简介：Therehasbeenaparadigmshiftinmedicineawayfromtradition,anecdoteandtheoreticalreasoningfromthebasicsciencestowardsevidence-basedmedicine(EBM).Inpalliativecarehowever,statisticallysignificantbenefitsmaybemarginalandmaynotberelatedtoclinicalmeaningfulness.Thetypicaltreatmentvs.placebocomparisonnecessitatedby‘goldstandard'randomisedcontrolledtrials(RCTs)isnotnecessarilyapplicable.Thecomplexmultimorbidityofendoflifecareinvolvesconsiderationsofthepatient'sphysical,psychological,socialandspiritualneeds.Inaddition,thefieldofpalliativecarecoversaheterogeneousgroupofchronicandincurablediseasesnolongerlimitedtocancer.Adequatesamplesizescanbedifficulttoachieve,reducingthepowerofstudiesandhighattritionratescanresultininadequatefollowupperiods.Thisreviewusesexamplesofthemanagementofcancer-relatedfatigueanddeathrattle(noisybreathing)todemonstratethecurrentstateofEBMinpalliativecare.ThefutureofEBMinpalliativecareneedstobeasdiverseasthepatientswhoultimatelyderivebenefit.Non-RCTmethodologiesofequivalentquality,validityandsizeconductedbycollaborativeresearchnetworksusinga‘mixedmethodsapproach'arelikelytoposethecorrectclinicalquestionsandderiveevidencebasedyetclinicallyrelevantoutcomes.

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简介：Inthispaper,firstlywedemonstratetheuseofnodaladmittancematrixtoconvertalow-passband-passfilterbasedonoperationalamplifier(op-amp)toacircuitbasedonasecond-generationcurrentconveyor(CCII).Thistechniqueallowsustogeteightpresumptionsoffiltercircuits.Secondly,wepresentanovelarchitecturecircuitofCCII,whichcanoperateatlowsupplyvoltageof±0.75V.AllsimulationsareperformedbyTSPICEmodels.ThesimulationresultsshowthatthiscircuithasalowimpedanceatterminalX(RX=1.01Ω),averyhighinputimpedanceatterminalY,andwidebandwidthcurrentandvoltage.Thecenterfrequencyoftheproposedfilterisvariableontheinterval[157kHz,196MHz].

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简介：Thispaperextendstheresourcedragstudiesbyempiricallyinvestigatinghowspatialfactorsaffecttheregionaleconomicgrowth.Usingspatialpaneleconometricmodels,thispaperestimatesthedraggingeffectofenergyresourcesoftheYangtzeRiverDeltametropolitanareas.WefindthatthegrowthdragofenergyintheYangtzeRiverDeltaisabout6%onaverage,whichmeansthatenergyconstraintsdecreasetheeconomicgrowthby6%annually,higherthanthenationallevelthathasbeenpreviouslymeasuredintheliterature.Thisresulthastakenintoaccounttheimpactofneighboringcities’economicdevelopment,soastoobtainamoreaccurateestimate.Basedonthesemeasurementresults,weproposesomepolicyrecommendations.

简介：TheunsteadycavitationevolutionaroundtheClark-Yhydrofoilisinvestigatedinthispaper,byusinganimprovedfilter-basemodel(FBM)withthedensitycorrectionmethod(DCM).Toimprovethepredictionaccuracy,thefilterscaleisadjustedbasedonthegridsize.Thenumericalresultsshowthatasmallfilterscaleiscrucialfortheunsteadysimulationsofthecavitysheddingflow.ThehybridmethodthatcombinestheFBMandtheDCMcouldhelptolimittheoverpredictionoftheturbulentviscosityinthecavitationregiononthewallofthehydrofoilandinthewake.Thelargevalueofthemaximumdensityratio?l/?v,clippromotesthemasstransferratebetweentheliquidphaseandthevaporphase,whichresultsinalargesheetcavitylengthandthevaporfractionriseinsidethecavity.Thecavitypatternspredictedbytheimprovedmethodareverifiedbytheexperimentalvisualizations.Thetime-averagelift,thedragcoefficientandtheprimaryoscillatingfrequencyStforthecavitationnumber?=0.8,theangleofattack,?=8o,ataReynoldsnumberRe=7?105are0.735,0.115and0.183,respectively,andthepredictederrorsare3.29%,3.36%and8.93%.Thetypicalthreestagesinonerevolutionarewell-captured,includingtheinitiationofthesheet/attachedcavity,thegrowthtowardthetrailingedge(TE)withthedevelopmentofthere-entrantjetflow,andthelargescalecloudcavityshedding.ItisobservedthatthecloudcavitysheddingflowinducesthevortexpairsoftheTEvorticesinthewakeandthesheddingvortices.Thepositivevorticityvortexofthere-entrantjetandtheTEvorticesinteractsandmergeswiththenegativevorticityvortexoftheleadingedge(LE)cavitytoproducethesheddingflow.

简介：Thereisgrowinginterestinthecorrelationbetweenworkingtimeandenvironmentalpressures,butpriorempiricalstudiesmostlyfocusedonstaticmethodologies.Thisarticleuseddynamicpanelregressionapproachestoexamineandcomparetherelationshipamongwestern,southern,andnorthernEuropeancountriesovertheperiod1970-2010,andprovedtheexistenceofstronglysignificantrelationshipsinallmodels.Furthermore,thisarticledetectedtherelationshipbetweenworkinghoursandenvironmentalindicators(carbonemissionandenergyuse)atdifferentphases.Wecontributetoafurtherunderstandingoftheenvironmentaleffectsoftheworkingtimereductionpolicybycomparingthedifferencesamongvariousperiodsandcountrygroupsinasystemgeneralizedmethodofmoments(GMM)dynamicframework.

