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211 个结果
  • 简介:Grounddeformationmaybecausedbycrustalmovementandnon-crustalmovement.Thenon-crustalmovementsincludethosecausedbytemperature,rainfall,groundwater,etc.Deformationcausedbycrustalmovementincludesseismogenicdeformation(thatappearingintheprocessofearthquakepreparationandthatdirectlycausedbytheearthquake)andgeneraltectonicactivities.Thekeypointinthestudyoftherelationshipbetweengrounddeformationandearthquakesishowtoeliminateinformationofdeformationcausedbynon-crustalmovementandpermanent(orslow)tectonicdeformationinobserveddata.InthispaperananalysisismadeontheshortlevelingdatarecordedatDahuichangDeformation-ObservingStation,Beijing,for22years(1970-1991)byusingtheLMSalgorithmmethodafterlateraladaptivefilteringofthemoderndigitalsignalprocessingtechnique.Eliminatingtheapproximateannualvariationindeformationcausedbynon-crustalmovementsuchastemperature,rainfall,groundwater,etc.,aunifiedstandardis

  • 标签: adaptive FILTERING SEISMOGENIC DEFORMATION PERMANENT TECTONIC
  • 简介:Onetypeofaerialcablewayconsistsofacontinuouscable,whichworksatthesametimeascarryingcableanddrawingcable.Thiskindofcablewayissupportedbymanytowers,whichdividethetotallengthinlinearsections.Evensmalldeviationsfromtheplanedlayoutcanincreasethestrainofthecableandthedangerofderailments.Thedeviationsofthepositionofthetowersfromtheplanedlayoutareduetolocalslidingorsinkingofthefoundationorothermechanicalmovements.Uptonowtheaxisofthecablewayswereperiodicallymeasuredbytraditionalmethods.ThegoalofthisprojectistodemonstratethepossibilityofmeasuringtheaxisofacablewaywithGPStechniques,whilethecableismoving.Theresultsshowthattheproposedmeasuringdeviceprovidespreciseresultsinasimpleandreliableway.

  • 标签: 缆道变形监控 动力监控 卫星大地测量
  • 简介:SufficientconditionsweregiventoassertthatbetweenanytwoBanachspacesoverK,Fredholmmappingsshareatleastonevalueinaspecificopenball.Theproofoftheresultisconstructiveandbaseduponcontinuationmethods.

  • 标签: 规则值 延续法 连续依赖定理 紧凑映射
  • 简介:Theballoon-basedcathetersareattractivefortheminimallyinvasiveproceduresbecausethesecatheterscanbeconfiguredtomatchrequirementsonsizeandshapefortheinteractionwiththesofttissue.Ananalyticalmechanicmodelisdevelopedforthedeformedballoontodeterminetheshapeoftheinflatedcatheter.Thebridgesalonglatitudinaldirectionshouldbehighstretchableduetothehighelongationalongthelatitudeoftheinflatablecatheter.Theseresultsagreewellwiththefiniteelementmethodwithoutanyparameterfitting.

  • 标签: 球囊导管 有限变形 有限元方法 相互作用 力学模型 高伸缩性
  • 简介:Whethertheconceptofeffectivestressandstraininelastic-plastictheoryisstillvalidundertheconditionoffinitedeformationwasmainlydiscussed.Theuni-axialcompressionexperimentsinplanestressandplanestrainstateswerechosenforstudy.Inthetwokindsofstressstates,thestress-straincurvedescribedbylogarithmstrainandrotatedKirchhoffstressmatchestheexperimentsdatabetterthanthecurvesdefinedbyotherstressstraindescription.

