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500 个结果
  • 简介:Stressrelaxationandattenuationoffluid-saturatedsandstoneatlowfrequencyDao-YingXI(席道瑛),Ai-WenLIU(刘爱文)andWeiLIU(刘卫)(Universityo...

  • 标签: SANDSTONE saturated FLUID ATTENUATION
  • 简介:在现在的学习,一个计算液体动力学工作被执行在超声的潮湿的空气喷气由冷凝作用调查冲击波的出现。不稳定的、可压缩的axisymmetric海军司烧方程被TVD(减少的全部的变化)解决在这研究的计划。数字模拟为低压力比率和各种各样的湿度被执行了。结果为低压力比率在超声的潮湿的空气喷气看冲击波的出现马赫磁盘什么时候不发生,取决于空气的湿度。

  • 标签: 空气喷射 超音速 冲击波 潮湿 STOKES方程 计算流体动力学
  • 简介:Thedensityofasphaltwasmeasuredwiththepycnometeranddensitometer.Creeppropertiesoftheasphaltwereinvestigatedwiththebendingbeamrheometerattemperaturesrangingfrom0℃to-36℃.Theasphaltdensitydatausedtocorrelatewiththecreeppropertieswerecalculatedfromtheregressionequationofdensityandtemperature.TheasphaltsampleusedtodeterminethecreeppropertywasagedbythestandardRTFOTtestandthePAVtest.Thetestresultsshowedthattheasphaltdensityhadalinearrelationshipwithtemperaturechanges.Thelogarithmofthecreepstiffnessandtheslopeofthelogarithmofthestiffnessat60secondsalldemonstratedalinearrelationshipwiththedensity,andtheregressioncoefficientofthesedatawasaround0.99.Thecreepstiffnessandtheslopeofthecreepstiffnesscanbecalculatedfromtheasphaltdensityatthesametemperature.

  • 标签: 光密度计 蠕变性能 沥青 低温 弯曲梁流变仪 温度范围
  • 简介:Inthispaper,weinvestigateexcitedcharacteristicoftheweaklyinteractingquasi-one-dimensional(1D)andquasi-two-dimensional(2D)Bose–Einsteincondensation(BEC)inharmonicpotentialtrap.Theenergyspectrumandtheanalyticalexpressionofthesoundvelocityareobtainedandanalyzed.Comparedwith3-DimensionalhomogeneousBose-condensedgasoccasion,thesoundvelocityof2DBose-Einsteincondensationinharmonicpotentialtrapissmaller.

  • 标签: 玻色凝聚 集体激发 气体 爱因斯坦凝聚 低维 简谐势阱
  • 简介:Researchsituationofeco-designisanalyzed,andthenthoughtsandmethodsofeco-designarediscused.Theeco-designincludespackagingmodularization,dematerialization,energy-savingandbio-simulation.

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  • 简介:Alightpurplishredsapphireisheattreatedinanairtightcrucible.Thesamplechangeslittleincolorafterreceivingheattreatmentat1100°C,butturnstolightblueandblueafterbeingtreatedat1200°Cand1300°C,respectively.Beforeheating,theUV-VISabsorptionspectraofthesamplearedominatedbythe551nmbroadabsorptionbandcontributedbythed-electrontransition~4A_2→~4T_2ofCr~(3+).Afterheating,theUV-VISabsorptionspectraaredominatedbythe563nmbroadabsorptionbandcontributedbytheintervalencechargetransferofFe~(2+)-Ti~(4+).ThexrayphotoelectronspectroscopytestrevealsthattheFe~(2+)andTi~(4+)ioncontentsincreasewithincreasingtemperature.ThesapphirechangingfromlightpurplishredtoblueintheheatingprocessisowingtothefactthattheFe~(2+)andTi~(4+)contentsgrowandtheintervalencechargetransferofFe~(2+)-Ti~(4+)selectivelyabsorbsUV-VISlight.

