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排序方式: 共有97条查询结果,搜索用时 15 毫秒
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Cristina Costa António Arêde Aníbal Costa Elsa Caetano Álvaro Cunha Filipe Magalhães 《International Journal of Architectural Heritage》2015,9(7):760-774
This article aims at presenting and discussing the strategies for updating the finite element numerical modeling of stone masonry arch bridges using operational modal analysis. The study comprehended three bridges: two old ones, the St. Lázaro and the Lagoncinha bridges, and a recently constructed bridge in Vila Fria, Portugal. Updating of the bridge models is performed by comparing the numerical and experimental modal parameters. Three-dimensional detailed numerical models are used to perform modal analysis of the bridges. Experimental modal identification of the bridges is based on the measurement of their acceleration responses during normal operation. The assigned material properties are also based on available results obtained from in situ and laboratory tests and on the results of visual inspection and historical research carried out for both old bridges. 相似文献
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Jean-Marc Mouillie Sylvie Marcq-Bernard Jacqueline Lagrée Sophie Audidière Sophie Peytavin Christian Nadeau Joël Cornette Jean Bernhardt Elsa Rimboux Christophe Alsaleh Fabien Chareix Christian Nadeau Sylvia Giocanti Béatrice Lenoir 《Revue de synthèse / Centre international de synthèse》1998,119(2-3):361-396
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B. F. Leach J. M. Davidson L. M. Horwood 《International Journal of Osteoarchaeology》1997,7(5):481-496
Twenty-four measurements were taken on five of the paired cranial bones and the otoliths of a modern sample of 177 blue cod. Parapercis colias. Regression analysis was performed on these measurements to estimate live fork length and ungutted weight. A number of regression models were examined (linear, logarithmic, exponential and power curve) to work out the optimum estimator for each bone measurement. It was found that live fork length of this species can be estimated with a standard error of less than ±28 mm, and the weight to less than ±140 g. Coefficients are provided for 48 equations linking bone size to live characteristics. This is followed by a study of blue cod from an archaeological site at Waihora in the Chatham Islands. Measurements were made on 8036 archaeological bones with a minimum number of individuals of 2547. It was found that the blue cod catch had near normal characteristics, with a mean fork length of 327 mm and SD of 57 mm. The mean body weight was estimated at 569 g. The usable meat weight represented by these fish is estimated to be 1.0 t. © 1997 John Wiley & Sons, Ltd. 相似文献
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Soil multi-element analysis is now a routine technique employed to help answer questions about space use and function in and around archaeological sites. The pattern of enhancement of certain elements, including P, Pb, Ca, Zn, and Cu, has been shown by numerous studies to correlate closely with the archaeological and historical record. Interpretation of these soil signatures, however, has generally been more problematic. One approach to the problem has been the use of ethnographic or “known” sites to guide interpretation, but how confidently can results from one site be extrapolated to another? This study of abandoned farms tests the site specificity of soil multi-element signatures of past space use through the use of discriminant models. Data analysis suggests that one to one comparisons of similar sites are much less accurate (38% accuracy) than comparisons based on a wider range of sites (59.3% accuracy), even when the latter have contrasting geology. The results highlight the importance of individual anthropogenic practices during occupation and abandonment in the development of diagnostic soil geochemical signatures. 相似文献
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Ronald A. Davidson ? 《Social & Cultural Geography》2013,14(4):481-491
In the context of a shift away from municipal multiculturalism towards community cohesion, and in the light of renewed debates around difference, national identity and Britishness, this article sets out a geographically informed theoretical framework which focuses upon the spatial (re)construction of racial and ethnic identities. The article develops the idea of the everyday as a way of viewing the spatially contingent, complex and negotiated state of inter-ethnic relations in a specific UK city. Not only does this reveal the manner in which strong and stubborn boundaries between social groups are entrenched through the (re)enforcement of spatialised relations of power, but also how accommodations across, between and within difference are realised. Through the employment of empirical material from Leicester, England, the article contends that everyday solidarities emerge from a number of intersecting spatial influences which do not equate to abstract or fixed versions of national belonging. 相似文献
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J.Mark Davidson Schuster 《International Journal of Cultural Policy》2013,19(2):329-354
CULTURAL POLICY AND THE POLITICS OF CULTURE, Forum organised by the Remarque Institute, held at White Oak Conference Center, Florida November 19–22, 1998 相似文献
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