  • 标签: 有效压力 有效张力 有限变形 弹塑性理论 固体力学 体积不变性
  • 简介:Thissurveyreviewstherecentdevelopmentofgradientdomainmeshdeformationmethod.Differenttootherdeformationmethods,thegradientdomaindeformationmethodisasurface-based,variationaloptimizationmethod.Itdirectlyencodesthegeometricdetailsindifferentialcoordinates,whicharealsocalledLaplaciancoordinatesinliterature.BypreservingtheLaplaciancoordinates,themeshdetailscanbewellpreservedduringdeformation.DuetothelocalityoftheLaplaciancoordinates,thevariationaloptimizationproblemcanbecastedintoasparselinearsystem.Fastsparselinearsolvercanbeadoptedtogeneratedeformationresultinteractively,oreveninreal-time.Thenonlinearnatureofgradientdomainmeshdeformationleadstothedevelopmentoftwocategoriesofdeformationmethods:linearizationmethodsandnonlinearoptimizationmethods.Basically,thelinearizationmethodsonlyneedtosolvethelinearleast-squaressystemonce.Theyarefast,easytounderstandandcontrol,whilethedeformationresultmightbesuboptimal.Nonlinearoptimizationmethodscanreachoptimalsolutionofdeformationenergyfunctionbyiterativeupdating.Sincethecomputationofnonlinearmethodsisexpensive,reduceddeformablemodelsshouldbeadoptedtoachieveinteractiveperformance.Thenonlinearoptimizationmethodsavoidtheuserburdentoinputtransformationatdeformationhandles,andtheycanbeextendedtoincorporatevariousnonlinearconstraints,likevolumeconstraint,skeletonconstraint,andsoon.Wereviewrepresentativemethodsandrelatedapproachesofeachcategorycomparativelyandhopetohelptheuserunderstandthemotivationbehindthealgorithms.Finally,wediscusstherelationbetweenphysicalsimulationandgradientdomainmeshdeformationtorevealwhyitcanachievephysicallyplausibledeformationresult.

  • 标签: 梯度 网孔变化 测量 变形方法
  • 简介:Itisachallengingproblemofsurface-baseddeformationtoavoidapparentvolumetricdistortionsaroundlargelydeformedareas.Inthispaper,weproposeanewrigidityconstraintforgradientdomainmeshdeformationtoaddressthisproblem.Intuitivelytheproposedconstraintcanberegardedasseveralsmallcubesdefinedbythemeshverticesthroughmeanvaluecoordinates.Theuserinteractivelyspecifiesthecubesintheregionswhicharepronetovolumetricdistortions,andtherigidityconstraintscouldmakethemeshbehavelikeasolidobjectduringdeformation.Theexperimentalresultsdemonstratethatourconstraintisintuitive,easytouseandveryeffective.

  • 标签: 网眼变形 刚性约束 平均值 拉普拉斯算子 能量最小化
  • 简介:DeformationdatuminsourcemechanisminversionSHOU-WENGONG(巩守文,QING-LIANGWANG(王庆良),YI-QINGZHU(祝意青)andBINGCHEN(陈兵)(SecondCrustalDe...

  • 标签: DEFORMATION DATUM FOCAL mechanism INVERSION LEVELLING
  • 简介:Greatearthquakesoftenoccuralongornearactivefaultbelts.Thus,monitoringandresearchonfaultdeformationarequiteimportant.Methodssuchasshort-leveling,shortbaselineandintegratedmonitoringprofileacrossfaultbeltshavebeenusedtomonitorfaultactivitiesformanyyears.GNSSobservationsaremainlyusedtoobtainthehorizontalvelocityfieldinlargeareasandtostudytheactivitiesanddeformationofmajorblocks.GNSStechnologyhasbeenusedtomonitorandstudythedeformationoffaultsfromadifferentaspects.Inthispaper,someapplicationsandnewexplorationsofGNSSarediscussed.Theyare:(1)Researchandmonitoringofstrike-slipactivitiesoffaultswithGNSS.(2)ResearchandmonitoringofverticalactivitiesoffaultswithGNSS.(3)Investigatingthelawsofdeformationofblocksonthesidesoffaultzoneandsettingupstrainmodelstodeducetheactivitiesanddeformationoffaultswithrespectivemodelsandcomparethededucedresultswiththeactualmeasurementsacrossfault.Itisconcludedthatalargerdiscrepancybetweenthededucedandtheobserveddeformationindicatesastrongerinteractionbetweentheblocks,whichcanbeimportantforpredictingthelocationofastrongearthquakeandassessingseismichazard,aswellastheseismicitytrend.

