简介：Theseasonalvariabilityofthesignificantwaveheight(SWH)intheSouthChinaSea(SCS)isinvestigatedusingthemostup-to-dategriddeddailyaltimeterdatafortheperiodofSeptember2009toAugust2015.TheresultsindicatethattheSWHshowsauniformseasonalvariationinthewholeSCS,withitsmaximaoccurringinDecember/JanuaryandminimainMay.Throughouttheyear,theSWHintheSCSisthelargestaroundLuzonStrait(LS)andthengraduallydecreasessouthwardacrossthebasin.Thesurfacewindspeedhasasimilarseasonalvariation,butwithdifferentspatialdistributionsinmostmonthsoftheyear.FurtheranalysisindicatesthattheobservedSWHvariationsaredominatedbyswell.Thewindseaheight,however,ismuchsmaller.ItisthethelargestintworegionssouthwestofTaiwanIslandandsoutheastofVietnamCoastduringthenortheasterlymonsoon,whilethelargestinthecentral/southernSCSduringthesouthwesterlymonsoon.Theextremewaveconditionalsoexperiencesasignificantseasonalvariation.InmostregionsofthenorthernandcentralSCS,themaximaofthe99thpercentileSWHthatarelargerthantheSWHtheoreticallycalculatedwiththewindspeedforthefullydevelopedseasmainlyappearinAugust–November,closelyrelatedtostrongtropicalcycloneactivities.Comparedwithpreviousstudies,itisalsoimpliedthatthewaveclimateinthePacificOceanplaysanimportantroleinthewaveclimatevariationsintheSCS.

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简介：1IntroductionTheMaozuPb–Zndeposit,locatedintheNortheastofYunnanProvince,southwestChina,isatypicalcarbonate-hosteddepositintheNortheastofYunnanPb–Znmetallogenicprovince.Fluoriteisthemaingangue

简介：与构造进化结合了，一个多同位素的方法(D，18O，87Sr/86Sr和14C)并且hydrochemistry数据被用来在Guanzhong盆学习地热的水的起源和分类。当接受时，Xianli梯田的地热的水首先来自西北方向的学习表演再装。Xian城市里的地热的水的小数量供应来源从Qinling山和主要供应来源来自西方方向，而是地热的水Changan区域主要从Qinling接受供应山。基于地热的环境是开的，水岩石相互作用的度，和地热的水的起源，学习区域的地热的水能被划分成四种类型：A，Gushi消沉的地热的水，完美的关上的热环境和重要水岩石相互作用，属于剩余沉积的水起源；B，Xianyang城市的地热的水，好关上的环境和相对重要的水岩石相互作用，属于剩余与石块沥滤混合的沉积的水起源水；C，Xian城市的地热的水，半关上的环境和某水岩石相互作用，属于的石块沥滤水起源；D，Changan区域的地热的水，开的环境并且与现代降水混合了，属于的石块沥滤水起源。

简介：基于井核心，薄节和FESEM的观察，把指示物，水库特征和S字4-Esx的页岩油丰富的控制因素与X光检查衍射，物理性质测试和geochemical相结合在Jiyang消沉的3页岩被详细说明分析。研究证明碳酸盐和泥土矿物质在页岩被统治。根据三角图表，TOC内容(2%和4%)，碳酸盐和泥土矿物质，九张岩相被识别了。水库空间类型富于页岩，在哪个，把压成薄片的破裂，再结晶intracrystalline毛孔和器官的毛孔是高质量的水库空格。页岩油丰富被生产烃的潜力和水库能力主要决定。烃--生产能力被器官的地球化学指示物，为学习区域的特别TOC内容，和器官富人的页岩的厚度控制。水库能力被岩相，TOC内容和结构的活动主要影响。另外，页岩采油被页岩的fracability影响，它被岩相主要控制，结构的活动，形成压力，等等。页岩油水库评估应该集中于TOC内容，器官富人的页岩的厚度，岩相和结构的因素。

简介：ObjectiveUnderstandingthedynamicsofsedimentgravityflowsisofgreatimportancetocorrectlyinterprettheirrelateddeposits.Thediscoveryofsupercriticalsedimentgravityflowsprovidessomenewviewpointsfortheexplanationofcontroversialsedimentgravityflowdeposits.However,thedynamics,formation,evolutionprocessesofsupercritical

