简介：豪华品牌长轴距的中型车自从奥迪A4L率先发力,将中国这个潜在市场完全唤醒之后,各大豪华品牌纷纷加入到这个阵营中来,我们回顾过往老款的C级以及320i,你会发现它甚至不比现如今的紧凑级车大多少.但各自在经历了加长、加宽、加大的蜕变后,轴距都达到了惊人的2900毫米以上.这样的改变加上各自品牌多年的沉淀,它们都背负了各自品牌热门车型领跑销量的艰巨使命.

简介：NationalTeleconferenceonFamilyPlanningWorkwasheldinBeijingonFebruary27,2014.LiKeqiang,MemberoftheStandingCommitteeofCPCCentralCommitteePoliticalBureauandPremieroftheStateCouncilmadeimportantinstructions,'Adjustingandimprovingfertilitypolicies

简介：Wi-Fi技术已经越来越普及,不过抱怨无线信号不稳定、上网速度慢、Wi-Fi热点太少的人也越来越多。现在,有一项新技术Li-Fi,可能会让这些问题得到解决。文章介绍了Li-Fi的概念,详细说明Li-Fi的特点及技术优势,并对Li-Fi的应用和未来发展进行讨论。

简介：近年来,国内豪华车市场迎来巨大变局:一方面,由于第二阵营豪华品牌齐齐发力,整体销量获得大幅提升,从而瓜分了一部分第一阵营的市场份额;另一方面,第一阵营奔驰、宝马、奥迪这三大品牌之间内部的竞争局势也发生转变.奥迪由于经销商的问题,今年第一季度的销量锐减.就在奥迪“婆媳”之间内讧的时候,奔驰攻势强劲,在全新E级车的带动下,奔驰在今年上半年度成功超过宝马,成为全球豪华车市场的销量冠军.

简介：摘要目的比较超声造影(CEUS)肝脏影像报告与数据系统(LI-RADS)2017版(v2017)和磁共振成像(MRI) LI-RADS 2018版(v2018)单独以及联合应用对肝细胞癌(HCC)高危患者肝内局灶性病变(FLL)恶性风险的预测价值。方法对2018年1月至2021年10月于上海交通大学医学院附属瑞金医院及瑞金医院无锡分院同时行CEUS和增强MRI检查的212例患者300个FLL的临床和影像学资料进行回顾性分析，入组结节均根据CEUS LI-RADS v2017和CT/MRI LI-RADS v2018分类标准进行分类，对2种影像学LI-RADS分类结果行Cohen′s Kappa检验。以组织病理学诊断或随访结果为金标准，比较2种影像学LI-RADS分类标准单独以及联合应用对FLL的恶性风险预测价值。结果CEUS LI-RADS v2017和MRI LI-RADS v2018两种影像学分类标准间总体一致性中等(Kappa＝0.441)。CEUS LR-5和MRI LR-5单独应用以及联合应用诊断HCC的特异性分别为93.66%、95.07%、88.73%(P>0.05)，阳性预测值分别为93.13%、93.81%、89.81%(P>0.05)。CEUS LR-M和MRI LR-M单独应用以及联合应用诊断非HCC恶性肿瘤的敏感性分别为85.71%、82.86%、100%，联合应用高于MRI LR-M(P＝0.033)，但与CEUS LR-M相当(P＝0.063)。结论CEUS LI-RADS v2017与MRI LI-RADS v2018分类总体一致性中等，CEUS LR-5诊断HCC特异性和阳性预测值与MRI LR-5相似，CEUS LR-M诊断非HCC恶性肿瘤敏感性与MRI LR-M相似，联合应用CEUS和MRI LR-M可提高非HCC恶性肿瘤的诊断敏感性。

简介：Hegu(LI4)andTaichong(LR3)aretheYuan-PrimaryacupointsoftheLargeIntestineandLiverMeridian,andarecollectivelynamedasSiGuan(fourgates)point.Combineduseofthesetwoacupointscanharmonizeyinandyang,regulateqi

