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1.
Rodrigo Gil is one of the greatest masters of Spanish architecture. His brilliant career is partially explained by the efficiency of his design methods and his building techniques, especially evident in his ribbed vaults. If we examine the latter as a whole, the first aspect to be noted is undoubtedly their great formal complexity. However, the detailed study discloses that rather limited geometric and building techniques are hidden behind those elaborated patterns, aimed at simplifying and making the execution more economical. In order to bring some of these devices to light, one of his best-known vaults was selected for an in-depth study. The construction of a large-scale model of it also revealed some interesting features regarding the placing of the centerings and shorings during the erection.  相似文献   

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The rise of oral history is a new trend in historical studies in China that began in the late twentieth century. This promising tendency has so far achieved important results in two areas: theoretical exploration and oral interviews. This article proposes the theory of oral history’s four realities and three curtains and by so doing preliminarily clarifies the relations among historical memories, historical narratives, and the authenticity of oral history. These theories represent the current understanding of the discipline of contemporary Chinese history in regard to the core questions of oral history. Oral history in China has currently reached a new phase of self-conscious disciplinary construction and has the following tentative plans: to strengthen the study of basic theories and methods of oral history; to intensify the training of talented scholars and to establish a professional group of oral historians; to promote the general implementation of oral history projects; to create new oral history websites and academic journals, and to prepare for the establishment of oral history archives in China.  相似文献   

4.
四川省实施天然林资源保护工程和退耕还林工程   总被引:2,自引:0,他引:2  
1998年夏秋之际 ,长江中上游地区发生了历史上罕见的特大水灾。 8月 2 0日 ,四川省人民政府在全国率先作出重要决定 :从 9月 1日起 ,在阿坝、甘孜、凉山、攀枝花、乐山和雅安三州两地一市 ,实施天然林资源保护工程 ,禁止采伐天然林 ,关闭工程区内木材交易市场。不久又将这一禁伐令扩大到全省范围内。 1 999年 1 0月 ,为了建设长江上游生态屏障 ,四川省政府再次决定两年内在 1 2 0个县 (市 )完成 30 0万亩退耕还林试点任务。以上重要决定的制定和实施 ,对于从根本上扭转本省森林面积下降 ,遏制生态环境恶化 ,促进国民经济的发展和人民生活的改善 ,无疑具有十分重大的生态、经济和社会效益。  相似文献   

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This study aims to present the results of the historical and statistical analysis carried out on the monitoring systems that control one of the most studied domes in the world: Santa Maria del Fiore in Florence, Italy. An accurate analysis of the dome crack widths and of its global displacements (horizontal and vertical), both considering the historical data and more recent data, has allowed detection of the static movements developed in the monument over time as well as in context of their relationship to environmental and seismic phenomena. Thanks to the large amount of measured data (from 1955 to 2010), some previous conclusions on the dome damage trend are updated herein. Moreover, in light of the experimental results, some issues on the dome stability—as the principal hypotheses advanced during centuries about the main cause of Brunelleschi’s dome crack pattern—are reconsidered, including the horizontal thrusts due to the dome’s self-weight characterized by Viviani in 1695 and Chiarugi in 1985, the differential settlement of pillars detailed by Cecchini in 1698, Ximenes in 1757 and Borga in 1975 and the influence of temperature variations investigated by Nervi in 1934. The final aim of this study is to show the great utility of modern and historical monitoring in setting up a reliable forecasting model of the monument.  相似文献   

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我国在不同年代、不同区域、不同机构相继开展了古建筑彩画不同的科技修复保护技术,但缺少对科技保护历史沿革比较、科技保护修复效果评价研究,亟需建立科学、客观、符合我国实际的古建筑彩画修复保护评价体系。 本研究为国家文物局重点科研基地自筹经费项目“彩画保护科技历史沿革及效果评价研究”部分研究内容,选取经过至少5年保护效果、且前期资料较完备的全国10处典型古建筑彩画进行详细调研,并根据调研结果,选择其中5种加固材料进行了实验室模拟试验,对颜料层保护材料加固性能进行评价,期望为古建筑彩画的保护材料选择提供可靠的实际案例及实验数据支撑,为文物保护和相关材料评价提供新的参考和启示。  相似文献   

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Following on from Thijs Maarleveld's paper in 1995 on type-names for archaeological finds of ships, the use of the term cog has been questioned by Timm Weski, who suggested the archaeological term Ijsselmeer-type instead. The present paper surveys a total of 18 ship-finds of this type with respect to date, origin and year of investigation, without finding support for the proposed change in terminology. Instead, the archaeological term cog should be restricted to seagoing vessels of the 12th–15th centuries which share the structural features of the lower part of hull with the Bremen Cog.
Recent results of dendroanalysis point to the root of the Jutland peninsula as a more likely area than the former Zuiderzee for the transformation of a hypothetical older'proto-cog'-type for navigation on rivers and in the Waddensee into the proper seagoing medieval cog-type. Impulses for this transformation were found, most likely, in the need to circumnavigate Cape Skagen already in the 12th century, and technical features were probably taken over from large Scandinavian cargo ships of that period. © 2000 The Nautical Archaeology Society  相似文献   

