简介:H3,ahomogeneousacidicpolysaccharidewasobtainedfromtheseedsofCuscutachinensisLam.Itsstructurewascharacterizedforthefirsttimebychemicalandspectroscopicmethodstobeahighlybranchedheteropolysaccharidewithmeanmolecularweightofmorethanlxl0^6.Itwascomposedof1,6-1inked-β-DGalp,1,4-linked-β-DGalp,1,4-1inked-β-DGalA,1,3,6-1inked-β-DGalpand1,2,4-1inkedRhap,withbranchingpointsatO-2or0-4of1,2,4-1inkedRhapand0-3of1,3,6-1inked-β-DGalp.Itssidechainsincluded1-1inkedAraf,1,5-1inkedArafand1,3,5-1inkedArafatO-3of1,6-1inkedGalpinthemainchain.
简介:用maghnite-H+的tetrahydrofuran的cationic戒指洞聚合被报导。Maghnite-H+,从质子发出的无毒的稳固的催化剂被交换montmorillonite泥土。Polytetrahydrofuran,也poly打电话(butandiol)醚,与醋酸盐和氢氧根结束,组们成功地被综合。反应温度,开始者/单体的重量比率和单体的变换上并且在分子的重量上的反应时间的效果被调查。反应的cationic机制被建议。这化学能为poly准备被看作一条合适的线路(THF)作为为热塑的弹性体的一个软片断。
简介:ConstructingareasonablereactionkineticmodelforCr-containingwasteincinerationisofhighsignificancetostudytheeffectofvariousfactors,suchastemperature,Cl,onitshexavalentchromiumcompounds.Inthispaper,aprimaryCr/H/Air/ClreactionkineticmodelisbuiltandstudiedbyGaussian03codewithquantumchemistrytheory.Numericalresultsshowthattherearetwooverallreactionsinthemodel,eachofthetwooverallreactionsconsistsoftheirrespectivetwoelementaryreactions.Sothetwooverallreactionsshouldbeomittedfromthemodel.Instead,thefourelementaryreactionsshouldbeaddedintheCr/H/Air/Clreactionkineticmodel.Theactivationenergiesofthefourelementaryreactionsarealsocalculated.
简介:这篇论文由使用可得到的加速大小在模型参数与不确定性为结构的系统论述一条柔韧的H_∞输出反馈控制途径并且为如此的一个柔韧的输出反馈控制器的存在建议条件。结构的僵硬的不确定性,抑制并且集体参数被假定围住标准。建议控制途径在线性矩阵不平等,存在凸的优化技术例如在MATLAB的LMI工具箱,能有效地并且方便地为被使用的框架以内被提出。说明建议的柔韧的H_∞策略的有效性,一座六故事的大楼两个都受到1940ElCentro地震记录并且到突然应用的Kanai-Tajimi过滤白噪音随机刺激。结果证明建议的柔韧的H_∞控制器向令人满意的结果提供或没有结构的僵硬的变化,抑制并且集体参数。