简介：Inthispaper,theSpaceWeatherModelingFramework(SWMF)isusedtosimulatethereal-timeresponseofthemagnetospheretoasolarwindeventonJune5,1998,inwhichtheinterplanetarymagneticfieldshifteditsdirectionfromnorthtosouth.Sincemostcurrentmodelsdonottakeintoaccountconvectiveeffectsoftheinnermagnetosphere,wefirststudytheimportanceofRiceConvectionModel(RCM)intheglobalmodel.Wethenfocusonthefollowingfouraspectsofthemagnetosphere’sresponse:themagnetosphere’sdensitydistribution,thestructureofitsmagneticfieldlines,theareaofthepolarcapboundary,andthecorrespondingionosphericcurrentchange.Wefindthat(1)whentheIMFchangesfromnorthtosouthinthisevent,highmagnetosheathdensityisobservedtoflowdownstreamalongthemagnetopausewiththesolarwind;low-latitudereconnectionatdaysideoccursunderthesouthwardIMF,whilethemagneticfieldlinesinthetaillobecaudal,causedbythenightsidehighlatitudereconnection,extendintotheinterplanetaryspace.Openmagneticfieldlinesexistsimultaneouslyatbothhighandlowlatitudesatthemagnetopause;(2)theareaofthepolarcapisobviouslyincreasediftheIMFturnsfromthenorthtothesouth;thisobservationishighlyconsistentwithempiricalobservations;(3)theionosphericfieldaligncurrentinthenorthernhemisphereisstrongerthaninthesouthernhemisphereandalsoincreasesastheIMFchangesfromnorthtosouth.SWMFwiththeRiceConvectioneffectprovidesreliablemodelingofthemagnetosphericandionosphericresponsetothissolarwindvariation.

简介：ＩＮＴＲＯＤＵＣＴＩＯＮＮｏｒｔｈＱｉｌｉａｎＭｏｕｎｔａｉｎｓｈａｓｕｎｄｅｒｇｏｎｅｔｈｒｅｅｋｉｎｄｓｏｆｔｅｃ－ｔｏｎｉｃｓｙｓｔｅｍｓｓｉｎｃｅＰｒｏｔｅｒｏｚｏｉｃ，ｎａｍｅｌｙｃｏｎｔｉｎｅｎｔａｌｒｉｆｔ，ｐｌａｔｅｔｅｃｔｏｎｉｃａ...

简介：直接暴露于日光的方面上的树通常变得比在相反的方面上快，现象称为植物向光性。在situ有在Yanqing县的Xiadelongwan区域的硅化的木头的垂直箱子，北方北京，在自从2002，中国的石化的伍德的第一个国家地质的公园被造了的地方。一些箱子有保存得很好的生长戒指。一个人石化从形成的树桩显示出SW230°的一个积极向光性方向。作为与现代正常相比，生长走在北京平凡区域，它有SW210°±的一个积极向光性方向5°，木头向光性的证据支持自从迟了的侏罗记，北方中国板顺时针方向旋转了的以前的palaeomagnetic研究的结论。在Yanshan辽宁区域的已知的石化的木头树桩主要从165-136妈的阶层被发现，它对应于Yanshanian运动的主要阶段。

简介：InMarchthisyear,NorthChinamainnetworkwasinterconnectedwithShandongnetworkthrougha500-kVlinebetweenXin'anSubstation(HebeiHandan)andLiaochengSubstation(Shandong).Asaresult,all500-kVlinesofNorthChinaPowerNetworkhavebeenconnectedtothemainnetwork.

简介：ＴＨＥＳＩＭＵＬＡＴＩＯＮＯＦＡＳＰＲＩＮＧＰＲＥＣＩＰＩＴＡＴＩＯＮＰＲＯＣＥＳＳＦＯＲＩＣＥＳＥＥＤＩＮＧＩＮＮＯＲＴＨＣＨＩＮＡＷａｎｓＸｉａｏｂｉｎ（汪晓滨），ＨｕＺｈｉｊｎ（胡志晋）ａｎｄＹｏｕＬａｉｇｕａｎｇ（游来光）（Ｉｎｓｔｉｔｕｔｅ...

简介：TheNorthChinablock,thewesternportionoftheSino-KoreanCraton,isroundedbyYanshanianinthenorthandQinling-Dabieorogenicbeltsinthesouth.Thewidespreaddevelopmentofextensionalbasinsinthisblockindicateshorizontalextensionorcontinuedthinningofapreviouselythickened,trnstablelithospherethroughouttheMesozoic.Inthispaper,weattempttosimulatenumericallythegeodynamicalprocessofthebasinformationbyusingthemountain-basinevolutionsystem.WeassumethattheformationofnumeroussedimentarybasinsintheNorthChinablockistheresultofthecrustalextension,whichdestructsrapidlythepreviouslythickenedcrust.