  • 标签: 全球导航卫星系统 断层形变 应用 监测信息 GNSS 地震活动趋势
  • 简介:Thenaturalgabbrosamplesweredeformedattemperaturerangingfrom700to1150°Cwithstrainratestepsof1910-4,2.5910-5,6.3910-6s-1.Themechanicaldatashowthatsampleexperiencesgradualtransitionfromsemi-brittleflowtoplasticflow,correspondingtoasystematicallydecreasingstressexponentnwiththeincreasingtemperaturerangingfrom16.5to4.1(Heetal.SciChina(D)46(7):730–742,2003).Weinvestigatemicrostructuresanddeformationmechanismsofexperimentallydeformedgabbroundertransmissionelectronmicroscopeinthisstudy.Forlowtemperatureof700°Cto950°C,thedeformationismainlyaccommodatedwithdislocationglideandmechanicaltwinning,correspondingtostressexponentlagerthan5,whichmeanssemi-brittledeformation.Whereaswithhighertemperatureupto1000°C–1150°C,thedeformationisaccommodatedmainlywithdislocationglideandclimbcorrespondingtostressexponentof4.1,whichmeansplasticdeformation.Evidenceofdislocationclimbhasbeenfoundasdislocationwallsinplagioclase.Theobservedslipsysteminplagioclaseis(001)1/2[110]andthatinclinopyroxeneare(100)[001]and(010)[001].The(010)[001]slipsysteminclinopyroxeneisnewlyfoundinthiswork.Meltwasfoundattemperatureof950°C–1050°C.Themeltglassdistributedbothinmeltthinfilmbetweentwograinboundariesandmelttubulesoftriangularalongthreegrainboundariesattemperatureof950°C–1000°C.Themelttriangularinterconnectedtothemeltfilmattemperatureof1050°C–1150°C,wherethemeltchemicalcompositiondifferentiatedintoiron-richdarkdotsandsilicate-richmatrix.

  • 标签: 变形机制 实验变形 辉长岩 显微构造 透射电子显微镜 温度范围
  • 简介:试用被坝所围住的水从2008年9月27日在三座峡水库被继续。在Hefeng有强壮的变丑和失败()山崩当水库水水平从173m的高度下降了时。它显示变丑是仔细与水库水变化有关。为这个原因,在变丑的水库水的效果被学习,拿象在这篇文章的一个例子的Hefeng山崩。首先,强壮的变丑区域的地质的特征和变丑状况被分析透露内在的因素和在水的条件下面的变丑的模式铺平变化。第二,山崩的稳定性在升起并且下降的过程,和在水库水水平变化和山崩变丑之间的相应关系期间被计算进一步被识别。最后,渗出物领域和在井的线下面的山崩身体的力量条件被分析揭示水库水的效果。而且,为更好可渗透的水库山崩,在水库水升起期间,渗出物力量的有利效果削弱相反的效果,这能被结束高举强迫水库水升起稳定性上的小效果,和没有变丑被引起了;但是在下降水库期间流水,渗出物力量的相反的效果在uplift力量的相反的效果上被附加,它引起稳定性戏剧性地减少并且在山崩前面导致累积身体的失败。

  • 标签: 滑坡变形 水库水位 鹤峰 稳定性影响 机制 水位波动
  • 简介:Areal-valuedfunctionf(x)onЖbelongstoZygmundclassA.(Ж)ffitsZygmundnorm‖f‖x=inf,|f(x+t)-2f(x)+f(x-t)/t|isfinite.Itisprovedthatwhenf∈A*(Ж),thereexistsanextensionF(z)offtoH={Imz>0}suchthat‖Э^-F‖∞≤√—1+53^2/72‖f‖z.Itisalsoprovedthatiff(0)=f(1)=0,thenmax,x∈[0,1]|f(x)|≤1/3‖f‖x.

