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简介：ＡｐｐｌｉｃａｔｉｏｎｏｆｃｅｒｔａｉｎｔｙｆａｃｔｏｒｓｏｆｅａｒｔｈｑｕａｋｅｐｒｅｃｕｒｓｏｒｙａｎｏｍａｌｙｅｖｉｄｅｎｃｅｓＣＦ（Ｅ）ＺＨＡＯ－ＢＩＺＨＥＮＧ（郑兆），ＪＵＮＺＨＡＮＧ（张军）ａｎｄＭＥＩＱＩＮＧ（庆梅）Ｓｅｉｓｍｏｌｏ...

简介：Theharmonicanalysismethodbasedonhighandlowwaterlevelsisdiscussedinthispaper.Inordertomakefulluseoftheinformationofhighandlowwaterobservations(thetimederivativeofwaterlevelattheobservationtimeiszero),theweightcoefficient,w,isintroducedtocontroltheimportanceofthepartrelatedtothisinformationintheerrorformula.Themajordiurnalconstituents,O1andK1,andsemi-diurnalconstituents,N2,M2andS2areselecteddirectlyfromthemonthlydataanalysis,andsomeotherimportantconstituents,P1,v2andK2,areincludedastheinferredconstituents.Theobtainedharmonicconstantsofthemajorconstituentsareveryclosetothoseobtainedfromtheanalysisofhourlydata,andthisshowsthathighandlowwaterdatacanbeusedtoextracttidalconstantswithhighaccuracy.Theanalysisresultalsoshowsthattheinferenceandtheweightingcoefficientareimportantinthehighandlowwaterdataanalysis,anditissuggestedthatw≥1shouldbetakeninmonthlyhighandlowwaterdataanalysis.Thisanalysismethodcanbeuseddirectlytoanalyzealtimetricdatawithw=0.

简介：85-stationdailyprecipitationdatafrom1961-2010providedbytheNationalMeteorologicalInformationCenterandtheNCEP/NCAR2010dailyreanalysisdataareusedtoinvestigatethelow-frequencyvariabilityontheprecipitationofthefirstrainseasonanditsrelationshipswithmoisturetransportinSouthChina,andchannelsoflow-frequencywatervaportransportandsourcesoflow-frequencyprecipitationarerevealed.Theannuallyfirstrainingseasonprecipitationin2010ismainlycontrolledby10-20dand30-60doscillation.Therainfallismore(interrupted)whenthetwolow-frequencycomponentsareinthesamepeak(valley)phase,andtherainfallislesswhentheyaresuperposedintheinversephase.The10-20dlow-frequencycomponentofthemoisturetransportismoreactivethanthe30-60d.The10-20dwatervaporsourceslieintheSouthIndiaOceannear30°S,theareabetweenSumatraandKalimantanIsland(thesouthwestsource),andtheequatorialmiddlePacificregion(thesoutheastsource),andtherearecorrespondingsouthwestandsoutheastmoisturetransportchannels.Byusingthecharacteristicsof10-20dwatervaportransportanomalouscirculation,thecorrespondinglow-frequencyprecipitationcanbepredicted6dahead.

简介：ＥＮＥＲＧＥＴＩＣＤＩＡＧＮＯＳＩＳＦＯＲＴＷＯＫＩＮＤＳＯＦＬＯＷＬＥＶＥＬＪＥＴＳＷａｎｇＺｈｏｎｇｘｉｎｇ（汪钟兴）（矫梅燕）（１．ＤｅｐａｒｔｍｅｎｔｏｆＥａｒｔｈａｎｄＳｐａｃｅＳｃｉｅｎｃｅｓ，ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄ...

简介：Traditionalmagneto-electricvibrationsensorsandservoaccelerometershavesevereshortcomingswhenusedtomeasurevibrationwherelowfrequencycomponentspredominate.Alowfrequencycharacteristicextensionforvelocityvibrationsensorsispresentedinthispaper.Thepassivecircuittechnology,activecompensationtechnologyandtheclosedcyclepolecompensationtechnologyareusedtoextendthemeasurablerangeandtoimprovelowfrequencycharacteristicsofsensors.ThsesthreetypesoflowfrequencyvelocityvibrationsensorshavebeendevelopedandwidelyadoptedinChina.