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简介：Byinvestigatingtheeffectsondeepoceanambientnoiseoftyphoon'KAI-TAK'whichpassedthenorthareaoftheSouthChinaSea,itisshownthatthewindspeed,therainfallintensityandthelongwaveswellcausedbytyphoonaffecttheoceanambientnoisesignificantly.Thecorrelationbetweentheoceanambientnoiseandthewindspeedduringthetyphoonismuchbetterthanthatinthenon-typhoonperiodinthesameBeaufortscale.Analysisofthecorrelationbetweenthe415hoceanambientnoisemeasureddataandwindspeedshowsthat,whenthefrequencyisgreaterthan300Hz,thecorrelationcoefficientbetweentheoceanambientnoiseandthewindspeedisgreaterthan0.5,achievingamoderatecorrelation;whenthefrequencyisgreaterthan630Hz,thecorrelationcoefficientisbetween0.8and0.9,achievingahighdegreeofcorrelation.Thecorrelationbetweentheoceanambientnoiseandthewindspeedisbetterthanthatbetweentheoceanambientnoiseandthesignificantwaveheightwhenthefrequencyisgreaterthan300Hz.Thecorrelationbetweentheoceanambientnoiseandthewindspeedininfrasonicbandfrom10Hzto20HzispoorintheSouthChinaSea,becausetheshippingisbusyinthisseaareaandtheoceanambientnoiseiscontaminatedbytheshipnoiseevenduringthetyphoon.

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简介：Theimpactsofsoilmoisture(SM)onheavyrainfallandthedevelopmentofMesoscaleConvectionSystems(MCSs)areinvestigatedthrough24-hnumericalsimulationsoftwoheavyrainfalleventsthatoccurredrespectivelyon28March2009(Case1)and6May2010(Case2)oversouthernChina.ThenumericalsimulationswerecarriedoutwithWRFanditscoupledNoahLSM(LandSurfaceModel).First,comparativeexperimentsweredrivenbytwodifferentSMdatasourcesfromNCEP-FNLandNASA-GLDAS.Secondary,withtherundrivenbyNASA-GLDASdataasacontrolone,aseriesofsensitivitytestswithdifferentdegreeof(20%,60%)increaseordecreaseintheinitialSMwereperformedtoexaminetheimpactofSMonthesimulations.Comparativeexperimentresultsshowthatthe24-hsimulatedcumulativerainfalldistributionsarenotsubstantiallyaffectedbytheapplicationofthetwodifferentSMdata,whiletheprecipitationintensityischangedtosomeextent.ForecastskillscoresshowthatsimulationwithNASA-GLDASSMdatacanleadtosomeimprovement,especiallyintheheavyrain(芏50mm)forecast,wherethereisupto5%increaseintheTSscore.SensitivitytestanalysisfoundthatapredominantlypositivefeedbackofSMonprecipitationexistedinthesetwoheavyraineventsbutnotwithcompletelythesamefeatures.Organizationoftheheavyrainfall-producingMCSseemstohaveanimpactonthefeedbackprocessbetweenSMandprecipitation.ForCase1,theMCSwaspoorlyorganizedandoccurredlocallyinlateafternoon,andtheincreaseofSMonlycausedaslightenhancementofprecipitation.Driersoilwasfoundtoresultinanapparentdecreaseofrainfallintensity,indicatingthatprecipitationismoresensitivetoSMreduction.ForCase2,astheheavyrainwascausedbyawell-organizedMCSwithsustainedprecipitation,therainfallismoresensitivetoSMincrease,whichbringsmorerainfall.Additionally,distinctivefeedbackeffectswereidentifiedfromdifferentstagesanddifferentorganizationofMCS,withstr

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简介：ThispaperfocussesontheinformationasymmetryincrisisnewsafteraseriousincidentinTianjin,China,in2015.Theincidentcausedenormousdamageandresultedinsocietalunrestbecauseofthelackofreliableinformationfromtheformalmediachannels.Socialmedia—microblogs—playedamajorroleinreportingoncrisissituations.Wedividednetizens(i.e.,thecitizensofthenet)intohighandlowtypesaccordingtotheirinformation-criticalleveltothecrisisnews.Thedatashowsinformationdeteriorationonthecrisisnews,relatedtothenetizens’information-criticallevel.Forthetraditionalmediathereistheopportunitytouseinformationqualitydistortiontomakemoremarginalprofits.Thisispossibleonlyifthecitizens’informationstaysunderacertainqualitylevel.Theresultisoverprovisionoflowqualitynewsandhighqualitynewsdrivenoutofthemarket,whereuponadverseselection(i.e.,alackofsymmetricinformation)appears.However,byadoptingaprocessview,wefoundself-correctingmechanism(i.e.,dyingoutofrumors)ofthesocialmediacommunitiesinChina.Weprovidedaagent-basemodelandsimulationtoshowthatthemoremediaexistinthemarket,thefasterspeedoftheinformationdeterioration,butalsothecapacityto‘discuss’rumors.

