汶川大地震后城乡防灾与救灾策略探讨

本文通过对5.12汶川大地震灾后现场灾情以及灾后救助、抢险、规划重建工作等方面的调查,分析了目前的防灾现状水平,对城市防灾体系、救灾体系的建设,居民防灾意识的培养与训练,防灾、救灾策略及系统运作提出建议,供防灾减灾科学研究,政府机构制定相应政策法规,各职能部门的防灾、救灾运作参考

HBeAg特异免疫复合物检测及临床意义

采用单克隆抗－ＨＢｅ固相ＥＬＩＳＡ法检测１１８例ＨＢＶ感染者血清中ＨＢｅＡｇ特异免疫复合物（ＨＢｅＡｇ／ＩＣ），结果表明∶ＨＢｅＡｇ／ＩＣ与ＨＢＶ复制相关，可作为ＨＢＶ复制的一种血清学标志，ＨＢｅＡｇ阴性、ＨＢＶＤＮＡ阳性者中，６２．２％患者ＨＢｅＡｇ／ＩＣ阳性，提示ＨＢｅＡｇ／ＩＣ的形成致使夹心法不能检出ＨＢｅＡｇ，这类患者仍可以是ＨＢＶ野毒株感染，并非均为ＨＢｅＡｇ缺陷变异株感染；ＨＢｅＡｇ／ＩＣ阳性血清ＡＬＴ异常率明显高于ＨＢｅＡｇ／ＩＣ阴性血清（Ｐ＜０．０１），提示ＨＢｅＡｇ／ＩＣ存在与肝损伤有关

Non- linear analysis on the performance of buckling restrained brace concrete school building

本文以一个中小学校舍抗震加固设计的实际工程为例,研究的目的是分析防屈曲支撑的滞回曲线,采用非线性时程分析的方法,简单介绍防屈曲约束支撑在MIdAS软件中非线性时程分析的应用过程,得到防屈曲支撑的滞回曲线与试验的滞回曲线相吻合。Taking an actual school building's seismic design as an example,The purpose of the study is the analysis of buckling- restrained brace hysteretic curve,Method using nonlinear time- history analysis,Application of nonlinear dynamic analysis in MIDAS software,the buckling restrained brace against simple introduction,Get buckling- restrained brace hysteretic curve and the experimental hysteretic curves coincide

砌体防倒塌钢桁架加固方法研究

上世纪后30年,我国建造了大量砌体结构,而现用中小学校舍占有其中相当的比例。对于砌体结构的改造与加固在现时代仍具有十分重要的意义。本文提出了一种利用钢桁架对砌体结构进行防倒塌加固的方法,包括计算假定以及设计理论,并且给出了该加固方法的设计流程。分析表明,防倒塌钢桁架加固方法,在提高结构系统的安全储备方面可以发挥重要作用,是一种经济可行的对砌体结构加固的新方法

NUMERICAL SIMULATION of THE CHARACTERISTICS of TYPHOON WIND-FIELD IN XIAMEN REGION

基于1959年~2008年厦门地区的台风详细资料,采用yAn MEng风场模型进行台风数值模拟,得到了台风极值风速序列,并推算出厦门地区不同重现期的极值风速,与年极值风速实测资料统计结果及现行规范值进行比较,为结构抗风设计提供了更为合理的荷载信息;同时,讨论了风向对极值风速分布的影响,为正确选择建筑方位提供理论指导。最后,基于yAn MEng风场不同半径位置处风剖面的变化规律,提取厦门地区沿高度的极值风速,研究了台风条件下的风剖面规律。Based on observed data of typhoons in Xiamen region during 1959- 2008, numerical simulation of typhoon is conducted using the Yan Meng wind-field model to obtain the extreme wind velocity series.Then, extreme wind velocity for different return periods is estimated and compared with the statistical results of the observed data of annual extreme wind velocity in Xiamen region, as well as the current structural code, to provide more accurate wind load information for the wind-resistant structural design.Furthermore, the effect of wind direction on extreme wind velocity is discussed in this paper to provide theoretical guidance of choosing appropriate building direction.Finally, gradient wind level as well as typhoon-governed wind profile in Xiamen region is proposed based on numerical simulation of the Yan Meng typhoon wind-field model.土木工程防灾国家重点实验室开放课题基金项目(SLDRCE10-MB-01); 厦门市建设科技项目(2011-2-1

翼墙在中小学校舍抗震加固中的应用

翼墙加固是一种易用的改变结构体系的快速有效的加固方法,具有概念明确,施工方便,造价低廉,加固效果好的特点。探讨了翼墙加固原理和设计方法,通过一项实际工程,讲述该方法的应用过程和具体构造措施

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

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

利用加设钢支撑改变单跨框架结构体系的抗震加固效果研究

单跨框架结构大量存在于中小学建筑中,中小学建筑已提高到乙类设防,根据抗震鉴定标准GB50023-2009,框架结构不宜为单跨框架;乙类设防时,不应为单跨框架。单跨框架是一种抗震严重不利体系,缺乏冗余约束,易发生整体倒塌。若从构件加固层次提高建筑的抗震性能,不但造价高、施工复杂,而且效果也不明显。加设支撑是一种改变建筑结构体系的方法,本文结合工程实例,讨论了加设钢支撑后原结构性能变化以及加固过程中应该注意的问题。研究表明,利用支撑改变结构受力体系,可以明显改善结构性能,提高抗震能力

11例脂肪栓塞法医学鉴定分析

目的探讨脂肪栓塞法医学鉴定的思路及注意要点。方法回顾性分析某司法鉴定中心2007年1—12月共计11例脂肪栓塞死亡的案例,观察HE切片及苏丹IV染色切片。结果 11例肺组织内均见大量脂滴,2例脑和其他脏器小血管内见脂滴,肝脂肪变性6例。结论结合案例分析脂肪栓塞栓子来源,临床表现和死亡机制,总结出脂肪栓塞案件鉴定的一些经验和工作思路

细菌铁蛋白氧化还原特性及电极活性的研究

棕色固氮菌细菌铁蛋白能直接快速地从金属铂电极上得到电子或提供电子给铂电极。经－６００ｍＶ（相对于ＮＨＥ）还原电位处理后，还原态细菌铁蛋白在可见光谱区中（３８０－５８０ｎｍ）所呈现的整体吸收光谱强度明显高于氧化态细菌铁蛋白的吸收光谱强度。经氯化钴处理后的细菌铁蛋白表现出较弱的电极活性及释放铁的速率明显下降。此外，细菌铁蛋白在体外模拟棕色固氮菌整体细胞内的微量氧环境体系中仍有氢还原现象，因而推测细菌铁蛋白在该菌体内也能进行吸氢反应。细菌铁蛋白是一种类似有吸氢氢酶功能的蛋白