简介:摘要:在实施房屋建设项目时,多种风险和不确定因素层出不穷,如果管理不佳,可能导致项目推迟、超越预算,引发一系列负面影响。本文以识别和应对房建项目中的风险为中心,进行深入探讨。全方位识别房建项目的各项风险,包括设计、施工、合同、环境等各个环节的风险,并适当设置风险识别指标体系。通过结合定性和定量的分析手段,对众多风险因素进行影响度评估,为风险应对提供数值参考。根据风险识别和影响评估的结果,提供了一整套风险应对措施,涉及到优化设计、规范施工、强化合同管理以及环境保护等方面,意在减少风险对房屋建设项目带来的潜在损失。通过案例分析验证了风险管理策略的实际效果。研究结果对于指导房建项目的风险管理具有重要参考价值。
简介:Inthispaper,researchofaftershockmechanismsisreviewed,includingheterogeneityofmediumandstress,mechanicalloading,fluidintrusionandstresscorrosion,andratestatedependence.Previousstudieshaveindicatedthattheheterogeneityofmediaandstressisthebasicpremiseofaftershocksgenerated.Fromthepointviewofmechanics,transientcreepandafterslipcanexplainthedecayofaftershocksinashorttimeafteramainshockandtherelaxationofstresstendstointerpretthecharacteristicsoflong-termaftershocks.Fluidintrusionandstresscorrosioncontroltheevolutionprocessoftheaftershocksundercertainconditions.Theinteractionbetweenthefaultsperturbedbythemainshockalwaysexistsduringtheaftershockactivities.Allkindsofmodelsandthetheorieswanttocomplywiththetwobasicpower-lawrelationships---theG-RlawandOmorilawtosomeextent.
简介:重要努力在在水泥揭示thaumasite形成的机制被作了,它继续与歧义和纠纷是充满的。化学方法被采用综合纯C3S,C2S,C3A,ettringite,和thaumasite,和X光检查衍射(XRD),拉曼光谱学和红外线的光谱学(红外)被用来从另外的水合物识别thaumasite。调查thaumasite形成的直接线路,C3S,C2S,石膏,和钙碳酸盐被用来准备水泥粘贴以便ettringite形成的干扰能被避免。thaumasite形成的间接线路被考虑C3thaumasite上的A或ettringite内容形成。结果证明那个thaumasite罐头毫无疑问在适当条件下面当忍受铝的矿物质或ettringite不在时被产生,当ettringite存在支持thaumasite形成时。没有证据在这个工作支持异构的成核线路。方法在这提到工作能肯定被用来调查thaumasite形成的机制,这被结束,并且thaumasite能形成由直接并且woodfordite线路。
简介:The"ShanghaiFive"mechanismwasborninApril1996whentheRepublicofKazakhstan,thePeople’sRepublicofChina,theKyrgyzstanRepublic,theRussianFederationandtheRepublicofTajikistanheldasummitmeetinginShanghai.China.Thereaftertheyholdsummiteveryyearandeachofthemplayhostinturn.TheDushanbeSummitofJuly5,2000wastheirfifthmeeting.AfterfivesummitsfiveheadsofstateextensiveIyexchangedViewsofcommonconcern,and
简介:Organicconductorisakindoforganiccompoundwhichhasspecialelectronicandmagneticproperties.Theresearchoftheorganiccompoundshasreceivedconsiderableattentionbecauseoftheirpotentialapplicationsinmanyareas.Themolecularconductiveunitsaretheoreticallyinvestigatedaswellastheirenergygapandchargedistribution.Therelationshipofconductivityandmicro-mechanismisdiscussed.
简介:Carbon-containingrefiactoriesareeasilyoxidizedathightenperature,thusmakingserviceliferapidlydrop.Theanti-oxidationmethods,suchasimpregnationandaddinganti-oxidatonagents,can'tmeettherequire-mentsofindustry'sdevelopmentandsomespecialcases,Byanalyzingthecharcteristicsofseveraloxidesandnon-oxidesrawmaerials,theoxidationresistantmechanismoftherefractoryanti-oxidationcoatings(RAOC),whichpossessthecharacteristcofself-healingathighttemperature,isdiscussed.