目的:了解南京市男男性行为人群(Men who have sex with men,MSM)乙肝相关知识的知晓率和影响因素,为制定相关防控措施提供指导。方法:通过分类滚雪球法和网上发布广告形式招募MSM作为目标人群,开展血清学检测和问卷调查。用χ2检验进...目的:了解南京市男男性行为人群(Men who have sex with men,MSM)乙肝相关知识的知晓率和影响因素,为制定相关防控措施提供指导。方法:通过分类滚雪球法和网上发布广告形式招募MSM作为目标人群,开展血清学检测和问卷调查。用χ2检验进行单因素分析,Logistic回归分析进行多因素分析。结果:共发出500份问卷,回收444份有效问卷,MSM人群HBsAg阳性率为2.9%,HBsAb阳性率为38.1%,乙肝防治知识知晓率为57.0%。Logistic回归分析显示,同性恋取向、大专及以上文化、艾滋病知识知晓、接受同伴教育者乙肝相关知识的知晓率更高。结论:MSM人群乙肝相关知识知晓率不高,应充分利用主流媒体和新媒体,加强MSM人群中乙肝防治知识的科普和宣传,特别是文化程度较低、艾滋病知识缺乏以及未接受过同伴教育的MSM人群。展开更多
目的通过系统的Meta分析,评估中国男男性行为者(MSM)、暗娼和青少年学生群体的毒品使用率。方法本研究检索了2014年1月1日至2023年12月31日间的相关文献,从CNKI、万方、维普、CBM、PubMed、The Cochrane Library、EMBASE和Web of Scienc...目的通过系统的Meta分析,评估中国男男性行为者(MSM)、暗娼和青少年学生群体的毒品使用率。方法本研究检索了2014年1月1日至2023年12月31日间的相关文献,从CNKI、万方、维普、CBM、PubMed、The Cochrane Library、EMBASE和Web of Science数据库中筛选文献,使用统计学软件Stata17.0进行单组率Meta分析。结果最终纳入32项研究,总样本量为68906例。Meta分析结果显示,中国MSM、暗娼和青少年毒品使用率为21.7%(95%CI:19.5%~24.0%)。不同人群、毒品使用类型、抽样方法间存在显著差异。结论MSM群体的毒品使用率显著高于其他群体,且新型毒品的使用率较高。研究结果强调了不同人群及毒品类型的差异,同时需要综合考虑抽样方法对结果的影响。展开更多
The double-beam system is a crucial foundational structure in industry,with extensive application contexts and significant research value.The double-beam system with damping and gyroscopic effects is termed as the dam...The double-beam system is a crucial foundational structure in industry,with extensive application contexts and significant research value.The double-beam system with damping and gyroscopic effects is termed as the damped gyroscopic double-beam system.In such systems,the orthogonality conditions of the undamped double-beam system are no longer applicable,rendering it impossible to decouple them in modal space using the modal superposition method(MSM) to obtain analytical solutions.Based on the complex modal method and state space method,this paper takes the damped pipe-in-pipe(PIP) system as an example to solve this problem.The concepts of the original system and adjoint system are introduced,and the orthogonality conditions of the damped PIP system are given in the state-space.Based on the derived orthogonality conditions,the transient and steady-state response solutions are obtained.In the numerical discussion section,the convergence and accuracy of the solutions are verified.In addition,the dynamic responses of the system under different excitations and initial conditions are studied,and the forward and reverse synchronous vibrations in the PIP system are discussed.Overall,the method presented in this paper provides a convenient way to analyze the dynamics of the damped gyroscopic double-beam system.展开更多
文摘目的:了解南京市男男性行为人群(Men who have sex with men,MSM)乙肝相关知识的知晓率和影响因素,为制定相关防控措施提供指导。方法:通过分类滚雪球法和网上发布广告形式招募MSM作为目标人群,开展血清学检测和问卷调查。用χ2检验进行单因素分析,Logistic回归分析进行多因素分析。结果:共发出500份问卷,回收444份有效问卷,MSM人群HBsAg阳性率为2.9%,HBsAb阳性率为38.1%,乙肝防治知识知晓率为57.0%。Logistic回归分析显示,同性恋取向、大专及以上文化、艾滋病知识知晓、接受同伴教育者乙肝相关知识的知晓率更高。结论:MSM人群乙肝相关知识知晓率不高,应充分利用主流媒体和新媒体,加强MSM人群中乙肝防治知识的科普和宣传,特别是文化程度较低、艾滋病知识缺乏以及未接受过同伴教育的MSM人群。
文摘目的通过系统的Meta分析,评估中国男男性行为者(MSM)、暗娼和青少年学生群体的毒品使用率。方法本研究检索了2014年1月1日至2023年12月31日间的相关文献,从CNKI、万方、维普、CBM、PubMed、The Cochrane Library、EMBASE和Web of Science数据库中筛选文献,使用统计学软件Stata17.0进行单组率Meta分析。结果最终纳入32项研究,总样本量为68906例。Meta分析结果显示,中国MSM、暗娼和青少年毒品使用率为21.7%(95%CI:19.5%~24.0%)。不同人群、毒品使用类型、抽样方法间存在显著差异。结论MSM群体的毒品使用率显著高于其他群体,且新型毒品的使用率较高。研究结果强调了不同人群及毒品类型的差异,同时需要综合考虑抽样方法对结果的影响。
基金Project supported by the National Natural Science Foundation of China (No. 12272323)。
文摘The double-beam system is a crucial foundational structure in industry,with extensive application contexts and significant research value.The double-beam system with damping and gyroscopic effects is termed as the damped gyroscopic double-beam system.In such systems,the orthogonality conditions of the undamped double-beam system are no longer applicable,rendering it impossible to decouple them in modal space using the modal superposition method(MSM) to obtain analytical solutions.Based on the complex modal method and state space method,this paper takes the damped pipe-in-pipe(PIP) system as an example to solve this problem.The concepts of the original system and adjoint system are introduced,and the orthogonality conditions of the damped PIP system are given in the state-space.Based on the derived orthogonality conditions,the transient and steady-state response solutions are obtained.In the numerical discussion section,the convergence and accuracy of the solutions are verified.In addition,the dynamic responses of the system under different excitations and initial conditions are studied,and the forward and reverse synchronous vibrations in the PIP system are discussed.Overall,the method presented in this paper provides a convenient way to analyze the dynamics of the damped gyroscopic double-beam system.