简介：Althoughseismicgaptheoryplaysanimportantroleinthemed-andlong-termearthquakeprediction,thepotentialriskofthenon-seismicgapinhistoricalearthquakeruptureareaswillneedtobesimultaneouslytakenintoaccountinthestudyofmed-andlong-termearthquakeprediction,duetothetemporallyclusteringornon-linearbehavioroflargeearthquakerecurrence.Inordertoexploretechnicalmethodswhichcanbebasedonobservationaldata,andidentifyhistoricalearthquakerupturezones(includingtheseismicgapinhistoricalandprehistoricearthquakerupturezones),weselecteighthistoricallargeearthquakerupturezoneswithdifferentelapsedtimesonthemid-northsegmentoftheNorth-SouthSeismicBelttomakequantitativeanalysisonthecharacteristicsofmodernseismicityofthesezonesandpreliminarilyexploretheseismicitymethodfordeterminingtheurgencydegreeofpotentialearthquakehazards.Theresultsmainlyshowthatthepvalue,whichreflectstheattenuationofearthquakesequence,andthea-value,whichreflectstheseismicityrate,arestronglyrelatedtotheelapsedtimeofthelatestearthquakeintherupturezone.However,thecorrespondingrelationshipsinsomeruptureareasarenotclearperhapsduetothecomplexfaultstructureandfaultingbehavior.Theb-value,whichrepresentsthestateoftectonicstressaccumulation,doesnoteasilyreflecttheelapsedtimeinformationofdifferentevolutionstages.Theb-valuetemporalscanningshowsasteadyevolutionovertimeinmostoftherupturezones,butintherupturezoneoftheWuduM8.0earthquakeof1879,theb-valueshowssignificantfluctuationswithadecreasingtrendfor20years.Bycomparativeanalysis,weconcludethattherupturezonesofthe1933M7.5Maoxianearthquakeandthe1976M7.2Songpan-Pingwuearthquakearestillinthedecayingperiodofearthquakesequences,andthusdonothavethebackgroundforrecurrenceofM7.0earthquakes.Thelowb-valueMaqusegment,whichislocatedatthenorthmarginoftherupturezoneof

简介：ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｐａｌｅｏｃｏｎｔｉｎｅｎｔａｌｍａｒｇｉｎｓ，ｃｈａｒａｃｔｅｒｉｚｅｄｂｙａｃｔｉｖｅｉｎ－ｔｅｒａｃｔｉｏｎｂｅｔｗｅｅｎｅａｒｔｈｃｒｕｓｔａｎｄｍａｎｔｌｅ，ｃｏｍｐｌｉｃａｔｅｄｔｅｃｔｏｎ－ｉｃｍｏｖｅｍｅ...

简介：拿Yucheng，在是的山东省的一个典型的农业县一个盒子，应用逻辑回归建模空间地识别影响农田的因素的这研究变化。用在2001和2009的高分辨率形象的二个阶段，学习在20012009获得了陆地使用和农田变化数据。农田被5.14%在时期减少，这被发现，主要由于到森林土地的农田变换并且布满建筑物土地，尽管森林土地的部分和闲置的土地被变换成农田。逻辑回归的结果显示那个地点，人口生长和农民收入是影响农田变换的主要因素，当土壤打字时并且支持弯曲是控制农田变化的分发的主要自然因素。地区性的差别和农田变化的时间空间的变量影响了逻辑回归模型的恰当的能力。巨鸟恰当的测试显示逻辑回归模型给了地区性的陆地使用变化的好解释。逻辑回归分析是一个好工具鉴别影响陆地使用的主要因素由确定改变每个因素的贡献。

简介：AwesternNorthPacifictropicalcyclone(TC)intensitypredictionscheme(WIPS)isdevelopedbasedonTCsamplesfrom1996to2002usingthestepwiseregressiontechnique,withthewesternNorthPacificdividedintothreesub-regions:theregionnearthecoastofEastChina(ECR),theSouthChinaSearegion(SCR),andthefaroceanicregion(FOR).OnlytheTCswithmaximumsustainedsurfacewindspeedgreaterthan17.2ms1areusedinthescheme.Potentialpredictorsincludetheclimatologyandpersistencefactors,synopticenvironmentalconditions,potentialintensityofaTCandproximityofaTCtoland.VariancesexplainedbytheselectedpredictorssuggestthatthepotentialintensityofaTCandtheproximityofaTCtolandaresignificantinalmostalltheforecastequations.OtherimportantpredictorsincludeverticalwindshearinECR,500-hPageopotentialheightanomalyattheTCcenter,zonalcomponentofTCtranslationspeedinSCR,intensitychangeofTC12or24hpriortoinitialtime,andthelongitudeofTCcenterinFOR.IndependenttestsarecarriedoutforTCsin4yr(2004-2007),withmeanabsoluteerrorsofthemaximumsurfacewindbeing3.0,5.0,6.5,7.3,7.6,and7.9ms1for12-to72-hpredictionsat12-hintervals,respectively.Positiveskillsareobtainedatallleadingtimelevelsascomparedtotheclimatologyandpersistencepredictionscheme,andthelargeskillscores(nearorover20%)after36himplythatWIPSperformsespeciallybetteratlongerleadingtimes.Furthermore,itisfoundthattheamendmentinTCtrackpredictionandreal-timemodelanalysiscansignificantlyimprovetheperformanceofWIPSintheSCRandECR.FutureimprovementswillfocusonapplyingtheschemeforweakeningTCsandthosenearthecoastalregions.

