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   417篇
  免费   14篇
  2024年   1篇
  2022年   2篇
  2021年   3篇
  2020年   18篇
  2019年   7篇
  2018年   16篇
  2017年   15篇
  2016年   13篇
  2015年   16篇
  2014年   9篇
  2013年   43篇
  2012年   39篇
  2011年   30篇
  2010年   25篇
  2009年   24篇
  2008年   27篇
  2007年   31篇
  2006年   20篇
  2005年   20篇
  2004年   18篇
  2003年   13篇
  2002年   11篇
  2001年   7篇
  2000年   13篇
  1998年   2篇
  1996年   1篇
  1994年   1篇
  1992年   1篇
  1991年   1篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1982年   1篇
排序方式: 共有431条查询结果,搜索用时 15 毫秒
81.
阳畔墓地是内蒙古中南部长城沿线地带发现的又一处东周时期游牧文化墓地,该墓地流行洞室墓、殉牲,并出土有青铜带扣、短剑、刀、管状饰、环等。与和林格尔县新店子墓地有相近之处,洞室墓与长城沿线西段的甘宁地区东周时期的墓葬存在文化、技术和人种上的交流关系。  相似文献   
82.
ABSTRACT

We integrate functional weed ecology with crop stable carbon and nitrogen isotope analysis to assess their combined potential for inferring arable land management practices in (semi-)arid regions from archaeobotanical assemblages. Weed and GIS survey of 60 cereal and pulse fields in Morocco are combined with crop sampling for stable isotope analysis to frame assessment of agricultural labour intensity in terms of manuring, irrigation, tillage and hand-weeding. Under low management intensity weed variation primarily reflects geographical differences, whereas under high management intensity fields in disparate regions have similar weed flora. Manured and irrigated oasis barley fields are clearly discriminated from less intensively manured rain-fed barley terraces in southern Morocco; when fields in northern and southern Morocco are considered together, climatic differences are superimposed on the agronomic intensity gradient. Barley δ13C and δ15N values clearly distinguish among the Moroccan regimes. An integrated approach combines crop isotope values with weed ecological discrimination of low- and high-intensity regimes across multiple studies (in southern Morocco and southern Europe). Analysis of archaeobotanical samples from EBA Tell Brak, Syria suggests that this early city was sustained through extensive (low-intensity, large-scale) cereal farming.  相似文献   
83.
Humans are ‘fire creatures’ that have used fire for millennia to shape local environments to diverse purposes. Our capacity for combustion has also forced global climatic changes and rendered the planet increasingly flammable, creating the conditions for progressively higher impact bushfires now and into the future. Meanwhile, governments in fire-prone countries such as Australia have continued to allow settlements to be established (and re-established) in wildland–urban interfaces. Like other ‘natural hazards’, bushfire is thereby a social phenomenon bound up with human values, practices and decisions. But, while studies of the social dimensions of ‘natural hazards’ are steadily rising, this scholarship has rarely addressed natural hazard management practitioners directly, precisely those authorised and entrusted to intervene in the distribution of hazard probabilities and consequences. This paper seeks to help remediate this research gap, illustrating how cultural, ecological, economic and political factors thoroughly condition hazard management and modes of intervention. Drawing on a case study in the Northern Territory’s Greater Darwin region, this paper suggests not only that examining such sociocultural realities provides new insights into hazards and their distribution, but also that attention to such issues is crucial to understanding our flammable future in the Anthropocene.  相似文献   
84.
山西古村镇类型及社会记忆符号系统研究   总被引:1,自引:0,他引:1  
社会记忆是依附于社会群体产生的一种趋同性的社会文化符号。本研究利用结构主义符号学的分析方法,通过“要素体-因子层-属性脉”的三维层次构建社会记忆的符号系统,基于中国传统社会生产、生活方式的视角,从地脉、人脉、文脉的“三脉”属性对古村镇的类型及特征进行解读,发现:①“农”型古村镇社会记忆的宜农宜居、望族乡贤、天人合一的三脉属性符号特征明显;②“商”型古村镇具有对外通达的地脉记忆,精致讲究的文脉记忆和名商名士的人脉记忆;③“军”型古村镇的社会记忆在据险扼要、防御之上、将军传奇的三脉属性特征更加突出;④“工”型古村镇具有矿藏丰富、炉旺风顺、匠人传奇的特色社会记忆的符号特征。  相似文献   
85.