简介：ThedosimetricphosphorsLi_3PO_4:M(M=Tb,Cu)wereproducedbymodifiedsolid-statemethod.ThestructuralandmorphologicalcharacterizationwascarriedoutthroughX-raydiffraction(XRD)andscanningelectronmicroscope(SEM).Additionally,thephotoluminescence(PL),thermoluminescence(TL)andopticallystimulatedluminescence(OSL)propertiesofpowderLi_3PO_4dopedwithTbandCuwerestudied.ItisadvocatedthatLi_3PO_4:CuphosphornotonlyshowshigherOSLsensitivity(25timesormore)butalsogivesfasterdecayinOSLsignalsthanthatofLi_3PO_4:Tb~(3+)phosphor.Theminimumdetectabledose(MDD)ofLi_3PO_4:M(M=Tb,Cu)phosphorsisfoundtobe21.69×10~(-3)and3.33×10~(-6)J·kg~(-1),respectively.InOSLmode,phosphorshowslineardoseresponseintherangeof0.02-20.00J·kg~(-1).InTLmode,sensitivityofLi_3PO_4:CuphosphorismorethanthatofLi_3PO_4:Tbphosphor.Thekineticsparameterssuchasactivationenergyandfrequencyfactorsweredeterminedbypeakshapemethod,andphotoionizationcrosssectionsofpreparedphosphorwerecalculated.

简介：摘要文言文教学是中学语文教学的重要内容，传统的教学模式不能适应新课程标准的要求，不能尽可能提高学生的语文素养。所以，要在文言文教学中注入新的活力，让学生喜爱文言文学习。

简介：Inordertodeepentheunderstandingoftherelationshipbetweenfundamentalproperties（including:microstructureandcomposition）andphotocatalyticperformance,fourbismuthatecompounds,including:LiBiO3,NaBiO3,KBiO3,andAgBiO3,areregardedasresearchexamplesinthepresentwork,becausetheyhaveparticularcrystalstructuresandsimilarcompositions.Usingdensityfunctionaltheorycalculations,theirstructural,electronic,andopticalpropertiesareinvestigatedandcomparedsystematically.Firstofall,thecalculatedresultsofcrystalstructuresandopticalpropertiesareinagreementwithavailablepublishedexperimentaldata.Basedonthecalculatedresults,itisfoundthatthetunneledorlayeredmicro-structuralpropertiesleadtothestrongerinteractionbetweenbismuthandoxygen,andtheweakerinteractionbetweenalkaline-earthmetaland[BiO6]octahedron,resultinginthefeatureofmulti-bandgapsinthecasesofLiBiO3,NaBiO3,andKBiO3.ThisconclusionissupportedbythecaseofAgBiO3,inwhichthefeatureofmulti-bandgapsdisappears,duetothestrongerinteractionbetweenthenoblemetaland[BiO6]octahedron.Thesepropertieshavesignificantadvantagesinthephotocatalyticperformance:absorbinglowenergyphotons,rapidlytransferringenergycarriers.Furthermore,thefeaturesofelectronicstructuresofbismuthatecompoundsarewellreflectedbytheabsorptionspectra,whichcouldbeconfirmedbyexperimentalmeasurementsinpractice.Combinedwiththecalculatedresults,itcouldbeconsideredthatthecrystalstructuresandcompositionsofthephotocatalystdeterminetheelectronicstructuresandopticalproperties,andsubsequentlydeterminethecorrespondingphotocatalyticperformance.Thus,anovelBi-basedphotocatalystdrivenbyvisible-lightcouldbedesignedbyutilizingspecificcompositionstoformfavorableelectronicstructuresorspecificmicro-structurestoformabeneficialchannelforenergycarriers.

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简介：将Hartree近似方法应用于类氯离子的试探波函数，对Li^＋的非相对论基态能量进行计算并于实验值相比，误差仅为0．8％，得到较为满意的结果．此方法为原子物理中相关能的计算提供了可靠的理论模型。

简介：Epigastricpain,alsoknownasstomachpain,ispresentedwithfrequentlyrecurrentpainintheupperabdomenorstomacharea,whichismainlycausedbyexogenouspathogen,improperdietorinternalinjuriesduetosevenemotions.All45caseswithepigastricpaincausedbyvariousfactorsweretreatedwithmainlyneedlingHegu(LI4)betweenNovember2010andNovember2012,andthereportisgivenasfollows.

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简介：一辆车需要拥有当下最新的技术以及流线造型、拥有绝对的空间和舒适性、动力性能要在起步时得以完美展现、保证车体每个细节处理精致……这要求苛刻吗？如果觉得要求太多难以满足，那么看看BMW535Li行政型是怎样实现你全部愿望的。

简介：Thenucleationoforderedphasewassimulatedbasedonmicroscopicdiffusionequationandtheassumptionsoftheclassicalnucleationtheorywereexamined.Thequantitativecalculationsofinterfacethicknessevolutionwereaccomplishedforthefirsttime.Itwasfoundthattheinterfacesbetweenorderedphaseanddisorderedmatrixwerediffuse.Theinterfacethicknessdecreasedwithtime,fromtheinitial1.2nmtoanequilibriumvalue0.6nm.Theratiosoftheradiusoforderedparticlesandtheinterfacethicknessmonotonouslyincreased,buttheywereofthesameorderofmagnitudeallthetime.Thesharpinterfaceassumptionshouldnotbeadoptedinthisstage.FortheAl-10%Li(atomfraction)alloyagedat192℃,theassumptionsoftheclassicalnucleationtheorydisagreedwiththefacts.Thephasetransformationfollowedthenon-classicalnucleationmechanismandtheapplicablescopeoftheclassicalnucleationshouldbeconfined.

