目的分析早期筛查对发育性髋关节发育不良的预防意义及其影响因素。方法以北京积水潭医院2009年1月至2013年12月间收治住院的1 376名发育性髋关节脱位(developmental dysplasia of the hip,DDH)DDH患儿为研究对象,对患儿父母进行不记名...目的分析早期筛查对发育性髋关节发育不良的预防意义及其影响因素。方法以北京积水潭医院2009年1月至2013年12月间收治住院的1 376名发育性髋关节脱位(developmental dysplasia of the hip,DDH)DDH患儿为研究对象,对患儿父母进行不记名问卷调查。根据初次就诊年龄、不同就诊途径对所有受试者进行分组,问卷调查内容包括患儿初次就诊年龄、患儿父母文化程度、家庭中是否有从医人员、患儿年平均医疗费用、患儿骨科疾病患病史、首次就诊的主管医生级别等。结果2009年1月至2013年12月间,2岁以下DDH患儿占当年全部初次就诊患儿总数的比例呈现逐年升高的趋势(P<0.05),而6岁以上DDH患儿占当年全部初次就诊患儿总数的比例呈现逐年降低的趋势(P<0.05)。由当地医生发现并推荐就诊的患儿比例呈不断上升的趋势。Logistic回归分析结果显示,入选的变量包括患儿父亲文化程度、患儿母亲文化程度以及首次就诊的主管医生级别。结论新生儿进行髋关节早期筛查的意识已经得到一定程度的提高,疾病诊疗相关知识逐渐丰富,患儿父母亲文化程度及首次就诊的主管医生级别是DDH患儿接受早期筛查年龄的主要影响因素。展开更多
To predict the Elasto-Plastic Behaviors(EPBs)of aligned inclusions reinforced composites,this paper develops an interpolative Mori-Tanaka/Double-Inclusion(MT-DI)homogenization model with the secant formulation,and giv...To predict the Elasto-Plastic Behaviors(EPBs)of aligned inclusions reinforced composites,this paper develops an interpolative Mori-Tanaka/Double-Inclusion(MT-DI)homogenization model with the secant formulation,and gives the numerical implementation algorithms of the developed MT-DI model with the secant formulation.The Finite Element(FE)homogenization method is implemented to provide the "exact" EPBs of the composites and thus validate the MT-DI model with the secant formulation.The MT-DI model with the 2 nd-order secant formulation is validated to provide the more accurate predictions,while the MT-DI model with the 1 st-order secant formulation always gives the stiffer predictions.The results show that using the macro-stress and macrostrain as the inputs,the MT-DI model with the secant formulation gives the identical predictions.The predictions of the MT-DI model with the secant formulation vary between those of the MT and DI models with the secant formulation.Meanwhile,the MT-DI model with the secant formulation does not predict the accurate EPBs for the phases of the composites.展开更多
文摘目的分析早期筛查对发育性髋关节发育不良的预防意义及其影响因素。方法以北京积水潭医院2009年1月至2013年12月间收治住院的1 376名发育性髋关节脱位(developmental dysplasia of the hip,DDH)DDH患儿为研究对象,对患儿父母进行不记名问卷调查。根据初次就诊年龄、不同就诊途径对所有受试者进行分组,问卷调查内容包括患儿初次就诊年龄、患儿父母文化程度、家庭中是否有从医人员、患儿年平均医疗费用、患儿骨科疾病患病史、首次就诊的主管医生级别等。结果2009年1月至2013年12月间,2岁以下DDH患儿占当年全部初次就诊患儿总数的比例呈现逐年升高的趋势(P<0.05),而6岁以上DDH患儿占当年全部初次就诊患儿总数的比例呈现逐年降低的趋势(P<0.05)。由当地医生发现并推荐就诊的患儿比例呈不断上升的趋势。Logistic回归分析结果显示,入选的变量包括患儿父亲文化程度、患儿母亲文化程度以及首次就诊的主管医生级别。结论新生儿进行髋关节早期筛查的意识已经得到一定程度的提高,疾病诊疗相关知识逐渐丰富,患儿父母亲文化程度及首次就诊的主管医生级别是DDH患儿接受早期筛查年龄的主要影响因素。
基金the financial support from the Natural Science Basic Research Program of Shaanxi(No.2019JQ857)the Doctoral Scientific Research Foundation of Xi’an Polytechnic University(No.BS201863)+1 种基金the China Textile Industry Federation Science and Technology Guidance Project(No.2019002)the Tianyuan Open Fund Project(No.tywl2019-14)。
文摘To predict the Elasto-Plastic Behaviors(EPBs)of aligned inclusions reinforced composites,this paper develops an interpolative Mori-Tanaka/Double-Inclusion(MT-DI)homogenization model with the secant formulation,and gives the numerical implementation algorithms of the developed MT-DI model with the secant formulation.The Finite Element(FE)homogenization method is implemented to provide the "exact" EPBs of the composites and thus validate the MT-DI model with the secant formulation.The MT-DI model with the 2 nd-order secant formulation is validated to provide the more accurate predictions,while the MT-DI model with the 1 st-order secant formulation always gives the stiffer predictions.The results show that using the macro-stress and macrostrain as the inputs,the MT-DI model with the secant formulation gives the identical predictions.The predictions of the MT-DI model with the secant formulation vary between those of the MT and DI models with the secant formulation.Meanwhile,the MT-DI model with the secant formulation does not predict the accurate EPBs for the phases of the composites.
