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简介：Diexiearthquake(M7.5)in1933isagreateventthatoccurredattheeastborderofQinghai-XizangPlateauinthe20thcentury.Thereareobviouslydifferentopinionsabouttheshapeofisoseismallinesandthegeneticfaultofthisearthquke.Basedonthestudyofthenewlyfoundnorth-southtrendingactivefaultandgroundfissuresofDiexiearthquake,thispapertendstoholdthat,asthesouthwardextensionofMiujiangfault,thisnorth-southtrendingactivefaultmightbethegeneticfaultofthisevent.

简介：VarioustypesofgeologicalhazardsexistintheSouthChinaSea.Indynamicssense,theycanbecategorizedinto5principalgenetictypesrelatedtoeffectsofhydraulicdynamics,gaseousactivity,soilmechanics,gravityandtectonism,respectively.Integratedanalysesindicatethatthegeologicalhazardsassociatedwithvolcanoes,earthquakesandfracturesaremainlydistributedintectonicallyactiveregions,whereasthoseresultingfrommudflows,landslidesanddiapirsareusuallyconcentratedintheregionofslope,thatshallowgas,highpressuregaspocketsandsoftintercalationsaremajorpotentialgeologicalhazardsintheinnershelf,andthatstronghydraulicdynamics,especiallystormtide,isoneofthemajorcausesofgeologicalhazardsinthelittoralareas.ThegeologicalhazardsthatoccurredintheSouthChinaSeaarealsocharacterizedbyperiodicity,successionand,toacertainextent,unpredictabilityinadditiontoregionalization.

简介：TheSeptember11terroristattacksandtheconsequentU.S.actionsonterrorismaswellasitsadjustmentofglobalstrategyhaveexertedanin-depthinfluenceoninternationalandregionalsecuritystructure.AstheneighboringregionofAfghanistan--thetargetstateofAmericanwaronterror,itismoredifficultforSouthAsiatokeepalooffromtheaffairs.GreaterchangeshavetakenplaceinsecuritysituationintheregionandinWashington'scountermeasuresaswell.

简介：ThispaperpresentsthecontemporarymotionandactivedeformationofSouthAmericaplateandrelativemotionofNazca-SouthAmericaplateusingspacegeodeticdata.TheSouthAmericaplateismovingataverage14.5mm/awithanazimuthof15.2°andshrinkinginthewest-eastat10.9mm/a.ThegeodeticdeformationsofsiteswithrespecttotheSouthAmericaplateareinquitegoodagreementwiththeestimateddeformationsfromNNR-NUVEL1A,butthedeformationofthewesternSouthAmericaregionsisverylarge.

简介：ThesoilsinSouthChinaseaIslands(SCSI)weredividedintothreetypes,nmaely,phospho-calcsoils,skeletisolsandcoasticsolonchake,whichwerederivedfrombio-clasticandstronglycalcareoussediments.Incomparisonwiththeirparentmaterials,thephospho-CalcsoilshavehighercontentsofP,ZnCu,Ba,andCd,whichtendtoincreasegraduallywithtime,andlowercontentsofMg,Ca,Sr,B,V,Pb,andMo,whichtendtodecreasebydegreeswithtime,Theabove-mentionedconstituentsinskeletisolsandcoasticsolonchaksaresimilartothoseintheirparentmaterialsexceptforPandNa,Thefactorsaffectingelementdistributionaremainlyspecialbioclimateandparentmaterial,meanwhile,resultingintheremakableinfluenceonelementdistributionthroughsoil-formingtime.

