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   139篇
  免费   3篇
  2024年   1篇
  2023年   1篇
  2022年   1篇
  2021年   3篇
  2020年   4篇
  2019年   6篇
  2018年   12篇
  2017年   9篇
  2016年   11篇
  2015年   2篇
  2014年   5篇
  2013年   12篇
  2012年   6篇
  2011年   4篇
  2010年   3篇
  2009年   8篇
  2008年   3篇
  2007年   7篇
  2006年   4篇
  2005年   4篇
  2004年   7篇
  2003年   4篇
  2002年   2篇
  1999年   2篇
  1998年   3篇
  1997年   2篇
  1996年   6篇
  1995年   1篇
  1994年   1篇
  1993年   4篇
  1992年   1篇
  1991年   3篇
排序方式: 共有142条查询结果,搜索用时 31 毫秒
1.
四川省馆藏文物保存环境监测区域中心(简称四川区域中心)平台,经过两年多的运行实践,实现了12家博物馆监测站的集成联网。本研究分析了区域中心监测平台运行中常见故障现象的表现形式、故障原因及故障率。结果表明:监测平台的主要故障现象为传输异常和数据异常;除温湿度外的其他监测终端故障率较高;软件平台建设也不够完善,导致数据利用率低,尚不能实现风险评估、预测预警和预防调控等管理功能。针对分析发现的问题,提出一些相应的技术措施和管理措施,为有效降低故障的发生率,提升国内区域中心平台建设提供一定的指导和参考。  相似文献   
2.
Turkey’s regional policies are inspired by the new regionalism theory. During past two decades, key concepts of new regionalism, including knowledge economies, specialization, networked cities and innovation, have been incorporated in policy documents. At the same time, Turkey comes from a strong central state tradition that controls local and regional development. At first insight, new regionalism and strong central state control do not fit in the same frame. This research analyses the trajectory of regional policies in Turkey with the aim of explaining how these seemingly incompatible policies can coexist. It argues that regional policies developed at the central state level utilized new regionalism as a part of the strategy to maintain power in the course of transformation of the nation state.  相似文献   
3.
We describe the formulation and application of an integrated general regional seismic loss assessment (RSLA) method for buildings in seismic regions. An efficient method for RSLA is valuable for engineers involved in city planning, risk management, and insurance dealings. In contrast to previously reported methods, the framework presented herein is hazard-based and utilizes a regional rapid seismic hazard deaggregation tool that allows regional assessment to be conducted more efficiently. The proposed technique is implemented as an example to assess general regional seismic loss in Los Angeles County for a ground motion hazard with 10% probability of exceedance in 50 years.  相似文献   
4.
江西省区域经济发展空间差异研究   总被引:20,自引:0,他引:20  
俞勇军  陆玉麒 《人文地理》2004,19(3):41-45,30
区域差异历来是政府关注的重要问题,也是区域发展理论研究的主要课题。江西省受周边强经济中心的影响,经济区位边缘化趋势明显。近年来江西省突破原来农业大省的发展思路,致力引进发达地区和国外的技术和资金,工业化水平明显提高。目前江西省内部地区差异较1990年明显扩大,而且表现出各地区相对波动较大的特征。本文采用偏离一份额模型,对江西1990-2001年间11年来的发展状况分两个阶段进行分析,探讨江西省区域经济发展差异的空间结构特征,将江西划分为4种发展类型。江西省各地区区位条件的变化是其经济发展空间差异的驱动因素。  相似文献   
5.
Today's domesticated plants not only embody past human–nature interactions, but also reflect social history. Human seed exchange, replacement and loss are important forces in shaping crop diversity. This essay explores regional history in relation to the shaping of maize diversity in the western highlands of Guatemala. This is an area of exceptional maize heterogeneity and a peripheral part of the region where maize was domesticated. Maize diversity seems to have developed through geographic isolation in networks of seed exchange that were generally very local in scope. However, recent studies on Mexican maize suggest otherwise. However, few studies have examined crop diversity or seed exchange from a historical perspective. A closer examination of regional history suggests which processes might be important for shaping the present geographical distribution of maize diversity. Seeds were occasionally transported over longer distances. As a consequence, maize diversity is geographically not characterised by sharp differences between farming communities; the main differences are to be found in regional occurrences. This challenges antimodern ideas of closed, local native ecologies. Consequently, the conservation of maize genetic resources is a challenge, but not entirely contradictory with its transforming socio-economic context.  相似文献   
6.
