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简介:摘要目的探讨无晶体眼人工晶体Ⅱ期植入术围术期的护理。方法本次研究的97例无晶体眼患者均为医院在2014年5月到2015年7月期间收治,将其按照护理内容的不同分为观察组49例和对照组48例,观察组患者实施综合护理干预,对照组进行常规护理。结果观察组并发症发生率为4.08%,其护理满意度为93.88%;对照组并发症发生率为22.92%,其护理满意度为77.08%。两组比较差异均有统计学意义。结论无晶体眼患者在人工晶体Ⅱ期植入术围术期期间行综合护理干预的临床效果确切,患者护理满意度高,且并发症发生率较低,值得在临床上推广。
简介:Intrinsiccarrierconcentration(ni)isoneofthemostimportantphysicalparametersforunderstandingthephysicsofstrainedSiandSi1-xGexmaterialsaswellasforevaluatingtheelectricalpropertiesofSi-basedstraineddevices.Uptonow,thereportonquantitativeresultsofintrinsiccarrierconcentrationinstrainedSiandSi1-xGexmaterialshasbeenstilllacking.Inthispaper,byanalyzingthebandstructureofstrainedSiandSi1-xGexmaterials,boththeeffectivedensitiesofthestatenearthetopofvalencebandandthebottomofconductionband(NcandNv)at218,330and393KandtheintrinsiccarrierconcentrationrelatedtoGefraction(x)at300KweresystematicallystudiedwithintheframeworkofKPtheoryandsemiconductorphysics.ItisfoundthattheintrinsiccarrierconcentrationinstrainedSi(001)andSi1-xGex(001)and(101)materialsat300KincreasessignificantlywithincreasingGefraction(x),whichprovidesvaluablereferencestounderstandtheSibasedstraineddevicephysicsanddesign.
简介:Moleculardynamics(MD)simulationswereperformedtostretchtherectangulargraphenesheetsdopedwithsilicon,nitrogenorboronatoms.Young’smodulus,ultimatestress(strain)andenergyabsorptionweremeasuredforthegraphenesheetswiththedopingconcentration(DC)rangingfrom0to5%.Theemphasiswasplacedonthedistincteffectsofeachindividualdopantonthefundamentalmechanicalpropertiesofgraphene.TheresultsindicatedthatincorporatingthedopantsintographeneledtoanalmostlineardecreaseinYoung’smodulus.Monotonicreductionsinultimatestrength,ultimatestrainandenergyabsorptionwerealsoobserved.Suchdopingeffectswerefoundtobemostsignificantforsilicon,lesspronouncedforboron,andsmallornegligiblefornitrogen.Theoutputsprovideanimportantguidanceforthedevelopmentandoptimizationofnovelnanoscaledevices,andfacilitatethedevelopmentofgraphene-basedM/NEMS.
简介:摘要目的探讨并总结虹膜夹持型人工晶体(irisclipintraocularlensIOL)植入联合虹膜周切术治疗无晶体眼的临床疗效。方法对15例15眼无后囊或少后囊存在的无晶体眼进行虹膜夹持型人工晶体植入联合虹膜周切术。术后1天、1周、1月、3月随访,观察术前术后裸眼视力(visualacuity,VA)、最佳矫正视力(bestcorrectedvisualacuity,BCVA)、角膜透明性、眼压(intraocularpressure,IOP)、角膜内皮细胞计数(cornealendothelialcells,CECs)及术后并发症情况。结果术后3月,术后VA较术前显著提高;术前、术后BCVA无显著变化;术后3月角膜均恢复透明(除一眼术前即已因外伤继发角膜瘢翳而混浊),术后3月IOP平稳正常,CECs较术前无或仅有少量减少,无一例出现人工晶状体移位、继发性青光眼、脉络膜脱离、出血、炎症渗出等并发症。结论虹膜夹持型人工晶体植入联合虹膜周切术治疗无晶体眼,具有屈光矫正效果好、稳定性高、并发症少、操作相对简单、组织损伤小等优点,疗效理想,值得推广。
简介:SiC/Si<潜水艇class=“a-plus-plus”>3N<潜水艇class=“a-plus-plus”>4合成是用自我繁殖的高温度的燃烧合成-Si3N<潜水艇class=“a-plus-plus”>4粉末和适当数量原文如此搽粉。两个都,sintering添加剂,系统被使用,它是YAN(Y2O3艾尔2O3AlN)并且YN(Y2O3AlN)。影响在SiC/Si的sintering行为上原文如此满意<潜水艇class=“a-plus-plus”>3N<潜水艇class=“a-plus-plus”>4合成被调查。结果证明有二个sintering添加剂系统的样品的密度,收缩,弯曲力量,坚硬,和破裂坚韧随内容的增加增加第一原文如此然后甚至当原文如此内容不断地增加时,减少。样品的重量损失的趋势是相反的。有最好的机械性质的样品原文如此满意在二个系统是不同的。为YAN系统,当原文如此内容到达10时,样品的最好的机械性质被获得?%,当至于YN系统它是5时?%。YN样品的性质比YAN样品优异。J阶段(2Y2O3吠敨爠畯整漠?灡汰楹杮氠睯瀠敲獳牵?景???慐漠?桴?獡搭獩牰灯牯楴湯瑡摥朠敲湥挠浯慰瑣搠牵湩?桴?敤潳灲楴湯爠'啼礃A慮楴湯瀠潲散獳椠?楳畴栠瑯搠晥牯慭楴湯椠??灳牡?汰獡慭猠湩整楲杮?偓?猠獹整?慣?扯慴湩挠浯汰瑥汥?敲潣扭湩摥丠??洠条敮?楷桴朠潯?湡獩瑯潲祰愠摮洠条敮楴?牰灯牥楴獥?桔?慭楸畭?慭湧瑥捩瀠潲数瑲敩??????汣獡?愢瀭畬?汰獵?慭?猯'T?????鮪徬鞪??极脿???醰鑛??鴿鎘銳????�
