboundarytensorsasboundaryvariables.AnewBIEformulationtermednaturalboundaryintegralequation(NBIE)isobtained.TheNBIEisappliedtosolvingtwo-dimensionalelasticityproblems.IntheNBIEonlythestronglysingularintegralsarecontained.TheCauchyprincipalvalueintegralsoccurringintheNBIEareevaluated.AcombinationoftheNBIEanddisplacementBIEcanbeusedtodirectlycalculatetheboundarystresses.ThenumericalresultsofseveralexamplesdemonstratetheaccuracyoftheNBIE.

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简介：Thechangesofmicrobialbiomasscarbon(MBC)andnitrogen(MBN)andmicrobialcommunityinthetopsoiloftheabandonedagriculturallandonthesemi-aridLoessPlateauinChinaduringthenaturalsuccessionwereevaluatedtounderstandtherelationshipbetweenmicrobialcommunityandsoilproperties.MBCandMBNweremeasuredusingfumigationextraction,andmicrobialcommunitywasanalyzedbythemethodoffattyacidmethylester(FAME).ThecontentsoforganicC,totalN,MBC,MBN,totalFAME,fungalFAME,bacterialFAMEandGram-negativebacterialFAMEatthenaturalsuccessionsiteswerehigherthanthoseoftheagriculturalland,butlowerthanthoseofthenaturalvegetationsites.TheMBC,MBNandtotalFAMEwerecloselycorrelatedwithorganicCandtotalN.Furthermore,organicCandtotalNwerefoundtobepositivelycorrelatedwithfungalFAME,bacterialFAME,fungal/bacterialandGram-negativebacterialFAME.Naturalsuccessionwouldbeusefulforimprovingsoilmicrobialpropertiesandmightbeanimportantalternativeforsustainingsoilqualityonthesemi-aridLoessPlateauinChina.

简介：Polyaniline(平底锅)敏化nanocrystallineTiO2composites(TiO2/PAn)成功地被准备并且为染料甲又蓝色(MB)的降级用作有效光催化剂。结果证明那个平底锅能高效地敏化TiO2，合成光催化剂能被两个都吸收紫外、可见的光激活(λ：190800nm)，而纯TiO2仅仅吸收了紫外光(λ<380nm)。在自然的光的照耀下面，MB能比在TiO2上在TiO2/PAncomposites上更高效地被降级。而且，它能被简单沉积容易与答案分开。

简介：ThemainpurposeofthisstudyistoputforwardareasonableideaofthegeneralprotectionforSingingSandMoun-tainandCrescentMoonSpring,arareanduniquedesertwonder,andofsustainabletourismdevelopmentbasedontheresearchontheecologicalenvironmentaround.Methodsofdocumentation,casestudyandcomparisonwereemployed.Finally,aimingatsolvingtheproblemsofnaturalenvironmentandthoseexistingaftertheexploitationofSingingSandMountainandCrescentMoonSpringtheauthorputsforwardthreemeasures:thecom-prehensivetreatmentforCrescentMoonSpring(broadeningre-sourcesofwaterandreducingexpenditures,checkingthede-creasingdepthofCrescentMoonSpring,andimprovingthegeo-graphicalenvironment),thegeneralprotectionenvisionsforSingingSandMountainandCrescentMoonSpringandestablish-ingadynamicmonitoringandearly-warningsystemofregionalecosystem.

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简介：FamilyoutcrossingratesofPinuscaribaeavar.caribaeapopulationsthatdifferedinoriginandmanagementwereestimatedbyusingisozymemarkers.Thefamilyoutcrossingrateswereestimatedby(1)fixingtheprobabilityofpollengenefrequency(p);(2)allowingpollengenefrequencytovaryamongfamilies.Theestimatesoffamilyoutcrossingratesforallthepopulationsvariedwidelyamongfamilies(clonesoftheseedorchard),rangingfrom0.39to2.0.Theaveragefamilyoutcrossingratesofbothm...

简介：在考虑地表流边界条件情况下，森林对降雨径流和泥沙的影响是一个非常复杂的过程．本文给出了水源保护林在自然坡面尺度上对径流泥沙影响的初步试验研究结果，森林在自然坡面尺度上对１９９７年７月３１日至８月１日降雨过程的洪峰流量消减率达４５５９％，洪水总量的消减率为６．８％，森林坡面径流总量为９８０．７８ｍ３，荒草坡为１０５２２３ｍ３．森林对１９９６年７月３０日降雨过程的洪峰流量消减率为１７．９５％，森林坡面的径流总量为１５．０８ｍ３，荒草坡为１８．３８ｍ３．从１９９６年森林对降雨径流较低的消减率看，降雨量与降雨强度对径流泥沙有很大的影响．

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简介：IthasbeenrevealedthatpolyⅠ:CisapotentstimulatorforNKcells,whichcaninduceNKcellrapidactivationandpreferentialaccumulationintoliver.However,theprocessmediatingtheinfluxofNKcellsremainsobscure.Inthisstudy,wefoundthatpolyⅠ:CadministrationincreasedtheportionandabsolutenumberofNKcellsinliver,butlargelydecreasedthoseinspleen.Therewerenoobviouschangesoftheselymphocytesinotherimmuneorgans.TheresultsfromsplenicadoptivetransferandsplenectomyshowedthattherecruitedspleenNKcellscontributedtotheaccumulationofNKcellsinliver,andthisprocesswasregulatedbytheproductionofchemokinesandthepresenceofTcells.Thisinvestigationwillhelptounderstandtheenhancedimmunecellrecruitmentinliveruponviralinfection.

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