目的对老年痴呆患者的口腔健康状况进行系统评价。方法计算机检索CNKI、万方数据库、CBM、PubMed、EmBase、Web of Science数据库,收集国内外公开发表的研究老年痴呆患者口腔健康状况的观察性研究文献,检索时间截止至2018年12月。由2名...目的对老年痴呆患者的口腔健康状况进行系统评价。方法计算机检索CNKI、万方数据库、CBM、PubMed、EmBase、Web of Science数据库,收集国内外公开发表的研究老年痴呆患者口腔健康状况的观察性研究文献,检索时间截止至2018年12月。由2名研究者根据纳入与排除标准对相关文献进行筛选、质量评价和数据提取,对同质研究采用Revman5.3软件进行Meta分析。结果最终纳入10个研究,Meta分析结果显示与对照组人群相比,老年痴呆患者龋失补牙数多[MD=3.36,95%CI(0.80,5.92)],而剩余天然牙数少[MD=-3.22,95%CI(-5.59,-0.85)];老年痴呆患者的菌斑指数[MD=0.86,95%CI(0.45,1.28)]、探诊出血阳性百分比[MD=16.60,95%CI(9.81,23.39)]、探诊深度[MD=0.68,95%CI(0.03,1.34)]及附着丧失[MD=1.13,95%CI(0.38,1.88)]均要高于健康对照组,所有参数差异均有统计学意义(P<0.05)。结论老年痴呆患者牙体和牙周健康状况较健康对照人群差,需对这一人群进行特别的口腔护理和治疗。展开更多
Conventional seismic exploration method based on post-stack data usually fails to identify the distribution of fractured and caved carbonate reservoirs in the Tarim Basin,so the rich pre-stack information should be ap...Conventional seismic exploration method based on post-stack data usually fails to identify the distribution of fractured and caved carbonate reservoirs in the Tarim Basin,so the rich pre-stack information should be applied to the prediction of carbonate reservoirs.Amplitude-preserved seismic data processing is the foundation.In this paper,according to the feature of desert seismic data （including weak reflection,fast attenuation of high frequency components,strong coherent noises,low S/N and resolution）,a set of amplitude-preserved processing techniques is applied and a reasonable processing flow is formed to obtain the high quality data.After implementing a set of pre-stack amplitude-preserved processing,we test and define the kernel parameters of amplitude-preserved Kirchhoff PSTM （pre-stack time migration） and subsequent gathers processing,in order to obtain the amplitude-preserved gathers used to the isotropic pre-stack inversion for the identification of caved reservoirs.The AVO characteristics of obtained gathers fit well with the synthetic gathers from logging data,and it proves that the processing above is amplitudepreserved.The azimuthal processing techniques,including azimuth division and binning enlargement,are implemented for amplitude-preserved azimuthal gathers with the uniform fold.They can be used in the anisotropic inversion to detect effective fractures.The processing techniques and flows are applied to the field seismic data,and are proved available for providing the amplitude-preserved gathers for carbonate reservoir prediction in the Tarim Basin.展开更多
文摘目的对老年痴呆患者的口腔健康状况进行系统评价。方法计算机检索CNKI、万方数据库、CBM、PubMed、EmBase、Web of Science数据库,收集国内外公开发表的研究老年痴呆患者口腔健康状况的观察性研究文献,检索时间截止至2018年12月。由2名研究者根据纳入与排除标准对相关文献进行筛选、质量评价和数据提取,对同质研究采用Revman5.3软件进行Meta分析。结果最终纳入10个研究,Meta分析结果显示与对照组人群相比,老年痴呆患者龋失补牙数多[MD=3.36,95%CI(0.80,5.92)],而剩余天然牙数少[MD=-3.22,95%CI(-5.59,-0.85)];老年痴呆患者的菌斑指数[MD=0.86,95%CI(0.45,1.28)]、探诊出血阳性百分比[MD=16.60,95%CI(9.81,23.39)]、探诊深度[MD=0.68,95%CI(0.03,1.34)]及附着丧失[MD=1.13,95%CI(0.38,1.88)]均要高于健康对照组,所有参数差异均有统计学意义(P<0.05)。结论老年痴呆患者牙体和牙周健康状况较健康对照人群差,需对这一人群进行特别的口腔护理和治疗。
基金financially supported by National Basic Research Program of China(No.2011CB201100)
文摘Conventional seismic exploration method based on post-stack data usually fails to identify the distribution of fractured and caved carbonate reservoirs in the Tarim Basin,so the rich pre-stack information should be applied to the prediction of carbonate reservoirs.Amplitude-preserved seismic data processing is the foundation.In this paper,according to the feature of desert seismic data （including weak reflection,fast attenuation of high frequency components,strong coherent noises,low S/N and resolution）,a set of amplitude-preserved processing techniques is applied and a reasonable processing flow is formed to obtain the high quality data.After implementing a set of pre-stack amplitude-preserved processing,we test and define the kernel parameters of amplitude-preserved Kirchhoff PSTM （pre-stack time migration） and subsequent gathers processing,in order to obtain the amplitude-preserved gathers used to the isotropic pre-stack inversion for the identification of caved reservoirs.The AVO characteristics of obtained gathers fit well with the synthetic gathers from logging data,and it proves that the processing above is amplitudepreserved.The azimuthal processing techniques,including azimuth division and binning enlargement,are implemented for amplitude-preserved azimuthal gathers with the uniform fold.They can be used in the anisotropic inversion to detect effective fractures.The processing techniques and flows are applied to the field seismic data,and are proved available for providing the amplitude-preserved gathers for carbonate reservoir prediction in the Tarim Basin.
