当前位置 —论文—写论文— 范文

关于回归分析方面论文范文参考文献,与文中英文摘要,英文摘要相关论文怎么写

本论文是一篇关于回归分析方面论文怎么写,关于文中英文摘要,英文摘要相关毕业论文的格式范文。免费优秀的关于回归分析及模型及工程力学方面论文范文资料,适合回归分析论文写作的大学硕士及本科毕业论文开题报告范文和学术职称论文参考文献下载。

uakedamagesdirectly.Thepurposeofstudyingontheinfluenceofsurfacetopographyistoexplainthereasonsforthelargeamplificationsandspatialvariationsofthegroundmotionandtopredictsomeofthefeaturesofthegroundmotionduringfutureearthquakes.Soanalysisoftheeffectoftopographyisoneofthemostimportantandattractivefieldinearthquakeengineering.Afteralotofinvestigation,wehaveknowquiteafewabouttheeffectofsurfacetopographyonpeakgroundacceleration,butparatively,theeffectofsurfacetopographyonspectrumpropertyofearthquakeisstillobscureforus.Theobjectiveofthisthesisistodiscusseffectsoftopographyonspectrumpropertyofearthquakes,throughnumericalexperimentsandresultanalysis,thefollowingproblemsareanalyzed,andsomeapplicableresultsareobtained.

1.thechoiceandanalysisofnumericalintegrationmethods

AnumericalintegrationmethodexecutedinthisthesisistheexplicitfinitedifferencemethodsuggestedbyLiXiaojunetal.foranalyzingtheearthquakeresponseoftwo-dimensionalvisco-elasticsite.Thesystematicreviewofthismethodismadeinthesecondchapter.Besides,thevirtueofthismethodisusingtheexplicitintegrationformulaalsosuggestedbyLiXiaojun.Weknowforaexplicitintegrationformula,basiccharacteristicsincludingastringency,stability,precision,dissipationandovershootcharacteristic.So,asplementarityofformerpeople'swork,dissipationandovershootcharacteristicsofthreedifferentintegrationformulasarediscussedindetail.TheconclusionsshowthattheexplicitintegrationformulasuggestedbyLiXiaojunandothershasstrongernumericaldissipationcharacteristicthantheother2formulaswhiletherealdampingvariesfrom0to1,andthelargertherealdampingis,thephenomenonismoreobvious,thiskindofformulacandepressoreliminatethehigh-frequencyinstabilityinducedbyLocalTransmittingBoundary,and,undertheconditionofthesameprecision,thiskindofformulahaslesservelocityovershootcharacteristic,soitisanidealintegrationformulaforsolvingtheearthquakeresponseofplexsite.

2.effectanalysisoftopographyonspectrumpropertyofearthquake

Surfacetopographyisplexandvarious,actually,effectoftopographyonspectrumpropertyreferstomanyfactors,suchascharacteristicdimensionsoftopography(includingheightandslopeangleetal.),charactersofsoilorrock,spectrumpropertiesofinputwavelets,angleofincidenceetal.Thesefactorscanbeclassifiedintotwosorts,charactersofsiteandcharactersofearthquake.Inordertosummarizeconveniently,firstly,wediscussedthedifferenceofspectrumpropertyofanti-planemovementundertheconditionsofdifferenttopographicfactorsanddirectionoftheincidentwaves,thenresearchexpandstomesaandvalley.Theconclusionsshowthatthepresenceoftopographicfactorsandthedirectionoftheincidentwavesnotonlysignificantlyaffectthepeakgroundaccelerationofsite,but

关于回归分析方面论文范文参考文献alsoaffectthespectrumpropertyoftheiningwaves,andtheeffectofdirectionoftheincidentwavesisespeciallyremarkable.Thestudyalsofindthatitisreasonabletoanalysespectrumpropertieswiththeinputofimpulsewaveletsinthefiniteelementsimulationofwavemotion.

3.theeffectsanalysisoftopographyonpeak-accelerationandcharacteristicperiods

Investigationsafterearthquakesshowthatsurfacetopographyaffectsthepeak-acclerationandspectrumpropertyofearthquake,so,itaffectstheshapeofdesignspectra.Considerationsoftopographiceffectsintheseismicdesigncodeforbuildingsaresuggestedinformofearthquakeforce,whileitishardforengineerstogetadjustingprojectthroughseismicdesigncodeiftheyhavetofacetopographicproblems.Inthisthesis,amodelofmesaisestablished,alotofartificialgroundmotionsaregeneratedandhavebeenusedasinputmovements,timehistoriesofobservationpointsaregained,finally,twomethods(oneissuggestedbyACT3-06andanotherissuggestedbyLiaoZhenpengandLiDahua)areusedtogetthecharacteristicperiodsofsites.Withtheseresults,theeffectsanalysisoftopographyonpeak-accelerationandcharacteristicperiodsisexecutedandcorrespondingadjustingprojectfordesignspectraissuggested.

Keywords:Surfacetopography,Spectrumpropertyofearthquake,Explicitfinite--differencemethod

作者简介:,男,年月出生,年月师从于教授,于年月获学位.

PermanentScattererInSAR)技术即永久散射体干涉合成孔径雷达技术,它是基于传统InSAR技术,对在时间序列上表现出稳定后向散射强度或相位特征的目标点进行识别,进行差分计算,以研究较长时间序列上目标点位移规律的一门技术.相比传统InSAR技术,PS技术受空间及时间失相关因素的影响极为有限,并且可以较好地消除大气影响,从而提高数据的使用效率,达到对较长时间运动事件检测的效果.然而,PS技术在理论及应用方面还存在许多问题,如PS点的有效识别,PS点三维相位分析等.受可识别天然PS点分布密度的影响,PS成功应用实例也多局限于城市,矿山地面沉降检测.本文就PS技术应用中的关键问题进行了研究,并进一步将该技术应用于无人区活动断裂带,对地震间歇期间活动断层运动引起的地壳形变进行检测研究.

对传统InSAR技术中所存在的问题进行了分析,主要包括时间去相干,空间去相干以及大气效应对InSAR技术的影响,继而对PSInSAR技术原理,优势及其发展现状作了介绍.

可靠的PS候选点是进行PS干涉处理的关键前提,本文重点对PS候选点识别方法进行研究,对已有的相干性,相位分析法,波谱差异法进行对比总结,对后向散射强度法判别条件进行发展补充,基于PS点提取方法对人工角反射器识别作了研究,并对公共主图像选取标准进行了研究.

该文地址 http://www.sxsky.net/xie/070665850.html

分析了传统InSAR相位的组分结构,对各组分的时空行为进行了

上一页 1 2 3 4 5 6 7 8 9 10 下一页