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Dora Silveira Humberto Varum Aníbal Costa Henrique Pereira Laura Sarchi Ricardo Monteiro 《International Journal of Architectural Heritage》2018,12(6):922-935
This article addresses the laboratory testing of a full-scale double-T shaped adobe wall, under in-plane horizontal cyclic loading of increasing amplitude, with the aim of contributing to the understanding of the seismic behavior of adobe structures. The wall was built with lime adobes taken from an existing building and mortar with a traditional composition. The behavior of the wall was assessed in terms of: shear stress versus horizontal drift and moment versus rotation relationships; maximum lateral strength; drift and rotation at peak stress; evolution of stiffness, lateral displacements, dissipated energy, and natural frequency; and damage pattern. The wall exhibited brittle behavior and in-plane strength corresponding to 56% of the vertical load. Cracking was observed with an X-shaped pattern whereas no sliding occurred at its base. This research supported the subsequent development of a repair and retrofit solution and also of numerical models to simulate the seismic behavior of two adobe buildings. 相似文献
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历史时期江南地区水域景观体系的构成与变迁——基于嘉兴地区史志资料的探讨 总被引:1,自引:1,他引:1
安介生 《中国历史地理论丛》2006,21(4):17-29
江南地区水域景观具有很高的研究价值。地处杭嘉湖平原的嘉兴地区水域景观种类繁多,体系完整,其中以水田景观(即圩田)为主体形态。本文以水田及捍海塘建设为例,指出历史时期嘉兴地区的景观体系经历了三个各具特色的发展阶段,即:(一)先秦至南北朝以“三江五湖”为主要标志的原生态景观形态;(二)唐五代直到宋元时期围垦式景观体系的全面形成;(三)明清以来水网如织、陂塘密布式精细化景观(即整治景观)系统的最后定型,揭示出导致这一地区景观变化的最主要动力来自历代人民推动农业与水利事业发展的艰苦努力,进而从一个角度突出地展示了社会生产实践活动与地理环境变迁之间的密切关系。 相似文献
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An De Waele 《Arabian Archaeology and Epigraphy》2005,16(2):154-160
This article discusses seven bone fragments excavated during the second Belgian archaeological campaign at ed-Dur (tomb G.3831, area N). Rather than weaving implements, these objects are identified as the reinforcing bone laths of composite bows. Information on the composite bow in general—origins, structural composition and technical advantages—will be given. Additionally, the question of which types of composite bows could have been present at ed-Dur and what role these weapons could have played at the site are discussed. 相似文献
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试析非洲华人报刊的历史演变与社会功能 总被引:2,自引:0,他引:2
李安山 《华侨华人历史研究》2001,(3):47-57
本文从历史的角度对非洲的华人报刊进行类型分析 ,并探讨华文传媒的社会文化功能。非洲华人报刊的历史大致可以分为四个阶段 ,即 1895— 192 0年代 ,1930— 194 5年 ,194 6—1960年代和 1970年代以后。影响非洲华人报刊发展主要有三种因素 :居留地区或国家的有关政策 ,当地华侨华人的境况和中国的政治局势。这些报刊的演变有一个由少到多 ,再由多到少的过程。报刊的语言经历了从中文到双语再从双语到中文的过程。在其他条件相同的情况下 ,保持中立是华人报刊维持的因素。最后 ,从目前情况看 ,报刊的发行有私人化和独立化的倾向。 相似文献
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This article examines Rwanda's gender equality policies with the intention of contributing to the ongoing debate in the literature on the meaning of gender equality initiatives in authoritarian states. The article evaluates the transformative potential of Rwanda's gender equality policies with reference to deep‐rooted societal norms and practices within which gender inequalities are embedded. To this end, the article draws on in‐depth interviews conducted in Rwanda with a range of stakeholders, as well as on documentary research. It explores the factors informing the Rwandan commitment to gender equality, and the positive developments this has brought about, before identifying five trends that threaten the transformative potential of Rwandan gender equality policies. The authors conclude that while a strong political will and target‐driven policies offer opportunities for promoting gender equality, the transformative potential is jeopardized by the dominance of an underlying economic rationale; the neglect of the ‘invisible labour’ of women; the formalistic implementation of gender policies and their focus on quantitative results; the limited scope for civil society voices to influence policy; and the lack of grassroots participation. 相似文献
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农村公路作为公益性最强的公共基础设施,无疑是农村生产生活、经济社会发展的基础。民和回族土族自治县由于受地区条件的限制,全县大多数乡镇、行政村分布零散,点多面广,落后的交 相似文献
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可持续发展是世界各国的共同选择,是人类生存和发展的条件。20世纪日本在经济发展中遇到了环境被严重污染和破坏的问题,并及时实施了一系列环境保护的政策和措施,全面推进可持续发展战略,对于扭转经济发展过程中的生态环境恶化得了较好的效果。日本的经验、教训及治理对策,对于我国实施可持续发展战略具有重要的借鉴和启示价值。 相似文献
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We analyzed stable carbon and nitrogen isotope ratios of human and animal remains from the Ando shell midden, South Korea. The Ando site is a rare Incipient Chulmun (Neolithic) site (ca. 6000–5000 BC), which contains well-preserved human and animal bones in shell mounds. The stable isotope results for humans (average δ13C = −13.5 ± 0.5‰ and δ15N = 15.2 ± 0.5‰) indicate that Ando people in the Incipient Chulmun period strongly depended on marine resources. There were no isotopic differences between humans of different sex and age at this site. We compared our data with other previous published isotopic data from the Chulmun sites and found that the Ando people had similar isotope values to the southern Chulmun people (Tongsamdong and Daepo), but different isotopic ratios than the western Chulmun people (Daejukri and Konamri). These results indicate that marine foods were the main food resources in the southern coastal regions, but not in the western coastal regions in Chulmun Korea. 相似文献