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简介：Objective:Toevaluatetheefficacyandfeasibilityofscreeningprocedureforuppergastrointestinalcancerinbothhigh-riskandnon-high-riskareasinChina.Setting:Sevencities/counties,representingthreeeconomical-geographicalregions(Eastern,CentralandWestern)inChina,wereselectedasscreeningcenters:threeinhigh-riskareasandfourinnon-high-riskareas.Participants:Villages/communitiesinthesesevencentersregardedasclusterswererandomlyassignedtoeitherinterventiongroup(screeningbyendoscopicexamination)orcontrolgroup(withnormalcommunitycare)ina1:1ratiostratifiedbyeachcenter.Eligibleparticipantsarelocalresidentsaged40–69yearsintheselectedvillages/communitieswithnohistoryofcancerorendoscopicexaminationinthelatest3yearswhoarementallyandphysicallycompetent.Thosewhoarenotwillingtotakeendoscopicexaminationorareunwillingtosigntheconsentformareexcludedfromthestudy.Totally140,000participantswillbeenrolled.Interventions:Inhigh-riskareasofuppergastrointestinalcancer,allsubjectsinscreeninggroupwillbescreenedbyendoscopy.Innon-high-riskareas,30%ofthesubjectsinscreeninggroup,identifiedthroughasurvey,willbescreenedbyendoscopy.Primaryandsecondaryoutcomemeasures:Theprimaryoutcomeisthemortalitycausedbyuppergastrointestinalcancer.Thesecondaryoutcomesincludedetectionrate,incidencerate,survivalrate,andclinicalstagedistribution.Additionaldataonqualityoflifeandcost-effectivenesswillalsobecollectedtoanswerimportantquestionsregardingscreeningeffects.Conclusions:ScreeningstrategyevaluatedinthoseareaswithpositivefindingsmaybepromotednationallyandappliedtothemajorityofChinesepeople.Ontheotherhand,negativefindingswillprovidescientificevidenceforabandoningatestandshiftingresourceselsewhere.Trialregistration:ThestudyhasbeenregisteredwiththeProtocolRegistrationSysteminChineseClinicalTrialRegistry.

简介：对早二叠的A类型花岗石晚含碳广泛地在整个西方Junggar区域，NW中国，和Akebasitaopluton被散布极其在这些plutons之中被区分。在这份报纸，我们报导了新anisotropy磁性易受影响(AMS)数据与发出声音估计三维的形状和Akebasitaopluton的magmatic炮兵阵地机制的详细领域学习和听觉的magnetotelluric(AMT)结合。发出声音的地质的特征和AMT显示pluton从西北有岩浆的一个稍微倾斜的运动到东南，它是最可能的与塑造岩盖的上面的部分，和位于它的西北的部分以内的亚vertical根形成的更低的部分对应于一个不均匀的火炬，可能由趋势NEAnqi差错控制了。所有标本的AMS织物揭示低Pj价值(1.02的平均数)和低T价值(0.024的平均数)，建议AMS椭圆体的变丑是相对弱的。标本展出AMS椭圆体的过寺院生活、延长的形状。没有任何比较喜欢的取向，磁性的线条和生叶随机在整个pluton被散布。这些AMS模式显示pluton没有地区性的挤出在相对稳定的结构的环境形成了。因此，我们建议岩浆在到达了更浅的外壳层次经由的一个复杂炮兵阵地过程深差错并且随后占据了doming创造的房间，由在pluton房顶附近停止伴随了。另外，地区性的构造背景在Akebasitaopluton的炮兵阵地期间是相对稳定的，显示有压缩性的造山运动在期间的结束晚迟了在西方Junggar区域含碳。这个结论完美地与地区性的构造paleogeography，magmatic系统，和paleostress地与一致。

