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简介:摘要目的编制基于新D&M模型的《临床护理信息系统有效性评价量表》并验证其信效度。方法以新D&M模型为框架,通过阅读相关文献及著作、课题组讨论等确定新D&M模型6大维度的具体条目,形成初始量表;以德尔菲法多轮专家函询对初始版量表各维度及具体条目进行筛选确定,形成测试版量表;使用区分度分析法、相关系数分析法、Cronbach α系数法对测试版量表的维度与条目进行修改,采用探索性因素分析法对量表的结构效度进行分析,对测试量表维度与条目进行优化;采用内部一致性与重测信度法对量表的信度进行分析。结果探索性因素分析共提取5个共同因素,解释总变异量57.462%;最终版量表由5个维度、23个条目构成,量表总Cronbach α系数为0.768,重测信度总相关系数为0.849。结论该量表保留的5个维度建构效度良好,能够有效解释受试者的心理特质,且量表所测得结果具有良好的稳定性与一致性,可用于评价护理信息系统的有效性。
简介:摘要:本文以再现系统为例,从部件原理,到系统功能设计,深入浅出的阐述功能设计到实现的过程。让从业者更了解系统。
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].
简介:AbstractTrauma during pregnancy deserves special attention because of its management objectives, i.e. wellbeing of both pregnant woman and foetus. Maxillofacial trauma directly affects the nutrition of foetus by interfering with the normal functions in a pregnant woman such as mouth opening, mastication and breathing. Hence early restitution of form and function of maxillofacial skeleton is essential. However, the gravid status is associated with numerous anatomical and physiological changes which present with clinical dilemma related to imaging and treatment. A careful scrutiny of the patient's systemic and gestational status is absolutely essential before, during and after instituting any interventional procedures. We present a case of bilateral condyle fracture in a 30-year-old pregnant woman in the third trimester (32 weeks). She was treated with inter maxillary fixation using orthodontic brackets & elastics. After successful restitution of occlusion, the patient was advised aggressive physiotherapy which ensured normal mouth opening. Two weeks later, the patient delivered uneventfully. The patient was followed up at one month and 3 month and demonstrated restitution of normal occlusion, mouth opening and lower facial height. This article aims at analyzing the contemporary principles in management of maxillofacial trauma in a pregnant woman and clarifying the common misconceptions.
简介:1.IntroductionRecently,singleserverqueueswithvacationshavebeenstudiedextensivelyfromtheirowntheoreticalinterestaswellastheirapplicationstomanyengineeringsystemssuchascomputers,communicationnetworksandmanufacturingsystems.FOrtheM/G/lqueueingsystemswit...