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简介：本文详细论述了高速接入技术的热点---CableModem技术的概念、特点、工作方式、技术标准及实际应用,着重从Internet高速接入方面作了介绍,并指出该技术蕴含的巨大发展潜力。

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简介：本文较为详细地介绍了如何通过wingate代理软件,来共享cablemodem宽带上网的安装与配置操作.因它源于实践中摸索出的经验,因此具有较好的实用价值.

简介：Theapproximateeigenfrequenciesforthein-planevibrationsofacablestruc-tureconsistingofinclinedcables,togetherwithpointmassesatvariouspointswerecom-puted.Itwasdiscoveredthattheclassicaltransfermatrixmethodwasinadequateforthistask,andhencethelargerexteriormatriceswereusedtodeterminetheeigenfrequencyequation.Thenpredictionsofthedynamicsofthegeneralcablestructurebasedontheasymptoticestimatesoftheexteriormatricesweremade.

简介：TheREapplicationinaluminumbasealloy,auniquebranchofREapplicationinmetallurgyinChi-na,hasdevelopedrapidly.Boththeoutputandtech-niqueareinaleadingpositionintheworld.Particular-ly,theREapplicationinpowertransmissioncablehasmadeaconsiderableprogress.UptonowChinacanfabricatethreekindsofRE-containingconductors.Oneisahighconductivitycon-ductor;theothertwoarehighstrengthandheat-re-

简介：Boththeinplaneandout-of-planetransversevibrationsofaviscoelasticcablesubjectedtoaninitialstressdistributinguniformonthecrosssectionarestudied.Theconstitutionofthecablematerialisas-sumedtobeofthehereditaryintegraltype.Thepartialdifferential-integralequationsofmotionarederivedfirst.ThenbyapplyingGalerkin’smethod,thegoverningequationsarereducedtoasetofsecond-ordernon-lineardifferential-integralequationswhicharesolvedbyfinitedifferencenumericalintegrationprocedures.Finally,theeffectsoftheviscosityparameterandtheelaslicparameteronthetransientamplitudesofthefirstmodeareinvestigatedbynumericalsimulation.

简介：在过去的地震基于海底的电报的表演，在海床差错运动下面决定电报性能的一个分析方法在这篇论文被建议。首先，海底的电报的地震损坏的普通类型被总结，它包括差错运动，海底的山崩和海床土壤液化导致的海床排水量，等等。损坏类似于观察到跟随陆地地震的埋葬的管道的损坏。2006年12月26日的Hengchun地震被用作案例研究。M7.2地震在20:26北京时间在华南海发生了，并且引起了14国际海底的电报切断并且碎。结果证明建议方法预言类似于在Hengchun地震观察了那的损坏。基于水深度和海底的地震的大小的影响的参量的研究，阻止损坏到海底的电报的反措施被建议。

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简介：AsimplifiedfragilityanalysisoffantypecablestayedbridgesusingProbabilisticRiskAnalysis(PRA)procedureispresentedfordeterminingtheirfailureprobabilityunderrandomgroundmotion.Seismicinputtothebridgesupportisconsideredtobeariskconsistentresponsespectrumwhichisobtainedfromaseparateanalysis.Fortheresponseanalysis,thebridgedeckismodeledasabeamsupportedonspringsatdifferentpoints.Thestiffnessesofthespringsaredeterminedbyaseparate2Dstaticanalysisofcable-tower-decksystem.Theanalysisprovidesacoupledstiffnessmatrixforthespringsystem.Acontinuummethodofanalysisusingdynamicstiffnessisusedtodeterminethedynamicpropertiesofthebridges.Theresponseofthebridgedeckisobtainedbytheresponsespectrummethodofanalysisasappliedtomultidegreeoffreedomsystemwhichdulytakesintoaccountthequasi-staticcomponentofbridgedeckvibration.Thefragilityanalysisincludesuncertaintiesarisingduetothevariationingroundmotion,materialproperty,modeling,methodofanalysis,ductilityfactoranddamageconcentrationeffect.ProbabilityoffailureofthebridgedeckisdeterminedbytheFirstOrderSecondMoment(FOSM)methodofreliability.Athreespandoubleplanesymmetricalfantypecablestayedbridgeoftotalspan689m,isusedasanillustrativeexample.Thefragilitycurvesforthebridgedeckfailureareobtainedunderanumberofparametricvariations.Someoftheimportantconclusionsofthestudyindicatethat(i)notonlyverticalcomponentbutalsothehorizontalcomponentofgroundmotionhasconsiderableeffectontheprobabilityoffailure;(ii)groundmotionwithnotimelagbetweensupportexcitationsprovidesasmallerprobabilityoffailureascomparedtogroundmotionwithverylargetimelagbetweensupportexcitation;and(iii)probabilityoffailuremayconsiderablyincreaseforsoftsoilcondition.

简介：这篇文章讨论动态州的分析在水下拖引电缆线当拖引轮船在成为寓言的一个方向改变它的速度时，介绍路径。一个三维的模型在水下拖引的系统被学习。为系统的确定的管理方程用中央含蓄的有限差别的方法被解决了。获得的差别非线性的联合方程被牛顿鈥檚方法解决，令人满意的结果被完成。这个问题的答案在动态装载和运动的评价有实际重要性，并且因此它对安全的改进和有效性直接适用近海活动。

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简介：Three-dimensionalnonlinearaerodynamicstabilityanalysiswasappliedtostudytheaerodynamicstabilityofacable-stayed-suspension(CSS)hybridbridgewithmainspanof1400meters,andtheeffectsofsomedesignparameters(suchasthecablesag,lengthofsuspensionportion,cableplanearrangement,subsidiarypiersinsidespans,thedeckform,etc.)ontheaerodynamicstabilityofthebridgeareanalyticallyinvestigated.Thekeydesignparameters,whichsignificantlyinfluencetheaerodynamicstabilityofCSShybridbridges,arepointedout,andbasedonthewindstabilitythefavorablestructuralsystemofCSShybridbridgesisdiscussed.

简介：1前言近年来,宽带接入在国内蓬勃发展,如电信的ADSL、长城宽带的以太接入、广电的CM接入及无线接入.对于各种接入方法的优劣,很多文章做了大量的介绍,在此不多做介绍.各行各业携各自的接入优势,均想在宽带接入市场上占有一席之地.

简介：Manyanimalsandplantshavehighpotentialtoserveasconceptgeneratorsfordevelopingbiomimeticmaterialsandstructures.Wepresentsomeideasbasedonstructuralandfunctionalpropertiesofplantsandanimalsthatledtothedevelopmentoftwotypesofbiomimeticcableentrysystems.Thosesystemshavebeenrealizedontheleveloffunctionaldemonstrators.

简介：为与不同装载计算打电报的结构的压力和紧张状态的一个理论模型在这份报纸被开发了。我们解决这个问题为第一--?并且有张力或弯曲的紧张的秒阶段电报。在海滨之间的接触和磨擦力量被二维的接触模型介绍。当三位字节使遭到了到张力的紧张时，几个理论模型被建议了验证结果，包括接触力量，接触压力，和机械损失。装载将影响磨擦力量和三位字节的机械损失，这被发现。结果证明接触力量和机械损失依赖于扭曲沥青。更短的扭曲程度能导致更高的接触力量，当有扭曲沥青的机械损失的趋势是复杂的时。机械损失可以被相当调整扭曲沥青减少。现在的模型提供一个简单分析方法调查机械行为在在不同负担下面多级式结构。