简介：对台风Megi(2010)的上面海洋的回答从南船座漂流和卫星TMI用数据被调查。实验用一个三维的普林斯顿海洋模型(POM)被进行估计暴风雨，它影响了西北太平洋(NWP)和华南海(SCS)。结果证明upwelling和乘火车一起为93%SST异例试验报道，在导致台风的upwelling可以引起强壮的海洋冷却的地方。另外，冷却的异常SST比在NWP在SCS是更强壮的。海洋反应的最惹人注目的特征是在在NWP是不在的SCSa特征的一个二层的惯性的波浪的存在。当台风醒来，在惯性附近的摆动能被产生，它在表面有最大的流动速度混合的层并且可以持续一些天，在台风经过以后。沿着台风轨道，在上面的海洋的水平水流显示出一系列轮流出现从台风发出的否定、积极的异例。

简介：China'sislandandreefcoastsaremainlydistributedalongthecoastsofZhejiangandFujianprovinces.Theseareashavefavorabledeep-waterconditionsandgreatdevelopmentpotential.TheZhoushanArchipelagoisatypicalislandandreefcoast.Inthemidstoftheislands,therearemanytidalchannelswithhighwaterdepthandhighcurrentvelocity.DaishanIslandislocatedonthenorthernpartoftheZhoushanArchipelago.TheseanorthofDaishanIslandcanbecharacterizedashavinggreatwaterdepth(generallybetween10and20m),highcurrentvelocity(themaximummeasuredvalueisabout2m/s),andhyperconcentratedsuspendedsediment(annualaverageconcentrationundernormalweatherconditionsisabout0.6kg/m3).Sedimenttransportisinfluencedbytheco-actionofwavesandcurrents.Landreclamationcaneasethecontradictionbetweenthedesirefordevelopmentandthelandresourceshortageonislandandreefcoasts.Landreclamationgenerallystartsfromdeposition-promotingprojectsonislandandreefcoastswithhyperconcentrationofsuspendedsedimentwiththeaimofreducingthereclamationcost.BasedonthemorphodynamiccharacteristicsoftheseaareanearnorthofDaishanIsland,atwo-dimensionalmathematicalmodelwasdevelopedtoanalyzetheco-actionofcurrentandwavesandthemodelwasverifiedforspringaswellasneaptidesin2007and2012.Thesimulatedvaluesoftidalstages,tidalcurrentvelocities,tidalcurrentdirections,andsuspendedsedimentconcentrationat15stationsin2007and9stationsin2012wereingoodagreementwiththein-situmeasuredvalues.Furthermore,thesimulatedmagnitudeandpatternoferosionandsedimentationagreedwellwiththeobservations.Thismodelwasusedtoevaluatetheeffectsofaproposedsiltationschemeonthehydrodynamicenvironmentandmorphologicalchangeofthestudyarea.Theresultsofthisstudycaninformtheprotection,development,andutilizationofshoal-channelsonislandandreefcoasts,aswellprovideascientific

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简介：随着黑龙江省北药开发战略的逐步实施，中草药种植的经济效益越来越被广大农民所认可，黄芪、山药等中草药的种植面积也逐年增大。而手工播种劳动强度大又无法形成规模，经济效益无法大幅度提高，广大农民对于黄芪、山药等中草药的播种机械需求也越来越强烈，有很多农民提出了高价定制种植黄芪、山药等中草药的专用播种机械的要求。为此勃农兴达机械有限公司在原有2BJZ-2型精密播种机的基础上单独设计了适用于黄芪、山药等中草药的专用排种器和播种开沟及覆土部件，经过多次改进和试验最终成功研制了2BHS-2型黄芪垄上撒播机。经过4年多的努力，该机已成为批量生产的成熟产品，为公司创造了几百万元的经济效益。

简介：行程问题是小学数学竞赛和小升初出现频率最高的应用题,它形式多样,内容繁多。行程问题的三个基本量是路程、速度和时间。根据物体的起始位置、运动方向、运动结果等因素,行程问题又可以分为相遇问题与追及问题两个大类。解决行程问题的关键在于:1.充分利用图示把题中的情节形象地表示出来,帮助分析数量关系;2.利用比例知识(速度一定,路程与时间成正比;时间一定,路程与速度成正比;路程一定,速度与时间成反比),把已知条件进行转化,便于比较求出变化过程中的某种量;3.遇