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Abstract

Over the last few decades, conservation work has been conducted by the Department of Antiquities of Jordan (DoA) on the Roman Nymphaeum in Amman. This intervention has taken the form of direct and indirect actions. In this article it will be shown that the conservation works concentrated on reinforcing the structure and reconstructing some architectural features of the building, with little consideration of the techniques and materials used. Intervention actions were mostly poor in terms of their scientific approach, and neither proper planning nor a well-defined methodology existed. This study provides a holistic approach for the evaluation of the state of the conservation of the monument in terms of quality and quantity. Thus, the results could be a valuable source for establishing comprehensive risk mitigation for future restoration work and site management. In addition, establishing practical restoration guidelines could help in developing socio-economic benefits for the community through tourism.  相似文献   

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新时期以来当代中国史研究日益受到学界重视,取得了引人瞩目的研究成果。近几年来,当代中国史研究出现了新的发展态势,越来越多的学者提出了要加强与政治史、经济史、文化史并列的社会史研究,强调以整体视角来拓展与深化当代中国史研究,这既蕴涵着学术演进的内在逻辑支配,又有着与外在的社会现实相契合的时代机遇。在此发展背景下,一些国史学者从宏大叙事转向微观实证,致力于地方、社会层面的微观研究,重视地方史料的发掘与整理,取径民间,以区域或地方为个案进行实证研究,力求在地方史或区域史研究的基础上把握总体史的样态。因此,很有必要从方法论的角度,以社会史为视角检讨当代中国史研究的开拓与进展,从而推动社会史这一新的学科的建设与发展。  相似文献   

10.
20世纪90年代以前美国环境史研究的特点   总被引:3,自引:0,他引:3  
高国荣 《史学月刊》2006,8(2):105-114
在20世纪90年代以前,美国环境史研究具有以下三个特点:就研究范围而言,研究的主要问题都属于自然保护和资源保护的范畴,荒野研究成为美国环境史研究最鲜明的特色,而城市及人工环境则未受到应有的重视。其次,从价值取向上说,环境史研究具有显著的环境保护主义的道德和政治诉求。环境保护主义既使环境史受益,使环境史具有鲜明的文化批判意识,同时,它也限制了环境史的未来发展。最后,环境史研究具有比较明显的时空特点:就时间而言,它研究的主要是近现代;就空间而言,美国环境史优先研究的地域首先是西部,其次是东北部,最后是南部。  相似文献   

11.
对中国考古类型学研究方法的反思   总被引:2,自引:0,他引:2  
为了提高中国考古学研究水平,我们既要在考古类型学的宏观和微观研究上下功夫,又要在实践中不断总结和归纳出一些新的理论和方法,使考古类型学不断得到提高和完善。  相似文献   

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20世纪40年代,六朝瓦当已有零星出土,但直到20世纪90年代,学术界才真正建立起六朝瓦当的学术体系。迄今,六朝瓦当已成为东亚地区多个国家考古学者关注的话题,其造型、类别、年代、特征、技艺、分区、分期、传播、地位等一系列问题得到了广泛的讨论,从而建构了一个跨文化的学术话语体系。总结六朝瓦当的发现和研究过程,有助于推动这...  相似文献   

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ABSTRACT

A principal reason of damage in historic masonry vaults consists in relative displacements of the vaults’ abutments. Excluding the case of seismic-induced damage, cracks are often produced by differential settlements generated by the lateral wall instability or soil degradation (e.g., due to stress concentrations, non-uniform soil stratigraphy, flooding phenomena etc.). When dealing with historic vaults, the effects of long-term deformation processes cannot often be linked directly to causes, which may also be unknown. In this article, the effects of differential settlements on historic masonry barrel vaults are investigated. An efficient 3D contact-based model was developed to reproduce experiments on a scaled pointed barrel vault (representative of a typology of late-medieval barrel vaults in Scotland) under non-uniform differential settlement. First, the numerical model is used to simulate the experimental campaign, achieving good agreement in terms of crack pattern (longitudinal shear) and transverse-longitudinal deformation profiles. Then, further analyses are carried out to gain insight on the effects of several plausible uniform and non-uniform settlement patterns on representative historic barrel vaults. Various settlement configurations were analysed and complex failure patterns observed. This study could help analysts in understanding the nature of on-going deformation process in historic masonry vaults and engineers in the design of strengthening strategies.  相似文献   