简介：ETL(Extract-Transform-Load)通常包括三个阶段：抽取，转变，并且装载。在造数据仓库里，它起数据注射的作用并且是最费时间的活动。因此改进ETL的表演是必要的。在这份报纸，一条新ETL途径，电话(Transform-Extract-Load)被建议。电话途径使用虚拟表格在抽取舞台和装载舞台前认识到转变阶段，在存储从每迥异的来源数据系统提取的未加工的数据的数据阶段区域或阶段数据库外面。电话途径减少数据传播负担，并且从存取层改进询问的性能。试验性的结果基于我们的建议基准证明电话途径可行、实际。

简介：基于颤动的精力harvester是实质上在一个有限频率范围工作的一个共鸣器。增加工作频率范围是一个挑战性的问题。这份报纸为提高经由内部回声收获的精力揭示新奇可能性。内部回声精力harvester被建议。刺激连续地作为Gaussian白噪音，一个秒顺序过滤器定义的有颜色的噪音，狭窄乐队的噪音，和指数地相关的噪音被假定。相应平均root-mean-square产量电压被计算。数字结果证明内部回声增加操作带宽和产量电压。

简介：Ghostimagingcouldbeusedtomakeaquickidentificationoforthogonalobjectsbymeansofphotocurrentcorrelationmeasurements.Inthispaper,weextendthemethodtoidentifynonorthogonalobjects.Inthemethod,anobjectisilluminatedbyonephotonfromanentangledpair,andtheotheroneisdiffractedintoaparticulardirectionbyapre-establishedmultiple-exposurehologramintheidlerarm.Bythecorrelationmeasurements,thenonorthogonalobjectinthesignalarmcouldbediscriminatedwithinaveryshorttime.Theconstraintsfortheidentificationofnonorthogonalobjectsarepresented,whichshowthatthenonorthogonalobjectscanbediscriminatedwhentheoverlappingportionbetweenanytwoobjectsislessthanhalfofalltheobjectsintheset.Thenumericalsimulationsfurtherverifytheresult.

简介：Theinstabilityofboreholewallisalwaysadifficultquestionindrillingboreholeprogress.Itincreasesthecostofproductionandprolongsproductioncycle.Soithasasignificantresearchvalue.Consideringtheeffectofmudpressureandporepressureonthestabilityofboreholewall,thispaperestablishesamathmodelbyapplyingthetwo-dimensionalbondtheoryofBiot.Itappliesthemethodofthenumericalsimulationtoanalyzetheeffectofmudpressureandporepressureonthestabilityofboreholewall.Thesimulationresultsshowthatthemudpressureimposesgreatinfluenceonstressfieldandonthedeformationofboreholesoil,whichprovidesatheoreticalbasisduringthedrillingprocesstoavoidtheinstabilityoftheboreholeandtostudyhowtoselectreasonablemudandmudpressure.

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简介：Duringrecentyears,somenotionsabouttaskshavebeenconsideredasthemajorpartofanalysisindifferentteachingapproachesandteachersarebeingmoreinterestedintheuseoftaskbasedapproachbothinforeignandinsecondlanguageteaching.Themaingoalofthisarticleistointroduceanddiscusssomemajorprinciplesoftask-basedlanguageteachingandindicateshowteacherscanapplythemintheircurriculum.

简介：Traumaticinjuriestospinalcordelicitdiversesignalingpathwaysleadingtounselectiveandcomplexpathologicaloutcomes:deathofmultipleclassesofneuralcells,formationofcysticcavitiesandglialscars,disruptionofaxonalconnections,anddemyelinationofsparedaxons,allofwhichcancontributemoreorlesstodebilitatingfunctionalimpairmentsfoundinpatientswithspinal

简介：LanthanidedopedNaYF4microcrystalsweresynthesizedviaafacilehydrothermalmethod.MulticolorupconversionluminescencewasobservedinNaYF4microcrystalsdopedwithYb3+/Er3+,Yb3+/Tm3+,andYb3+/Er3+/Tm3+undertheexcitationof980nminfraredlight.Importantly,theexcitationpowerdensitydependenceofupconversionemissionintensityindicatedclearlytheenergytransferfromTm3+toEr3+ionsundertheexcitationoflowpowerdensity(5×102–9×102W/cm2).Meanwhile,theinverseenergytransferfromEr3+toTm3+ionsundertheexcitationofrelativelyhigherpowerdensity(4.1×104–4.9×104W/cm2)wasalsorevealed.ThiswasadirectevidenceforreversibleenergytransferbetweenEr3+andTm3+ions.Undertheexcitationofhighpowerdensity(4.1×104–4.9×104W/cm2),darksensitizerswerealsomotivatedsothatthebottleneckeffectofhighconcentrationYb3+iondopingwasbroken.ThiswasthemainreasonforrealizinghighupconversionefficiencyofthesampleswithheavydopingofYb3+ion.

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简介：第四代(4G)无线通讯系统被部署了或不久在许多国家被部署。与无线移动设备和服务的爆炸，然而，仍然有一些挑战，不能甚至被4G提供，例如光谱危机和内部房间的干扰。电信操作符转弯了承诺自己分享可得到的资源，包括硬件和软件资源。因此与相互的基础结构，‘integration’应该被加亮，特别在第五代(5G)被期望到的无线系统超过2020被部署。在文章的作者建议了潜在的细胞的体系结构，并且讨论了内部操作员的收音机接口为5G的基于的同步(肋骨)无线通讯系统。内部操作员的肋骨和典型情形的一个计划，与相应干扰的分析一起被给。分享的参数，内部操作员的肋骨的发信号的协作和为肋骨的信号(RS)设计也是的听的引用的分析执行了。