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简介：Theultra-low-frequency(ULF)electromagneticemissionisrecentlyrecognizedasoneofthemostpromisingcandidatesforshort-termearthquake(EQ)prediction.ThispaperreviewspreviousconvincingevidenceonthepresenceofULFemissionsbeforethreemajorEQs.Then,wepresentfurtherstatisticalstudyontheULFoccurrence,ournetworksofULFmonitoringindifferentspatialscalesinJapanandfinallywepresentseveralsignalprocessingstoidentifytheseismogenicemissionsbyshowinglatestresultsforrecentlargeEQs.

简介：在西南中国的云南的低纬度高地的降水政体服从于在东方亚洲夏天季风和印度夏天之间的相互作用表面山志学的季风，和影响。在它的空间、时间的模式的变化的理解着急地为气候变化设计，水文学影响建模，和地区性、下游的水资源管理被需要。用在最后几十年(1950s2007)的低纬度高地的每日的降水记录，降水的一个时间系列索引，包括年度降水，多雨的天的数字，吝啬的年度降水紧张，雨季的发作的日期，降水的度和时期季节的集中，最高1天、3天、7天的降水，和降水在不同紧张上面为降水多雨的天总计并且数(例如10公里，25公里一没有趋势的预先增白的Mann-Kendall趋势测试然后被用来检测时间系列数据的趋势。结果证明在年度降水和越过低纬度高地的降水趋势的强壮的季节的区别没有重要趋势。弹簧和冬季正在变得更湿，夏天正在变得更干燥。秋天在东方正在变得更干燥并且在西方更湿。作为后果，降水的seasonality稍微正在变弱。雨季和最高的降水的时期的开始趋于更早。同时，低纬度高地也见证不太多雨的天，更强烈的降水，稍微更长中等、重的降水事件，和更经常的极端降水事件。另外，降水趋势的地区性的区别是显著的。这些变化可以与东方亚洲夏天季风变弱并且南方亚洲人夏天季风，以及特殊多山的地面的走廊障碍效果加强被联系。然而，包含的物理机制仍然需要以后被揭开。

简介：Lunnan()低在开发的地方，高举在奥陶纪和含碳的水库的冷凝物水池的数量，在北方定位Tarim盆高举，西北中国。自从喜玛拉雅的运动，Lunnan区域经历了集中的煤气的侵略，引起在奥陶纪水库共存的累积的多重类型。Geochemical证据证明这些冷凝物油具有低成熟(1.0%附近的vitrinite反射层次)，冷凝物气体的主导的部件是干燥气体(超过94%的CH4的内容)，它思考在Lunnan区域的冷凝物水池不是热裂开的产品，但是随后的累积源于阶段分别。而且，我们在Lunnan区域的C6-C7烃上的观察是类似于有比剩余油有更高的石蜡和更低的aromaticity的冷凝物的阶段分别的效果的品质上。因此，冷凝物的二种类型被他们的阶段行为定义，它是浸透的冷凝物水池和nonsaturated水池。有一枚油戒指的浸透的冷凝物水池主要在奥陶纪水库发展了，与形成压力(FMP)和露水点压力(DPP)之间的大差别。这些冷凝物的起源是被考虑在原处，分离由过多的干燥气体的侵略被触发。在另一方面，几乎在含碳的水库存在的nonsaturated冷凝物水池是包含FMP和DPP之间的细微差别的一座烃水库，没有油戒指，并且成为蒸气的分别由于差错运动控制它的产生。

