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  • 简介:目的探讨临床应用大直径球头(36mm)Delta陶瓷-陶瓷界面人工髋关节的早期结果。方法回顾分析2009年10月至2011年10月25例(25髋)采用36mm大直径球头Delta陶瓷陶瓷界面全髋假体行初次人工全髋关节置换(T}IA)治疗髋关节疾病患者的病例资料,根据术后随访Harris评分系统和影像学资料进行髋关节功能和假体情况评估,并报告术中及术后并发症。结果关节置换后切口均I期愈合,未发生假体脱位、感染。1例患者出现术中陶瓷内衬破裂。25例均获随访,时间12-36月,平均2年3个月。术前Harris评分为(52.5+5.4)分,末次随访时,Harris评分为(91.0士7.4)分,与术前比较差异有统计学意义(P〈0.05)。没有患者报告与关节相关的异响。随访期间影像学检查未见假体松动、下沉、移位及碎裂发生,骨溶解。结论大直径球头Delta陶瓷人工髋关节临床应用的早期结果满意,其陶瓷材料性能的改善和使用大头径假体可以减少关节假体磨损和脱位的发生率。

  • 标签: 全髋置换术 Delta陶瓷 大直径球头
  • 简介:ThepurposeofthispaperistogivearelativelyelementaryanddirectproofoftheDeltaInequality,whichplaysaveryimportantroleinthestudyoftheextremalproblemofquasiconformalmappings.

  • 标签: 三角不等式 证明 拟共形映射 极值问题
  • 简介:套装使您可轻而易举地做出漂亮的蚀刻样式来.该套装中不含酸、不含有害气体、不会对皮肤产生腐蚀。且该材料用肥皂水就可以清洗掉。

  • 标签: DELTA 套装 蚀刻 玻璃 有害气体 肥皂水
  • 简介:ThefeminizationofmigrationinthePearlRiverDeltaDAIFanGuangzhouEnglishLanguageCenter,ZhongzhanUniversity,Guangzhou510275Abstra...

  • 标签: FEMINIZATION MIGRATION PEARL RIVER DELTA China
  • 简介:ThispaperdealswiththedevelopmentandevolutionofmodemYellowRiverdeltaandtheerosionordepositionratesofitsdifferentsections.InJune,1996,YellowRiversterminalcoursewasartificiallyturnedeastwardstoemptyintotheseaandthenthe11thlobeofthemodernYellowRiverdeltabegantoform.Thiscoursechangemaymarkthebeginningofthe3rdsubdeltaformation.Asaresultofthat,theYellowRiverdeltaadvancestowardseastbynorthwiththe1st,2ndand3rdsubdeltasarrangedinsuccession.Coastzoneinthedeltaicareaisdividedinto7differentsectionsaccordingtotheirdifferenterosionordepositionrates:therelativelystablesectionfromDakouRivertoShunjiangStream,theweaklyretreatingsectionfromShunjiangStreamtotheTiaoheRivermouth,thestronglyretreatingsectionfromtheTiaoheRivermouthtothestation106,theartificiallystablesectionduetostonedamprotectionfromthestation106toGudongOilfield,thestrongdepositionsectionfromGudongOilfieldtoDawenliuHaipu,theweaklydepositionsectionfromDawenliuHaiputotheZimaiStreammouth,andthestablesectionfromtheZimaiStreammouthtotheJiaolaiRivermouth.Itispredictedthattheerosionanddepositionsituationsofthesectionswillnearlyremainthesamein10years,buttheretreatingandsilting-uprateswilltendtobecomeslowergradually.Humanactivitieshaveanevidentinfluenceonthechangesofthecoastline.

  • 标签: 黄河三角洲 海岸演化 海岸线 沉淀物
  • 简介:Fossildiatomgroupsfrom85samplesofdrillholesand13samplesoftheknowndepositionalenvironmentareanalysed.TheboundaryoftheZhujiangDeltaisdiscussedfromthedistributionoffossildiatom.ThehorizonalvariationofHolocenesedimentaryfaciescanbedividedintofourkindsofdepositionalenvironmentcorrespondingtothedeltaplainsubfaciesandthedeltafrontsubfacies.TheverticalvariationofHolocenedepositionalfaciesshowstwicechangesoftransgressionfromweaktovigorous.

  • 标签: DEPOSITIONAL FACIES delta sedimentary HOLOCENE STRATUM
  • 简介:Thepotentialforharvestingenergyfromaflexibledeltawingusingapiezoelectricbimorphisexperimentallyinvestigated.Differentconfigurationsoftheproposedharvestingsystemweretestedinawindtunneloverabroadrangeofairspeeds.Inadditiontoevaluatingthelevelofharvestedpower,ananalysisisperformedtoextractcriticalaspectsfortherelationbetweenspeed,flexibility,geometryandthepotentialpowerthatcanbeharvestedfromaclamped,cantileveredflexibledeltawingatlowanglesofattackandlowspeeds.Thisanalysisprovidesaninsightintoparametersthatimpactenergyharvestingfromflexiblemembranesorelements.