  • 标签: 准保角变形 展开式 连续复值函数 Zygmund类
  • 简介:山崩的变丑通常独立在水平、垂直的方向被表示。基于X,Y,从一个真实监视工程的Z坐标,造的一个方法三维(3D)由构造不规则的网络(锡)和渗出的轮廓衬里的triangulated的山崩的模型被建议。监视点的几乎细微的排水量被二种夸大的方法激增。变丑进程用3D动画技术被重放。

  • 标签: 滑坡 位移矢量 形变 三维可视化
  • 简介:包括热扩大的痊愈动力学,痊愈收缩,和系数的Prepreg性质被分析。一个模拟方法基于元素出生和有限元素分析(FEA)的死亡方法被介绍模仿切的过程并且预言用机器制造的变丑为合成把压成薄片并且使硬的面板。在模拟结果和试验性的数据之间的比较显示出好同意。剩余压力是为composites用机器制造变丑的主要来源,仅当沿着用机器制造的方向有压力坡度,用机器制造变丑被期望发生,这被发现。为没有用机器制造的变丑合成在飞机由于它的一致压力分发把压成薄片,当用机器制造时,变丑能为T形状显然被观察使硬的合成面板。注意应该对用机器制造变丑在汇编期间避免失配被给予。

  • 标签: 复合材料层压板 加工变形 仿真结果 复合材料加筋板 验证 模拟方法
  • 简介:Puretungsten(PW)andW-1wt%La2O3(WL10)werepreparedbypowdermetallurgicalroutefollowedbytheswaging+rollingprocess.Thelogarithmicstrainsare0,0.37,0.58,and0.98forWL10and0,0.58forPW.Heattreatmentswereperformedattemperaturesvariedfrom1,573to2,173Ktodeterminetherecrystallizationtemperature.Recrystallizationtemperaturesare1,973and2,173KforWL1(logarithmicstrainof0.37)andWL3(logarithmicstrainof0.98),respectively.ButinthecaseofWL2(logarithmicstrainof0.58),fullrecrystallizationisnotachievedattemperatureofabove2,173K.Furthermore,therecrystallizationtemperatureofPWwithlogarithmicstrainof0.58isatleast300KlowerthanthatoftheequivalentWL10sample.Moreover,theincreaseofrecrystallizationtemperatureinhibitsthestrengthdegradationofWL2:sampleslose4%and22%strengthwhenannealedat1,573and1,973Kcomparedwithroomtemperature(RT)sample.Finally,thetextureevolutionfortheswaged+rolledWL10issignificantlyrelatedtothedeformationdegree:thedominatedorientationis<001>forWL2while<110>forWL3.

  • 标签: 再结晶温度 变形程度 纯钨 对数应变 轧制工艺 强度退化
  • 简介:FIA广泛地被使用超过一十年了解开变丑和变形难题。因为在岩石中的组合layering总是重新激活多重变丑在哪儿发生了,Orogenic处理在历史或orogenesis挑战科学家期间早发展,几乎不离开在矩阵保存的生叶开发的历史的小证据。在科罗拉多的落基山脉的山麓丘陵,美国如果porphyroblasts没在影响了这些岩石的多重变丑事件期间成长或如果他们旋转了,当这些事件发生了,包含一直不是可区分的四个FIA集合(趋势)的继任。当变丑继续了,他们表明两变丑和isograds的地点划分显著地变化了。

  • 标签: 科罗拉多州 体制模式 变形 叶状结构 保存 变质
  • 简介:在变丑和垂直涡度趋势之间的一种数学关系被介绍frontogenesis功能和完全的垂直涡度方程造,它被潮湿的潜在的涡度的优点导出。从数学关系,适当地设置了大气的条件,这被显示出能让变丑以比得上另外的有利因素的率施加积极贡献到旋涡开发。在旋涡开发的变丑的效果自己与变丑有关不仅,而且取决于空气的当前的热力学、动态的结构潮湿的baroclinicity和垂直的风例如对流稳定性,砍(或水平涡度)。发生在20222012年7月期间的重降雨的格的诊断研究证明那变丑在它的整个生命周期期间在低旋涡的快速的发展阶段期间在垂直涡度的增加以后有最显著的效果。这个特征在对流稳定性趋于是零的空气主要由于近似的中立的层(大约700hPa)的存在。中立的层在旋涡发展阶段期间显著地在垂直涡度增加以后做变丑的效果,并且因此驱使垂直涡度增加。

  • 标签: 下线 服务 迁移