简介：Ｆｏｒｔｈｅｐｕｒｐｏｓｅｓｏｆｆｌｏｏｄｃｏｎｔｒｏｌ，ｃｏｎｖｅｙａｎｃｅｏｆｓｅｄｉｍｅｎｔ，ａｎｄａｄｅｑｕａｔｅｕｔｉｌｉｚａｔｉｏｎｏｆｗａｔｅｒｒｅｓｏｕｒｃｅｓｉｎｔｈｅＬｏｗｅｒＹｅｌｌｏｗＲｉｖｅｒ，ｔｈｅｏｐｅｒａｔｉｏｎｓｃｈｅｍｅｏｆｓｅｄｉｍｅｎｔｒｅｇｕｌａｔｉｏｎｏｎｐｅｒｅｎｎｉａｌｂａｓｉｓｉｓｐｒｏｐｏｓｅｄｆｏｒｔｈｅＸｉａｏｌａｎｇｄｉＲｅｓｅｒｖｏｉ．Ｗａｔｅｒａｎｄｓｅｄｉｍｅｎｔａｒｅｒｅｔａｉｎｅｄｉｎｔｈｅｒｅｓｅｒｖｉｏｒｉｎｎｏｒｍａｌａｎｄｌｏｗｗａｔｅｒｙｅａｒｓ，ｗｈｉｌｅｉｎｙｅａｒｓｗｉｔｈａｂｕｎｄａｎｃｅｏｆｗａｔｅｒ，ｔｈｅｙａｒｅｆｌｕｓｈｅｄｏｕｔｉｎｓｈｏｒｔｐｅｒｉｏｄｓｏｆｒｅｓｅｒｖｏｉｒｄｒａｗｄｏｗｎｔｏｆｏｒｍｈｙｐｅｒｃｏｎｃｅｎｔｒａｔｅｄｆｌｏｏｄｓ．ＴｈｅｓｅｒｅｍｏｕｌｄｔｈｅｗｉｄｅｓｈａｌｌｏｗｒｅａｃｈａｂｏｖｅＧａｏｃｕｎｉｎｔｏａｎａｒｒｏｗｄｅｅｐｃｈａｎｎｅｌ，ｔｈｒｏｕｇｈｗｈｉｃｈｔｈｅｓｅｄｉｍｅｎｔｍａｙｂｅｔｒａｎｓｐｏｒｔｅｄａｌｌｔｈｅｗａｙｔｏｔｈｅｓｅａ．Ｔｈｅｒｅｓｕｌｔｓ?

简介：在大气的低频率的波浪上的海洋的强迫的效果(LFW为短)在海洋和空气分别地作为一个独立系统被拿的地方，在热带被分析。在这里，海洋的效果作为蒸发风反馈是parameterized(EWF为短)并且SST强迫。在EWF的调整下面，没有EWF，从那SST戏强迫一个不同角色因此LFW是diabatic飘动，由多重因素的相互作用强迫了，在热带。关键词大气的LFW-海洋的强迫-EWF-放射的冷却-SST这份报纸被鈥?首先支持海洋的科学，州的海洋的管理，地球物理的液体动力学的国家重点实验室和数字建模鈥的研究所？

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简介：在海洋的上面的层的热分布被使用各种各样的典型因素学习了，一些重要低频率摆动(LFO)已经被发现并且确定。在这篇论文，“一个海区域的热中心”与一个简单方法被定义。然后全球海洋的上面的层的温度数据集(从在to400m下面的表面，1955-2003)被分析检测可能的LFO。不仅一些带的LFO，早被报导，而且垂直、南方的热分发的一些强壮的LFO被检测。类似的垂直摆动模式能在太平洋，大西洋和印度洋被发现，这应该被注意。从一些初步的研究的结果证明垂直LFO可能被太阳的发光异例引起。这研究可以帮助在全球海洋揭示一些未知动态过程并且可以也有益于另外的相关研究。

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简介：Manganesewasextractedfromleachinglow-grademanganeseoreinsulfuricacidmedium.Theeffectsofgranulediameter,leachingtime,liquid/solidratio(V/W)andtheconcentrationofsulfuricacidwereinvestigatedthroughorthogonalandsinglefactorexperiments.Theexperimentalresultsshowedthattheoptimalleachingconditionsare,sizeof0.054mm,120minutesofreactiontime,3(V/W)ofliquid/solidratioand30%oftheconcentrationofsulfuricacid(g/g).Underthoseconditions,theleachingefficiencyis96.73%.Thekineticsoftheleachingprocessisinaccordancewiththecharacteristicsoffractalreaction.