Although the productive fishing grounds had long attracted the Crown and the Church to northern Sweden, it was not until the sixteenth century that the judicial and fiscal powers of the Swedish Crown were exercised in full. Records show that the regular fishing in interior lakes formed a prominent enterprise among coastal farmer communities. This paper examines the social and economic context of farmers engaged in interior fishing with respect to the internal organization of village communities, principles of private and collective ownership, land-use strategies and inter-community relations. There are no a-priori assumptions about the coastal population being “Swedish”. Instead of applying ethnonyms, the terms “farmer” and “coastal” are used throughout the paper. The main area of investigation includes the coastal area of northernmost Sweden and the western parts of Finnish Lapland. The study shows that interior lakes fitted into village resource areas, long sanctioned by usage, and that usufruct belonged to village members collectively. A large part of the fishing lakes are situated in interior Sámi territory. Fishermen were internalizing Sámi place names, implying close relations between the groups. Archeological investigations point to subsistence strategies including systemic interior lake fishing being established before AD 1200. The authors propose that coastal and interior communities should be perceived as two economic strategies representing indigenous and pre-colonial land-use schemes.  相似文献   
86.
邸乘光 《安徽史学》2015,(1):101-107
从1978年9月访朝归来到12月举行党的十一届三中全会,从"北方谈话"到"‘三中全会’主题报告",邓小平不仅明确提出了改革开放的时代课题,而且多方面地阐明了为什么要实行改革开放、要在哪些方面改革开放和如何实行改革开放等重大问题,实际完成了中国改革开放决策的酝酿,为"三中全会"最终作出实行改革开放的伟大决策,做好了充分的思想理论准备。回顾我国改革开放决策的酝酿过程,重温邓小平当时关于改革开放的论述,对在新的历史起点上全面深化改革开放具有多方面的意义。  相似文献   
87.
88.
Throughout the greater part of human evolution in Europe, use of plant foods is invisible and thus might have played a secondary role in nutrition. Ecological changes at the beginning of the early Holocene provoked innovations in early Mesolithic subsistence, focusing on the rich plant resources of the increasingly forested environment. High-resolution analyses of the excellently preserved and well-dated special task camps documented in detail at Duvensee, Northern Germany, offer an outstanding opportunity for case studies on Mesolithic subsistence and land use strategies. Quantification of the nut utilisation demonstrates the great importance of hazelnuts. These studies revealed very high return rates and allow for absolute assessments of the development of early Holocene economy. Stockpiling of the energy rich resource and an increased logistical capacity are innovations characterising an intensified early Mesolithic land use, which is reflected in the stable tradition of uniform seasonal settlement patterns at early Mesolithic Duvensee. The case study reveals characteristics in early Mesolithic subsistence and land use that anticipate attributes of the Neolithic economy.  相似文献   
89.
山西吉县柿子滩遗址第九地点发掘简报   总被引:4,自引:0,他引:4  
该地点出土的石器以锤击法打片、压剥法第二步加工和小型石片石器为主,刮削器、尖状器、砍砸器石器组合和细石叶压剥技术等代表了北方细石器文化的特征。出土的石磨盘、石磨棒、颜料块和研磨石等为研究旧石器时代晚期文化向新石器时代早期文化的过渡和华北地区原始农业的起源提供了资料。  相似文献   
90.
In 2009, the Sino-Japanese Joint Archaeological Team recovered the large-sized rammed-earthBuilding Foundation Ⅲ in the south of the Northern Wei palace city. This foundation is located to the north of ChangheGale and Building Foundation Ⅱ and the due south of Taiji Hall. It is the main body of a hall-typed architectureconsisting of the large-sized rammed-earth foundation, the rammed-earth partitions and column network composed oframmed-earth plinths and column pits. The side doors on the eastern and wester...  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