学科分类
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7 个结果
  • 简介:Thephotochemicalpropertiesofpolypropylviologen(PPrV)-cationexchangeableresincomplexeswerestudies.Thecolorofthesecomplexeschangedtobluewhenirradiatedbyamercurylamp.UVandESRstudiesindicatedthatanefficientviologenradicalaccumulationoccursinPPrV-resincomplexes.Anexplanationforthestablephotoinducedredicalaccumulationisproposed.

  • 标签: 光化学 稳定光诱导自由基积累 PPrV-阳离子交换树脂络合物
  • 简介:Thereexiststrongmultipatheffectsinashallowwateracousticchannel.Thepaperdiscussessomeoftheseimportanteffects.Thestati-sticalcharacteristicsofmultipathinshallowwaterarefirstdescribed,thentheanti-multipathabilityofDTCAschemeisanalysed.TheoreticalestimationsandfieldexperimentshaveprovedthatbothDTACAandDTCCAhaveahighabilityofanti-multipathandevenmakeuseofthemultipathenergy.

  • 标签: MULTIPATH correlative shallow REPETITION transmitted analysed
  • 简介:Numericalsimulationofcarefulparallelarithmeticofoilresourcesmigration-accumulationofTanhaiRegion(three-layer)wasdone.Carefulparalleloperatorsplitting-upimplicititerativescheme,parallelarithmeticprogram,parallelarithmeticinformationandalternating-directionmeshsubdivisionwereputforward.ParallelarithmeticandanalysisofdifferentCPUcombinationsweredone.Thisnumericalsimulationtestandtheactualconditionsarebasicallycoincident.Theconvergenceestimationofthemodelproblemhassuccessfullysolvedthedifficultprobleminthefieldsofpermeationfluidmechanics,computationalmathematicsandpetroleumgeology.

  • 标签: 混合计算 平行算法 偏微分方程 迭代序列 土壤沉积结构
  • 简介:β-glucanisoneofthemostimportantsourcesofcellwallinyeaststrains(Saccharomycescerevisiae).Itisnowknownthatβ-glucannotonlyexhibitsabroadspectrumofbiologicalactivitiesincludingimmune-modulating,anti-inflammatory,anti-cancer,andanti-agingproperties,butalsocanbeusedinfoodproductionasmoisturizer,dietaryfibers(DF)[1].Therefore,itisimperativetobreedyeaststrainswithhigherbiomassproductionandoptimizethefermentationprocess.Saccharomycescerevisiaeneedscarbonsourcesinbiomassaccumulation,butglucoseisexpensiveinindustrialfermentation[2].TheaimofthisstudyistoevaluatethedifferentcarbonsourcesonthegrowthofSaccharomycescerevisiae.

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  • 简介:在骨头的Microdamage累积在破裂过程期间是为精力驱散的机制之一。在骨头成分的超微结构和作文的变化能由于老化或疾病影响microdamage累积。钠氟化物(NaF)的低集中(1mM)在这研究被使用了在跟随免费秋天的影响装载的老鼠胫骨在microdamage累积上调查ultrastructural变化的效果。22根胫骨随机被划分成控制和对待NaF的组。装载的免费秋天的影响在每根胫骨上被进行两次生产microdamage。对待NaF的胫骨的有弹性的模量在影响装载以后显著地减少了,当在未经治疗的样品在之间的模量没有重要差别时预先损坏并且损坏以后的装载。Microdamage形态学分析少些显示出那,更短的microcracks与控制骨头相比在对待NaF的胫骨存在。同时,更多和更长的microcracks在压缩区域与那相比在未经治疗的样品在张力的区域被观察,而没有重要差别在对待NaF的骨头在张力、压缩的区域之间被观察。这研究的结果显示更多的精力被要求比在正常骨头在对待NaF的骨头产生microcracks。氟化物处理的低集中可以在装载的影响下面增加骨头的坚韧。这研究在ultrastructural的效果上集中了的图形的摘要在影响装载下面在骨头在microdamage上变化。对待NaF的胫骨的有弹性的模量在影响装载以后显著地减少了。更少和更短的microcracks在对待NaF的胫骨骨头存在。更多的精力被要求在对待NaF的骨头产生microdamage。氟化物处理的低集中可以增加骨头的坚韧。

  • 标签: 冲击载荷作用 损伤积累 胫骨 小鼠 氟浓度 超微结构变化
  • 简介:Fromsuchactualconditionsastheeffectsofcharacteristicsofmiltilayerpetroleumgeologyandpermeationfluidmechanics,anewnumericalmodelisputforwardandcouplingsplitting-upimplicitinteractiveschemeisformed.FortheactualsituationofDongyinghollow(four-layer)andTanhairegion(three-layer)ofShengliPetroleumField,thenumericalsimulationtestresultsandtheactualconditionsarecoincident.

  • 标签: 数值模拟 并行算法 多层结构 胜利油田 石油形成