简介：Sincetheendofthecoldwar,therehavetakeplaceanumberofnotablechangesintheThirdWorldandNorth-Southrelations,whichareexpectedtohaveafar-reachingimpactontheevolvingworldconfigurationandeventheinter-nationalrelationshipinthe21stcentury.

简介：TheGlobalPositioningSystem(GPS)isanewmethodtomonitorthecrustaldeformationforearthquakeprediction.Nowafour-dimensionalcrustaldeformationmonitoringnetworkapplyingGPStechniqueshasbeenestablishedinNorthChina,whichisanimportantseismicmonitoringarea.Resultswithhighprecisionhavebeenachievedinthefirstmeasurementsinceaseriesofadvancedmethodsandmeasureswereadopted,andthusagoodfoundationhasbeenlaidforfutureresearchesonearthquakepredictionandgeodynamics.

简介：Recentandpaleo-submarinelandslidesarewidelydistributedwithinstrataindeep-waterareasalongcontinentalslopes,uplifts,andcarbonateplatformsonthenorthcontinentalmarginoftheSouthChinaSea(SCS).Inthispaper,high-resolution3Dseismicdataandmultibeamdatabasedonseismicsedimentologyandgeomorphologyareemployedtoassistinidentifyingsubmarinelandslides.Inaddition,depositionmodelsareproposedthatarebasedonspecificgeologicalstructuresandfeatures,andwhichillustratethelocalstressfieldoverentiresubmarinelandslidesindeep-waterareasoftheSCS.TheSCSisoneofthelargestfluvialsedimentsinksinenclosedorsemi-enclosedmarginalseasworldwide.Itthereforeprovidesasetofpreconditionsfortheformationofsubmarinelandslides,includingrapidsedimentaccumulation,formationofgashydrates,andfluidoverpressure.Anewconceptinvolvingtemporalandspatialanalysesistestedtoconstructarelationshipbetweensubmarinelandslidesanddifferenttimescaletriggermechanisms,andthreemechanismsarediscussedinthecontextofspatialscaleandtemporalfrequency:evolutionofslopegradientandoverpressure,globalenvironmentalchanges,andtectonicevents.Submarinelandslidesthataretriggeredbytectoniceventsarethelargestbutoccurlessfrequently,whilesubmarinelandslidestriggeredbythecombinationofslopegradientandoverpressureevolutionarethesmallestbutmostfrequentlyoccurringevents.Insummary,analysisshowsthattheformationofsubmarinelandslidesisacomplexprocessinvolvingtheoperationofdifferentfactorsonvarioustimescales.

简介：Inrecentyears,especiallyinthesummerof2002,themostseriousforestfiresoccurredintheDaxinganMountainofHeilongjiangprovinceandInnerMongolia.TherehasbeenlongtimeseriousforestfireenvironmentinsummerinDaxinganMountain.Thegrassintheforestisscorchedforlongtimedroughtandthemoisturecontentoflitterandturflayerdecreaserapidly.Theaccumulationanddrynessoffuelbuildthesummerforestfireenvironment,whicharemajorcausedbyMeteorologicalenvironment....