  • 标签: Energy HARVESTING DELTA WING PIEZOELECTRIC BENDING
  • 简介:本刊讯4月8日,万利(中国)有限公司旗下"TOP陶瓷"品牌与中国陶瓷总部正式签约,宣布进驻中国陶瓷总部西区G01。TOP陶瓷相关负责人苏进益、营销总经理李平凡、执行董事龙强、中国陶瓷总部营运总经理汤洁明以及各界媒体代表出席了签约仪式。尽管2015年行情并不理想,但据TOP陶瓷相关负责人苏进益透露,2015年TOP还是实现了50%的增长。TOP是如何做

  • 标签: 中国陶瓷 TOP
  • 简介:Throughoneandhalfyearcontinuousin-situmeasurements,thedistributionsandvariationsofsurfaceozoneanditsprecursorsatatypicalmixedagriculturalandmetropolitanarea-Changshu,YangtzeDeltaregion,werestudied.Thepreliminaryanalysisontheconcentrationlevelsandvariationsofsurfaceozoneindicatedtheobviousseasonalanddiurnalcyclesduringtheexperiment.Thehourlyaveragedconcentrationsofsurfaceozonewerehigh,inabout17%oftotalvalidhoursthesurfaceozoneconcentrationexceeded50ppb,andin22daysthehourlyaveragedozoneconcentrationwasgreaterthan100ppb.Therewereabout40%ofthedaysinthatthedailymaximum8-hourozoneconcentrationwasgreaterthan50ppb.Thedayswithdailymaximum8-hourozoneconcentrationgreaterthan80ppbwereabout33daysthataccountedforabout8%oftheobservationaldays.Thevariationsof5-daymovingaveragedozoneconcentrationsdependedbothontheweatherconditionsandonthechangesofozoneinbackgroundatmosphere.Photochemicalprocesshadthesignificantimpactsonozoneproductions.

  • 标签: TYPICAL mixed agricultural and METROPOLITAN area
  • 简介:长江三角洲(UA-YRD)上的城市的凝块在水,土地,生态的环境,地点和交通的方面有一些优点。依靠资源环境库和另外的优点,UA-YRD完成了大开发。基于索引系统和全面评估的模型,自从1978,纸计算UA-YRD的发展水平。从1978~2007,开发水平以0.0333的年度率逐年增加了的结果表演,和开发的进程能被划分成三个阶段,即低速度的开发舞台(19781991),快速的开发舞台(19912000),并且高速度的开发舞台(20002007)。速度分别地是0.0083,0.0356和0.0766。在30年的发展期间,外国经济活动在开发有最大的效果,由交通,工业经济活动和电信列在后面(有序)。另外,不同驱动力在不同阶段有不同效果。纸建议更多的注意应该对高速度的发展阶段和重要驱动力被给予驾驶它的发展。同时,资源和环境的限制不应该被忽视,长有效的机制需要被证实在UA发展,资源利用和环境保护之中支撑和谐开发。一些比较研究应该着急地被执行有效地支持并且支持UA的持续开发,特别向进化,驱动力和braking力量。

  • 标签: 长江三角洲 城市群 优势 综合评价指标体系 生态环境 资源环境
  • 简介:Thepoleassignmentinaspecifieddiskbystatefeedbackforuncertaindelta-operatorsystemsisstudied.BymakinguseofalgebraRiccatiequations,asufficientandnecessaryconditionofpoleassignmentforakindofparameteruncertaindelta-operatorsysteminaspecifieddiskbystatefeedbackispresented.Andthedesignmethodofstatefeedbackcontrollerisalsodeveloped.Theproposedmethodcanunifysomepreviousrelatedresultsofcontinuousanddiscretetimesystemsintothedeltaframework.Theefficiencyofthedesignmethodisillustratedbyanumericalexample.

  • 标签: 三角算子 区域分配 不定性 稳健性 状态反馈
  • 简介:为了在Selenga河三角洲并且到监视器的生态系统估计今日的污染层次,变化由家庭的分泌物引起了拒绝并且工业废物,以及工作农业并且股票农场在里面

  • 标签: 色楞格河 三角洲 重金属 季节 空间分布
  • 简介:ONENVIRONMENTALCONDITIONSOFTHEGENESISOFTORNADOINTHEZHUJIANGRIVERDELTAINSPRING¥WangPeilin王沛霖(DepartmentofAtmosphericSciences,Z...

  • 标签: Zhujiang RIVER DELTA SPRING TORNADO ENVIRONMENTAL