简介：ManyhistoricbuildingsinoldurbancentersinEasternCanadaaremadeofstonemasonryreputedtobehighlyvulnerabletoseismicloads.Seismicriskassessmentofstonemasonrybuildingsisthereforethefirststepintheriskmitigationprocesstoprovideadequateplanningforretrofitandpreservationofhistoricalurbancenters.Thispaperfocusesondevelopmentofanalyticaldisplacement-basedfragilitycurvesreflectingthecharacteristicsofexistingstonemasonrybuildingsinEasternCanada.TheoldhistoriccenterofQuebecCityhasbeenselectedasatypicalstudyarea.Thestandardfragilityanalysiscombinestheinelasticspectraldisplacement,astructure-dependentearthquakeintensitymeasure,andthebuildingdamagestatecorrelatedtotheinducedbuildingdisplacement.Theproposedprocedureconsistsofathree-stepdevelopmentprocess:(1)mechanics-basedcapacitymodel,(2)displacement-baseddamagemodeland(3)seismicdemandmodel.Thedamageestimationforauniformhazardscenarioof2%in50yearsprobabilityofexceedanceindicatesthatslighttomoderatedamageisthemostprobabledamageexperiencedbythesestonemasonrybuildings.ComparisonisalsomadewithfragilitycurvesimplicitintheseismicriskassessmenttoolsHazusandELER.Hazusshowsthehighestprobabilityoftheoccurrenceofnotoslightdamage,whereasthehighestprobabilityofextensiveandcompletedamageispredictedwithELER.Thiscomparisonshowstheimportanceofthedevelopmentoffragilitycurvesspecifictothegenericconstructioncharacteristicsinthestudyareaandemphasizestheneedforcriticaluseofregionalriskassessmenttoolsandgeneratedresults.

简介：Tomaintaingashydratestability,low-temperaturedrillingfluidsandhighdrillingspeedsshouldbeusedwhiledrillingingashydrate-bearingsediments.Theeffectofthedrillingfluidondownholerocksurfacesatlowtemperaturesisveryimportanttoincreasethedrillingrate.Thispaperanalyzedtheactionmechanismofthedrillingfluidondownholerocksurfacesandestablishedacorrespondingevaluationmethod.Thesofteningeffectofsixsimulateddrillingfluidswith0.1wt.%offourcommonsurfactantsandtwocommonorganicsaltsonthedownholerocksurfacestrengthwasevaluatedexperimentallyusingtheestablishedmethodatlowtemperature.Theexperimentalresultsshowedthatthesurfactantsandorganicsaltsusedinthedrillingfluidsaidedinthereductionofthestrengthofthedownholerocksurface,andtheestablishedevaluationmethodwasabletoquantitativelyrevealthedifferenceinthesofteningeffectofthedifferentdrillingfluidsthroughcomparisonwithwater.Inparticular,themostcommonsurfactantthatisusedindrillingfluids,sodiumdodecylsulfate(SDS),hadaverygoodsofteningeffectwhiledrillingunderlow-temperatureconditions,whichcanbewidelyappliedduringdrillinginlow-temperatureformations,suchasnaturalgashydrate-bearingsediments,thedeepseafloorandpermafrost.

简介：Ｓｔｒｅｓｓｒｅｌａｘａｔｉｏｎａｎｄａｔｔｅｎｕａｔｉｏｎｏｆｆｌｕｉｄ－ｓａｔｕｒａｔｅｄｓａｎｄｓｔｏｎｅａｔｌｏｗｆｒｅｑｕｅｎｃｙＤａｏ－ＹｉｎｇＸＩ（席道瑛），Ａｉ－ＷｅｎＬＩＵ（刘爱文）ａｎｄＷｅｉＬＩＵ（刘卫）（Ｕｎｉｖｅｒｓｉｔｙｏ...

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