首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1013篇
  免费   16篇
  2024年   2篇
  2023年   5篇
  2022年   13篇
  2021年   14篇
  2020年   24篇
  2019年   17篇
  2018年   21篇
  2017年   20篇
  2016年   38篇
  2015年   16篇
  2014年   22篇
  2013年   68篇
  2012年   42篇
  2011年   66篇
  2010年   67篇
  2009年   65篇
  2008年   63篇
  2007年   77篇
  2006年   76篇
  2005年   67篇
  2004年   39篇
  2003年   53篇
  2002年   49篇
  2001年   38篇
  2000年   24篇
  1999年   15篇
  1998年   8篇
  1997年   1篇
  1996年   7篇
  1995年   4篇
  1994年   1篇
  1993年   1篇
  1992年   1篇
  1991年   2篇
  1990年   1篇
  1983年   1篇
  1981年   1篇
排序方式: 共有1029条查询结果,搜索用时 15 毫秒
31.
The judicial system in Qing Beijing integrated both Ming and Manchu institutions. In the Ming judicial system, the first level of courts in Beijing included the Ministry of Justice and the Censorate, and on the second level was the Court of Judicial Review. During the Ming, however, this system became heavily disrupted by the intelligence security apparatuses, like the Eastern Depot. In the Manchu system, on the first level of courts was the banner company captains and on the second level was the Ministry of Justice. After 1644, the Ming’s institutional legacies and lessons remained so important to Manchu rulers that they eventually created an integrated legal system that primarily drew from the Ming system. This integration reflected the Qing dynasty’s endeavor to adopt Ming institutions. Prince Regent Dorgon insisted upon judicial separation on the first level of the courts—Censors of the Five Wards could not settle cases involving banner people, nor could the banner system handle cases involving civilians—while the Shunzhi emperor and his successors wanted judicial unity in Beijing and ordinary banner people and civilians to be adjudicated by the same courts.  相似文献   
32.
ABSTRACT

The 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   
33.
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   
34.
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   
35.
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   
36.
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   
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.
"十三五"以来,我国文化遗产保护事业进入新阶段,但是文化遗产管理体系复杂、多头管理、权责不明等问题一直未得到解决.因此,国家文化公园建设过程中,应首先理顺国家文化公园与既有遗产保护体系之间的逻辑与关系,建立以重大文化遗产为主体的国家文化公园体系;以保护传承为首要目标,构建统一规范高效的国家文化公园管理体制;突出国家代表...  相似文献   
39.
周明圣 《史学月刊》2006,10(12):75-79
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   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号