简介：从纸再核对的Dalian地震station.this基于存在历史的数据和观察1916,1917的三历史的地震和1944in的参数北方黄海，在鸭绿江河region.The附近，结果证明他们的重定位的震中在contemporarily强烈的地震活跃地区被定位，与从Dalian地震Station.The结果的数据导出的结果一致在bothrevising地震目录和理解是珍贵的本地backgr

简介：基于最好轨道的数据和JRA-25分析，热带气旋(TC)的西方的向北和平的热带以外的转变(et)的气候学在这份报纸被介绍。它被发现那35%(318从912)所有，TC在1979期间经历了et-2008。温暖季节(通过9月的6月)et与大多数说明64%所有et事件在9月的出现。区域120楶祴搠湥楳祴眠獡挠潬敳祬挠牯敲慬整?潴琠敨漠獢牥敶???捡畣畭慬楴敶爠楡普污l

简介：FifteenuplandsoilscollectedfromthemajorarableareasinNOrthChinawereusedtoassesstheavailabilityofsoilsulfur(S)toplantsinapotexperiment.SoilswereextractedwithvariousreagentsandtheextractableSwasdeterminedusingturbidimetricmethodorinductivelycoupledplasmaatomicemissionspectrometry(ICP-AES),respectively.Inaddition,mineralizableorganicS,organicS,N/Sratio,sulfuravailabilityindex(SAI)andavailablesulfurcorrectionvalue(ASC)insoilswerealsodetermined.TheSamoutextractedby1.5gL^-1CaCl2wasnearlyequivalenttothatby0.25molL^-1KCl(40℃),andbothofthemwereslightlysmallerthanthatby0.01molL^-1Ca(H2PO4)2solution,asmeasuredbyturbidimetricmethodorICP-AES.TheextractableSmeasuredbyturbidimetricmethodwasconsistentlysmallerthanthatbyICP-AES.AllmethodstestedexceptthatfororganicSandN/SratioproducedsatisfactoyresultsintheregressionanalysesoftherelationshipsbetweentheamountsofSextractedandplantdrymatterweightandSuptakeinthepotexperiment,Ingeneral,0.01molL^-1Ca(H2PO4)2-extractedSdeterminedbyICP-AESorturbidimetricmethodand0.25molL^-1KCl(40℃)-extractedSdeterminedbyICP-AESappearedtobethebestindicatorsforevaluationofsoilavailableS.

简介：Asoneofthemostdynamiceconomiesintheworldsincethemid-1990s,EastAsiahasboosteditsregionalcooperationbythecoexistenceofmulti-levelandmulti-frameworkcooperation

简介：持续农业生产具有到食物供应安全的重要重要性。这研究试图在北方中国平原(NCP)并且随后在县规模调查庄稼收益反应到土壤质量的空间可变性导出关键土壤质量指示物。土壤样品从表面(020厘米)在2008引用geo、拿并且表面下(2040厘米)在整个Fengqiu县的132块地里的层，在NCP的中心定位了，为随后的土壤性质的分析。年度庄稼收益从土壤样品是镇定的一样的领域被获得。土壤质量与13个土壤性质基于一个模糊集合被评估，并且它的空间分布被集成geostatistical分析和地理信息系统(GIS)调查技术。土壤质量索引被分类进五个等级，并且他们的空间分布在县以内被印射。表面土壤质量比表面下的土壤高是大约一～二个等级。质量索引因为表面和表面下的土壤断然与年度庄稼收益被联系，建议两个的重要性。土壤有机物，全部的氮，可得到的P，和可得到的K贡献了50%联合重量到土壤质量索引并且以可持续性在区域作为土壤质量地位的关键指示物被识别。

简介：TheNorthChinaPlain(NCP)isthemostimportantfoodgrainproducingareainChinaandhassufferedfromseriouswatershortages.Tocapturevariationwateravailability,itisnecessarytohaveananalysisofchangingtrendsinprecipitation.Thisstudy,basedondailyprecipitationdatafrom47representativestationsinNCPrecordspassedthehomogeneitytest,analyzedthetrendandamplitudeofvariationinmonthly,seasonalandannualprecipitation,annualmaximumcontinuousno-raindays,annualraindays,rainfallintensity,andrainfallextremesfrom1960to2007,usingtheMannKendall(M-K)testandSen’sslopeestimator.Itwasfoundthatmonthlyprecipitationinwinterhadasignificantincreasingtrendinmostparts,whilemonthlyprecipitationinJulytoSeptembershowedadecreasingtrendinsomepartsofNCP.Nosignificantchangingtrendwasfoundfortheannual,dryandwetseasonprecipitationandrainfallextremesinthemajorityofNCP.Asignificantdecreasingtrendwasdetectedforthemaximumno-raindurationandannualraindaysinthemajorpartofNCP.ItwasconcludedthatthechangingtrendofprecipitationinNCPhadanapparentseasonalandregionalpattern,i.e.,precipitationshowedanobviousincreasingtrendinwinter,butadecreasingtrendintherainyseason(JulytoSeptember),andthechangingtrendwasmoreapparentinthenorthernpartthaninthesouthernandmiddleparts.Thisimpliesthatwithglobalwarming,seasonalvariationofprecipitationinNCPtendstodeclinewithanincreasingofprecipitationinwinterseason,andadecreasinginrainyseason,particularlyinthesub-humidnorthernpart.