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简介：大气、海洋的条件在西方的向北和平的热带气旋(TC)的生命周期的不同阶段期间被检验，与理解环境怎么影响在这个区域的TC的紧张变化的意愿。内在的海表面温度(SST)什么时候比26高，被发现增强通常发生

简介：<正>1966年,两位狂热的徒步旅行者来到内华达山脉附近,欲攀登海拔4418米的惠特尼峰边上的一座无名峰。持续了7个小时攀登后,他们因绳子用完而最终悻悻离去。得知器材和装备的重要性后,回到旧金山,两人合伙开一家制作登山用具的小店,取名为TheNorthFace,因为山峰的北坡往往是最冷、冰雪最深、最难以攀爬的一侧,它也暗指真

简介：ＴＨＥＳＣＩＥＮＴＩＦＩＣＷＡＴＥＲＭＡＮＡＧＥＭＥＮＴＩＮＷＩＮＴＥＲＷＨＥＡＴＰＲＯＤＵＣＴＩＯＮＡＮＤＩＴＳＥＣＯＮＯＭＩＣＢＥＮＥＦＩＴＳＩＮＮＯＲＴＨＣＨＩＮＡＡｎＳｈｕｎｑｉｎｇ（安顺清）ａｎｄＬｉｕＧｅｎｇｓｈａｎ（刘庚山）Ｒｅｓｅａｒ...

简介：在北方亚洲气旋(NAC)之间的关系活动和南部的环形的模式(SAM)在这研究被记录。NAC索引(NACI)的定义在诺思亚洲基于大气的相对涡度。分析产出在以前的冬季之间的重要积极关联南部的环形的模式索引(SAMI)和春天NACI在内部年度可变性，与0.51的一个关联系数在期间19482000。NAC相关、SAM相关的大气的一般发行量可变性的分析表明如此的一种关系。学习进一步表明当冬季SAM变得强壮时，在热带西方的太平洋的大气的传送对流将加强的春季和本地哈德利发行量将被加强。作为结果，在华南上的反常减退运动使温度坡度在底层加强了并且在高水平加强喷气，哪个对NAC的发展有益活动。

简介：涉及棉花一种蛾的幼虫Bt抵抗管理的避难处策略的有效性的评估将被允许监视的技术和在领域条件下面影响这个过程的关键因素的quantification帮助。我们在成年一种蛾的幼虫假设了稳定的碳和氮同位素的那描述，Helicoverpaarmigera(Hübner)(鳞翅目：Noctuidae)蛾可以帮助决定他们发展了在之上的幼虫的主人。我们发现分别地，从在花生，大豆或棉花上喂的幼虫饲养的蛾能用也对应于他们的各自的幼虫的主人起源的同位素的分析被区分。这些技术然后被用来分类在棉花(Gossypiumhirsutum)基于他们的同位素的签名回答进不同人口的Bt抓住的凶猛的第二代的一种蛾的幼虫蛾。在凶猛的蛾在Bt棉花捕获了的2006-2007，地主要与花生(Arachishypogea)相关用作他们的幼虫的主人，显示这是为Bt易受影响的一种蛾的幼虫个人的最重要的避难处庄稼(提供58%−64%个人)在为在诺思中国的第二代的独立的蛾山峰期间。仍然保持凶猛蛾与大豆(Glycine最大)(0−10%)相关；另外的C3植物(20%−22%)和主人打的non-C3植物(12%−14%)也提供了一些Bt敏感的蛾。地观察证明那棵花生组成贡献支撑在诺思中国分散进棉花的Bt易受影响的蛾的主要避难处庄稼。这些结果建议那棵花生可以是一个更有效的避难处支撑Bt易受影响的一种蛾的幼虫个人并且减少Bt抵抗的遗传因子型的开发的风险。

