学科分类
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7 个结果
  • 简介:Inordertostudytheeffectofanti-HABsagentsonPenaeuschinensis,thetoxicityexperimentsonclay,Ca(ClO)2,FeCl3,andAlCl3toPenaeuschinensisarecarriedout.Theresultsshowthat:(1)theclayisn'ttoxictoPenaeuschinensis;(2)Ca(ClO)2hasnotoxicitytoPenaeuschinensisatlowlevels,buthasacuteandchronictoxicityathighlevels;(3)PenaeuschinensiscanaccumulateFeandAl.Thetoxiceffectneedsfurtherstudy.

  • 标签: HABs anti-HABs agents PENAEUS chinensis TOXICITY
  • 简介:根据各种各样的算法的分析,称为刷子方法的一个抗混叠算法被介绍,它是合适的印射出版标志。在详细介绍刷子方法的基本原则和实现以后,结果和效率通过实验被评估。

  • 标签: 地图编制 图像失真 电刷法 图像处理
  • 简介:一个明确的有限差别方法被执行在粘弹性的地点的地震反应上评估地形学效果的意义。真实accelerograms和地狱形状推动小浪,到来的波浪的光谱性质上的峡谷和入射角的斜坡角度都详细被讨论。结论证明地志的因素和这个事件的方向的存在不仅显著地飘动影响一个地点的山峰地面加速,而且在事件波浪的方向上影响到来的波浪,和效果的光谱性质是特别显著的。学习也发现在波浪运动的有限元素模拟与推动小浪的输入分析光谱性质是合理的。

  • 标签: 有限元模拟 光谱 地形学 地震
  • 简介:ToexplorethepolysaccharidesfromselectedseaweedsofAtlanticCanadaandtoevaluatetheirpotentialanti-influenzavirusactivities,polysaccharideswereisolatedfromseveralAtlanticCanadianseaweeds,includingthreeredalgae(Polysiphonialanosa,Furcellarialumbricalis,andPalmariapalmata),twobrownalgae(AscophyllumnodosumandFucusvesiculosus),andonegreenalga(Ulvalactuca)bysequentialextractionwithcoldwater,hotwater,andalkalisolutions.Thesepolysaccharideswereana-lyzedformonosaccharidecompositionandothergeneralchemicalproperties,andtheywereevaluatedforanti-influenzavirusactivities.Totalsugarcontentsinthesepolysaccharidesrangedfrom15.4%(inU.lactuca)to91.4%(inF.lumbricalis);sulfationlevelwasashighas17.6%inapolysaccharidefromU.lactuca,whereasitcouldnotbedetectedinanalikali-extractfromP.palmaria.Forpolysaccharidesfromredseaweeds,themainsugarunitsweresulfatedgalactans(agarorcarrageenan)forP.lanosa,F.lumbricalis,andxylansforP.palmata.Inbrownseaweeds,thepolysaccharideslargelycontainedsulfatedfucans,whereasthepolysaccharidesingreenseaweedweremainlycomposedofheteroglycuronans.ScreeningforantiviralactivityagainstinfluenzaA/PR/8/34(H1N1)virusrevealedthatbrownalgalpolysaccharideswereparticularlyeffective.SeaweedsfromAtlanticCanadaareagoodsourceofmarinepolysaccharideswithpotentialantiviralproperties.

  • 标签: 抗流感病毒 海藻多糖 化学性质 加拿大 大西洋 抗病毒性能
  • 简介:Thesignificanceofdetectionofurbanactivefaultsandthegeneralsituationconcerningdetectionofurbanactivefaultsintheworldarebrieflyintroduced.Inabriefdescriptionofthebasicprinciplesofanti-disturbanceandhigh-resolutionshallowseismicexploration,thestressisputontheexcitationofseismicsources,theperformanceofdigitalseismographs,receivingmodeandconditions,geometryaswellasdataacquisition,processingandinterpretationintheanti-disturbanceandhigh-resolutionshallowseismicexplorationofurbanactivefaults.Thestudyindicatesthatacontrolledseismicsourcewithalinearornonlinearfrequency-conversionscanningfunctionandtherelevantseismographsmustbeusedindataacquisition,aswellasworkingmethodsforsmallgroupinterval,smalloffset,multi-channelreceiving,short-arrayandhigh-frequencydetectorsforreceivingareused.Attentionshouldbepaidtotheapplicationoftechniquesforstaticcorrectionofrefraction,noisesuppressing,high-precisionanalysisofvelocity,waveletcompressing,zero-phasingofwaveletandpre-stackingmigrationtodataprocessingandinterpretation.Finally,somecasesofanti-disturbanceandhigh-resolutionshallowseismicexplorationofurbanactivefaultsarepresentinthepaper.

  • 标签: 城市活性断层 地震调查 数据采集 资料处理
  • 简介:强迫的本地哈德利循环的二数字模拟基于一个线性诊断方程被执行在不同季风区域提供卓见进季风进化的机制。一模拟为在东亚上的带的吝啬的哈德利发行量(从95掳E到122.5掳E),在印度上的另外一个(从70掳E到85掳E)。与由在北京的科学的中国学院的NCEP/NCAR重新分析数据re鈥攑rocessed,以前的模拟在1200梅·乌特克在东亚上显示一个主导的反鈥擧adley发行量模式1,1994。模仿的发行量模式是一致的与在每水平因缺乏放射信息从数据直接阴谋的发行量模式足够好。尽管在印度上的模拟不在东亚上像那一样,一个主导的哈德利发行量模式作为数据表演明显。进一步的分析证明在印度上的有缺点的模拟由于在在更低的对流层的一些格子点的静态地不稳定的状况的存在。这种情形稍微违背椭圆形的诊断方程为强迫的发行量要求的水动力学稳定性标准。因为模拟与给定的数据相比是足够可靠的,线性方程便于对内部强迫过程的各个的相对重要性的一个系统的评价。评价证明在内部进程之中,水平温度移流显然说明哈德利(反鈥擧adley)在在1200梅·乌特克的印度(东亚)上的循环1,1994除了与潜伏的热释放联系的进程。潜伏的热能的计算由于在传送对流过程和不太精确的湿度数据的不清楚的云物理是有点不可靠的。这些初步的结果与证明在上面的对流层和相应过程的季节的温暖的特征与在东亚和印度上的夏天季风的进化有关仔细是关键过程的部分的以前的研究的结果一致。关键词季风循环-哈德利循环-强迫的南方的循环这个工作被中国的鈥?公民钥匙计划为开发第1部分基本科学鈥?G1998040900支持,NSFC49675264和NSFC49875021。

  • 标签: Monsoon CIRCULATION HADLEY CIRCULATION FORCED MERIDIONAL
  • 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.

  • 标签: EL Nino and anti-El Nino ADHF