简介:随着铁路运输的大面积提速,在黔桂线扩能改造工程中普遍采用了ZYJ7+SH6牵引分动外锁闭提速道岔。通过对该类型道岔在部分新开车站使用过程中,频繁发生卡阻故障的原因分析,采取保证安装质量、合理调整道岔、改造心轨钩锁、加强部门配合、完善监护管理等措施,有效降低了分动外锁闭道岔的卡阻故障率。
简介:TheobjectiveofthisresearchwastoexamineifcertainstrainsofBacillusbacteria,couldsurviveindrypowderproductsandifso,couldthebacteriadegradeorganiccontaminantsinsalinewastewateronaship.Aspartofthestudy,weisolated7domesticatedstrainsnamedNY1,NY2,…,andNY7,thestrainNY6showedtohavethebestperformancefororganicmatterdegradationandcouldsurviveindrypowdermorethan3months.NY6wasidentifiedasBacillusaerius,basedonthemorphologicalandphysic-chemicalproperties.Itsoptimalgrowthconditionswereasfollows:salinitywas2%;temperaturewas37℃;pHwasin6.5-7.0;bestratioofC:N:Pwas100:5:1.ThecapabilityofitsdrypowderforChemicalOxygenDemand(COD)removalwas800mgCOD/ginsynthesizedmarinewastewaterwith2%salinity.Thesporesinthedrypowderwere1.972×108g-1.