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体育志愿者服务体系的构建特性 被引量:3
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作者 黄琼 黄玲 《价值工程》 2010年第11期221-221,共1页
体育志愿者组织是伴随着我国青年志愿者和群众体育事业的发展而逐渐产生和发展起来的,构建体育志愿者服务体系,对于促进我国群众体育事业的发展具有重要作用。本文运用文献资料法,界定体育志愿者服务体系的概念,并阐述体育志愿者服务体... 体育志愿者组织是伴随着我国青年志愿者和群众体育事业的发展而逐渐产生和发展起来的,构建体育志愿者服务体系,对于促进我国群众体育事业的发展具有重要作用。本文运用文献资料法,界定体育志愿者服务体系的概念,并阐述体育志愿者服务体系的构建特性。 展开更多
关键词 体育志愿者 体育服务 服务体系 构建特性
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胸膜肺炎放线杆菌自转运粘附素Apa1/Apa2基因敲除菌株的构建及其生物学特性研究 被引量:3
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作者 翟瑞东 王磊 +4 位作者 计群 杨舒心 秦万海 韩文瑜 雷连成 《中国预防兽医学报》 CAS CSCD 北大核心 2014年第2期134-139,共6页
为研究三聚体自转运粘附素(TAAs)对胸膜肺炎放线杆菌(APP)生物学特性的影响,本研究利用自杀性载体系统,通过正负向筛选标记的同源重组方法筛选APP血清5b型L20菌株的TAAs基因Apa1及Apa2的双基因敲除菌株,命名为△Apa1/△Apa2菌株,以野生... 为研究三聚体自转运粘附素(TAAs)对胸膜肺炎放线杆菌(APP)生物学特性的影响,本研究利用自杀性载体系统,通过正负向筛选标记的同源重组方法筛选APP血清5b型L20菌株的TAAs基因Apa1及Apa2的双基因敲除菌株,命名为△Apa1/△Apa2菌株,以野生菌株为对照,比较△Apa1/△Apa2菌株在体外的生物学特性变化,以小鼠为动物模型检测TAAs基因缺失对细菌毒力的影响。体外试验表明,△Apa1/△Apa2菌株在BHI液体培养基中生长速率与野生菌株无明显差异;电镜下观察△Apa1/△Apa2菌株菌体表面粗糙,有絮状物沉积;自凝、被膜形成能力下降;对RAW264.7细胞的粘附效率低于野生菌株。小鼠体内试验表明TAAs基因的缺失导致细菌毒力降低,在肺部和脾脏的定殖菌量明显低于野生菌株,然而两者的病理学差异不显著。本研究表明TAAs影响APP的形态、自凝、被膜形成等特性,并在APP粘附细胞以及对小鼠致病性方面发挥重要作用,为进一步研究TAAs在APP感染机制中的作用奠定了基础。 展开更多
关键词 胸膜肺炎放线杆菌 三聚体自转运粘附素 △Apa1 △Apa2菌株 构建与生物学特性
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基于数据库应用的培训管理系统设计 被引量:1
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作者 姚刚 《无线互联科技》 2021年第5期67-68,共2页
基于数据库应用的培训管理系统不但体现计算机集群构建特性,还可通过数据库设计环节实现预期功能,提升数据存储效率与系统管理有效性,系统各功能的实现也离不开对数据的访问与调取,文章对一个培训管理系统的数据库搭建策略与相关概念定... 基于数据库应用的培训管理系统不但体现计算机集群构建特性,还可通过数据库设计环节实现预期功能,提升数据存储效率与系统管理有效性,系统各功能的实现也离不开对数据的访问与调取,文章对一个培训管理系统的数据库搭建策略与相关概念定义做阐述,以探讨建设有效数据库的意义。 展开更多
关键词 数据库应用 计算机集群 构建特性 培训管理系统 计算机研究
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Strengthening and Restoration of Historical Structures Mirahor Ilyas Beg Mosque in Korca
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作者 Enea Mustafaraj Yavuz Yardlm 《Journal of Literature and Art Studies》 2013年第12期809-818,共10页
The Mirahor Ilyas Beg Mosque, built in 1496 in Korea, is one of a few Ottoman mosques still existing in Albania and the only Ottoman monument in the city. The mosque was built using cut stone and brick. It has a stron... The Mirahor Ilyas Beg Mosque, built in 1496 in Korea, is one of a few Ottoman mosques still existing in Albania and the only Ottoman monument in the city. The mosque was built using cut stone and brick. It has a strong image a cubic mass rising over a square plan. Inside there are found pictures of the mosque in the past and different famous mosques. During its existence, it was damaged from many earthquakes occurring at this area. Due to amortization, the mosque's structural properties were weakened and architectural values were dimmed. Proper strengthening methods need to be applied, not only to improve structural conditions, but also to preserve architectural features of the mosque. In this paper assessment of existing conditions of the structure is carried out Based on the obtained results, solutions for the structural problems are investigated. As for restoration, the repair methods to be applied were examined taking into consideration at what extent the historical values of the building will be preserved. The proposed strengthening methods are the ones which would affect the least the mosque's historical values. 展开更多
关键词 HERITAGE masonry buildings structural assessment mosque retrofit RESTORATION
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Experimental study on seismic characteristics of typical mortisetenon joints of Chinese southern traditional timber frame buildings 被引量:27
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作者 CHUN Qing YUE Zhi PAN JianWu 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第9期2404-2411,共8页
The seismic characteristics of four typical mortise-tenon joints of Chinese southern traditional timber frame buildings were researched, including Yanwei mortise-tenon joint (including dropping Yanwei mortise-tenon j... The seismic characteristics of four typical mortise-tenon joints of Chinese southern traditional timber frame buildings were researched, including Yanwei mortise-tenon joint (including dropping Yanwei mortise-tenon joint), Shizigutou mortise-tenon joint, Ban mortise-tenon joint and Mantou mortise-tenon joint. Experiments on thirteen specimens were carried out. Failure modes, hysteresis curves, skeleton curves and rotational stiffness were studied. The results provided a theoretical basis for seismic research, protection and maintenance of Chinese southern traditional timber flame buildings. 展开更多
关键词 Chinese southern traditional timber frame building mortise-tenon joint seismic characteristics rotational stiffness
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