战国秦汉西南边疆思想的区域性特征初探   总被引:2,自引:0,他引:2  
文章主要对战国秦汉时期西南边疆思想的区域性特征进行了探讨,认为西南边疆开发的战略思想、经济思想和人才思想均表现出有别于其他地区的区域特征。在战国秦汉时期边疆开拓的战略思想和整体布局中,西南边疆虽然处于从属地位,开发实践中表现出一定的应急性和随意性,但开发成就显著,这与西南边疆开发策略思想的正确和实施的有效性有密切关系。北南向协济的区域经济思想和以西南本土籍巴蜀人治理西南边疆的人才思想指导下所确定的开发方略和治边措施,就是充分依托战国以来200余年西南北部巴蜀的开发成就和资源,进行西南南部边疆的开发和治理。  相似文献   
7.
In the 1970s and 1980s, regional analysis was an influential part of archaeological research, providing a discrete set of geographical tools inspired by a processual epistemological and interpretive perspective. With the advent of new technologies, new methods, and new paradigms, archaeological research on regional space has undergone significant changes. This article reviews the state of regional archaeology, beginning with a consideration of its history and a discussion of the fundamental issues facing regional investigations before focusing on developments over the last several years. On one hand, the diversification of archaeological theory has created new paradigms for thinking about human relationships with one another and with the physical environment across regional space; in this regard, historical ecology, landscape archaeology, and evolutionary theory have been particularly influential in recent years. This has led to a corresponding diversification of the traditional methods of regional analysis. Most notably, the advent of powerful digital technologies has introduced new tools, especially those from the geographic information sciences, that build on the quantitative methods of past approaches. The investigation of regional data is no longer based on a discrete toolkit of simple mathematical and graphical procedures for representing spatial relationships. Instead, regional archaeology has matured into a diversity of multiscalar spatial and geostatistical techniques that inform many areas of archaeological inquiry.  相似文献   
8.
In 1918, the Dutch government decided to enclose and reclaim the Zuider Zee (later called the IJsselmeer). The preceding decades had been marked by broad public debate about the utility and urgency of the project. Around 1900, its proponents constructed images of the region and of the Dutch nation in which the Zuider Zee was no longer a crossroads. They emphasized the backwardness of the area and depicted the sea as a domestic enemy, its violent storms posing a threat to the nation. Cornelis Lely’s Zuider Zee proposal (1891) promised a bright future for both the region and the Netherlands as a whole. The struggle against the water would revitalize the nation (by stimulating nation-building) and modernize its international image (perceived as a picturesque but archaic country). Opponents of the project feared the high costs and developed a counter-image: the Zuider Zee region as heartland of ‘authentic’ Dutch culture, a heritage that would be jeopardized by the project. The article concludes by highlighting the synchronicity of the non-synchronous: the Zuider Zee region was envisioned as a region living in the past, thereby constituting an ‘internal Other’ in a country undergoing rapid modernization around 1900.  相似文献   
9.
试论区域文化对区域经济发展的影响   总被引:9,自引:3,他引:6  
本文探讨文化和经济的关系,重点论述了区域文化对区域经济发展的滞缓或促进作用,并以宁夏的区情进行了例证。  相似文献   
10.
展望中国人文地理学的发展   总被引:15,自引:7,他引:8  
吴传钧 《人文地理》1996,11(Z1):1-10
中国自改革开放以来,人文地理学得到了复兴,在理论、方法和研究内容方面都有了新的发展,其中尤以经济地理学、城市地理学和旅游地理学的进展较快,原先被视为禁区的政治地理学、文化地理学和社会地理学,也开始出现了一批可喜的成果。目前在中国经济体制转轨的新形势下,中国人文地理学正处于一个重要的转折时期,即面临着严重的挑战,又出现了前所未有的发展机遇。
在迈入21世纪时,作者建议中国人文地理学着重研究以下各课题:
(1)为充实中国人文地理学的基础理论,研究人地关系地域系统;
(2)为配合(中国21世纪议程)的实施,研究全国和各地区社会经济的持续发展;
(3)以土地利用为中心来研究全球变化和人类活动的关系;
(4)从节约利用和保护资源出发,研究地区自然资源系统;
(5)为发扬中国地理学的传统,更认真地为农业服务,研究促进农业和农村的持续发展问题;
(6)从理论和方法上提高区域地理研究的水平、并配合国家任务,开展区域综合发展的研究,包括国家和各省经济建设的重点区、海域、生态脆弱区等。  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