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简介：故障现象：一辆2007款宝马525Li，配置N52发动机，底盘号为：LBVNU57027SAXXXXX。客户反映，车辆在行驶中突然出现报警闪光灯一直闪烁，无法通过报警闪光灯开关关闭。有时通过拨动转向灯开关可以暂时关闭，但行驶一殴路程后故障又出现。仪表板提示红色检查车辆的符号，

简介：(January1998-December2013)Currentdevelopmentsinsedimentresearchcontinueataheadypace,andarereportedintheInternationalJournalofSedimentResearch(IJSR)atabout500pagesperyear.However,asofJanuary2014,amajorchangehasoccurred:after16years(January1998toDecember2013)asEditor-in-Chief,ProfessorZhao-YinWanghassteppeddownfromthehandlingofmanuscripts.

简介：摘要目的分析超声造影(CEUS)肝脏影像报告和数据系统(LI-RADS)2017版和增强CT(CECT)/MRI LI-RADS 2018版对长径≤2 cm肝微小病灶分类的一致性及差异性。方法回顾性收集2018年1月至2019年6月在天津市第三中心医院同时接受CEUS和CECT或钆塞酸二钠增强磁共振成像(EOB-MRI)检查且具有肝细胞癌(hepatocellular carcinoma，HCC)高危风险的145例患者共145个病灶，按照CEUS LI-RADS 2017版和CECT/MRI LI-RADS 2018版分类标准对病灶进行LI-RADS分类。通过Kappa检验评估两种影像学LI-RADS分类的一致性。并对CEUS和CECT/MRI LI-RADS分类不一致的病灶行进一步分析。结果145个病灶长径为(1.65±0.33)cm。CEUS及CECT/MRI分类为LR-3、4、5、M病灶数分别为16、23、90、16个和25、31、87、2个。CEUS分类为LR-5、M共106个(73.1%)，CECT/MRI分类为LR-5、M共89个(61.4%)，差异有统计学意义(P＝0.033)。CEUS及CECT/MRI分类为LR-3、4、5类中HCC的阳性预测值分别为37.5%、52.2%、97.8%和56.0%、64.5%、96.6%。56个病灶CEUS与CECT/MRI LI-RADS分类不一致。CECT/MRI分类LR-3、4类中28个被CEUS上调为LR-4、5类，HCC所占比例为82.1%。CEUS分类LR-3、4类中14个被CECT/MRI分类上调，HCC所占比例为85.7%。结论CECT/MRI及CEUS中LR-5类对HCC均具有较高的阳性预测值，但二者对LI-RADS分类的一致性较差。CEUS分类为LR-5、M病灶数较CECT/MRI显著增多。CECT/MRI分类LR-3、4类中HCC比例高于CEUS。

简介：Carbon-coatedlithiummanganesesilicate(Li2MnSiO4/C)nanoparticlesweresynthesizedbypolyolprocess.X-raydiffraction(XRD)patternsoftheobtainedmaterialsexhibitagoodfitwiththatoftheLi2MnSiO4phase.Fieldemissionscanningelectronmicroscopy(FESEM)imagesoftheobtainedsamplesshowthattheparticlesizeisonlytensofnanometers.Thehighresolutiontransmissionelectronmicroscopy(HRTEM)analysisshowsthattheLi2MnSiO4nanoparticlesaresurroundedbyaverythinfilmofamorphouscarbon.Thecompositepreparedthroughpolyolprocessshowsgoodperformanceascathodematerialsinlithiumcellsatroomtemperature.ThechargecapacityoftheLi2MnSiO4/Csamplesis219mAh/g(about1.3Li+perunitformulaextracted),andthedischargecapacityis132mAh/g(about0.8Li+perunitformulainserted)inthefirstcycleinthevoltagerangeof1.5-4.8V.Agoodcapacitycyclingmaintenanceof81.8%after10cycleswasobtained.