31 research outputs found

    Correlation between use of social software and high risk behaviors of HIV infection among MSM in Beijing

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    目的了解北京市男男性行为者(MSM)社交软件的使用与人类免疫缺陷病毒(HIV)感染及其影响因素的相关性,为今后干预工作提供依据。方法 2016年3—5月,由社区小组招募MSM进行问卷调查,同时进行HIV抗体检测。结果共招募215名MSM,回收有效问卷214份。214人的平均年龄为30.8岁;学历在大专及以上者占73.4%;同性恋者占72.4%;84.6%的人主要通过社交软件寻找性伴。214人中确证HIV感染5人,阳性率为2.3%。分析显示,是否使用社交软件、是否使用同性社交软件和是否使用普通人群社交软件均与HIV感染不相关。多因素分析结果显示,受教育程度高、性取向为同性恋的人更多地使用同性社交软件。63.1%被调查者自述曾经在社交软件上了解到艾滋病防治相关知识,但自述了解程度与是否通过社交软件获得相关信息不相关。结论 MSM社交软件的使用与HIV感染情况无关,也没有增加其对艾滋病知识的了解。但可以考虑改进同性社交软件功能,增加艾滋病防治知识内容,对MSM尤其是高学历、自我定位为同性恋的MSM进行艾滋病防治宣传。[Objective] To understand the correlation between the use of social software and human immunodeficiency virus(HIV)infection and its influencing factors among men who have sex with men(MSM)in Beijing,provide the basis for future intervention work.[Methods]From May to March in 2016,MSM was recruited by community groups to carry out a questionnaire survey and HIV antibody of them was detected.[Results]A total of 215 MSM were recruited and 214 valid questionnaires were recovered. The average age of the 214 MSM was 30.8 years old,73.4% had the education level in college and above,the homosexuals accounted for 72.4%,and84.6% of the respondents mainly found sexual partners through the social software. There were 5 cases of confirmed HIV infection among 214 MSM with the positive rate of 2.3%. The analysis revealed that whether the respondents use the social software,the homosexual social software and the general social software were not related to HIV infection. The results of multivariate analysis showed that people with higher educational level and homosexual orientation were more likely to use the homosexual social software. 63.1% of respondents reported that they had been obtained the knowledge of AIDS prevention and control from social software,but the understanding level was not related to whether the relevant information was obtained through social software or not.[Conclusion]The use of social software has no correlation with HIV infection among MSM,and does not increase their knowledge level of AIDS prevention and control. However,it is necessary to improve the function of the homosexual social software and increase the content of AIDS prevention and control knowledge to carry out the AIDS education among MSM,especially those with higher educational level and homosexual orientation

    Externalities of the Environmental Impact of Land Use and Corresponding Approaches

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    土地利用变化引起的环境影响具有明显的外部性。系统地对土地利用变化环境影响的外部性表现、外部性影响的经济量化分析以及环境影响的外部性对资源配置的影响等进行了分析。并对当前退耕还林(草)工程的外部性给予探讨,对其存在的问题提出了相应的对策

    Trajectory Planning and Motion Analysis of Robot Automatic Grinding and Polishing Impeller Profile

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    为了实现机器人在磨抛加工过程的平稳运行、消除磨抛振动、解决各机械臂的运动突变问题,从轨迹规划方式入手,对机器人的运动轨迹进行了仿真研究。利用Solidworks软件在叶片上规划两种磨抛轨迹,并用Matlab软件对两种磨抛轨迹进行了仿真分析。分析结果表明,采用所提出的基于最小曲率的轨迹提取方法得到的机器人各关节位置、角速度、角加速度的变化幅度,小于传统上基于边缘线的轨迹生成方法相应的变化幅度。基于最小曲率的轨迹提取方法所得机器人运动轨迹变化图显示,在机器人整个运动过程中,各关节位置、角速度和角加速度的变化曲线光滑连续。这说明机器人振动较小。</p

    民族区域自治与少数民族干部培养问题研究

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    本文探讨了广西实行民族区域自治和培养少数民族干部工作中取得的成就与经验,存在的问题及原因,提出了解决这些问题的对策、措施。广西”八五”社会科学重点课

    广西少数民族地区乡镇企业发展战略研究

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    本文介绍了广西少数民族地区乡镇企业的历史和现状,指出其发展的战略意义和地理环境、社会环境、政治环境等方面的有利与不利因素,并从组织结构、资金、人才、技术及企业制度和社会经济协调发展角度提出具体的发展对策。广西区教委课

    A Study of Quercus liaotungensis Community Flora in the Loess Plateau

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    根据吴征镒、王荷生区系分析方法,对秦岭区和陕北区辽东栎群落植物区系进行了比较研究。结果表明,秦岭北坡辽东栎群落共有31科60属67种,陕北区共有27科42属51种。秦岭区辽东栎群落与陕北区相比,物种组成较丰富,层次和层片结构较复杂,两地群落相似性不高,这与两地群落的生境条件关系密切。从属和种的区系成分分析来看,两地辽东栎群落的区系性质是温带的;两地群落中的中国特有种占各自群落中总种数的一半或偏多;地理联系较为广泛,尤其与华北区系联系较为密切,与日本区系有一定的联系

    Research on Key Issues of Laser Welding of Dissimilar Metal

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    现代工程结构要求对异种金属材料进行焊接.激光焊接具有密度高、焊缝深宽比大、热影响区窄以及变形小等特点,成为异种金属材料焊接的有效方法.异种金属激光焊接过程包含多种效应,机制复杂.比如,材料性能差异对焊缝微观组织与宏观性能的影响;焊接熔池的形成、演化机制;熔池凝固过程焊接缺陷及残余应力形成等.围绕异种金属激光焊接过程中的关键问题,国内外开展了诸多研究工作,对此进行了全面阐述.在此基础上,指出异种金属材料激光焊接研究中的不足及发展方向
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