  • 标签: 低温热处理 蓝宝石 紫红色 紫外-可见吸收光谱 X射线光电子能谱 加热过程
  • 简介:介绍最佳被设计互补金属氧化物半导体活跃象素传感器。在这个传感器中,使用是作为恢复在传统的传感器中代替NMOSFET的PMOSFET晶体管。基于0.25m互补金属氧化物半导体技术与在一样下面的传统的活跃象素传感器相比调节,模仿新结构设备更高举办的结果表演signal-to-noise比率,更宽的输出秋千,更宽的动态范围和更快的读出加速。

  • 标签: APS 复位晶体管 低电压 传感器
  • 简介:除了在1-slim,解决方案Ut(x)为所有起始的值在牛肉熏香肠空格与一个向量领域联系了的作者构造设置了并且获得向量领域与低整齐是未必围住的一个斜伴随的操作符和非线性的部分的和的1-quasi-sure流动性质,也就是单一的可辨性。而且,在答案导致的牛肉熏香肠空间的转变下面的能力的等价被获得。

  • 标签: 关联 WIENER空间 向量场 UT斯达康 转化能力 矢量场
  • 简介:Inthisresearch,theFactorAnalysismodelofmeasuringprovinciallowcarbondevelopmentinChinahasbeenconstructed.Basedondatafrom30provinces,anempiricalstudywasdevelopedtomeasurecomprehensivelowcarbondevelopmentusingtheFactorAnalysismodel(PrincipalComponentsmethodandNormalizedVarimaxRotation).Theresultsrevealthattheprovincialmarksoflowcarbondevelopmentaregenerallylowandonlynineprovinceshavehighmarks(morethan0.80).Theresultsalsoshowsignificantregionaldisparity.TheprovincialmarksoftheeasternregionarehigherthanboththemiddleandwesternprovincesofmainlandChina.Alloftheprovinceswithhighmarks(morethan0.90)arelocatedintheeasternregion,andthosewiththelowestmarks(0.60)arelocatedinthemiddleregion.Furthermore,regionaldisparityinlowcarbondevelopmentfollowsthesamepatternaseconomicdevelopmentinChina.Finally,somesuggestionsfordecision-makersarepresented.

  • 标签: 中国大陆 低碳 综合评价 因子分析模型 主成分分析法 东部地区
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  • 简介:有绗维素酶的帮助的chitosan(72.05%的DD)的降级在45的条件下面被执行,pH5.0并且1:15(chitosan/enzyme)的比率。结果证明绗维素酶能降级chitosan高效地。chitosan的粘性很快速被减少,减少释放的糖在降级期间与时间被增加。由使用膜,水解作用混合的分离被学习。蛋白质的拒绝能被到达是low-molecular-weightchitosans的99.74%.65.9%是不到2kDa。chitosan被发现比chitosan和发射度好的low-molecular-weight的溶解度能到达是在pH的全部范围的超过95%113。

  • 标签: 壳聚糖 纤维素酶 准备工作 隔膜
  • 简介:Thekillinglogarithmsindexinkillingavegetativeforminanexplosureofabout90sandasporeinanexplosureofabout120s,byusingalow-temperatureplasmaproducedbydielectricbarrierdischarge(DBD),reached5.Thespeedinkillingthestrainstested,byusingalow-temperatureplasma,wasthehighestwithE.Coli,thenS.AureusandB.Subtilisvarnigerspore.Theresultsofthescanningelectronmicroscopeshowedthatthelow-temperatureplasmadestroyedtheouterstructureofthebacteriaandthatthevegetativeformwasmoresusceptibletotheinactivationeffectofthelow-temperatureplasmathanwasthespore.Thisindicatedthattheeffectsofthehighvoltageandhighvelocityparticleflow,inplasma,penetratingthroughtheouterstructureofthebacteriamightplayadominantroleduringtheinactivationofthebacteria.

  • 标签: 低温等离子体 细菌 生物失活效应 放电效应 营养体型 孢子
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  • 简介:摘要:进入二十一世纪以来随着科学技术的进步以及社会经济的发展,各行各业也迎来许多机遇和挑战。在建筑行业发展过程当中,由于人们生活水平的提升,环保节能的理念逐步深入民心。LOW-E玻璃作为主要的节能建筑材料之一,近年来逐步成为研究热点。本文主要对LOW-E玻璃的工艺和节能应用进行分析。

  • 标签: LOW-E 玻璃 真空磁控溅射工艺 节能原理 应用
  • 作者: Hang Zhou Hua Zhuang
  • 学科: 建筑科学 > 市政工程
  • 创建时间:2023-11-25
  • 出处:《城镇建设》 2023年第18期
  • 机构:(1. Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an 710075; 2. Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd. Xi'an 710075; 3.Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources Xi'an 710075, China; 4.Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi'an 710075, China;5. Land Engineering Technology Innovation Center, Ministry of Natural Resources,Xi'an 710075)
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