简介:Thisstudyaimstoinvestigatetheeffectofthe1-stepquenchingandpartitioning(Q&P)processonthemicrostructureandtheresultingVicker’shardnessof0.3C-1.5Si-1.5Mnsteelbyusingin-situdilatometry,opticalmicroscopy(OM),scanningelectronmicroscopy(SEM),X-raydiffractometry(XRD),andVicker’shardnessmeasurement.Systematicanalysesindicatethatthemicrostructureofthespecimensquenchedandpartitionedat150℃,200℃,250℃,and300℃mainlycompriseslathmartensiteandretainedaustenite.Thedilatometrycurveofthespecimenpartitionedat150℃ispresumablyascribedtotheformationofisothermalmartensite.Intheearlystagesofpartitioningat200℃,thenearlyunchangeddilatationcurveiscloselyrelatedtothesynergisticeffectofisothermalmartensiteformationandtransitionalepsiloncarbideprecipitation.Inthelaterstagesofpartitioningat200℃,theslightincreaseinthedilatationcurveisduetothecontinuousisothermalmartensiteformation.Withfurtherincreaseinpartitioningtemperatureto250℃,thedilatationincreasesgraduallyupto3600s,whichisrelatedtocarbonpartitioningandlowerbainiteformation.Partitioningatahighertemperatureof300℃causesarapidincreaseinthedilatationcurveduringtheinitialstages,whichsubsequentlylevelsoffuponprolongingthepartitioningtime.Thisismainlyattributedtotherapiddiffusionofcarbonfromathermalmartensitetoretainedausteniteandcontinuousformationoflowerbainite.
简介:通过EMS(Ethylmethylsulfonate,甲基磺酸乙酯)诱变豫谷1号获得一个遗传稳定的谷子小穗突变体si-sp1,该突变体突出表现为穗部变小,同时伴随有株高降低、单码小花数减少和根系变小等表现型变异。与野生型豫谷1号相比,突变体的穗长和株高分别降低了37.8%和9.0%,单穗粒重和单码小花数分别降低了40.3%和31.7%,但千粒重增加了20.2%。遗传分析表明,si-sp1突变性状由1对隐性基因控制。以si-sp1为母本、辽谷1号为父本构建的F2定位群体的隐性单株,将突变基因定位在8号染色体上CAAS8003与SSR1038间约11.02M的距离内,为下一步精细定位并分离该基因奠定了基础。
简介:在同一直线上的双脉搏的导致激光的故障光谱学被使用一双毫微秒Nd在Si水晶上执行:在1064nm射出的钇铝柘榴石激光来源。光谱紧张和选择Si原子、离子的线的signalto-噪音比率被用来评估光排放。当改变interpulse延期时间和二的精力比率时,光排放紧张被记录搏动的激光。线紧张和signal-to-noise比率上的数据获得延期时间的效果也被调查了。基于结果,最佳的interpulse延期时间,二的精力比率搏动了激光,和完成原子、离子的最大值的数据获得延期时间衬里紧张被作出对有利的裁决有在同一直线上的双脉搏的激光途径的Si血浆的产生。为观察的线紧张变化的主导的机制也被讨论。另外,在不同的门的血浆温度和电子数字密度推迟时间和不同interpulse延期时间被导出。血浆在更短的interpulse延期时间在电子温度和电子数字密度上防护的重要影响被观察。
简介:Theproblemofair-fuelratio(AFR)controloftheportinjectionsparkignition(SI)engineisstillofconsiderableimportancebecauseofstringentdemandsonemissioncontrol.Inthispaper,thestaticAFRcalculationmodelbasedonin-cylinderpressuredataandontheadaptiveAFRcontrolstrategyispresented.Themodelutilisestheintakemanifoldpressure,enginespeed,totalheatrelease,andtherapidburnangle,asinputvariablesfortheAFRcomputation.Thecombustionparameters,totalheatrelease,andrapidburnangle,arecalculatedfromin-cylinderpressuredata.ThisproposedAFRmodelcanbeappliedtothevirtuallambdasensorforthefeedbackcontrolsystem.Inpracticalapplications,simpleadaptivecontrol(SAC)isappliedinconjunctionwiththeAFRmodelforport-injectedfuelcontrol.TheexperimentalresultsshowthattheproposedmodelcanestimatetheAFR,andtheaccuracyoftheestimatedvalueisapplicabletothefeedbackcontrolsystem.Additionally,theadaptivecontrollerwiththeAFRmodelcanbeappliedtoregulatetheAFRoftheportinjectionSIengine.
简介:摘要目的评价白内障超声乳化人工晶体植入手术护理效果,总结护理要点。方法对180例超声乳化人工晶体植入术治疗白内障患者,给予精心的围术期护理,主要包括术前心理护理、术前准备,术中巡视、体征监测,术后心理护理、眼部护理、饮食管理、基础护理。结果手术均获成功,视力1.0以上18眼、视力0.5~1.0者175眼、视力<0.5者8眼,所有患者视力较术前均明显改善;术后发生角膜轻度水肿8例、虹膜轻度免疫反应5眼,随访3~18个月,无远期并发症,患者生活能力、生活质量显著提高。结论白内障超声乳化人工晶体植入疗效影响因素较多,围术期护理需要具有整体性、系统性,关注心理、生理等各个层面,注重健康教育,保障住院期间、出院后护理质量。