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排序方式: 共有1127条查询结果,搜索用时 31 毫秒
31.
Marica L. Pecorelli Rodolfo Epicoco 《International Journal of Architectural Heritage》2020,14(4):630-644
ABSTRACTThe interest in automatic modal parameter extraction techniques has increased significantly in recent years because of the rising demand for Continuous Structural Health Monitoring (CSHM) of civil structures and infrastructures. The wider use of CSHM is related to its capability for early damage detection and therefore to its usefulness for planning maintenance and strengthening interventions. This article presents the main steps followed in creating a robust routine to run on an online basis the first-ever Continuous Vibration-Based Structural Health Monitoring (CVB-SHM) of a large masonry oval dome, i.e., the dome of the Regina Montis Regalis Basilica, also known as Sanctuary of Vicoforte. The procedure uses an output-only stochastic subspace identification method complemented by an automatic analysis applied to identification results, which are typically provided in terms of stabilization diagrams. In this study, the fully automatic procedure also includes a hierarchical clustering algorithm to separate authentic from spurious modes. 相似文献
32.
敦煌文献中保存了许多唐五代时期地方各级水利官吏的设置运作状况记录。唐代前期设都水令,为当时敦煌“统以千渠”的最高级别水利官员。中唐吐蕃统治时期设“水官”“部落水官”以及“水监”“部落水监”“地方总水监”。晚唐五代归义军时期专设水司,长官为都渠泊使,下设多名水官。敦煌绿洲四界及寿昌灌区分别设置多名有特殊责任的水官“平水”,以“平治水利”,平水“相量”为务。此外,每条灌渠、每座斗门均设渠头或斗门长,属基层一级。这套水利官吏系统层层负责,相互配合,有效保证了农田灌溉顺利进行。同时敦煌民间还自发地组织起一批“渠人社”,这对地方政府水利管理体系是有益的补充。研究历史上水利官吏系统及其运作状况,对今天河湖运行和治理管护也具有借鉴作用。 相似文献
33.
Nigel Walford 《Journal of Geography in Higher Education》2017,41(3):310-326
The arrival of the term Geographical Information System (GIS) in the 1960s soon created a demand for training and education in the use of this specialist hardware and software. Initially the main focus was on training people to use GIS, formal named degree programmes leading to postgraduate and undergraduate qualifications arrived later. This paper explores the changing landscape of U.K. degree level GIS education drawing on contemporary information from Higher Education Institution websites and a case study of the first single honours degree in GIS in Europe. The paper identifies a rise and fall in the number of named undergraduate “GIS” degrees since the late 1980s sandwiched between the continuation and development of postgraduate qualifications. In parallel with this trend the teaching and learning of GIS skills has emerged as a core component of undergraduate degree programmes with “Geography” in their title and in national school and degree level benchmarking statements for the discipline. 相似文献
34.
Debates on how to address societal challenges have moved to the forefront of academic and policy concerns. Of particular importance is the growing awareness that to deal with issues such as ageing, it will be necessary to implement concerted efforts on technological, social, institutional or political fronts. Drawing on a number of theoretical perspectives – including socio-technical transitions and embedded state theory – the aim of this paper is to identify and understand different approaches to the governance of such system innovations by comparing state responses to assisted living in two contrasting national systems of care, namely that of the UK and Norway. Its findings highlight that state-supported and funded experimentation projects have been instrumental in designing and implementing system innovation: through their emphasis on co-design and co-creation, these projects demonstrated the value of early implementation pilots to explore the ‘fit’ between novel technologies and prevailing practices and institutional structures in national systems of care. Still, competition, biases or conflicting interests should not be ignored between well-established agents and institutions and experimental solutions whose efficacy remains relatively untested and which involve a combination of new technical, social, organizational and institutional solutions. 相似文献
35.
A critical review of entrepreneurial ecosystems research: towards a future research agenda 总被引:1,自引:0,他引:1
The entrepreneurial ecosystem (EE) literature has attracted much attention, especially in policy circles. However, the concept suffers from a number of shortcomings: (1) it lacks a clear analytical framework that makes explicit what is cause and what is effect in an EE; (2) while being a systemic concept, the EE has not yet fully exploited insights from network theory, and it is not always clear in what way the proposed elements are connected in an EE; (3) it remains a challenge what institutions (and at what spatial scale) impact on the structure and performance of EE; (4) studies have often focused on the EE in single regions or clusters, but lack a comparative and multi-scalar perspective and (5) the EE literature tends to provide a static framework taking a snapshot of EE without considering systematically their evolution over time. For each of these shortcomings, we make a number of suggestions to take up in future research on EE. 相似文献
36.
This is a study of the Sanguo yanyi (hereafter Yanyi), one of the four great literary classics of China, in terms of its political standpoint, character evaluation, and character development. It questions the traditional views related to Yanyi’s stance of revering Liu Bei 劉備 and belittling Cao Cao 曹操. The argument here is that the novel's political standpoint is mainly based on zhongyi 忠義 (loyalty and righteousness), rather than lineage, benevolence, and other factors. Although Yanyi has a clear political position, it is relatively objective and neutral in evaluating historical figures from different camps. The character development of Yanyi is very successful. The character images are round and rich, rather than flat and stereotypical. Both positive and negative characters have their merits and weaknesses. 相似文献
37.
GIS技术在萨拉乌苏考古遗址公园规划设计中的应用 总被引:1,自引:0,他引:1
传统规划设计工作的技术平台多以计算机辅助设计(CAD)为主,本工作以内蒙古自治区鄂尔多斯萨拉乌苏考古遗址公园规划为例,将Arc GIS Desktop作为技术平台应用到公园的规划设计工作中。首先,通过对规划区的实地踏勘,采集相关数据和资料,进行规划区数据库建设;其次,在数据库建设的基础上,通过GIS技术构建与现实环境对应的虚拟地理信息空间,实现规划区景观的三维可视化;最后,利用三维景观模型对现实地理环境进行模拟、分析及虚拟场景飞行。不同于传统CAD的二维工作平台,本工作借助GIS对空间数据和属性数据的强大处理功能及其三维景观可视化模块,为实现内蒙古鄂尔多斯萨拉乌苏考古遗址公园的科学规划提供辅助。 相似文献
38.
39.
19世纪30~40年代是近代法国社会、经济发展和变化的重要时期。在这个时期,资产阶级共和派为继承大革命精神、发扬共和原则和实现共和制度,进行了持续的斗争,共和运动因此勃兴。这场共和运动方式多样,派别众多,为法国最终确立共和制度打下了坚实的理论和群众基础。 相似文献
40.
内乡县衙所存遗迹是清末章炳焘时代留下的。清末县衙的东西两路与明代及清光绪重建前大不相同。今天按照明清两代地方志复原的建筑群,不仅与章炳焘所留的清末旧衙署基本没有什么关系,与历史记载中的明内乡县衙也相去甚远。鉴于该衙正成为史学界研究明清官僚政体的新史料,弄清楚它的沿革、遗迹和现状间的关系是必要的。中国衙署建筑所存遗迹极稀贵,如内乡县衙可反映行政制度变迁者更少,故应特别慎重对待。 相似文献