简介:SpatialDistributionofEL2DefectinSemi-insulatingGaAsRuQiongna;LiGuangpingandHeXiukun(汝琼娜)(李光平)(何秀坤)(TianjngElectronicMaterials...
简介:利用1961~2014年春季宁夏20个气象站的降水及NCEP再分析等资料,重点分析了不同分布型ElNino事件次年宁夏春季降水的差异。结果表明:由于ElNino事件在1990年代以后主要转为中部型,宁夏春季降水对ElNino的响应也发生了变化,由之前在ElNino发生次年春季降水偏多,转为次年春季降水偏少。东部型和混合型ElNino事件次年春季,500hPa高度距平场上欧亚中高纬地区环流分布及700hPa水汽输送条件,均有利于宁夏出现降水;而中部型ElNino事件次年春季,青藏高原南侧以偏西风为主,青藏高原东南侧相对湿度较低,不利于宁夏春季出现降水。
简介:到目前为止,EL型风向风速计仍为气象台、站普遍使用的仪器,且使用的年限都较长,容易出故障。本人搞维修工作多年,现将碰到的风速部分的典型故障及处理情况作如下交流。1一套新安装的EL型电接仪,指示器风速表头有指示,但记录拉平线。用替换法换指示器、记录器后,故障依旧,说明故障在感应器的风速表内。风速表提供记录部分的工作原理是:当风杯转动时,风杯轴带动蜗轮,并通过拨钩推动凸轮一起转动,风速电接簧片沿着凸轮表面滑动,风杯转过80圈后,上簧片先从凸轮上最高点跌下来与下簧片接触,紧跟着下簧片又从凸轮上最高点落下,使上下簧片又分开,完成一次电接。这中间任何一个环节出现问题都能使上下簧片不接触或无效接触,造成此故障现象。以此分析该风速表,用手快速拨动风杯,风速电接簧片接触正常。慢速拨动风杯就发现风轴在转而蜗轮不转。原来是厂家出厂前安装失误,使风轴齿与蜗轮齿似联非联。风速快,能勉强带动蜗轮转;风速慢,蜗轮就与风轴齿离开不转,致使电接簧片不接触。调整风轴与蜗轮两齿的间隙后,故障消除。
简介:目的:观察小鼠艾灸血清体外对EL-4淋巴瘤细胞Fas、bcl-2mRNA及蛋白表达的影响。方法:采用小鼠艾灸血清培养EL-4淋巴瘤细胞24h后,应用原位杂交方法检测EL-4细胞Fas、bcl-2mRNA的表达,免疫细胞化学方法观察Fas、bcl-2蛋白表达。结果:与正常小鼠血清比较,艾灸血清培{f-EL-4细胞后,在bcl-2mRNA及蛋白水平上,阳性细胞百分率均明显降低(P〈0.05),在FasmRNA及蛋白水平上,阳性细胞百分率均明显升高(P〈0.05)。结论:艾灸血清能够下调EL-4细胞bcl-2mRNA及蛋白的表达,上调FasmRNA及蛋白的表达。
简介:ThesuccessivefoundingofELTmailinglistssincethemid-90shaveprovidedlanguageteachersworldwidewithacheap,ef-ficientandinformativeteachingtool.Thispaperoffersanintro-ductiontothemajorELTlistsandadiscussionofthesignifi-canceofthemailingliststoourteachingwork,academicre-searchandself-development.Adviceisalsogivenonhowtotakebetteradvantageofthispowerfuleducationalinstrument.
简介:ApossiblemechanismisputforwardinthispaperforElNinoeventsfromtheviewpointofplatetec-tonicsandoceanicgeology.Anumberofthedataarecitedtoillustratetheviewsthatsea-bottomvolcanicac-tivitiesandhotspringsmaycauseElNinoevents.
简介:ElNinoaswellastheSouthernOscillationisoneofthestrongestsignalsknownsofaroverclimaticnoiseininterannualvariationsoftheatmosphereandoceans.Agreatnumberofstudieshaveshowndefinitelyrelationshipsbe-tweentheeventsandclimaticanomaliesinChina.Inthisreview,observationalresultsobtainedintherecentseveralyearsarefirstsummarized.ThenthepossiblephysicalmechanismsontheinfluenceofElNinoarepresentedand,finally,theassociatedproblemsarediscussed.
简介:Inthispaper,byusingspectralmethod,themonthly-andseasonal-scaleatmosphericdiabaticheatflow(ADHF)departurefieldsarediagnosedintheperiodof1964—1985with6ElNinoyearsand6anti-ElNinoyearsovertheNorthernhemisphere(NH).TheresultsshowthatElNinophenomenahavepronouncedinfluenceontheADHFdepar-turefields.Theresponseofatmosphereexhibitsapreferredarrangementoforganizingpositiveandnegativedeparturecentersatlow,middleandhighlatitudes.Inanti-ElNinoyears,theresponsehasthesameformsasinElNinoyears,butdeparturecentersareoppositeinphase.Furthermore,ADHFdepartureshowslow-frequencyoscillationinElNinoyearsandanti-ElNinoyears.ThecenterofdifferenceindeparturebetweenElNinoandanti-ElNinoyearsdisplaysabi-monthlyoscillation.Finally,throughair-seacorrelationanalysis,itispointedoutthattheSSTanomalyisthemostimportantcauseforADHFanomaly.
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简介:EstearticulosetratadeuncomentariodelescritorMarioVargasLlosa,quientueelganadordelPremioNobeldeliteraturaenelafio2010,ylasrelacionesentreel"RealismoEstructural"yelescritor.E1articulocontieneunanālisisdealgunasobrasrepresentativasylastécnicasutilizadasenellas.Enestetrabajo,tratodeanalizarlastbr-masnarrativasutilizadasensusobras,tantolaestructuracomootrastécnicasnarrativas,múslacombinacindelorealyloficticio,conelfindedisfrutardelasartesdellenguejedeMarioVargasLlosaparadescribirunahistoriareal,enformafictional.