简介：Airtemperatureisakeyindexreflectingclimatechange.Airtemperatureextremesareveryimportantbecausetheystronglyinfluencethenaturalenvironmentandsocietalactivities.TheArcticairtemperatureextremesnorthof60°Nareinvestigatedinthewinter.Dailydatafrom238stationsatnorthof60°Nfromtheglobalsummaryofthedayfortheperiod1979–2015areusedtostudythetrendsofcolddays,coldnights,warmdaysandwarmnightsduringthewintertime.Theresultsshowadecreasingtrendofcolddaysandnights(rateof–0.2to–0.3d/a)andanincreasingtrendofwarmdaysandnights(rateof+0.2to+0.3d/a)intheArctic.Themeantemperatureincreases,whichcontributestotheincreasing(decreasing)occurrenceofwarm(cold)daysandnights.Ontheotherhand,thevarianceatmoststationsdecreased,leadingtoareducednumberofcoldevents.ApositiveAO(ArcticOscillation)indexleadstoanincreased(decreased)numberofwarm(cold)daysandnightsovernorthernEuropeandwesternRussiaandanincreased(decreased)numberofcold(warm)daysandnightsovertheBeringStraitandGreenland.ThelowerextentofArcticautumnseaiceleadstoadecreasednumberofcolddaysandnights.TheoccurrencesofabruptchangesaredetectedusingtheMann-KendallmethodforcoldnightsoccurringinCanadain1998andforwarmnightsoccurringinnorthwesternEurasiain1988.ThisabruptchangemainlyresultedfromthemeanwarminginducedbysouthwindsandanincreasedNorthAtlanticseasurfacetemperature.

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简介：TheoccurrenceandgeologicalgenesisofpyritesinLatePaleozoiccolasofNorthchinahavebeensystematicallystudiedintermsofcoalpetrology,coalchemistry,elementalgeochemistryandsulfurisotopegeochemistry.Theresultssuggestthateighttypesofpyrite,i.e.,framboidal,automorphicgraular,oolitic,massive,homogeneousspherical,allotriomorphic,nodular,joint-andfisure-fillingpyrintescanbesubdividedunderthemicroscope,Fourgenerationsofpyritearealsoreconizedaccordingtotheshape,size,coexistingassemblage,spacialdistributionrelationshipwithmacerals,thecontentsofsulfurandiron.atomicS/Feratiosandassociatedelementsinpryites.SulfurinLatePalozoiccolasofNorthChinaisofdiversesourceasevidencedbysulfurisotopevariationsinthepyrites.Theδ34Svaluesofpyritegeneratedattheearlystagetedtobenegative,andatthelatestage,positive.

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简介：CrustaldeformationinthenorthernpartofNorthChinaassociatedwithZhangbeiearthquakeisanalyzedusingGPSdatacollectedduring1992,1996and1999,precisere-levelingdatacol-lectedduring1992,1998and2000,andINSARresult(September22,1997-May6,1998).Theresultsindicate:①Theverticaldeformationisnotremarkablesince1992.TheverticalcrustaldeformationinthecentralandnorthernpartofNorthChinainrecent10yearsisofin-heritance.Thescopeofthesignificantdeformationis15km×15kmwithamagnitudeof250mmwhentheeventoccurred.②ThehorizontaldeformationisnotremarkableinanyunitofNorthChina.③Beforeandaftertheevent(1992-1996and1996-1999),thereiskinematicchangeofhorizontalmotionbetweendifferentunits.TheactivitymodealongYinshantectoniczonechangedfromrelativestaticstatetoleft-lateralstrikeslip;ThedominantextensionalmovementalongShanziriftzonechangedtoright-lateralstrikeslip;Yanshantectoniczonechangedfromleft-lateralstrike-slipwithextensiontoleft-lateralstrikeslip;Yanshan-Hebeitransitionalzoneformedbeforetheeventdisappearedaftertheevent.④Thescaleofthedeformationiscloselyrelatedtothephysicalpropertyofmediaandgeologicalstructureenvironment.Furtheranalys-isindicatesthat①ZhangbeiearthquakedoesnotmeanthattheearthquakeactivitybeginstobestrengthenedinNorthChina;②Thecrustalmovementisnormalatpresent;③Nextstron-gerearthquakeinNorthChianmightbelocatedinYanshantectoniczone,especiallyatitsbothends,andShanxitectoniczone.