14.
根据陶器类型学研究,把花厅墓地分为四期。把拥有玉琮、玉梳背饰、玉项饰的墓作为大型墓,把拥有玉镯、环等装饰品的墓作为中型墓,把只有陶石器等的墓作为小型墓。根据形态分析,把随葬陶器分为大汶口式、良渚式、薛家岗式、大汶口一良渚式和大汶口一薛家岗式五类,把玉器分为良渚式、花厅式和融合式三类。从死者头向、葬猪习俗、随葬品组合等方...  相似文献   

15.
One of the founding texts within the history of Nordic conservation is ‘Förslag till inrättandet af Riksparker i de nordiska länderna’ (A Proposal for Establishing Nation’s Parks in the Nordic Countries), written by the Finnish-Swedish scientist and explorer Adolf Erik Nordenskiöld (1832–1901) in 1880. It is comparable to influential texts of US environmental history, such as George Catlin’s Illustrations of the Manners, Customs, and Condition of the North American Indians (1845–1848) and George Perkins Marsh’s Man and Nature (1864). The ideas developed in the essay are expressions of an environmentally literate person. Nordenskiöld perceived destructive developments taking place in the environment and set down proposals to prevent or remedy this undesirable situation. This article will discuss the historical roots of Nordenskiöld’s conservational philosophy, such as the modernization process, patriotic ideas from the Romantic era, and, above all, the influence of US thinkers, most notably George Catlin, who proposed the opening of ‘nation’s Parks […] on the great plains of the West’. The influence of Nordenskiöld on the subsequent conservation movement in Finland and in Sweden will be examined in detail. The first national parks in Europe were established in Sweden in 1909.  相似文献   

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This study analyzes the static behavior of the rounded cross vaults based on the limit analysis approach developed for masonry structures and adopts a rigid no-tension constitutive model with no sliding. The kinematic theorem of the limit analysis with a compatible tridimensional mechanism is applied on these structures with the aim of evaluating the minimum thrust. In this way it was possible to build some abaci in which the ratio between the minimum thrust and the weight is plotted versus the geometrical characteristics of the vaults. Finally, the proposed abaci are used to calculate the thrust of the main vault of the Diocletian Baths in Rome.  相似文献   

17.
在保存状况调查与评估的基础上,以最大限度揭示相关考古信息为目标,对新出土的一件隋代铜壶进行了保护修复研究。在整个保护修复过程中,涉及到的观察分析与研究方法包括:光学显微观察(OM)、X光探伤(XR)、X-射线荧光(XRF)、扫描电镜能谱分析(SEMEDS)等,由此可以对这件铜壶的材质和制作工艺有所了解。最后对关于出土文物的保护修复原则等相关问题进行了讨论。  相似文献   

18.
Nature conservation in the UK comprises not only a response to the perceived impacts of rationalization on nature but is itself a dimension of that process of rationalization. The paper describes the development of conservation institutions and ideologies in the UK and considers the ways in which ecology (and particularly ideas of nature as equilibrium) have provided the intellectual framework for conservation. Ecology underpinned the establishment of government conservation institutions, provided intellectual strategies for classifying and objectifying nature, and provided the knowledge base for the control and management of nature. The paper discusses the implications of non-equilibrial ideas in ecology for ideas and practice in conservation and the implications of responses to them in the form of re-rationalization.  相似文献   

19.
In 1987, given the importance and complexity of the correct recovery and conservation procedures for underwater archaeological finds, an Underwater Archaeological Operations Unit was set up within the Italian Central Institute for Restoration. This Unit is made up of archaeologists, conservators, biologists and chemists, all of whom are underwater experts. It provides consultancy services and scientific and technical assistance for problems relating to the recovery, conservation, protection, and restoration of underwater archaeological heritage at the request of the Archaeological Superintendents. Great attention is paid to the professional training of underwater conservators. Specialized courses in the conservation of materials of underwater provenance are organized as part of its programme. This paper illustrates some of the main initiatives both in the restoration of archaeological objects and in training, in which the Institute has been involved, since the Underwater Unit was created.  相似文献   

20.
\"月明沧海\"琴为上海博物馆藏品,元至正壬辰(公元1352年)制造。琴额部有两处木质缺洞,木质纤维素腐烂,蛀眼19个,额部其它部位漆颜色暗淡,琴左侧面下方、琴额背面均有缺损。对这件古琴制定修复方案,并开展清洁、处理蛀洞、分析灰胎、加固、补配、批灰、涂漆、打磨、做旧等保护修复工艺流程。结果表明,传统修复工艺与现代科学技术检测的结合,使此件文物的修复工作相当成功。  相似文献   

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